/* * tkText.c -- * * This module provides a big chunk of the implementation of multi-line * editable text widgets for Tk. Among other things, it provides the Tcl * command interfaces to text widgets. The B-tree representation of text * and its actual display are implemented elsewhere. * * Copyright (c) 1992-1994 The Regents of the University of California. * Copyright (c) 1994-1996 Sun Microsystems, Inc. * Copyright (c) 1999 by Scriptics Corporation. * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tkText.c,v 1.73 2007/02/22 13:56:32 dkf Exp $ */ #include "default.h" #include "tkPort.h" #include "tkInt.h" #include "tkUndo.h" #if defined(MAC_OSX_TK) #define Style TkStyle #define DInfo TkDInfo #endif /* * For compatibility with Tk 4.0 through 8.4.x, we allow tabs to be * mis-specified with non-increasing values. These are converted into tabs * which are the equivalent of at least a character width apart. */ #if (TK_MAJOR_VERSION < 9) #define _TK_ALLOW_DECREASING_TABS #endif #include "tkText.h" /* * Used to avoid having to allocate and deallocate arrays on the fly for * commonly used functions. Must be > 0. */ #define PIXEL_CLIENTS 5 /* * The 'TkTextState' enum in tkText.h is used to define a type for the -state * option of the Text widget. These values are used as indices into the string * table below. */ static char *stateStrings[] = { "disabled", "normal", NULL }; /* * The 'TkWrapMode' enum in tkText.h is used to define a type for the -wrap * option of the Text widget. These values are used as indices into the string * table below. */ static char *wrapStrings[] = { "char", "none", "word", NULL }; /* * The 'TkTextTabStyle' enum in tkText.h is used to define a type for the * -tabstyle option of the Text widget. These values are used as indices into * the string table below. */ static char *tabStyleStrings[] = { "tabular", "wordprocessor", NULL }; /* * The following functions and custom option type are used to define the * "line" option type, and thereby handle the text widget '-startline', * '-endline' configuration options which are of that type. * * We do not need a 'freeProc' because all changes to these two options are * handled through the TK_TEXT_LINE_RANGE flag in the optionSpecs list, and * the internal storage is just a pointer, which therefore doesn't need * freeing. */ static int SetLineStartEnd(ClientData clientData, Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj **value, char *recordPtr, int internalOffset, char *oldInternalPtr, int flags); static Tcl_Obj * GetLineStartEnd(ClientData clientData, Tk_Window tkwin, char *recordPtr, int internalOffset); static void RestoreLineStartEnd(ClientData clientData, Tk_Window tkwin, char *internalPtr, char *oldInternalPtr); static int ObjectIsEmpty(Tcl_Obj *objPtr); static Tk_ObjCustomOption lineOption = { "line", /* name */ SetLineStartEnd, /* setProc */ GetLineStartEnd, /* getProc */ RestoreLineStartEnd, /* restoreProc */ NULL, /* freeProc */ 0 }; /* * Information used to parse text configuration options: */ static const Tk_OptionSpec optionSpecs[] = { {TK_OPTION_BOOLEAN, "-autoseparators", "autoSeparators", "AutoSeparators", DEF_TEXT_AUTO_SEPARATORS, -1, Tk_Offset(TkText, autoSeparators), 0, 0, 0}, {TK_OPTION_BORDER, "-background", "background", "Background", DEF_TEXT_BG_COLOR, -1, Tk_Offset(TkText, border), 0, (ClientData) DEF_TEXT_BG_MONO, 0}, {TK_OPTION_SYNONYM, "-bd", NULL, NULL, NULL, 0, -1, 0, (ClientData) "-borderwidth", TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_SYNONYM, "-bg", NULL, NULL, NULL, 0, -1, 0, (ClientData) "-background", 0}, {TK_OPTION_BOOLEAN, "-blockcursor", "blockCursor", "BlockCursor", DEF_TEXT_BLOCK_CURSOR, -1, Tk_Offset(TkText, insertCursorType), 0, 0, 0}, {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", DEF_TEXT_BORDER_WIDTH, -1, Tk_Offset(TkText, borderWidth), 0, 0, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor", DEF_TEXT_CURSOR, -1, Tk_Offset(TkText, cursor), TK_OPTION_NULL_OK, 0, 0}, {TK_OPTION_CUSTOM, "-endline", NULL, NULL, NULL, -1, Tk_Offset(TkText, end), TK_OPTION_NULL_OK, (ClientData) &lineOption, TK_TEXT_LINE_RANGE}, {TK_OPTION_BOOLEAN, "-exportselection", "exportSelection", "ExportSelection", DEF_TEXT_EXPORT_SELECTION, -1, Tk_Offset(TkText, exportSelection), 0, 0, 0}, {TK_OPTION_SYNONYM, "-fg", "foreground", NULL, NULL, 0, -1, 0, (ClientData) "-foreground", 0}, {TK_OPTION_FONT, "-font", "font", "Font", DEF_TEXT_FONT, -1, Tk_Offset(TkText, tkfont), 0, 0, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground", DEF_TEXT_FG, -1, Tk_Offset(TkText, fgColor), 0, 0, 0}, {TK_OPTION_PIXELS, "-height", "height", "Height", DEF_TEXT_HEIGHT, -1, Tk_Offset(TkText, height), 0, 0, 0}, {TK_OPTION_COLOR, "-highlightbackground", "highlightBackground", "HighlightBackground", DEF_TEXT_HIGHLIGHT_BG, -1, Tk_Offset(TkText, highlightBgColorPtr), 0, 0, 0}, {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor", DEF_TEXT_HIGHLIGHT, -1, Tk_Offset(TkText, highlightColorPtr), 0, 0, 0}, {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness", "HighlightThickness", DEF_TEXT_HIGHLIGHT_WIDTH, -1, Tk_Offset(TkText, highlightWidth), 0, 0, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_BORDER, "-inactiveselectbackground","inactiveSelectBackground", "Foreground", DEF_TEXT_INACTIVE_SELECT_COLOR, -1, Tk_Offset(TkText, inactiveSelBorder), TK_OPTION_NULL_OK, (ClientData) DEF_TEXT_SELECT_MONO, 0}, {TK_OPTION_BORDER, "-insertbackground", "insertBackground", "Foreground", DEF_TEXT_INSERT_BG, -1, Tk_Offset(TkText, insertBorder), 0, 0, 0}, {TK_OPTION_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth", DEF_TEXT_INSERT_BD_COLOR, -1, Tk_Offset(TkText, insertBorderWidth), 0, (ClientData) DEF_TEXT_INSERT_BD_MONO, 0}, {TK_OPTION_INT, "-insertofftime", "insertOffTime", "OffTime", DEF_TEXT_INSERT_OFF_TIME, -1, Tk_Offset(TkText, insertOffTime), 0, 0, 0}, {TK_OPTION_INT, "-insertontime", "insertOnTime", "OnTime", DEF_TEXT_INSERT_ON_TIME, -1, Tk_Offset(TkText, insertOnTime), 0, 0, 0}, {TK_OPTION_PIXELS, "-insertwidth", "insertWidth", "InsertWidth", DEF_TEXT_INSERT_WIDTH, -1, Tk_Offset(TkText, insertWidth), 0, 0, 0}, {TK_OPTION_INT, "-maxundo", "maxUndo", "MaxUndo", DEF_TEXT_MAX_UNDO, -1, Tk_Offset(TkText, maxUndo), 0, 0, 0}, {TK_OPTION_PIXELS, "-padx", "padX", "Pad", DEF_TEXT_PADX, -1, Tk_Offset(TkText, padX), 0, 0, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_PIXELS, "-pady", "padY", "Pad", DEF_TEXT_PADY, -1, Tk_Offset(TkText, padY), 0, 0, 0}, {TK_OPTION_RELIEF, "-relief", "relief", "Relief", DEF_TEXT_RELIEF, -1, Tk_Offset(TkText, relief), 0, 0, 0}, {TK_OPTION_BORDER, "-selectbackground", "selectBackground", "Foreground", DEF_TEXT_SELECT_COLOR, -1, Tk_Offset(TkText, selBorder), 0, (ClientData) DEF_TEXT_SELECT_MONO, 0}, {TK_OPTION_PIXELS, "-selectborderwidth", "selectBorderWidth", "BorderWidth", DEF_TEXT_SELECT_BD_COLOR, Tk_Offset(TkText, selBorderWidthPtr), Tk_Offset(TkText, selBorderWidth), TK_OPTION_NULL_OK, (ClientData) DEF_TEXT_SELECT_BD_MONO, 0}, {TK_OPTION_COLOR, "-selectforeground", "selectForeground", "Background", DEF_TEXT_SELECT_FG_COLOR, -1, Tk_Offset(TkText, selFgColorPtr), 0, (ClientData) DEF_TEXT_SELECT_FG_MONO, 0}, {TK_OPTION_BOOLEAN, "-setgrid", "setGrid", "SetGrid", DEF_TEXT_SET_GRID, -1, Tk_Offset(TkText, setGrid), 0, 0, 0}, {TK_OPTION_PIXELS, "-spacing1", "spacing1", "Spacing", DEF_TEXT_SPACING1, -1, Tk_Offset(TkText, spacing1), TK_OPTION_DONT_SET_DEFAULT, 0 , TK_TEXT_LINE_GEOMETRY }, {TK_OPTION_PIXELS, "-spacing2", "spacing2", "Spacing", DEF_TEXT_SPACING2, -1, Tk_Offset(TkText, spacing2), TK_OPTION_DONT_SET_DEFAULT, 0 , TK_TEXT_LINE_GEOMETRY }, {TK_OPTION_PIXELS, "-spacing3", "spacing3", "Spacing", DEF_TEXT_SPACING3, -1, Tk_Offset(TkText, spacing3), TK_OPTION_DONT_SET_DEFAULT, 0 , TK_TEXT_LINE_GEOMETRY }, {TK_OPTION_CUSTOM, "-startline", NULL, NULL, NULL, -1, Tk_Offset(TkText, start), TK_OPTION_NULL_OK, (ClientData) &lineOption, TK_TEXT_LINE_RANGE}, {TK_OPTION_STRING_TABLE, "-state", "state", "State", DEF_TEXT_STATE, -1, Tk_Offset(TkText, state), 0, (ClientData) stateStrings, 0}, {TK_OPTION_STRING, "-tabs", "tabs", "Tabs", DEF_TEXT_TABS, Tk_Offset(TkText, tabOptionPtr), -1, TK_OPTION_NULL_OK, 0, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_STRING_TABLE, "-tabstyle", "tabStyle", "TabStyle", DEF_TEXT_TABSTYLE, -1, Tk_Offset(TkText, tabStyle), 0, (ClientData) tabStyleStrings, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus", DEF_TEXT_TAKE_FOCUS, -1, Tk_Offset(TkText, takeFocus), TK_OPTION_NULL_OK, 0, 0}, {TK_OPTION_BOOLEAN, "-undo", "undo", "Undo", DEF_TEXT_UNDO, -1, Tk_Offset(TkText, undo), 0, 0 , 0}, {TK_OPTION_INT, "-width", "width", "Width", DEF_TEXT_WIDTH, -1, Tk_Offset(TkText, width), 0, 0, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_STRING_TABLE, "-wrap", "wrap", "Wrap", DEF_TEXT_WRAP, -1, Tk_Offset(TkText, wrapMode), 0, (ClientData) wrapStrings, TK_TEXT_LINE_GEOMETRY}, {TK_OPTION_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand", DEF_TEXT_XSCROLL_COMMAND, -1, Tk_Offset(TkText, xScrollCmd), TK_OPTION_NULL_OK, 0, 0}, {TK_OPTION_STRING, "-yscrollcommand", "yScrollCommand", "ScrollCommand", DEF_TEXT_YSCROLL_COMMAND, -1, Tk_Offset(TkText, yScrollCmd), TK_OPTION_NULL_OK, 0, 0}, {TK_OPTION_END} }; /* * These three typedefs, the structure and the SearchPerform, SearchCore * functions below are used for line-based searches of the text widget, and, * in particular, to handle multi-line matching even though the text widget is * a single-line based data structure. They are completely abstracted away * from the Text widget internals, however, so could easily be re-used with * any line-based entity to provide multi-line matching. * * We have abstracted this code away from the text widget to try to keep Tk as * modular as possible. */ struct SearchSpec; /* Forward declaration. */ typedef ClientData SearchAddLineProc(int lineNum, struct SearchSpec *searchSpecPtr, Tcl_Obj *theLine, int *lenPtr, int *extraLinesPtr); typedef int SearchMatchProc(int lineNum, struct SearchSpec *searchSpecPtr, ClientData clientData, Tcl_Obj *theLine, int matchOffset, int matchLength); typedef int SearchLineIndexProc(Tcl_Interp *interp, Tcl_Obj *objPtr, struct SearchSpec *searchSpecPtr, int *linePosPtr, int *offsetPosPtr); typedef struct SearchSpec { int exact; /* Whether search is exact or regexp. */ int noCase; /* Case-insenstivive? */ int noLineStop; /* If not set, a regexp search will use the * TCL_REG_NLSTOP flag. */ int overlap; /* If set, results from multiple searches * (-all) are allowed to overlap each * other. */ int strictLimits; /* If set, matches must be completely inside * the from,to range. Otherwise the limits * only apply to the start of each match. */ int all; /* Whether all or the first match should be * reported. */ int startLine; /* First line to examine. */ int startOffset; /* Index in first line to start at. */ int stopLine; /* Last line to examine, or -1 when we search * all available text. */ int stopOffset; /* Index to stop at, provided stopLine is not * -1. */ int numLines; /* Total lines which are available. */ int backwards; /* Searching forwards or backwards. */ Tcl_Obj *varPtr; /* If non-NULL, store length(s) of match(es) * in this variable. */ Tcl_Obj *countPtr; /* Keeps track of currently found lengths. */ Tcl_Obj *resPtr; /* Keeps track of currently found locations */ int searchElide; /* Search in hidden text as well. */ SearchAddLineProc *addLineProc; /* Function to call when we need to add * another line to the search string so far */ SearchMatchProc *foundMatchProc; /* Function to call when we have found a * match. */ SearchLineIndexProc *lineIndexProc; /* Function to call when we have found a * match. */ ClientData clientData; /* Information about structure being searched, * in this case a text widget. */ } SearchSpec; /* * The text-widget-independent functions which actually perform the search, * handling both regexp and exact searches. */ static int SearchCore(Tcl_Interp *interp, SearchSpec *searchSpecPtr, Tcl_Obj *patObj); static int SearchPerform(Tcl_Interp *interp, SearchSpec *searchSpecPtr, Tcl_Obj *patObj, Tcl_Obj *fromPtr, Tcl_Obj *toPtr); /* * Boolean variable indicating whether or not special debugging code should be * executed. */ int tkTextDebug = 0; /* * Forward declarations for functions defined later in this file: */ static int ConfigureText(Tcl_Interp *interp, TkText *textPtr, int objc, Tcl_Obj *CONST objv[]); static int DeleteIndexRange(TkSharedText *sharedPtr, TkText *textPtr, CONST TkTextIndex *indexPtr1, CONST TkTextIndex *indexPtr2, int viewUpdate); static int CountIndices(CONST TkText *textPtr, CONST TkTextIndex *indexPtr1, CONST TkTextIndex *indexPtr2, TkTextCountType type); static void DestroyText(TkText *textPtr); static int InsertChars(TkSharedText *sharedTextPtr, TkText *textPtr, TkTextIndex *indexPtr, Tcl_Obj *stringPtr, int viewUpdate); static void TextBlinkProc(ClientData clientData); static void TextCmdDeletedProc(ClientData clientData); static int CreateWidget(TkSharedText *sharedPtr, Tk_Window tkwin, Tcl_Interp *interp, CONST TkText *parent, int objc, Tcl_Obj *CONST objv[]); static void TextEventProc(ClientData clientData, XEvent *eventPtr); static int TextFetchSelection(ClientData clientData, int offset, char *buffer, int maxBytes); static int TextIndexSortProc(CONST void *first, CONST void *second); static int TextInsertCmd(TkSharedText *sharedTextPtr, TkText *textPtr, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], CONST TkTextIndex *indexPtr, int viewUpdate); static int TextReplaceCmd(TkText *textPtr, Tcl_Interp *interp, CONST TkTextIndex *indexFromPtr, CONST TkTextIndex *indexToPtr, int objc, Tcl_Obj *CONST objv[], int viewUpdate); static int TextSearchCmd(TkText *textPtr, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]); static int TextEditCmd(TkText *textPtr, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]); static int TextWidgetObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]); static int SharedTextObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]); static void TextWorldChangedCallback(ClientData instanceData); static void TextWorldChanged(TkText *textPtr, int mask); static int TextDumpCmd(TkText *textPtr, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]); static int DumpLine(Tcl_Interp *interp, TkText *textPtr, int what, TkTextLine *linePtr, int start, int end, int lineno, Tcl_Obj *command); static int DumpSegment(TkText *textPtr, Tcl_Interp *interp, CONST char *key, CONST char *value, Tcl_Obj *command, CONST TkTextIndex *index, int what); static int TextEditUndo(TkText *textPtr); static int TextEditRedo(TkText *textPtr); static Tcl_Obj * TextGetText(CONST TkText *textPtr, CONST TkTextIndex *index1, CONST TkTextIndex *index2, int visibleOnly); static void UpdateDirtyFlag(TkSharedText *sharedPtr); static void TextPushUndoAction(TkText *textPtr, Tcl_Obj *undoString, int insert, CONST TkTextIndex *index1Ptr, CONST TkTextIndex *index2Ptr); static int TextSearchIndexInLine(CONST SearchSpec *searchSpecPtr, TkTextLine *linePtr, int byteIndex); static int TextPeerCmd(TkText *textPtr, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]); static TkUndoProc TextUndoRedoCallback; /* * Declarations of the three search procs required by the multi-line search * routines. */ static SearchMatchProc TextSearchFoundMatch; static SearchAddLineProc TextSearchAddNextLine; static SearchLineIndexProc TextSearchGetLineIndex; /* * The structure below defines text class behavior by means of functions that * can be invoked from generic window code. */ static Tk_ClassProcs textClass = { sizeof(Tk_ClassProcs), /* size */ TextWorldChangedCallback, /* worldChangedProc */ }; /* *-------------------------------------------------------------- * * Tk_TextObjCmd -- * * This function is invoked to process the "text" Tcl command. See the * user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *-------------------------------------------------------------- */ int Tk_TextObjCmd( ClientData clientData, /* Main window associated with interpreter. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { Tk_Window tkwin = (Tk_Window) clientData; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "pathName ?options?"); return TCL_ERROR; } return CreateWidget(NULL, tkwin, interp, NULL, objc, objv); } /* *-------------------------------------------------------------- * * CreateWidget -- * * This function is invoked to process the "text" Tcl command, (when * called by Tk_TextObjCmd) and the "$text peer create" text widget * sub-command (called from TextPeerCmd). * * See the user documentation for details on what it does. * * Results: * A standard Tcl result, places the name of the widget created into the * interp's result. * * Side effects: * See the user documentation. * *-------------------------------------------------------------- */ static int CreateWidget( TkSharedText *sharedPtr, /* Shared widget info, or NULL. */ Tk_Window tkwin, /* Main window associated with interpreter. */ Tcl_Interp *interp, /* Current interpreter. */ CONST TkText *parent, /* If non-NULL then take default start, end * from this parent. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { register TkText *textPtr; Tk_OptionTable optionTable; TkTextIndex startIndex; Tk_Window newWin; /* * Create the window. */ newWin = Tk_CreateWindowFromPath(interp, tkwin, Tcl_GetString(objv[1]), NULL); if (newWin == NULL) { return TCL_ERROR; } /* * Create the text widget and initialize everything to zero, then set the * necessary initial (non-NULL) values. It is important that the 'set' tag * and 'insert', 'current' mark pointers are all NULL to start. */ textPtr = (TkText *) ckalloc(sizeof(TkText)); memset(textPtr, 0, sizeof(TkText)); textPtr->tkwin = newWin; textPtr->display = Tk_Display(newWin); textPtr->interp = interp; textPtr->widgetCmd = Tcl_CreateObjCommand(interp, Tk_PathName(textPtr->tkwin), TextWidgetObjCmd, (ClientData) textPtr, TextCmdDeletedProc); if (sharedPtr == NULL) { sharedPtr = (TkSharedText *) ckalloc(sizeof(TkSharedText)); memset(sharedPtr, 0, sizeof(TkSharedText)); sharedPtr->refCount = 0; sharedPtr->peers = NULL; sharedPtr->tree = TkBTreeCreate(sharedPtr); Tcl_InitHashTable(&sharedPtr->tagTable, TCL_STRING_KEYS); Tcl_InitHashTable(&sharedPtr->markTable, TCL_STRING_KEYS); Tcl_InitHashTable(&sharedPtr->windowTable, TCL_STRING_KEYS); Tcl_InitHashTable(&sharedPtr->imageTable, TCL_STRING_KEYS); sharedPtr->undoStack = TkUndoInitStack(interp,0); sharedPtr->undo = 1; sharedPtr->isDirtyIncrement = 1; sharedPtr->autoSeparators = 1; sharedPtr->lastEditMode = TK_TEXT_EDIT_OTHER; sharedPtr->stateEpoch = 0; } /* * Add the new widget to the shared list. */ textPtr->sharedTextPtr = sharedPtr; sharedPtr->refCount++; textPtr->next = sharedPtr->peers; sharedPtr->peers = textPtr; /* * This refCount will be held until DestroyText is called. Note also that * the later call to 'TkTextCreateDInfo' will add more refCounts. */ textPtr->refCount = 1; /* * Specify start and end lines in the B-tree. The default is the same as * the parent, but this can be adjusted to display more or less if the * start, end where given as configuration options. */ if (parent != NULL) { textPtr->start = parent->start; textPtr->end = parent->end; } else { textPtr->start = NULL; textPtr->end = NULL; } /* * Register with the B-tree. In some sense it would be best if we could do * this later (after configuration options), so that any changes to * start,end do not require a total recalculation. */ TkBTreeAddClient(sharedPtr->tree, textPtr, textPtr->charHeight); textPtr->state = TK_TEXT_STATE_NORMAL; textPtr->relief = TK_RELIEF_FLAT; textPtr->cursor = None; textPtr->charWidth = 1; textPtr->charHeight = 10; textPtr->wrapMode = TEXT_WRAPMODE_CHAR; textPtr->prevWidth = Tk_Width(newWin); textPtr->prevHeight = Tk_Height(newWin); /* * This will add refCounts to textPtr. */ TkTextCreateDInfo(textPtr); TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, 0, 0, &startIndex); TkTextSetYView(textPtr, &startIndex, 0); textPtr->exportSelection = 1; textPtr->pickEvent.type = LeaveNotify; textPtr->undo = textPtr->sharedTextPtr->undo; textPtr->maxUndo = textPtr->sharedTextPtr->maxUndo; textPtr->autoSeparators = textPtr->sharedTextPtr->autoSeparators; textPtr->tabOptionPtr = NULL; /* * Create the "sel" tag and the "current" and "insert" marks. */ textPtr->selBorder = NULL; textPtr->inactiveSelBorder = NULL; textPtr->selBorderWidth = 0; textPtr->selBorderWidthPtr = NULL; textPtr->selFgColorPtr = NULL; /* * Note: it is important that textPtr->selTagPtr is NULL before this * initial call. */ textPtr->selTagPtr = TkTextCreateTag(textPtr, "sel", NULL); textPtr->selTagPtr->reliefString = (char *) ckalloc(sizeof(DEF_TEXT_SELECT_RELIEF)); strcpy(textPtr->selTagPtr->reliefString, DEF_TEXT_SELECT_RELIEF); Tk_GetRelief(interp, DEF_TEXT_SELECT_RELIEF, &textPtr->selTagPtr->relief); textPtr->currentMarkPtr = TkTextSetMark(textPtr, "current", &startIndex); textPtr->insertMarkPtr = TkTextSetMark(textPtr, "insert", &startIndex); /* * Create the option table for this widget class. If it has already been * created, the cached pointer will be returned. */ optionTable = Tk_CreateOptionTable(interp, optionSpecs); Tk_SetClass(textPtr->tkwin, "Text"); Tk_SetClassProcs(textPtr->tkwin, &textClass, (ClientData) textPtr); textPtr->optionTable = optionTable; Tk_CreateEventHandler(textPtr->tkwin, ExposureMask|StructureNotifyMask|FocusChangeMask, TextEventProc, (ClientData) textPtr); Tk_CreateEventHandler(textPtr->tkwin, KeyPressMask|KeyReleaseMask |ButtonPressMask|ButtonReleaseMask|EnterWindowMask |LeaveWindowMask|PointerMotionMask|VirtualEventMask, TkTextBindProc, (ClientData) textPtr); Tk_CreateSelHandler(textPtr->tkwin, XA_PRIMARY, XA_STRING, TextFetchSelection, (ClientData) textPtr, XA_STRING); if (Tk_InitOptions(interp, (char *) textPtr, optionTable, textPtr->tkwin) != TCL_OK) { Tk_DestroyWindow(textPtr->tkwin); return TCL_ERROR; } if (ConfigureText(interp, textPtr, objc-2, objv+2) != TCL_OK) { Tk_DestroyWindow(textPtr->tkwin); return TCL_ERROR; } Tcl_SetObjResult(interp, Tcl_NewStringObj(Tk_PathName(textPtr->tkwin),-1)); return TCL_OK; } /* *-------------------------------------------------------------- * * TextWidgetObjCmd -- * * This function is invoked to process the Tcl command that corresponds * to a text widget. See the user documentation for details on what it * does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *-------------------------------------------------------------- */ static int TextWidgetObjCmd( ClientData clientData, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { register TkText *textPtr = (TkText *) clientData; int result = TCL_OK; int index; static CONST char *optionStrings[] = { "bbox", "cget", "compare", "configure", "count", "debug", "delete" "dlineinfo", "dump", "edit", "get", "image", "index", "insert", "mark", "peer", "replace", "scan", "search", "see", "tag", "window", "xview", "yview", NULL }; enum options { TEXT_BBOX, TEXT_CGET, TEXT_COMPARE, TEXT_CONFIGURE, TEXT_COUNT, TEXT_DEBUG, TEXT_DELETE, TEXT_DLINEINFO, TEXT_DUMP, TEXT_EDIT, TEXT_GET, TEXT_IMAGE, TEXT_INDEX, TEXT_INSERT, TEXT_MARK, TEXT_PEER, TEXT_REPLACE, TEXT_SCAN, TEXT_SEARCH, TEXT_SEE, TEXT_TAG, TEXT_WINDOW, TEXT_XVIEW, TEXT_YVIEW }; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0, &index) != TCL_OK) { return TCL_ERROR; } textPtr->refCount++; switch ((enum options) index) { case TEXT_BBOX: { int x, y, width, height; CONST TkTextIndex *indexPtr; if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "index"); result = TCL_ERROR; goto done; } indexPtr = TkTextGetIndexFromObj(interp, textPtr, objv[2]); if (indexPtr == NULL) { result = TCL_ERROR; goto done; } if (TkTextIndexBbox(textPtr, indexPtr, &x, &y, &width, &height, NULL) == 0) { Tcl_Obj *listObj = Tcl_NewListObj(0, NULL); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(x)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(y)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(width)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(height)); Tcl_SetObjResult(interp, listObj); } break; } case TEXT_CGET: if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "option"); result = TCL_ERROR; goto done; } else { Tcl_Obj *objPtr = Tk_GetOptionValue(interp, (char *) textPtr, textPtr->optionTable, objv[2], textPtr->tkwin); if (objPtr == NULL) { result = TCL_ERROR; goto done; } else { Tcl_SetObjResult(interp, objPtr); result = TCL_OK; } } break; case TEXT_COMPARE: { int relation, value; CONST char *p; CONST TkTextIndex *index1Ptr, *index2Ptr; if (objc != 5) { Tcl_WrongNumArgs(interp, 2, objv, "index1 op index2"); result = TCL_ERROR; goto done; } index1Ptr = TkTextGetIndexFromObj(interp, textPtr, objv[2]); index2Ptr = TkTextGetIndexFromObj(interp, textPtr, objv[4]); if (index1Ptr == NULL || index2Ptr == NULL) { result = TCL_ERROR; goto done; } relation = TkTextIndexCmp(index1Ptr, index2Ptr); p = Tcl_GetString(objv[3]); if (p[0] == '<') { value = (relation < 0); if ((p[1] == '=') && (p[2] == 0)) { value = (relation <= 0); } else if (p[1] != 0) { compareError: Tcl_AppendResult(interp, "bad comparison operator \"", Tcl_GetString(objv[3]), "\": must be <, <=, ==, >=, >, or !=", NULL); result = TCL_ERROR; goto done; } } else if (p[0] == '>') { value = (relation > 0); if ((p[1] == '=') && (p[2] == 0)) { value = (relation >= 0); } else if (p[1] != 0) { goto compareError; } } else if ((p[0] == '=') && (p[1] == '=') && (p[2] == 0)) { value = (relation == 0); } else if ((p[0] == '!') && (p[1] == '=') && (p[2] == 0)) { value = (relation != 0); } else { goto compareError; } Tcl_SetObjResult(interp, Tcl_NewBooleanObj(value)); break; } case TEXT_CONFIGURE: if (objc <= 3) { Tcl_Obj *objPtr = Tk_GetOptionInfo(interp, (char *) textPtr, textPtr->optionTable, ((objc == 3) ? objv[2] : NULL), textPtr->tkwin); if (objPtr == NULL) { result = TCL_ERROR; goto done; } else { Tcl_SetObjResult(interp, objPtr); } } else { result = ConfigureText(interp, textPtr, objc-2, objv+2); } break; case TEXT_COUNT: { CONST TkTextIndex *indexFromPtr, *indexToPtr; int i, found = 0, update = 0; Tcl_Obj *objPtr = NULL; if (objc < 4) { Tcl_WrongNumArgs(interp, 2, objv, "?options? index1 index2"); result = TCL_ERROR; goto done; } indexFromPtr = TkTextGetIndexFromObj(interp, textPtr, objv[objc-2]); if (indexFromPtr == NULL) { result = TCL_ERROR; goto done; } indexToPtr = TkTextGetIndexFromObj(interp, textPtr, objv[objc-1]); if (indexToPtr == NULL) { result = TCL_ERROR; goto done; } for (i = 2; i < objc-2; i++) { int value, length; CONST char *option = Tcl_GetStringFromObj(objv[i], &length); char c; if (length < 2 || option[0] != '-') { badOption: Tcl_ResetResult(interp); Tcl_AppendResult(interp, "bad option \"", Tcl_GetString(objv[i]), "\" must be -chars, -displaychars, -displayindices, ", "-displaylines, -indices, -lines, -update, ", "-xpixels, or -ypixels", NULL); result = TCL_ERROR; goto done; } c = option[1]; if (c == 'c' && !strncmp("-chars", option, (unsigned) length)) { value = CountIndices(textPtr, indexFromPtr, indexToPtr, COUNT_CHARS); } else if (c == 'd' && (length > 8) && !strncmp("-displaychars", option, (unsigned) length)) { value = CountIndices(textPtr, indexFromPtr, indexToPtr, COUNT_DISPLAY_CHARS); } else if (c == 'd' && (length > 8) && !strncmp("-displayindices", option,(unsigned)length)) { value = CountIndices(textPtr, indexFromPtr, indexToPtr, COUNT_DISPLAY_INDICES); } else if (c == 'd' && (length > 8) && !strncmp("-displaylines", option, (unsigned) length)) { TkTextLine *fromPtr, *lastPtr; TkTextIndex index; int compare = TkTextIndexCmp(indexFromPtr, indexToPtr); value = 0; if (compare == 0) { goto countDone; } if (compare > 0) { CONST TkTextIndex *tmpPtr = indexFromPtr; indexFromPtr = indexToPtr; indexToPtr = tmpPtr; } lastPtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, TkBTreeNumLines(textPtr->sharedTextPtr->tree,textPtr)); fromPtr = indexFromPtr->linePtr; if (fromPtr == lastPtr) { goto countDone; } /* * Caution: we must NEVER call TkTextUpdateOneLine with the * last artificial line in the widget. */ index = *indexFromPtr; index.byteIndex = 0; /* * We're going to count up all display lines in the logical * line of 'indexFromPtr' up to, but not including the logical * line of 'indexToPtr', and then subtract off what we didn't * what from 'from' and add on what we didn't count from 'to. */ while (index.linePtr != indexToPtr->linePtr) { value += TkTextUpdateOneLine(textPtr, fromPtr,0,&index,0); /* * We might have skipped past indexToPtr, if we have * multiple logical lines in a single display line. * Therefore we iterate through each intermediate logical * line, just to check. Another approach would be just to * use TkTextIndexCmp on every while() iteration, but that * would be less efficient. */ while (fromPtr != index.linePtr) { fromPtr = TkBTreeNextLine(textPtr, fromPtr); if (fromPtr == indexToPtr->linePtr) { break; } } } /* * Now we need to adjust the count to add on the number of * display lines in the last logical line, and subtract off * the number of display lines overcounted in the first * logical line. This logic is still ok if both indices are in * the same logical line. */ index.linePtr = indexFromPtr->linePtr; index.byteIndex = 0; while (1) { TkTextFindDisplayLineEnd(textPtr, &index, 1, NULL); if (index.byteIndex >= indexFromPtr->byteIndex) { break; } TkTextIndexForwBytes(textPtr, &index, 1, &index); value--; } if (indexToPtr->linePtr != lastPtr) { index.linePtr = indexToPtr->linePtr; index.byteIndex = 0; while (1) { TkTextFindDisplayLineEnd(textPtr, &index, 1, NULL); if (index.byteIndex >= indexToPtr->byteIndex) { break; } TkTextIndexForwBytes(textPtr, &index, 1, &index); value++; } } if (compare > 0) { value = -value; } } else if (c == 'i' && !strncmp("-indices", option, (unsigned) length)) { value = CountIndices(textPtr, indexFromPtr, indexToPtr, COUNT_INDICES); } else if (c == 'l' && !strncmp("-lines", option, (unsigned) length)) { value = TkBTreeLinesTo(textPtr, indexToPtr->linePtr) - TkBTreeLinesTo(textPtr, indexFromPtr->linePtr); } else if (c == 'u' && !strncmp("-update", option, (unsigned) length)) { update = 1; continue; } else if (c == 'x' && !strncmp("-xpixels", option, (unsigned) length)) { int x1, x2; TkTextIndex index; index = *indexFromPtr; TkTextFindDisplayLineEnd(textPtr, &index, 0, &x1); index = *indexToPtr; TkTextFindDisplayLineEnd(textPtr, &index, 0, &x2); value = x2 - x1; } else if (c == 'y' && !strncmp("-ypixels", option, (unsigned) length)) { if (update) { TkTextUpdateLineMetrics(textPtr, TkBTreeLinesTo(textPtr, indexFromPtr->linePtr), TkBTreeLinesTo(textPtr, indexToPtr->linePtr), -1); } value = TkTextIndexYPixels(textPtr, indexToPtr) - TkTextIndexYPixels(textPtr, indexFromPtr); } else { goto badOption; } countDone: found++; if (found == 1) { Tcl_SetObjResult(interp, Tcl_NewIntObj(value)); } else { if (found == 2) { /* * Move the first item we put into the result into the * first element of the list object. */ objPtr = Tcl_NewObj(); Tcl_ListObjAppendElement(NULL, objPtr, Tcl_GetObjResult(interp)); } Tcl_ListObjAppendElement(NULL, objPtr, Tcl_NewIntObj(value)); } } if (found == 0) { /* * Use the default '-indices'. */ int value = CountIndices(textPtr, indexFromPtr, indexToPtr, COUNT_INDICES); Tcl_SetObjResult(interp, Tcl_NewIntObj(value)); } else if (found > 1) { Tcl_SetObjResult(interp, objPtr); } break; } case TEXT_DEBUG: if (objc > 3) { Tcl_WrongNumArgs(interp, 2, objv, "boolean"); result = TCL_ERROR; goto done; } if (objc == 2) { Tcl_SetObjResult(interp, Tcl_NewBooleanObj(tkBTreeDebug)); } else { if (Tcl_GetBooleanFromObj(interp, objv[2], &tkBTreeDebug) != TCL_OK) { result = TCL_ERROR; goto done; } tkTextDebug = tkBTreeDebug; } break; case TEXT_DELETE: if (objc < 3) { Tcl_WrongNumArgs(interp, 2, objv, "index1 ?index2 ...?"); result = TCL_ERROR; goto done; } if (textPtr->state == TK_TEXT_STATE_NORMAL) { if (objc < 5) { /* * Simple case requires no predetermination of indices. */ CONST TkTextIndex *indexPtr1, *indexPtr2; /* * Parse the starting and stopping indices. */ indexPtr1 = TkTextGetIndexFromObj(textPtr->interp, textPtr, objv[2]); if (indexPtr1 == NULL) { result = TCL_ERROR; goto done; } if (objc == 4) { indexPtr2 = TkTextGetIndexFromObj(textPtr->interp, textPtr, objv[3]); if (indexPtr2 == NULL) { result = TCL_ERROR; goto done; } } else { indexPtr2 = NULL; } DeleteIndexRange(NULL, textPtr, indexPtr1, indexPtr2, 1); } else { /* * Multi-index pair case requires that we prevalidate the * indices and sort from last to first so that deletes occur * in the exact (unshifted) text. It also needs to handle * partial and fully overlapping ranges. We have to do this * with multiple passes. */ TkTextIndex *indices, *ixStart, *ixEnd, *lastStart; char *useIdx; int i; objc -= 2; objv += 2; indices = (TkTextIndex *) ckalloc((objc + 1) * sizeof(TkTextIndex)); /* * First pass verifies that all indices are valid. */ for (i = 0; i < objc; i++) { CONST TkTextIndex *indexPtr = TkTextGetIndexFromObj(interp, textPtr, objv[i]); if (indexPtr == NULL) { result = TCL_ERROR; ckfree((char *) indices); goto done; } indices[i] = *indexPtr; } /* * Pad out the pairs evenly to make later code easier. */ if (objc & 1) { indices[i] = indices[i-1]; TkTextIndexForwChars(NULL, &indices[i], 1, &indices[i], COUNT_INDICES); objc++; } useIdx = (char *) ckalloc((unsigned) objc); memset(useIdx, 0, (unsigned) objc); /* * Do a decreasing order sort so that we delete the end ranges * first to maintain index consistency. */ qsort(indices, (unsigned) objc / 2, 2 * sizeof(TkTextIndex), TextIndexSortProc); lastStart = NULL; /* * Second pass will handle bogus ranges (end < start) and * overlapping ranges. */ for (i = 0; i < objc; i += 2) { ixStart = &indices[i]; ixEnd = &indices[i+1]; if (TkTextIndexCmp(ixEnd, ixStart) <= 0) { continue; } if (lastStart) { if (TkTextIndexCmp(ixStart, lastStart) == 0) { /* * Start indices were equal, and the sort placed * the longest range first, so skip this one. */ continue; } else if (TkTextIndexCmp(lastStart, ixEnd) < 0) { /* * The next pair has a start range before the end * point of the last range. Constrain the delete * range, but use the pointer values. */ *ixEnd = *lastStart; if (TkTextIndexCmp(ixEnd, ixStart) <= 0) { continue; } } } lastStart = ixStart; useIdx[i] = 1; } /* * Final pass take the input from the previous and deletes the * ranges which are flagged to be deleted. */ for (i = 0; i < objc; i += 2) { if (useIdx[i]) { /* * We don't need to check the return value because all * indices are preparsed above. */ DeleteIndexRange(NULL, textPtr, &indices[i], &indices[i+1], 1); } } ckfree((char *) indices); } } break; case TEXT_DLINEINFO: { int x, y, width, height, base; CONST TkTextIndex *indexPtr; if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "index"); result = TCL_ERROR; goto done; } indexPtr = TkTextGetIndexFromObj(interp, textPtr, objv[2]); if (indexPtr == NULL) { result = TCL_ERROR; goto done; } if (TkTextDLineInfo(textPtr, indexPtr, &x, &y, &width, &height, &base) == 0) { Tcl_Obj *listObj = Tcl_NewListObj(0, NULL); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(x)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(y)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(width)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(height)); Tcl_ListObjAppendElement(interp, listObj, Tcl_NewIntObj(base)); Tcl_SetObjResult(interp, listObj); } break; } case TEXT_DUMP: result = TextDumpCmd(textPtr, interp, objc, objv); break; case TEXT_EDIT: result = TextEditCmd(textPtr, interp, objc, objv); break; case TEXT_GET: { Tcl_Obj *objPtr = NULL; int i, found = 0, visible = 0; CONST char *name; int length; if (objc < 3) { Tcl_WrongNumArgs(interp, 2, objv, "?-displaychars? ?--? index1 ?index2 ...?"); result = TCL_ERROR; goto done; } /* * Simple, restrictive argument parsing. The only options are -- and * -displaychars (or any unique prefix). */ i = 2; if (objc > 3) { name = Tcl_GetStringFromObj(objv[i], &length); if (length > 1 && name[0] == '-') { if (strncmp("-displaychars", name, (unsigned)length)==0) { i++; visible = 1; name = Tcl_GetStringFromObj(objv[i], &length); } if ((i < objc-1) && (length == 2) && !strcmp("--", name)) { i++; } } } for (; i < objc; i += 2) { CONST TkTextIndex *index1Ptr, *index2Ptr; TkTextIndex index2; index1Ptr = TkTextGetIndexFromObj(interp, textPtr, objv[i]); if (index1Ptr == NULL) { if (objPtr) { Tcl_DecrRefCount(objPtr); } result = TCL_ERROR; goto done; } if (i+1 == objc) { TkTextIndexForwChars(NULL, index1Ptr, 1, &index2, COUNT_INDICES); index2Ptr = &index2; } else { index2Ptr = TkTextGetIndexFromObj(interp, textPtr, objv[i+1]); if (index2Ptr == NULL) { if (objPtr) { Tcl_DecrRefCount(objPtr); } result = TCL_ERROR; goto done; } } if (TkTextIndexCmp(index1Ptr, index2Ptr) < 0) { /* * We want to move the text we get from the window into the * result, but since this could in principle be a megabyte or * more, we want to do it efficiently! */ Tcl_Obj *get = TextGetText(textPtr, index1Ptr, index2Ptr, visible); found++; if (found == 1) { Tcl_SetObjResult(interp, get); } else { if (found == 2) { /* * Move the first item we put into the result into the * first element of the list object. */ objPtr = Tcl_NewObj(); Tcl_ListObjAppendElement(NULL, objPtr, Tcl_GetObjResult(interp)); } Tcl_ListObjAppendElement(NULL, objPtr, get); } } } if (found > 1) { Tcl_SetObjResult(interp, objPtr); } break; } case TEXT_IMAGE: result = TkTextImageCmd(textPtr, interp, objc, objv); break; case TEXT_INDEX: { CONST TkTextIndex *indexPtr; if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "index"); result = TCL_ERROR; goto done; } indexPtr = TkTextGetIndexFromObj(interp, textPtr, objv[2]); if (indexPtr == NULL) { result = TCL_ERROR; goto done; } Tcl_SetObjResult(interp, TkTextNewIndexObj(textPtr, indexPtr)); break; } case TEXT_INSERT: { CONST TkTextIndex *indexPtr; if (objc < 4) { Tcl_WrongNumArgs(interp, 2, objv, "index chars ?tagList chars tagList ...?"); result = TCL_ERROR; goto done; } indexPtr = TkTextGetIndexFromObj(interp, textPtr, objv[2]); if (indexPtr == NULL) { result = TCL_ERROR; goto done; } if (textPtr->state == TK_TEXT_STATE_NORMAL) { result = TextInsertCmd(NULL, textPtr, interp, objc-3, objv+3, indexPtr, 1); } break; } case TEXT_MARK: result = TkTextMarkCmd(textPtr, interp, objc, objv); break; case TEXT_PEER: result = TextPeerCmd(textPtr, interp, objc, objv); break; case TEXT_REPLACE: { CONST TkTextIndex *indexFromPtr, *indexToPtr; if (objc < 5) { Tcl_WrongNumArgs(interp, 2, objv, "index1 index2 chars ?tagList chars tagList ...?"); result = TCL_ERROR; goto done; } indexFromPtr = TkTextGetIndexFromObj(interp, textPtr, objv[2]); if (indexFromPtr == NULL) { result = TCL_ERROR; goto done; } indexToPtr = TkTextGetIndexFromObj(interp, textPtr, objv[3]); if (indexToPtr == NULL) { result = TCL_ERROR; goto done; } if (TkTextIndexCmp(indexFromPtr, indexToPtr) > 0) { Tcl_AppendResult(interp, "Index \"", Tcl_GetString(objv[3]), "\" before \"", Tcl_GetString(objv[2]), "\" in the text", NULL); result = TCL_ERROR; goto done; } if (textPtr->state == TK_TEXT_STATE_NORMAL) { int lineNum, byteIndex; TkTextIndex index; /* * The 'replace' operation is quite complex to do correctly, * because we want a number of criteria to hold: * * 1. The insertion point shouldn't move, unless it is within the * deleted range. In this case it should end up after the new * text. * * 2. The window should not change the text it shows - should not * scroll vertically - unless the result of the replace is * that the insertion position which used to be on-screen is * now off-screen. */ byteIndex = textPtr->topIndex.byteIndex; lineNum = TkBTreeLinesTo(textPtr, textPtr->topIndex.linePtr); TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index); if ((TkTextIndexCmp(indexFromPtr, &index) < 0) && (TkTextIndexCmp(indexToPtr, &index) > 0)) { /* * The insertion point is inside the range to be replaced, so * we have to do some calculations to ensure it doesn't move * unnecessarily. */ int deleteInsertOffset, insertLength, j; insertLength = 0; for (j = 4; j < objc; j += 2) { insertLength += Tcl_GetCharLength(objv[j]); } /* * Calculate 'deleteInsertOffset' as an offset we will apply * to the insertion point after this operation. */ deleteInsertOffset = CountIndices(textPtr, indexFromPtr, &index, COUNT_CHARS); if (deleteInsertOffset > insertLength) { deleteInsertOffset = insertLength; } result = TextReplaceCmd(textPtr, interp, indexFromPtr, indexToPtr, objc, objv, 0); if (result == TCL_OK) { /* * Move the insertion position to the correct place. */ TkTextIndexForwChars(NULL, indexFromPtr, deleteInsertOffset, &index, COUNT_INDICES); TkBTreeUnlinkSegment(textPtr->insertMarkPtr, textPtr->insertMarkPtr->body.mark.linePtr); TkBTreeLinkSegment(textPtr->insertMarkPtr, &index); } } else { result = TextReplaceCmd(textPtr, interp, indexFromPtr, indexToPtr, objc, objv, 1); } if (result == TCL_OK) { /* * Now ensure the top-line is in the right place. */ TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineNum, byteIndex, &index); TkTextSetYView(textPtr, &index, TK_TEXT_NOPIXELADJUST); } } break; } case TEXT_SCAN: result = TkTextScanCmd(textPtr, interp, objc, objv); break; case TEXT_SEARCH: result = TextSearchCmd(textPtr, interp, objc, objv); break; case TEXT_SEE: result = TkTextSeeCmd(textPtr, interp, objc, objv); break; case TEXT_TAG: result = TkTextTagCmd(textPtr, interp, objc, objv); break; case TEXT_WINDOW: result = TkTextWindowCmd(textPtr, interp, objc, objv); break; case TEXT_XVIEW: result = TkTextXviewCmd(textPtr, interp, objc, objv); break; case TEXT_YVIEW: result = TkTextYviewCmd(textPtr, interp, objc, objv); break; } done: textPtr->refCount--; if (textPtr->refCount == 0) { ckfree((char *) textPtr); } return result; } /* *-------------------------------------------------------------- * * SharedTextObjCmd -- * * This function is invoked to process commands on the shared portion of * a text widget. Currently it is not actually exported as a Tcl command, * and is only used internally to process parts of undo/redo scripts. * See the user documentation for 'text' for details on what it does - * the only subcommands it currently supports are 'insert' and 'delete'. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation for "text". * *-------------------------------------------------------------- */ static int SharedTextObjCmd( ClientData clientData, /* Information about shared test B-tree. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { register TkSharedText *sharedPtr = (TkSharedText *) clientData; int result = TCL_OK; int index; static CONST char *optionStrings[] = { "delete", "insert", NULL }; enum options { TEXT_DELETE, TEXT_INSERT }; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0, &index) != TCL_OK) { return TCL_ERROR; } switch ((enum options) index) { case TEXT_DELETE: if (objc < 3) { Tcl_WrongNumArgs(interp, 2, objv, "index1 ?index2 ...?"); return TCL_ERROR; } if (objc < 5) { /* * Simple case requires no predetermination of indices. */ TkTextIndex index1; /* * Parse the starting and stopping indices. */ result = TkTextSharedGetObjIndex(interp, sharedPtr, objv[2], &index1); if (result != TCL_OK) { return result; } if (objc == 4) { TkTextIndex index2; result = TkTextSharedGetObjIndex(interp, sharedPtr, objv[3], &index2); if (result != TCL_OK) { return result; } DeleteIndexRange(sharedPtr, NULL, &index1, &index2, 1); } else { DeleteIndexRange(sharedPtr, NULL, &index1, NULL, 1); } return TCL_OK; } else { /* Too many arguments */ return TCL_ERROR; } break; case TEXT_INSERT: { TkTextIndex index1; if (objc < 4) { Tcl_WrongNumArgs(interp, 2, objv, "index chars ?tagList chars tagList ...?"); return TCL_ERROR; } result = TkTextSharedGetObjIndex(interp, sharedPtr, objv[2], &index1); if (result != TCL_OK) { return result; } return TextInsertCmd(sharedPtr, NULL, interp, objc-3, objv+3, &index1, 1); } default: return TCL_OK; } } /* *-------------------------------------------------------------- * * TextPeerCmd -- * * This function is invoked to process the "text peer" Tcl command. See * the user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *-------------------------------------------------------------- */ static int TextPeerCmd( TkText *textPtr, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { Tk_Window tkwin = textPtr->tkwin; int index; static CONST char *peerOptionStrings[] = { "create", "names", NULL }; enum peerOptions { PEER_CREATE, PEER_NAMES }; if (objc < 3) { Tcl_WrongNumArgs(interp, 2, objv, "option ?arg arg ...?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[2], peerOptionStrings, "peer option", 0, &index) != TCL_OK) { return TCL_ERROR; } switch ((enum peerOptions)index) { case PEER_CREATE: if (objc < 4) { Tcl_WrongNumArgs(interp, 3, objv, "pathName ?options?"); return TCL_ERROR; } return CreateWidget(textPtr->sharedTextPtr, tkwin, interp, textPtr, objc-2, objv+2); case PEER_NAMES: { TkText *tPtr = textPtr->sharedTextPtr->peers; if (objc > 3) { Tcl_WrongNumArgs(interp, 3, objv, NULL); return TCL_ERROR; } while (tPtr != NULL) { if (tPtr != textPtr) { Tcl_AppendElement(interp, Tk_PathName(tPtr->tkwin)); } tPtr = tPtr->next; } } } return TCL_OK; } /* *---------------------------------------------------------------------- * * TextReplaceCmd -- * * This function is invoked to process part of the "replace" widget * command for text widgets. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * * If 'viewUpdate' is false, then textPtr->topIndex may no longer be a * valid index after this function returns. The caller is responsible for * ensuring a correct index is in place. * *---------------------------------------------------------------------- */ static int TextReplaceCmd( TkText *textPtr, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ CONST TkTextIndex *indexFromPtr, /* Index from which to replace. */ CONST TkTextIndex *indexToPtr, /* Index to which to replace. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[], /* Argument objects. */ int viewUpdate) /* Update vertical view if set. */ { /* * Perform the deletion and insertion, but ensure no undo-separator is * placed between the two operations. Since we are using the helper * functions 'DeleteIndexRange' and 'TextInsertCmd' we have to pretend * that the autoSeparators setting is off, so that we don't get an * undo-separator between the delete and insert. */ int origAutoSep = textPtr->sharedTextPtr->autoSeparators; int result; if (textPtr->sharedTextPtr->undo) { textPtr->sharedTextPtr->autoSeparators = 0; if (origAutoSep && textPtr->sharedTextPtr->lastEditMode!=TK_TEXT_EDIT_REPLACE) { TkUndoInsertUndoSeparator(textPtr->sharedTextPtr->undoStack); } } DeleteIndexRange(NULL, textPtr, indexFromPtr, indexToPtr, viewUpdate); result = TextInsertCmd(NULL, textPtr, interp, objc-4, objv+4, indexFromPtr, viewUpdate); if (textPtr->sharedTextPtr->undo) { textPtr->sharedTextPtr->lastEditMode = TK_TEXT_EDIT_REPLACE; textPtr->sharedTextPtr->autoSeparators = origAutoSep; } return result; } /* *---------------------------------------------------------------------- * * TextIndexSortProc -- * * This function is called by qsort when sorting an array of indices in * *decreasing* order (last to first). * * Results: * The return value is -1 if the first argument should be before the * second element, 0 if it's equivalent, and 1 if it should be after the * second element. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TextIndexSortProc( CONST void *first, /* Elements to be compared. */ CONST void *second) { TkTextIndex *pair1 = (TkTextIndex *) first; TkTextIndex *pair2 = (TkTextIndex *) second; int cmp = TkTextIndexCmp(&pair1[1], &pair2[1]); if (cmp == 0) { /* * If the first indices were equal, we want the second index of the * pair also to be the greater. Use pointer magic to access the second * index pair. */ cmp = TkTextIndexCmp(&pair1[0], &pair2[0]); } if (cmp > 0) { return -1; } else if (cmp < 0) { return 1; } return 0; } /* *---------------------------------------------------------------------- * * DestroyText -- * * This function is invoked when we receive a destroy event to clean up * the internal structure of a text widget. We will free up most of the * internal structure and delete the associated Tcl command. If there are * no outstanding references to the widget, we also free up the textPtr * itself. * * The widget has already been flagged as deleted. * * Results: * None. * * Side effects: * Either everything or almost everything associated with the text is * freed up. * *---------------------------------------------------------------------- */ static void DestroyText( TkText *textPtr) /* Info about text widget. */ { Tcl_HashSearch search; Tcl_HashEntry *hPtr; TkTextTag *tagPtr; TkSharedText *sharedTextPtr = textPtr->sharedTextPtr; /* * Free up all the stuff that requires special handling. We have already * called let Tk_FreeConfigOptions to handle all the standard * option-related stuff (and so none of that exists when we are called). * Special note: free up display-related information before deleting the * B-tree, since display-related stuff may refer to stuff in the B-tree. */ TkTextFreeDInfo(textPtr); textPtr->dInfoPtr = NULL; /* * Remove ourselves from the peer list. */ if (sharedTextPtr->peers == textPtr) { sharedTextPtr->peers = textPtr->next; } else { TkText *nextPtr = sharedTextPtr->peers; while (nextPtr != NULL) { if (nextPtr->next == textPtr) { nextPtr->next = textPtr->next; break; } nextPtr = nextPtr->next; } } /* * Always clean up the widget-specific tags first. Common tags (i.e. most) * will only be cleaned up when the shared structure is cleaned up. * * We also need to clean up widget-specific marks ('insert', 'current'), * since otherwise marks will never disappear from the B-tree. */ TkTextDeleteTag(textPtr, textPtr->selTagPtr); TkBTreeUnlinkSegment(textPtr->insertMarkPtr, textPtr->insertMarkPtr->body.mark.linePtr); ckfree((char *) textPtr->insertMarkPtr); TkBTreeUnlinkSegment(textPtr->currentMarkPtr, textPtr->currentMarkPtr->body.mark.linePtr); ckfree((char *) textPtr->currentMarkPtr); /* * Now we've cleaned up everything of relevance to us in the B-tree, so we * disassociate outselves from it. * * When the refCount reaches zero, it's time to clean up the shared * portion of the text widget. */ sharedTextPtr->refCount--; if (sharedTextPtr->refCount > 0) { TkBTreeRemoveClient(sharedTextPtr->tree, textPtr); /* * Free up any embedded windows which belong to this widget. */ for (hPtr = Tcl_FirstHashEntry(&sharedTextPtr->windowTable, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { TkTextEmbWindowClient *loop; TkTextSegment *ewPtr = (TkTextSegment *) Tcl_GetHashValue(hPtr); loop = ewPtr->body.ew.clients; if (loop->textPtr == textPtr) { ewPtr->body.ew.clients = loop->next; TkTextWinFreeClient(hPtr, loop); } else { TkTextEmbWindowClient *client = ewPtr->body.ew.clients; client = loop->next; while (client != NULL) { if (client->textPtr == textPtr) { loop->next = client->next; TkTextWinFreeClient(hPtr, client); break; } else { loop = loop->next; } client = loop->next; } } } } else { /* * No need to call 'TkBTreeRemoveClient' first, since this will do * everything in one go, more quickly. */ TkBTreeDestroy(sharedTextPtr->tree); for (hPtr = Tcl_FirstHashEntry(&sharedTextPtr->tagTable, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { tagPtr = (TkTextTag *) Tcl_GetHashValue(hPtr); /* * No need to use 'TkTextDeleteTag' since we've already removed * the B-tree completely. */ TkTextFreeTag(textPtr, tagPtr); } Tcl_DeleteHashTable(&sharedTextPtr->tagTable); for (hPtr = Tcl_FirstHashEntry(&sharedTextPtr->markTable, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { ckfree((char *) Tcl_GetHashValue(hPtr)); } Tcl_DeleteHashTable(&sharedTextPtr->markTable); TkUndoFreeStack(sharedTextPtr->undoStack); Tcl_DeleteHashTable(&sharedTextPtr->windowTable); Tcl_DeleteHashTable(&sharedTextPtr->imageTable); if (sharedTextPtr->bindingTable != NULL) { Tk_DeleteBindingTable(sharedTextPtr->bindingTable); } } if (textPtr->tabArrayPtr != NULL) { ckfree((char *) textPtr->tabArrayPtr); } if (textPtr->insertBlinkHandler != NULL) { Tcl_DeleteTimerHandler(textPtr->insertBlinkHandler); } textPtr->tkwin = NULL; textPtr->refCount--; Tcl_DeleteCommandFromToken(textPtr->interp, textPtr->widgetCmd); if (textPtr->refCount == 0) { ckfree((char *) textPtr); } } /* *---------------------------------------------------------------------- * * ConfigureText -- * * This function is called to process an objv/objc list, plus the Tk * option database, in order to configure (or reconfigure) a text widget. * * Results: * The return value is a standard Tcl result. If TCL_ERROR is returned, * then the interp's result contains an error message. * * Side effects: * Configuration information, such as text string, colors, font, etc. get * set for textPtr; old resources get freed, if there were any. * *---------------------------------------------------------------------- */ static int ConfigureText( Tcl_Interp *interp, /* Used for error reporting. */ register TkText *textPtr, /* Information about widget; may or may not * already have values for some fields. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { Tk_SavedOptions savedOptions; int oldExport = textPtr->exportSelection; int mask = 0; if (Tk_SetOptions(interp, (char *) textPtr, textPtr->optionTable, objc, objv, textPtr->tkwin, &savedOptions, &mask) != TCL_OK) { return TCL_ERROR; } /* * Copy down shared flags. */ textPtr->sharedTextPtr->undo = textPtr->undo; textPtr->sharedTextPtr->maxUndo = textPtr->maxUndo; textPtr->sharedTextPtr->autoSeparators = textPtr->autoSeparators; TkUndoSetDepth(textPtr->sharedTextPtr->undoStack, textPtr->sharedTextPtr->maxUndo); /* * A few other options also need special processing, such as parsing the * geometry and setting the background from a 3-D border. */ Tk_SetBackgroundFromBorder(textPtr->tkwin, textPtr->border); if (mask & TK_TEXT_LINE_RANGE) { int start, end, current; /* * Line start and/or end have been adjusted. We need to validate the * first displayed line and arrange for re-layout. */ TkBTreeClientRangeChanged(textPtr, textPtr->charHeight); if (textPtr->start != NULL) { start = TkBTreeLinesTo(NULL, textPtr->start); } else { start = 0; } if (textPtr->end != NULL) { end = TkBTreeLinesTo(NULL, textPtr->end); } else { end = TkBTreeNumLines(textPtr->sharedTextPtr->tree, NULL); } if (start > end) { Tcl_AppendResult(interp, "-startline must be less than or equal to -endline", NULL); Tk_RestoreSavedOptions(&savedOptions); return TCL_ERROR; } current = TkBTreeLinesTo(NULL, textPtr->topIndex.linePtr); if (current < start || current > end) { TkTextSearch search; TkTextIndex index1, first, last; int selChanged = 0; TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, NULL, start, 0, &index1); TkTextSetYView(textPtr, &index1, 0); /* * We may need to adjust the selection. So we have to check * whether the "sel" tag was applied to anything outside the * current start,end. */ TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, NULL, 0, 0, &first); TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, NULL, TkBTreeNumLines(textPtr->sharedTextPtr->tree, NULL), 0, &last); TkBTreeStartSearch(&first, &last, textPtr->selTagPtr, &search); if (!TkBTreeCharTagged(&first, textPtr->selTagPtr) && !TkBTreeNextTag(&search)) { /* Nothing tagged with "sel" */ } else { int line = TkBTreeLinesTo(NULL, search.curIndex.linePtr); if (line < start) { selChanged = 1; } else { TkTextLine *linePtr = search.curIndex.linePtr; while (TkBTreeNextTag(&search)) { linePtr = search.curIndex.linePtr; } line = TkBTreeLinesTo(NULL, linePtr); if (line >= end) { selChanged = 1; } } } if (selChanged) { /* * Send an event that the selection has changed, and abort any * partial-selections in progress. */ TkTextSelectionEvent(textPtr); textPtr->abortSelections = 1; } } } /* * Don't allow negative spacings. */ if (textPtr->spacing1 < 0) { textPtr->spacing1 = 0; } if (textPtr->spacing2 < 0) { textPtr->spacing2 = 0; } if (textPtr->spacing3 < 0) { textPtr->spacing3 = 0; } /* * Parse tab stops. */ if (textPtr->tabArrayPtr != NULL) { ckfree((char *) textPtr->tabArrayPtr); textPtr->tabArrayPtr = NULL; } if (textPtr->tabOptionPtr != NULL) { textPtr->tabArrayPtr = TkTextGetTabs(interp, textPtr, textPtr->tabOptionPtr); if (textPtr->tabArrayPtr == NULL) { Tcl_AddErrorInfo(interp,"\n (while processing -tabs option)"); Tk_RestoreSavedOptions(&savedOptions); return TCL_ERROR; } } /* * Make sure that configuration options are properly mirrored between the * widget record and the "sel" tags. NOTE: we don't have to free up * information during the mirroring; old information was freed when it was * replaced in the widget record. */ textPtr->selTagPtr->border = textPtr->selBorder; if (textPtr->selTagPtr->borderWidthPtr != textPtr->selBorderWidthPtr) { textPtr->selTagPtr->borderWidthPtr = textPtr->selBorderWidthPtr; textPtr->selTagPtr->borderWidth = textPtr->selBorderWidth; } textPtr->selTagPtr->fgColor = textPtr->selFgColorPtr; textPtr->selTagPtr->affectsDisplay = 0; textPtr->selTagPtr->affectsDisplayGeometry = 0; if ((textPtr->selTagPtr->elideString != NULL) || (textPtr->selTagPtr->tkfont != None) || (textPtr->selTagPtr->justifyString != NULL) || (textPtr->selTagPtr->lMargin1String != NULL) || (textPtr->selTagPtr->lMargin2String != NULL) || (textPtr->selTagPtr->offsetString != NULL) || (textPtr->selTagPtr->rMarginString != NULL) || (textPtr->selTagPtr->spacing1String != NULL) || (textPtr->selTagPtr->spacing2String != NULL) || (textPtr->selTagPtr->spacing3String != NULL) || (textPtr->selTagPtr->tabStringPtr != NULL) || (textPtr->selTagPtr->wrapMode != TEXT_WRAPMODE_NULL)) { textPtr->selTagPtr->affectsDisplay = 1; textPtr->selTagPtr->affectsDisplayGeometry = 1; } if ((textPtr->selTagPtr->border != NULL) || (textPtr->selTagPtr->reliefString != NULL) || (textPtr->selTagPtr->bgStipple != None) || (textPtr->selTagPtr->fgColor != NULL) || (textPtr->selTagPtr->fgStipple != None) || (textPtr->selTagPtr->overstrikeString != NULL) || (textPtr->selTagPtr->underlineString != NULL)) { textPtr->selTagPtr->affectsDisplay = 1; } TkTextRedrawTag(NULL, textPtr, NULL, NULL, textPtr->selTagPtr, 1); /* * Claim the selection if we've suddenly started exporting it and there * are tagged characters. */ if (textPtr->exportSelection && (!oldExport)) { TkTextSearch search; TkTextIndex first, last; TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, 0, 0, &first); TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, TkBTreeNumLines(textPtr->sharedTextPtr->tree, textPtr), 0, &last); TkBTreeStartSearch(&first, &last, textPtr->selTagPtr, &search); if (TkBTreeCharTagged(&first, textPtr->selTagPtr) || TkBTreeNextTag(&search)) { Tk_OwnSelection(textPtr->tkwin, XA_PRIMARY, TkTextLostSelection, (ClientData) textPtr); textPtr->flags |= GOT_SELECTION; } } /* * Account for state changes that would reenable blinking cursor state. */ if (textPtr->flags & GOT_FOCUS) { Tcl_DeleteTimerHandler(textPtr->insertBlinkHandler); textPtr->insertBlinkHandler = (Tcl_TimerToken) NULL; TextBlinkProc((ClientData) textPtr); } /* * Register the desired geometry for the window, and arrange for the * window to be redisplayed. */ if (textPtr->width <= 0) { textPtr->width = 1; } if (textPtr->height <= 0) { textPtr->height = 1; } Tk_FreeSavedOptions(&savedOptions); TextWorldChanged(textPtr, mask); return TCL_OK; } /* *--------------------------------------------------------------------------- * * TextWorldChangedCallback -- * * This function is called when the world has changed in some way and the * widget needs to recompute all its graphics contexts and determine its * new geometry. * * Results: * None. * * Side effects: * Configures all tags in the Text with a empty objc/objv, for the side * effect of causing all the items to recompute their geometry and to be * redisplayed. * *--------------------------------------------------------------------------- */ static void TextWorldChangedCallback( ClientData instanceData) /* Information about widget. */ { TkText *textPtr; textPtr = (TkText *) instanceData; TextWorldChanged(textPtr, TK_TEXT_LINE_GEOMETRY); } /* *--------------------------------------------------------------------------- * * TextWorldChanged -- * * This function is called when the world has changed in some way and the * widget needs to recompute all its graphics contexts and determine its * new geometry. * * Results: * None. * * Side effects: * Configures all tags in the Text with a empty objc/objv, for the side * effect of causing all the items to recompute their geometry and to be * redisplayed. * *--------------------------------------------------------------------------- */ static void TextWorldChanged( TkText *textPtr, /* Information about widget. */ int mask) /* OR'd collection of bits showing what has * changed. */ { Tk_FontMetrics fm; int border; textPtr->charWidth = Tk_TextWidth(textPtr->tkfont, "0", 1); if (textPtr->charWidth <= 0) { textPtr->charWidth = 1; } Tk_GetFontMetrics(textPtr->tkfont, &fm); textPtr->charHeight = fm.linespace; if (textPtr->charHeight <= 0) { textPtr->charHeight = 1; } border = textPtr->borderWidth + textPtr->highlightWidth; Tk_GeometryRequest(textPtr->tkwin, textPtr->width * textPtr->charWidth + 2*textPtr->padX + 2*border, textPtr->height*(fm.linespace+textPtr->spacing1+textPtr->spacing3) + 2*textPtr->padY + 2*border); Tk_SetInternalBorderEx(textPtr->tkwin, border + textPtr->padX, border + textPtr->padX, border + textPtr->padY, border + textPtr->padY); if (textPtr->setGrid) { Tk_SetGrid(textPtr->tkwin, textPtr->width, textPtr->height, textPtr->charWidth, textPtr->charHeight); } else { Tk_UnsetGrid(textPtr->tkwin); } TkTextRelayoutWindow(textPtr, mask); } /* *-------------------------------------------------------------- * * TextEventProc -- * * This function is invoked by the Tk dispatcher on structure changes to * a text. For texts with 3D borders, this function is also invoked for * exposures. * * Results: * None. * * Side effects: * When the window gets deleted, internal structures get cleaned up. * When it gets exposed, it is redisplayed. * *-------------------------------------------------------------- */ static void TextEventProc( ClientData clientData, /* Information about window. */ register XEvent *eventPtr) /* Information about event. */ { register TkText *textPtr = (TkText *) clientData; TkTextIndex index, index2; if (eventPtr->type == Expose) { TkTextRedrawRegion(textPtr, eventPtr->xexpose.x, eventPtr->xexpose.y, eventPtr->xexpose.width, eventPtr->xexpose.height); } else if (eventPtr->type == ConfigureNotify) { if ((textPtr->prevWidth != Tk_Width(textPtr->tkwin)) || (textPtr->prevHeight != Tk_Height(textPtr->tkwin))) { int mask = 0; if (textPtr->prevWidth != Tk_Width(textPtr->tkwin)) { mask = TK_TEXT_LINE_GEOMETRY; } TkTextRelayoutWindow(textPtr, mask); textPtr->prevWidth = Tk_Width(textPtr->tkwin); textPtr->prevHeight = Tk_Height(textPtr->tkwin); } } else if (eventPtr->type == DestroyNotify) { /* * NOTE: we must zero out selBorder, selBorderWidthPtr and * selFgColorPtr: they are duplicates of information in the "sel" tag, * which will be freed up when we delete all tags. Hence we don't want * the automatic config options freeing process to delete them as * well. */ textPtr->selBorder = NULL; textPtr->selBorderWidthPtr = NULL; textPtr->selBorderWidth = 0; textPtr->selFgColorPtr = NULL; if (textPtr->setGrid) { Tk_UnsetGrid(textPtr->tkwin); textPtr->setGrid = 0; } if (!(textPtr->flags & OPTIONS_FREED)) { Tk_FreeConfigOptions((char *) textPtr, textPtr->optionTable, textPtr->tkwin); textPtr->flags |= OPTIONS_FREED; } textPtr->flags |= DESTROYED; /* * Call 'DestroyTest' to handle the deletion for us. The actual * textPtr may still exist after this, if there are some outstanding * references. But we have flagged it as DESTROYED just above, so * nothing will try to make use of it very extensively. */ DestroyText(textPtr); } else if ((eventPtr->type == FocusIn) || (eventPtr->type == FocusOut)) { if (eventPtr->xfocus.detail == NotifyInferior || eventPtr->xfocus.detail == NotifyAncestor || eventPtr->xfocus.detail == NotifyNonlinear) { Tcl_DeleteTimerHandler(textPtr->insertBlinkHandler); if (eventPtr->type == FocusIn) { textPtr->flags |= GOT_FOCUS | INSERT_ON; if (textPtr->insertOffTime != 0) { textPtr->insertBlinkHandler = Tcl_CreateTimerHandler( textPtr->insertOnTime, TextBlinkProc, (ClientData) textPtr); } } else { textPtr->flags &= ~(GOT_FOCUS | INSERT_ON); textPtr->insertBlinkHandler = (Tcl_TimerToken) NULL; } if (textPtr->inactiveSelBorder != textPtr->selBorder) { TkTextRedrawTag(NULL, textPtr, NULL, NULL, textPtr->selTagPtr, 1); } TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index); TkTextIndexForwChars(NULL, &index, 1, &index2, COUNT_INDICES); /* * While we wish to redisplay, no heights have changed, so no need * to call TkTextInvalidateLineMetrics. */ TkTextChanged(NULL, textPtr, &index, &index2); if (textPtr->highlightWidth > 0) { TkTextRedrawRegion(textPtr, 0, 0, textPtr->highlightWidth, textPtr->highlightWidth); } } } } /* *---------------------------------------------------------------------- * * TextCmdDeletedProc -- * * This function is invoked when a widget command is deleted. If the * widget isn't already in the process of being destroyed, this command * destroys it. * * Results: * None. * * Side effects: * The widget is destroyed. * *---------------------------------------------------------------------- */ static void TextCmdDeletedProc( ClientData clientData) /* Pointer to widget record for widget. */ { TkText *textPtr = (TkText *) clientData; Tk_Window tkwin = textPtr->tkwin; /* * This function could be invoked either because the window was destroyed * and the command was then deleted (in which this flag is already set) or * because the command was deleted, and then this function destroys the * widget. */ if (!(textPtr->flags & DESTROYED)) { if (textPtr->setGrid) { Tk_UnsetGrid(textPtr->tkwin); textPtr->setGrid = 0; } textPtr->flags |= DESTROYED; Tk_DestroyWindow(tkwin); } } /* *---------------------------------------------------------------------- * * InsertChars -- * * This function implements most of the functionality of the "insert" * widget command. * * Results: * The length of the inserted string. * * Side effects: * The characters in "stringPtr" get added to the text just before the * character indicated by "indexPtr". * * If 'viewUpdate' is true, we may adjust the window contents' * y-position, and scrollbar setting. * *---------------------------------------------------------------------- */ static int InsertChars( TkSharedText *sharedTextPtr, TkText *textPtr, /* Overall information about text widget. */ TkTextIndex *indexPtr, /* Where to insert new characters. May be * modified if the index is not valid for * insertion (e.g. if at "end"). */ Tcl_Obj *stringPtr, /* Null-terminated string containing new * information to add to text. */ int viewUpdate) /* Update the view if set. */ { int lineIndex, length; TkText *tPtr; int *lineAndByteIndex; int resetViewCount; int pixels[2*PIXEL_CLIENTS]; CONST char *string = Tcl_GetStringFromObj(stringPtr, &length); if (sharedTextPtr == NULL) { sharedTextPtr = textPtr->sharedTextPtr; } /* * Don't allow insertions on the last (dummy) line of the text. This is * the only place in this function where the indexPtr is modified. */ lineIndex = TkBTreeLinesTo(textPtr, indexPtr->linePtr); if (lineIndex == TkBTreeNumLines(sharedTextPtr->tree, textPtr)) { lineIndex--; TkTextMakeByteIndex(sharedTextPtr->tree, textPtr, lineIndex, 1000000, indexPtr); } /* * Notify the display module that lines are about to change, then do the * insertion. If the insertion occurs on the top line of the widget * (textPtr->topIndex), then we have to recompute topIndex after the * insertion, since the insertion could invalidate it. */ resetViewCount = 0; if (sharedTextPtr->refCount > PIXEL_CLIENTS) { lineAndByteIndex = (int *) ckalloc(sizeof(int) * 2 * sharedTextPtr->refCount); } else { lineAndByteIndex = pixels; } for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { lineAndByteIndex[resetViewCount] = -1; if (indexPtr->linePtr == tPtr->topIndex.linePtr) { lineAndByteIndex[resetViewCount] = TkBTreeLinesTo(tPtr, indexPtr->linePtr); lineAndByteIndex[resetViewCount+1] = tPtr->topIndex.byteIndex; if (lineAndByteIndex[resetViewCount+1] > indexPtr->byteIndex) { lineAndByteIndex[resetViewCount+1] += length; } } resetViewCount += 2; } TkTextChanged(sharedTextPtr, NULL, indexPtr, indexPtr); sharedTextPtr->stateEpoch++; TkBTreeInsertChars(sharedTextPtr->tree, indexPtr, string); /* * Push the insertion on the undo stack, and update the modified status of * the widget. */ if (length > 0) { if (sharedTextPtr->undo) { TkTextIndex toIndex; if (sharedTextPtr->autoSeparators && sharedTextPtr->lastEditMode != TK_TEXT_EDIT_INSERT) { TkUndoInsertUndoSeparator(sharedTextPtr->undoStack); } sharedTextPtr->lastEditMode = TK_TEXT_EDIT_INSERT; TkTextIndexForwBytes(textPtr, indexPtr, length, &toIndex); TextPushUndoAction(textPtr, stringPtr, 1, indexPtr, &toIndex); } UpdateDirtyFlag(sharedTextPtr); } resetViewCount = 0; for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { if (lineAndByteIndex[resetViewCount] != -1) { if ((tPtr != textPtr) || viewUpdate) { TkTextIndex newTop; TkTextMakeByteIndex(sharedTextPtr->tree, tPtr, lineAndByteIndex[resetViewCount], 0, &newTop); TkTextIndexForwBytes(tPtr, &newTop, lineAndByteIndex[resetViewCount+1], &newTop); TkTextSetYView(tPtr, &newTop, 0); } } resetViewCount += 2; } if (sharedTextPtr->refCount > PIXEL_CLIENTS) { ckfree((char *) lineAndByteIndex); } /* * Invalidate any selection retrievals in progress. */ for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { tPtr->abortSelections = 1; } /* * For convenience, return the length of the string. */ return length; } /* *---------------------------------------------------------------------- * * TextPushUndoAction -- * * Shared by insert and delete actions. Stores the appropriate scripts * into our undo stack. We will add a single refCount to the 'undoString' * object, so, if it previously had a refCount of zero, the caller should * not free it. * * Results: * None. * * Side effects: * Items pushed onto stack. * *---------------------------------------------------------------------- */ static void TextPushUndoAction( TkText *textPtr, /* Overall information about text widget. */ Tcl_Obj *undoString, /* New text. */ int insert, /* 1 if insert, else delete. */ CONST TkTextIndex *index1Ptr, /* Index describing first location. */ CONST TkTextIndex *index2Ptr) /* Index describing second location. */ { TkUndoSubAtom *iAtom, *dAtom; /* * Create the helpers. */ Tcl_Obj *seeInsertObj = Tcl_NewObj(); Tcl_Obj *markSet1InsertObj = Tcl_NewObj(); Tcl_Obj *markSet2InsertObj = Tcl_NewObj(); Tcl_Obj *insertCmdObj = Tcl_NewObj(); Tcl_Obj *deleteCmdObj = Tcl_NewObj(); /* * Get the index positions. */ Tcl_Obj *index1Obj = TkTextNewIndexObj(NULL, index1Ptr); Tcl_Obj *index2Obj = TkTextNewIndexObj(NULL, index2Ptr); /* * These need refCounts, because they are used more than once below. */ Tcl_IncrRefCount(seeInsertObj); Tcl_IncrRefCount(index1Obj); Tcl_IncrRefCount(index2Obj); Tcl_ListObjAppendElement(NULL, seeInsertObj, Tcl_NewStringObj(Tk_PathName(textPtr->tkwin), -1)); Tcl_ListObjAppendElement(NULL, seeInsertObj, Tcl_NewStringObj("see", 3)); Tcl_ListObjAppendElement(NULL, seeInsertObj, Tcl_NewStringObj("insert", 6)); Tcl_ListObjAppendElement(NULL, markSet1InsertObj, Tcl_NewStringObj(Tk_PathName(textPtr->tkwin), -1)); Tcl_ListObjAppendElement(NULL, markSet1InsertObj, Tcl_NewStringObj("mark", 4)); Tcl_ListObjAppendElement(NULL, markSet1InsertObj, Tcl_NewStringObj("set", 3)); Tcl_ListObjAppendElement(NULL, markSet1InsertObj, Tcl_NewStringObj("insert", 6)); markSet2InsertObj = Tcl_DuplicateObj(markSet1InsertObj); Tcl_ListObjAppendElement(NULL, markSet1InsertObj, index1Obj); Tcl_ListObjAppendElement(NULL, markSet2InsertObj, index2Obj); Tcl_ListObjAppendElement(NULL, insertCmdObj, Tcl_NewStringObj("insert", 6)); Tcl_ListObjAppendElement(NULL, insertCmdObj, index1Obj); /* * Only use of 'undoString' is here. */ Tcl_ListObjAppendElement(NULL, insertCmdObj, undoString); Tcl_ListObjAppendElement(NULL, deleteCmdObj, Tcl_NewStringObj("delete", 6)); Tcl_ListObjAppendElement(NULL, deleteCmdObj, index1Obj); Tcl_ListObjAppendElement(NULL, deleteCmdObj, index2Obj); /* * Note: we don't wish to use textPtr->widgetCmd in these callbacks * because if we delete the textPtr, but peers still exist, we will then * have references to a non-existent Tcl_Command in the undo stack, which * will lead to crashes later. Also, the behaviour of the widget w.r.t. * bindings (%W substitutions) always uses the widget path name, so there * is no good reason the undo stack should do otherwise. * * For the 'insert' and 'delete' actions, we have to register a functional * callback, because these actions are defined to operate on the * underlying data shared by all peers. */ iAtom = TkUndoMakeSubAtom(&TextUndoRedoCallback, (ClientData)textPtr->sharedTextPtr, insertCmdObj, NULL); TkUndoMakeCmdSubAtom(NULL, markSet2InsertObj, iAtom); TkUndoMakeCmdSubAtom(NULL, seeInsertObj, iAtom); dAtom = TkUndoMakeSubAtom(&TextUndoRedoCallback, (ClientData)textPtr->sharedTextPtr, deleteCmdObj, NULL); TkUndoMakeCmdSubAtom(NULL, markSet1InsertObj, dAtom); TkUndoMakeCmdSubAtom(NULL, seeInsertObj, dAtom); Tcl_DecrRefCount(seeInsertObj); Tcl_DecrRefCount(index1Obj); Tcl_DecrRefCount(index2Obj); /* * Depending whether the action is to insert or delete, we provide the * appropriate second and third arguments to TkUndoPushAction. (The first * is the 'actionCommand', and the second the 'revertCommand'). */ if (insert) { TkUndoPushAction(textPtr->sharedTextPtr->undoStack, iAtom, dAtom); } else { TkUndoPushAction(textPtr->sharedTextPtr->undoStack, dAtom, iAtom); } } /* *---------------------------------------------------------------------- * * TextUndoRedoCallback -- * * This function is registered with the generic undo/redo code to handle * 'insert' and 'delete' actions on all text widgets. We cannot perform * those actions on any particular text widget, because that text widget * might have been deleted by the time we get here. * * Results: * A standard Tcl result. * * Side effects: * Will insert or delete text, depending on the first word contained in * objPtr. * *---------------------------------------------------------------------- */ int TextUndoRedoCallback( Tcl_Interp *interp, /* Current interpreter. */ ClientData clientData, /* Passed from undo code, but contains our * shared text data structure. */ Tcl_Obj *objPtr) /* Arguments of a command to be handled by the * shared text data structure. */ { TkSharedText *sharedPtr = (TkSharedText *) clientData; int res, objc; Tcl_Obj **objv; TkText *textPtr; res = Tcl_ListObjGetElements(interp, objPtr, &objc, &objv); if (res != TCL_OK) { return res; } /* * If possible, use a real text widget to perform the undo/redo action * (i.e. insertion or deletion of text). This provides maximum * compatibility with older versions of Tk, in which the user may rename * the text widget to allow capture of undo or redo actions. * * In particular, this sorting of capture is useful in text editors based * on the Tk text widget, which need to know which new text needs * re-coloring. * * It would be better if the text widget provided some other mechanism to * allow capture of this information ("What has just changed in the text * widget?"). What we have here is not entirely satisfactory under all * circumstances. */ textPtr = sharedPtr->peers; while (textPtr != NULL) { if (textPtr->start == NULL && textPtr->end == NULL) { Tcl_Obj *cmdNameObj, *evalObj; evalObj = Tcl_NewObj(); Tcl_IncrRefCount(evalObj); /* * We might wish to use the real, current command-name for the * widget, but this will break any code that has over-ridden the * widget, and is expecting to observe the insert/delete actions * which are caused by undo/redo operations. * * cmdNameObj = Tcl_NewObj(); * Tcl_GetCommandFullName(interp, textPtr->widgetCmd, cmdNameObj); * * While such interception is not explicitly documented as * supported, it does occur, and so until we can provide some * alternative mechanism for such code to do what it needs, we * allow it to take place here. */ cmdNameObj = Tcl_NewStringObj(Tk_PathName(textPtr->tkwin), -1); Tcl_ListObjAppendElement(NULL, evalObj, cmdNameObj); Tcl_ListObjAppendList(NULL, evalObj, objPtr); res = Tcl_EvalObjEx(interp, evalObj, TCL_EVAL_GLOBAL); Tcl_DecrRefCount(evalObj); return res; } textPtr = textPtr->next; } /* * If there's no current text widget which shows everything, then we fall * back on acting directly. This means there is no way to intercept from * the Tcl level. */ return SharedTextObjCmd((ClientData)sharedPtr, interp, objc+1, objv-1); } /* *---------------------------------------------------------------------- * * CountIndices -- * * This function implements most of the functionality of the "count" * widget command. * * Note that 'textPtr' is only used if we need to check for elided * attributes, i.e. if type is COUNT_DISPLAY_INDICES or * COUNT_DISPLAY_CHARS * * Results: * Returns the number of characters in the range. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int CountIndices( CONST TkText *textPtr, /* Overall information about text widget. */ CONST TkTextIndex *indexPtr1, /* Index describing location of first * character to delete. */ CONST TkTextIndex *indexPtr2, /* Index describing location of last character * to delete. NULL means just delete the one * character given by indexPtr1. */ TkTextCountType type) /* The kind of indices to count. */ { /* * Order the starting and stopping indices. */ int compare = TkTextIndexCmp(indexPtr1, indexPtr2); if (compare == 0) { return 0; } else if (compare > 0) { return -TkTextIndexCount(textPtr, indexPtr2, indexPtr1, type); } else { return TkTextIndexCount(textPtr, indexPtr1, indexPtr2, type); } } /* *---------------------------------------------------------------------- * * DeleteIndexRange -- * * This function implements most of the functionality of the "delete" * widget command. * * Results: * Returns a standard Tcl result, currently always TCL_OK. * * Side effects: * Characters and other entities (windows, images) get deleted from the * text. * * If 'viewUpdate' is true, we may adjust the window contents' * y-position, and scrollbar setting. * * If 'viewUpdate' is false, true we can guarantee that textPtr->topIndex * points to a valid TkTextLine after this function returns. However, if * 'viewUpdate' is false, then there is no such guarantee (since * topIndex.linePtr can be garbage). The caller is expected to take * actions to ensure the topIndex is validated before laying out the * window again. * *---------------------------------------------------------------------- */ static int DeleteIndexRange( TkSharedText *sharedTextPtr,/* Shared portion of peer widgets. */ TkText *textPtr, /* Overall information about text widget. */ CONST TkTextIndex *indexPtr1, /* Index describing location of first * character (or other entity) to delete. */ CONST TkTextIndex *indexPtr2, /* Index describing location of last * character (or other entity) to delete. * NULL means just delete the one character * given by indexPtr1. */ int viewUpdate) /* Update vertical view if set. */ { int line1, line2; TkTextIndex index1, index2; TkText *tPtr; int *lineAndByteIndex; int resetViewCount; int pixels[2*PIXEL_CLIENTS]; if (sharedTextPtr == NULL) { sharedTextPtr = textPtr->sharedTextPtr; } /* * Prepare the starting and stopping indices. */ index1 = *indexPtr1; if (indexPtr2 != NULL) { index2 = *indexPtr2; } else { index2 = index1; TkTextIndexForwChars(NULL, &index2, 1, &index2, COUNT_INDICES); } /* * Make sure there's really something to delete. */ if (TkTextIndexCmp(&index1, &index2) >= 0) { return TCL_OK; } /* * The code below is ugly, but it's needed to make sure there is always a * dummy empty line at the end of the text. If the final newline of the * file (just before the dummy line) is being deleted, then back up index * to just before the newline. If there is a newline just before the first * character being deleted, then back up the first index too, so that an * even number of lines gets deleted. Furthermore, remove any tags that * are present on the newline that isn't going to be deleted after all * (this simulates deleting the newline and then adding a "clean" one back * again). Note that index1 and index2 might now be equal again which * means that no text will be deleted but tags might be removed. */ line1 = TkBTreeLinesTo(textPtr, index1.linePtr); line2 = TkBTreeLinesTo(textPtr, index2.linePtr); if (line2 == TkBTreeNumLines(sharedTextPtr->tree, textPtr)) { TkTextTag **arrayPtr; int arraySize, i; TkTextIndex oldIndex2; oldIndex2 = index2; TkTextIndexBackChars(NULL, &oldIndex2, 1, &index2, COUNT_INDICES); line2--; if ((index1.byteIndex == 0) && (line1 != 0)) { TkTextIndexBackChars(NULL, &index1, 1, &index1, COUNT_INDICES); line1--; } arrayPtr = TkBTreeGetTags(&index2, NULL, &arraySize); if (arrayPtr != NULL) { for (i = 0; i < arraySize; i++) { TkBTreeTag(&index2, &oldIndex2, arrayPtr[i], 0); } ckfree((char *) arrayPtr); } } if (line1 < line2) { /* * We are deleting more than one line. For speed, we remove all tags * from the range first. If we don't do this, the code below can (when * there are many tags) grow non-linearly in execution time. */ Tcl_HashSearch search; Tcl_HashEntry *hPtr; int i; for (i=0, hPtr=Tcl_FirstHashEntry(&sharedTextPtr->tagTable, &search); hPtr != NULL; i++, hPtr = Tcl_NextHashEntry(&search)) { TkTextTag *tagPtr = (TkTextTag *) Tcl_GetHashValue(hPtr); TkBTreeTag(&index1, &index2, tagPtr, 0); } /* * Special case for the sel tag which is not in the hash table. We * need to do this once for each peer text widget. */ for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { if (TkBTreeTag(&index1, &index2, tPtr->selTagPtr, 0)) { /* * Send an event that the selection changed. This is * equivalent to: * event generate $textWidget <> */ TkTextSelectionEvent(textPtr); tPtr->abortSelections = 1; } } } /* * Tell the display what's about to happen so it can discard obsolete * display information, then do the deletion. Also, if the deletion * involves the top line on the screen, then we have to reset the view * (the deletion will invalidate textPtr->topIndex). Compute what the new * first character will be, then do the deletion, then reset the view. */ TkTextChanged(sharedTextPtr, NULL, &index1, &index2); resetViewCount = 0; if (sharedTextPtr->refCount > PIXEL_CLIENTS) { lineAndByteIndex = (int *) ckalloc(sizeof(int) * 2 * sharedTextPtr->refCount); } else { lineAndByteIndex = pixels; } for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { int line = 0; int byteIndex = 0; int resetView = 0; if (TkTextIndexCmp(&index2, &tPtr->topIndex) >= 0) { if (TkTextIndexCmp(&index1, &tPtr->topIndex) <= 0) { /* * Deletion range straddles topIndex: use the beginning of the * range as the new topIndex. */ resetView = 1; line = line1; byteIndex = index1.byteIndex; } else if (index1.linePtr == tPtr->topIndex.linePtr) { /* * Deletion range starts on top line but after topIndex. Use * the current topIndex as the new one. */ resetView = 1; line = line1; byteIndex = tPtr->topIndex.byteIndex; } } else if (index2.linePtr == tPtr->topIndex.linePtr) { /* * Deletion range ends on top line but before topIndex. Figure out * what will be the new character index for the character * currently pointed to by topIndex. */ resetView = 1; line = line2; byteIndex = tPtr->topIndex.byteIndex; if (index1.linePtr != index2.linePtr) { byteIndex -= index2.byteIndex; } else { byteIndex -= (index2.byteIndex - index1.byteIndex); } } if (resetView) { lineAndByteIndex[resetViewCount] = line; lineAndByteIndex[resetViewCount+1] = byteIndex; } else { lineAndByteIndex[resetViewCount] = -1; } resetViewCount+=2; } /* * Push the deletion on the undo stack if something was actually deleted. */ if (TkTextIndexCmp(&index1, &index2) < 0) { if (sharedTextPtr->undo) { Tcl_Obj *get; if (sharedTextPtr->autoSeparators && (sharedTextPtr->lastEditMode != TK_TEXT_EDIT_DELETE)) { TkUndoInsertUndoSeparator(sharedTextPtr->undoStack); } sharedTextPtr->lastEditMode = TK_TEXT_EDIT_DELETE; get = TextGetText(textPtr, &index1, &index2, 0); TextPushUndoAction(textPtr, get, 0, &index1, &index2); } UpdateDirtyFlag(sharedTextPtr); sharedTextPtr->stateEpoch++; TkBTreeDeleteIndexRange(sharedTextPtr->tree, &index1, &index2); } resetViewCount = 0; for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { int line = lineAndByteIndex[resetViewCount]; if (line != -1) { int byteIndex = lineAndByteIndex[resetViewCount+1]; if (tPtr == textPtr) { if (viewUpdate) { TkTextMakeByteIndex(sharedTextPtr->tree, textPtr, line, byteIndex, &index1); TkTextSetYView(tPtr, &index1, 0); } } else { TkTextMakeByteIndex(sharedTextPtr->tree, NULL, line, byteIndex, &index1); TkTextSetYView(tPtr, &index1, 0); } } resetViewCount += 2; } if (sharedTextPtr->refCount > PIXEL_CLIENTS) { ckfree((char *) lineAndByteIndex); } if (line1 >= line2) { /* * Invalidate any selection retrievals in progress, assuming we didn't * check for this case above. */ for (tPtr = sharedTextPtr->peers; tPtr != NULL ; tPtr = tPtr->next) { tPtr->abortSelections = 1; } } return TCL_OK; } /* *---------------------------------------------------------------------- * * TextFetchSelection -- * * This function is called back by Tk when the selection is requested by * someone. It returns part or all of the selection in a buffer provided * by the caller. * * Results: * The return value is the number of non-NULL bytes stored at buffer. * Buffer is filled (or partially filled) with a NULL-terminated string * containing part or all of the selection, as given by offset and * maxBytes. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TextFetchSelection( ClientData clientData, /* Information about text widget. */ int offset, /* Offset within selection of first character * to be returned. */ char *buffer, /* Location in which to place selection. */ int maxBytes) /* Maximum number of bytes to place at buffer, * not including terminating NULL * character. */ { register TkText *textPtr = (TkText *) clientData; TkTextIndex eof; int count, chunkSize, offsetInSeg; TkTextSearch search; TkTextSegment *segPtr; if (!textPtr->exportSelection) { return -1; } /* * Find the beginning of the next range of selected text. Note: if the * selection is being retrieved in multiple pieces (offset != 0) and some * modification has been made to the text that affects the selection then * reject the selection request (make 'em start over again). */ if (offset == 0) { TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, 0, 0, &textPtr->selIndex); textPtr->abortSelections = 0; } else if (textPtr->abortSelections) { return 0; } TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, TkBTreeNumLines(textPtr->sharedTextPtr->tree, textPtr), 0, &eof); TkBTreeStartSearch(&textPtr->selIndex, &eof, textPtr->selTagPtr, &search); if (!TkBTreeCharTagged(&textPtr->selIndex, textPtr->selTagPtr)) { if (!TkBTreeNextTag(&search)) { if (offset == 0) { return -1; } else { return 0; } } textPtr->selIndex = search.curIndex; } /* * Each iteration through the outer loop below scans one selected range. * Each iteration through the inner loop scans one segment in the selected * range. */ count = 0; while (1) { /* * Find the end of the current range of selected text. */ if (!TkBTreeNextTag(&search)) { Tcl_Panic("TextFetchSelection couldn't find end of range"); } /* * Copy information from character segments into the buffer until * either we run out of space in the buffer or we get to the end of * this range of text. */ while (1) { if (maxBytes == 0) { goto fetchDone; } segPtr = TkTextIndexToSeg(&textPtr->selIndex, &offsetInSeg); chunkSize = segPtr->size - offsetInSeg; if (chunkSize > maxBytes) { chunkSize = maxBytes; } if (textPtr->selIndex.linePtr == search.curIndex.linePtr) { int leftInRange; leftInRange = search.curIndex.byteIndex - textPtr->selIndex.byteIndex; if (leftInRange < chunkSize) { chunkSize = leftInRange; if (chunkSize <= 0) { break; } } } if ((segPtr->typePtr == &tkTextCharType) && !TkTextIsElided(textPtr, &textPtr->selIndex, NULL)) { memcpy(buffer, segPtr->body.chars + offsetInSeg, (size_t) chunkSize); buffer += chunkSize; maxBytes -= chunkSize; count += chunkSize; } TkTextIndexForwBytes(textPtr, &textPtr->selIndex, chunkSize, &textPtr->selIndex); } /* * Find the beginning of the next range of selected text. */ if (!TkBTreeNextTag(&search)) { break; } textPtr->selIndex = search.curIndex; } fetchDone: *buffer = 0; return count; } /* *---------------------------------------------------------------------- * * TkTextLostSelection -- * * This function is called back by Tk when the selection is grabbed away * from a text widget. On Windows and Mac systems, we want to remember * the selection for the next time the focus enters the window. On Unix, * just remove the "sel" tag from everything in the widget. * * Results: * None. * * Side effects: * The "sel" tag is cleared from the window. * *---------------------------------------------------------------------- */ void TkTextLostSelection( ClientData clientData) /* Information about text widget. */ { register TkText *textPtr = (TkText *) clientData; if (TkpAlwaysShowSelection(textPtr->tkwin)) { TkTextIndex start, end; if (!textPtr->exportSelection) { return; } /* * On Windows and Mac systems, we want to remember the selection for * the next time the focus enters the window. On Unix, just remove the * "sel" tag from everything in the widget. */ TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, 0, 0, &start); TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, TkBTreeNumLines(textPtr->sharedTextPtr->tree, textPtr), 0, &end); TkTextRedrawTag(NULL, textPtr, &start, &end, textPtr->selTagPtr, 1); TkBTreeTag(&start, &end, textPtr->selTagPtr, 0); } /* * Send an event that the selection changed. This is equivalent to: * event generate $textWidget <> */ TkTextSelectionEvent(textPtr); textPtr->flags &= ~GOT_SELECTION; } /* *---------------------------------------------------------------------- * * TkTextSelectionEvent -- * * When anything relevant to the "sel" tag has been changed, call this * function to generate a <> event. * * Results: * None. * * Side effects: * If <> bindings are present, they will trigger. * *---------------------------------------------------------------------- */ void TkTextSelectionEvent( TkText *textPtr) { /* * Send an event that the selection changed. This is equivalent to: * event generate $textWidget <> */ XEvent event; memset(&event, 0, sizeof(event)); event.xany.type = VirtualEvent; event.xany.serial = NextRequest(Tk_Display(textPtr->tkwin)); event.xany.send_event = False; event.xany.window = Tk_WindowId(textPtr->tkwin); event.xany.display = Tk_Display(textPtr->tkwin); ((XVirtualEvent *) &event)->name = Tk_GetUid("Selection"); Tk_HandleEvent(&event); } /* *---------------------------------------------------------------------- * * TextBlinkProc -- * * This function is called as a timer handler to blink the insertion * cursor off and on. * * Results: * None. * * Side effects: * The cursor gets turned on or off, redisplay gets invoked, and this * function reschedules itself. * *---------------------------------------------------------------------- */ static void TextBlinkProc( ClientData clientData) /* Pointer to record describing text. */ { register TkText *textPtr = (TkText *) clientData; TkTextIndex index; int x, y, w, h, charWidth; if ((textPtr->state == TK_TEXT_STATE_DISABLED) || !(textPtr->flags & GOT_FOCUS) || (textPtr->insertOffTime == 0)) { if ((textPtr->insertOffTime == 0) && !(textPtr->flags & INSERT_ON)) { /* * The widget was configured to have zero offtime while the * insertion point was not displayed. We have to display it once. */ textPtr->flags |= INSERT_ON; goto redrawInsert; } return; } if (textPtr->flags & INSERT_ON) { textPtr->flags &= ~INSERT_ON; textPtr->insertBlinkHandler = Tcl_CreateTimerHandler( textPtr->insertOffTime, TextBlinkProc, (ClientData) textPtr); } else { textPtr->flags |= INSERT_ON; textPtr->insertBlinkHandler = Tcl_CreateTimerHandler( textPtr->insertOnTime, TextBlinkProc, (ClientData) textPtr); } redrawInsert: TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index); if (TkTextIndexBbox(textPtr, &index, &x, &y, &w, &h, &charWidth) == 0) { if (textPtr->insertCursorType) { /* Block cursor */ TkTextRedrawRegion(textPtr, x - textPtr->width / 2, y, charWidth + textPtr->insertWidth / 2, h); } else { /* I-beam cursor */ TkTextRedrawRegion(textPtr, x - textPtr->insertWidth / 2, y, textPtr->insertWidth, h); } } } /* *---------------------------------------------------------------------- * * TextInsertCmd -- * * This function is invoked to process the "insert" and "replace" widget * commands for text widgets. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * * If 'viewUpdate' is true, we may adjust the window contents' * y-position, and scrollbar setting. * *---------------------------------------------------------------------- */ static int TextInsertCmd( TkSharedText *sharedTextPtr,/* Shared portion of peer widgets. */ TkText *textPtr, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[], /* Argument objects. */ CONST TkTextIndex *indexPtr,/* Index at which to insert. */ int viewUpdate) /* Update the view if set. */ { TkTextIndex index1, index2; int j; if (sharedTextPtr == NULL) { sharedTextPtr = textPtr->sharedTextPtr; } index1 = *indexPtr; for (j = 0; j < objc; j += 2) { /* * Here we rely on this call to modify index1 if it is outside the * acceptable range. In particular, if index1 is "end", it must be set * to the last allowable index for insertion, otherwise subsequent tag * insertions will fail. */ int length = InsertChars(sharedTextPtr, textPtr, &index1, objv[j], viewUpdate); if (objc > (j+1)) { Tcl_Obj **tagNamePtrs; TkTextTag **oldTagArrayPtr; int numTags; TkTextIndexForwBytes(textPtr, &index1, length, &index2); oldTagArrayPtr = TkBTreeGetTags(&index1, NULL, &numTags); if (oldTagArrayPtr != NULL) { int i; for (i = 0; i < numTags; i++) { TkBTreeTag(&index1, &index2, oldTagArrayPtr[i], 0); } ckfree((char *) oldTagArrayPtr); } if (Tcl_ListObjGetElements(interp, objv[j+1], &numTags, &tagNamePtrs) != TCL_OK) { return TCL_ERROR; } else { int i; for (i = 0; i < numTags; i++) { CONST char *strTag = Tcl_GetString(tagNamePtrs[i]); TkBTreeTag(&index1, &index2, TkTextCreateTag(textPtr, strTag, NULL), 1); } index1 = index2; } } } return TCL_OK; } /* *---------------------------------------------------------------------- * * TextSearchCmd -- * * This function is invoked to process the "search" widget command for * text widgets. See the user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ static int TextSearchCmd( TkText *textPtr, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { int i, argsLeft, code; SearchSpec searchSpec; static CONST char *switchStrings[] = { "--", "-all", "-backwards", "-count", "-elide", "-exact", "-forwards", "-hidden", "-nocase", "-nolinestop", "-overlap", "-regexp", "-strictlimits", NULL }; enum SearchSwitches { SEARCH_END, SEARCH_ALL, SEARCH_BACK, SEARCH_COUNT, SEARCH_ELIDE, SEARCH_EXACT, SEARCH_FWD, SEARCH_HIDDEN, SEARCH_NOCASE, SEARCH_NOLINESTOP, SEARCH_OVERLAP, SEARCH_REGEXP, SEARCH_STRICTLIMITS }; /* * Set up the search specification, including the last 4 fields which are * text widget specific. */ searchSpec.exact = 1; searchSpec.noCase = 0; searchSpec.all = 0; searchSpec.backwards = 0; searchSpec.varPtr = NULL; searchSpec.countPtr = NULL; searchSpec.resPtr = NULL; searchSpec.searchElide = 0; searchSpec.noLineStop = 0; searchSpec.overlap = 0; searchSpec.strictLimits = 0; searchSpec.numLines = TkBTreeNumLines(textPtr->sharedTextPtr->tree, textPtr); searchSpec.clientData = (ClientData)textPtr; searchSpec.addLineProc = &TextSearchAddNextLine; searchSpec.foundMatchProc = &TextSearchFoundMatch; searchSpec.lineIndexProc = &TextSearchGetLineIndex; /* * Parse switches and other arguments. */ for (i=2 ; i= objc-1) { Tcl_SetResult(interp, "no value given for \"-count\" option", TCL_STATIC); return TCL_ERROR; } i++; /* * Assumption objv[i] isn't going to disappear on us during this * function, which is fair. */ searchSpec.varPtr = objv[i]; break; case SEARCH_ELIDE: case SEARCH_HIDDEN: searchSpec.searchElide = 1; break; case SEARCH_EXACT: searchSpec.exact = 1; break; case SEARCH_FWD: searchSpec.backwards = 0; break; case SEARCH_NOCASE: searchSpec.noCase = 1; break; case SEARCH_NOLINESTOP: searchSpec.noLineStop = 1; break; case SEARCH_OVERLAP: searchSpec.overlap = 1; break; case SEARCH_STRICTLIMITS: searchSpec.strictLimits = 1; break; case SEARCH_REGEXP: searchSpec.exact = 0; break; default: Tcl_Panic("unexpected switch fallthrough"); } } endOfSwitchProcessing: argsLeft = objc - (i+2); if ((argsLeft != 0) && (argsLeft != 1)) { Tcl_WrongNumArgs(interp, 2, objv, "?switches? pattern index ?stopIndex?"); return TCL_ERROR; } if (searchSpec.noLineStop && searchSpec.exact) { Tcl_SetResult(interp, "the \"-nolinestop\" option requires the " "\"-regexp\" option to be present", TCL_STATIC); return TCL_ERROR; } if (searchSpec.overlap && !searchSpec.all) { Tcl_SetResult(interp, "the \"-overlap\" option requires the " "\"-all\" option to be present", TCL_STATIC); return TCL_ERROR; } /* * Scan through all of the lines of the text circularly, starting at the * given index. 'objv[i]' is the pattern which may be an exact string or a * regexp pattern depending on the flags set above. */ code = SearchPerform(interp, &searchSpec, objv[i], objv[i+1], (argsLeft == 1 ? objv[i+2] : NULL)); if (code != TCL_OK) { goto cleanup; } /* * Set the '-count' variable, if given. */ if (searchSpec.varPtr != NULL && searchSpec.countPtr != NULL) { Tcl_IncrRefCount(searchSpec.countPtr); if (Tcl_ObjSetVar2(interp, searchSpec.varPtr, NULL, searchSpec.countPtr, TCL_LEAVE_ERR_MSG) == NULL) { code = TCL_ERROR; goto cleanup; } } /* * Set the result. */ if (searchSpec.resPtr != NULL) { Tcl_SetObjResult(interp, searchSpec.resPtr); searchSpec.resPtr = NULL; } cleanup: if (searchSpec.countPtr != NULL) { Tcl_DecrRefCount(searchSpec.countPtr); } if (searchSpec.resPtr != NULL) { Tcl_DecrRefCount(searchSpec.resPtr); } return code; } /* *---------------------------------------------------------------------- * * TextSearchGetLineIndex -- * * Extract a row, text offset index position from an objPtr * * This means we ignore any embedded windows/images and elidden text * (unless we are searching that). * * Results: * Standard Tcl error code (with a message in the interpreter on error * conditions). * * The offset placed in offsetPosPtr is a utf-8 char* byte index for * exact searches, and a Unicode character index for regexp searches. * * The line number should start at zero (searches which wrap around * assume the first line is numbered 0). * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TextSearchGetLineIndex( Tcl_Interp *interp, /* For error messages. */ Tcl_Obj *objPtr, /* Contains a textual index like "1.2" */ SearchSpec *searchSpecPtr, /* Contains other search parameters. */ int *linePosPtr, /* For returning the line number. */ int *offsetPosPtr) /* For returning the text offset in the * line. */ { CONST TkTextIndex *indexPtr; int line; TkText *textPtr = (TkText *) searchSpecPtr->clientData; indexPtr = TkTextGetIndexFromObj(interp, textPtr, objPtr); if (indexPtr == NULL) { return TCL_ERROR; } line = TkBTreeLinesTo(textPtr, indexPtr->linePtr); if (line >= searchSpecPtr->numLines) { TkTextLine *linePtr; int count = 0; TkTextSegment *segPtr; line = searchSpecPtr->numLines-1; linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, line); /* * Count the number of bytes in this line. */ for (segPtr=linePtr->segPtr ; segPtr!=NULL ; segPtr=segPtr->nextPtr) { count += segPtr->size; } *offsetPosPtr = TextSearchIndexInLine(searchSpecPtr, linePtr, count); } else { *offsetPosPtr = TextSearchIndexInLine(searchSpecPtr, indexPtr->linePtr, indexPtr->byteIndex); } *linePosPtr = line; return TCL_OK; } /* *---------------------------------------------------------------------- * * TextSearchIndexInLine -- * * Find textual index of 'byteIndex' in the searchable characters of * 'linePtr'. * * This means we ignore any embedded windows/images and elidden text * (unless we are searching that). * * Results: * The returned index is a utf-8 char* byte index for exact searches, and * a Unicode character index for regexp searches. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TextSearchIndexInLine( CONST SearchSpec *searchSpecPtr, /* Search parameters. */ TkTextLine *linePtr, /* The line we're looking at. */ int byteIndex) /* Index into the line. */ { TkTextSegment *segPtr; TkTextIndex curIndex; int index, leftToScan; TkText *textPtr = (TkText *) searchSpecPtr->clientData; index = 0; curIndex.tree = textPtr->sharedTextPtr->tree; curIndex.linePtr = linePtr; curIndex.byteIndex = 0; for (segPtr = linePtr->segPtr, leftToScan = byteIndex; leftToScan > 0; curIndex.byteIndex += segPtr->size, segPtr = segPtr->nextPtr) { if ((segPtr->typePtr == &tkTextCharType) && (searchSpecPtr->searchElide || !TkTextIsElided(textPtr, &curIndex, NULL))) { if (leftToScan < segPtr->size) { if (searchSpecPtr->exact) { index += leftToScan; } else { index += Tcl_NumUtfChars(segPtr->body.chars, leftToScan); } } else if (searchSpecPtr->exact) { index += segPtr->size; } else { index += Tcl_NumUtfChars(segPtr->body.chars, -1); } } leftToScan -= segPtr->size; } return index; } /* *---------------------------------------------------------------------- * * TextSearchAddNextLine -- * * Adds a line from the text widget to the object 'theLine'. * * Results: * A pointer to the TkTextLine corresponding to the given line, or NULL * if there was no available line. * * Also 'lenPtr' (if non-NULL) is filled in with the total length of * 'theLine' (not just what we added to it, but the length including what * was already in there). This is in bytes for an exact search and in * chars for a regexp search. * * Also 'extraLinesPtr' (if non-NULL) will have its value incremented by * 1 for each additional logical line we have added because a newline is * elided (this will only ever happen if we have chosen not to search * elided text, of course). * * Side effects: * Memory may be allocated or re-allocated for theLine's string * representation. * *---------------------------------------------------------------------- */ static ClientData TextSearchAddNextLine( int lineNum, /* Line we must add. */ SearchSpec *searchSpecPtr, /* Search parameters. */ Tcl_Obj *theLine, /* Object to append to. */ int *lenPtr, /* For returning the total length. */ int *extraLinesPtr) /* If non-NULL, will have its value * incremented by the number of additional * logical lines which are merged into this * one by newlines being elided. */ { TkTextLine *linePtr, *thisLinePtr; TkTextIndex curIndex; TkTextSegment *segPtr; TkText *textPtr = (TkText *) searchSpecPtr->clientData; int nothingYet = 1; /* * Extract the text from the line. */ linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, lineNum); if (linePtr == NULL) { return NULL; } curIndex.tree = textPtr->sharedTextPtr->tree; thisLinePtr = linePtr; while (thisLinePtr != NULL) { int elideWraps = 0; curIndex.linePtr = thisLinePtr; curIndex.byteIndex = 0; for (segPtr = thisLinePtr->segPtr; segPtr != NULL; curIndex.byteIndex += segPtr->size, segPtr = segPtr->nextPtr) { if (!searchSpecPtr->searchElide && TkTextIsElided(textPtr, &curIndex, NULL)) { /* * If we reach the end of the logical line, and if we have at * least one character in the string, then we continue * wrapping to the next logical line. If there are no * characters yet, then the entire line of characters is * elided and there's no need to complicate matters by * wrapping - we'll look at the next line in due course. */ if (segPtr->nextPtr == NULL && !nothingYet) { elideWraps = 1; } continue; } if (segPtr->typePtr != &tkTextCharType) { continue; } Tcl_AppendToObj(theLine, segPtr->body.chars, segPtr->size); nothingYet = 0; } if (!elideWraps) { break; } lineNum++; if (lineNum >= searchSpecPtr->numLines) { break; } thisLinePtr = TkBTreeNextLine(textPtr, thisLinePtr); if (thisLinePtr != NULL && extraLinesPtr != NULL) { /* * Tell our caller we have an extra line merged in. */ *extraLinesPtr = (*extraLinesPtr) + 1; } } /* * If we're ignoring case, convert the line to lower case. There is no * need to do this for regexp searches, since they handle a flag for this * purpose. */ if (searchSpecPtr->exact && searchSpecPtr->noCase) { Tcl_SetObjLength(theLine, Tcl_UtfToLower(Tcl_GetString(theLine))); } if (lenPtr != NULL) { if (searchSpecPtr->exact) { Tcl_GetStringFromObj(theLine, lenPtr); } else { *lenPtr = Tcl_GetCharLength(theLine); } } return (ClientData)linePtr; } /* *---------------------------------------------------------------------- * * TextSearchFoundMatch -- * * Stores information from a successful search. * * Results: * 1 if the information was stored, 0 if the position at which the match * was found actually falls outside the allowable search region (and * therefore the search is actually complete). * * Side effects: * Memory may be allocated in the 'countPtr' and 'resPtr' fields of * 'searchSpecPtr'. Each of those objects will have refCount zero and * must eventually be freed or stored elsewhere as appropriate. * *---------------------------------------------------------------------- */ static int TextSearchFoundMatch( int lineNum, /* Line on which match was found. */ SearchSpec *searchSpecPtr, /* Search parameters. */ ClientData clientData, /* Token returned by the 'addNextLineProc', * TextSearchAddNextLine. May be NULL, in * which we case we must generate it (from * lineNum). */ Tcl_Obj *theLine, /* Text from current line, only accessed for * exact searches, and is allowed to be NULL * for regexp searches. */ int matchOffset, /* Offset of found item in utf-8 bytes for * exact search, Unicode chars for regexp. */ int matchLength) /* Length also in bytes/chars as per search * type. */ { int numChars; int leftToScan; TkTextIndex curIndex, foundIndex; TkTextSegment *segPtr; TkTextLine *linePtr; TkText *textPtr = (TkText *) searchSpecPtr->clientData; if (lineNum == searchSpecPtr->stopLine) { /* * If the current index is on the wrong side of the stopIndex, then * the item we just found is actually outside the acceptable range, * and the search is over. */ if (searchSpecPtr->backwards ^ (matchOffset >= searchSpecPtr->stopOffset)) { return 0; } } /* * Calculate the character count, which may need augmenting if there are * embedded windows or elidden text. */ if (searchSpecPtr->exact) { CONST char *startOfLine = Tcl_GetString(theLine); numChars = Tcl_NumUtfChars(startOfLine + matchOffset, matchLength); } else { numChars = matchLength; } /* * If we're using strict limits checking, ensure that the match with its * full length fits inside the given range. */ if (searchSpecPtr->strictLimits && lineNum == searchSpecPtr->stopLine) { if (searchSpecPtr->backwards ^ ((matchOffset + numChars) > searchSpecPtr->stopOffset)) { return 0; } } /* * The index information returned by the regular expression parser only * considers textual information: it doesn't account for embedded windows, * elided text (when we are not searching elided text) or any other * non-textual info. Scan through the line's segments again to adjust both * matchChar and matchCount. * * We will walk through the segments of this line until we have either * reached the end of the match or we have reached the end of the line. */ linePtr = (TkTextLine *)clientData; if (linePtr == NULL) { linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, lineNum); } curIndex.tree = textPtr->sharedTextPtr->tree; /* * Find the starting point. */ leftToScan = matchOffset; while (1) { curIndex.linePtr = linePtr; curIndex.byteIndex = 0; /* * Note that we allow leftToScan to be zero because we want to skip * over any preceding non-textual items. */ for (segPtr = linePtr->segPtr; leftToScan >= 0 && segPtr; segPtr = segPtr->nextPtr) { if (segPtr->typePtr != &tkTextCharType) { matchOffset += segPtr->size; } else if (!searchSpecPtr->searchElide && TkTextIsElided(textPtr, &curIndex, NULL)) { if (searchSpecPtr->exact) { matchOffset += segPtr->size; } else { matchOffset += Tcl_NumUtfChars(segPtr->body.chars, -1); } } else { leftToScan -= segPtr->size; } curIndex.byteIndex += segPtr->size; } if (segPtr == NULL && leftToScan >= 0) { /* * This will only happen if we are eliding newlines. */ linePtr = TkBTreeNextLine(textPtr, linePtr); if (linePtr == NULL) { /* * If we reach the end of the text, we have a serious problem, * unless there's actually nothing left to look for. */ if (leftToScan == 0) { break; } else { Tcl_Panic("Reached end of text in a match"); } } /* * We've wrapped to the beginning of the next logical line, which * has been merged with the previous one whose newline was elided. */ lineNum++; matchOffset = 0; } else { break; } } /* * Calculate and store the found index in the result. */ if (searchSpecPtr->exact) { TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineNum, matchOffset, &foundIndex); } else { TkTextMakeCharIndex(textPtr->sharedTextPtr->tree, textPtr, lineNum, matchOffset, &foundIndex); } if (searchSpecPtr->all) { if (searchSpecPtr->resPtr == NULL) { searchSpecPtr->resPtr = Tcl_NewObj(); } Tcl_ListObjAppendElement(NULL, searchSpecPtr->resPtr, TkTextNewIndexObj(textPtr, &foundIndex)); } else { searchSpecPtr->resPtr = TkTextNewIndexObj(textPtr, &foundIndex); } /* * Find the end point. Here 'leftToScan' could be negative already as a * result of the above loop if the segment we reached spanned the start of * the string. When we add matchLength it will become non-negative. */ for (leftToScan += matchLength; leftToScan > 0; curIndex.byteIndex += segPtr->size, segPtr = segPtr->nextPtr) { if (segPtr == NULL) { /* * We are on the next line - this of course should only ever * happen with searches which have matched across multiple lines. */ linePtr = TkBTreeNextLine(textPtr, linePtr); segPtr = linePtr->segPtr; curIndex.linePtr = linePtr; curIndex.byteIndex = 0; } if (segPtr->typePtr != &tkTextCharType) { /* * Anything we didn't count in the search needs adding. */ numChars += segPtr->size; continue; } else if (!searchSpecPtr->searchElide && TkTextIsElided(textPtr, &curIndex, NULL)) { numChars += Tcl_NumUtfChars(segPtr->body.chars, -1); continue; } if (searchSpecPtr->exact) { leftToScan -= segPtr->size; } else { leftToScan -= Tcl_NumUtfChars(segPtr->body.chars, -1); } } /* * Now store the count result, if it is wanted. */ if (searchSpecPtr->varPtr != NULL) { Tcl_Obj *tmpPtr = Tcl_NewIntObj(numChars); if (searchSpecPtr->all) { if (searchSpecPtr->countPtr == NULL) { searchSpecPtr->countPtr = Tcl_NewObj(); } Tcl_ListObjAppendElement(NULL, searchSpecPtr->countPtr, tmpPtr); } else { searchSpecPtr->countPtr = tmpPtr; } } return 1; } /* *---------------------------------------------------------------------- * * TkTextGetTabs -- * * Parses a string description of a set of tab stops. * * Results: * The return value is a pointer to a malloc'ed structure holding parsed * information about the tab stops. If an error occurred then the return * value is NULL and an error message is left in the interp's result. * * Side effects: * Memory is allocated for the structure that is returned. It is up to * the caller to free this structure when it is no longer needed. * *---------------------------------------------------------------------- */ TkTextTabArray * TkTextGetTabs( Tcl_Interp *interp, /* Used for error reporting. */ TkText *textPtr, /* Information about the text widget. */ Tcl_Obj *stringPtr) /* Description of the tab stops. See the text * manual entry for details. */ { int objc, i, count; Tcl_Obj **objv; TkTextTabArray *tabArrayPtr; TkTextTab *tabPtr; Tcl_UniChar ch; double prevStop, lastStop; /* * Map these strings to TkTextTabAlign values. */ static CONST char *tabOptionStrings[] = { "left", "right", "center", "numeric", NULL }; if (Tcl_ListObjGetElements(interp, stringPtr, &objc, &objv) != TCL_OK) { return NULL; } /* * First find out how many entries we need to allocate in the tab array. */ count = 0; for (i = 0; i < objc; i++) { char c = Tcl_GetString(objv[i])[0]; if ((c != 'l') && (c != 'r') && (c != 'c') && (c != 'n')) { count++; } } /* * Parse the elements of the list one at a time to fill in the array. */ tabArrayPtr = (TkTextTabArray *) ckalloc((unsigned) (sizeof(TkTextTabArray) + (count-1)*sizeof(TkTextTab))); tabArrayPtr->numTabs = 0; prevStop = 0.0; lastStop = 0.0; for (i = 0, tabPtr = &tabArrayPtr->tabs[0]; i < objc; i++, tabPtr++) { int index; /* * This will round fractional pixels above 0.5 upwards, and otherwise * downwards, to find the right integer pixel position. */ if (Tk_GetPixelsFromObj(interp, textPtr->tkwin, objv[i], &tabPtr->location) != TCL_OK) { goto error; } if (tabPtr->location <= 0) { Tcl_AppendResult(interp, "tab stop \"", Tcl_GetString(objv[i]), "\" is not at a positive distance", NULL); goto error; } prevStop = lastStop; if (Tk_GetMMFromObj(interp, textPtr->tkwin, objv[i], &lastStop) != TCL_OK) { goto error; } lastStop *= WidthOfScreen(Tk_Screen(textPtr->tkwin)); lastStop /= WidthMMOfScreen(Tk_Screen(textPtr->tkwin)); if (i > 0 && (tabPtr->location <= (tabPtr-1)->location)) { /* * This tab is actually to the left of the previous one, which is * illegal. */ #ifdef _TK_ALLOW_DECREASING_TABS /* * Force the tab to be a typical character width to the right of * the previous one, and update the 'lastStop' with the changed * position. */ if (textPtr->charWidth > 0) { tabPtr->location = (tabPtr-1)->location + textPtr->charWidth; } else { tabPtr->location = (tabPtr-1)->location + 8; } lastStop = tabPtr->location; #else Tcl_AppendResult(interp, "tabs must be monotonically increasing, but \"", Tcl_GetString(objv[i]), "\" is smaller than or equal to the previous tab", NULL); goto error; #endif /* _TK_ALLOW_DECREASING_TABS */ } tabArrayPtr->numTabs++; /* * See if there is an explicit alignment in the next list element. * Otherwise just use "left". */ tabPtr->alignment = LEFT; if ((i+1) == objc) { continue; } /* * There may be a more efficient way of getting this. */ Tcl_UtfToUniChar(Tcl_GetString(objv[i+1]), &ch); if (!Tcl_UniCharIsAlpha(ch)) { continue; } i += 1; if (Tcl_GetIndexFromObj(interp, objv[i], tabOptionStrings, "tab alignment", 0, &index) != TCL_OK) { goto error; } tabPtr->alignment = ((TkTextTabAlign)index); } /* * For when we need to interpolate tab stops, store these two so we know * the tab stop size to very high precision. With the above checks, we can * guarantee that tabIncrement is strictly positive here. */ tabArrayPtr->lastTab = lastStop; tabArrayPtr->tabIncrement = lastStop - prevStop; return tabArrayPtr; error: ckfree((char *) tabArrayPtr); return NULL; } /* *---------------------------------------------------------------------- * * TextDumpCmd -- * * Return information about the text, tags, marks, and embedded windows * and images in a text widget. See the man page for the description of * the text dump operation for all the details. * * Results: * A standard Tcl result. * * Side effects: * Memory is allocated for the result, if needed (standard Tcl result * side effects). * *---------------------------------------------------------------------- */ static int TextDumpCmd( register TkText *textPtr, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. Someone else has already * parsed this command enough to know that * objv[1] is "dump". */ { TkTextIndex index1, index2; int arg; int lineno; /* Current line number. */ int what = 0; /* bitfield to select segment types. */ int atEnd; /* True if dumping up to logical end. */ TkTextLine *linePtr; Tcl_Obj *command = NULL; /* Script callback to apply to segments. */ #define TK_DUMP_TEXT 0x1 #define TK_DUMP_MARK 0x2 #define TK_DUMP_TAG 0x4 #define TK_DUMP_WIN 0x8 #define TK_DUMP_IMG 0x10 #define TK_DUMP_ALL (TK_DUMP_TEXT|TK_DUMP_MARK|TK_DUMP_TAG| \ TK_DUMP_WIN|TK_DUMP_IMG) static CONST char *optStrings[] = { "-all", "-command", "-image", "-mark", "-tag", "-text", "-window", NULL }; enum opts { DUMP_ALL, DUMP_CMD, DUMP_IMG, DUMP_MARK, DUMP_TAG, DUMP_TXT, DUMP_WIN }; for (arg=2 ; arg < objc ; arg++) { int index; if (Tcl_GetString(objv[arg])[0] != '-') { break; } if (Tcl_GetIndexFromObj(interp, objv[arg], optStrings, "option", 0, &index) != TCL_OK) { return TCL_ERROR; } switch ((enum opts) index) { case DUMP_ALL: what = TK_DUMP_ALL; break; case DUMP_TXT: what |= TK_DUMP_TEXT; break; case DUMP_TAG: what |= TK_DUMP_TAG; break; case DUMP_MARK: what |= TK_DUMP_MARK; break; case DUMP_IMG: what |= TK_DUMP_IMG; break; case DUMP_WIN: what |= TK_DUMP_WIN; break; case DUMP_CMD: arg++; if (arg >= objc) { Tcl_AppendResult(interp, "Usage: ", Tcl_GetString(objv[0]), " dump ?-all -image -text -mark -tag -window? ", "?-command script? index ?index2?", NULL); return TCL_ERROR; } command = objv[arg]; break; default: Tcl_Panic("unexpected switch fallthrough"); } } if (arg >= objc || arg+2 < objc) { Tcl_AppendResult(interp, "Usage: ", Tcl_GetString(objv[0]), " dump ?-all -image -text -mark -tag -window? ", "?-command script? index ?index2?", NULL); return TCL_ERROR; } if (what == 0) { what = TK_DUMP_ALL; } if (TkTextGetObjIndex(interp, textPtr, objv[arg], &index1) != TCL_OK) { return TCL_ERROR; } arg++; atEnd = 0; if (objc == arg) { TkTextIndexForwChars(NULL, &index1, 1, &index2, COUNT_INDICES); } else { int length; char *str; if (TkTextGetObjIndex(interp, textPtr, objv[arg], &index2) != TCL_OK) { return TCL_ERROR; } str = Tcl_GetStringFromObj(objv[arg], &length); if (strncmp(str, "end", (unsigned)length) == 0) { atEnd = 1; } } if (TkTextIndexCmp(&index1, &index2) >= 0) { return TCL_OK; } lineno = TkBTreeLinesTo(textPtr, index1.linePtr); if (index1.linePtr == index2.linePtr) { DumpLine(interp, textPtr, what, index1.linePtr, index1.byteIndex, index2.byteIndex, lineno, command); } else { int textChanged; int lineend = TkBTreeLinesTo(textPtr, index2.linePtr); int endByteIndex = index2.byteIndex; textChanged = DumpLine(interp, textPtr, what, index1.linePtr, index1.byteIndex, 32000000, lineno, command); if (textChanged) { if (textPtr->flags & DESTROYED) { return TCL_OK; } linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, lineno); textChanged = 0; } else { linePtr = index1.linePtr; } while ((linePtr = TkBTreeNextLine(textPtr, linePtr)) != NULL) { lineno++; if (lineno == lineend) { break; } textChanged = DumpLine(interp, textPtr, what, linePtr, 0, 32000000, lineno, command); if (textChanged) { if (textPtr->flags & DESTROYED) { return TCL_OK; } linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, lineno); textChanged = 0; } } if (linePtr != NULL) { DumpLine(interp, textPtr, what, linePtr, 0, endByteIndex, lineno, command); if (textPtr->flags & DESTROYED) { return TCL_OK; } } } /* * Special case to get the leftovers hiding at the end mark. */ if (atEnd) { if (textPtr->flags & DESTROYED) { return TCL_OK; } /* * Re-get the end index, in case it has changed. */ if (TkTextGetObjIndex(interp, textPtr, objv[arg], &index2) != TCL_OK) { return TCL_ERROR; } DumpLine(interp, textPtr, what & ~TK_DUMP_TEXT, index2.linePtr, 0, 1, lineno, command); } return TCL_OK; } /* *---------------------------------------------------------------------- * * DumpLine * * Return information about a given text line from character position * "start" up to, but not including, "end". * * Results: * Returns 1 if the command callback made any changes to the text widget * which will have invalidated internal structures such as TkTextSegment, * TkTextIndex, pointers. Our caller can then take action to recompute * such entities. Returns 0 otherwise. * * Side effects: * None, but see DumpSegment which can have arbitrary side-effects * *---------------------------------------------------------------------- */ static int DumpLine( Tcl_Interp *interp, TkText *textPtr, int what, /* Bit flags to select segment types. */ TkTextLine *linePtr, /* The current line. */ int startByte, int endByte, /* Byte range to dump. */ int lineno, /* Line number for indices dump. */ Tcl_Obj *command) /* Script to apply to the segment. */ { TkTextSegment *segPtr; TkTextIndex index; int offset = 0, textChanged = 0; /* * Must loop through line looking at its segments. * character * toggleOn, toggleOff * mark * image * window */ segPtr = linePtr->segPtr; while ((offset < endByte) && (segPtr != NULL)) { int lineChanged = 0; int currentSize = segPtr->size; if ((what & TK_DUMP_TEXT) && (segPtr->typePtr == &tkTextCharType) && (offset + segPtr->size > startByte)) { int last = segPtr->size; /* Index of last char in seg. */ int first = 0; /* Index of first char in seg. */ if (offset + segPtr->size > endByte) { last = endByte - offset; } if (startByte > offset) { first = startByte - offset; } if (last != segPtr->size) { /* * To avoid modifying the string in place we copy over just * the segment that we want. Since DumpSegment can modify the * text, we could not confidently revert the modification * here. */ int length = last - first; char *range = ckalloc((length + 1) * sizeof(char)); memcpy(range, segPtr->body.chars + first, length * sizeof(char)); range[length] = '\0'; TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset + first, &index); lineChanged = DumpSegment(textPtr, interp, "text", range, command, &index, what); ckfree(range); } else { TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset + first, &index); lineChanged = DumpSegment(textPtr, interp, "text", segPtr->body.chars + first, command, &index, what); } } else if ((offset >= startByte)) { if ((what & TK_DUMP_MARK) && (segPtr->typePtr->name[0] == 'm')) { char *name; TkTextMark *markPtr = (TkTextMark *) &segPtr->body; if (segPtr == textPtr->insertMarkPtr) { name = "insert"; } else if (segPtr == textPtr->currentMarkPtr) { name = "current"; } else { name = Tcl_GetHashKey(&textPtr->sharedTextPtr->markTable, markPtr->hPtr); } TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset, &index); lineChanged = DumpSegment(textPtr, interp, "mark", name, command, &index, what); } else if ((what & TK_DUMP_TAG) && (segPtr->typePtr == &tkTextToggleOnType)) { TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset, &index); lineChanged = DumpSegment(textPtr, interp, "tagon", segPtr->body.toggle.tagPtr->name, command, &index, what); } else if ((what & TK_DUMP_TAG) && (segPtr->typePtr == &tkTextToggleOffType)) { TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset, &index); lineChanged = DumpSegment(textPtr, interp, "tagoff", segPtr->body.toggle.tagPtr->name, command, &index, what); } else if ((what & TK_DUMP_IMG) && (segPtr->typePtr->name[0] == 'i')) { TkTextEmbImage *eiPtr = (TkTextEmbImage *)&segPtr->body; char *name = (eiPtr->name == NULL) ? "" : eiPtr->name; TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset, &index); lineChanged = DumpSegment(textPtr, interp, "image", name, command, &index, what); } else if ((what & TK_DUMP_WIN) && (segPtr->typePtr->name[0] == 'w')) { TkTextEmbWindow *ewPtr = (TkTextEmbWindow *)&segPtr->body; char *pathname; if (ewPtr->tkwin == (Tk_Window) NULL) { pathname = ""; } else { pathname = Tk_PathName(ewPtr->tkwin); } TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineno, offset, &index); lineChanged = DumpSegment(textPtr, interp, "window", pathname, command, &index, what); } } offset += currentSize; if (lineChanged) { TkTextSegment *newSegPtr; int newOffset = 0; textChanged = 1; /* * Our indices are no longer valid. */ if (textPtr->flags & DESTROYED) { return textChanged; } linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, textPtr, lineno); newSegPtr = linePtr->segPtr; if (segPtr == newSegPtr) { segPtr = segPtr->nextPtr; } else { while ((newOffset < endByte) && (newOffset < offset) && (newSegPtr != NULL)) { newOffset += segPtr->size; newSegPtr = newSegPtr->nextPtr; if (segPtr == newSegPtr) { break; } } if (segPtr != newSegPtr && newOffset == offset && currentSize == 0) { TkTextSegment *searchPtr = newSegPtr; while (searchPtr != NULL && searchPtr->size == 0) { if (searchPtr == segPtr) { newSegPtr = searchPtr; break; } searchPtr = searchPtr->nextPtr; } } segPtr = newSegPtr; if (segPtr != NULL) { segPtr = segPtr->nextPtr; } } } else { segPtr = segPtr->nextPtr; } } return textChanged; } /* *---------------------------------------------------------------------- * * DumpSegment * * Either append information about the current segment to the result, or * make a script callback with that information as arguments. * * Results: * Returns 1 if the command callback made any changes to the text widget * which will have invalidated internal structures such as TkTextSegment, * TkTextIndex, pointers. Our caller can then take action to recompute * such entities. Returns 0 otherwise. * * Side effects: * Either evals the callback or appends elements to the result string. * The callback can have arbitrary side-effects. * *---------------------------------------------------------------------- */ static int DumpSegment( TkText *textPtr, Tcl_Interp *interp, CONST char *key, /* Segment type key. */ CONST char *value, /* Segment value. */ Tcl_Obj *command, /* Script callback. */ CONST TkTextIndex *index, /* index with line/byte position info. */ int what) /* Look for TK_DUMP_INDEX bit. */ { char buffer[TK_POS_CHARS]; TkTextPrintIndex(textPtr, index, buffer); if (command == NULL) { Tcl_AppendElement(interp, key); Tcl_AppendElement(interp, value); Tcl_AppendElement(interp, buffer); return 0; } else { CONST char *argv[4]; char *list; int oldStateEpoch = TkBTreeEpoch(textPtr->sharedTextPtr->tree); argv[0] = key; argv[1] = value; argv[2] = buffer; argv[3] = NULL; list = Tcl_Merge(3, argv); Tcl_VarEval(interp, Tcl_GetString(command), " ", list, NULL); ckfree(list); if ((textPtr->flags & DESTROYED) || TkBTreeEpoch(textPtr->sharedTextPtr->tree) != oldStateEpoch) { return 1; } else { return 0; } } } /* *---------------------------------------------------------------------- * * TextEditUndo -- * * Undo the last change. * * Results: * None. * * Side effects: * Apart from manipulating the undo and redo stacks, the state of the * rest of the widget may also change (due to whatever is being undone). * *---------------------------------------------------------------------- */ static int TextEditUndo( TkText *textPtr) /* Overall information about text widget. */ { int status; if (!textPtr->sharedTextPtr->undo) { return TCL_OK; } /* * Turn off the undo feature while we revert a compound action. Note that * the dirty counter counts backwards while we are undoing... */ textPtr->sharedTextPtr->undo = 0; textPtr->sharedTextPtr->isDirtyIncrement = -1; status = TkUndoRevert(textPtr->sharedTextPtr->undoStack); textPtr->sharedTextPtr->isDirtyIncrement = 1; textPtr->sharedTextPtr->undo = 1; return status; } /* *---------------------------------------------------------------------- * * TextEditRedo -- * * Redo the last undone change. * * Results: * None. * * Side effects: * Apart from manipulating the undo and redo stacks, the state of the * rest of the widget may also change (due to whatever is being redone). * *---------------------------------------------------------------------- */ static int TextEditRedo( TkText *textPtr) /* Overall information about text widget. */ { int status; if (!textPtr->sharedTextPtr->undo) { return TCL_OK; } /* * Turn off the undo feature temporarily while we revert a previously * undone compound action. */ textPtr->sharedTextPtr->undo = 0; status = TkUndoApply(textPtr->sharedTextPtr->undoStack); textPtr->sharedTextPtr->undo = 1; return status; } /* *---------------------------------------------------------------------- * * TextEditCmd -- * * Handle the subcommands to "$text edit ...". See documentation for * details. * * Results: * None * * Side effects: * None. * *---------------------------------------------------------------------- */ static int TextEditCmd( TkText *textPtr, /* Information about text widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { int index; static CONST char *editOptionStrings[] = { "modified", "redo", "reset", "separator", "undo", NULL }; enum editOptions { EDIT_MODIFIED, EDIT_REDO, EDIT_RESET, EDIT_SEPARATOR, EDIT_UNDO }; if (objc < 3) { Tcl_WrongNumArgs(interp, 2, objv, "option ?arg arg ...?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[2], editOptionStrings, "edit option", 0, &index) != TCL_OK) { return TCL_ERROR; } switch ((enum editOptions) index) { case EDIT_MODIFIED: if (objc == 3) { Tcl_SetObjResult(interp, Tcl_NewBooleanObj(textPtr->sharedTextPtr->isDirty)); } else if (objc != 4) { Tcl_WrongNumArgs(interp, 3, objv, "?boolean?"); return TCL_ERROR; } else { int setModified; XEvent event; if (Tcl_GetBooleanFromObj(interp, objv[3], &setModified) != TCL_OK) { return TCL_ERROR; } /* * Set or reset the dirty info and trigger a Modified event. */ if (setModified) { textPtr->sharedTextPtr->isDirty = 1; textPtr->sharedTextPtr->modifiedSet = 1; } else { textPtr->sharedTextPtr->isDirty = 0; textPtr->sharedTextPtr->modifiedSet = 0; } /* * Send an event that the text was modified. This is equivalent to * "event generate $textWidget <>" */ memset(&event, 0, sizeof(event)); event.xany.type = VirtualEvent; event.xany.serial = NextRequest(Tk_Display(textPtr->tkwin)); event.xany.send_event = False; event.xany.window = Tk_WindowId(textPtr->tkwin); event.xany.display = Tk_Display(textPtr->tkwin); ((XVirtualEvent *) &event)->name = Tk_GetUid("Modified"); Tk_HandleEvent(&event); } break; case EDIT_REDO: if (objc != 3) { Tcl_WrongNumArgs(interp, 3, objv, NULL); return TCL_ERROR; } if (TextEditRedo(textPtr)) { Tcl_AppendResult(interp, "nothing to redo", NULL); return TCL_ERROR; } break; case EDIT_RESET: if (objc != 3) { Tcl_WrongNumArgs(interp, 3, objv, NULL); return TCL_ERROR; } TkUndoClearStacks(textPtr->sharedTextPtr->undoStack); break; case EDIT_SEPARATOR: if (objc != 3) { Tcl_WrongNumArgs(interp, 3, objv, NULL); return TCL_ERROR; } TkUndoInsertUndoSeparator(textPtr->sharedTextPtr->undoStack); break; case EDIT_UNDO: if (objc != 3) { Tcl_WrongNumArgs(interp, 3, objv, NULL); return TCL_ERROR; } if (TextEditUndo(textPtr)) { Tcl_AppendResult(interp, "nothing to undo", NULL); return TCL_ERROR; } break; } return TCL_OK; } /* *---------------------------------------------------------------------- * * TextGetText -- * * Returns the text from indexPtr1 to indexPtr2, placing that text in a * string object which is returned with a refCount of zero. * * Since the amount of text may potentially be several megabytes (e.g. * in text editors built on the text widget), efficiency is very * important. We may want to investigate the efficiency of the * Tcl_AppendToObj more carefully (e.g. if we know we are going to be * appending several thousand lines, we could attempt to pre-allocate a * larger space). * * Also the result is built up as a utf-8 string, but, if we knew we * wanted it as Unicode, we could potentially save a huge conversion by * building it up as Unicode directly. This could be as simple as * replacing Tcl_NewObj by Tcl_NewUnicodeObj. * * Results: * Tcl_Obj of string type containing the specified text. If the * visibleOnly flag is set to 1, then only those characters which are not * elided will be returned. Otherwise (flag is 0) all characters in the * given range are returned. * * Side effects: * Memory will be allocated for the new object. Remember to free it if it * isn't going to be stored appropriately. * *---------------------------------------------------------------------- */ static Tcl_Obj * TextGetText( CONST TkText *textPtr, /* Information about text widget. */ CONST TkTextIndex *indexPtr1, /* Get text from this index... */ CONST TkTextIndex *indexPtr2, /* ...to this index. */ int visibleOnly) /* If non-zero, then only return non-elided * characters. */ { TkTextIndex tmpIndex; Tcl_Obj *resultPtr = Tcl_NewObj(); TkTextMakeByteIndex(indexPtr1->tree, textPtr, TkBTreeLinesTo(textPtr, indexPtr1->linePtr), indexPtr1->byteIndex, &tmpIndex); if (TkTextIndexCmp(indexPtr1, indexPtr2) < 0) { while (1) { int offset, last; TkTextSegment *segPtr; segPtr = TkTextIndexToSeg(&tmpIndex, &offset); last = segPtr->size; if (tmpIndex.linePtr == indexPtr2->linePtr) { /* * The last line that was requested must be handled carefully, * because we may need to break out of this loop in the middle * of the line. */ if (indexPtr2->byteIndex == tmpIndex.byteIndex) { break; } else { int last2 = indexPtr2->byteIndex - tmpIndex.byteIndex + offset; if (last2 < last) { last = last2; } } } if (segPtr->typePtr == &tkTextCharType) { if (!visibleOnly || !TkTextIsElided(textPtr,&tmpIndex,NULL)) { Tcl_AppendToObj(resultPtr, segPtr->body.chars + offset, last - offset); } } TkTextIndexForwBytes(textPtr, &tmpIndex, last-offset, &tmpIndex); } } return resultPtr; } /* *---------------------------------------------------------------------- * * UpdateDirtyFlag -- * * Increases the dirtyness of the text widget * * Results: * None * * Side effects: * None. * *---------------------------------------------------------------------- */ static void UpdateDirtyFlag( TkSharedText *sharedTextPtr)/* Information about text widget. */ { int oldDirtyFlag; if (sharedTextPtr->modifiedSet) { return; } oldDirtyFlag = sharedTextPtr->isDirty; sharedTextPtr->isDirty += sharedTextPtr->isDirtyIncrement; if (sharedTextPtr->isDirty == 0 || oldDirtyFlag == 0) { TkText *textPtr; for (textPtr = sharedTextPtr->peers; textPtr != NULL; textPtr = textPtr->next) { /* * Send an event that the text was modified. This is equivalent to * event generate $textWidget <> */ XEvent event; memset(&event, 0, sizeof(event)); event.xany.type = VirtualEvent; event.xany.serial = NextRequest(Tk_Display(textPtr->tkwin)); event.xany.send_event = False; event.xany.window = Tk_WindowId(textPtr->tkwin); event.xany.display = Tk_Display(textPtr->tkwin); ((XVirtualEvent *) &event)->name = Tk_GetUid("Modified"); Tk_HandleEvent(&event); } } } /* *---------------------------------------------------------------------- * * SearchPerform -- * * Overall control of search process. Is given a pattern, a starting * index and an ending index, and attempts to perform a search. This * function is actually completely independent of Tk, and could in the * future be split off. * * Results: * Standard Tcl result code. In particular, if fromPtr or toPtr are not * considered valid by the 'lineIndexProc', an error will be thrown and * no search performed. * * Side effects: * See 'SearchCore'. * *---------------------------------------------------------------------- */ static int SearchPerform( Tcl_Interp *interp, /* For error messages. */ SearchSpec *searchSpecPtr, /* Search parameters. */ Tcl_Obj *patObj, /* Contains an exact string or a regexp * pattern. Must have a refCount > 0. */ Tcl_Obj *fromPtr, /* Contains information describing the first * index. */ Tcl_Obj *toPtr) /* NULL or information describing the last * index. */ { /* * Find the starting line and starting offset (measured in Unicode chars * for regexp search, utf-8 bytes for exact search). */ if ((*searchSpecPtr->lineIndexProc)(interp, fromPtr, searchSpecPtr, &searchSpecPtr->startLine, &searchSpecPtr->startOffset) != TCL_OK) { return TCL_ERROR; } /* * Find the optional end location, similarly. */ if (toPtr != NULL) { CONST TkTextIndex *indexToPtr, *indexFromPtr; TkText *textPtr = (TkText *) searchSpecPtr->clientData; indexToPtr = TkTextGetIndexFromObj(interp, textPtr, toPtr); if (indexToPtr == NULL) { return TCL_ERROR; } indexFromPtr = TkTextGetIndexFromObj(interp, textPtr, fromPtr); /* * Check for any empty search range here. It might be better in the * future to embed that in SearchCore (whose default behaviour is to * wrap when given a negative search range). */ if (searchSpecPtr->backwards) { if (TkTextIndexCmp(indexFromPtr, indexToPtr) == -1) { return TCL_OK; } } else { if (TkTextIndexCmp(indexFromPtr, indexToPtr) == 1) { return TCL_OK; } } if ((*searchSpecPtr->lineIndexProc)(interp, toPtr, searchSpecPtr, &searchSpecPtr->stopLine, &searchSpecPtr->stopOffset) != TCL_OK) { return TCL_ERROR; } } else { searchSpecPtr->stopLine = -1; } /* * Scan through all of the lines of the text circularly, starting at the * given index. 'patObj' is the pattern which may be an exact string or a * regexp pattern depending on the flags in searchSpecPtr. */ return SearchCore(interp, searchSpecPtr, patObj); } /* *---------------------------------------------------------------------- * * SearchCore -- * * The core of the search function. This function is actually completely * independent of Tk, and could in the future be split off. * * The function assumes regexp-based searches operate on Unicode strings, * and exact searches on utf-8 strings. Therefore the 'foundMatchProc' * and 'addLineProc' need to be aware of this distinction. * * Results: * Standard Tcl result code. * * Side effects: * Only those of the 'searchSpecPtr->foundMatchProc' which is called * whenever a match is found. * * Note that the way matching across multiple lines is implemented, we * start afresh with each line we have available, even though we may * already have examined the contents of that line (and further ones) if * we were attempting a multi-line match using the previous line. This * means there may be ways to speed this up a lot by not throwing away * all the multi-line information one has accumulated. Profiling should * be done to see where the bottlenecks lie before attempting this, * however. We would also need to be very careful such optimisation keep * within the specified search bounds. * *---------------------------------------------------------------------- */ static int SearchCore( Tcl_Interp *interp, /* For error messages. */ SearchSpec *searchSpecPtr, /* Search parameters. */ Tcl_Obj *patObj) /* Contains an exact string or a regexp * pattern. Must have a refCount > 0. */ { /* * For exact searches these are utf-8 char* offsets, for regexp searches * they are Unicode char offsets. */ int firstOffset, lastOffset, matchOffset, matchLength; int passes; int lineNum = searchSpecPtr->startLine; int code = TCL_OK; Tcl_Obj *theLine; int alreadySearchOffset = -1; CONST char *pattern = NULL; /* For exact searches only. */ int firstNewLine = -1; /* For exact searches only. */ Tcl_RegExp regexp = NULL; /* For regexp searches only. */ /* * These items are for backward regexp searches only. They are for two * purposes: to allow us to report backwards matches in the correct order, * even though the implementation uses repeated forward searches; and to * provide for overlap checking between backwards matches on different * text lines. */ #define LOTS_OF_MATCHES 20 int matchNum = LOTS_OF_MATCHES; int smArray[2 * LOTS_OF_MATCHES]; int *storeMatch = smArray; int *storeLength = smArray + LOTS_OF_MATCHES; int lastBackwardsLineMatch = -1; int lastBackwardsMatchOffset = -1; if (searchSpecPtr->exact) { /* * Convert the pattern to lower-case if we're supposed to ignore case. */ if (searchSpecPtr->noCase) { patObj = Tcl_DuplicateObj(patObj); /* * This can change the length of the string behind the object's * back, so ensure it is correctly synchronised. */ Tcl_SetObjLength(patObj, Tcl_UtfToLower(Tcl_GetString(patObj))); } } else { /* * Compile the regular expression. We want '^$' to match after and * before \n respectively, so use the TCL_REG_NLANCH flag. */ regexp = Tcl_GetRegExpFromObj(interp, patObj, (searchSpecPtr->noCase ? TCL_REG_NOCASE : 0) | (searchSpecPtr->noLineStop ? 0 : TCL_REG_NLSTOP) | TCL_REG_ADVANCED | TCL_REG_CANMATCH | TCL_REG_NLANCH); if (regexp == NULL) { return TCL_ERROR; } } /* * For exact strings, we want to know where the first newline is, and we * will also use this as a flag to test whether it is even possible to * match the pattern on a single line. If not we will have to search * across multiple lines. */ if (searchSpecPtr->exact) { CONST char *nl; /* * We only need to set the matchLength once for exact searches, and we * do it here. It is also used below as the actual pattern length, so * it has dual purpose. */ pattern = Tcl_GetStringFromObj(patObj, &matchLength); nl = strchr(pattern, '\n'); /* * If there is no newline, or it is the very end of the string, then * we don't need any special treatment, since single-line matching * will work fine. */ if (nl != NULL && nl[1] != '\0') { firstNewLine = (nl - pattern); } } else { matchLength = 0; /* Only needed to prevent compiler warnings. */ } /* * Keep a reference here, so that we can be sure the object doesn't * disappear behind our backs and invalidate its contents which we are * using. */ Tcl_IncrRefCount(patObj); /* * For building up the current line being checked. */ theLine = Tcl_NewObj(); Tcl_IncrRefCount(theLine); for (passes = 0; passes < 2; ) { ClientData lineInfo; int linesSearched = 1; int extraLinesSearched = 0; if (lineNum >= searchSpecPtr->numLines) { /* * Don't search the dummy last line of the text. */ goto nextLine; } /* * Extract the text from the line, storing its length in 'lastOffset' * (in bytes if exact, chars if regexp), since obviously the length is * the maximum offset at which it is possible to find something on * this line, which is what 'lastOffset' represents. */ lineInfo = (*searchSpecPtr->addLineProc)(lineNum, searchSpecPtr, theLine, &lastOffset, &linesSearched); if (lineInfo == NULL) { /* * This should not happen, since 'lineNum' should be valid in the * call above. However, let's try to be flexible and not cause a * crash below. */ goto nextLine; } if (lineNum == searchSpecPtr->stopLine && searchSpecPtr->backwards) { firstOffset = searchSpecPtr->stopOffset; } else { firstOffset = 0; } if (alreadySearchOffset != -1) { if (searchSpecPtr->backwards) { if (alreadySearchOffset < lastOffset) { lastOffset = alreadySearchOffset; } } else { if (alreadySearchOffset > firstOffset) { firstOffset = alreadySearchOffset; } } alreadySearchOffset = -1; } if (lineNum == searchSpecPtr->startLine) { /* * The starting line is tricky: the first time we see it we check * one part of the line, and the second pass through we check the * other part of the line. */ passes++; if ((passes == 1) ^ searchSpecPtr->backwards) { /* * Forward search and first pass, or backward search and * second pass. * * Only use the last part of the line. */ if (searchSpecPtr->startOffset > firstOffset) { firstOffset = searchSpecPtr->startOffset; } if ((firstOffset >= lastOffset) && ((lastOffset != 0) || searchSpecPtr->exact)) { goto nextLine; } } else { /* * Use only the first part of the line. */ if (searchSpecPtr->startOffset < lastOffset) { lastOffset = searchSpecPtr->startOffset; } } } /* * Check for matches within the current line 'lineNum'. If so, and if * we're searching backwards or for all matches, repeat the search * until we find the last match in the line. The 'lastOffset' is one * beyond the last position in the line at which a match is allowed to * begin. */ matchOffset = -1; if (searchSpecPtr->exact) { int maxExtraLines = 0; CONST char *startOfLine = Tcl_GetString(theLine); do { Tcl_UniChar ch; CONST char *p; int lastFullLine = lastOffset; if (firstNewLine == -1) { if (searchSpecPtr->strictLimits && (firstOffset + matchLength > lastOffset)) { /* * Not enough characters to match. */ break; } /* * Single line matching. We want to scan forwards or * backwards as appropriate. */ if (searchSpecPtr->backwards) { /* * Search back either from the previous match or from * 'startOfLine + lastOffset - 1' until we find a * match. */ CONST char c = pattern[0]; if (alreadySearchOffset != -1) { p = startOfLine + alreadySearchOffset; alreadySearchOffset = -1; } else { p = startOfLine + lastOffset -1; } while (p >= startOfLine + firstOffset) { if (p[0] == c && !strncmp(p, pattern, (unsigned)matchLength)) { goto backwardsMatch; } p--; } break; } else { p = strstr(startOfLine + firstOffset, pattern); } if (p == NULL) { /* * Single line match failed. */ break; } } else if (firstNewLine >= (lastOffset - firstOffset)) { /* * Multi-line match, but not enough characters to match. */ break; } else { /* * Multi-line match has only one possible match position, * because we know where the '\n' is. */ p = startOfLine + lastOffset - firstNewLine - 1; if (strncmp(p, pattern, (unsigned)(firstNewLine + 1))) { /* * No match. */ break; } else { int extraLines = 1; /* * If we find a match that overlaps more than one * line, we will use this value to determine the first * allowed starting offset for the following search * (to avoid overlapping results). */ int lastTotal = lastOffset; int skipFirst = lastOffset - firstNewLine -1; /* * We may be able to match if given more text. The * following 'while' block handles multi-line exact * searches. */ while (1) { lastFullLine = lastTotal; if (lineNum+extraLines>=searchSpecPtr->numLines) { p = NULL; break; } /* * Only add the line if we haven't already done so * already. */ if (extraLines > maxExtraLines) { if ((*searchSpecPtr->addLineProc)(lineNum + extraLines, searchSpecPtr, theLine, &lastTotal, &extraLines) == NULL) { p = NULL; if (!searchSpecPtr->backwards) { extraLinesSearched = extraLines; } break; } maxExtraLines = extraLines; } startOfLine = Tcl_GetString(theLine); p = startOfLine + skipFirst; /* * Use the fact that 'matchLength = patLength' for * exact searches. */ if ((lastTotal - skipFirst) >= matchLength) { /* * We now have enough text to match, so we * make a final test and break whatever the * result. */ if (strncmp(p,pattern,(unsigned)matchLength)) { p = NULL; } break; } else { /* * Not enough text yet, but check the prefix. */ if (strncmp(p, pattern, (unsigned)(lastTotal - skipFirst))) { p = NULL; break; } /* * The prefix matches, so keep looking. */ } extraLines++; } /* * If we reach here, with p != NULL, we've found a * multi-line match, else we started a multi-match but * didn't finish it off, so we go to the next line. */ if (p == NULL) { break; } /* * We've found a multi-line match. */ if (extraLines > 0) { extraLinesSearched = extraLines - 1; } } } backwardsMatch: if ((p - startOfLine) >= lastOffset) { break; } /* * Remember the match. */ matchOffset = p - startOfLine; if (searchSpecPtr->all && !(*searchSpecPtr->foundMatchProc)(lineNum, searchSpecPtr, lineInfo, theLine, matchOffset, matchLength)) { /* * We reached the end of the search. */ goto searchDone; } if (!searchSpecPtr->overlap) { if (searchSpecPtr->backwards) { alreadySearchOffset = p - startOfLine; if (firstNewLine != -1) { break; } else { alreadySearchOffset -= matchLength; } } else { firstOffset = p - startOfLine + matchLength; if (firstOffset >= lastOffset) { /* * Now, we have to be careful not to find * overlapping matches either on the same or * following lines. Assume that if we did find * something, it goes until the last extra line we * added. * * We can break out of the loop, since we know no * more will be found. */ if (!searchSpecPtr->backwards) { alreadySearchOffset = firstOffset - lastFullLine; break; } } } } else { if (searchSpecPtr->backwards) { alreadySearchOffset = p - startOfLine - 1; if (alreadySearchOffset < 0) { break; } } else { firstOffset = p - startOfLine + Tcl_UtfToUniChar(startOfLine+matchOffset,&ch); } } } while (searchSpecPtr->all); } else { int maxExtraLines = 0; int matches = 0; int lastNonOverlap = -1; do { Tcl_RegExpInfo info; int match; int lastFullLine = lastOffset; match = Tcl_RegExpExecObj(interp, regexp, theLine, firstOffset, 1, (firstOffset>0 ? TCL_REG_NOTBOL : 0)); if (match < 0) { code = TCL_ERROR; goto searchDone; } Tcl_RegExpGetInfo(regexp, &info); /* * If we don't have a match, or if we do, but it extends to * the end of the line, we must try to add more lines to get a * full greedy match. */ if (!match || ((info.extendStart == info.matches[0].start) && (info.matches[0].end == lastOffset-firstOffset))) { int extraLines = 0; int prevFullLine; /* * If we find a match that overlaps more than one line, we * will use this value to determine the first allowed * starting offset for the following search (to avoid * overlapping results). */ int lastTotal = lastOffset; if ((lastBackwardsLineMatch != -1) && (lastBackwardsLineMatch == (lineNum + 1))) { lastNonOverlap = lastTotal; } if (info.extendStart < 0) { /* * No multi-line match is possible. */ break; } /* * We may be able to match if given more text. The * following 'while' block handles multi-line regexp * searches. */ while (1) { prevFullLine = lastTotal; /* * Move firstOffset to first possible start. */ if (!match) { firstOffset += info.extendStart; } if (firstOffset >= lastOffset) { /* * We're being told that the only possible new * match is starting after the end of the line. * But, that is the next line which we will handle * when we look at that line. */ if (!match && !searchSpecPtr->backwards && (firstOffset == 0)) { extraLinesSearched = extraLines; } break; } if (lineNum + extraLines >= searchSpecPtr->numLines) { break; } /* * Add next line, provided we haven't already done so. */ if (extraLines > maxExtraLines) { if ((*searchSpecPtr->addLineProc)(lineNum + extraLines, searchSpecPtr, theLine, &lastTotal, &extraLines) == NULL) { /* * There are no more acceptable lines, so we * can say we have searched all of these. */ if (!match && !searchSpecPtr->backwards) { extraLinesSearched = extraLines; } break; } maxExtraLines = extraLines; if ((lastBackwardsLineMatch != -1) && (lastBackwardsLineMatch == (lineNum + extraLines + 1))) { lastNonOverlap = lastTotal; } } match = Tcl_RegExpExecObj(interp, regexp, theLine, firstOffset, 1, ((firstOffset > 0) ? TCL_REG_NOTBOL : 0)); if (match < 0) { code = TCL_ERROR; goto searchDone; } Tcl_RegExpGetInfo(regexp, &info); /* * Unfortunately there are bugs in Tcl's regexp * library, which tells us that info.extendStart is * zero when it should not be (should be -1), which * makes our task a bit more complicated here. We * check if there was a match, and the end of the * match leaves an entire extra line unmatched, then * we stop searching. Clearly it still might sometimes * be possible to add more text and match again, but * Tcl's regexp library doesn't tell us that. * * This means we often add and search one more line * than might be necessary if Tcl were able to give us * a correct value of info.extendStart under all * circumstances. */ if ((match && firstOffset+info.matches[0].end != lastTotal && firstOffset+info.matches[0].end < prevFullLine) || info.extendStart < 0) { break; } /* * If there is a match, but that match starts after * the end of the first line, then we'll handle that * next time around, when we're actually looking at * that line. */ if (match && (info.matches[0].start >= lastOffset)) { break; } if (match && ((firstOffset + info.matches[0].end) >= prevFullLine)) { if (extraLines > 0) { extraLinesSearched = extraLines - 1; } lastFullLine = prevFullLine; } /* * The prefix matches, so keep looking. */ extraLines++; } /* * If we reach here with 'match == 1', we've found a * multi-line match, which we will record in the code * which follows directly else we started a multi-line * match but didn't finish it off, so we go to the next * line. */ if (!match) { /* * Here is where we could perform an optimisation, * since we have already retrieved the contents of the * next line (perhaps many more), so we shouldn't * really throw it all away and start again. This * could be particularly important for complex regexp * searches. * * This 'break' will take us to just before the * 'nextLine:' below. */ break; } if (lastBackwardsLineMatch != -1) { if ((lineNum + linesSearched + extraLinesSearched) == lastBackwardsLineMatch) { /* * Possible overlap or inclusion. */ int thisOffset = firstOffset + info.matches[0].end - info.matches[0].start; if (lastNonOverlap != -1) { /* * Possible overlap or enclosure. */ if (thisOffset-lastNonOverlap >= lastBackwardsMatchOffset+matchLength){ /* * Totally encloses previous match, so * forget the previous match. */ lastBackwardsLineMatch = -1; } else if ((thisOffset - lastNonOverlap) > lastBackwardsMatchOffset) { /* * Overlap. Previous match is ok, and the * current match is only ok if we are * searching with -overlap. */ if (searchSpecPtr->overlap) { goto recordBackwardsMatch; } else { match = 0; break; } } else { /* * No overlap, although the same line was * reached. */ goto recordBackwardsMatch; } } else { /* * No overlap. */ goto recordBackwardsMatch; } } else if (lineNum+linesSearched+extraLinesSearched < lastBackwardsLineMatch) { /* * No overlap. */ goto recordBackwardsMatch; } else { /* * Totally enclosed. */ lastBackwardsLineMatch = -1; } } } else { /* * Matched in a single line. */ if (lastBackwardsLineMatch != -1) { recordBackwardsMatch: (*searchSpecPtr->foundMatchProc)( lastBackwardsLineMatch, searchSpecPtr, NULL, NULL, lastBackwardsMatchOffset, matchLength); lastBackwardsLineMatch = -1; if (!searchSpecPtr->all) { goto searchDone; } } } firstOffset += info.matches[0].start; if (firstOffset >= lastOffset) { break; } /* * Update our local variables with the match, if we haven't * yet found anything, or if we're doing '-all' or * '-backwards' _and_ this match isn't fully enclosed in the * previous match. */ if (matchOffset == -1 || ((searchSpecPtr->all || searchSpecPtr->backwards) && ((firstOffset < matchOffset) || ((firstOffset + info.matches[0].end - info.matches[0].start) > (matchOffset + matchLength))))) { matchOffset = firstOffset; matchLength = info.matches[0].end - info.matches[0].start; if (searchSpecPtr->backwards) { /* * To get backwards searches in the correct order, we * must store them away here. */ if (matches == matchNum) { /* * We've run out of space in our normal store, so * we must allocate space for these backwards * matches on the heap. */ int *newArray = (int *) ckalloc(4 * matchNum * sizeof(int)); memcpy(newArray, storeMatch, matchNum*sizeof(int)); memcpy(newArray + 2*matchNum, storeLength, matchNum * sizeof(int)); if (storeMatch != smArray) { ckfree((char *) storeMatch); } matchNum *= 2; storeMatch = newArray; storeLength = newArray + matchNum; } storeMatch[matches] = matchOffset; storeLength[matches] = matchLength; matches++; } else { /* * Now actually record the match, but only if we are * doing an '-all' search. */ if (searchSpecPtr->all && !(*searchSpecPtr->foundMatchProc)(lineNum, searchSpecPtr, lineInfo, theLine, matchOffset, matchLength)) { /* * We reached the end of the search. */ goto searchDone; } } /* * For forward matches, unless we allow overlaps, we move * this on by the length of the current match so that we * explicitly disallow overlapping matches. */ if (matchLength > 0 && !searchSpecPtr->overlap && !searchSpecPtr->backwards) { firstOffset += matchLength; if (firstOffset >= lastOffset) { /* * Now, we have to be careful not to find * overlapping matches either on the same or * following lines. Assume that if we did find * something, it goes until the last extra line we * added. * * We can break out of the loop, since we know no * more will be found. */ alreadySearchOffset = firstOffset - lastFullLine; break; } /* * We'll add this on again just below. */ firstOffset --; } } /* * Move the starting point on, in case we are doing repeated * or backwards searches (for the latter, we actually do * repeated forward searches). */ firstOffset++; } while (searchSpecPtr->backwards || searchSpecPtr->all); if (matches > 0) { /* * Now we have all the matches in our array, but not stored * with 'foundMatchProc' yet. */ matches--; matchOffset = storeMatch[matches]; matchLength = storeLength[matches]; while (--matches >= 0) { if (lineNum == searchSpecPtr->stopLine) { /* * It appears as if a condition like: * * if (storeMatch[matches]stopOffset) * break; * * might be needed here, but no test case has been * found which would exercise such a problem. */ } if (storeMatch[matches] + storeLength[matches] >= matchOffset + matchLength) { /* * The new match totally encloses the previous one, so * we overwrite the previous one. */ matchOffset = storeMatch[matches]; matchLength = storeLength[matches]; continue; } if (!searchSpecPtr->overlap) { if (storeMatch[matches] + storeLength[matches] > matchOffset) { continue; } } (*searchSpecPtr->foundMatchProc)(lineNum, searchSpecPtr, lineInfo, theLine, matchOffset, matchLength); if (!searchSpecPtr->all) { goto searchDone; } matchOffset = storeMatch[matches]; matchLength = storeLength[matches]; } if (searchSpecPtr->all && matches > 0) { /* * We only need to do this for the '-all' case, because * just below we will call the foundMatchProc for the * non-all case. */ (*searchSpecPtr->foundMatchProc)(lineNum, searchSpecPtr, lineInfo, theLine, matchOffset, matchLength); } else { lastBackwardsLineMatch = lineNum; lastBackwardsMatchOffset = matchOffset; } } } /* * If the 'all' flag is set, we will already have stored all matches, * so we just proceed to the next line. * * If not, and there is a match we need to store that information and * we are done. */ if ((lastBackwardsLineMatch == -1) && (matchOffset >= 0) && !searchSpecPtr->all) { (*searchSpecPtr->foundMatchProc)(lineNum, searchSpecPtr, lineInfo, theLine, matchOffset, matchLength); goto searchDone; } /* * Go to the next (or previous) line; */ nextLine: linesSearched += extraLinesSearched; while (linesSearched-- > 0) { /* * If we have just completed the 'stopLine', we are done. */ if (lineNum == searchSpecPtr->stopLine) { goto searchDone; } if (searchSpecPtr->backwards) { lineNum--; if (lastBackwardsLineMatch != -1 && ((lineNum < 0) || (lineNum + 2 < lastBackwardsLineMatch))) { (*searchSpecPtr->foundMatchProc)(lastBackwardsLineMatch, searchSpecPtr, NULL, NULL, lastBackwardsMatchOffset, matchLength); lastBackwardsLineMatch = -1; if (!searchSpecPtr->all) { goto searchDone; } } if (lineNum < 0) { lineNum = searchSpecPtr->numLines-1; } if (!searchSpecPtr->exact) { /* * The 'exact' search loops above are designed to give us * an accurate picture of the number of lines which we can * skip here. For 'regexp' searches, on the other hand, * which can match potentially variable lengths, we cannot * skip multiple lines when searching backwards. Therefore * we only allow one line to be skipped here. */ break; } } else { lineNum++; if (lineNum >= searchSpecPtr->numLines) { lineNum = 0; } } if (lineNum == searchSpecPtr->startLine && linesSearched > 0) { /* * We've just searched all the way round and have gone right * through the start line without finding anything in the last * attempt. */ break; } } Tcl_SetObjLength(theLine, 0); } searchDone: if (lastBackwardsLineMatch != -1) { (*searchSpecPtr->foundMatchProc)(lastBackwardsLineMatch, searchSpecPtr, NULL, NULL, lastBackwardsMatchOffset, matchLength); } /* * Free up the cached line and pattern. */ Tcl_DecrRefCount(theLine); Tcl_DecrRefCount(patObj); /* * Free up any extra space we allocated. */ if (storeMatch != smArray) { ckfree((char *) storeMatch); } return code; } /* *---------------------------------------------------------------------- * * GetLineStartEnd - * * Converts an internal TkTextLine ptr into a Tcl string obj containing * the line number. (Handler for the 'line' configuration option type.) * * Results: * Tcl_Obj containing the string representation of the line value. * * Side effects: * Creates a new Tcl_Obj. * *---------------------------------------------------------------------- */ static Tcl_Obj * GetLineStartEnd( ClientData clientData, Tk_Window tkwin, char *recordPtr, /* Pointer to widget record. */ int internalOffset) /* Offset within *recordPtr containing the * line value. */ { TkTextLine *linePtr = *(TkTextLine **)(recordPtr + internalOffset); if (linePtr == NULL) { return Tcl_NewObj(); } else { return Tcl_NewIntObj(1+TkBTreeLinesTo(NULL, linePtr)); } } /* *---------------------------------------------------------------------- * * SetLineStartEnd -- * * Converts a Tcl_Obj representing a widget's (start or end) line into a * TkTextLine* value. (Handler for the 'line' configuration option type.) * * Results: * Standard Tcl result. * * Side effects: * May store the TkTextLine* value into the internal representation * pointer. May change the pointer to the Tcl_Obj to NULL to indicate * that the specified string was empty and that is acceptable. * *---------------------------------------------------------------------- */ static int SetLineStartEnd( ClientData clientData, Tcl_Interp *interp, /* Current interp; may be used for errors. */ Tk_Window tkwin, /* Window for which option is being set. */ Tcl_Obj **value, /* Pointer to the pointer to the value object. * We use a pointer to the pointer because we * may need to return a value (NULL). */ char *recordPtr, /* Pointer to storage for the widget record. */ int internalOffset, /* Offset within *recordPtr at which the * internal value is to be stored. */ char *oldInternalPtr, /* Pointer to storage for the old value. */ int flags) /* Flags for the option, set Tk_SetOptions. */ { TkTextLine *linePtr = NULL; char *internalPtr; TkText *textPtr = (TkText *) recordPtr; if (internalOffset >= 0) { internalPtr = recordPtr + internalOffset; } else { internalPtr = NULL; } if (flags & TK_OPTION_NULL_OK && ObjectIsEmpty(*value)) { *value = NULL; } else { int line; if (Tcl_GetIntFromObj(interp, *value, &line) != TCL_OK) { return TCL_ERROR; } linePtr = TkBTreeFindLine(textPtr->sharedTextPtr->tree, NULL, line-1); } if (internalPtr != NULL) { *((TkTextLine **) oldInternalPtr) = *((TkTextLine **) internalPtr); *((TkTextLine **) internalPtr) = linePtr; } return TCL_OK; } /* *---------------------------------------------------------------------- * * RestoreLineStartEnd -- * * Restore a line option value from a saved value. (Handler for the * 'line' configuration option type.) * * Results: * None. * * Side effects: * Restores the old value. * *---------------------------------------------------------------------- */ static void RestoreLineStartEnd( ClientData clientData, Tk_Window tkwin, char *internalPtr, /* Pointer to storage for value. */ char *oldInternalPtr) /* Pointer to old value. */ { *(TkTextLine **)internalPtr = *(TkTextLine **)oldInternalPtr; } /* *---------------------------------------------------------------------- * * ObjectIsEmpty -- * * This function tests whether the string value of an object is empty. * * Results: * The return value is 1 if the string value of objPtr has length zero, * and 0 otherwise. * * Side effects: * May cause object shimmering, since this function can force a * conversion to a string object. * *---------------------------------------------------------------------- */ static int ObjectIsEmpty( Tcl_Obj *objPtr) /* Object to test. May be NULL. */ { int length; if (objPtr == NULL) { return 1; } if (objPtr->bytes != NULL) { return (objPtr->length == 0); } Tcl_GetStringFromObj(objPtr, &length); return (length == 0); } /* *---------------------------------------------------------------------- * * TkpTesttextCmd -- * * This function implements the "testtext" command. It provides a set of * functions for testing text widgets and the associated functions in * tkText*.c. * * Results: * A standard Tcl result. * * Side effects: * Depends on option; see below. * *---------------------------------------------------------------------- */ int TkpTesttextCmd( ClientData clientData, /* Main window for application. */ Tcl_Interp *interp, /* Current interpreter. */ int argc, /* Number of arguments. */ CONST char **argv) /* Argument strings. */ { TkText *textPtr; size_t len; int lineIndex, byteIndex, byteOffset; TkTextIndex index; char buf[64]; Tcl_CmdInfo info; if (argc < 3) { return TCL_ERROR; } if (Tcl_GetCommandInfo(interp, argv[1], &info) == 0) { return TCL_ERROR; } if (info.isNativeObjectProc) { textPtr = (TkText *) info.objClientData; } else { textPtr = (TkText *) info.clientData; } len = strlen(argv[2]); if (strncmp(argv[2], "byteindex", len) == 0) { if (argc != 5) { return TCL_ERROR; } lineIndex = atoi(argv[3]) - 1; byteIndex = atoi(argv[4]); TkTextMakeByteIndex(textPtr->sharedTextPtr->tree, textPtr, lineIndex, byteIndex, &index); } else if (strncmp(argv[2], "forwbytes", len) == 0) { if (argc != 5) { return TCL_ERROR; } if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) { return TCL_ERROR; } byteOffset = atoi(argv[4]); TkTextIndexForwBytes(textPtr, &index, byteOffset, &index); } else if (strncmp(argv[2], "backbytes", len) == 0) { if (argc != 5) { return TCL_ERROR; } if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) { return TCL_ERROR; } byteOffset = atoi(argv[4]); TkTextIndexBackBytes(textPtr, &index, byteOffset, &index); } else { return TCL_ERROR; } TkTextSetMark(textPtr, "insert", &index); TkTextPrintIndex(textPtr, &index, buf); sprintf(buf + strlen(buf), " %d", index.byteIndex); Tcl_AppendResult(interp, buf, NULL); return TCL_OK; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */