/* * 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 and * the display code. The B-tree representation of text is * implemented elsewhere. * * Copyright (c) 1992-1994 The Regents of the University of California. * Copyright (c) 1994-1996 Sun Microsystems, Inc. * * 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 1.4 1999/04/17 02:31:20 rjohnson Exp $ */ #include "default.h" #include "tkPort.h" #include "tkInt.h" #ifdef MAC_TCL #define Style TkStyle #define DInfo TkDInfo #endif #include "tkText.h" /* * Information used to parse text configuration options: */ static Tk_ConfigSpec configSpecs[] = { {TK_CONFIG_BORDER, "-background", "background", "Background", DEF_TEXT_BG_COLOR, Tk_Offset(TkText, border), TK_CONFIG_COLOR_ONLY}, {TK_CONFIG_BORDER, "-background", "background", "Background", DEF_TEXT_BG_MONO, Tk_Offset(TkText, border), TK_CONFIG_MONO_ONLY}, {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL, (char *) NULL, 0, 0}, {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL, (char *) NULL, 0, 0}, {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", DEF_TEXT_BORDER_WIDTH, Tk_Offset(TkText, borderWidth), 0}, {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor", DEF_TEXT_CURSOR, Tk_Offset(TkText, cursor), TK_CONFIG_NULL_OK}, {TK_CONFIG_BOOLEAN, "-exportselection", "exportSelection", "ExportSelection", DEF_TEXT_EXPORT_SELECTION, Tk_Offset(TkText, exportSelection), 0}, {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL, (char *) NULL, 0, 0}, {TK_CONFIG_FONT, "-font", "font", "Font", DEF_TEXT_FONT, Tk_Offset(TkText, tkfont), 0}, {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground", DEF_TEXT_FG, Tk_Offset(TkText, fgColor), 0}, {TK_CONFIG_PIXELS, "-height", "height", "Height", DEF_TEXT_HEIGHT, Tk_Offset(TkText, height), 0}, {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground", "HighlightBackground", DEF_TEXT_HIGHLIGHT_BG, Tk_Offset(TkText, highlightBgColorPtr), 0}, {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor", DEF_TEXT_HIGHLIGHT, Tk_Offset(TkText, highlightColorPtr), 0}, {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness", "HighlightThickness", DEF_TEXT_HIGHLIGHT_WIDTH, Tk_Offset(TkText, highlightWidth), 0}, {TK_CONFIG_BORDER, "-insertbackground", "insertBackground", "Foreground", DEF_TEXT_INSERT_BG, Tk_Offset(TkText, insertBorder), 0}, {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth", DEF_TEXT_INSERT_BD_COLOR, Tk_Offset(TkText, insertBorderWidth), TK_CONFIG_COLOR_ONLY}, {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth", DEF_TEXT_INSERT_BD_MONO, Tk_Offset(TkText, insertBorderWidth), TK_CONFIG_MONO_ONLY}, {TK_CONFIG_INT, "-insertofftime", "insertOffTime", "OffTime", DEF_TEXT_INSERT_OFF_TIME, Tk_Offset(TkText, insertOffTime), 0}, {TK_CONFIG_INT, "-insertontime", "insertOnTime", "OnTime", DEF_TEXT_INSERT_ON_TIME, Tk_Offset(TkText, insertOnTime), 0}, {TK_CONFIG_PIXELS, "-insertwidth", "insertWidth", "InsertWidth", DEF_TEXT_INSERT_WIDTH, Tk_Offset(TkText, insertWidth), 0}, {TK_CONFIG_PIXELS, "-padx", "padX", "Pad", DEF_TEXT_PADX, Tk_Offset(TkText, padX), 0}, {TK_CONFIG_PIXELS, "-pady", "padY", "Pad", DEF_TEXT_PADY, Tk_Offset(TkText, padY), 0}, {TK_CONFIG_RELIEF, "-relief", "relief", "Relief", DEF_TEXT_RELIEF, Tk_Offset(TkText, relief), 0}, {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground", DEF_TEXT_SELECT_COLOR, Tk_Offset(TkText, selBorder), TK_CONFIG_COLOR_ONLY}, {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground", DEF_TEXT_SELECT_MONO, Tk_Offset(TkText, selBorder), TK_CONFIG_MONO_ONLY}, {TK_CONFIG_STRING, "-selectborderwidth", "selectBorderWidth", "BorderWidth", DEF_TEXT_SELECT_BD_COLOR, Tk_Offset(TkText, selBdString), TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK}, {TK_CONFIG_STRING, "-selectborderwidth", "selectBorderWidth", "BorderWidth", DEF_TEXT_SELECT_BD_MONO, Tk_Offset(TkText, selBdString), TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK}, {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background", DEF_TEXT_SELECT_FG_COLOR, Tk_Offset(TkText, selFgColorPtr), TK_CONFIG_COLOR_ONLY}, {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background", DEF_TEXT_SELECT_FG_MONO, Tk_Offset(TkText, selFgColorPtr), TK_CONFIG_MONO_ONLY}, {TK_CONFIG_BOOLEAN, "-setgrid", "setGrid", "SetGrid", DEF_TEXT_SET_GRID, Tk_Offset(TkText, setGrid), 0}, {TK_CONFIG_PIXELS, "-spacing1", "spacing1", "Spacing", DEF_TEXT_SPACING1, Tk_Offset(TkText, spacing1), TK_CONFIG_DONT_SET_DEFAULT}, {TK_CONFIG_PIXELS, "-spacing2", "spacing2", "Spacing", DEF_TEXT_SPACING2, Tk_Offset(TkText, spacing2), TK_CONFIG_DONT_SET_DEFAULT}, {TK_CONFIG_PIXELS, "-spacing3", "spacing3", "Spacing", DEF_TEXT_SPACING3, Tk_Offset(TkText, spacing3), TK_CONFIG_DONT_SET_DEFAULT}, {TK_CONFIG_UID, "-state", "state", "State", DEF_TEXT_STATE, Tk_Offset(TkText, state), 0}, {TK_CONFIG_STRING, "-tabs", "tabs", "Tabs", DEF_TEXT_TABS, Tk_Offset(TkText, tabOptionString), TK_CONFIG_NULL_OK}, {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus", DEF_TEXT_TAKE_FOCUS, Tk_Offset(TkText, takeFocus), TK_CONFIG_NULL_OK}, {TK_CONFIG_INT, "-width", "width", "Width", DEF_TEXT_WIDTH, Tk_Offset(TkText, width), 0}, {TK_CONFIG_UID, "-wrap", "wrap", "Wrap", DEF_TEXT_WRAP, Tk_Offset(TkText, wrapMode), 0}, {TK_CONFIG_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand", DEF_TEXT_XSCROLL_COMMAND, Tk_Offset(TkText, xScrollCmd), TK_CONFIG_NULL_OK}, {TK_CONFIG_STRING, "-yscrollcommand", "yScrollCommand", "ScrollCommand", DEF_TEXT_YSCROLL_COMMAND, Tk_Offset(TkText, yScrollCmd), TK_CONFIG_NULL_OK}, {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, 0, 0} }; /* * Boolean variable indicating whether or not special debugging code * should be executed. */ int tkTextDebug = 0; /* * Forward declarations for procedures defined later in this file: */ static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp, TkText *textPtr, int argc, char **argv, int flags)); static int DeleteChars _ANSI_ARGS_((TkText *textPtr, char *index1String, char *index2String)); static void DestroyText _ANSI_ARGS_((char *memPtr)); static void InsertChars _ANSI_ARGS_((TkText *textPtr, TkTextIndex *indexPtr, char *string)); static void TextBlinkProc _ANSI_ARGS_((ClientData clientData)); static void TextCmdDeletedProc _ANSI_ARGS_(( ClientData clientData)); static void TextEventProc _ANSI_ARGS_((ClientData clientData, XEvent *eventPtr)); static int TextFetchSelection _ANSI_ARGS_((ClientData clientData, int offset, char *buffer, int maxBytes)); static int TextSearchCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); static int TextWidgetCmd _ANSI_ARGS_((ClientData clientData, Tcl_Interp *interp, int argc, char **argv)); static void TextWorldChanged _ANSI_ARGS_(( ClientData instanceData)); static int TextDumpCmd _ANSI_ARGS_((TkText *textPtr, Tcl_Interp *interp, int argc, char **argv)); static void DumpLine _ANSI_ARGS_((Tcl_Interp *interp, TkText *textPtr, int what, TkTextLine *linePtr, int start, int end, int lineno, char *command)); static int DumpSegment _ANSI_ARGS_((Tcl_Interp *interp, char *key, char *value, char * command, int lineno, int offset, int what)); /* * The structure below defines text class behavior by means of procedures * that can be invoked from generic window code. */ static TkClassProcs textClass = { NULL, /* createProc. */ TextWorldChanged, /* geometryProc. */ NULL /* modalProc. */ }; /* *-------------------------------------------------------------- * * Tk_TextCmd -- * * This procedure 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_TextCmd(clientData, interp, argc, argv) ClientData clientData; /* Main window associated with * interpreter. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. */ { Tk_Window tkwin = (Tk_Window) clientData; Tk_Window new; register TkText *textPtr; TkTextIndex startIndex; if (argc < 2) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " pathName ?options?\"", (char *) NULL); return TCL_ERROR; } /* * Create the window. */ new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL); if (new == NULL) { return TCL_ERROR; } textPtr = (TkText *) ckalloc(sizeof(TkText)); textPtr->tkwin = new; textPtr->display = Tk_Display(new); textPtr->interp = interp; textPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(textPtr->tkwin), TextWidgetCmd, (ClientData) textPtr, TextCmdDeletedProc); textPtr->tree = TkBTreeCreate(textPtr); Tcl_InitHashTable(&textPtr->tagTable, TCL_STRING_KEYS); textPtr->numTags = 0; Tcl_InitHashTable(&textPtr->markTable, TCL_STRING_KEYS); Tcl_InitHashTable(&textPtr->windowTable, TCL_STRING_KEYS); Tcl_InitHashTable(&textPtr->imageTable, TCL_STRING_KEYS); textPtr->state = Tk_GetUid("normal"); textPtr->border = NULL; textPtr->borderWidth = 0; textPtr->padX = 0; textPtr->padY = 0; textPtr->relief = TK_RELIEF_FLAT; textPtr->highlightWidth = 0; textPtr->highlightBgColorPtr = NULL; textPtr->highlightColorPtr = NULL; textPtr->cursor = None; textPtr->fgColor = NULL; textPtr->tkfont = NULL; textPtr->charWidth = 1; textPtr->spacing1 = 0; textPtr->spacing2 = 0; textPtr->spacing3 = 0; textPtr->tabOptionString = NULL; textPtr->tabArrayPtr = NULL; textPtr->wrapMode = Tk_GetUid("char"); textPtr->width = 0; textPtr->height = 0; textPtr->setGrid = 0; textPtr->prevWidth = Tk_Width(new); textPtr->prevHeight = Tk_Height(new); TkTextCreateDInfo(textPtr); TkTextMakeByteIndex(textPtr->tree, 0, 0, &startIndex); TkTextSetYView(textPtr, &startIndex, 0); textPtr->selTagPtr = NULL; textPtr->selBorder = NULL; textPtr->selBdString = NULL; textPtr->selFgColorPtr = NULL; textPtr->exportSelection = 1; textPtr->abortSelections = 0; textPtr->insertMarkPtr = NULL; textPtr->insertBorder = NULL; textPtr->insertWidth = 0; textPtr->insertBorderWidth = 0; textPtr->insertOnTime = 0; textPtr->insertOffTime = 0; textPtr->insertBlinkHandler = (Tcl_TimerToken) NULL; textPtr->bindingTable = NULL; textPtr->currentMarkPtr = NULL; textPtr->pickEvent.type = LeaveNotify; textPtr->pickEvent.xcrossing.x = 0; textPtr->pickEvent.xcrossing.y = 0; textPtr->numCurTags = 0; textPtr->curTagArrayPtr = NULL; textPtr->takeFocus = NULL; textPtr->xScrollCmd = NULL; textPtr->yScrollCmd = NULL; textPtr->flags = 0; /* * Create the "sel" tag and the "current" and "insert" marks. */ textPtr->selTagPtr = TkTextCreateTag(textPtr, "sel"); textPtr->selTagPtr->reliefString = (char *) ckalloc(sizeof(DEF_TEXT_SELECT_RELIEF)); strcpy(textPtr->selTagPtr->reliefString, DEF_TEXT_SELECT_RELIEF); textPtr->selTagPtr->relief = TK_RELIEF_RAISED; textPtr->currentMarkPtr = TkTextSetMark(textPtr, "current", &startIndex); textPtr->insertMarkPtr = TkTextSetMark(textPtr, "insert", &startIndex); Tk_SetClass(textPtr->tkwin, "Text"); TkSetClassProcs(textPtr->tkwin, &textClass, (ClientData) textPtr); 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 (ConfigureText(interp, textPtr, argc-2, argv+2, 0) != TCL_OK) { Tk_DestroyWindow(textPtr->tkwin); return TCL_ERROR; } Tcl_SetResult(interp, Tk_PathName(textPtr->tkwin), TCL_STATIC); return TCL_OK; } /* *-------------------------------------------------------------- * * TextWidgetCmd -- * * This procedure 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 TextWidgetCmd(clientData, interp, argc, argv) ClientData clientData; /* Information about text widget. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. */ { register TkText *textPtr = (TkText *) clientData; int result = TCL_OK; size_t length; int c; TkTextIndex index1, index2; if (argc < 2) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " option ?arg arg ...?\"", (char *) NULL); return TCL_ERROR; } Tcl_Preserve((ClientData) textPtr); c = argv[1][0]; length = strlen(argv[1]); if ((c == 'b') && (strncmp(argv[1], "bbox", length) == 0)) { int x, y, width, height; if (argc != 3) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " bbox index\"", (char *) NULL); result = TCL_ERROR; goto done; } if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) { result = TCL_ERROR; goto done; } if (TkTextCharBbox(textPtr, &index1, &x, &y, &width, &height) == 0) { char buf[TCL_INTEGER_SPACE * 4]; sprintf(buf, "%d %d %d %d", x, y, width, height); Tcl_SetResult(interp, buf, TCL_VOLATILE); } } else if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0) && (length >= 2)) { if (argc != 3) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " cget option\"", (char *) NULL); result = TCL_ERROR; goto done; } result = Tk_ConfigureValue(interp, textPtr->tkwin, configSpecs, (char *) textPtr, argv[2], 0); } else if ((c == 'c') && (strncmp(argv[1], "compare", length) == 0) && (length >= 3)) { int relation, value; char *p; if (argc != 5) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " compare index1 op index2\"", (char *) NULL); result = TCL_ERROR; goto done; } if ((TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) || (TkTextGetIndex(interp, textPtr, argv[4], &index2) != TCL_OK)) { result = TCL_ERROR; goto done; } relation = TkTextIndexCmp(&index1, &index2); p = argv[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 \"", argv[3], "\": must be <, <=, ==, >=, >, or !=", (char *) 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_SetResult(interp, ((value) ? "1" : "0"), TCL_STATIC); } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0) && (length >= 3)) { if (argc == 2) { result = Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs, (char *) textPtr, (char *) NULL, 0); } else if (argc == 3) { result = Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs, (char *) textPtr, argv[2], 0); } else { result = ConfigureText(interp, textPtr, argc-2, argv+2, TK_CONFIG_ARGV_ONLY); } } else if ((c == 'd') && (strncmp(argv[1], "debug", length) == 0) && (length >= 3)) { if (argc > 3) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " debug boolean\"", (char *) NULL); result = TCL_ERROR; goto done; } if (argc == 2) { Tcl_SetResult(interp, ((tkBTreeDebug) ? "1" : "0"), TCL_STATIC); } else { if (Tcl_GetBoolean(interp, argv[2], &tkBTreeDebug) != TCL_OK) { result = TCL_ERROR; goto done; } tkTextDebug = tkBTreeDebug; } } else if ((c == 'd') && (strncmp(argv[1], "delete", length) == 0) && (length >= 3)) { if ((argc != 3) && (argc != 4)) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " delete index1 ?index2?\"", (char *) NULL); result = TCL_ERROR; goto done; } if (textPtr->state == Tk_GetUid("normal")) { result = DeleteChars(textPtr, argv[2], (argc == 4) ? argv[3] : (char *) NULL); } } else if ((c == 'd') && (strncmp(argv[1], "dlineinfo", length) == 0) && (length >= 2)) { int x, y, width, height, base; if (argc != 3) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " dlineinfo index\"", (char *) NULL); result = TCL_ERROR; goto done; } if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) { result = TCL_ERROR; goto done; } if (TkTextDLineInfo(textPtr, &index1, &x, &y, &width, &height, &base) == 0) { char buf[TCL_INTEGER_SPACE * 5]; sprintf(buf, "%d %d %d %d %d", x, y, width, height, base); Tcl_SetResult(interp, buf, TCL_VOLATILE); } } else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) { if ((argc != 3) && (argc != 4)) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " get index1 ?index2?\"", (char *) NULL); result = TCL_ERROR; goto done; } if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) { result = TCL_ERROR; goto done; } if (argc == 3) { index2 = index1; TkTextIndexForwChars(&index2, 1, &index2); } else if (TkTextGetIndex(interp, textPtr, argv[3], &index2) != TCL_OK) { result = TCL_ERROR; goto done; } if (TkTextIndexCmp(&index1, &index2) >= 0) { goto done; } while (1) { int offset, last, savedChar; TkTextSegment *segPtr; segPtr = TkTextIndexToSeg(&index1, &offset); last = segPtr->size; if (index1.linePtr == index2.linePtr) { int last2; if (index2.byteIndex == index1.byteIndex) { break; } last2 = index2.byteIndex - index1.byteIndex + offset; if (last2 < last) { last = last2; } } if (segPtr->typePtr == &tkTextCharType) { savedChar = segPtr->body.chars[last]; segPtr->body.chars[last] = 0; Tcl_AppendResult(interp, segPtr->body.chars + offset, (char *) NULL); segPtr->body.chars[last] = savedChar; } TkTextIndexForwBytes(&index1, last-offset, &index1); } } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0) && (length >= 3)) { char buf[200]; if (argc != 3) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " index index\"", (char *) NULL); result = TCL_ERROR; goto done; } if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) { result = TCL_ERROR; goto done; } TkTextPrintIndex(&index1, buf); Tcl_SetResult(interp, buf, TCL_VOLATILE); } else if ((c == 'i') && (strncmp(argv[1], "insert", length) == 0) && (length >= 3)) { int i, j, numTags; char **tagNames; TkTextTag **oldTagArrayPtr; if (argc < 4) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " insert index chars ?tagList chars tagList ...?\"", (char *) NULL); result = TCL_ERROR; goto done; } if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) { result = TCL_ERROR; goto done; } if (textPtr->state == Tk_GetUid("normal")) { for (j = 3; j < argc; j += 2) { InsertChars(textPtr, &index1, argv[j]); if (argc > (j+1)) { TkTextIndexForwBytes(&index1, (int) strlen(argv[j]), &index2); oldTagArrayPtr = TkBTreeGetTags(&index1, &numTags); if (oldTagArrayPtr != NULL) { for (i = 0; i < numTags; i++) { TkBTreeTag(&index1, &index2, oldTagArrayPtr[i], 0); } ckfree((char *) oldTagArrayPtr); } if (Tcl_SplitList(interp, argv[j+1], &numTags, &tagNames) != TCL_OK) { result = TCL_ERROR; goto done; } for (i = 0; i < numTags; i++) { TkBTreeTag(&index1, &index2, TkTextCreateTag(textPtr, tagNames[i]), 1); } ckfree((char *) tagNames); index1 = index2; } } } } else if ((c == 'd') && (strncmp(argv[1], "dump", length) == 0)) { result = TextDumpCmd(textPtr, interp, argc, argv); } else if ((c == 'i') && (strncmp(argv[1], "image", length) == 0)) { result = TkTextImageCmd(textPtr, interp, argc, argv); } else if ((c == 'm') && (strncmp(argv[1], "mark", length) == 0)) { result = TkTextMarkCmd(textPtr, interp, argc, argv); } else if ((c == 's') && (strcmp(argv[1], "scan") == 0) && (length >= 2)) { result = TkTextScanCmd(textPtr, interp, argc, argv); } else if ((c == 's') && (strcmp(argv[1], "search") == 0) && (length >= 3)) { result = TextSearchCmd(textPtr, interp, argc, argv); } else if ((c == 's') && (strcmp(argv[1], "see") == 0) && (length >= 3)) { result = TkTextSeeCmd(textPtr, interp, argc, argv); } else if ((c == 't') && (strcmp(argv[1], "tag") == 0)) { result = TkTextTagCmd(textPtr, interp, argc, argv); } else if ((c == 'w') && (strncmp(argv[1], "window", length) == 0)) { result = TkTextWindowCmd(textPtr, interp, argc, argv); } else if ((c == 'x') && (strncmp(argv[1], "xview", length) == 0)) { result = TkTextXviewCmd(textPtr, interp, argc, argv); } else if ((c == 'y') && (strncmp(argv[1], "yview", length) == 0) && (length >= 2)) { result = TkTextYviewCmd(textPtr, interp, argc, argv); } else { Tcl_AppendResult(interp, "bad option \"", argv[1], "\": must be bbox, cget, compare, configure, debug, delete, ", "dlineinfo, get, image, index, insert, mark, scan, search, see, ", "tag, window, xview, or yview", (char *) NULL); result = TCL_ERROR; } done: Tcl_Release((ClientData) textPtr); return result; } /* *---------------------------------------------------------------------- * * DestroyText -- * * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release * to clean up the internal structure of a text at a safe time * (when no-one is using it anymore). * * Results: * None. * * Side effects: * Everything associated with the text is freed up. * *---------------------------------------------------------------------- */ static void DestroyText(memPtr) char *memPtr; /* Info about text widget. */ { register TkText *textPtr = (TkText *) memPtr; Tcl_HashSearch search; Tcl_HashEntry *hPtr; TkTextTag *tagPtr; /* * Free up all the stuff that requires special handling, then * let Tk_FreeOptions handle all the standard option-related * stuff. 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); TkBTreeDestroy(textPtr->tree); for (hPtr = Tcl_FirstHashEntry(&textPtr->tagTable, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { tagPtr = (TkTextTag *) Tcl_GetHashValue(hPtr); TkTextFreeTag(textPtr, tagPtr); } Tcl_DeleteHashTable(&textPtr->tagTable); for (hPtr = Tcl_FirstHashEntry(&textPtr->markTable, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { ckfree((char *) Tcl_GetHashValue(hPtr)); } Tcl_DeleteHashTable(&textPtr->markTable); if (textPtr->tabArrayPtr != NULL) { ckfree((char *) textPtr->tabArrayPtr); } if (textPtr->insertBlinkHandler != NULL) { Tcl_DeleteTimerHandler(textPtr->insertBlinkHandler); } if (textPtr->bindingTable != NULL) { Tk_DeleteBindingTable(textPtr->bindingTable); } /* * NOTE: do NOT free up selBorder, selBdString, or selFgColorPtr: * they are duplicates of information in the "sel" tag, which was * freed up as part of deleting the tags above. */ textPtr->selBorder = NULL; textPtr->selBdString = NULL; textPtr->selFgColorPtr = NULL; Tk_FreeOptions(configSpecs, (char *) textPtr, textPtr->display, 0); ckfree((char *) textPtr); } /* *---------------------------------------------------------------------- * * ConfigureText -- * * This procedure is called to process an argv/argc 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(interp, textPtr, argc, argv, flags) Tcl_Interp *interp; /* Used for error reporting. */ register TkText *textPtr; /* Information about widget; may or may * not already have values for some fields. */ int argc; /* Number of valid entries in argv. */ char **argv; /* Arguments. */ int flags; /* Flags to pass to Tk_ConfigureWidget. */ { int oldExport = textPtr->exportSelection; if (Tk_ConfigureWidget(interp, textPtr->tkwin, configSpecs, argc, argv, (char *) textPtr, flags) != TCL_OK) { return TCL_ERROR; } /* * A few other options also need special processing, such as parsing * the geometry and setting the background from a 3-D border. */ if ((textPtr->state != Tk_GetUid("normal")) && (textPtr->state != Tk_GetUid("disabled"))) { Tcl_AppendResult(interp, "bad state value \"", textPtr->state, "\": must be normal or disabled", (char *) NULL); textPtr->state = Tk_GetUid("normal"); return TCL_ERROR; } if ((textPtr->wrapMode != Tk_GetUid("char")) && (textPtr->wrapMode != Tk_GetUid("none")) && (textPtr->wrapMode != Tk_GetUid("word"))) { Tcl_AppendResult(interp, "bad wrap mode \"", textPtr->wrapMode, "\": must be char, none, or word", (char *) NULL); textPtr->wrapMode = Tk_GetUid("char"); return TCL_ERROR; } Tk_SetBackgroundFromBorder(textPtr->tkwin, textPtr->border); /* * 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->tabOptionString != NULL) { textPtr->tabArrayPtr = TkTextGetTabs(interp, textPtr->tkwin, textPtr->tabOptionString); if (textPtr->tabArrayPtr == NULL) { Tcl_AddErrorInfo(interp,"\n (while processing -tabs option)"); 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->bdString != textPtr->selBdString) { textPtr->selTagPtr->bdString = textPtr->selBdString; if (textPtr->selBdString != NULL) { if (Tk_GetPixels(interp, textPtr->tkwin, textPtr->selBdString, &textPtr->selTagPtr->borderWidth) != TCL_OK) { return TCL_ERROR; } if (textPtr->selTagPtr->borderWidth < 0) { textPtr->selTagPtr->borderWidth = 0; } } } textPtr->selTagPtr->fgColor = textPtr->selFgColorPtr; textPtr->selTagPtr->affectsDisplay = 0; if ((textPtr->selTagPtr->border != NULL) || (textPtr->selTagPtr->bdString != NULL) || (textPtr->selTagPtr->reliefString != NULL) || (textPtr->selTagPtr->bgStipple != None) || (textPtr->selTagPtr->fgColor != NULL) || (textPtr->selTagPtr->tkfont != None) || (textPtr->selTagPtr->fgStipple != None) || (textPtr->selTagPtr->justifyString != NULL) || (textPtr->selTagPtr->lMargin1String != NULL) || (textPtr->selTagPtr->lMargin2String != NULL) || (textPtr->selTagPtr->offsetString != NULL) || (textPtr->selTagPtr->overstrikeString != NULL) || (textPtr->selTagPtr->rMarginString != NULL) || (textPtr->selTagPtr->spacing1String != NULL) || (textPtr->selTagPtr->spacing2String != NULL) || (textPtr->selTagPtr->spacing3String != NULL) || (textPtr->selTagPtr->tabString != NULL) || (textPtr->selTagPtr->underlineString != NULL) || (textPtr->selTagPtr->wrapMode != NULL)) { textPtr->selTagPtr->affectsDisplay = 1; } TkTextRedrawTag(textPtr, (TkTextIndex *) NULL, (TkTextIndex *) 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->tree, 0, 0, &first); TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree), 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; } } /* * 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; } TextWorldChanged((ClientData) textPtr); return TCL_OK; } /* *--------------------------------------------------------------------------- * * TextWorldChanged -- * * This procedure 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 argc/argv, for * the side effect of causing all the items to recompute their * geometry and to be redisplayed. * *--------------------------------------------------------------------------- */ static void TextWorldChanged(instanceData) ClientData instanceData; /* Information about widget. */ { TkText *textPtr; Tk_FontMetrics fm; textPtr = (TkText *) instanceData; textPtr->charWidth = Tk_TextWidth(textPtr->tkfont, "0", 1); if (textPtr->charWidth <= 0) { textPtr->charWidth = 1; } Tk_GetFontMetrics(textPtr->tkfont, &fm); Tk_GeometryRequest(textPtr->tkwin, textPtr->width * textPtr->charWidth + 2*textPtr->borderWidth + 2*textPtr->padX + 2*textPtr->highlightWidth, textPtr->height * (fm.linespace + textPtr->spacing1 + textPtr->spacing3) + 2*textPtr->borderWidth + 2*textPtr->padY + 2*textPtr->highlightWidth); Tk_SetInternalBorder(textPtr->tkwin, textPtr->borderWidth + textPtr->highlightWidth); if (textPtr->setGrid) { Tk_SetGrid(textPtr->tkwin, textPtr->width, textPtr->height, textPtr->charWidth, fm.linespace); } else { Tk_UnsetGrid(textPtr->tkwin); } TkTextRelayoutWindow(textPtr); } /* *-------------------------------------------------------------- * * TextEventProc -- * * This procedure is invoked by the Tk dispatcher on * structure changes to a text. For texts with 3D * borders, this procedure 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, eventPtr) 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))) { TkTextRelayoutWindow(textPtr); textPtr->prevWidth = Tk_Width(textPtr->tkwin); textPtr->prevHeight = Tk_Height(textPtr->tkwin); } } else if (eventPtr->type == DestroyNotify) { if (textPtr->tkwin != NULL) { if (textPtr->setGrid) { Tk_UnsetGrid(textPtr->tkwin); } textPtr->tkwin = NULL; Tcl_DeleteCommandFromToken(textPtr->interp, textPtr->widgetCmd); } Tcl_EventuallyFree((ClientData) textPtr, DestroyText); } else if ((eventPtr->type == FocusIn) || (eventPtr->type == FocusOut)) { if (eventPtr->xfocus.detail != NotifyInferior) { 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; } #ifndef ALWAYS_SHOW_SELECTION TkTextRedrawTag(textPtr, NULL, NULL, textPtr->selTagPtr, 1); #endif TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index); TkTextIndexForwChars(&index, 1, &index2); TkTextChanged(textPtr, &index, &index2); if (textPtr->highlightWidth > 0) { TkTextRedrawRegion(textPtr, 0, 0, textPtr->highlightWidth, textPtr->highlightWidth); } } } } /* *---------------------------------------------------------------------- * * TextCmdDeletedProc -- * * This procedure 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 clientData; /* Pointer to widget record for widget. */ { TkText *textPtr = (TkText *) clientData; Tk_Window tkwin = textPtr->tkwin; /* * This procedure could be invoked either because the window was * destroyed and the command was then deleted (in which case tkwin * is NULL) or because the command was deleted, and then this procedure * destroys the widget. */ if (tkwin != NULL) { if (textPtr->setGrid) { Tk_UnsetGrid(textPtr->tkwin); } textPtr->tkwin = NULL; Tk_DestroyWindow(tkwin); } } /* *---------------------------------------------------------------------- * * InsertChars -- * * This procedure implements most of the functionality of the * "insert" widget command. * * Results: * None. * * Side effects: * The characters in "string" get added to the text just before * the character indicated by "indexPtr". * *---------------------------------------------------------------------- */ static void InsertChars(textPtr, indexPtr, string) TkText *textPtr; /* Overall information about text widget. */ TkTextIndex *indexPtr; /* Where to insert new characters. May be * modified and/or invalidated. */ char *string; /* Null-terminated string containing new * information to add to text. */ { int lineIndex, resetView, offset; TkTextIndex newTop; /* * Don't allow insertions on the last (dummy) line of the text. */ lineIndex = TkBTreeLineIndex(indexPtr->linePtr); if (lineIndex == TkBTreeNumLines(textPtr->tree)) { lineIndex--; TkTextMakeByteIndex(textPtr->tree, 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. */ resetView = offset = 0; if (indexPtr->linePtr == textPtr->topIndex.linePtr) { resetView = 1; offset = textPtr->topIndex.byteIndex; if (offset > indexPtr->byteIndex) { offset += strlen(string); } } TkTextChanged(textPtr, indexPtr, indexPtr); TkBTreeInsertChars(indexPtr, string); if (resetView) { TkTextMakeByteIndex(textPtr->tree, lineIndex, 0, &newTop); TkTextIndexForwBytes(&newTop, offset, &newTop); TkTextSetYView(textPtr, &newTop, 0); } /* * Invalidate any selection retrievals in progress. */ textPtr->abortSelections = 1; } /* *---------------------------------------------------------------------- * * DeleteChars -- * * This procedure implements most of the functionality of the * "delete" widget command. * * Results: * Returns a standard Tcl result, and leaves an error message * in textPtr->interp if there is an error. * * Side effects: * Characters get deleted from the text. * *---------------------------------------------------------------------- */ static int DeleteChars(textPtr, index1String, index2String) TkText *textPtr; /* Overall information about text widget. */ char *index1String; /* String describing location of first * character to delete. */ char *index2String; /* String describing location of last * character to delete. NULL means just * delete the one character given by * index1String. */ { int line1, line2, line, byteIndex, resetView; TkTextIndex index1, index2; /* * Parse the starting and stopping indices. */ if (TkTextGetIndex(textPtr->interp, textPtr, index1String, &index1) != TCL_OK) { return TCL_ERROR; } if (index2String != NULL) { if (TkTextGetIndex(textPtr->interp, textPtr, index2String, &index2) != TCL_OK) { return TCL_ERROR; } } else { index2 = index1; TkTextIndexForwChars(&index2, 1, &index2); } /* * 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). */ line1 = TkBTreeLineIndex(index1.linePtr); line2 = TkBTreeLineIndex(index2.linePtr); if (line2 == TkBTreeNumLines(textPtr->tree)) { TkTextTag **arrayPtr; int arraySize, i; TkTextIndex oldIndex2; oldIndex2 = index2; TkTextIndexBackChars(&oldIndex2, 1, &index2); line2--; if ((index1.byteIndex == 0) && (line1 != 0)) { TkTextIndexBackChars(&index1, 1, &index1); line1--; } arrayPtr = TkBTreeGetTags(&index2, &arraySize); if (arrayPtr != NULL) { for (i = 0; i < arraySize; i++) { TkBTreeTag(&index2, &oldIndex2, arrayPtr[i], 0); } ckfree((char *) arrayPtr); } } /* * 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(textPtr, &index1, &index2); resetView = 0; line = 0; byteIndex = 0; if (TkTextIndexCmp(&index2, &textPtr->topIndex) >= 0) { if (TkTextIndexCmp(&index1, &textPtr->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 == textPtr->topIndex.linePtr) { /* * Deletion range starts on top line but after topIndex. * Use the current topIndex as the new one. */ resetView = 1; line = line1; byteIndex = textPtr->topIndex.byteIndex; } } else if (index2.linePtr == textPtr->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 = textPtr->topIndex.byteIndex; if (index1.linePtr != index2.linePtr) { byteIndex -= index2.byteIndex; } else { byteIndex -= (index2.byteIndex - index1.byteIndex); } } TkBTreeDeleteChars(&index1, &index2); if (resetView) { TkTextMakeByteIndex(textPtr->tree, line, byteIndex, &index1); TkTextSetYView(textPtr, &index1, 0); } /* * Invalidate any selection retrievals in progress. */ textPtr->abortSelections = 1; return TCL_OK; } /* *---------------------------------------------------------------------- * * TextFetchSelection -- * * This procedure 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, offset, buffer, maxBytes) 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->tree, 0, 0, &textPtr->selIndex); textPtr->abortSelections = 0; } else if (textPtr->abortSelections) { return 0; } TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree), 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)) { 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 done; } 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) { memcpy((VOID *) buffer, (VOID *) (segPtr->body.chars + offsetInSeg), (size_t) chunkSize); buffer += chunkSize; maxBytes -= chunkSize; count += chunkSize; } TkTextIndexForwBytes(&textPtr->selIndex, chunkSize, &textPtr->selIndex); } /* * Find the beginning of the next range of selected text. */ if (!TkBTreeNextTag(&search)) { break; } textPtr->selIndex = search.curIndex; } done: *buffer = 0; return count; } /* *---------------------------------------------------------------------- * * TkTextLostSelection -- * * This procedure 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 clientData; /* Information about text widget. */ { register TkText *textPtr = (TkText *) clientData; #ifdef ALWAYS_SHOW_SELECTION 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->tree, 0, 0, &start); TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree), 0, &end); TkTextRedrawTag(textPtr, &start, &end, textPtr->selTagPtr, 1); TkBTreeTag(&start, &end, textPtr->selTagPtr, 0); #endif textPtr->flags &= ~GOT_SELECTION; } /* *---------------------------------------------------------------------- * * TextBlinkProc -- * * This procedure 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 procedure reschedules itself. * *---------------------------------------------------------------------- */ static void TextBlinkProc(clientData) ClientData clientData; /* Pointer to record describing text. */ { register TkText *textPtr = (TkText *) clientData; TkTextIndex index; int x, y, w, h; if (!(textPtr->flags & GOT_FOCUS) || (textPtr->insertOffTime == 0)) { 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); } TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index); TkTextCharBbox(textPtr, &index, &x, &y, &w, &h); TkTextRedrawRegion(textPtr, x - textPtr->insertWidth / 2, y, textPtr->insertWidth, h); } /* *---------------------------------------------------------------------- * * TextSearchCmd -- * * This procedure 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(textPtr, interp, argc, argv) TkText *textPtr; /* Information about text widget. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. */ { int backwards, exact, c, i, argsLeft, noCase, leftToScan; size_t length; int numLines, startingLine, startingByte, lineNum, firstByte, lastByte; int code, matchLength, matchByte, passes, stopLine, searchWholeText; int patLength; char *arg, *pattern, *varName, *p, *startOfLine; char buffer[20]; TkTextIndex index, stopIndex; Tcl_DString line, patDString; TkTextSegment *segPtr; TkTextLine *linePtr; Tcl_RegExp regexp = NULL; /* Initialization needed only to * prevent compiler warning. */ /* * Parse switches and other arguments. */ exact = 1; backwards = 0; noCase = 0; varName = NULL; for (i = 2; i < argc; i++) { arg = argv[i]; if (arg[0] != '-') { break; } length = strlen(arg); if (length < 2) { badSwitch: Tcl_AppendResult(interp, "bad switch \"", arg, "\": must be -forward, -backward, -exact, -regexp, ", "-nocase, -count, or --", (char *) NULL); return TCL_ERROR; } c = arg[1]; if ((c == 'b') && (strncmp(argv[i], "-backwards", length) == 0)) { backwards = 1; } else if ((c == 'c') && (strncmp(argv[i], "-count", length) == 0)) { if (i >= (argc-1)) { Tcl_SetResult(interp, "no value given for \"-count\" option", TCL_STATIC); return TCL_ERROR; } i++; varName = argv[i]; } else if ((c == 'e') && (strncmp(argv[i], "-exact", length) == 0)) { exact = 1; } else if ((c == 'f') && (strncmp(argv[i], "-forwards", length) == 0)) { backwards = 0; } else if ((c == 'n') && (strncmp(argv[i], "-nocase", length) == 0)) { noCase = 1; } else if ((c == 'r') && (strncmp(argv[i], "-regexp", length) == 0)) { exact = 0; } else if ((c == '-') && (strncmp(argv[i], "--", length) == 0)) { i++; break; } else { goto badSwitch; } } argsLeft = argc - (i+2); if ((argsLeft != 0) && (argsLeft != 1)) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " search ?switches? pattern index ?stopIndex?", (char *) NULL); return TCL_ERROR; } pattern = argv[i]; /* * Convert the pattern to lower-case if we're supposed to ignore case. */ if (noCase) { Tcl_DStringInit(&patDString); Tcl_DStringAppend(&patDString, pattern, -1); pattern = Tcl_DStringValue(&patDString); Tcl_UtfToLower(pattern); } Tcl_DStringInit(&line); if (TkTextGetIndex(interp, textPtr, argv[i+1], &index) != TCL_OK) { code = TCL_ERROR; goto done; } numLines = TkBTreeNumLines(textPtr->tree); startingLine = TkBTreeLineIndex(index.linePtr); startingByte = index.byteIndex; if (startingLine >= numLines) { if (backwards) { startingLine = TkBTreeNumLines(textPtr->tree) - 1; startingByte = TkBTreeBytesInLine(TkBTreeFindLine(textPtr->tree, startingLine)); } else { startingLine = 0; startingByte = 0; } } if (argsLeft == 1) { if (TkTextGetIndex(interp, textPtr, argv[i+2], &stopIndex) != TCL_OK) { code = TCL_ERROR; goto done; } stopLine = TkBTreeLineIndex(stopIndex.linePtr); if (!backwards && (stopLine == numLines)) { stopLine = numLines-1; } searchWholeText = 0; } else { stopLine = 0; searchWholeText = 1; } /* * Scan through all of the lines of the text circularly, starting * at the given index. */ matchLength = patLength = 0; /* Only needed to prevent compiler * warnings. */ if (exact) { patLength = strlen(pattern); } else { regexp = Tcl_RegExpCompile(interp, pattern); if (regexp == NULL) { code = TCL_ERROR; goto done; } } lineNum = startingLine; code = TCL_OK; for (passes = 0; passes < 2; ) { if (lineNum >= numLines) { /* * Don't search the dummy last line of the text. */ goto nextLine; } /* * Extract the text from the line. If we're doing regular * expression matching, drop the newline from the line, so * that "$" can be used to match the end of the line. */ linePtr = TkBTreeFindLine(textPtr->tree, lineNum); for (segPtr = linePtr->segPtr; segPtr != NULL; segPtr = segPtr->nextPtr) { if (segPtr->typePtr != &tkTextCharType) { continue; } Tcl_DStringAppend(&line, segPtr->body.chars, segPtr->size); } if (!exact) { Tcl_DStringSetLength(&line, Tcl_DStringLength(&line)-1); } startOfLine = Tcl_DStringValue(&line); /* * If we're ignoring case, convert the line to lower case. */ if (noCase) { Tcl_DStringSetLength(&line, Tcl_UtfToLower(Tcl_DStringValue(&line))); } /* * Check for matches within the current line. If so, and if we're * searching backwards, repeat the search to find the last match * in the line. */ matchByte = -1; firstByte = 0; lastByte = INT_MAX; if (lineNum == startingLine) { int indexInDString; /* * 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. We have to be very * careful here because there could be embedded windows or * other things that are not in the extracted line. Rescan * the original line to compute the index in it of the first * character. */ indexInDString = startingByte; for (segPtr = linePtr->segPtr, leftToScan = startingByte; leftToScan > 0; segPtr = segPtr->nextPtr) { if (segPtr->typePtr != &tkTextCharType) { indexInDString -= segPtr->size; } leftToScan -= segPtr->size; } passes++; if ((passes == 1) ^ backwards) { /* * Only use the last part of the line. */ firstByte = indexInDString; if (firstByte >= Tcl_DStringLength(&line)) { goto nextLine; } } else { /* * Use only the first part of the line. */ lastByte = indexInDString; } } do { int thisLength; Tcl_UniChar ch; if (exact) { p = strstr(startOfLine + firstByte, /* INTL: Native. */ pattern); if (p == NULL) { break; } i = p - startOfLine; thisLength = patLength; } else { char *start, *end; int match; match = Tcl_RegExpExec(interp, regexp, startOfLine + firstByte, startOfLine); if (match < 0) { code = TCL_ERROR; goto done; } if (!match) { break; } Tcl_RegExpRange(regexp, 0, &start, &end); i = start - startOfLine; thisLength = end - start; } if (i >= lastByte) { break; } matchByte = i; matchLength = thisLength; firstByte += Tcl_UtfToUniChar(startOfLine + matchByte, &ch); } while (backwards); /* * If we found a match then we're done. Make sure that * the match occurred before the stopping index, if one was * specified. */ if (matchByte >= 0) { int numChars; /* * Convert the byte length to a character count. */ numChars = Tcl_NumUtfChars(startOfLine + matchByte, matchLength); /* * The index information returned by the regular expression * parser only considers textual information: it doesn't * account for embedded windows or any other non-textual info. * Scan through the line's segments again to adjust both * matchChar and matchCount. */ for (segPtr = linePtr->segPtr, leftToScan = matchByte; leftToScan >= 0; segPtr = segPtr->nextPtr) { if (segPtr->typePtr != &tkTextCharType) { matchByte += segPtr->size; continue; } leftToScan -= segPtr->size; } for (leftToScan += matchLength; leftToScan > 0; segPtr = segPtr->nextPtr) { if (segPtr->typePtr != &tkTextCharType) { numChars += segPtr->size; continue; } leftToScan -= segPtr->size; } TkTextMakeByteIndex(textPtr->tree, lineNum, matchByte, &index); if (!searchWholeText) { if (!backwards && (TkTextIndexCmp(&index, &stopIndex) >= 0)) { goto done; } if (backwards && (TkTextIndexCmp(&index, &stopIndex) < 0)) { goto done; } } if (varName != NULL) { sprintf(buffer, "%d", numChars); if (Tcl_SetVar(interp, varName, buffer, TCL_LEAVE_ERR_MSG) == NULL) { code = TCL_ERROR; goto done; } } TkTextPrintIndex(&index, buffer); Tcl_SetResult(interp, buffer, TCL_VOLATILE); goto done; } /* * Go to the next (or previous) line; */ nextLine: if (backwards) { lineNum--; if (!searchWholeText) { if (lineNum < stopLine) { break; } } else if (lineNum < 0) { lineNum = numLines-1; } } else { lineNum++; if (!searchWholeText) { if (lineNum > stopLine) { break; } } else if (lineNum >= numLines) { lineNum = 0; } } Tcl_DStringSetLength(&line, 0); } done: Tcl_DStringFree(&line); if (noCase) { Tcl_DStringFree(&patDString); } return code; } /* *---------------------------------------------------------------------- * * 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(interp, tkwin, string) Tcl_Interp *interp; /* Used for error reporting. */ Tk_Window tkwin; /* Window in which the tabs will be * used. */ char *string; /* Description of the tab stops. See * the text manual entry for details. */ { int argc, i, count, c; char **argv; TkTextTabArray *tabArrayPtr; TkTextTab *tabPtr; Tcl_UniChar ch; if (Tcl_SplitList(interp, string, &argc, &argv) != TCL_OK) { return NULL; } /* * First find out how many entries we need to allocate in the * tab array. */ count = 0; for (i = 0; i < argc; i++) { c = argv[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; for (i = 0, tabPtr = &tabArrayPtr->tabs[0]; i < argc; i++, tabPtr++) { if (Tk_GetPixels(interp, tkwin, argv[i], &tabPtr->location) != TCL_OK) { goto error; } tabArrayPtr->numTabs++; /* * See if there is an explicit alignment in the next list * element. Otherwise just use "left". */ tabPtr->alignment = LEFT; if ((i+1) == argc) { continue; } Tcl_UtfToUniChar(argv[i+1], &ch); if (!Tcl_UniCharIsAlpha(ch)) { continue; } i += 1; c = argv[i][0]; if ((c == 'l') && (strncmp(argv[i], "left", strlen(argv[i])) == 0)) { tabPtr->alignment = LEFT; } else if ((c == 'r') && (strncmp(argv[i], "right", strlen(argv[i])) == 0)) { tabPtr->alignment = RIGHT; } else if ((c == 'c') && (strncmp(argv[i], "center", strlen(argv[i])) == 0)) { tabPtr->alignment = CENTER; } else if ((c == 'n') && (strncmp(argv[i], "numeric", strlen(argv[i])) == 0)) { tabPtr->alignment = NUMERIC; } else { Tcl_AppendResult(interp, "bad tab alignment \"", argv[i], "\": must be left, right, center, or numeric", (char *) NULL); goto error; } } ckfree((char *) argv); return tabArrayPtr; error: ckfree((char *) tabArrayPtr); ckfree((char *) argv); 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(textPtr, interp, argc, argv) register TkText *textPtr; /* Information about text widget. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. Someone else has already * parsed this command enough to know that * argv[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; char *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) for (arg=2 ; argv[arg] != (char *) NULL ; arg++) { size_t len; if (argv[arg][0] != '-') { break; } len = strlen(argv[arg]); if (strncmp("-all", argv[arg], len) == 0) { what = TK_DUMP_ALL; } else if (strncmp("-text", argv[arg], len) == 0) { what |= TK_DUMP_TEXT; } else if (strncmp("-tag", argv[arg], len) == 0) { what |= TK_DUMP_TAG; } else if (strncmp("-mark", argv[arg], len) == 0) { what |= TK_DUMP_MARK; } else if (strncmp("-image", argv[arg], len) == 0) { what |= TK_DUMP_IMG; } else if (strncmp("-window", argv[arg], len) == 0) { what |= TK_DUMP_WIN; } else if (strncmp("-command", argv[arg], len) == 0) { arg++; if (arg >= argc) { Tcl_AppendResult(interp, "Usage: ", argv[0], " dump ?-all -image -text -mark -tag -window? ?-command script? index ?index2?", NULL); return TCL_ERROR; } command = argv[arg]; } else { Tcl_AppendResult(interp, "Usage: ", argv[0], " dump ?-all -image -text -mark -tag -window? ?-command script? index ?index2?", NULL); return TCL_ERROR; } } if (arg >= argc) { Tcl_AppendResult(interp, "Usage: ", argv[0], " dump ?-all -image -text -mark -tag -window? ?-command script? index ?index2?", NULL); return TCL_ERROR; } if (what == 0) { what = TK_DUMP_ALL; } if (TkTextGetIndex(interp, textPtr, argv[arg], &index1) != TCL_OK) { return TCL_ERROR; } lineno = TkBTreeLineIndex(index1.linePtr) + 1; arg++; atEnd = 0; if (argc == arg) { TkTextIndexForwChars(&index1, 1, &index2); } else { if (TkTextGetIndex(interp, textPtr, argv[arg], &index2) != TCL_OK) { return TCL_ERROR; } if (strncmp(argv[arg], "end", strlen(argv[arg])) == 0) { atEnd = 1; } } if (TkTextIndexCmp(&index1, &index2) >= 0) { return TCL_OK; } if (index1.linePtr == index2.linePtr) { DumpLine(interp, textPtr, what, index1.linePtr, index1.byteIndex, index2.byteIndex, lineno, command); } else { DumpLine(interp, textPtr, what, index1.linePtr, index1.byteIndex, 32000000, lineno, command); linePtr = index1.linePtr; while ((linePtr = TkBTreeNextLine(linePtr)) != (TkTextLine *)NULL) { lineno++; if (linePtr == index2.linePtr) { break; } DumpLine(interp, textPtr, what, linePtr, 0, 32000000, lineno, command); } DumpLine(interp, textPtr, what, index2.linePtr, 0, index2.byteIndex, lineno, command); } /* * Special case to get the leftovers hiding at the end mark. */ if (atEnd) { 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: * A standard Tcl result. * * Side effects: * None, but see DumpSegment. */ static void DumpLine(interp, textPtr, what, linePtr, startByte, endByte, lineno, command) Tcl_Interp *interp; TkText *textPtr; int what; /* bit flags to select segment types */ TkTextLine *linePtr; /* The current line */ int startByte, endByte; /* Byte range to dump */ int lineno; /* Line number for indices dump */ char *command; /* Script to apply to the segment */ { int offset; TkTextSegment *segPtr; /* * Must loop through line looking at its segments. * character * toggleOn, toggleOff * mark * image * window */ for (offset = 0, segPtr = linePtr->segPtr ; (offset < endByte) && (segPtr != (TkTextSegment *)NULL) ; offset += segPtr->size, segPtr = segPtr->nextPtr) { if ((what & TK_DUMP_TEXT) && (segPtr->typePtr == &tkTextCharType) && (offset + segPtr->size > startByte)) { char savedChar; /* Last char used in the seg */ int last = segPtr->size; /* Index of savedChar */ int first = 0; /* Index of first char in seg */ if (offset + segPtr->size > endByte) { last = endByte - offset; } if (startByte > offset) { first = startByte - offset; } savedChar = segPtr->body.chars[last]; segPtr->body.chars[last] = '\0'; DumpSegment(interp, "text", segPtr->body.chars + first, command, lineno, offset + first, what); segPtr->body.chars[last] = savedChar; } else if ((offset >= startByte)) { if ((what & TK_DUMP_MARK) && (segPtr->typePtr->name[0] == 'm')) { TkTextMark *markPtr = (TkTextMark *)&segPtr->body; char *name = Tcl_GetHashKey(&textPtr->markTable, markPtr->hPtr); DumpSegment(interp, "mark", name, command, lineno, offset, what); } else if ((what & TK_DUMP_TAG) && (segPtr->typePtr == &tkTextToggleOnType)) { DumpSegment(interp, "tagon", segPtr->body.toggle.tagPtr->name, command, lineno, offset, what); } else if ((what & TK_DUMP_TAG) && (segPtr->typePtr == &tkTextToggleOffType)) { DumpSegment(interp, "tagoff", segPtr->body.toggle.tagPtr->name, command, lineno, offset, what); } else if ((what & TK_DUMP_IMG) && (segPtr->typePtr->name[0] == 'i')) { TkTextEmbImage *eiPtr = (TkTextEmbImage *)&segPtr->body; char *name = (eiPtr->name == NULL) ? "" : eiPtr->name; DumpSegment(interp, "image", name, command, lineno, offset, 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); } DumpSegment(interp, "window", pathname, command, lineno, offset, what); } } } } /* * DumpSegment * Either append information about the current segment to the result, * or make a script callback with that information as arguments. * * Results: * None * * Side effects: * Either evals the callback or appends elements to the result string. */ static int DumpSegment(interp, key, value, command, lineno, offset, what) Tcl_Interp *interp; char *key; /* Segment type key */ char *value; /* Segment value */ char *command; /* Script callback */ int lineno; /* Line number for indices dump */ int offset; /* Byte position */ int what; /* Look for TK_DUMP_INDEX bit */ { char buffer[30]; sprintf(buffer, "%d.%d", lineno, offset); if (command == (char *) NULL) { Tcl_AppendElement(interp, key); Tcl_AppendElement(interp, value); Tcl_AppendElement(interp, buffer); return TCL_OK; } else { char *argv[4]; char *list; int result; argv[0] = key; argv[1] = value; argv[2] = buffer; argv[3] = (char *) NULL; list = Tcl_Merge(3, argv); result = Tcl_VarEval(interp, command, " ", list, (char *) NULL); ckfree(list); return result; } }