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authorrjohnson <rjohnson>1998-04-01 09:51:44 (GMT)
committerrjohnson <rjohnson>1998-04-01 09:51:44 (GMT)
commit066ea7fd88d49cb456f74da71dbe875e4fc0aabb (patch)
tree8fb30cb152c4dc191be47fa043d2e6f5ea38c7ba /generic/tkText.c
parent13242623d2ff3ea02ab6a62bfb48a7dbb5c27e22 (diff)
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Initial revision
Diffstat (limited to 'generic/tkText.c')
-rw-r--r--generic/tkText.c2264
1 files changed, 2264 insertions, 0 deletions
diff --git a/generic/tkText.c b/generic/tkText.c
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--- /dev/null
+++ b/generic/tkText.c
@@ -0,0 +1,2264 @@
+/*
+ * 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.
+ *
+ * SCCS: @(#) tkText.c 1.104 97/10/13 15:18:24
+ */
+
+#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}
+};
+
+/*
+ * Tk_Uid's used to represent text states:
+ */
+
+Tk_Uid tkTextCharUid = NULL;
+Tk_Uid tkTextDisabledUid = NULL;
+Tk_Uid tkTextNoneUid = NULL;
+Tk_Uid tkTextNormalUid = NULL;
+Tk_Uid tkTextWordUid = NULL;
+
+/*
+ * 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;
+ }
+
+ /*
+ * Perform once-only initialization:
+ */
+
+ if (tkTextNormalUid == NULL) {
+ tkTextCharUid = Tk_GetUid("char");
+ tkTextDisabledUid = Tk_GetUid("disabled");
+ tkTextNoneUid = Tk_GetUid("none");
+ tkTextNormalUid = Tk_GetUid("normal");
+ tkTextWordUid = Tk_GetUid("word");
+ }
+
+ /*
+ * 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 = tkTextNormalUid;
+ 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 = tkTextCharUid;
+ textPtr->width = 0;
+ textPtr->height = 0;
+ textPtr->setGrid = 0;
+ textPtr->prevWidth = Tk_Width(new);
+ textPtr->prevHeight = Tk_Height(new);
+ TkTextCreateDInfo(textPtr);
+ TkTextMakeIndex(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(7);
+ 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;
+ }
+ interp->result = Tk_PathName(textPtr->tkwin);
+
+ 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) {
+ sprintf(interp->result, "%d %d %d %d", x, y, width, height);
+ }
+ } 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;
+ }
+ interp->result = (value) ? "1" : "0";
+ } 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) {
+ interp->result = (tkBTreeDebug) ? "1" : "0";
+ } 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 == tkTextNormalUid) {
+ 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) {
+ sprintf(interp->result, "%d %d %d %d %d", x, y, width,
+ height, base);
+ }
+ } 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.charIndex == index1.charIndex) {
+ break;
+ }
+ last2 = index2.charIndex - index1.charIndex + 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;
+ }
+ TkTextIndexForwChars(&index1, last-offset, &index1);
+ }
+ } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)
+ && (length >= 3)) {
+ 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, interp->result);
+ } 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 == tkTextNormalUid) {
+ for (j = 3; j < argc; j += 2) {
+ InsertChars(textPtr, &index1, argv[j]);
+ if (argc > (j+1)) {
+ TkTextIndexForwChars(&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 interp->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 != tkTextNormalUid)
+ && (textPtr->state != tkTextDisabledUid)) {
+ Tcl_AppendResult(interp, "bad state value \"", textPtr->state,
+ "\": must be normal or disabled", (char *) NULL);
+ textPtr->state = tkTextNormalUid;
+ return TCL_ERROR;
+ }
+
+ if ((textPtr->wrapMode != tkTextCharUid)
+ && (textPtr->wrapMode != tkTextNoneUid)
+ && (textPtr->wrapMode != tkTextWordUid)) {
+ Tcl_AppendResult(interp, "bad wrap mode \"", textPtr->wrapMode,
+ "\": must be char, none, or word", (char *) NULL);
+ textPtr->wrapMode = tkTextCharUid;
+ 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;
+
+ TkTextMakeIndex(textPtr->tree, 0, 0, &first);
+ TkTextMakeIndex(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--;
+ TkTextMakeIndex(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.charIndex;
+ if (offset > indexPtr->charIndex) {
+ offset += strlen(string);
+ }
+ }
+ TkTextChanged(textPtr, indexPtr, indexPtr);
+ TkBTreeInsertChars(indexPtr, string);
+ if (resetView) {
+ TkTextMakeIndex(textPtr->tree, lineIndex, 0, &newTop);
+ TkTextIndexForwChars(&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, charIndex, 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.charIndex == 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 = line = charIndex = 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;
+ charIndex = index1.charIndex;
+ } 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;
+ charIndex = textPtr->topIndex.charIndex;
+ }
+ } 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;
+ charIndex = textPtr->topIndex.charIndex;
+ if (index1.linePtr != index2.linePtr) {
+ charIndex -= index2.charIndex;
+ } else {
+ charIndex -= (index2.charIndex - index1.charIndex);
+ }
+ }
+ TkBTreeDeleteChars(&index1, &index2);
+ if (resetView) {
+ TkTextMakeIndex(textPtr->tree, line, charIndex, &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) {
+ TkTextMakeIndex(textPtr->tree, 0, 0, &textPtr->selIndex);
+ textPtr->abortSelections = 0;
+ } else if (textPtr->abortSelections) {
+ return 0;
+ }
+ TkTextMakeIndex(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.charIndex
+ - textPtr->selIndex.charIndex;
+ 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;
+ }
+ TkTextIndexForwChars(&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.
+ */
+
+ TkTextMakeIndex(textPtr->tree, 0, 0, &start);
+ TkTextMakeIndex(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, startingChar, lineNum, firstChar, lastChar;
+ int code, matchLength, matchChar, 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)) {
+ interp->result = "no value given for \"-count\" option";
+ 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);
+ for (p = pattern; *p != 0; p++) {
+ if (isupper(UCHAR(*p))) {
+ *p = tolower(UCHAR(*p));
+ }
+ }
+ }
+
+ if (TkTextGetIndex(interp, textPtr, argv[i+1], &index) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ numLines = TkBTreeNumLines(textPtr->tree);
+ startingLine = TkBTreeLineIndex(index.linePtr);
+ startingChar = index.charIndex;
+ if (startingLine >= numLines) {
+ if (backwards) {
+ startingLine = TkBTreeNumLines(textPtr->tree) - 1;
+ startingChar = TkBTreeCharsInLine(TkBTreeFindLine(textPtr->tree,
+ startingLine));
+ } else {
+ startingLine = 0;
+ startingChar = 0;
+ }
+ }
+ if (argsLeft == 1) {
+ if (TkTextGetIndex(interp, textPtr, argv[i+2], &stopIndex) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ 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) {
+ return TCL_ERROR;
+ }
+ }
+ lineNum = startingLine;
+ code = TCL_OK;
+ Tcl_DStringInit(&line);
+ 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) {
+ for (p = Tcl_DStringValue(&line); *p != 0; p++) {
+ if (isupper(UCHAR(*p))) {
+ *p = tolower(UCHAR(*p));
+ }
+ }
+ }
+
+ /*
+ * 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.
+ */
+
+ matchChar = -1;
+ firstChar = 0;
+ lastChar = 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 = startingChar;
+ for (segPtr = linePtr->segPtr, leftToScan = startingChar;
+ 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.
+ */
+
+ firstChar = indexInDString;
+ if (firstChar >= Tcl_DStringLength(&line)) {
+ goto nextLine;
+ }
+ } else {
+ /*
+ * Use only the first part of the line.
+ */
+
+ lastChar = indexInDString;
+ }
+ }
+ do {
+ int thisLength;
+ if (exact) {
+ p = strstr(startOfLine + firstChar, pattern);
+ if (p == NULL) {
+ break;
+ }
+ i = p - startOfLine;
+ thisLength = patLength;
+ } else {
+ char *start, *end;
+ int match;
+
+ match = Tcl_RegExpExec(interp, regexp,
+ startOfLine + firstChar, 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 >= lastChar) {
+ break;
+ }
+ matchChar = i;
+ matchLength = thisLength;
+ firstChar = matchChar+1;
+ } 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 (matchChar >= 0) {
+ /*
+ * 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 = matchChar;
+ leftToScan >= 0; segPtr = segPtr->nextPtr) {
+ if (segPtr->typePtr != &tkTextCharType) {
+ matchChar += segPtr->size;
+ continue;
+ }
+ leftToScan -= segPtr->size;
+ }
+ for (leftToScan += matchLength; leftToScan > 0;
+ segPtr = segPtr->nextPtr) {
+ if (segPtr->typePtr != &tkTextCharType) {
+ matchLength += segPtr->size;
+ continue;
+ }
+ leftToScan -= segPtr->size;
+ }
+ TkTextMakeIndex(textPtr->tree, lineNum, matchChar, &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", matchLength);
+ if (Tcl_SetVar(interp, varName, buffer, TCL_LEAVE_ERR_MSG)
+ == NULL) {
+ code = TCL_ERROR;
+ goto done;
+ }
+ }
+ TkTextPrintIndex(&index, interp->result);
+ 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
+ * interp->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;
+
+ 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;
+ }
+ c = UCHAR(argv[i+1][0]);
+ if (!isalpha(c)) {
+ continue;
+ }
+ i += 1;
+ 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.charIndex, index2.charIndex, lineno, command);
+ } else {
+ DumpLine(interp, textPtr, what, index1.linePtr,
+ index1.charIndex, 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.charIndex, 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, start, end, lineno, command)
+ Tcl_Interp *interp;
+ TkText *textPtr;
+ int what; /* bit flags to select segment types */
+ TkTextLine *linePtr; /* The current line */
+ int start, end; /* Character 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 < end) && (segPtr != (TkTextSegment *)NULL) ;
+ offset += segPtr->size, segPtr = segPtr->nextPtr) {
+ if ((what & TK_DUMP_TEXT) && (segPtr->typePtr == &tkTextCharType) &&
+ (offset + segPtr->size > start)) {
+ 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 > end) {
+ last = end - offset;
+ }
+ if (start > offset) {
+ first = start - 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 >= start)) {
+ 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; /* Character 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;
+ }
+}
+