tkTextTag.c
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:43k
- /*
- * tkTextTag.c --
- *
- * This module implements the "tag" subcommand of the widget command
- * for text widgets, plus most of the other high-level functions
- * related to tags.
- *
- * Copyright (c) 1992-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 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: tkTextTag.c,v 1.8.2.1 2006/10/17 05:38:48 dgp Exp $
- */
- #include "default.h"
- #include "tkPort.h"
- #include "tkInt.h"
- #include "tkText.h"
- static Tk_ConfigSpec tagConfigSpecs[] = {
- {TK_CONFIG_BORDER, "-background", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, border), TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-bgstipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, bgStipple), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-borderwidth", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(TkTextTag, bdString),
- TK_CONFIG_DONT_SET_DEFAULT|TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-elide", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(TkTextTag, elideString),
- TK_CONFIG_DONT_SET_DEFAULT|TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-fgstipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, fgStipple), TK_CONFIG_NULL_OK},
- {TK_CONFIG_FONT, "-font", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, tkfont), TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-foreground", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, fgColor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-justify", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, justifyString), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-lmargin1", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, lMargin1String), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-lmargin2", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, lMargin2String), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-offset", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, offsetString), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-overstrike", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, overstrikeString),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-relief", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, reliefString), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-rmargin", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, rMarginString), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-spacing1", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, spacing1String), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-spacing2", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, spacing2String), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-spacing3", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, spacing3String), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-tabs", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, tabString), TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-underline", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, underlineString),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_CUSTOM, "-wrap", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextTag, wrapMode),
- TK_CONFIG_NULL_OK, &TkTextWrapModeOption},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
- /*
- * Forward declarations for procedures defined later in this file:
- */
- static void ChangeTagPriority _ANSI_ARGS_((TkText *textPtr,
- TkTextTag *tagPtr, int prio));
- static TkTextTag * FindTag _ANSI_ARGS_((Tcl_Interp *interp,
- TkText *textPtr, CONST char *tagName));
- static void SortTags _ANSI_ARGS_((int numTags,
- TkTextTag **tagArrayPtr));
- static int TagSortProc _ANSI_ARGS_((CONST VOID *first,
- CONST VOID *second));
- /*
- *--------------------------------------------------------------
- *
- * TkTextTagCmd --
- *
- * This procedure is invoked to process the "tag" options of
- * the 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.
- *
- *--------------------------------------------------------------
- */
- int
- TkTextTagCmd(textPtr, interp, argc, argv)
- register TkText *textPtr; /* Information about text widget. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- CONST char **argv; /* Argument strings. Someone else has already
- * parsed this command enough to know that
- * argv[1] is "tag". */
- {
- int c, i, addTag;
- size_t length;
- char *fullOption;
- register TkTextTag *tagPtr;
- TkTextIndex first, last, index1, index2;
- if (argc < 3) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag option ?arg arg ...?"", (char *) NULL);
- return TCL_ERROR;
- }
- c = argv[2][0];
- length = strlen(argv[2]);
- if ((c == 'a') && (strncmp(argv[2], "add", length) == 0)) {
- fullOption = "add";
- addTag = 1;
- addAndRemove:
- if (argc < 5) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag ", fullOption,
- " tagName index1 ?index2 index1 index2 ...?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = TkTextCreateTag(textPtr, argv[3]);
- for (i = 4; i < argc; i += 2) {
- if (TkTextGetIndex(interp, textPtr, argv[i], &index1) != TCL_OK) {
- return TCL_ERROR;
- }
- if (argc > (i+1)) {
- if (TkTextGetIndex(interp, textPtr, argv[i+1], &index2)
- != TCL_OK) {
- return TCL_ERROR;
- }
- if (TkTextIndexCmp(&index1, &index2) >= 0) {
- return TCL_OK;
- }
- } else {
- index2 = index1;
- TkTextIndexForwChars(&index2, 1, &index2);
- }
- if (tagPtr->affectsDisplay) {
- TkTextRedrawTag(textPtr, &index1, &index2, tagPtr, !addTag);
- } else {
- /*
- * Still need to trigger enter/leave events on tags that
- * have changed.
- */
- TkTextEventuallyRepick(textPtr);
- }
- TkBTreeTag(&index1, &index2, tagPtr, addTag);
- /*
- * If the tag is "sel" then grab the selection if we're supposed
- * to export it and don't already have it. Also, invalidate
- * partially-completed selection retrievals.
- */
- if (tagPtr == textPtr->selTagPtr) {
- XEvent event;
- /*
- * Send an event that the selection changed.
- * This is equivalent to
- * "event generate $textWidget <<Selection>>"
- */
- memset((VOID *) &event, 0, sizeof(event));
- event.xany.type = VirtualEvent;
- event.xany.serial = NextRequest(Tk_Display(textPtr->tkwin));
- event.xany.send_event = False;
- event.xany.window = Tk_WindowId(textPtr->tkwin);
- event.xany.display = Tk_Display(textPtr->tkwin);
- ((XVirtualEvent *) &event)->name = Tk_GetUid("Selection");
- Tk_HandleEvent(&event);
- if (addTag && textPtr->exportSelection
- && !(textPtr->flags & GOT_SELECTION)) {
- Tk_OwnSelection(textPtr->tkwin, XA_PRIMARY,
- TkTextLostSelection, (ClientData) textPtr);
- textPtr->flags |= GOT_SELECTION;
- }
- textPtr->abortSelections = 1;
- }
- }
- } else if ((c == 'b') && (strncmp(argv[2], "bind", length) == 0)) {
- if ((argc < 4) || (argc > 6)) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag bind tagName ?sequence? ?command?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = TkTextCreateTag(textPtr, argv[3]);
- /*
- * Make a binding table if the widget doesn't already have
- * one.
- */
- if (textPtr->bindingTable == NULL) {
- textPtr->bindingTable = Tk_CreateBindingTable(interp);
- }
- if (argc == 6) {
- int append = 0;
- unsigned long mask;
- if (argv[5][0] == 0) {
- return Tk_DeleteBinding(interp, textPtr->bindingTable,
- (ClientData) tagPtr, argv[4]);
- }
- if (argv[5][0] == '+') {
- argv[5]++;
- append = 1;
- }
- mask = Tk_CreateBinding(interp, textPtr->bindingTable,
- (ClientData) tagPtr, argv[4], argv[5], append);
- if (mask == 0) {
- return TCL_ERROR;
- }
- if (mask & (unsigned) ~(ButtonMotionMask|Button1MotionMask
- |Button2MotionMask|Button3MotionMask|Button4MotionMask
- |Button5MotionMask|ButtonPressMask|ButtonReleaseMask
- |EnterWindowMask|LeaveWindowMask|KeyPressMask
- |KeyReleaseMask|PointerMotionMask|VirtualEventMask)) {
- Tk_DeleteBinding(interp, textPtr->bindingTable,
- (ClientData) tagPtr, argv[4]);
- Tcl_ResetResult(interp);
- Tcl_AppendResult(interp, "requested illegal events; ",
- "only key, button, motion, enter, leave, and virtual ",
- "events may be used", (char *) NULL);
- return TCL_ERROR;
- }
- } else if (argc == 5) {
- CONST char *command;
-
- command = Tk_GetBinding(interp, textPtr->bindingTable,
- (ClientData) tagPtr, argv[4]);
- if (command == NULL) {
- CONST char *string = Tcl_GetStringResult(interp);
- /*
- * Ignore missing binding errors. This is a special hack
- * that relies on the error message returned by FindSequence
- * in tkBind.c.
- */
- if (string[0] != ' ') {
- return TCL_ERROR;
- } else {
- Tcl_ResetResult(interp);
- }
- } else {
- Tcl_SetResult(interp, (char *) command, TCL_STATIC);
- }
- } else {
- Tk_GetAllBindings(interp, textPtr->bindingTable,
- (ClientData) tagPtr);
- }
- } else if ((c == 'c') && (strncmp(argv[2], "cget", length) == 0)
- && (length >= 2)) {
- if (argc != 5) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag cget tagName option"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = FindTag(interp, textPtr, argv[3]);
- if (tagPtr == NULL) {
- return TCL_ERROR;
- }
- return Tk_ConfigureValue(interp, textPtr->tkwin, tagConfigSpecs,
- (char *) tagPtr, argv[4], 0);
- } else if ((c == 'c') && (strncmp(argv[2], "configure", length) == 0)
- && (length >= 2)) {
- if (argc < 4) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag configure tagName ?option? ?value? ",
- "?option value ...?"", (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = TkTextCreateTag(textPtr, argv[3]);
- if (argc == 4) {
- return Tk_ConfigureInfo(interp, textPtr->tkwin, tagConfigSpecs,
- (char *) tagPtr, (char *) NULL, 0);
- } else if (argc == 5) {
- return Tk_ConfigureInfo(interp, textPtr->tkwin, tagConfigSpecs,
- (char *) tagPtr, argv[4], 0);
- } else {
- int result;
- result = Tk_ConfigureWidget(interp, textPtr->tkwin, tagConfigSpecs,
- argc-4, argv+4, (char *) tagPtr, 0);
- /*
- * Some of the configuration options, like -underline
- * and -justify, require additional translation (this is
- * needed because we need to distinguish a particular value
- * of an option from "unspecified").
- */
- if (tagPtr->bdString != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin, tagPtr->bdString,
- &tagPtr->borderWidth) != TCL_OK) {
- return TCL_ERROR;
- }
- if (tagPtr->borderWidth < 0) {
- tagPtr->borderWidth = 0;
- }
- }
- if (tagPtr->reliefString != NULL) {
- if (Tk_GetRelief(interp, tagPtr->reliefString,
- &tagPtr->relief) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->justifyString != NULL) {
- if (Tk_GetJustify(interp, tagPtr->justifyString,
- &tagPtr->justify) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->lMargin1String != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin,
- tagPtr->lMargin1String, &tagPtr->lMargin1) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->lMargin2String != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin,
- tagPtr->lMargin2String, &tagPtr->lMargin2) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->offsetString != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin, tagPtr->offsetString,
- &tagPtr->offset) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->overstrikeString != NULL) {
- if (Tcl_GetBoolean(interp, tagPtr->overstrikeString,
- &tagPtr->overstrike) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->rMarginString != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin,
- tagPtr->rMarginString, &tagPtr->rMargin) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->spacing1String != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin,
- tagPtr->spacing1String, &tagPtr->spacing1) != TCL_OK) {
- return TCL_ERROR;
- }
- if (tagPtr->spacing1 < 0) {
- tagPtr->spacing1 = 0;
- }
- }
- if (tagPtr->spacing2String != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin,
- tagPtr->spacing2String, &tagPtr->spacing2) != TCL_OK) {
- return TCL_ERROR;
- }
- if (tagPtr->spacing2 < 0) {
- tagPtr->spacing2 = 0;
- }
- }
- if (tagPtr->spacing3String != NULL) {
- if (Tk_GetPixels(interp, textPtr->tkwin,
- tagPtr->spacing3String, &tagPtr->spacing3) != TCL_OK) {
- return TCL_ERROR;
- }
- if (tagPtr->spacing3 < 0) {
- tagPtr->spacing3 = 0;
- }
- }
- if (tagPtr->tabArrayPtr != NULL) {
- ckfree((char *) tagPtr->tabArrayPtr);
- tagPtr->tabArrayPtr = NULL;
- }
- if (tagPtr->tabString != NULL) {
- tagPtr->tabArrayPtr = TkTextGetTabs(interp, textPtr->tkwin,
- tagPtr->tabString);
- if (tagPtr->tabArrayPtr == NULL) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->underlineString != NULL) {
- if (Tcl_GetBoolean(interp, tagPtr->underlineString,
- &tagPtr->underline) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- if (tagPtr->elideString != NULL) {
- if (Tcl_GetBoolean(interp, tagPtr->elideString,
- &tagPtr->elide) != TCL_OK) {
- return TCL_ERROR;
- }
- }
- /*
- * If the "sel" tag was changed, be sure to mirror information
- * from the tag back into the text widget record. NOTE: we
- * don't have to free up information in the widget record
- * before overwriting it, because it was mirrored in the tag
- * and hence freed when the tag field was overwritten.
- */
- if (tagPtr == textPtr->selTagPtr) {
- textPtr->selBorder = tagPtr->border;
- textPtr->selBdString = tagPtr->bdString;
- textPtr->selFgColorPtr = tagPtr->fgColor;
- }
- tagPtr->affectsDisplay = 0;
- if ((tagPtr->border != NULL)
- || (tagPtr->bdString != NULL)
- || (tagPtr->reliefString != NULL)
- || (tagPtr->bgStipple != None)
- || (tagPtr->fgColor != NULL) || (tagPtr->tkfont != None)
- || (tagPtr->fgStipple != None)
- || (tagPtr->justifyString != NULL)
- || (tagPtr->lMargin1String != NULL)
- || (tagPtr->lMargin2String != NULL)
- || (tagPtr->offsetString != NULL)
- || (tagPtr->overstrikeString != NULL)
- || (tagPtr->rMarginString != NULL)
- || (tagPtr->spacing1String != NULL)
- || (tagPtr->spacing2String != NULL)
- || (tagPtr->spacing3String != NULL)
- || (tagPtr->tabString != NULL)
- || (tagPtr->underlineString != NULL)
- || (tagPtr->elideString != NULL)
- || (tagPtr->wrapMode != TEXT_WRAPMODE_NULL)) {
- tagPtr->affectsDisplay = 1;
- }
- TkTextRedrawTag(textPtr, (TkTextIndex *) NULL,
- (TkTextIndex *) NULL, tagPtr, 1);
- return result;
- }
- } else if ((c == 'd') && (strncmp(argv[2], "delete", length) == 0)) {
- Tcl_HashEntry *hPtr;
- if (argc < 4) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag delete tagName tagName ..."",
- (char *) NULL);
- return TCL_ERROR;
- }
- for (i = 3; i < argc; i++) {
- hPtr = Tcl_FindHashEntry(&textPtr->tagTable, argv[i]);
- if (hPtr == NULL) {
- continue;
- }
- tagPtr = (TkTextTag *) Tcl_GetHashValue(hPtr);
- if (tagPtr == textPtr->selTagPtr) {
- continue;
- }
- if (tagPtr->affectsDisplay) {
- TkTextRedrawTag(textPtr, (TkTextIndex *) NULL,
- (TkTextIndex *) NULL, tagPtr, 1);
- }
- TkTextMakeByteIndex(textPtr->tree, 0, 0, &first);
- TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree),
- 0, &last),
- TkBTreeTag(&first, &last, tagPtr, 0);
- if (tagPtr == textPtr->selTagPtr) {
- XEvent event;
- /*
- * Send an event that the selection changed.
- * This is equivalent to
- * "event generate $textWidget <<Selection>>"
- */
- memset((VOID *) &event, 0, sizeof(event));
- event.xany.type = VirtualEvent;
- event.xany.serial = NextRequest(Tk_Display(textPtr->tkwin));
- event.xany.send_event = False;
- event.xany.window = Tk_WindowId(textPtr->tkwin);
- event.xany.display = Tk_Display(textPtr->tkwin);
- ((XVirtualEvent *) &event)->name = Tk_GetUid("Selection");
- Tk_HandleEvent(&event);
- }
- Tcl_DeleteHashEntry(hPtr);
- if (textPtr->bindingTable != NULL) {
- Tk_DeleteAllBindings(textPtr->bindingTable,
- (ClientData) tagPtr);
- }
-
- /*
- * Update the tag priorities to reflect the deletion of this tag.
- */
- ChangeTagPriority(textPtr, tagPtr, textPtr->numTags-1);
- textPtr->numTags -= 1;
- TkTextFreeTag(textPtr, tagPtr);
- }
- } else if ((c == 'l') && (strncmp(argv[2], "lower", length) == 0)) {
- TkTextTag *tagPtr2;
- int prio;
- if ((argc != 4) && (argc != 5)) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag lower tagName ?belowThis?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = FindTag(interp, textPtr, argv[3]);
- if (tagPtr == NULL) {
- return TCL_ERROR;
- }
- if (argc == 5) {
- tagPtr2 = FindTag(interp, textPtr, argv[4]);
- if (tagPtr2 == NULL) {
- return TCL_ERROR;
- }
- if (tagPtr->priority < tagPtr2->priority) {
- prio = tagPtr2->priority - 1;
- } else {
- prio = tagPtr2->priority;
- }
- } else {
- prio = 0;
- }
- ChangeTagPriority(textPtr, tagPtr, prio);
- TkTextRedrawTag(textPtr, (TkTextIndex *) NULL, (TkTextIndex *) NULL,
- tagPtr, 1);
- } else if ((c == 'n') && (strncmp(argv[2], "names", length) == 0)
- && (length >= 2)) {
- TkTextTag **arrayPtr;
- int arraySize;
- if ((argc != 3) && (argc != 4)) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag names ?index?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- if (argc == 3) {
- Tcl_HashSearch search;
- Tcl_HashEntry *hPtr;
- arrayPtr = (TkTextTag **) ckalloc((unsigned)
- (textPtr->numTags * sizeof(TkTextTag *)));
- for (i = 0, hPtr = Tcl_FirstHashEntry(&textPtr->tagTable, &search);
- hPtr != NULL; i++, hPtr = Tcl_NextHashEntry(&search)) {
- arrayPtr[i] = (TkTextTag *) Tcl_GetHashValue(hPtr);
- }
- arraySize = textPtr->numTags;
- } else {
- if (TkTextGetIndex(interp, textPtr, argv[3], &index1)
- != TCL_OK) {
- return TCL_ERROR;
- }
- arrayPtr = TkBTreeGetTags(&index1, &arraySize);
- if (arrayPtr == NULL) {
- return TCL_OK;
- }
- }
- SortTags(arraySize, arrayPtr);
- for (i = 0; i < arraySize; i++) {
- tagPtr = arrayPtr[i];
- Tcl_AppendElement(interp, tagPtr->name);
- }
- ckfree((char *) arrayPtr);
- } else if ((c == 'n') && (strncmp(argv[2], "nextrange", length) == 0)
- && (length >= 2)) {
- TkTextSearch tSearch;
- char position[TK_POS_CHARS];
- if ((argc != 5) && (argc != 6)) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag nextrange tagName index1 ?index2?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = FindTag((Tcl_Interp *) NULL, textPtr, argv[3]);
- if (tagPtr == NULL) {
- return TCL_OK;
- }
- if (TkTextGetIndex(interp, textPtr, argv[4], &index1) != TCL_OK) {
- return TCL_ERROR;
- }
- TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree),
- 0, &last);
- if (argc == 5) {
- index2 = last;
- } else if (TkTextGetIndex(interp, textPtr, argv[5], &index2)
- != TCL_OK) {
- return TCL_ERROR;
- }
- /*
- * The search below is a bit tricky. Rather than use the B-tree
- * facilities to stop the search at index2, let it search up
- * until the end of the file but check for a position past index2
- * ourselves. The reason for doing it this way is that we only
- * care whether the *start* of the range is before index2; once
- * we find the start, we don't want TkBTreeNextTag to abort the
- * search because the end of the range is after index2.
- */
- TkBTreeStartSearch(&index1, &last, tagPtr, &tSearch);
- if (TkBTreeCharTagged(&index1, tagPtr)) {
- TkTextSegment *segPtr;
- int offset;
- /*
- * The first character is tagged. See if there is an
- * on-toggle just before the character. If not, then
- * skip to the end of this tagged range.
- */
- for (segPtr = index1.linePtr->segPtr, offset = index1.byteIndex;
- offset >= 0;
- offset -= segPtr->size, segPtr = segPtr->nextPtr) {
- if ((offset == 0) && (segPtr->typePtr == &tkTextToggleOnType)
- && (segPtr->body.toggle.tagPtr == tagPtr)) {
- goto gotStart;
- }
- }
- if (!TkBTreeNextTag(&tSearch)) {
- return TCL_OK;
- }
- }
- /*
- * Find the start of the tagged range.
- */
- if (!TkBTreeNextTag(&tSearch)) {
- return TCL_OK;
- }
- gotStart:
- if (TkTextIndexCmp(&tSearch.curIndex, &index2) >= 0) {
- return TCL_OK;
- }
- TkTextPrintIndex(&tSearch.curIndex, position);
- Tcl_AppendElement(interp, position);
- TkBTreeNextTag(&tSearch);
- TkTextPrintIndex(&tSearch.curIndex, position);
- Tcl_AppendElement(interp, position);
- } else if ((c == 'p') && (strncmp(argv[2], "prevrange", length) == 0)
- && (length >= 2)) {
- TkTextSearch tSearch;
- char position1[TK_POS_CHARS];
- char position2[TK_POS_CHARS];
- if ((argc != 5) && (argc != 6)) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag prevrange tagName index1 ?index2?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = FindTag((Tcl_Interp *) NULL, textPtr, argv[3]);
- if (tagPtr == NULL) {
- return TCL_OK;
- }
- if (TkTextGetIndex(interp, textPtr, argv[4], &index1) != TCL_OK) {
- return TCL_ERROR;
- }
- if (argc == 5) {
- TkTextMakeByteIndex(textPtr->tree, 0, 0, &index2);
- } else if (TkTextGetIndex(interp, textPtr, argv[5], &index2)
- != TCL_OK) {
- return TCL_ERROR;
- }
- /*
- * The search below is a bit weird. The previous toggle can be
- * either an on or off toggle. If it is an on toggle, then we
- * need to turn around and search forward for the end toggle.
- * Otherwise we keep searching backwards.
- */
- TkBTreeStartSearchBack(&index1, &index2, tagPtr, &tSearch);
- if (!TkBTreePrevTag(&tSearch)) {
- return TCL_OK;
- }
- if (tSearch.segPtr->typePtr == &tkTextToggleOnType) {
- TkTextPrintIndex(&tSearch.curIndex, position1);
- TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree),
- 0, &last);
- TkBTreeStartSearch(&tSearch.curIndex, &last, tagPtr, &tSearch);
- TkBTreeNextTag(&tSearch);
- TkTextPrintIndex(&tSearch.curIndex, position2);
- } else {
- TkTextPrintIndex(&tSearch.curIndex, position2);
- TkBTreePrevTag(&tSearch);
- if (TkTextIndexCmp(&tSearch.curIndex, &index2) < 0) {
- return TCL_OK;
- }
- TkTextPrintIndex(&tSearch.curIndex, position1);
- }
- Tcl_AppendElement(interp, position1);
- Tcl_AppendElement(interp, position2);
- } else if ((c == 'r') && (strncmp(argv[2], "raise", length) == 0)
- && (length >= 3)) {
- TkTextTag *tagPtr2;
- int prio;
- if ((argc != 4) && (argc != 5)) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag raise tagName ?aboveThis?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = FindTag(interp, textPtr, argv[3]);
- if (tagPtr == NULL) {
- return TCL_ERROR;
- }
- if (argc == 5) {
- tagPtr2 = FindTag(interp, textPtr, argv[4]);
- if (tagPtr2 == NULL) {
- return TCL_ERROR;
- }
- if (tagPtr->priority <= tagPtr2->priority) {
- prio = tagPtr2->priority;
- } else {
- prio = tagPtr2->priority + 1;
- }
- } else {
- prio = textPtr->numTags-1;
- }
- ChangeTagPriority(textPtr, tagPtr, prio);
- TkTextRedrawTag(textPtr, (TkTextIndex *) NULL, (TkTextIndex *) NULL,
- tagPtr, 1);
- } else if ((c == 'r') && (strncmp(argv[2], "ranges", length) == 0)
- && (length >= 3)) {
- TkTextSearch tSearch;
- char position[TK_POS_CHARS];
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " tag ranges tagName"", (char *) NULL);
- return TCL_ERROR;
- }
- tagPtr = FindTag((Tcl_Interp *) NULL, textPtr, argv[3]);
- if (tagPtr == NULL) {
- return TCL_OK;
- }
- TkTextMakeByteIndex(textPtr->tree, 0, 0, &first);
- TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree),
- 0, &last);
- TkBTreeStartSearch(&first, &last, tagPtr, &tSearch);
- if (TkBTreeCharTagged(&first, tagPtr)) {
- TkTextPrintIndex(&first, position);
- Tcl_AppendElement(interp, position);
- }
- while (TkBTreeNextTag(&tSearch)) {
- TkTextPrintIndex(&tSearch.curIndex, position);
- Tcl_AppendElement(interp, position);
- }
- } else if ((c == 'r') && (strncmp(argv[2], "remove", length) == 0)
- && (length >= 2)) {
- fullOption = "remove";
- addTag = 0;
- goto addAndRemove;
- } else {
- Tcl_AppendResult(interp, "bad tag option "", argv[2],
- "": must be add, bind, cget, configure, delete, lower, ",
- "names, nextrange, raise, ranges, or remove",
- (char *) NULL);
- return TCL_ERROR;
- }
- return TCL_OK;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkTextCreateTag --
- *
- * Find the record describing a tag within a given text widget,
- * creating a new record if one doesn't already exist.
- *
- * Results:
- * The return value is a pointer to the TkTextTag record for tagName.
- *
- * Side effects:
- * A new tag record is created if there isn't one already defined
- * for tagName.
- *
- *----------------------------------------------------------------------
- */
- TkTextTag *
- TkTextCreateTag(textPtr, tagName)
- TkText *textPtr; /* Widget in which tag is being used. */
- CONST char *tagName; /* Name of desired tag. */
- {
- register TkTextTag *tagPtr;
- Tcl_HashEntry *hPtr;
- int new;
- hPtr = Tcl_CreateHashEntry(&textPtr->tagTable, tagName, &new);
- if (!new) {
- return (TkTextTag *) Tcl_GetHashValue(hPtr);
- }
- /*
- * No existing entry. Create a new one, initialize it, and add a
- * pointer to it to the hash table entry.
- */
- tagPtr = (TkTextTag *) ckalloc(sizeof(TkTextTag));
- tagPtr->name = Tcl_GetHashKey(&textPtr->tagTable, hPtr);
- tagPtr->toggleCount = 0;
- tagPtr->tagRootPtr = NULL;
- tagPtr->priority = textPtr->numTags;
- tagPtr->border = NULL;
- tagPtr->bdString = NULL;
- tagPtr->borderWidth = 0;
- tagPtr->reliefString = NULL;
- tagPtr->relief = TK_RELIEF_FLAT;
- tagPtr->bgStipple = None;
- tagPtr->fgColor = NULL;
- tagPtr->tkfont = NULL;
- tagPtr->fgStipple = None;
- tagPtr->justifyString = NULL;
- tagPtr->justify = TK_JUSTIFY_LEFT;
- tagPtr->lMargin1String = NULL;
- tagPtr->lMargin1 = 0;
- tagPtr->lMargin2String = NULL;
- tagPtr->lMargin2 = 0;
- tagPtr->offsetString = NULL;
- tagPtr->offset = 0;
- tagPtr->overstrikeString = NULL;
- tagPtr->overstrike = 0;
- tagPtr->rMarginString = NULL;
- tagPtr->rMargin = 0;
- tagPtr->spacing1String = NULL;
- tagPtr->spacing1 = 0;
- tagPtr->spacing2String = NULL;
- tagPtr->spacing2 = 0;
- tagPtr->spacing3String = NULL;
- tagPtr->spacing3 = 0;
- tagPtr->tabString = NULL;
- tagPtr->tabArrayPtr = NULL;
- tagPtr->underlineString = NULL;
- tagPtr->underline = 0;
- tagPtr->elideString = NULL;
- tagPtr->elide = 0;
- tagPtr->wrapMode = TEXT_WRAPMODE_NULL;
- tagPtr->affectsDisplay = 0;
- textPtr->numTags++;
- Tcl_SetHashValue(hPtr, tagPtr);
- return tagPtr;
- }
- /*
- *----------------------------------------------------------------------
- *
- * FindTag --
- *
- * See if tag is defined for a given widget.
- *
- * Results:
- * If tagName is defined in textPtr, a pointer to its TkTextTag
- * structure is returned. Otherwise NULL is returned and an
- * error message is recorded in the interp's result unless interp
- * is NULL.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static TkTextTag *
- FindTag(interp, textPtr, tagName)
- Tcl_Interp *interp; /* Interpreter to use for error message;
- * if NULL, then don't record an error
- * message. */
- TkText *textPtr; /* Widget in which tag is being used. */
- CONST char *tagName; /* Name of desired tag. */
- {
- Tcl_HashEntry *hPtr;
- hPtr = Tcl_FindHashEntry(&textPtr->tagTable, tagName);
- if (hPtr != NULL) {
- return (TkTextTag *) Tcl_GetHashValue(hPtr);
- }
- if (interp != NULL) {
- Tcl_AppendResult(interp, "tag "", tagName,
- "" isn't defined in text widget", (char *) NULL);
- }
- return NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkTextFreeTag --
- *
- * This procedure is called when a tag is deleted to free up the
- * memory and other resources associated with the tag.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory and other resources are freed.
- *
- *----------------------------------------------------------------------
- */
- void
- TkTextFreeTag(textPtr, tagPtr)
- TkText *textPtr; /* Info about overall widget. */
- register TkTextTag *tagPtr; /* Tag being deleted. */
- {
- if (tagPtr->border != None) {
- Tk_Free3DBorder(tagPtr->border);
- }
- if (tagPtr->bdString != NULL) {
- ckfree(tagPtr->bdString);
- }
- if (tagPtr->reliefString != NULL) {
- ckfree(tagPtr->reliefString);
- }
- if (tagPtr->bgStipple != None) {
- Tk_FreeBitmap(textPtr->display, tagPtr->bgStipple);
- }
- if (tagPtr->fgColor != None) {
- Tk_FreeColor(tagPtr->fgColor);
- }
- Tk_FreeFont(tagPtr->tkfont);
- if (tagPtr->fgStipple != None) {
- Tk_FreeBitmap(textPtr->display, tagPtr->fgStipple);
- }
- if (tagPtr->justifyString != NULL) {
- ckfree(tagPtr->justifyString);
- }
- if (tagPtr->lMargin1String != NULL) {
- ckfree(tagPtr->lMargin1String);
- }
- if (tagPtr->lMargin2String != NULL) {
- ckfree(tagPtr->lMargin2String);
- }
- if (tagPtr->offsetString != NULL) {
- ckfree(tagPtr->offsetString);
- }
- if (tagPtr->overstrikeString != NULL) {
- ckfree(tagPtr->overstrikeString);
- }
- if (tagPtr->rMarginString != NULL) {
- ckfree(tagPtr->rMarginString);
- }
- if (tagPtr->spacing1String != NULL) {
- ckfree(tagPtr->spacing1String);
- }
- if (tagPtr->spacing2String != NULL) {
- ckfree(tagPtr->spacing2String);
- }
- if (tagPtr->spacing3String != NULL) {
- ckfree(tagPtr->spacing3String);
- }
- if (tagPtr->tabString != NULL) {
- ckfree(tagPtr->tabString);
- }
- if (tagPtr->tabArrayPtr != NULL) {
- ckfree((char *) tagPtr->tabArrayPtr);
- }
- if (tagPtr->underlineString != NULL) {
- ckfree(tagPtr->underlineString);
- }
- ckfree((char *) tagPtr);
- }
- /*
- *----------------------------------------------------------------------
- *
- * SortTags --
- *
- * This procedure sorts an array of tag pointers in increasing
- * order of priority, optimizing for the common case where the
- * array is small.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static void
- SortTags(numTags, tagArrayPtr)
- int numTags; /* Number of tag pointers at *tagArrayPtr. */
- TkTextTag **tagArrayPtr; /* Pointer to array of pointers. */
- {
- int i, j, prio;
- register TkTextTag **tagPtrPtr;
- TkTextTag **maxPtrPtr, *tmp;
- if (numTags < 2) {
- return;
- }
- if (numTags < 20) {
- for (i = numTags-1; i > 0; i--, tagArrayPtr++) {
- maxPtrPtr = tagPtrPtr = tagArrayPtr;
- prio = tagPtrPtr[0]->priority;
- for (j = i, tagPtrPtr++; j > 0; j--, tagPtrPtr++) {
- if (tagPtrPtr[0]->priority < prio) {
- prio = tagPtrPtr[0]->priority;
- maxPtrPtr = tagPtrPtr;
- }
- }
- tmp = *maxPtrPtr;
- *maxPtrPtr = *tagArrayPtr;
- *tagArrayPtr = tmp;
- }
- } else {
- qsort((VOID *) tagArrayPtr, (unsigned) numTags, sizeof (TkTextTag *),
- TagSortProc);
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TagSortProc --
- *
- * This procedure is called by qsort when sorting an array of
- * tags in priority order.
- *
- * Results:
- * The return value is -1 if the first argument should be before
- * the second element (i.e. it has lower priority), 0 if it's
- * equivalent (this should never happen!), and 1 if it should be
- * after the second element.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static int
- TagSortProc(first, second)
- CONST VOID *first, *second; /* Elements to be compared. */
- {
- TkTextTag *tagPtr1, *tagPtr2;
- tagPtr1 = * (TkTextTag **) first;
- tagPtr2 = * (TkTextTag **) second;
- return tagPtr1->priority - tagPtr2->priority;
- }
- /*
- *----------------------------------------------------------------------
- *
- * ChangeTagPriority --
- *
- * This procedure changes the priority of a tag by modifying
- * its priority and the priorities of other tags that are affected
- * by the change.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Priorities may be changed for some or all of the tags in
- * textPtr. The tags will be arranged so that there is exactly
- * one tag at each priority level between 0 and textPtr->numTags-1,
- * with tagPtr at priority "prio".
- *
- *----------------------------------------------------------------------
- */
- static void
- ChangeTagPriority(textPtr, tagPtr, prio)
- TkText *textPtr; /* Information about text widget. */
- TkTextTag *tagPtr; /* Tag whose priority is to be
- * changed. */
- int prio; /* New priority for tag. */
- {
- int low, high, delta;
- register TkTextTag *tagPtr2;
- Tcl_HashEntry *hPtr;
- Tcl_HashSearch search;
- if (prio < 0) {
- prio = 0;
- }
- if (prio >= textPtr->numTags) {
- prio = textPtr->numTags-1;
- }
- if (prio == tagPtr->priority) {
- return;
- } else if (prio < tagPtr->priority) {
- low = prio;
- high = tagPtr->priority-1;
- delta = 1;
- } else {
- low = tagPtr->priority+1;
- high = prio;
- delta = -1;
- }
- for (hPtr = Tcl_FirstHashEntry(&textPtr->tagTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- tagPtr2 = (TkTextTag *) Tcl_GetHashValue(hPtr);
- if ((tagPtr2->priority >= low) && (tagPtr2->priority <= high)) {
- tagPtr2->priority += delta;
- }
- }
- tagPtr->priority = prio;
- }
- /*
- *--------------------------------------------------------------
- *
- * TkTextBindProc --
- *
- * This procedure is invoked by the Tk dispatcher to handle
- * events associated with bindings on items.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Depends on the command invoked as part of the binding
- * (if there was any).
- *
- *--------------------------------------------------------------
- */
- void
- TkTextBindProc(clientData, eventPtr)
- ClientData clientData; /* Pointer to canvas structure. */
- XEvent *eventPtr; /* Pointer to X event that just
- * happened. */
- {
- TkText *textPtr = (TkText *) clientData;
- int repick = 0;
- # define AnyButtonMask (Button1Mask|Button2Mask|Button3Mask
- |Button4Mask|Button5Mask)
- Tcl_Preserve((ClientData) textPtr);
- /*
- * This code simulates grabs for mouse buttons by keeping track
- * of whether a button is pressed and refusing to pick a new current
- * character while a button is pressed.
- */
- if (eventPtr->type == ButtonPress) {
- textPtr->flags |= BUTTON_DOWN;
- } else if (eventPtr->type == ButtonRelease) {
- int mask;
- switch (eventPtr->xbutton.button) {
- case Button1:
- mask = Button1Mask;
- break;
- case Button2:
- mask = Button2Mask;
- break;
- case Button3:
- mask = Button3Mask;
- break;
- case Button4:
- mask = Button4Mask;
- break;
- case Button5:
- mask = Button5Mask;
- break;
- default:
- mask = 0;
- break;
- }
- if ((eventPtr->xbutton.state & AnyButtonMask) == (unsigned) mask) {
- textPtr->flags &= ~BUTTON_DOWN;
- repick = 1;
- }
- } else if ((eventPtr->type == EnterNotify)
- || (eventPtr->type == LeaveNotify)) {
- if (eventPtr->xcrossing.state & AnyButtonMask) {
- textPtr->flags |= BUTTON_DOWN;
- } else {
- textPtr->flags &= ~BUTTON_DOWN;
- }
- TkTextPickCurrent(textPtr, eventPtr);
- goto done;
- } else if (eventPtr->type == MotionNotify) {
- if (eventPtr->xmotion.state & AnyButtonMask) {
- textPtr->flags |= BUTTON_DOWN;
- } else {
- textPtr->flags &= ~BUTTON_DOWN;
- }
- TkTextPickCurrent(textPtr, eventPtr);
- }
- if ((textPtr->numCurTags > 0) && (textPtr->bindingTable != NULL)
- && (textPtr->tkwin != NULL)) {
- Tk_BindEvent(textPtr->bindingTable, eventPtr, textPtr->tkwin,
- textPtr->numCurTags, (ClientData *) textPtr->curTagArrayPtr);
- }
- if (repick) {
- unsigned int oldState;
- oldState = eventPtr->xbutton.state;
- eventPtr->xbutton.state &= ~(Button1Mask|Button2Mask
- |Button3Mask|Button4Mask|Button5Mask);
- TkTextPickCurrent(textPtr, eventPtr);
- eventPtr->xbutton.state = oldState;
- }
- done:
- Tcl_Release((ClientData) textPtr);
- }
- /*
- *--------------------------------------------------------------
- *
- * TkTextPickCurrent --
- *
- * Find the character containing the coordinates in an event
- * and place the "current" mark on that character. If the
- * "current" mark has moved then generate a fake leave event
- * on the old current character and a fake enter event on the new
- * current character.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The current mark for textPtr may change. If it does,
- * then the commands associated with character entry and leave
- * could do just about anything. For example, the text widget
- * might be deleted. It is up to the caller to protect itself
- * with calls to Tcl_Preserve and Tcl_Release.
- *
- *--------------------------------------------------------------
- */
- void
- TkTextPickCurrent(textPtr, eventPtr)
- register TkText *textPtr; /* Text widget in which to select
- * current character. */
- XEvent *eventPtr; /* Event describing location of
- * mouse cursor. Must be EnterWindow,
- * LeaveWindow, ButtonRelease, or
- * MotionNotify. */
- {
- TkTextIndex index;
- TkTextTag **oldArrayPtr, **newArrayPtr;
- TkTextTag **copyArrayPtr = NULL; /* Initialization needed to prevent
- * compiler warning. */
- int numOldTags, numNewTags, i, j, size;
- XEvent event;
- /*
- * If a button is down, then don't do anything at all; we'll be
- * called again when all buttons are up, and we can repick then.
- * This implements a form of mouse grabbing.
- */
- if (textPtr->flags & BUTTON_DOWN) {
- if (((eventPtr->type == EnterNotify) || (eventPtr->type == LeaveNotify))
- && ((eventPtr->xcrossing.mode == NotifyGrab)
- || (eventPtr->xcrossing.mode == NotifyUngrab))) {
- /*
- * Special case: the window is being entered or left because
- * of a grab or ungrab. In this case, repick after all.
- * Furthermore, clear BUTTON_DOWN to release the simulated
- * grab.
- */
- textPtr->flags &= ~BUTTON_DOWN;
- } else {
- return;
- }
- }
- /*
- * Save information about this event in the widget in case we have
- * to synthesize more enter and leave events later (e.g. because a
- * character was deleted, causing a new character to be underneath
- * the mouse cursor). Also translate MotionNotify events into
- * EnterNotify events, since that's what gets reported to event
- * handlers when the current character changes.
- */
- if (eventPtr != &textPtr->pickEvent) {
- if ((eventPtr->type == MotionNotify)
- || (eventPtr->type == ButtonRelease)) {
- textPtr->pickEvent.xcrossing.type = EnterNotify;
- textPtr->pickEvent.xcrossing.serial = eventPtr->xmotion.serial;
- textPtr->pickEvent.xcrossing.send_event
- = eventPtr->xmotion.send_event;
- textPtr->pickEvent.xcrossing.display = eventPtr->xmotion.display;
- textPtr->pickEvent.xcrossing.window = eventPtr->xmotion.window;
- textPtr->pickEvent.xcrossing.root = eventPtr->xmotion.root;
- textPtr->pickEvent.xcrossing.subwindow = None;
- textPtr->pickEvent.xcrossing.time = eventPtr->xmotion.time;
- textPtr->pickEvent.xcrossing.x = eventPtr->xmotion.x;
- textPtr->pickEvent.xcrossing.y = eventPtr->xmotion.y;
- textPtr->pickEvent.xcrossing.x_root = eventPtr->xmotion.x_root;
- textPtr->pickEvent.xcrossing.y_root = eventPtr->xmotion.y_root;
- textPtr->pickEvent.xcrossing.mode = NotifyNormal;
- textPtr->pickEvent.xcrossing.detail = NotifyNonlinear;
- textPtr->pickEvent.xcrossing.same_screen
- = eventPtr->xmotion.same_screen;
- textPtr->pickEvent.xcrossing.focus = False;
- textPtr->pickEvent.xcrossing.state = eventPtr->xmotion.state;
- } else {
- textPtr->pickEvent = *eventPtr;
- }
- }
- /*
- * Find the new current character, then find and sort all of the
- * tags associated with it.
- */
- if (textPtr->pickEvent.type != LeaveNotify) {
- TkTextPixelIndex(textPtr, textPtr->pickEvent.xcrossing.x,
- textPtr->pickEvent.xcrossing.y, &index);
- newArrayPtr = TkBTreeGetTags(&index, &numNewTags);
- SortTags(numNewTags, newArrayPtr);
- } else {
- newArrayPtr = NULL;
- numNewTags = 0;
- }
- /*
- * Resort the tags associated with the previous marked character
- * (the priorities might have changed), then make a copy of the
- * new tags, and compare the old tags to the copy, nullifying
- * any tags that are present in both groups (i.e. the tags that
- * haven't changed).
- */
- SortTags(textPtr->numCurTags, textPtr->curTagArrayPtr);
- if (numNewTags > 0) {
- size = numNewTags * sizeof(TkTextTag *);
- copyArrayPtr = (TkTextTag **) ckalloc((unsigned) size);
- memcpy((VOID *) copyArrayPtr, (VOID *) newArrayPtr, (size_t) size);
- for (i = 0; i < textPtr->numCurTags; i++) {
- for (j = 0; j < numNewTags; j++) {
- if (textPtr->curTagArrayPtr[i] == copyArrayPtr[j]) {
- textPtr->curTagArrayPtr[i] = NULL;
- copyArrayPtr[j] = NULL;
- break;
- }
- }
- }
- }
- /*
- * Invoke the binding system with a LeaveNotify event for all of
- * the tags that have gone away. We have to be careful here,
- * because it's possible that the binding could do something
- * (like calling tkwait) that eventually modifies
- * textPtr->curTagArrayPtr. To avoid problems in situations like
- * this, update curTagArrayPtr to its new value before invoking
- * any bindings, and don't use it any more here.
- */
- numOldTags = textPtr->numCurTags;
- textPtr->numCurTags = numNewTags;
- oldArrayPtr = textPtr->curTagArrayPtr;
- textPtr->curTagArrayPtr = newArrayPtr;
- if (numOldTags != 0) {
- if ((textPtr->bindingTable != NULL) && (textPtr->tkwin != NULL)) {
- event = textPtr->pickEvent;
- event.type = LeaveNotify;
- /*
- * Always use a detail of NotifyAncestor. Besides being
- * consistent, this avoids problems where the binding code
- * will discard NotifyInferior events.
- */
- event.xcrossing.detail = NotifyAncestor;
- Tk_BindEvent(textPtr->bindingTable, &event, textPtr->tkwin,
- numOldTags, (ClientData *) oldArrayPtr);
- }
- ckfree((char *) oldArrayPtr);
- }
- /*
- * Reset the "current" mark (be careful to recompute its location,
- * since it might have changed during an event binding). Then
- * invoke the binding system with an EnterNotify event for all of
- * the tags that have just appeared.
- */
- TkTextPixelIndex(textPtr, textPtr->pickEvent.xcrossing.x,
- textPtr->pickEvent.xcrossing.y, &index);
- TkTextSetMark(textPtr, "current", &index);
- if (numNewTags != 0) {
- if ((textPtr->bindingTable != NULL) && (textPtr->tkwin != NULL)) {
- event = textPtr->pickEvent;
- event.type = EnterNotify;
- event.xcrossing.detail = NotifyAncestor;
- Tk_BindEvent(textPtr->bindingTable, &event, textPtr->tkwin,
- numNewTags, (ClientData *) copyArrayPtr);
- }
- ckfree((char *) copyArrayPtr);
- }
- }