tkTextWind.c
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上传日期:2015-12-11
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- /*
- * tkTextWind.c --
- *
- * This file contains code that allows arbitrary windows to be
- * nested inside text widgets. It also implements the "window"
- * widget command for texts.
- *
- * Copyright (c) 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: tkTextWind.c,v 1.6 2002/08/05 04:30:40 dgp Exp $
- */
- #include "tk.h"
- #include "tkText.h"
- #include "tkPort.h"
- /*
- * The following structure is the official type record for the
- * embedded window geometry manager:
- */
- static void EmbWinRequestProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin));
- static void EmbWinLostSlaveProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin));
- static Tk_GeomMgr textGeomType = {
- "text", /* name */
- EmbWinRequestProc, /* requestProc */
- EmbWinLostSlaveProc, /* lostSlaveProc */
- };
- /*
- * Definitions for alignment values:
- */
- #define ALIGN_BOTTOM 0
- #define ALIGN_CENTER 1
- #define ALIGN_TOP 2
- #define ALIGN_BASELINE 3
- /*
- * Macro that determines the size of an embedded window segment:
- */
- #define EW_SEG_SIZE ((unsigned) (Tk_Offset(TkTextSegment, body)
- + sizeof(TkTextEmbWindow)))
- /*
- * Prototypes for procedures defined in this file:
- */
- static int AlignParseProc _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, Tk_Window tkwin,
- CONST char *value, char *widgRec, int offset));
- static char * AlignPrintProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin, char *widgRec, int offset,
- Tcl_FreeProc **freeProcPtr));
- static TkTextSegment * EmbWinCleanupProc _ANSI_ARGS_((TkTextSegment *segPtr,
- TkTextLine *linePtr));
- static void EmbWinCheckProc _ANSI_ARGS_((TkTextSegment *segPtr,
- TkTextLine *linePtr));
- static void EmbWinBboxProc _ANSI_ARGS_((TkTextDispChunk *chunkPtr,
- int index, int y, int lineHeight, int baseline,
- int *xPtr, int *yPtr, int *widthPtr,
- int *heightPtr));
- static int EmbWinConfigure _ANSI_ARGS_((TkText *textPtr,
- TkTextSegment *ewPtr, int argc, CONST char **argv));
- static void EmbWinDelayedUnmap _ANSI_ARGS_((
- ClientData clientData));
- static int EmbWinDeleteProc _ANSI_ARGS_((TkTextSegment *segPtr,
- TkTextLine *linePtr, int treeGone));
- static void EmbWinDisplayProc _ANSI_ARGS_((
- TkTextDispChunk *chunkPtr, int x, int y,
- int lineHeight, int baseline, Display *display,
- Drawable dst, int screenY));
- static int EmbWinLayoutProc _ANSI_ARGS_((TkText *textPtr,
- TkTextIndex *indexPtr, TkTextSegment *segPtr,
- int offset, int maxX, int maxChars,
- int noCharsYet, TkWrapMode wrapMode,
- TkTextDispChunk *chunkPtr));
- static void EmbWinStructureProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static void EmbWinUndisplayProc _ANSI_ARGS_((TkText *textPtr,
- TkTextDispChunk *chunkPtr));
- /*
- * The following structure declares the "embedded window" segment type.
- */
- static Tk_SegType tkTextEmbWindowType = {
- "window", /* name */
- 0, /* leftGravity */
- (Tk_SegSplitProc *) NULL, /* splitProc */
- EmbWinDeleteProc, /* deleteProc */
- EmbWinCleanupProc, /* cleanupProc */
- (Tk_SegLineChangeProc *) NULL, /* lineChangeProc */
- EmbWinLayoutProc, /* layoutProc */
- EmbWinCheckProc /* checkProc */
- };
- /*
- * Information used for parsing window configuration options:
- */
- static Tk_CustomOption alignOption = {AlignParseProc, AlignPrintProc,
- (ClientData) NULL};
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_CUSTOM, "-align", (char *) NULL, (char *) NULL,
- "center", 0, TK_CONFIG_DONT_SET_DEFAULT, &alignOption},
- {TK_CONFIG_STRING, "-create", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextEmbWindow, create),
- TK_CONFIG_DONT_SET_DEFAULT|TK_CONFIG_NULL_OK},
- {TK_CONFIG_INT, "-padx", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(TkTextEmbWindow, padX),
- TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_INT, "-pady", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(TkTextEmbWindow, padY),
- TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_BOOLEAN, "-stretch", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(TkTextEmbWindow, stretch),
- TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_WINDOW, "-window", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(TkTextEmbWindow, tkwin),
- TK_CONFIG_DONT_SET_DEFAULT|TK_CONFIG_NULL_OK},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
- /*
- *--------------------------------------------------------------
- *
- * TkTextWindowCmd --
- *
- * This procedure implements the "window" widget command
- * for text widgets. See the user documentation for details
- * on what it does.
- *
- * Results:
- * A standard Tcl result or error.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
- int
- TkTextWindowCmd(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 "window". */
- {
- size_t length;
- register TkTextSegment *ewPtr;
- if (argc < 3) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " window option ?arg arg ...?"", (char *) NULL);
- return TCL_ERROR;
- }
- length = strlen(argv[2]);
- if ((strncmp(argv[2], "cget", length) == 0) && (length >= 2)) {
- TkTextIndex index;
- TkTextSegment *ewPtr;
- if (argc != 5) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " window cget index option"",
- (char *) NULL);
- return TCL_ERROR;
- }
- if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) {
- return TCL_ERROR;
- }
- ewPtr = TkTextIndexToSeg(&index, (int *) NULL);
- if (ewPtr->typePtr != &tkTextEmbWindowType) {
- Tcl_AppendResult(interp, "no embedded window at index "",
- argv[3], """, (char *) NULL);
- return TCL_ERROR;
- }
- return Tk_ConfigureValue(interp, textPtr->tkwin, configSpecs,
- (char *) &ewPtr->body.ew, argv[4], 0);
- } else if ((strncmp(argv[2], "configure", length) == 0) && (length >= 2)) {
- TkTextIndex index;
- TkTextSegment *ewPtr;
- if (argc < 4) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " window configure index ?option value ...?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) {
- return TCL_ERROR;
- }
- ewPtr = TkTextIndexToSeg(&index, (int *) NULL);
- if (ewPtr->typePtr != &tkTextEmbWindowType) {
- Tcl_AppendResult(interp, "no embedded window at index "",
- argv[3], """, (char *) NULL);
- return TCL_ERROR;
- }
- if (argc == 4) {
- return Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
- (char *) &ewPtr->body.ew, (char *) NULL, 0);
- } else if (argc == 5) {
- return Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
- (char *) &ewPtr->body.ew, argv[4], 0);
- } else {
- TkTextChanged(textPtr, &index, &index);
- return EmbWinConfigure(textPtr, ewPtr, argc-4, argv+4);
- }
- } else if ((strncmp(argv[2], "create", length) == 0) && (length >= 2)) {
- TkTextIndex index;
- int lineIndex;
- /*
- * Add a new window. Find where to put the new window, and
- * mark that position for redisplay.
- */
- if (argc < 4) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " window create index ?option value ...?"",
- (char *) NULL);
- return TCL_ERROR;
- }
- if (TkTextGetIndex(interp, textPtr, argv[3], &index) != TCL_OK) {
- return TCL_ERROR;
- }
- /*
- * Don't allow insertions on the last (dummy) line of the text.
- */
-
- lineIndex = TkBTreeLineIndex(index.linePtr);
- if (lineIndex == TkBTreeNumLines(textPtr->tree)) {
- lineIndex--;
- TkTextMakeByteIndex(textPtr->tree, lineIndex, 1000000, &index);
- }
- /*
- * Create the new window segment and initialize it.
- */
- ewPtr = (TkTextSegment *) ckalloc(EW_SEG_SIZE);
- ewPtr->typePtr = &tkTextEmbWindowType;
- ewPtr->size = 1;
- ewPtr->body.ew.textPtr = textPtr;
- ewPtr->body.ew.linePtr = NULL;
- ewPtr->body.ew.tkwin = NULL;
- ewPtr->body.ew.create = NULL;
- ewPtr->body.ew.align = ALIGN_CENTER;
- ewPtr->body.ew.padX = ewPtr->body.ew.padY = 0;
- ewPtr->body.ew.stretch = 0;
- ewPtr->body.ew.chunkCount = 0;
- ewPtr->body.ew.displayed = 0;
- /*
- * Link the segment into the text widget, then configure it (delete
- * it again if the configuration fails).
- */
- TkTextChanged(textPtr, &index, &index);
- TkBTreeLinkSegment(ewPtr, &index);
- if (EmbWinConfigure(textPtr, ewPtr, argc-4, argv+4) != TCL_OK) {
- TkTextIndex index2;
- TkTextIndexForwChars(&index, 1, &index2);
- TkBTreeDeleteChars(&index, &index2);
- return TCL_ERROR;
- }
- } else if (strncmp(argv[2], "names", length) == 0) {
- Tcl_HashSearch search;
- Tcl_HashEntry *hPtr;
- if (argc != 3) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " window names"", (char *) NULL);
- return TCL_ERROR;
- }
- for (hPtr = Tcl_FirstHashEntry(&textPtr->windowTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendElement(interp,
- Tcl_GetHashKey(&textPtr->markTable, hPtr));
- }
- } else {
- Tcl_AppendResult(interp, "bad window option "", argv[2],
- "": must be cget, configure, create, or names",
- (char *) NULL);
- return TCL_ERROR;
- }
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinConfigure --
- *
- * This procedure is called to handle configuration options
- * for an embedded window, using an argc/argv list.
- *
- * Results:
- * The return value is a standard Tcl result. If TCL_ERROR is
- * returned, then the interp's result contains an error message..
- *
- * Side effects:
- * Configuration information for the embedded window changes,
- * such as alignment, stretching, or name of the embedded
- * window.
- *
- *--------------------------------------------------------------
- */
- static int
- EmbWinConfigure(textPtr, ewPtr, argc, argv)
- TkText *textPtr; /* Information about text widget that
- * contains embedded window. */
- TkTextSegment *ewPtr; /* Embedded window to be configured. */
- int argc; /* Number of strings in argv. */
- CONST char **argv; /* Array of strings describing configuration
- * options. */
- {
- Tk_Window oldWindow;
- Tcl_HashEntry *hPtr;
- int new;
- oldWindow = ewPtr->body.ew.tkwin;
- if (Tk_ConfigureWidget(textPtr->interp, textPtr->tkwin, configSpecs,
- argc, argv, (char *) &ewPtr->body.ew, TK_CONFIG_ARGV_ONLY)
- != TCL_OK) {
- return TCL_ERROR;
- }
- if (oldWindow != ewPtr->body.ew.tkwin) {
- if (oldWindow != NULL) {
- Tcl_DeleteHashEntry(Tcl_FindHashEntry(&textPtr->windowTable,
- Tk_PathName(oldWindow)));
- Tk_DeleteEventHandler(oldWindow, StructureNotifyMask,
- EmbWinStructureProc, (ClientData) ewPtr);
- Tk_ManageGeometry(oldWindow, (Tk_GeomMgr *) NULL,
- (ClientData) NULL);
- if (textPtr->tkwin != Tk_Parent(oldWindow)) {
- Tk_UnmaintainGeometry(oldWindow, textPtr->tkwin);
- } else {
- Tk_UnmapWindow(oldWindow);
- }
- }
- if (ewPtr->body.ew.tkwin != NULL) {
- Tk_Window ancestor, parent;
- /*
- * Make sure that the text is either the parent of the
- * embedded window or a descendant of that parent. Also,
- * don't allow a top-level window to be managed inside
- * a text.
- */
- parent = Tk_Parent(ewPtr->body.ew.tkwin);
- for (ancestor = textPtr->tkwin; ;
- ancestor = Tk_Parent(ancestor)) {
- if (ancestor == parent) {
- break;
- }
- if (Tk_TopWinHierarchy(ancestor)) {
- badMaster:
- Tcl_AppendResult(textPtr->interp, "can't embed ",
- Tk_PathName(ewPtr->body.ew.tkwin), " in ",
- Tk_PathName(textPtr->tkwin), (char *) NULL);
- ewPtr->body.ew.tkwin = NULL;
- return TCL_ERROR;
- }
- }
- if (Tk_TopWinHierarchy(ewPtr->body.ew.tkwin)
- || (ewPtr->body.ew.tkwin == textPtr->tkwin)) {
- goto badMaster;
- }
- /*
- * Take over geometry management for the window, plus create
- * an event handler to find out when it is deleted.
- */
- Tk_ManageGeometry(ewPtr->body.ew.tkwin, &textGeomType,
- (ClientData) ewPtr);
- Tk_CreateEventHandler(ewPtr->body.ew.tkwin, StructureNotifyMask,
- EmbWinStructureProc, (ClientData) ewPtr);
- /*
- * Special trick! Must enter into the hash table *after*
- * calling Tk_ManageGeometry: if the window was already managed
- * elsewhere in this text, the Tk_ManageGeometry call will cause
- * the entry to be removed, which could potentially lose the new
- * entry.
- */
- hPtr = Tcl_CreateHashEntry(&textPtr->windowTable,
- Tk_PathName(ewPtr->body.ew.tkwin), &new);
- Tcl_SetHashValue(hPtr, ewPtr);
- }
- }
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * AlignParseProc --
- *
- * This procedure is invoked by Tk_ConfigureWidget during
- * option processing to handle "-align" options for embedded
- * windows.
- *
- * Results:
- * A standard Tcl return value.
- *
- * Side effects:
- * The alignment for the embedded window may change.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static int
- AlignParseProc(clientData, interp, tkwin, value, widgRec, offset)
- ClientData clientData; /* Not used.*/
- Tcl_Interp *interp; /* Used for reporting errors. */
- Tk_Window tkwin; /* Window for text widget. */
- CONST char *value; /* Value of option. */
- char *widgRec; /* Pointer to TkTextEmbWindow
- * structure. */
- int offset; /* Offset into item (ignored). */
- {
- register TkTextEmbWindow *embPtr = (TkTextEmbWindow *) widgRec;
- if (strcmp(value, "baseline") == 0) {
- embPtr->align = ALIGN_BASELINE;
- } else if (strcmp(value, "bottom") == 0) {
- embPtr->align = ALIGN_BOTTOM;
- } else if (strcmp(value, "center") == 0) {
- embPtr->align = ALIGN_CENTER;
- } else if (strcmp(value, "top") == 0) {
- embPtr->align = ALIGN_TOP;
- } else {
- Tcl_AppendResult(interp, "bad alignment "", value,
- "": must be baseline, bottom, center, or top",
- (char *) NULL);
- return TCL_ERROR;
- }
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * AlignPrintProc --
- *
- * This procedure is invoked by the Tk configuration code
- * to produce a printable string for the "-align" configuration
- * option for embedded windows.
- *
- * Results:
- * The return value is a string describing the embedded
- * window's current alignment.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static char *
- AlignPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
- ClientData clientData; /* Ignored. */
- Tk_Window tkwin; /* Window for text widget. */
- char *widgRec; /* Pointer to TkTextEmbWindow
- * structure. */
- int offset; /* Ignored. */
- Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with
- * information about how to reclaim
- * storage for return string. */
- {
- switch (((TkTextEmbWindow *) widgRec)->align) {
- case ALIGN_BASELINE:
- return "baseline";
- case ALIGN_BOTTOM:
- return "bottom";
- case ALIGN_CENTER:
- return "center";
- case ALIGN_TOP:
- return "top";
- default:
- return "??";
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinStructureProc --
- *
- * This procedure is invoked by the Tk event loop whenever
- * StructureNotify events occur for a window that's embedded
- * in a text widget. This procedure's only purpose is to
- * clean up when windows are deleted.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The window is disassociated from the window segment, and
- * the portion of the text is redisplayed.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinStructureProc(clientData, eventPtr)
- ClientData clientData; /* Pointer to record describing window item. */
- XEvent *eventPtr; /* Describes what just happened. */
- {
- register TkTextSegment *ewPtr = (TkTextSegment *) clientData;
- TkTextIndex index;
- if (eventPtr->type != DestroyNotify) {
- return;
- }
- Tcl_DeleteHashEntry(Tcl_FindHashEntry(&ewPtr->body.ew.textPtr->windowTable,
- Tk_PathName(ewPtr->body.ew.tkwin)));
- ewPtr->body.ew.tkwin = NULL;
- index.tree = ewPtr->body.ew.textPtr->tree;
- index.linePtr = ewPtr->body.ew.linePtr;
- index.byteIndex = TkTextSegToOffset(ewPtr, ewPtr->body.ew.linePtr);
- TkTextChanged(ewPtr->body.ew.textPtr, &index, &index);
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinRequestProc --
- *
- * This procedure is invoked whenever a window that's associated
- * with a window canvas item changes its requested dimensions.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The size and location on the screen of the window may change,
- * depending on the options specified for the window item.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static void
- EmbWinRequestProc(clientData, tkwin)
- ClientData clientData; /* Pointer to record for window item. */
- Tk_Window tkwin; /* Window that changed its desired
- * size. */
- {
- TkTextSegment *ewPtr = (TkTextSegment *) clientData;
- TkTextIndex index;
- index.tree = ewPtr->body.ew.textPtr->tree;
- index.linePtr = ewPtr->body.ew.linePtr;
- index.byteIndex = TkTextSegToOffset(ewPtr, ewPtr->body.ew.linePtr);
- TkTextChanged(ewPtr->body.ew.textPtr, &index, &index);
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinLostSlaveProc --
- *
- * This procedure is invoked by the Tk geometry manager when
- * a slave window managed by a text widget is claimed away
- * by another geometry manager.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The window is disassociated from the window segment, and
- * the portion of the text is redisplayed.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinLostSlaveProc(clientData, tkwin)
- ClientData clientData; /* Pointer to record describing window item. */
- Tk_Window tkwin; /* Window that was claimed away by another
- * geometry manager. */
- {
- register TkTextSegment *ewPtr = (TkTextSegment *) clientData;
- TkTextIndex index;
- Tk_DeleteEventHandler(ewPtr->body.ew.tkwin, StructureNotifyMask,
- EmbWinStructureProc, (ClientData) ewPtr);
- Tcl_CancelIdleCall(EmbWinDelayedUnmap, (ClientData) ewPtr);
- if (ewPtr->body.ew.textPtr->tkwin != Tk_Parent(tkwin)) {
- Tk_UnmaintainGeometry(tkwin, ewPtr->body.ew.textPtr->tkwin);
- } else {
- Tk_UnmapWindow(tkwin);
- }
- Tcl_DeleteHashEntry(Tcl_FindHashEntry(&ewPtr->body.ew.textPtr->windowTable,
- Tk_PathName(ewPtr->body.ew.tkwin)));
- ewPtr->body.ew.tkwin = NULL;
- index.tree = ewPtr->body.ew.textPtr->tree;
- index.linePtr = ewPtr->body.ew.linePtr;
- index.byteIndex = TkTextSegToOffset(ewPtr, ewPtr->body.ew.linePtr);
- TkTextChanged(ewPtr->body.ew.textPtr, &index, &index);
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinDeleteProc --
- *
- * This procedure is invoked by the text B-tree code whenever
- * an embedded window lies in a range of characters being deleted.
- *
- * Results:
- * Returns 0 to indicate that the deletion has been accepted.
- *
- * Side effects:
- * The embedded window is deleted, if it exists, and any resources
- * associated with it are released.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static int
- EmbWinDeleteProc(ewPtr, linePtr, treeGone)
- TkTextSegment *ewPtr; /* Segment being deleted. */
- TkTextLine *linePtr; /* Line containing segment. */
- int treeGone; /* Non-zero means the entire tree is
- * being deleted, so everything must
- * get cleaned up. */
- {
- Tcl_HashEntry *hPtr;
- if (ewPtr->body.ew.tkwin != NULL) {
- hPtr = Tcl_FindHashEntry(&ewPtr->body.ew.textPtr->windowTable,
- Tk_PathName(ewPtr->body.ew.tkwin));
- if (hPtr != NULL) {
- /*
- * (It's possible for there to be no hash table entry for this
- * window, if an error occurred while creating the window segment
- * but before the window got added to the table)
- */
- Tcl_DeleteHashEntry(hPtr);
- }
- /*
- * Delete the event handler for the window before destroying
- * the window, so that EmbWinStructureProc doesn't get called
- * (we'll already do everything that it would have done, and
- * it will just get confused).
- */
- Tk_DeleteEventHandler(ewPtr->body.ew.tkwin, StructureNotifyMask,
- EmbWinStructureProc, (ClientData) ewPtr);
- Tk_DestroyWindow(ewPtr->body.ew.tkwin);
- }
- Tcl_CancelIdleCall(EmbWinDelayedUnmap, (ClientData) ewPtr);
- Tk_FreeOptions(configSpecs, (char *) &ewPtr->body.ew,
- ewPtr->body.ew.textPtr->display, 0);
- ckfree((char *) ewPtr);
- return 0;
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinCleanupProc --
- *
- * This procedure is invoked by the B-tree code whenever a
- * segment containing an embedded window is moved from one
- * line to another.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The linePtr field of the segment gets updated.
- *
- *--------------------------------------------------------------
- */
- static TkTextSegment *
- EmbWinCleanupProc(ewPtr, linePtr)
- TkTextSegment *ewPtr; /* Mark segment that's being moved. */
- TkTextLine *linePtr; /* Line that now contains segment. */
- {
- ewPtr->body.ew.linePtr = linePtr;
- return ewPtr;
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinLayoutProc --
- *
- * This procedure is the "layoutProc" for embedded window
- * segments.
- *
- * Results:
- * 1 is returned to indicate that the segment should be
- * displayed. The chunkPtr structure is filled in.
- *
- * Side effects:
- * None, except for filling in chunkPtr.
- *
- *--------------------------------------------------------------
- */
- /*ARGSUSED*/
- static int
- EmbWinLayoutProc(textPtr, indexPtr, ewPtr, offset, maxX, maxChars,
- noCharsYet, wrapMode, chunkPtr)
- TkText *textPtr; /* Text widget being layed out. */
- TkTextIndex *indexPtr; /* Identifies first character in chunk. */
- TkTextSegment *ewPtr; /* Segment corresponding to indexPtr. */
- int offset; /* Offset within segPtr corresponding to
- * indexPtr (always 0). */
- int maxX; /* Chunk must not occupy pixels at this
- * position or higher. */
- int maxChars; /* Chunk must not include more than this
- * many characters. */
- int noCharsYet; /* Non-zero means no characters have been
- * assigned to this line yet. */
- TkWrapMode wrapMode; /* Wrap mode to use for line: TEXT_WRAPMODE_CHAR,
- * TEXT_WRAPMODE_NONE, or TEXT_WRAPMODE_WORD. */
- register TkTextDispChunk *chunkPtr;
- /* Structure to fill in with information
- * about this chunk. The x field has already
- * been set by the caller. */
- {
- int width, height;
- if (offset != 0) {
- panic("Non-zero offset in EmbWinLayoutProc");
- }
- if ((ewPtr->body.ew.tkwin == NULL) && (ewPtr->body.ew.create != NULL)) {
- int code, new;
- Tcl_DString name;
- Tk_Window ancestor;
- Tcl_HashEntry *hPtr;
- /*
- * The window doesn't currently exist. Create it by evaluating
- * the creation script. The script must return the window's
- * path name: look up that name to get back to the window
- * token. Then register ourselves as the geometry manager for
- * the window.
- */
- code = Tcl_GlobalEval(textPtr->interp, ewPtr->body.ew.create);
- if (code != TCL_OK) {
- createError:
- Tcl_BackgroundError(textPtr->interp);
- goto gotWindow;
- }
- Tcl_DStringInit(&name);
- Tcl_DStringAppend(&name, Tcl_GetStringResult(textPtr->interp), -1);
- Tcl_ResetResult(textPtr->interp);
- ewPtr->body.ew.tkwin = Tk_NameToWindow(textPtr->interp,
- Tcl_DStringValue(&name), textPtr->tkwin);
- if (ewPtr->body.ew.tkwin == NULL) {
- goto createError;
- }
- for (ancestor = textPtr->tkwin; ;
- ancestor = Tk_Parent(ancestor)) {
- if (ancestor == Tk_Parent(ewPtr->body.ew.tkwin)) {
- break;
- }
- if (Tk_TopWinHierarchy(ancestor)) {
- badMaster:
- Tcl_AppendResult(textPtr->interp, "can't embed ",
- Tk_PathName(ewPtr->body.ew.tkwin), " relative to ",
- Tk_PathName(textPtr->tkwin), (char *) NULL);
- Tcl_BackgroundError(textPtr->interp);
- ewPtr->body.ew.tkwin = NULL;
- goto gotWindow;
- }
- }
- if (Tk_TopWinHierarchy(ewPtr->body.ew.tkwin)
- || (textPtr->tkwin == ewPtr->body.ew.tkwin)) {
- goto badMaster;
- }
- Tk_ManageGeometry(ewPtr->body.ew.tkwin, &textGeomType,
- (ClientData) ewPtr);
- Tk_CreateEventHandler(ewPtr->body.ew.tkwin, StructureNotifyMask,
- EmbWinStructureProc, (ClientData) ewPtr);
- /*
- * Special trick! Must enter into the hash table *after*
- * calling Tk_ManageGeometry: if the window was already managed
- * elsewhere in this text, the Tk_ManageGeometry call will cause
- * the entry to be removed, which could potentially lose the new
- * entry.
- */
- hPtr = Tcl_CreateHashEntry(&textPtr->windowTable,
- Tk_PathName(ewPtr->body.ew.tkwin), &new);
- Tcl_SetHashValue(hPtr, ewPtr);
- }
- /*
- * See if there's room for this window on this line.
- */
- gotWindow:
- if (ewPtr->body.ew.tkwin == NULL) {
- width = 0;
- height = 0;
- } else {
- width = Tk_ReqWidth(ewPtr->body.ew.tkwin) + 2*ewPtr->body.ew.padX;
- height = Tk_ReqHeight(ewPtr->body.ew.tkwin) + 2*ewPtr->body.ew.padY;
- }
- if ((width > (maxX - chunkPtr->x))
- && !noCharsYet && (textPtr->wrapMode != TEXT_WRAPMODE_NONE)) {
- return 0;
- }
- /*
- * Fill in the chunk structure.
- */
- chunkPtr->displayProc = EmbWinDisplayProc;
- chunkPtr->undisplayProc = EmbWinUndisplayProc;
- chunkPtr->measureProc = (Tk_ChunkMeasureProc *) NULL;
- chunkPtr->bboxProc = EmbWinBboxProc;
- chunkPtr->numBytes = 1;
- if (ewPtr->body.ew.align == ALIGN_BASELINE) {
- chunkPtr->minAscent = height - ewPtr->body.ew.padY;
- chunkPtr->minDescent = ewPtr->body.ew.padY;
- chunkPtr->minHeight = 0;
- } else {
- chunkPtr->minAscent = 0;
- chunkPtr->minDescent = 0;
- chunkPtr->minHeight = height;
- }
- chunkPtr->width = width;
- chunkPtr->breakIndex = -1;
- chunkPtr->breakIndex = 1;
- chunkPtr->clientData = (ClientData) ewPtr;
- ewPtr->body.ew.chunkCount += 1;
- return 1;
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinCheckProc --
- *
- * This procedure is invoked by the B-tree code to perform
- * consistency checks on embedded windows.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The procedure panics if it detects anything wrong with
- * the embedded window.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinCheckProc(ewPtr, linePtr)
- TkTextSegment *ewPtr; /* Segment to check. */
- TkTextLine *linePtr; /* Line containing segment. */
- {
- if (ewPtr->nextPtr == NULL) {
- panic("EmbWinCheckProc: embedded window is last segment in line");
- }
- if (ewPtr->size != 1) {
- panic("EmbWinCheckProc: embedded window has size %d", ewPtr->size);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinDisplayProc --
- *
- * This procedure is invoked by the text displaying code
- * when it is time to actually draw an embedded window
- * chunk on the screen.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The embedded window gets moved to the correct location
- * and mapped onto the screen.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinDisplayProc(chunkPtr, x, y, lineHeight, baseline, display, dst, screenY)
- TkTextDispChunk *chunkPtr; /* Chunk that is to be drawn. */
- int x; /* X-position in dst at which to
- * draw this chunk (differs from
- * the x-position in the chunk because
- * of scrolling). */
- int y; /* Top of rectangular bounding box
- * for line: tells where to draw this
- * chunk in dst (x-position is in
- * the chunk itself). */
- int lineHeight; /* Total height of line. */
- int baseline; /* Offset of baseline from y. */
- Display *display; /* Display to use for drawing. */
- Drawable dst; /* Pixmap or window in which to draw */
- int screenY; /* Y-coordinate in text window that
- * corresponds to y. */
- {
- TkTextSegment *ewPtr = (TkTextSegment *) chunkPtr->clientData;
- int lineX, windowX, windowY, width, height;
- Tk_Window tkwin;
- tkwin = ewPtr->body.ew.tkwin;
- if (tkwin == NULL) {
- return;
- }
- if ((x + chunkPtr->width) <= 0) {
- /*
- * The window is off-screen; just unmap it.
- */
- if (ewPtr->body.ew.textPtr->tkwin != Tk_Parent(tkwin)) {
- Tk_UnmaintainGeometry(tkwin, ewPtr->body.ew.textPtr->tkwin);
- } else {
- Tk_UnmapWindow(tkwin);
- }
- return;
- }
- /*
- * Compute the window's location and size in the text widget, taking
- * into account the align and stretch values for the window.
- */
- EmbWinBboxProc(chunkPtr, 0, screenY, lineHeight, baseline, &lineX,
- &windowY, &width, &height);
- windowX = lineX - chunkPtr->x + x;
- if (ewPtr->body.ew.textPtr->tkwin == Tk_Parent(tkwin)) {
- if ((windowX != Tk_X(tkwin)) || (windowY != Tk_Y(tkwin))
- || (Tk_ReqWidth(tkwin) != Tk_Width(tkwin))
- || (height != Tk_Height(tkwin))) {
- Tk_MoveResizeWindow(tkwin, windowX, windowY, width, height);
- }
- Tk_MapWindow(tkwin);
- } else {
- Tk_MaintainGeometry(tkwin, ewPtr->body.ew.textPtr->tkwin,
- windowX, windowY, width, height);
- }
- /*
- * Mark the window as displayed so that it won't get unmapped.
- */
- ewPtr->body.ew.displayed = 1;
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinUndisplayProc --
- *
- * This procedure is called when the chunk for an embedded
- * window is no longer going to be displayed. It arranges
- * for the window associated with the chunk to be unmapped.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The window is scheduled for unmapping.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinUndisplayProc(textPtr, chunkPtr)
- TkText *textPtr; /* Overall information about text
- * widget. */
- TkTextDispChunk *chunkPtr; /* Chunk that is about to be freed. */
- {
- TkTextSegment *ewPtr = (TkTextSegment *) chunkPtr->clientData;
- ewPtr->body.ew.chunkCount--;
- if (ewPtr->body.ew.chunkCount == 0) {
- /*
- * Don't unmap the window immediately, since there's a good chance
- * that it will immediately be redisplayed, perhaps even in the
- * same place. Instead, schedule the window to be unmapped later;
- * the call to EmbWinDelayedUnmap will be cancelled in the likely
- * event that the unmap becomes unnecessary.
- */
- ewPtr->body.ew.displayed = 0;
- Tcl_DoWhenIdle(EmbWinDelayedUnmap, (ClientData) ewPtr);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinBboxProc --
- *
- * This procedure is called to compute the bounding box of
- * the area occupied by an embedded window.
- *
- * Results:
- * There is no return value. *xPtr and *yPtr are filled in
- * with the coordinates of the upper left corner of the
- * window, and *widthPtr and *heightPtr are filled in with
- * the dimensions of the window in pixels. Note: not all
- * of the returned bbox is necessarily visible on the screen
- * (the rightmost part might be off-screen to the right,
- * and the bottommost part might be off-screen to the bottom).
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinBboxProc(chunkPtr, index, y, lineHeight, baseline, xPtr, yPtr,
- widthPtr, heightPtr)
- TkTextDispChunk *chunkPtr; /* Chunk containing desired char. */
- int index; /* Index of desired character within
- * the chunk. */
- int y; /* Topmost pixel in area allocated
- * for this line. */
- int lineHeight; /* Total height of line. */
- int baseline; /* Location of line's baseline, in
- * pixels measured down from y. */
- int *xPtr, *yPtr; /* Gets filled in with coords of
- * character's upper-left pixel. */
- int *widthPtr; /* Gets filled in with width of
- * character, in pixels. */
- int *heightPtr; /* Gets filled in with height of
- * character, in pixels. */
- {
- TkTextSegment *ewPtr = (TkTextSegment *) chunkPtr->clientData;
- Tk_Window tkwin;
- tkwin = ewPtr->body.ew.tkwin;
- if (tkwin != NULL) {
- *widthPtr = Tk_ReqWidth(tkwin);
- *heightPtr = Tk_ReqHeight(tkwin);
- } else {
- *widthPtr = 0;
- *heightPtr = 0;
- }
- *xPtr = chunkPtr->x + ewPtr->body.ew.padX;
- if (ewPtr->body.ew.stretch) {
- if (ewPtr->body.ew.align == ALIGN_BASELINE) {
- *heightPtr = baseline - ewPtr->body.ew.padY;
- } else {
- *heightPtr = lineHeight - 2*ewPtr->body.ew.padY;
- }
- }
- switch (ewPtr->body.ew.align) {
- case ALIGN_BOTTOM:
- *yPtr = y + (lineHeight - *heightPtr - ewPtr->body.ew.padY);
- break;
- case ALIGN_CENTER:
- *yPtr = y + (lineHeight - *heightPtr)/2;
- break;
- case ALIGN_TOP:
- *yPtr = y + ewPtr->body.ew.padY;
- break;
- case ALIGN_BASELINE:
- *yPtr = y + (baseline - *heightPtr);
- break;
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * EmbWinDelayedUnmap --
- *
- * This procedure is an idle handler that does the actual
- * work of unmapping an embedded window. See the comment
- * in EmbWinUndisplayProc for details.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The window gets unmapped, unless its chunk reference count
- * has become non-zero again.
- *
- *--------------------------------------------------------------
- */
- static void
- EmbWinDelayedUnmap(clientData)
- ClientData clientData; /* Token for the window to
- * be unmapped. */
- {
- TkTextSegment *ewPtr = (TkTextSegment *) clientData;
- if (!ewPtr->body.ew.displayed && (ewPtr->body.ew.tkwin != NULL)) {
- if (ewPtr->body.ew.textPtr->tkwin != Tk_Parent(ewPtr->body.ew.tkwin)) {
- Tk_UnmaintainGeometry(ewPtr->body.ew.tkwin,
- ewPtr->body.ew.textPtr->tkwin);
- } else {
- Tk_UnmapWindow(ewPtr->body.ew.tkwin);
- }
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * TkTextWindowIndex --
- *
- * Given the name of an embedded window within a text widget,
- * returns an index corresponding to the window's position
- * in the text.
- *
- * Results:
- * The return value is 1 if there is an embedded window by
- * the given name in the text widget, 0 otherwise. If the
- * window exists, *indexPtr is filled in with its index.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- int
- TkTextWindowIndex(textPtr, name, indexPtr)
- TkText *textPtr; /* Text widget containing window. */
- CONST char *name; /* Name of window. */
- TkTextIndex *indexPtr; /* Index information gets stored here. */
- {
- Tcl_HashEntry *hPtr;
- TkTextSegment *ewPtr;
- hPtr = Tcl_FindHashEntry(&textPtr->windowTable, name);
- if (hPtr == NULL) {
- return 0;
- }
- ewPtr = (TkTextSegment *) Tcl_GetHashValue(hPtr);
- indexPtr->tree = textPtr->tree;
- indexPtr->linePtr = ewPtr->body.ew.linePtr;
- indexPtr->byteIndex = TkTextSegToOffset(ewPtr, indexPtr->linePtr);
- return 1;
- }