tkUtil.c
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:32k
- /*
- * tkUtil.c --
- *
- * This file contains miscellaneous utility procedures that
- * are used by the rest of Tk, such as a procedure for drawing
- * a focus highlight.
- *
- * 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: tkUtil.c,v 1.12.2.1 2004/10/27 00:37:38 davygrvy Exp $
- */
- #include "tkInt.h"
- #include "tkPort.h"
- /*
- * The structure below defines the implementation of the "statekey"
- * Tcl object, used for quickly finding a mapping in a TkStateMap.
- */
- Tcl_ObjType tkStateKeyObjType = {
- "statekey", /* name */
- (Tcl_FreeInternalRepProc *) NULL, /* freeIntRepProc */
- (Tcl_DupInternalRepProc *) NULL, /* dupIntRepProc */
- (Tcl_UpdateStringProc *) NULL, /* updateStringProc */
- (Tcl_SetFromAnyProc *) NULL /* setFromAnyProc */
- };
- /*
- *--------------------------------------------------------------
- *
- * TkStateParseProc --
- *
- * This procedure is invoked during option processing to handle
- * the "-state" and "-default" options.
- *
- * Results:
- * A standard Tcl return value.
- *
- * Side effects:
- * The state for a given item gets replaced by the state
- * indicated in the value argument.
- *
- *--------------------------------------------------------------
- */
- int
- TkStateParseProc(clientData, interp, tkwin, value, widgRec, offset)
- ClientData clientData; /* some flags.*/
- Tcl_Interp *interp; /* Used for reporting errors. */
- Tk_Window tkwin; /* Window containing canvas widget. */
- CONST char *value; /* Value of option. */
- char *widgRec; /* Pointer to record for item. */
- int offset; /* Offset into item. */
- {
- int c;
- int flags = (int)clientData;
- size_t length;
- register Tk_State *statePtr = (Tk_State *) (widgRec + offset);
- if(value == NULL || *value == 0) {
- *statePtr = TK_STATE_NULL;
- return TCL_OK;
- }
- c = value[0];
- length = strlen(value);
- if ((c == 'n') && (strncmp(value, "normal", length) == 0)) {
- *statePtr = TK_STATE_NORMAL;
- return TCL_OK;
- }
- if ((c == 'd') && (strncmp(value, "disabled", length) == 0)) {
- *statePtr = TK_STATE_DISABLED;
- return TCL_OK;
- }
- if ((c == 'a') && (flags&1) && (strncmp(value, "active", length) == 0)) {
- *statePtr = TK_STATE_ACTIVE;
- return TCL_OK;
- }
- if ((c == 'h') && (flags&2) && (strncmp(value, "hidden", length) == 0)) {
- *statePtr = TK_STATE_HIDDEN;
- return TCL_OK;
- }
- Tcl_AppendResult(interp, "bad ", (flags&4)?"-default" : "state",
- " value "", value, "": must be normal",
- (char *) NULL);
- if (flags&1) {
- Tcl_AppendResult(interp, ", active",(char *) NULL);
- }
- if (flags&2) {
- Tcl_AppendResult(interp, ", hidden",(char *) NULL);
- }
- if (flags&3) {
- Tcl_AppendResult(interp, ",",(char *) NULL);
- }
- Tcl_AppendResult(interp, " or disabled",(char *) NULL);
- *statePtr = TK_STATE_NORMAL;
- return TCL_ERROR;
- }
- /*
- *--------------------------------------------------------------
- *
- * TkStatePrintProc --
- *
- * This procedure is invoked by the Tk configuration code
- * to produce a printable string for the "-state"
- * configuration option.
- *
- * Results:
- * The return value is a string describing the state for
- * the item referred to by "widgRec". In addition, *freeProcPtr
- * is filled in with the address of a procedure to call to free
- * the result string when it's no longer needed (or NULL to
- * indicate that the string doesn't need to be freed).
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- char *
- TkStatePrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
- ClientData clientData; /* Ignored. */
- Tk_Window tkwin; /* Window containing canvas widget. */
- char *widgRec; /* Pointer to record for item. */
- int offset; /* Offset into item. */
- Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with
- * information about how to reclaim
- * storage for return string. */
- {
- register Tk_State *statePtr = (Tk_State *) (widgRec + offset);
- if (*statePtr==TK_STATE_NORMAL) {
- return "normal";
- } else if (*statePtr==TK_STATE_DISABLED) {
- return "disabled";
- } else if (*statePtr==TK_STATE_HIDDEN) {
- return "hidden";
- } else if (*statePtr==TK_STATE_ACTIVE) {
- return "active";
- } else {
- return "";
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * TkOrientParseProc --
- *
- * This procedure is invoked during option processing to handle
- * the "-orient" option.
- *
- * Results:
- * A standard Tcl return value.
- *
- * Side effects:
- * The orientation for a given item gets replaced by the orientation
- * indicated in the value argument.
- *
- *--------------------------------------------------------------
- */
- int
- TkOrientParseProc(clientData, interp, tkwin, value, widgRec, offset)
- ClientData clientData; /* some flags.*/
- Tcl_Interp *interp; /* Used for reporting errors. */
- Tk_Window tkwin; /* Window containing canvas widget. */
- CONST char *value; /* Value of option. */
- char *widgRec; /* Pointer to record for item. */
- int offset; /* Offset into item. */
- {
- int c;
- size_t length;
- register int *orientPtr = (int *) (widgRec + offset);
- if(value == NULL || *value == 0) {
- *orientPtr = 0;
- return TCL_OK;
- }
- c = value[0];
- length = strlen(value);
- if ((c == 'h') && (strncmp(value, "horizontal", length) == 0)) {
- *orientPtr = 0;
- return TCL_OK;
- }
- if ((c == 'v') && (strncmp(value, "vertical", length) == 0)) {
- *orientPtr = 1;
- return TCL_OK;
- }
- Tcl_AppendResult(interp, "bad orientation "", value,
- "": must be vertical or horizontal",
- (char *) NULL);
- *orientPtr = 0;
- return TCL_ERROR;
- }
- /*
- *--------------------------------------------------------------
- *
- * TkOrientPrintProc --
- *
- * This procedure is invoked by the Tk configuration code
- * to produce a printable string for the "-orient"
- * configuration option.
- *
- * Results:
- * The return value is a string describing the orientation for
- * the item referred to by "widgRec". In addition, *freeProcPtr
- * is filled in with the address of a procedure to call to free
- * the result string when it's no longer needed (or NULL to
- * indicate that the string doesn't need to be freed).
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- char *
- TkOrientPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
- ClientData clientData; /* Ignored. */
- Tk_Window tkwin; /* Window containing canvas widget. */
- char *widgRec; /* Pointer to record for item. */
- int offset; /* Offset into item. */
- Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with
- * information about how to reclaim
- * storage for return string. */
- {
- register int *statePtr = (int *) (widgRec + offset);
- if (*statePtr) {
- return "vertical";
- } else {
- return "horizontal";
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkOffsetParseProc --
- *
- * Converts the offset of a stipple or tile into the Tk_TSOffset structure.
- *
- *----------------------------------------------------------------------
- */
- int
- TkOffsetParseProc(clientData, interp, tkwin, value, widgRec, offset)
- ClientData clientData; /* not used */
- Tcl_Interp *interp; /* Interpreter to send results back to */
- Tk_Window tkwin; /* Window on same display as tile */
- CONST char *value; /* Name of image */
- char *widgRec; /* Widget structure record */
- int offset; /* Offset of tile in record */
- {
- Tk_TSOffset *offsetPtr = (Tk_TSOffset *)(widgRec + offset);
- Tk_TSOffset tsoffset;
- CONST char *q, *p;
- int result;
- if ((value == NULL) || (*value == 0)) {
- tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_MIDDLE;
- goto goodTSOffset;
- }
- tsoffset.flags = 0;
- p = value;
- switch(value[0]) {
- case '#':
- if (((int)clientData) & TK_OFFSET_RELATIVE) {
- tsoffset.flags = TK_OFFSET_RELATIVE;
- p++; break;
- }
- goto badTSOffset;
- case 'e':
- switch(value[1]) {
- case ' ':
- tsoffset.flags = TK_OFFSET_RIGHT|TK_OFFSET_MIDDLE;
- goto goodTSOffset;
- case 'n':
- if (value[2]!='d' || value[3]!=' ') {goto badTSOffset;}
- tsoffset.flags = INT_MAX;
- goto goodTSOffset;
- }
- case 'w':
- if (value[1] != ' ') {goto badTSOffset;}
- tsoffset.flags = TK_OFFSET_LEFT|TK_OFFSET_MIDDLE;
- goto goodTSOffset;
- case 'n':
- if ((value[1] != ' ') && (value[2] != ' ')) {
- goto badTSOffset;
- }
- switch(value[1]) {
- case ' ': tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_TOP;
- goto goodTSOffset;
- case 'w': tsoffset.flags = TK_OFFSET_LEFT|TK_OFFSET_TOP;
- goto goodTSOffset;
- case 'e': tsoffset.flags = TK_OFFSET_RIGHT|TK_OFFSET_TOP;
- goto goodTSOffset;
- }
- goto badTSOffset;
- case 's':
- if ((value[1] != ' ') && (value[2] != ' ')) {
- goto badTSOffset;
- }
- switch(value[1]) {
- case ' ': tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_BOTTOM;
- goto goodTSOffset;
- case 'w': tsoffset.flags = TK_OFFSET_LEFT|TK_OFFSET_BOTTOM;
- goto goodTSOffset;
- case 'e': tsoffset.flags = TK_OFFSET_RIGHT|TK_OFFSET_BOTTOM;
- goto goodTSOffset;
- }
- goto badTSOffset;
- case 'c':
- if (strncmp(value, "center", strlen(value)) != 0) {
- goto badTSOffset;
- }
- tsoffset.flags = TK_OFFSET_CENTER|TK_OFFSET_MIDDLE;
- goto goodTSOffset;
- }
- if ((q = strchr(p,',')) == NULL) {
- if (((int)clientData) & TK_OFFSET_INDEX) {
- if (Tcl_GetInt(interp, (char *) p, &tsoffset.flags) != TCL_OK) {
- Tcl_ResetResult(interp);
- goto badTSOffset;
- }
- tsoffset.flags |= TK_OFFSET_INDEX;
- goto goodTSOffset;
- }
- goto badTSOffset;
- }
- *((char *) q) = 0;
- result = Tk_GetPixels(interp, tkwin, (char *) p, &tsoffset.xoffset);
- *((char *) q) = ',';
- if (result != TCL_OK) {
- return TCL_ERROR;
- }
- if (Tk_GetPixels(interp, tkwin, (char *) q+1, &tsoffset.yoffset) != TCL_OK) {
- return TCL_ERROR;
- }
- goodTSOffset:
- /* below is a hack to allow the stipple/tile offset to be stored
- * in the internal tile structure. Most of the times, offsetPtr
- * is a pointer to an already existing tile structure. However
- * if this structure is not already created, we must do it
- * with Tk_GetTile()!!!!;
- */
- memcpy(offsetPtr,&tsoffset, sizeof(Tk_TSOffset));
- return TCL_OK;
- badTSOffset:
- Tcl_AppendResult(interp, "bad offset "", value,
- "": expected "x,y"", (char *) NULL);
- if (((int) clientData) & TK_OFFSET_RELATIVE) {
- Tcl_AppendResult(interp, ", "#x,y"", (char *) NULL);
- }
- if (((int) clientData) & TK_OFFSET_INDEX) {
- Tcl_AppendResult(interp, ", <index>", (char *) NULL);
- }
- Tcl_AppendResult(interp, ", n, ne, e, se, s, sw, w, nw, or center",
- (char *) NULL);
- return TCL_ERROR;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkOffsetPrintProc --
- *
- * Returns the offset of the tile.
- *
- * Results:
- * The offset of the tile is returned.
- *
- *----------------------------------------------------------------------
- */
- char *
- TkOffsetPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
- ClientData clientData; /* not used */
- Tk_Window tkwin; /* not used */
- char *widgRec; /* Widget structure record */
- int offset; /* Offset of tile in record */
- Tcl_FreeProc **freeProcPtr; /* not used */
- {
- Tk_TSOffset *offsetPtr = (Tk_TSOffset *)(widgRec + offset);
- char *p, *q;
- if ((offsetPtr->flags) & TK_OFFSET_INDEX) {
- if ((offsetPtr->flags) >= INT_MAX) {
- return "end";
- }
- p = (char *) ckalloc(32);
- sprintf(p, "%d",(offsetPtr->flags & (~TK_OFFSET_INDEX)));
- *freeProcPtr = TCL_DYNAMIC;
- return p;
- }
- if ((offsetPtr->flags) & TK_OFFSET_TOP) {
- if ((offsetPtr->flags) & TK_OFFSET_LEFT) {
- return "nw";
- } else if ((offsetPtr->flags) & TK_OFFSET_CENTER) {
- return "n";
- } else if ((offsetPtr->flags) & TK_OFFSET_RIGHT) {
- return "ne";
- }
- } else if ((offsetPtr->flags) & TK_OFFSET_MIDDLE) {
- if ((offsetPtr->flags) & TK_OFFSET_LEFT) {
- return "w";
- } else if ((offsetPtr->flags) & TK_OFFSET_CENTER) {
- return "center";
- } else if ((offsetPtr->flags) & TK_OFFSET_RIGHT) {
- return "e";
- }
- } else if ((offsetPtr->flags) & TK_OFFSET_BOTTOM) {
- if ((offsetPtr->flags) & TK_OFFSET_LEFT) {
- return "sw";
- } else if ((offsetPtr->flags) & TK_OFFSET_CENTER) {
- return "s";
- } else if ((offsetPtr->flags) & TK_OFFSET_RIGHT) {
- return "se";
- }
- }
- q = p = (char *) ckalloc(32);
- if ((offsetPtr->flags) & TK_OFFSET_RELATIVE) {
- *q++ = '#';
- }
- sprintf(q, "%d,%d",offsetPtr->xoffset, offsetPtr->yoffset);
- *freeProcPtr = TCL_DYNAMIC;
- return p;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkPixelParseProc --
- *
- * Converts the name of an image into a tile.
- *
- *----------------------------------------------------------------------
- */
- int
- TkPixelParseProc(clientData, interp, tkwin, value, widgRec, offset)
- ClientData clientData; /* if non-NULL, negative values are
- * allowed as well */
- Tcl_Interp *interp; /* Interpreter to send results back to */
- Tk_Window tkwin; /* Window on same display as tile */
- CONST char *value; /* Name of image */
- char *widgRec; /* Widget structure record */
- int offset; /* Offset of tile in record */
- {
- double *doublePtr = (double *)(widgRec + offset);
- int result;
- result = TkGetDoublePixels(interp, tkwin, value, doublePtr);
- if ((result == TCL_OK) && (clientData == NULL) && (*doublePtr < 0.0)) {
- Tcl_AppendResult(interp, "bad screen distance "", value,
- """, (char *) NULL);
- return TCL_ERROR;
- }
- return result;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkPixelPrintProc --
- *
- * Returns the name of the tile.
- *
- * Results:
- * The name of the tile is returned.
- *
- *----------------------------------------------------------------------
- */
- char *
- TkPixelPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
- ClientData clientData; /* not used */
- Tk_Window tkwin; /* not used */
- char *widgRec; /* Widget structure record */
- int offset; /* Offset of tile in record */
- Tcl_FreeProc **freeProcPtr; /* not used */
- {
- double *doublePtr = (double *)(widgRec + offset);
- char *p;
- p = (char *) ckalloc(24);
- Tcl_PrintDouble((Tcl_Interp *) NULL, *doublePtr, p);
- *freeProcPtr = TCL_DYNAMIC;
- return p;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkDrawInsetFocusHighlight --
- *
- * This procedure draws a rectangular ring around the outside of
- * a widget to indicate that it has received the input focus. It
- * takes an additional padding argument that specifies how much
- * padding is present outside th widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A rectangle "width" pixels wide is drawn in "drawable",
- * corresponding to the outer area of "tkwin".
- *
- *----------------------------------------------------------------------
- */
- void
- TkDrawInsetFocusHighlight(tkwin, gc, width, drawable, padding)
- Tk_Window tkwin; /* Window whose focus highlight ring is
- * to be drawn. */
- GC gc; /* Graphics context to use for drawing
- * the highlight ring. */
- int width; /* Width of the highlight ring, in pixels. */
- Drawable drawable; /* Where to draw the ring (typically a
- * pixmap for double buffering). */
- int padding; /* Width of padding outside of widget. */
- {
- XRectangle rects[4];
- rects[0].x = padding;
- rects[0].y = padding;
- rects[0].width = Tk_Width(tkwin) - (2 * padding);
- rects[0].height = width;
- rects[1].x = padding;
- rects[1].y = Tk_Height(tkwin) - width - padding;
- rects[1].width = Tk_Width(tkwin) - (2 * padding);
- rects[1].height = width;
- rects[2].x = padding;
- rects[2].y = width + padding;
- rects[2].width = width;
- rects[2].height = Tk_Height(tkwin) - 2*width - 2*padding;
- rects[3].x = Tk_Width(tkwin) - width - padding;
- rects[3].y = rects[2].y;
- rects[3].width = width;
- rects[3].height = rects[2].height;
- XFillRectangles(Tk_Display(tkwin), drawable, gc, rects, 4);
- }
- /*
- *----------------------------------------------------------------------
- *
- * Tk_DrawFocusHighlight --
- *
- * This procedure draws a rectangular ring around the outside of
- * a widget to indicate that it has received the input focus.
- *
- * This function is now deprecated. Use TkpDrawHighlightBorder instead,
- * since this function does not handle drawing the Focus ring properly
- * on the Macintosh - you need to know the background GC as well
- * as the foreground since the Mac focus ring separated from the widget
- * by a 1 pixel border.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A rectangle "width" pixels wide is drawn in "drawable",
- * corresponding to the outer area of "tkwin".
- *
- *----------------------------------------------------------------------
- */
- void
- Tk_DrawFocusHighlight(tkwin, gc, width, drawable)
- Tk_Window tkwin; /* Window whose focus highlight ring is
- * to be drawn. */
- GC gc; /* Graphics context to use for drawing
- * the highlight ring. */
- int width; /* Width of the highlight ring, in pixels. */
- Drawable drawable; /* Where to draw the ring (typically a
- * pixmap for double buffering). */
- {
- TkDrawInsetFocusHighlight(tkwin, gc, width, drawable, 0);
- }
- /*
- *----------------------------------------------------------------------
- *
- * Tk_GetScrollInfo --
- *
- * This procedure is invoked to parse "xview" and "yview"
- * scrolling commands for widgets using the new scrolling
- * command syntax ("moveto" or "scroll" options).
- *
- * Results:
- * The return value is either TK_SCROLL_MOVETO, TK_SCROLL_PAGES,
- * TK_SCROLL_UNITS, or TK_SCROLL_ERROR. This indicates whether
- * the command was successfully parsed and what form the command
- * took. If TK_SCROLL_MOVETO, *dblPtr is filled in with the
- * desired position; if TK_SCROLL_PAGES or TK_SCROLL_UNITS,
- * *intPtr is filled in with the number of lines to move (may be
- * negative); if TK_SCROLL_ERROR, the interp's result contains an
- * error message.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- int
- Tk_GetScrollInfo(interp, argc, argv, dblPtr, intPtr)
- Tcl_Interp *interp; /* Used for error reporting. */
- int argc; /* # arguments for command. */
- CONST char **argv; /* Arguments for command. */
- double *dblPtr; /* Filled in with argument "moveto"
- * option, if any. */
- int *intPtr; /* Filled in with number of pages
- * or lines to scroll, if any. */
- {
- int c;
- size_t length;
- length = strlen(argv[2]);
- c = argv[2][0];
- if ((c == 'm') && (strncmp(argv[2], "moveto", length) == 0)) {
- if (argc != 4) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " ", argv[1], " moveto fraction"",
- (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- if (Tcl_GetDouble(interp, argv[3], dblPtr) != TCL_OK) {
- return TK_SCROLL_ERROR;
- }
- return TK_SCROLL_MOVETO;
- } else if ((c == 's')
- && (strncmp(argv[2], "scroll", length) == 0)) {
- if (argc != 5) {
- Tcl_AppendResult(interp, "wrong # args: should be "",
- argv[0], " ", argv[1], " scroll number units|pages"",
- (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- if (Tcl_GetInt(interp, argv[3], intPtr) != TCL_OK) {
- return TK_SCROLL_ERROR;
- }
- length = strlen(argv[4]);
- c = argv[4][0];
- if ((c == 'p') && (strncmp(argv[4], "pages", length) == 0)) {
- return TK_SCROLL_PAGES;
- } else if ((c == 'u')
- && (strncmp(argv[4], "units", length) == 0)) {
- return TK_SCROLL_UNITS;
- } else {
- Tcl_AppendResult(interp, "bad argument "", argv[4],
- "": must be units or pages", (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- }
- Tcl_AppendResult(interp, "unknown option "", argv[2],
- "": must be moveto or scroll", (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- /*
- *----------------------------------------------------------------------
- *
- * Tk_GetScrollInfoObj --
- *
- * This procedure is invoked to parse "xview" and "yview"
- * scrolling commands for widgets using the new scrolling
- * command syntax ("moveto" or "scroll" options).
- *
- * Results:
- * The return value is either TK_SCROLL_MOVETO, TK_SCROLL_PAGES,
- * TK_SCROLL_UNITS, or TK_SCROLL_ERROR. This indicates whether
- * the command was successfully parsed and what form the command
- * took. If TK_SCROLL_MOVETO, *dblPtr is filled in with the
- * desired position; if TK_SCROLL_PAGES or TK_SCROLL_UNITS,
- * *intPtr is filled in with the number of lines to move (may be
- * negative); if TK_SCROLL_ERROR, the interp's result contains an
- * error message.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- int
- Tk_GetScrollInfoObj(interp, objc, objv, dblPtr, intPtr)
- Tcl_Interp *interp; /* Used for error reporting. */
- int objc; /* # arguments for command. */
- Tcl_Obj *CONST objv[]; /* Arguments for command. */
- double *dblPtr; /* Filled in with argument "moveto"
- * option, if any. */
- int *intPtr; /* Filled in with number of pages
- * or lines to scroll, if any. */
- {
- int c;
- size_t length;
- char *arg2, *arg4;
- arg2 = Tcl_GetString(objv[2]);
- length = strlen(arg2);
- c = arg2[0];
- if ((c == 'm') && (strncmp(arg2, "moveto", length) == 0)) {
- if (objc != 4) {
- Tcl_WrongNumArgs(interp, 2, objv, "moveto fraction");
- return TK_SCROLL_ERROR;
- }
- if (Tcl_GetDoubleFromObj(interp, objv[3], dblPtr) != TCL_OK) {
- return TK_SCROLL_ERROR;
- }
- return TK_SCROLL_MOVETO;
- } else if ((c == 's')
- && (strncmp(arg2, "scroll", length) == 0)) {
- if (objc != 5) {
- Tcl_WrongNumArgs(interp, 2, objv, "scroll number units|pages");
- return TK_SCROLL_ERROR;
- }
- if (Tcl_GetIntFromObj(interp, objv[3], intPtr) != TCL_OK) {
- return TK_SCROLL_ERROR;
- }
- arg4 = Tcl_GetString(objv[4]);
- length = (strlen(arg4));
- c = arg4[0];
- if ((c == 'p') && (strncmp(arg4, "pages", length) == 0)) {
- return TK_SCROLL_PAGES;
- } else if ((c == 'u')
- && (strncmp(arg4, "units", length) == 0)) {
- return TK_SCROLL_UNITS;
- } else {
- Tcl_AppendResult(interp, "bad argument "", arg4,
- "": must be units or pages", (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- }
- Tcl_AppendResult(interp, "unknown option "", arg2,
- "": must be moveto or scroll", (char *) NULL);
- return TK_SCROLL_ERROR;
- }
- /*
- *---------------------------------------------------------------------------
- *
- * TkComputeAnchor --
- *
- * Determine where to place a rectangle so that it will be properly
- * anchored with respect to the given window. Used by widgets
- * to align a box of text inside a window. When anchoring with
- * respect to one of the sides, the rectangle be placed inside of
- * the internal border of the window.
- *
- * Results:
- * *xPtr and *yPtr set to the upper-left corner of the rectangle
- * anchored in the window.
- *
- * Side effects:
- * None.
- *
- *---------------------------------------------------------------------------
- */
- void
- TkComputeAnchor(anchor, tkwin, padX, padY, innerWidth, innerHeight, xPtr, yPtr)
- Tk_Anchor anchor; /* Desired anchor. */
- Tk_Window tkwin; /* Anchored with respect to this window. */
- int padX, padY; /* Use this extra padding inside window, in
- * addition to the internal border. */
- int innerWidth, innerHeight;/* Size of rectangle to anchor in window. */
- int *xPtr, *yPtr; /* Returns upper-left corner of anchored
- * rectangle. */
- {
- switch (anchor) {
- case TK_ANCHOR_NW:
- case TK_ANCHOR_W:
- case TK_ANCHOR_SW:
- *xPtr = Tk_InternalBorderLeft(tkwin) + padX;
- break;
- case TK_ANCHOR_N:
- case TK_ANCHOR_CENTER:
- case TK_ANCHOR_S:
- *xPtr = (Tk_Width(tkwin) - innerWidth) / 2;
- break;
- default:
- *xPtr = Tk_Width(tkwin) - (Tk_InternalBorderRight(tkwin) + padX)
- - innerWidth;
- break;
- }
- switch (anchor) {
- case TK_ANCHOR_NW:
- case TK_ANCHOR_N:
- case TK_ANCHOR_NE:
- *yPtr = Tk_InternalBorderTop(tkwin) + padY;
- break;
- case TK_ANCHOR_W:
- case TK_ANCHOR_CENTER:
- case TK_ANCHOR_E:
- *yPtr = (Tk_Height(tkwin) - innerHeight) / 2;
- break;
- default:
- *yPtr = Tk_Height(tkwin) - Tk_InternalBorderBottom(tkwin) - padY
- - innerHeight;
- break;
- }
- }
- /*
- *---------------------------------------------------------------------------
- *
- * TkFindStateString --
- *
- * Given a lookup table, map a number to a string in the table.
- *
- * Results:
- * If numKey was equal to the numeric key of one of the elements
- * in the table, returns the string key of that element.
- * Returns NULL if numKey was not equal to any of the numeric keys
- * in the table.
- *
- * Side effects.
- * None.
- *
- *---------------------------------------------------------------------------
- */
- char *
- TkFindStateString(mapPtr, numKey)
- CONST TkStateMap *mapPtr; /* The state table. */
- int numKey; /* The key to try to find in the table. */
- {
- for ( ; mapPtr->strKey != NULL; mapPtr++) {
- if (numKey == mapPtr->numKey) {
- return mapPtr->strKey;
- }
- }
- return NULL;
- }
- /*
- *---------------------------------------------------------------------------
- *
- * TkFindStateNum --
- *
- * Given a lookup table, map a string to a number in the table.
- *
- * Results:
- * If strKey was equal to the string keys of one of the elements
- * in the table, returns the numeric key of that element.
- * Returns the numKey associated with the last element (the NULL
- * string one) in the table if strKey was not equal to any of the
- * string keys in the table. In that case, an error message is
- * also left in the interp's result (if interp is not NULL).
- *
- * Side effects.
- * None.
- *
- *---------------------------------------------------------------------------
- */
- int
- TkFindStateNum(interp, option, mapPtr, strKey)
- Tcl_Interp *interp; /* Interp for error reporting. */
- CONST char *option; /* String to use when constructing error. */
- CONST TkStateMap *mapPtr; /* Lookup table. */
- CONST char *strKey; /* String to try to find in lookup table. */
- {
- CONST TkStateMap *mPtr;
- for (mPtr = mapPtr; mPtr->strKey != NULL; mPtr++) {
- if (strcmp(strKey, mPtr->strKey) == 0) {
- return mPtr->numKey;
- }
- }
- if (interp != NULL) {
- mPtr = mapPtr;
- Tcl_AppendResult(interp, "bad ", option, " value "", strKey,
- "": must be ", mPtr->strKey, (char *) NULL);
- for (mPtr++; mPtr->strKey != NULL; mPtr++) {
- Tcl_AppendResult(interp,
- ((mPtr[1].strKey != NULL) ? ", " : ", or "),
- mPtr->strKey, (char *) NULL);
- }
- }
- return mPtr->numKey;
- }
- int
- TkFindStateNumObj(interp, optionPtr, mapPtr, keyPtr)
- Tcl_Interp *interp; /* Interp for error reporting. */
- Tcl_Obj *optionPtr; /* String to use when constructing error. */
- CONST TkStateMap *mapPtr; /* Lookup table. */
- Tcl_Obj *keyPtr; /* String key to find in lookup table. */
- {
- CONST TkStateMap *mPtr;
- CONST char *key;
- CONST Tcl_ObjType *typePtr;
- if ((keyPtr->typePtr == &tkStateKeyObjType)
- && (keyPtr->internalRep.twoPtrValue.ptr1 == (VOID *) mapPtr)) {
- return (int) keyPtr->internalRep.twoPtrValue.ptr2;
- }
- key = Tcl_GetStringFromObj(keyPtr, NULL);
- for (mPtr = mapPtr; mPtr->strKey != NULL; mPtr++) {
- if (strcmp(key, mPtr->strKey) == 0) {
- typePtr = keyPtr->typePtr;
- if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
- (*typePtr->freeIntRepProc)(keyPtr);
- }
- keyPtr->internalRep.twoPtrValue.ptr1 = (VOID *) mapPtr;
- keyPtr->internalRep.twoPtrValue.ptr2 = (VOID *) mPtr->numKey;
- keyPtr->typePtr = &tkStateKeyObjType;
- return mPtr->numKey;
- }
- }
- if (interp != NULL) {
- mPtr = mapPtr;
- Tcl_AppendResult(interp, "bad ",
- Tcl_GetStringFromObj(optionPtr, NULL), " value "", key,
- "": must be ", mPtr->strKey, (char *) NULL);
- for (mPtr++; mPtr->strKey != NULL; mPtr++) {
- Tcl_AppendResult(interp,
- ((mPtr[1].strKey != NULL) ? ", " : ", or "),
- mPtr->strKey, (char *) NULL);
- }
- }
- return mPtr->numKey;
- }
- /*
- * For each exit handler created with a call to TkCreateExitHandler
- * there is a structure of the following type:
- */
- typedef struct ExitHandler {
- Tcl_ExitProc *proc; /* Procedure to call when process exits. */
- ClientData clientData; /* One word of information to pass to proc. */
- struct ExitHandler *nextPtr;/* Next in list of all exit handlers for
- * this application, or NULL for end of list. */
- } ExitHandler;
- /*
- * There is both per-process and per-thread exit handlers.
- * The first list is controlled by a mutex. The other is in
- * thread local storage.
- */
- static ExitHandler *firstExitPtr = NULL;
- /* First in list of all exit handlers for
- * application. */
- TCL_DECLARE_MUTEX(exitMutex)
- /*
- *---------------------------------------------------------------------------
- *
- * TkCreateExitHandler --
- *
- * Same as Tcl_CreateExitHandler, but private to Tk.
- *
- * Results:
- * None.
- *
- * Side effects.
- * Sets a handler with Tcl_CreateExitHandler if this is the first call.
- *
- *---------------------------------------------------------------------------
- */
- void
- TkCreateExitHandler (proc, clientData)
- Tcl_ExitProc *proc; /* Procedure to invoke. */
- ClientData clientData; /* Arbitrary value to pass to proc. */
- {
- ExitHandler *exitPtr;
- exitPtr = (ExitHandler *) ckalloc(sizeof(ExitHandler));
- exitPtr->proc = proc;
- exitPtr->clientData = clientData;
- Tcl_MutexLock(&exitMutex);
- if (firstExitPtr == NULL) {
- Tcl_CreateExitHandler(TkFinalize, NULL);
- }
- exitPtr->nextPtr = firstExitPtr;
- firstExitPtr = exitPtr;
- Tcl_MutexUnlock(&exitMutex);
- }
- /*
- *---------------------------------------------------------------------------
- *
- * TkDeleteExitHandler --
- *
- * Same as Tcl_DeleteExitHandler, but private to Tk.
- *
- * Results:
- * None.
- *
- * Side effects.
- * None.
- *
- *---------------------------------------------------------------------------
- */
- void
- TkDeleteExitHandler (proc, clientData)
- Tcl_ExitProc *proc; /* Procedure that was previously registered. */
- ClientData clientData; /* Arbitrary value to pass to proc. */
- {
- ExitHandler *exitPtr, *prevPtr;
- Tcl_MutexLock(&exitMutex);
- for (prevPtr = NULL, exitPtr = firstExitPtr; exitPtr != NULL;
- prevPtr = exitPtr, exitPtr = exitPtr->nextPtr) {
- if ((exitPtr->proc == proc)
- && (exitPtr->clientData == clientData)) {
- if (prevPtr == NULL) {
- firstExitPtr = exitPtr->nextPtr;
- } else {
- prevPtr->nextPtr = exitPtr->nextPtr;
- }
- ckfree((char *) exitPtr);
- break;
- }
- }
- Tcl_MutexUnlock(&exitMutex);
- return;
- }
- /*
- *---------------------------------------------------------------------------
- *
- * TkFinalize --
- *
- * Runs our private exit handlers and removes itself from Tcl. This is
- * benificial should we want to protect from dangling pointers should
- * the Tk shared library be unloaded prior to Tcl which can happen on
- * windows should the process be forcefully exiting from an exception
- * handler.
- *
- * Results:
- * None.
- *
- * Side effects.
- * None.
- *
- *---------------------------------------------------------------------------
- */
- void
- TkFinalize (clientData)
- ClientData clientData; /* Arbitrary value to pass to proc. */
- {
- ExitHandler *exitPtr;
- Tcl_DeleteExitHandler(TkFinalize, NULL);
- Tcl_MutexLock(&exitMutex);
- for (exitPtr = firstExitPtr; exitPtr != NULL; exitPtr = firstExitPtr) {
- /*
- * Be careful to remove the handler from the list before
- * invoking its callback. This protects us against
- * double-freeing if the callback should call
- * Tcl_DeleteExitHandler on itself.
- */
- firstExitPtr = exitPtr->nextPtr;
- Tcl_MutexUnlock(&exitMutex);
- (*exitPtr->proc)(exitPtr->clientData);
- ckfree((char *) exitPtr);
- Tcl_MutexLock(&exitMutex);
- }
- firstExitPtr = NULL;
- Tcl_MutexUnlock(&exitMutex);
- }