tkMacOSXCursor.c
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- /*
- * tkMacOSXCursor.c --
- *
- * This file contains Macintosh specific cursor related routines.
- *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright 2001, Apple Computer, Inc.
- * Copyright (c) 2006-2007 Daniel A. Steffen <das@users.sourceforge.net>
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkMacOSXCursor.c,v 1.4.2.6 2007/06/29 03:22:01 das Exp $
- */
- #include "tkMacOSXPrivate.h"
- /*
- * There are three different ways to set the cursor on the Mac.
- * The default theme cursors (listed in cursorNames below),
- * color resource cursors, & normal cursors.
- */
- #define NONE -1 /* Hidden cursor */
- #define THEME 0 /* Theme cursors */
- #define ANIMATED 1 /* Animated theme cursors */
- #define COLOR 2 /* Cursors of type crsr. */
- #define NORMAL 3 /* Cursors of type CURS. */
- /*
- * The following data structure contains the system specific data
- * necessary to control Windows cursors.
- */
- typedef struct {
- TkCursor info; /* Generic cursor info used by tkCursor.c */
- Handle macCursor; /* Resource containing Macintosh cursor.
- * For theme cursors, this is -1. */
- int type; /* Type of Mac cursor: for theme cursors
- * this is the theme cursor constant,
- * otherwise one of crsr or CURS */
- int count; /* For animating cursors, the count for the
- * cursor. */
- } TkMacOSXCursor;
- /*
- * The table below is used to map from the name of a predefined cursor
- * to its resource identifier.
- */
- struct CursorName {
- const char *name;
- int id;
- };
- static struct CursorName noneCursorName = {"none", 0};
- static struct CursorName themeCursorNames[] = {
- {"arrow", kThemeArrowCursor},
- {"copyarrow", kThemeCopyArrowCursor},
- {"aliasarrow", kThemeAliasArrowCursor},
- {"contextualmenuarrow", kThemeContextualMenuArrowCursor},
- {"ibeam", kThemeIBeamCursor},
- {"text", kThemeIBeamCursor},
- {"xterm", kThemeIBeamCursor},
- {"cross", kThemeCrossCursor},
- {"crosshair", kThemeCrossCursor},
- {"cross-hair", kThemeCrossCursor},
- {"plus", kThemePlusCursor},
- {"closedhand", kThemeClosedHandCursor},
- {"openhand", kThemeOpenHandCursor},
- {"pointinghand", kThemePointingHandCursor},
- {"resizeleft", kThemeResizeLeftCursor},
- {"resizeright", kThemeResizeRightCursor},
- {"resizeleftright", kThemeResizeLeftRightCursor},
- {"resizeup", kThemeResizeUpCursor},
- {"resizedown", kThemeResizeDownCursor},
- {"resizeupdown", kThemeResizeUpDownCursor},
- {"notallowed", kThemeNotAllowedCursor},
- {"poof", kThemePoofCursor},
- {NULL, 0}
- };
- static struct CursorName animatedThemeCursorNames[] = {
- {"watch", kThemeWatchCursor},
- {"countinguphand", kThemeCountingUpHandCursor},
- {"countingdownhand", kThemeCountingDownHandCursor},
- {"countingupanddownhand", kThemeCountingUpAndDownHandCursor},
- {"spinning", kThemeSpinningCursor},
- {NULL, 0}
- };
- /*
- * Declarations of static variables used in this file.
- */
- static TkMacOSXCursor * gCurrentCursor = NULL; /* A pointer to the current
- * cursor. */
- static int gResizeOverride = false; /* A boolean indicating whether
- * we should use the resize
- * cursor during installations. */
- static int gTkOwnsCursor = true; /* A boolean indicating whether
- * Tk owns the cursor. If not (for
- * instance, in the case where a Tk
- * window is embedded in another app's
- * window, and the cursor is out of
- * the tk window, we will not attempt
- * to adjust the cursor */
- /*
- * Declarations of procedures local to this file
- */
- static void FindCursorByName(TkMacOSXCursor *macCursorPtr, const char *string);
- /*
- *----------------------------------------------------------------------
- *
- * FindCursorByName --
- *
- * Retrieve a system cursor by name, and fill the macCursorPtr
- * structure. If the cursor cannot be found, the macCursor field
- * will be NULL. The function first attempts to load a color
- * cursor. If that fails it will attempt to load a black & white
- * cursor.
- *
- * Results:
- * Fills the macCursorPtr record.
- *
- * Side effects:
- * None
- *
- *----------------------------------------------------------------------
- */
- void
- FindCursorByName(
- TkMacOSXCursor *macCursorPtr,
- const char *string)
- {
- Handle resource;
- Str255 curName;
- int destWrote, inCurLen;
- Tcl_Encoding encoding;
- inCurLen = strlen(string);
- if (inCurLen > 255) {
- return;
- }
- /*
- * macRoman is the encoding that the resource fork uses.
- */
- encoding = Tcl_GetEncoding(NULL, "macRoman");
- Tcl_UtfToExternal(NULL, encoding, string, inCurLen, 0, NULL,
- (char *) &curName[1], 255, NULL, &destWrote, NULL);
- curName[0] = destWrote;
- Tcl_FreeEncoding(encoding);
- resource = GetNamedResource('crsr', curName);
- if (resource) {
- short id;
- Str255 theName;
- ResType theType;
- GetResInfo(resource, &id, &theType, theName);
- macCursorPtr->macCursor = (Handle) GetCCursor(id);
- macCursorPtr->type = COLOR;
- } else {
- macCursorPtr->macCursor = GetNamedResource('CURS', curName);
- macCursorPtr->type = NORMAL;
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkGetCursorByName --
- *
- * Retrieve a system cursor by name.
- *
- * Results:
- * Returns a new cursor, or NULL on errors.
- *
- * Side effects:
- * Allocates a new cursor.
- *
- *----------------------------------------------------------------------
- */
- TkCursor *
- TkGetCursorByName(
- Tcl_Interp *interp, /* Interpreter to use for error reporting. */
- Tk_Window tkwin, /* Window in which cursor will be used. */
- Tk_Uid string) /* Description of cursor. See manual entry
- * for details on legal syntax. */
- {
- struct CursorName *namePtr;
- TkMacOSXCursor *macCursorPtr;
- int count = -1;
- macCursorPtr = (TkMacOSXCursor *) ckalloc(sizeof(TkMacOSXCursor));
- macCursorPtr->info.cursor = (Tk_Cursor) macCursorPtr;
- /*
- * To find a cursor we must first determine if it is one of the
- * builtin cursors or the standard arrow cursor. Otherwise, we
- * attempt to load the cursor as a named Mac resource.
- */
- if (strcmp(noneCursorName.name, string) == 0) {
- namePtr = &noneCursorName;
- macCursorPtr->type = NONE;
- } else {
- for (namePtr = themeCursorNames; namePtr->name != NULL; namePtr++) {
- if (strcmp(namePtr->name, string) == 0) {
- macCursorPtr->type = THEME;
- break;
- }
- }
- }
- if (namePtr->name == NULL) {
- for (namePtr = animatedThemeCursorNames;
- namePtr->name != NULL; namePtr++) {
- int namelen = strlen (namePtr->name);
- if (strncmp(namePtr->name, string, namelen) == 0) {
- const char *numPtr = string + namelen;
- if (*numPtr) {
- int result = Tcl_GetInt(NULL, numPtr, &count);
- if (result != TCL_OK) {
- continue;
- }
- }
- macCursorPtr->type = ANIMATED;
- break;
- }
- }
- }
- if (namePtr->name != NULL) {
- macCursorPtr->macCursor = (Handle) namePtr;
- macCursorPtr->count = count;
- } else {
- FindCursorByName(macCursorPtr, string);
- if (macCursorPtr->macCursor == NULL) {
- const char **argv;
- int argc;
- /*
- * The user may be trying to specify an XCursor with fore
- * & back colors. We don't want this to be an error, so pick
- * off the first word, and try again.
- */
- if (Tcl_SplitList(interp, string, &argc, &argv) == TCL_OK ) {
- if (argc > 1) {
- FindCursorByName(macCursorPtr, argv[0]);
- }
- ckfree((char *) argv);
- }
- }
- }
- if (macCursorPtr->macCursor == NULL) {
- ckfree((char *)macCursorPtr);
- Tcl_AppendResult(interp, "bad cursor spec "", string, """, NULL);
- return NULL;
- } else {
- return (TkCursor *) macCursorPtr;
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkCreateCursorFromData --
- *
- * Creates a cursor from the source and mask bits.
- *
- * Results:
- * Returns a new cursor, or NULL on errors.
- *
- * Side effects:
- * Allocates a new cursor.
- *
- *----------------------------------------------------------------------
- */
- TkCursor *
- TkCreateCursorFromData(
- Tk_Window tkwin, /* Window in which cursor will be used. */
- CONST char *source, /* Bitmap data for cursor shape. */
- CONST char *mask, /* Bitmap data for cursor mask. */
- int width, int height, /* Dimensions of cursor. */
- int xHot, int yHot, /* Location of hot-spot in cursor. */
- XColor fgColor, /* Foreground color for cursor. */
- XColor bgColor) /* Background color for cursor. */
- {
- return NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpFreeCursor --
- *
- * This procedure is called to release a cursor allocated by
- * TkGetCursorByName.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The cursor data structure is deallocated.
- *
- *----------------------------------------------------------------------
- */
- void
- TkpFreeCursor(
- TkCursor *cursorPtr)
- {
- TkMacOSXCursor *macCursorPtr = (TkMacOSXCursor *) cursorPtr;
- switch (macCursorPtr->type) {
- case COLOR:
- DisposeCCursor((CCrsrHandle) macCursorPtr->macCursor);
- break;
- case NORMAL:
- ReleaseResource(macCursorPtr->macCursor);
- break;
- }
- if (macCursorPtr == gCurrentCursor) {
- gCurrentCursor = NULL;
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkMacOSXInstallCursor --
- *
- * Installs either the current cursor as defined by TkpSetCursor
- * or a resize cursor as the cursor the Macintosh should currently
- * display.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Changes the Macintosh mouse cursor.
- *
- *----------------------------------------------------------------------
- */
- void
- TkMacOSXInstallCursor(
- int resizeOverride)
- {
- TkMacOSXCursor *macCursorPtr = gCurrentCursor;
- CCrsrHandle ccursor;
- CursHandle cursor;
- static unsigned int cursorStep = 0;
- static int cursorHidden = 0;
- int cursorNone = 0;
- gResizeOverride = resizeOverride;
- if (resizeOverride) {
- cursor = (CursHandle) GetNamedResource('CURS', "presize");
- if (cursor) {
- SetCursor(*cursor);
- } else {
- TkMacOSXDbgMsg("Resize cursor failed: %d", ResError());
- }
- } else if (macCursorPtr == NULL) {
- SetThemeCursor(kThemeArrowCursor);
- } else {
- struct CursorName *namePtr;
- switch (macCursorPtr->type) {
- case NONE:
- if (!cursorHidden) {
- cursorHidden = 1;
- HideCursor();
- }
- cursorNone = 1;
- break;
- case THEME:
- namePtr = (struct CursorName *) macCursorPtr->macCursor;
- SetThemeCursor(
- namePtr->id);
- break;
- case ANIMATED:
- namePtr = (struct CursorName *) macCursorPtr->macCursor;
- if (macCursorPtr->count == -1) {
- SetAnimatedThemeCursor(namePtr->id, cursorStep++);
- } else {
- SetAnimatedThemeCursor(namePtr->id, macCursorPtr->count);
- }
- break;
- case COLOR:
- ccursor = (CCrsrHandle) macCursorPtr->macCursor;
- SetCCursor(ccursor);
- break;
- case NORMAL:
- cursor = (CursHandle) macCursorPtr->macCursor;
- SetCursor(*cursor);
- break;
- }
- }
- if (cursorHidden && !cursorNone) {
- cursorHidden = 0;
- ShowCursor();
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpSetCursor --
- *
- * Set the current cursor and install it.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Changes the current cursor.
- *
- *----------------------------------------------------------------------
- */
- void
- TkpSetCursor(
- TkpCursor cursor)
- {
- int cursorChanged = 1;
- if (!gTkOwnsCursor) {
- return;
- }
- if (cursor == None) {
- /*
- * This is a little tricky. We can't really tell whether
- * gCurrentCursor is NULL because it was NULL last time around
- * or because we just freed the current cursor. So if the input
- * cursor is NULL, we always need to reset it, we can't trust the
- * cursorChanged logic.
- */
- gCurrentCursor = NULL;
- } else {
- if (gCurrentCursor == (TkMacOSXCursor *) cursor) {
- cursorChanged = 0;
- }
- gCurrentCursor = (TkMacOSXCursor *) cursor;
- }
- if (Tk_MacOSXIsAppInFront() && cursorChanged) {
- TkMacOSXInstallCursor(gResizeOverride);
- }
- }
- /*
- *----------------------------------------------------------------------
- *
- * Tk_MacOSXTkOwnsCursor --
- *
- * Sets whether Tk has the right to adjust the cursor.
- *
- * Results:
- * None.
- *
- * Side effects:
- * May keep Tk from changing the cursor.
- *
- *----------------------------------------------------------------------
- */
- void
- Tk_MacOSXTkOwnsCursor(
- int tkOwnsIt)
- {
- gTkOwnsCursor = tkOwnsIt;
- }