summaryrefslogtreecommitdiffstats
path: root/carbon/tkMacOSXCursor.c
diff options
context:
space:
mode:
Diffstat (limited to 'carbon/tkMacOSXCursor.c')
-rw-r--r--carbon/tkMacOSXCursor.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/carbon/tkMacOSXCursor.c b/carbon/tkMacOSXCursor.c
new file mode 100644
index 0000000..d4d0019
--- /dev/null
+++ b/carbon/tkMacOSXCursor.c
@@ -0,0 +1,489 @@
+/*
+ * 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 1.1 2009/06/26 01:42:46 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 = 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(argv);
+ }
+ }
+ }
+
+ if (macCursorPtr->macCursor == NULL) {
+ ckfree(macCursorPtr);
+ Tcl_AppendResult(interp, "bad cursor spec \"", string, "\"", NULL);
+ return NULL;
+ }
+ 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;
+}