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dashley |
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/* $Header$ */
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dashley |
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/*
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* tkCursor.c --
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*
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* This file maintains a database of read-only cursors for the Tk
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* toolkit. This allows cursors to be shared between widgets and
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* also avoids round-trips to the X server.
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*
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* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkcursor.c,v 1.1.1.1 2001/06/13 04:59:04 dtashley Exp $
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*/
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#include "tkPort.h"
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#include "tkInt.h"
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/*
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* A TkCursor structure exists for each cursor that is currently
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* active. Each structure is indexed with two hash tables defined
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* below. One of the tables is cursorIdTable, and the other is either
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* cursorNameTable or cursorDataTable, each of which are stored in the
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* TkDisplay structure for the current thread.
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*/
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typedef struct {
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char *source; /* Cursor bits. */
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char *mask; /* Mask bits. */
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int width, height; /* Dimensions of cursor (and data
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* and mask). */
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int xHot, yHot; /* Location of cursor hot-spot. */
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Tk_Uid fg, bg; /* Colors for cursor. */
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Display *display; /* Display on which cursor will be used. */
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} DataKey;
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/*
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* Forward declarations for procedures defined in this file:
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*/
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static void CursorInit _ANSI_ARGS_((TkDisplay *dispPtr));
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static void DupCursorObjProc _ANSI_ARGS_((Tcl_Obj *srcObjPtr,
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Tcl_Obj *dupObjPtr));
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static void FreeCursor _ANSI_ARGS_((TkCursor *cursorPtr));
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static void FreeCursorObjProc _ANSI_ARGS_((Tcl_Obj *objPtr));
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static TkCursor * GetCursor _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Window tkwin, char *name));
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static TkCursor * GetCursorFromObj _ANSI_ARGS_((Tk_Window tkwin,
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Tcl_Obj *objPtr));
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static void InitCursorObj _ANSI_ARGS_((Tcl_Obj *objPtr));
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/*
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* The following structure defines the implementation of the "cursor" Tcl
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* object, used for drawing. The color object remembers the hash table
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* entry associated with a color. The actual allocation and deallocation
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* of the color should be done by the configuration package when the cursor
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* option is set.
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*/
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static Tcl_ObjType cursorObjType = {
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"cursor", /* name */
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FreeCursorObjProc, /* freeIntRepProc */
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DupCursorObjProc, /* dupIntRepProc */
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NULL, /* updateStringProc */
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NULL /* setFromAnyProc */
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};
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/*
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*----------------------------------------------------------------------
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*
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* Tk_AllocCursorFromObj --
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*
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* Given a Tcl_Obj *, map the value to a corresponding
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* Tk_Cursor structure based on the tkwin given.
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*
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* Results:
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* The return value is the X identifer for the desired cursor,
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* unless objPtr couldn't be parsed correctly. In this case,
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* None is returned and an error message is left in the interp's result.
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* The caller should never modify the cursor that is returned, and
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* should eventually call Tk_FreeCursorFromObj when the cursor is no
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* longer needed.
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*
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* Side effects:
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* The cursor is added to an internal database with a reference count.
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* For each call to this procedure, there should eventually be a call
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* to Tk_FreeCursorFromObj, so that the database can be cleaned up
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* when cursors aren't needed anymore.
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*
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*----------------------------------------------------------------------
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*/
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Tk_Cursor
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Tk_AllocCursorFromObj(interp, tkwin, objPtr)
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Tcl_Interp *interp; /* Interp for error results. */
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Tk_Window tkwin; /* Window in which the cursor will be used.*/
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Tcl_Obj *objPtr; /* Object describing cursor; see manual
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* entry for description of legal
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* syntax of this obj's string rep. */
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{
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TkCursor *cursorPtr;
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if (objPtr->typePtr != &cursorObjType) {
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InitCursorObj(objPtr);
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}
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cursorPtr = (TkCursor *) objPtr->internalRep.twoPtrValue.ptr1;
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/*
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* If the object currently points to a TkCursor, see if it's the
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* one we want. If so, increment its reference count and return.
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*/
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if (cursorPtr != NULL) {
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if (cursorPtr->resourceRefCount == 0) {
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/*
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* This is a stale reference: it refers to a TkCursor that's
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* no longer in use. Clear the reference.
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*/
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FreeCursorObjProc(objPtr);
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cursorPtr = NULL;
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} else if (Tk_Display(tkwin) == cursorPtr->display) {
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cursorPtr->resourceRefCount++;
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return cursorPtr->cursor;
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}
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}
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/*
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* The object didn't point to the TkCursor that we wanted. Search
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* the list of TkCursors with the same name to see if one of the
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* other TkCursors is the right one.
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*/
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if (cursorPtr != NULL) {
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TkCursor *firstCursorPtr =
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(TkCursor *) Tcl_GetHashValue(cursorPtr->hashPtr);
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FreeCursorObjProc(objPtr);
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for (cursorPtr = firstCursorPtr; cursorPtr != NULL;
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cursorPtr = cursorPtr->nextPtr) {
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if (Tk_Display(tkwin) == cursorPtr->display) {
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cursorPtr->resourceRefCount++;
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cursorPtr->objRefCount++;
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objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr;
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return cursorPtr->cursor;
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}
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}
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}
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/*
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* Still no luck. Call GetCursor to allocate a new TkCursor object.
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*/
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cursorPtr = GetCursor(interp, tkwin, Tcl_GetString(objPtr));
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objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr;
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if (cursorPtr == NULL) {
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return None;
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} else {
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cursorPtr->objRefCount++;
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return cursorPtr->cursor;
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}
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tk_GetCursor --
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*
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* Given a string describing a cursor, locate (or create if necessary)
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* a cursor that fits the description.
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*
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* Results:
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* The return value is the X identifer for the desired cursor,
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* unless string couldn't be parsed correctly. In this case,
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* None is returned and an error message is left in the interp's result.
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* The caller should never modify the cursor that is returned, and
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* should eventually call Tk_FreeCursor when the cursor is no longer
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* needed.
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*
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* Side effects:
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* The cursor is added to an internal database with a reference count.
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* For each call to this procedure, there should eventually be a call
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* to Tk_FreeCursor, so that the database can be cleaned up when cursors
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* aren't needed anymore.
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*
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*----------------------------------------------------------------------
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*/
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Tk_Cursor
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Tk_GetCursor(interp, tkwin, string)
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
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Tk_Window tkwin; /* Window in which cursor will be used. */
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char *string; /* Description of cursor. See manual entry
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* for details on legal syntax. */
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{
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TkCursor *cursorPtr = GetCursor(interp, tkwin, string);
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if (cursorPtr == NULL) {
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return None;
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}
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return cursorPtr->cursor;
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}
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/*
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*----------------------------------------------------------------------
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*
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* GetCursor --
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*
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* Given a string describing a cursor, locate (or create if necessary)
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* a cursor that fits the description. This routine returns the
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* internal data structure for the cursor, which avoids extra
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* hash table lookups in Tk_AllocCursorFromObj.
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*
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* Results:
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* The return value is a pointer to the TkCursor for the desired
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* cursor, unless string couldn't be parsed correctly. In this
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* case, NULL is returned and an error message is left in the
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* interp's result. The caller should never modify the cursor that
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* is returned, and should eventually call Tk_FreeCursor when the
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* cursor is no longer needed.
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*
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* Side effects:
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* The cursor is added to an internal database with a reference count.
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* For each call to this procedure, there should eventually be a call
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* to Tk_FreeCursor, so that the database can be cleaned up when cursors
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* aren't needed anymore.
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*
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*----------------------------------------------------------------------
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*/
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static TkCursor *
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GetCursor(interp, tkwin, string)
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
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Tk_Window tkwin; /* Window in which cursor will be used. */
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char *string; /* Description of cursor. See manual entry
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* for details on legal syntax. */
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{
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Tcl_HashEntry *nameHashPtr;
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register TkCursor *cursorPtr;
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TkCursor *existingCursorPtr = NULL;
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int new;
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TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
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if (!dispPtr->cursorInit) {
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CursorInit(dispPtr);
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}
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nameHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorNameTable,
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string, &new);
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if (!new) {
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existingCursorPtr = (TkCursor *) Tcl_GetHashValue(nameHashPtr);
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for (cursorPtr = existingCursorPtr; cursorPtr != NULL;
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cursorPtr = cursorPtr->nextPtr) {
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if (Tk_Display(tkwin) == cursorPtr->display) {
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cursorPtr->resourceRefCount++;
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return cursorPtr;
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}
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}
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259 |
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} else {
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260 |
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existingCursorPtr = NULL;
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}
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262 |
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cursorPtr = TkGetCursorByName(interp, tkwin, string);
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if (cursorPtr == NULL) {
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if (new) {
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Tcl_DeleteHashEntry(nameHashPtr);
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}
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269 |
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return NULL;
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270 |
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}
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271 |
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272 |
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/*
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273 |
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* Add information about this cursor to our database.
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274 |
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*/
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275 |
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cursorPtr->display = Tk_Display(tkwin);
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cursorPtr->resourceRefCount = 1;
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cursorPtr->objRefCount = 0;
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279 |
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cursorPtr->otherTable = &dispPtr->cursorNameTable;
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280 |
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cursorPtr->hashPtr = nameHashPtr;
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281 |
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cursorPtr->idHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorIdTable,
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(char *) cursorPtr->cursor, &new);
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283 |
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if (!new) {
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284 |
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panic("cursor already registered in Tk_GetCursor");
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285 |
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}
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286 |
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cursorPtr->nextPtr = existingCursorPtr;
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287 |
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Tcl_SetHashValue(nameHashPtr, cursorPtr);
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288 |
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Tcl_SetHashValue(cursorPtr->idHashPtr, cursorPtr);
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289 |
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290 |
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return cursorPtr;
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291 |
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}
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292 |
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293 |
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/*
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294 |
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*----------------------------------------------------------------------
|
295 |
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*
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296 |
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* Tk_GetCursorFromData --
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297 |
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*
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298 |
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* Given a description of the bits and colors for a cursor,
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299 |
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* make a cursor that has the given properties.
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300 |
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*
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301 |
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* Results:
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302 |
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* The return value is the X identifer for the desired cursor,
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303 |
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* unless it couldn't be created properly. In this case, None is
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304 |
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* returned and an error message is left in the interp's result. The
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305 |
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* caller should never modify the cursor that is returned, and
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306 |
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* should eventually call Tk_FreeCursor when the cursor is no
|
307 |
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* longer needed.
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308 |
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*
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309 |
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* Side effects:
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310 |
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* The cursor is added to an internal database with a reference count.
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311 |
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* For each call to this procedure, there should eventually be a call
|
312 |
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* to Tk_FreeCursor, so that the database can be cleaned up when cursors
|
313 |
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* aren't needed anymore.
|
314 |
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*
|
315 |
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*----------------------------------------------------------------------
|
316 |
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*/
|
317 |
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318 |
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Tk_Cursor
|
319 |
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Tk_GetCursorFromData(interp, tkwin, source, mask, width, height,
|
320 |
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xHot, yHot, fg, bg)
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321 |
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
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322 |
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Tk_Window tkwin; /* Window in which cursor will be used. */
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323 |
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char *source; /* Bitmap data for cursor shape. */
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324 |
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char *mask; /* Bitmap data for cursor mask. */
|
325 |
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int width, height; /* Dimensions of cursor. */
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326 |
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int xHot, yHot; /* Location of hot-spot in cursor. */
|
327 |
|
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Tk_Uid fg; /* Foreground color for cursor. */
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328 |
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Tk_Uid bg; /* Background color for cursor. */
|
329 |
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{
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330 |
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DataKey dataKey;
|
331 |
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Tcl_HashEntry *dataHashPtr;
|
332 |
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register TkCursor *cursorPtr;
|
333 |
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int new;
|
334 |
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XColor fgColor, bgColor;
|
335 |
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TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
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336 |
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337 |
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|
338 |
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if (!dispPtr->cursorInit) {
|
339 |
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CursorInit(dispPtr);
|
340 |
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}
|
341 |
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342 |
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dataKey.source = source;
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343 |
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dataKey.mask = mask;
|
344 |
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dataKey.width = width;
|
345 |
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dataKey.height = height;
|
346 |
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dataKey.xHot = xHot;
|
347 |
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dataKey.yHot = yHot;
|
348 |
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dataKey.fg = fg;
|
349 |
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dataKey.bg = bg;
|
350 |
|
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dataKey.display = Tk_Display(tkwin);
|
351 |
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dataHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorDataTable,
|
352 |
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(char *) &dataKey, &new);
|
353 |
|
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if (!new) {
|
354 |
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cursorPtr = (TkCursor *) Tcl_GetHashValue(dataHashPtr);
|
355 |
|
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cursorPtr->resourceRefCount++;
|
356 |
|
|
return cursorPtr->cursor;
|
357 |
|
|
}
|
358 |
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|
359 |
|
|
/*
|
360 |
|
|
* No suitable cursor exists yet. Make one using the data
|
361 |
|
|
* available and add it to the database.
|
362 |
|
|
*/
|
363 |
|
|
|
364 |
|
|
if (XParseColor(dataKey.display, Tk_Colormap(tkwin), fg, &fgColor) == 0) {
|
365 |
|
|
Tcl_AppendResult(interp, "invalid color name \"", fg, "\"",
|
366 |
|
|
(char *) NULL);
|
367 |
|
|
goto error;
|
368 |
|
|
}
|
369 |
|
|
if (XParseColor(dataKey.display, Tk_Colormap(tkwin), bg, &bgColor) == 0) {
|
370 |
|
|
Tcl_AppendResult(interp, "invalid color name \"", bg, "\"",
|
371 |
|
|
(char *) NULL);
|
372 |
|
|
goto error;
|
373 |
|
|
}
|
374 |
|
|
|
375 |
|
|
cursorPtr = TkCreateCursorFromData(tkwin, source, mask, width, height,
|
376 |
|
|
xHot, yHot, fgColor, bgColor);
|
377 |
|
|
|
378 |
|
|
if (cursorPtr == NULL) {
|
379 |
|
|
goto error;
|
380 |
|
|
}
|
381 |
|
|
|
382 |
|
|
cursorPtr->resourceRefCount = 1;
|
383 |
|
|
cursorPtr->otherTable = &dispPtr->cursorDataTable;
|
384 |
|
|
cursorPtr->hashPtr = dataHashPtr;
|
385 |
|
|
cursorPtr->objRefCount = 0;
|
386 |
|
|
cursorPtr->idHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorIdTable,
|
387 |
|
|
(char *) cursorPtr->cursor, &new);
|
388 |
|
|
|
389 |
|
|
if (!new) {
|
390 |
|
|
panic("cursor already registered in Tk_GetCursorFromData");
|
391 |
|
|
}
|
392 |
|
|
Tcl_SetHashValue(dataHashPtr, cursorPtr);
|
393 |
|
|
Tcl_SetHashValue(cursorPtr->idHashPtr, cursorPtr);
|
394 |
|
|
return cursorPtr->cursor;
|
395 |
|
|
|
396 |
|
|
error:
|
397 |
|
|
Tcl_DeleteHashEntry(dataHashPtr);
|
398 |
|
|
return None;
|
399 |
|
|
}
|
400 |
|
|
|
401 |
|
|
/*
|
402 |
|
|
*--------------------------------------------------------------
|
403 |
|
|
*
|
404 |
|
|
* Tk_NameOfCursor --
|
405 |
|
|
*
|
406 |
|
|
* Given a cursor, return a textual string identifying it.
|
407 |
|
|
*
|
408 |
|
|
* Results:
|
409 |
|
|
* If cursor was created by Tk_GetCursor, then the return
|
410 |
|
|
* value is the "string" that was used to create it.
|
411 |
|
|
* Otherwise the return value is a string giving the X
|
412 |
|
|
* identifier for the cursor. The storage for the returned
|
413 |
|
|
* string is only guaranteed to persist up until the next
|
414 |
|
|
* call to this procedure.
|
415 |
|
|
*
|
416 |
|
|
* Side effects:
|
417 |
|
|
* None.
|
418 |
|
|
*
|
419 |
|
|
*--------------------------------------------------------------
|
420 |
|
|
*/
|
421 |
|
|
|
422 |
|
|
char *
|
423 |
|
|
Tk_NameOfCursor(display, cursor)
|
424 |
|
|
Display *display; /* Display for which cursor was allocated. */
|
425 |
|
|
Tk_Cursor cursor; /* Identifier for cursor whose name is
|
426 |
|
|
* wanted. */
|
427 |
|
|
{
|
428 |
|
|
Tcl_HashEntry *idHashPtr;
|
429 |
|
|
TkCursor *cursorPtr;
|
430 |
|
|
TkDisplay *dispPtr;
|
431 |
|
|
|
432 |
|
|
dispPtr = TkGetDisplay(display);
|
433 |
|
|
|
434 |
|
|
if (!dispPtr->cursorInit) {
|
435 |
|
|
printid:
|
436 |
|
|
sprintf(dispPtr->cursorString, "cursor id 0x%x",
|
437 |
|
|
(unsigned int) cursor);
|
438 |
|
|
return dispPtr->cursorString;
|
439 |
|
|
}
|
440 |
|
|
idHashPtr = Tcl_FindHashEntry(&dispPtr->cursorIdTable, (char *) cursor);
|
441 |
|
|
if (idHashPtr == NULL) {
|
442 |
|
|
goto printid;
|
443 |
|
|
}
|
444 |
|
|
cursorPtr = (TkCursor *) Tcl_GetHashValue(idHashPtr);
|
445 |
|
|
if (cursorPtr->otherTable != &dispPtr->cursorNameTable) {
|
446 |
|
|
goto printid;
|
447 |
|
|
}
|
448 |
|
|
return cursorPtr->hashPtr->key.string;
|
449 |
|
|
}
|
450 |
|
|
|
451 |
|
|
/*
|
452 |
|
|
*----------------------------------------------------------------------
|
453 |
|
|
*
|
454 |
|
|
* FreeCursor --
|
455 |
|
|
*
|
456 |
|
|
* This procedure is invoked by both Tk_FreeCursor and
|
457 |
|
|
* Tk_FreeCursorFromObj; it does all the real work of deallocating
|
458 |
|
|
* a cursor.
|
459 |
|
|
*
|
460 |
|
|
* Results:
|
461 |
|
|
* None.
|
462 |
|
|
*
|
463 |
|
|
* Side effects:
|
464 |
|
|
* The reference count associated with cursor is decremented, and
|
465 |
|
|
* it is officially deallocated if no-one is using it anymore.
|
466 |
|
|
*
|
467 |
|
|
*----------------------------------------------------------------------
|
468 |
|
|
*/
|
469 |
|
|
|
470 |
|
|
static void
|
471 |
|
|
FreeCursor(cursorPtr)
|
472 |
|
|
TkCursor *cursorPtr; /* Cursor to be released. */
|
473 |
|
|
{
|
474 |
|
|
TkCursor *prevPtr;
|
475 |
|
|
|
476 |
|
|
cursorPtr->resourceRefCount--;
|
477 |
|
|
if (cursorPtr->resourceRefCount > 0) {
|
478 |
|
|
return;
|
479 |
|
|
}
|
480 |
|
|
|
481 |
|
|
Tcl_DeleteHashEntry(cursorPtr->idHashPtr);
|
482 |
|
|
prevPtr = (TkCursor *) Tcl_GetHashValue(cursorPtr->hashPtr);
|
483 |
|
|
if (prevPtr == cursorPtr) {
|
484 |
|
|
if (cursorPtr->nextPtr == NULL) {
|
485 |
|
|
Tcl_DeleteHashEntry(cursorPtr->hashPtr);
|
486 |
|
|
} else {
|
487 |
|
|
Tcl_SetHashValue(cursorPtr->hashPtr, cursorPtr->nextPtr);
|
488 |
|
|
}
|
489 |
|
|
} else {
|
490 |
|
|
while (prevPtr->nextPtr != cursorPtr) {
|
491 |
|
|
prevPtr = prevPtr->nextPtr;
|
492 |
|
|
}
|
493 |
|
|
prevPtr->nextPtr = cursorPtr->nextPtr;
|
494 |
|
|
}
|
495 |
|
|
TkpFreeCursor(cursorPtr);
|
496 |
|
|
if (cursorPtr->objRefCount == 0) {
|
497 |
|
|
ckfree((char *) cursorPtr);
|
498 |
|
|
}
|
499 |
|
|
}
|
500 |
|
|
|
501 |
|
|
/*
|
502 |
|
|
*----------------------------------------------------------------------
|
503 |
|
|
*
|
504 |
|
|
* Tk_FreeCursor --
|
505 |
|
|
*
|
506 |
|
|
* This procedure is called to release a cursor allocated by
|
507 |
|
|
* Tk_GetCursor or TkGetCursorFromData.
|
508 |
|
|
*
|
509 |
|
|
* Results:
|
510 |
|
|
* None.
|
511 |
|
|
*
|
512 |
|
|
* Side effects:
|
513 |
|
|
* The reference count associated with cursor is decremented, and
|
514 |
|
|
* it is officially deallocated if no-one is using it anymore.
|
515 |
|
|
*
|
516 |
|
|
*----------------------------------------------------------------------
|
517 |
|
|
*/
|
518 |
|
|
|
519 |
|
|
void
|
520 |
|
|
Tk_FreeCursor(display, cursor)
|
521 |
|
|
Display *display; /* Display for which cursor was allocated. */
|
522 |
|
|
Tk_Cursor cursor; /* Identifier for cursor to be released. */
|
523 |
|
|
{
|
524 |
|
|
Tcl_HashEntry *idHashPtr;
|
525 |
|
|
TkDisplay *dispPtr = TkGetDisplay(display);
|
526 |
|
|
|
527 |
|
|
if (!dispPtr->cursorInit) {
|
528 |
|
|
panic("Tk_FreeCursor called before Tk_GetCursor");
|
529 |
|
|
}
|
530 |
|
|
|
531 |
|
|
idHashPtr = Tcl_FindHashEntry(&dispPtr->cursorIdTable, (char *) cursor);
|
532 |
|
|
if (idHashPtr == NULL) {
|
533 |
|
|
panic("Tk_FreeCursor received unknown cursor argument");
|
534 |
|
|
}
|
535 |
|
|
FreeCursor((TkCursor *) Tcl_GetHashValue(idHashPtr));
|
536 |
|
|
}
|
537 |
|
|
|
538 |
|
|
/*
|
539 |
|
|
*----------------------------------------------------------------------
|
540 |
|
|
*
|
541 |
|
|
* Tk_FreeCursorFromObj --
|
542 |
|
|
*
|
543 |
|
|
* This procedure is called to release a cursor allocated by
|
544 |
|
|
* Tk_AllocCursorFromObj. It does not throw away the Tcl_Obj *;
|
545 |
|
|
* it only gets rid of the hash table entry for this cursor
|
546 |
|
|
* and clears the cached value that is normally stored in the object.
|
547 |
|
|
*
|
548 |
|
|
* Results:
|
549 |
|
|
* None.
|
550 |
|
|
*
|
551 |
|
|
* Side effects:
|
552 |
|
|
* The reference count associated with the cursor represented by
|
553 |
|
|
* objPtr is decremented, and the cursor is released to X if there are
|
554 |
|
|
* no remaining uses for it.
|
555 |
|
|
*
|
556 |
|
|
*----------------------------------------------------------------------
|
557 |
|
|
*/
|
558 |
|
|
|
559 |
|
|
void
|
560 |
|
|
Tk_FreeCursorFromObj(tkwin, objPtr)
|
561 |
|
|
Tk_Window tkwin; /* The window this cursor lives in. Needed
|
562 |
|
|
* for the display value. */
|
563 |
|
|
Tcl_Obj *objPtr; /* The Tcl_Obj * to be freed. */
|
564 |
|
|
{
|
565 |
|
|
FreeCursor(GetCursorFromObj(tkwin, objPtr));
|
566 |
|
|
}
|
567 |
|
|
|
568 |
|
|
/*
|
569 |
|
|
*---------------------------------------------------------------------------
|
570 |
|
|
*
|
571 |
|
|
* FreeCursorFromObjProc --
|
572 |
|
|
*
|
573 |
|
|
* This proc is called to release an object reference to a cursor.
|
574 |
|
|
* Called when the object's internal rep is released or when
|
575 |
|
|
* the cached tkColPtr needs to be changed.
|
576 |
|
|
*
|
577 |
|
|
* Results:
|
578 |
|
|
* None.
|
579 |
|
|
*
|
580 |
|
|
* Side effects:
|
581 |
|
|
* The object reference count is decremented. When both it
|
582 |
|
|
* and the hash ref count go to zero, the color's resources
|
583 |
|
|
* are released.
|
584 |
|
|
*
|
585 |
|
|
*---------------------------------------------------------------------------
|
586 |
|
|
*/
|
587 |
|
|
|
588 |
|
|
static void
|
589 |
|
|
FreeCursorObjProc(objPtr)
|
590 |
|
|
Tcl_Obj *objPtr; /* The object we are releasing. */
|
591 |
|
|
{
|
592 |
|
|
TkCursor *cursorPtr = (TkCursor *) objPtr->internalRep.twoPtrValue.ptr1;
|
593 |
|
|
|
594 |
|
|
if (cursorPtr != NULL) {
|
595 |
|
|
cursorPtr->objRefCount--;
|
596 |
|
|
if ((cursorPtr->objRefCount == 0)
|
597 |
|
|
&& (cursorPtr->resourceRefCount == 0)) {
|
598 |
|
|
ckfree((char *) cursorPtr);
|
599 |
|
|
}
|
600 |
|
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) NULL;
|
601 |
|
|
}
|
602 |
|
|
}
|
603 |
|
|
|
604 |
|
|
/*
|
605 |
|
|
*---------------------------------------------------------------------------
|
606 |
|
|
*
|
607 |
|
|
* DupCursorObjProc --
|
608 |
|
|
*
|
609 |
|
|
* When a cached cursor object is duplicated, this is called to
|
610 |
|
|
* update the internal reps.
|
611 |
|
|
*
|
612 |
|
|
* Results:
|
613 |
|
|
* None.
|
614 |
|
|
*
|
615 |
|
|
* Side effects:
|
616 |
|
|
* The color's objRefCount is incremented and the internal rep
|
617 |
|
|
* of the copy is set to point to it.
|
618 |
|
|
*
|
619 |
|
|
*---------------------------------------------------------------------------
|
620 |
|
|
*/
|
621 |
|
|
|
622 |
|
|
static void
|
623 |
|
|
DupCursorObjProc(srcObjPtr, dupObjPtr)
|
624 |
|
|
Tcl_Obj *srcObjPtr; /* The object we are copying from. */
|
625 |
|
|
Tcl_Obj *dupObjPtr; /* The object we are copying to. */
|
626 |
|
|
{
|
627 |
|
|
TkCursor *cursorPtr = (TkCursor *) srcObjPtr->internalRep.twoPtrValue.ptr1;
|
628 |
|
|
|
629 |
|
|
dupObjPtr->typePtr = srcObjPtr->typePtr;
|
630 |
|
|
dupObjPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr;
|
631 |
|
|
|
632 |
|
|
if (cursorPtr != NULL) {
|
633 |
|
|
cursorPtr->objRefCount++;
|
634 |
|
|
}
|
635 |
|
|
}
|
636 |
|
|
|
637 |
|
|
/*
|
638 |
|
|
*----------------------------------------------------------------------
|
639 |
|
|
*
|
640 |
|
|
* Tk_GetCursorFromObj --
|
641 |
|
|
*
|
642 |
|
|
* Returns the cursor referred to buy a Tcl object. The cursor must
|
643 |
|
|
* already have been allocated via a call to Tk_AllocCursorFromObj or
|
644 |
|
|
* Tk_GetCursor.
|
645 |
|
|
*
|
646 |
|
|
* Results:
|
647 |
|
|
* Returns the Tk_Cursor that matches the tkwin and the string rep
|
648 |
|
|
* of the name of the cursor given in objPtr.
|
649 |
|
|
*
|
650 |
|
|
* Side effects:
|
651 |
|
|
* If the object is not already a cursor, the conversion will free
|
652 |
|
|
* any old internal representation.
|
653 |
|
|
*
|
654 |
|
|
*----------------------------------------------------------------------
|
655 |
|
|
*/
|
656 |
|
|
|
657 |
|
|
Tk_Cursor
|
658 |
|
|
Tk_GetCursorFromObj(tkwin, objPtr)
|
659 |
|
|
Tk_Window tkwin;
|
660 |
|
|
Tcl_Obj *objPtr; /* The object from which to get pixels. */
|
661 |
|
|
{
|
662 |
|
|
TkCursor *cursorPtr = GetCursorFromObj(tkwin, objPtr);
|
663 |
|
|
/* GetCursorFromObj should never return NULL */
|
664 |
|
|
return cursorPtr->cursor;
|
665 |
|
|
}
|
666 |
|
|
|
667 |
|
|
/*
|
668 |
|
|
*----------------------------------------------------------------------
|
669 |
|
|
*
|
670 |
|
|
* GetCursorFromObj --
|
671 |
|
|
*
|
672 |
|
|
* Returns the cursor referred to by a Tcl object. The cursor must
|
673 |
|
|
* already have been allocated via a call to Tk_AllocCursorFromObj
|
674 |
|
|
* or Tk_GetCursor.
|
675 |
|
|
*
|
676 |
|
|
* Results:
|
677 |
|
|
* Returns the TkCursor * that matches the tkwin and the string rep
|
678 |
|
|
* of the name of the cursor given in objPtr.
|
679 |
|
|
*
|
680 |
|
|
* Side effects:
|
681 |
|
|
* If the object is not already a cursor, the conversion will free
|
682 |
|
|
* any old internal representation.
|
683 |
|
|
*
|
684 |
|
|
*----------------------------------------------------------------------
|
685 |
|
|
*/
|
686 |
|
|
|
687 |
|
|
static TkCursor *
|
688 |
|
|
GetCursorFromObj(tkwin, objPtr)
|
689 |
|
|
Tk_Window tkwin; /* Window in which the cursor will be used. */
|
690 |
|
|
Tcl_Obj *objPtr; /* The object that describes the desired
|
691 |
|
|
* cursor. */
|
692 |
|
|
{
|
693 |
|
|
TkCursor *cursorPtr;
|
694 |
|
|
Tcl_HashEntry *hashPtr;
|
695 |
|
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
|
696 |
|
|
|
697 |
|
|
if (objPtr->typePtr != &cursorObjType) {
|
698 |
|
|
InitCursorObj(objPtr);
|
699 |
|
|
}
|
700 |
|
|
|
701 |
|
|
cursorPtr = (TkCursor *) objPtr->internalRep.twoPtrValue.ptr1;
|
702 |
|
|
if (cursorPtr != NULL) {
|
703 |
|
|
if (Tk_Display(tkwin) == cursorPtr->display) {
|
704 |
|
|
return cursorPtr;
|
705 |
|
|
}
|
706 |
|
|
hashPtr = cursorPtr->hashPtr;
|
707 |
|
|
} else {
|
708 |
|
|
hashPtr = Tcl_FindHashEntry(&dispPtr->cursorNameTable,
|
709 |
|
|
Tcl_GetString(objPtr));
|
710 |
|
|
if (hashPtr == NULL) {
|
711 |
|
|
goto error;
|
712 |
|
|
}
|
713 |
|
|
}
|
714 |
|
|
|
715 |
|
|
/*
|
716 |
|
|
* At this point we've got a hash table entry, off of which hang
|
717 |
|
|
* one or more TkCursor structures. See if any of them will work.
|
718 |
|
|
*/
|
719 |
|
|
|
720 |
|
|
for (cursorPtr = (TkCursor *) Tcl_GetHashValue(hashPtr);
|
721 |
|
|
cursorPtr != NULL; cursorPtr = cursorPtr->nextPtr) {
|
722 |
|
|
if (Tk_Display(tkwin) == cursorPtr->display) {
|
723 |
|
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr;
|
724 |
|
|
cursorPtr->objRefCount++;
|
725 |
|
|
return cursorPtr;
|
726 |
|
|
}
|
727 |
|
|
}
|
728 |
|
|
|
729 |
|
|
error:
|
730 |
|
|
panic("GetCursorFromObj called with non-existent cursor!");
|
731 |
|
|
/*
|
732 |
|
|
* The following code isn't reached; it's just there to please compilers.
|
733 |
|
|
*/
|
734 |
|
|
return NULL;
|
735 |
|
|
}
|
736 |
|
|
|
737 |
|
|
/*
|
738 |
|
|
*----------------------------------------------------------------------
|
739 |
|
|
*
|
740 |
|
|
* InitCursorObj --
|
741 |
|
|
*
|
742 |
|
|
* Bookeeping procedure to change an objPtr to a cursor type.
|
743 |
|
|
*
|
744 |
|
|
* Results:
|
745 |
|
|
* None.
|
746 |
|
|
*
|
747 |
|
|
* Side effects:
|
748 |
|
|
* The old internal rep of the object is freed. The internal
|
749 |
|
|
* rep is cleared. The final form of the object is set
|
750 |
|
|
* by either Tk_AllocCursorFromObj or GetCursorFromObj.
|
751 |
|
|
*
|
752 |
|
|
*----------------------------------------------------------------------
|
753 |
|
|
*/
|
754 |
|
|
|
755 |
|
|
static void
|
756 |
|
|
InitCursorObj(objPtr)
|
757 |
|
|
Tcl_Obj *objPtr; /* The object to convert. */
|
758 |
|
|
{
|
759 |
|
|
Tcl_ObjType *typePtr;
|
760 |
|
|
|
761 |
|
|
/*
|
762 |
|
|
* Free the old internalRep before setting the new one.
|
763 |
|
|
*/
|
764 |
|
|
|
765 |
|
|
Tcl_GetString(objPtr);
|
766 |
|
|
typePtr = objPtr->typePtr;
|
767 |
|
|
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
|
768 |
|
|
(*typePtr->freeIntRepProc)(objPtr);
|
769 |
|
|
}
|
770 |
|
|
objPtr->typePtr = &cursorObjType;
|
771 |
|
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) NULL;
|
772 |
|
|
}
|
773 |
|
|
|
774 |
|
|
/*
|
775 |
|
|
*----------------------------------------------------------------------
|
776 |
|
|
*
|
777 |
|
|
* CursorInit --
|
778 |
|
|
*
|
779 |
|
|
* Initialize the structures used for cursor management.
|
780 |
|
|
*
|
781 |
|
|
* Results:
|
782 |
|
|
* None.
|
783 |
|
|
*
|
784 |
|
|
* Side effects:
|
785 |
|
|
* Read the code.
|
786 |
|
|
*
|
787 |
|
|
*----------------------------------------------------------------------
|
788 |
|
|
*/
|
789 |
|
|
|
790 |
|
|
static void
|
791 |
|
|
CursorInit(dispPtr)
|
792 |
|
|
TkDisplay *dispPtr; /* Display used to store thread-specific data. */
|
793 |
|
|
{
|
794 |
|
|
Tcl_InitHashTable(&dispPtr->cursorNameTable, TCL_STRING_KEYS);
|
795 |
|
|
Tcl_InitHashTable(&dispPtr->cursorDataTable, sizeof(DataKey)/sizeof(int));
|
796 |
|
|
|
797 |
|
|
/*
|
798 |
|
|
* The call below is tricky: can't use sizeof(IdKey) because it
|
799 |
|
|
* gets padded with extra unpredictable bytes on some 64-bit
|
800 |
|
|
* machines.
|
801 |
|
|
*/
|
802 |
|
|
|
803 |
|
|
/*
|
804 |
|
|
* Old code....
|
805 |
|
|
* Tcl_InitHashTable(&dispPtr->cursorIdTable, sizeof(Display *)
|
806 |
|
|
* /sizeof(int));
|
807 |
|
|
*
|
808 |
|
|
* The comment above doesn't make sense.
|
809 |
|
|
* However, XIDs should only be 32 bits, by the definition of X,
|
810 |
|
|
* so the code above causes Tk to crash. Here is the real code:
|
811 |
|
|
*/
|
812 |
|
|
|
813 |
|
|
Tcl_InitHashTable(&dispPtr->cursorIdTable, TCL_ONE_WORD_KEYS);
|
814 |
|
|
|
815 |
|
|
dispPtr->cursorInit = 1;
|
816 |
|
|
}
|
817 |
|
|
|
818 |
|
|
/*
|
819 |
|
|
*----------------------------------------------------------------------
|
820 |
|
|
*
|
821 |
|
|
* TkDebugCursor --
|
822 |
|
|
*
|
823 |
|
|
* This procedure returns debugging information about a cursor.
|
824 |
|
|
*
|
825 |
|
|
* Results:
|
826 |
|
|
* The return value is a list with one sublist for each TkCursor
|
827 |
|
|
* corresponding to "name". Each sublist has two elements that
|
828 |
|
|
* contain the resourceRefCount and objRefCount fields from the
|
829 |
|
|
* TkCursor structure.
|
830 |
|
|
*
|
831 |
|
|
* Side effects:
|
832 |
|
|
* None.
|
833 |
|
|
*
|
834 |
|
|
*----------------------------------------------------------------------
|
835 |
|
|
*/
|
836 |
|
|
|
837 |
|
|
Tcl_Obj *
|
838 |
|
|
TkDebugCursor(tkwin, name)
|
839 |
|
|
Tk_Window tkwin; /* The window in which the cursor will be
|
840 |
|
|
* used (not currently used). */
|
841 |
|
|
char *name; /* Name of the desired color. */
|
842 |
|
|
{
|
843 |
|
|
TkCursor *cursorPtr;
|
844 |
|
|
Tcl_HashEntry *hashPtr;
|
845 |
|
|
Tcl_Obj *resultPtr, *objPtr;
|
846 |
|
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
|
847 |
|
|
|
848 |
|
|
resultPtr = Tcl_NewObj();
|
849 |
|
|
hashPtr = Tcl_FindHashEntry(&dispPtr->cursorNameTable, name);
|
850 |
|
|
if (hashPtr != NULL) {
|
851 |
|
|
cursorPtr = (TkCursor *) Tcl_GetHashValue(hashPtr);
|
852 |
|
|
if (cursorPtr == NULL) {
|
853 |
|
|
panic("TkDebugCursor found empty hash table entry");
|
854 |
|
|
}
|
855 |
|
|
for ( ; (cursorPtr != NULL); cursorPtr = cursorPtr->nextPtr) {
|
856 |
|
|
objPtr = Tcl_NewObj();
|
857 |
|
|
Tcl_ListObjAppendElement(NULL, objPtr,
|
858 |
|
|
Tcl_NewIntObj(cursorPtr->resourceRefCount));
|
859 |
|
|
Tcl_ListObjAppendElement(NULL, objPtr,
|
860 |
|
|
Tcl_NewIntObj(cursorPtr->objRefCount));
|
861 |
|
|
Tcl_ListObjAppendElement(NULL, resultPtr, objPtr);
|
862 |
|
|
}
|
863 |
|
|
}
|
864 |
|
|
return resultPtr;
|
865 |
|
|
}
|
866 |
|
|
|
867 |
dashley |
69 |
/* End of tkcursor.c */
|