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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkcursor.c,v 1.1.1.1 2001/06/13 04:59:04 dtashley Exp $ */ |
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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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} else { |
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existingCursorPtr = NULL; |
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} |
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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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return NULL; |
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} |
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/* |
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* Add information about this cursor to our database. |
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*/ |
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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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cursorPtr->otherTable = &dispPtr->cursorNameTable; |
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cursorPtr->hashPtr = nameHashPtr; |
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cursorPtr->idHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorIdTable, |
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(char *) cursorPtr->cursor, &new); |
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if (!new) { |
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panic("cursor already registered in Tk_GetCursor"); |
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} |
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cursorPtr->nextPtr = existingCursorPtr; |
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Tcl_SetHashValue(nameHashPtr, cursorPtr); |
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Tcl_SetHashValue(cursorPtr->idHashPtr, cursorPtr); |
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return cursorPtr; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tk_GetCursorFromData -- |
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* |
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* Given a description of the bits and colors for a cursor, |
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* make a cursor that has the given properties. |
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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 it couldn't be created properly. In this case, None is |
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* returned and an error message is left in the interp's result. The |
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* caller should never modify the cursor that is returned, and |
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* should eventually call Tk_FreeCursor 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_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_GetCursorFromData(interp, tkwin, source, mask, width, height, |
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xHot, yHot, fg, bg) |
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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 *source; /* Bitmap data for cursor shape. */ |
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char *mask; /* Bitmap data for cursor mask. */ |
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int width, height; /* Dimensions of cursor. */ |
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int xHot, yHot; /* Location of hot-spot in cursor. */ |
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Tk_Uid fg; /* Foreground color for cursor. */ |
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Tk_Uid bg; /* Background color for cursor. */ |
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{ |
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DataKey dataKey; |
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Tcl_HashEntry *dataHashPtr; |
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register TkCursor *cursorPtr; |
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int new; |
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XColor fgColor, bgColor; |
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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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dataKey.source = source; |
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dataKey.mask = mask; |
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dataKey.width = width; |
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dataKey.height = height; |
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dataKey.xHot = xHot; |
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dataKey.yHot = yHot; |
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dataKey.fg = fg; |
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dataKey.bg = bg; |
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dataKey.display = Tk_Display(tkwin); |
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dataHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorDataTable, |
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(char *) &dataKey, &new); |
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if (!new) { |
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cursorPtr = (TkCursor *) Tcl_GetHashValue(dataHashPtr); |
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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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* No suitable cursor exists yet. Make one using the data |
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* available and add it to the database. |
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*/ |
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if (XParseColor(dataKey.display, Tk_Colormap(tkwin), fg, &fgColor) == 0) { |
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Tcl_AppendResult(interp, "invalid color name \"", fg, "\"", |
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(char *) NULL); |
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goto error; |
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} |
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if (XParseColor(dataKey.display, Tk_Colormap(tkwin), bg, &bgColor) == 0) { |
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Tcl_AppendResult(interp, "invalid color name \"", bg, "\"", |
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(char *) NULL); |
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goto error; |
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} |
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cursorPtr = TkCreateCursorFromData(tkwin, source, mask, width, height, |
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xHot, yHot, fgColor, bgColor); |
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if (cursorPtr == NULL) { |
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goto error; |
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} |
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cursorPtr->resourceRefCount = 1; |
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cursorPtr->otherTable = &dispPtr->cursorDataTable; |
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cursorPtr->hashPtr = dataHashPtr; |
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cursorPtr->objRefCount = 0; |
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cursorPtr->idHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorIdTable, |
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(char *) cursorPtr->cursor, &new); |
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|
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if (!new) { |
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panic("cursor already registered in Tk_GetCursorFromData"); |
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} |
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Tcl_SetHashValue(dataHashPtr, cursorPtr); |
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Tcl_SetHashValue(cursorPtr->idHashPtr, cursorPtr); |
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return cursorPtr->cursor; |
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error: |
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Tcl_DeleteHashEntry(dataHashPtr); |
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return None; |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* Tk_NameOfCursor -- |
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* |
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* Given a cursor, return a textual string identifying it. |
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* |
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* Results: |
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* If cursor was created by Tk_GetCursor, then the return |
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* value is the "string" that was used to create it. |
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* Otherwise the return value is a string giving the X |
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* identifier for the cursor. The storage for the returned |
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* string is only guaranteed to persist up until the next |
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* call to this procedure. |
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* |
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* Side effects: |
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* None. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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|
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char * |
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Tk_NameOfCursor(display, cursor) |
|
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Display *display; /* Display for which cursor was allocated. */ |
|
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Tk_Cursor cursor; /* Identifier for cursor whose name is |
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* wanted. */ |
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{ |
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Tcl_HashEntry *idHashPtr; |
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TkCursor *cursorPtr; |
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TkDisplay *dispPtr; |
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|
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dispPtr = TkGetDisplay(display); |
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if (!dispPtr->cursorInit) { |
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printid: |
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sprintf(dispPtr->cursorString, "cursor id 0x%x", |
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(unsigned int) cursor); |
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return dispPtr->cursorString; |
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} |
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idHashPtr = Tcl_FindHashEntry(&dispPtr->cursorIdTable, (char *) cursor); |
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if (idHashPtr == NULL) { |
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goto printid; |
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} |
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cursorPtr = (TkCursor *) Tcl_GetHashValue(idHashPtr); |
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if (cursorPtr->otherTable != &dispPtr->cursorNameTable) { |
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goto printid; |
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} |
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return cursorPtr->hashPtr->key.string; |
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|
} |
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|
|
|
/* |
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|
*---------------------------------------------------------------------- |
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|
* |
|
|
* FreeCursor -- |
|
|
* |
|
|
* This procedure is invoked by both Tk_FreeCursor and |
|
|
* Tk_FreeCursorFromObj; it does all the real work of deallocating |
|
|
* a cursor. |
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|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The reference count associated with cursor is decremented, and |
|
|
* it is officially deallocated if no-one is using it anymore. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FreeCursor(cursorPtr) |
|
|
TkCursor *cursorPtr; /* Cursor to be released. */ |
|
|
{ |
|
|
TkCursor *prevPtr; |
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|
|
|
cursorPtr->resourceRefCount--; |
|
|
if (cursorPtr->resourceRefCount > 0) { |
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|
return; |
|
|
} |
|
|
|
|
|
Tcl_DeleteHashEntry(cursorPtr->idHashPtr); |
|
|
prevPtr = (TkCursor *) Tcl_GetHashValue(cursorPtr->hashPtr); |
|
|
if (prevPtr == cursorPtr) { |
|
|
if (cursorPtr->nextPtr == NULL) { |
|
|
Tcl_DeleteHashEntry(cursorPtr->hashPtr); |
|
|
} else { |
|
|
Tcl_SetHashValue(cursorPtr->hashPtr, cursorPtr->nextPtr); |
|
|
} |
|
|
} else { |
|
|
while (prevPtr->nextPtr != cursorPtr) { |
|
|
prevPtr = prevPtr->nextPtr; |
|
|
} |
|
|
prevPtr->nextPtr = cursorPtr->nextPtr; |
|
|
} |
|
|
TkpFreeCursor(cursorPtr); |
|
|
if (cursorPtr->objRefCount == 0) { |
|
|
ckfree((char *) cursorPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tk_FreeCursor -- |
|
|
* |
|
|
* This procedure is called to release a cursor allocated by |
|
|
* Tk_GetCursor or TkGetCursorFromData. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The reference count associated with cursor is decremented, and |
|
|
* it is officially deallocated if no-one is using it anymore. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tk_FreeCursor(display, cursor) |
|
|
Display *display; /* Display for which cursor was allocated. */ |
|
|
Tk_Cursor cursor; /* Identifier for cursor to be released. */ |
|
|
{ |
|
|
Tcl_HashEntry *idHashPtr; |
|
|
TkDisplay *dispPtr = TkGetDisplay(display); |
|
|
|
|
|
if (!dispPtr->cursorInit) { |
|
|
panic("Tk_FreeCursor called before Tk_GetCursor"); |
|
|
} |
|
|
|
|
|
idHashPtr = Tcl_FindHashEntry(&dispPtr->cursorIdTable, (char *) cursor); |
|
|
if (idHashPtr == NULL) { |
|
|
panic("Tk_FreeCursor received unknown cursor argument"); |
|
|
} |
|
|
FreeCursor((TkCursor *) Tcl_GetHashValue(idHashPtr)); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tk_FreeCursorFromObj -- |
|
|
* |
|
|
* This procedure is called to release a cursor allocated by |
|
|
* Tk_AllocCursorFromObj. It does not throw away the Tcl_Obj *; |
|
|
* it only gets rid of the hash table entry for this cursor |
|
|
* and clears the cached value that is normally stored in the object. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The reference count associated with the cursor represented by |
|
|
* objPtr is decremented, and the cursor is released to X if there are |
|
|
* no remaining uses for it. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
Tk_FreeCursorFromObj(tkwin, objPtr) |
|
|
Tk_Window tkwin; /* The window this cursor lives in. Needed |
|
|
* for the display value. */ |
|
|
Tcl_Obj *objPtr; /* The Tcl_Obj * to be freed. */ |
|
|
{ |
|
|
FreeCursor(GetCursorFromObj(tkwin, objPtr)); |
|
|
} |
|
|
|
|
|
/* |
|
|
*--------------------------------------------------------------------------- |
|
|
* |
|
|
* FreeCursorFromObjProc -- |
|
|
* |
|
|
* This proc is called to release an object reference to a cursor. |
|
|
* Called when the object's internal rep is released or when |
|
|
* the cached tkColPtr needs to be changed. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The object reference count is decremented. When both it |
|
|
* and the hash ref count go to zero, the color's resources |
|
|
* are released. |
|
|
* |
|
|
*--------------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FreeCursorObjProc(objPtr) |
|
|
Tcl_Obj *objPtr; /* The object we are releasing. */ |
|
|
{ |
|
|
TkCursor *cursorPtr = (TkCursor *) objPtr->internalRep.twoPtrValue.ptr1; |
|
|
|
|
|
if (cursorPtr != NULL) { |
|
|
cursorPtr->objRefCount--; |
|
|
if ((cursorPtr->objRefCount == 0) |
|
|
&& (cursorPtr->resourceRefCount == 0)) { |
|
|
ckfree((char *) cursorPtr); |
|
|
} |
|
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*--------------------------------------------------------------------------- |
|
|
* |
|
|
* DupCursorObjProc -- |
|
|
* |
|
|
* When a cached cursor object is duplicated, this is called to |
|
|
* update the internal reps. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The color's objRefCount is incremented and the internal rep |
|
|
* of the copy is set to point to it. |
|
|
* |
|
|
*--------------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DupCursorObjProc(srcObjPtr, dupObjPtr) |
|
|
Tcl_Obj *srcObjPtr; /* The object we are copying from. */ |
|
|
Tcl_Obj *dupObjPtr; /* The object we are copying to. */ |
|
|
{ |
|
|
TkCursor *cursorPtr = (TkCursor *) srcObjPtr->internalRep.twoPtrValue.ptr1; |
|
|
|
|
|
dupObjPtr->typePtr = srcObjPtr->typePtr; |
|
|
dupObjPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr; |
|
|
|
|
|
if (cursorPtr != NULL) { |
|
|
cursorPtr->objRefCount++; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* Tk_GetCursorFromObj -- |
|
|
* |
|
|
* Returns the cursor referred to buy a Tcl object. The cursor must |
|
|
* already have been allocated via a call to Tk_AllocCursorFromObj or |
|
|
* Tk_GetCursor. |
|
|
* |
|
|
* Results: |
|
|
* Returns the Tk_Cursor that matches the tkwin and the string rep |
|
|
* of the name of the cursor given in objPtr. |
|
|
* |
|
|
* Side effects: |
|
|
* If the object is not already a cursor, the conversion will free |
|
|
* any old internal representation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tk_Cursor |
|
|
Tk_GetCursorFromObj(tkwin, objPtr) |
|
|
Tk_Window tkwin; |
|
|
Tcl_Obj *objPtr; /* The object from which to get pixels. */ |
|
|
{ |
|
|
TkCursor *cursorPtr = GetCursorFromObj(tkwin, objPtr); |
|
|
/* GetCursorFromObj should never return NULL */ |
|
|
return cursorPtr->cursor; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* GetCursorFromObj -- |
|
|
* |
|
|
* Returns the cursor referred to by a Tcl object. The cursor must |
|
|
* already have been allocated via a call to Tk_AllocCursorFromObj |
|
|
* or Tk_GetCursor. |
|
|
* |
|
|
* Results: |
|
|
* Returns the TkCursor * that matches the tkwin and the string rep |
|
|
* of the name of the cursor given in objPtr. |
|
|
* |
|
|
* Side effects: |
|
|
* If the object is not already a cursor, the conversion will free |
|
|
* any old internal representation. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static TkCursor * |
|
|
GetCursorFromObj(tkwin, objPtr) |
|
|
Tk_Window tkwin; /* Window in which the cursor will be used. */ |
|
|
Tcl_Obj *objPtr; /* The object that describes the desired |
|
|
* cursor. */ |
|
|
{ |
|
|
TkCursor *cursorPtr; |
|
|
Tcl_HashEntry *hashPtr; |
|
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; |
|
|
|
|
|
if (objPtr->typePtr != &cursorObjType) { |
|
|
InitCursorObj(objPtr); |
|
|
} |
|
|
|
|
|
cursorPtr = (TkCursor *) objPtr->internalRep.twoPtrValue.ptr1; |
|
|
if (cursorPtr != NULL) { |
|
|
if (Tk_Display(tkwin) == cursorPtr->display) { |
|
|
return cursorPtr; |
|
|
} |
|
|
hashPtr = cursorPtr->hashPtr; |
|
|
} else { |
|
|
hashPtr = Tcl_FindHashEntry(&dispPtr->cursorNameTable, |
|
|
Tcl_GetString(objPtr)); |
|
|
if (hashPtr == NULL) { |
|
|
goto error; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* At this point we've got a hash table entry, off of which hang |
|
|
* one or more TkCursor structures. See if any of them will work. |
|
|
*/ |
|
|
|
|
|
for (cursorPtr = (TkCursor *) Tcl_GetHashValue(hashPtr); |
|
|
cursorPtr != NULL; cursorPtr = cursorPtr->nextPtr) { |
|
|
if (Tk_Display(tkwin) == cursorPtr->display) { |
|
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr; |
|
|
cursorPtr->objRefCount++; |
|
|
return cursorPtr; |
|
|
} |
|
|
} |
|
|
|
|
|
error: |
|
|
panic("GetCursorFromObj called with non-existent cursor!"); |
|
|
/* |
|
|
* The following code isn't reached; it's just there to please compilers. |
|
|
*/ |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* InitCursorObj -- |
|
|
* |
|
|
* Bookeeping procedure to change an objPtr to a cursor type. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The old internal rep of the object is freed. The internal |
|
|
* rep is cleared. The final form of the object is set |
|
|
* by either Tk_AllocCursorFromObj or GetCursorFromObj. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
InitCursorObj(objPtr) |
|
|
Tcl_Obj *objPtr; /* The object to convert. */ |
|
|
{ |
|
|
Tcl_ObjType *typePtr; |
|
|
|
|
|
/* |
|
|
* Free the old internalRep before setting the new one. |
|
|
*/ |
|
|
|
|
|
Tcl_GetString(objPtr); |
|
|
typePtr = objPtr->typePtr; |
|
|
if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) { |
|
|
(*typePtr->freeIntRepProc)(objPtr); |
|
|
} |
|
|
objPtr->typePtr = &cursorObjType; |
|
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* CursorInit -- |
|
|
* |
|
|
* Initialize the structures used for cursor management. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Read the code. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
CursorInit(dispPtr) |
|
|
TkDisplay *dispPtr; /* Display used to store thread-specific data. */ |
|
|
{ |
|
|
Tcl_InitHashTable(&dispPtr->cursorNameTable, TCL_STRING_KEYS); |
|
|
Tcl_InitHashTable(&dispPtr->cursorDataTable, sizeof(DataKey)/sizeof(int)); |
|
|
|
|
|
/* |
|
|
* The call below is tricky: can't use sizeof(IdKey) because it |
|
|
* gets padded with extra unpredictable bytes on some 64-bit |
|
|
* machines. |
|
|
*/ |
|
|
|
|
|
/* |
|
|
* Old code.... |
|
|
* Tcl_InitHashTable(&dispPtr->cursorIdTable, sizeof(Display *) |
|
|
* /sizeof(int)); |
|
|
* |
|
|
* The comment above doesn't make sense. |
|
|
* However, XIDs should only be 32 bits, by the definition of X, |
|
|
* so the code above causes Tk to crash. Here is the real code: |
|
|
*/ |
|
|
|
|
|
Tcl_InitHashTable(&dispPtr->cursorIdTable, TCL_ONE_WORD_KEYS); |
|
|
|
|
|
dispPtr->cursorInit = 1; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkDebugCursor -- |
|
|
* |
|
|
* This procedure returns debugging information about a cursor. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a list with one sublist for each TkCursor |
|
|
* corresponding to "name". Each sublist has two elements that |
|
|
* contain the resourceRefCount and objRefCount fields from the |
|
|
* TkCursor structure. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
Tcl_Obj * |
|
|
TkDebugCursor(tkwin, name) |
|
|
Tk_Window tkwin; /* The window in which the cursor will be |
|
|
* used (not currently used). */ |
|
|
char *name; /* Name of the desired color. */ |
|
|
{ |
|
|
TkCursor *cursorPtr; |
|
|
Tcl_HashEntry *hashPtr; |
|
|
Tcl_Obj *resultPtr, *objPtr; |
|
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; |
|
|
|
|
|
resultPtr = Tcl_NewObj(); |
|
|
hashPtr = Tcl_FindHashEntry(&dispPtr->cursorNameTable, name); |
|
|
if (hashPtr != NULL) { |
|
|
cursorPtr = (TkCursor *) Tcl_GetHashValue(hashPtr); |
|
|
if (cursorPtr == NULL) { |
|
|
panic("TkDebugCursor found empty hash table entry"); |
|
|
} |
|
|
for ( ; (cursorPtr != NULL); cursorPtr = cursorPtr->nextPtr) { |
|
|
objPtr = Tcl_NewObj(); |
|
|
Tcl_ListObjAppendElement(NULL, objPtr, |
|
|
Tcl_NewIntObj(cursorPtr->resourceRefCount)); |
|
|
Tcl_ListObjAppendElement(NULL, objPtr, |
|
|
Tcl_NewIntObj(cursorPtr->objRefCount)); |
|
|
Tcl_ListObjAppendElement(NULL, resultPtr, objPtr); |
|
|
} |
|
|
} |
|
|
return resultPtr; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkCursor.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 2:39a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKCURSOR.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkCursor.c -- |
| 5 |
|
* |
| 6 |
|
* This file maintains a database of read-only cursors for the Tk |
| 7 |
|
* toolkit. This allows cursors to be shared between widgets and |
| 8 |
|
* also avoids round-trips to the X server. |
| 9 |
|
* |
| 10 |
|
* Copyright (c) 1990-1994 The Regents of the University of California. |
| 11 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 12 |
|
* |
| 13 |
|
* See the file "license.terms" for information on usage and redistribution |
| 14 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 15 |
|
* |
| 16 |
|
* RCS: @(#) $Id: tkcursor.c,v 1.1.1.1 2001/06/13 04:59:04 dtashley Exp $ |
| 17 |
|
*/ |
| 18 |
|
|
| 19 |
|
#include "tkPort.h" |
| 20 |
|
#include "tkInt.h" |
| 21 |
|
|
| 22 |
|
/* |
| 23 |
|
* A TkCursor structure exists for each cursor that is currently |
| 24 |
|
* active. Each structure is indexed with two hash tables defined |
| 25 |
|
* below. One of the tables is cursorIdTable, and the other is either |
| 26 |
|
* cursorNameTable or cursorDataTable, each of which are stored in the |
| 27 |
|
* TkDisplay structure for the current thread. |
| 28 |
|
*/ |
| 29 |
|
|
| 30 |
|
typedef struct { |
| 31 |
|
char *source; /* Cursor bits. */ |
| 32 |
|
char *mask; /* Mask bits. */ |
| 33 |
|
int width, height; /* Dimensions of cursor (and data |
| 34 |
|
* and mask). */ |
| 35 |
|
int xHot, yHot; /* Location of cursor hot-spot. */ |
| 36 |
|
Tk_Uid fg, bg; /* Colors for cursor. */ |
| 37 |
|
Display *display; /* Display on which cursor will be used. */ |
| 38 |
|
} DataKey; |
| 39 |
|
|
| 40 |
|
/* |
| 41 |
|
* Forward declarations for procedures defined in this file: |
| 42 |
|
*/ |
| 43 |
|
|
| 44 |
|
static void CursorInit _ANSI_ARGS_((TkDisplay *dispPtr)); |
| 45 |
|
static void DupCursorObjProc _ANSI_ARGS_((Tcl_Obj *srcObjPtr, |
| 46 |
|
Tcl_Obj *dupObjPtr)); |
| 47 |
|
static void FreeCursor _ANSI_ARGS_((TkCursor *cursorPtr)); |
| 48 |
|
static void FreeCursorObjProc _ANSI_ARGS_((Tcl_Obj *objPtr)); |
| 49 |
|
static TkCursor * GetCursor _ANSI_ARGS_((Tcl_Interp *interp, |
| 50 |
|
Tk_Window tkwin, char *name)); |
| 51 |
|
static TkCursor * GetCursorFromObj _ANSI_ARGS_((Tk_Window tkwin, |
| 52 |
|
Tcl_Obj *objPtr)); |
| 53 |
|
static void InitCursorObj _ANSI_ARGS_((Tcl_Obj *objPtr)); |
| 54 |
|
|
| 55 |
|
/* |
| 56 |
|
* The following structure defines the implementation of the "cursor" Tcl |
| 57 |
|
* object, used for drawing. The color object remembers the hash table |
| 58 |
|
* entry associated with a color. The actual allocation and deallocation |
| 59 |
|
* of the color should be done by the configuration package when the cursor |
| 60 |
|
* option is set. |
| 61 |
|
*/ |
| 62 |
|
|
| 63 |
|
static Tcl_ObjType cursorObjType = { |
| 64 |
|
"cursor", /* name */ |
| 65 |
|
FreeCursorObjProc, /* freeIntRepProc */ |
| 66 |
|
DupCursorObjProc, /* dupIntRepProc */ |
| 67 |
|
NULL, /* updateStringProc */ |
| 68 |
|
NULL /* setFromAnyProc */ |
| 69 |
|
}; |
| 70 |
|
|
| 71 |
|
/* |
| 72 |
|
*---------------------------------------------------------------------- |
| 73 |
|
* |
| 74 |
|
* Tk_AllocCursorFromObj -- |
| 75 |
|
* |
| 76 |
|
* Given a Tcl_Obj *, map the value to a corresponding |
| 77 |
|
* Tk_Cursor structure based on the tkwin given. |
| 78 |
|
* |
| 79 |
|
* Results: |
| 80 |
|
* The return value is the X identifer for the desired cursor, |
| 81 |
|
* unless objPtr couldn't be parsed correctly. In this case, |
| 82 |
|
* None is returned and an error message is left in the interp's result. |
| 83 |
|
* The caller should never modify the cursor that is returned, and |
| 84 |
|
* should eventually call Tk_FreeCursorFromObj when the cursor is no |
| 85 |
|
* longer needed. |
| 86 |
|
* |
| 87 |
|
* Side effects: |
| 88 |
|
* The cursor is added to an internal database with a reference count. |
| 89 |
|
* For each call to this procedure, there should eventually be a call |
| 90 |
|
* to Tk_FreeCursorFromObj, so that the database can be cleaned up |
| 91 |
|
* when cursors aren't needed anymore. |
| 92 |
|
* |
| 93 |
|
*---------------------------------------------------------------------- |
| 94 |
|
*/ |
| 95 |
|
|
| 96 |
|
Tk_Cursor |
| 97 |
|
Tk_AllocCursorFromObj(interp, tkwin, objPtr) |
| 98 |
|
Tcl_Interp *interp; /* Interp for error results. */ |
| 99 |
|
Tk_Window tkwin; /* Window in which the cursor will be used.*/ |
| 100 |
|
Tcl_Obj *objPtr; /* Object describing cursor; see manual |
| 101 |
|
* entry for description of legal |
| 102 |
|
* syntax of this obj's string rep. */ |
| 103 |
|
{ |
| 104 |
|
TkCursor *cursorPtr; |
| 105 |
|
|
| 106 |
|
if (objPtr->typePtr != &cursorObjType) { |
| 107 |
|
InitCursorObj(objPtr); |
| 108 |
|
} |
| 109 |
|
cursorPtr = (TkCursor *) objPtr->internalRep.twoPtrValue.ptr1; |
| 110 |
|
|
| 111 |
|
/* |
| 112 |
|
* If the object currently points to a TkCursor, see if it's the |
| 113 |
|
* one we want. If so, increment its reference count and return. |
| 114 |
|
*/ |
| 115 |
|
|
| 116 |
|
if (cursorPtr != NULL) { |
| 117 |
|
if (cursorPtr->resourceRefCount == 0) { |
| 118 |
|
/* |
| 119 |
|
* This is a stale reference: it refers to a TkCursor that's |
| 120 |
|
* no longer in use. Clear the reference. |
| 121 |
|
*/ |
| 122 |
|
FreeCursorObjProc(objPtr); |
| 123 |
|
cursorPtr = NULL; |
| 124 |
|
} else if (Tk_Display(tkwin) == cursorPtr->display) { |
| 125 |
|
cursorPtr->resourceRefCount++; |
| 126 |
|
return cursorPtr->cursor; |
| 127 |
|
} |
| 128 |
|
} |
| 129 |
|
|
| 130 |
|
/* |
| 131 |
|
* The object didn't point to the TkCursor that we wanted. Search |
| 132 |
|
* the list of TkCursors with the same name to see if one of the |
| 133 |
|
* other TkCursors is the right one. |
| 134 |
|
*/ |
| 135 |
|
|
| 136 |
|
if (cursorPtr != NULL) { |
| 137 |
|
TkCursor *firstCursorPtr = |
| 138 |
|
(TkCursor *) Tcl_GetHashValue(cursorPtr->hashPtr); |
| 139 |
|
FreeCursorObjProc(objPtr); |
| 140 |
|
for (cursorPtr = firstCursorPtr; cursorPtr != NULL; |
| 141 |
|
cursorPtr = cursorPtr->nextPtr) { |
| 142 |
|
if (Tk_Display(tkwin) == cursorPtr->display) { |
| 143 |
|
cursorPtr->resourceRefCount++; |
| 144 |
|
cursorPtr->objRefCount++; |
| 145 |
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr; |
| 146 |
|
return cursorPtr->cursor; |
| 147 |
|
} |
| 148 |
|
} |
| 149 |
|
} |
| 150 |
|
|
| 151 |
|
/* |
| 152 |
|
* Still no luck. Call GetCursor to allocate a new TkCursor object. |
| 153 |
|
*/ |
| 154 |
|
|
| 155 |
|
cursorPtr = GetCursor(interp, tkwin, Tcl_GetString(objPtr)); |
| 156 |
|
objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) cursorPtr; |
| 157 |
|
if (cursorPtr == NULL) { |
| 158 |
|
return None; |
| 159 |
|
} else { |
| 160 |
|
cursorPtr->objRefCount++; |
| 161 |
|
return cursorPtr->cursor; |
| 162 |
|
} |
| 163 |
|
} |
| 164 |
|
|
| 165 |
|
/* |
| 166 |
|
*---------------------------------------------------------------------- |
| 167 |
|
* |
| 168 |
|
* Tk_GetCursor -- |
| 169 |
|
* |
| 170 |
|
* Given a string describing a cursor, locate (or create if necessary) |
| 171 |
|
* a cursor that fits the description. |
| 172 |
|
* |
| 173 |
|
* Results: |
| 174 |
|
* The return value is the X identifer for the desired cursor, |
| 175 |
|
* unless string couldn't be parsed correctly. In this case, |
| 176 |
|
* None is returned and an error message is left in the interp's result. |
| 177 |
|
* The caller should never modify the cursor that is returned, and |
| 178 |
|
* should eventually call Tk_FreeCursor when the cursor is no longer |
| 179 |
|
* needed. |
| 180 |
|
* |
| 181 |
|
* Side effects: |
| 182 |
|
* The cursor is added to an internal database with a reference count. |
| 183 |
|
* For each call to this procedure, there should eventually be a call |
| 184 |
|
* to Tk_FreeCursor, so that the database can be cleaned up when cursors |
| 185 |
|
* aren't needed anymore. |
| 186 |
|
* |
| 187 |
|
*---------------------------------------------------------------------- |
| 188 |
|
*/ |
| 189 |
|
|
| 190 |
|
Tk_Cursor |
| 191 |
|
Tk_GetCursor(interp, tkwin, string) |
| 192 |
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
| 193 |
|
Tk_Window tkwin; /* Window in which cursor will be used. */ |
| 194 |
|
char *string; /* Description of cursor. See manual entry |
| 195 |
|
* for details on legal syntax. */ |
| 196 |
|
{ |
| 197 |
|
TkCursor *cursorPtr = GetCursor(interp, tkwin, string); |
| 198 |
|
if (cursorPtr == NULL) { |
| 199 |
|
return None; |
| 200 |
|
} |
| 201 |
|
return cursorPtr->cursor; |
| 202 |
|
} |
| 203 |
|
|
| 204 |
|
/* |
| 205 |
|
*---------------------------------------------------------------------- |
| 206 |
|
* |
| 207 |
|
* GetCursor -- |
| 208 |
|
* |
| 209 |
|
* Given a string describing a cursor, locate (or create if necessary) |
| 210 |
|
* a cursor that fits the description. This routine returns the |
| 211 |
|
* internal data structure for the cursor, which avoids extra |
| 212 |
|
* hash table lookups in Tk_AllocCursorFromObj. |
| 213 |
|
* |
| 214 |
|
* Results: |
| 215 |
|
* The return value is a pointer to the TkCursor for the desired |
| 216 |
|
* cursor, unless string couldn't be parsed correctly. In this |
| 217 |
|
* case, NULL is returned and an error message is left in the |
| 218 |
|
* interp's result. The caller should never modify the cursor that |
| 219 |
|
* is returned, and should eventually call Tk_FreeCursor when the |
| 220 |
|
* cursor is no longer needed. |
| 221 |
|
* |
| 222 |
|
* Side effects: |
| 223 |
|
* The cursor is added to an internal database with a reference count. |
| 224 |
|
* For each call to this procedure, there should eventually be a call |
| 225 |
|
* to Tk_FreeCursor, so that the database can be cleaned up when cursors |
| 226 |
|
* aren't needed anymore. |
| 227 |
|
* |
| 228 |
|
*---------------------------------------------------------------------- |
| 229 |
|
*/ |
| 230 |
|
|
| 231 |
|
static TkCursor * |
| 232 |
|
GetCursor(interp, tkwin, string) |
| 233 |
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
| 234 |
|
Tk_Window tkwin; /* Window in which cursor will be used. */ |
| 235 |
|
char *string; /* Description of cursor. See manual entry |
| 236 |
|
* for details on legal syntax. */ |
| 237 |
|
{ |
| 238 |
|
Tcl_HashEntry *nameHashPtr; |
| 239 |
|
register TkCursor *cursorPtr; |
| 240 |
|
TkCursor *existingCursorPtr = NULL; |
| 241 |
|
int new; |
| 242 |
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; |
| 243 |
|
|
| 244 |
|
if (!dispPtr->cursorInit) { |
| 245 |
|
CursorInit(dispPtr); |
| 246 |
|
} |
| 247 |
|
|
| 248 |
|
nameHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorNameTable, |
| 249 |
|
string, &new); |
| 250 |
|
if (!new) { |
| 251 |
|
existingCursorPtr = (TkCursor *) Tcl_GetHashValue(nameHashPtr); |
| 252 |
|
for (cursorPtr = existingCursorPtr; cursorPtr != NULL; |
| 253 |
|
cursorPtr = cursorPtr->nextPtr) { |
| 254 |
|
if (Tk_Display(tkwin) == cursorPtr->display) { |
| 255 |
|
cursorPtr->resourceRefCount++; |
| 256 |
|
return cursorPtr; |
| 257 |
|
} |
| 258 |
|
} |
| 259 |
|
} else { |
| 260 |
|
existingCursorPtr = NULL; |
| 261 |
|
} |
| 262 |
|
|
| 263 |
|
cursorPtr = TkGetCursorByName(interp, tkwin, string); |
| 264 |
|
|
| 265 |
|
if (cursorPtr == NULL) { |
| 266 |
|
if (new) { |
| 267 |
|
Tcl_DeleteHashEntry(nameHashPtr); |
| 268 |
|
} |
| 269 |
|
return NULL; |
| 270 |
|
} |
| 271 |
|
|
| 272 |
|
/* |
| 273 |
|
* Add information about this cursor to our database. |
| 274 |
|
*/ |
| 275 |
|
|
| 276 |
|
cursorPtr->display = Tk_Display(tkwin); |
| 277 |
|
cursorPtr->resourceRefCount = 1; |
| 278 |
|
cursorPtr->objRefCount = 0; |
| 279 |
|
cursorPtr->otherTable = &dispPtr->cursorNameTable; |
| 280 |
|
cursorPtr->hashPtr = nameHashPtr; |
| 281 |
|
cursorPtr->idHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorIdTable, |
| 282 |
|
(char *) cursorPtr->cursor, &new); |
| 283 |
|
if (!new) { |
| 284 |
|
panic("cursor already registered in Tk_GetCursor"); |
| 285 |
|
} |
| 286 |
|
cursorPtr->nextPtr = existingCursorPtr; |
| 287 |
|
Tcl_SetHashValue(nameHashPtr, cursorPtr); |
| 288 |
|
Tcl_SetHashValue(cursorPtr->idHashPtr, cursorPtr); |
| 289 |
|
|
| 290 |
|
return cursorPtr; |
| 291 |
|
} |
| 292 |
|
|
| 293 |
|
/* |
| 294 |
|
*---------------------------------------------------------------------- |
| 295 |
|
* |
| 296 |
|
* Tk_GetCursorFromData -- |
| 297 |
|
* |
| 298 |
|
* Given a description of the bits and colors for a cursor, |
| 299 |
|
* make a cursor that has the given properties. |
| 300 |
|
* |
| 301 |
|
* Results: |
| 302 |
|
* The return value is the X identifer for the desired cursor, |
| 303 |
|
* unless it couldn't be created properly. In this case, None is |
| 304 |
|
* returned and an error message is left in the interp's result. The |
| 305 |
|
* caller should never modify the cursor that is returned, and |
| 306 |
|
* should eventually call Tk_FreeCursor when the cursor is no |
| 307 |
|
* longer needed. |
| 308 |
|
* |
| 309 |
|
* Side effects: |
| 310 |
|
* The cursor is added to an internal database with a reference count. |
| 311 |
|
* For each call to this procedure, there should eventually be a call |
| 312 |
|
* to Tk_FreeCursor, so that the database can be cleaned up when cursors |
| 313 |
|
* aren't needed anymore. |
| 314 |
|
* |
| 315 |
|
*---------------------------------------------------------------------- |
| 316 |
|
*/ |
| 317 |
|
|
| 318 |
|
Tk_Cursor |
| 319 |
|
Tk_GetCursorFromData(interp, tkwin, source, mask, width, height, |
| 320 |
|
xHot, yHot, fg, bg) |
| 321 |
|
Tcl_Interp *interp; /* Interpreter to use for error reporting. */ |
| 322 |
|
Tk_Window tkwin; /* Window in which cursor will be used. */ |
| 323 |
|
char *source; /* Bitmap data for cursor shape. */ |
| 324 |
|
char *mask; /* Bitmap data for cursor mask. */ |
| 325 |
|
int width, height; /* Dimensions of cursor. */ |
| 326 |
|
int xHot, yHot; /* Location of hot-spot in cursor. */ |
| 327 |
|
Tk_Uid fg; /* Foreground color for cursor. */ |
| 328 |
|
Tk_Uid bg; /* Background color for cursor. */ |
| 329 |
|
{ |
| 330 |
|
DataKey dataKey; |
| 331 |
|
Tcl_HashEntry *dataHashPtr; |
| 332 |
|
register TkCursor *cursorPtr; |
| 333 |
|
int new; |
| 334 |
|
XColor fgColor, bgColor; |
| 335 |
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; |
| 336 |
|
|
| 337 |
|
|
| 338 |
|
if (!dispPtr->cursorInit) { |
| 339 |
|
CursorInit(dispPtr); |
| 340 |
|
} |
| 341 |
|
|
| 342 |
|
dataKey.source = source; |
| 343 |
|
dataKey.mask = mask; |
| 344 |
|
dataKey.width = width; |
| 345 |
|
dataKey.height = height; |
| 346 |
|
dataKey.xHot = xHot; |
| 347 |
|
dataKey.yHot = yHot; |
| 348 |
|
dataKey.fg = fg; |
| 349 |
|
dataKey.bg = bg; |
| 350 |
|
dataKey.display = Tk_Display(tkwin); |
| 351 |
|
dataHashPtr = Tcl_CreateHashEntry(&dispPtr->cursorDataTable, |
| 352 |
|
(char *) &dataKey, &new); |
| 353 |
|
if (!new) { |
| 354 |
|
cursorPtr = (TkCursor *) Tcl_GetHashValue(dataHashPtr); |
| 355 |
|
cursorPtr->resourceRefCount++; |
| 356 |
|
return cursorPtr->cursor; |
| 357 |
|
} |
| 358 |
|
|
| 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 |
|
/* End of tkcursor.c */ |
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