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-rwxr-xr-xxfixes/cursor.c297
1 files changed, 295 insertions, 2 deletions
diff --git a/xfixes/cursor.c b/xfixes/cursor.c
index 6895b6f00..c75e74442 100755
--- a/xfixes/cursor.c
+++ b/xfixes/cursor.c
@@ -1,6 +1,26 @@
/*
* $Id$
*
+ * Copyright © 2006 Sun Microsystems
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Sun Microsystems not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Sun Microsystems makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
* Copyright © 2002 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
@@ -35,10 +55,14 @@
#include "windowstr.h"
static RESTYPE CursorClientType;
+static RESTYPE CursorHideCountType;
static RESTYPE CursorWindowType;
static int CursorScreenPrivateIndex = -1;
static int CursorGeneration;
static CursorPtr CursorCurrent;
+static CursorPtr pInvisibleCursor = NULL;
+
+static void deleteCursorHideCountsForScreen (ScreenPtr pScreen);
#define VERIFY_CURSOR(pCursor, cursor, client, access) { \
pCursor = (CursorPtr)SecurityLookupIDByType((client), (cursor), \
@@ -66,12 +90,29 @@ typedef struct _CursorEvent {
static CursorEventPtr cursorEvents;
/*
+ * Each screen has a list of clients which have requested
+ * that the cursor be hid, and the number of times each
+ * client has requested.
+*/
+
+typedef struct _CursorHideCountRec *CursorHideCountPtr;
+
+typedef struct _CursorHideCountRec {
+ CursorHideCountPtr pNext;
+ ClientPtr pClient;
+ ScreenPtr pScreen;
+ int hideCount;
+ XID resource;
+} CursorHideCountRec;
+
+/*
* Wrap DisplayCursor to catch cursor change events
*/
typedef struct _CursorScreen {
DisplayCursorProcPtr DisplayCursor;
CloseScreenProcPtr CloseScreen;
+ CursorHideCountPtr pCursorHideCounts;
} CursorScreenRec, *CursorScreenPtr;
#define GetCursorScreen(s) ((CursorScreenPtr) ((s)->devPrivates[CursorScreenPrivateIndex].ptr))
@@ -88,7 +129,13 @@ CursorDisplayCursor (ScreenPtr pScreen,
Bool ret;
Unwrap (cs, pScreen, DisplayCursor);
- ret = (*pScreen->DisplayCursor) (pScreen, pCursor);
+
+ if (cs->pCursorHideCounts != NULL) {
+ ret = (*pScreen->DisplayCursor) (pScreen, pInvisibleCursor);
+ } else {
+ ret = (*pScreen->DisplayCursor) (pScreen, pCursor);
+ }
+
if (pCursor != CursorCurrent)
{
CursorEventPtr e;
@@ -122,6 +169,7 @@ CursorCloseScreen (int index, ScreenPtr pScreen)
Unwrap (cs, pScreen, CloseScreen);
Unwrap (cs, pScreen, DisplayCursor);
+ deleteCursorHideCountsForScreen(pScreen);
ret = (*pScreen->CloseScreen) (index, pScreen);
xfree (cs);
if (index == 0)
@@ -430,7 +478,7 @@ int
SProcXFixesGetCursorName (ClientPtr client)
{
int n;
- REQUEST(xXFixesSetCursorNameReq);
+ REQUEST(xXFixesGetCursorNameReq);
swaps (&stuff->length, n);
REQUEST_SIZE_MATCH(xXFixesGetCursorNameReq);
@@ -687,6 +735,199 @@ SProcXFixesChangeCursorByName (ClientPtr client)
return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
}
+/*
+ * Routines for manipulating the per-screen hide counts list.
+ * This list indicates which clients have requested cursor hiding
+ * for that screen.
+ */
+
+/* Return the screen's hide-counts list element for the given client */
+static CursorHideCountPtr
+findCursorHideCount (ClientPtr pClient, ScreenPtr pScreen)
+{
+ CursorScreenPtr cs = GetCursorScreen(pScreen);
+ CursorHideCountPtr pChc;
+
+ for (pChc = cs->pCursorHideCounts; pChc != NULL; pChc = pChc->pNext) {
+ if (pChc->pClient == pClient) {
+ return pChc;
+ }
+ }
+
+ return NULL;
+}
+
+static int
+createCursorHideCount (ClientPtr pClient, ScreenPtr pScreen)
+{
+ CursorScreenPtr cs = GetCursorScreen(pScreen);
+ CursorHideCountPtr pChc;
+
+ pChc = (CursorHideCountPtr) xalloc(sizeof(CursorHideCountRec));
+ if (pChc == NULL) {
+ return BadAlloc;
+ }
+ pChc->pClient = pClient;
+ pChc->pScreen = pScreen;
+ pChc->hideCount = 1;
+ pChc->resource = FakeClientID(pClient->index);
+ pChc->pNext = cs->pCursorHideCounts;
+ cs->pCursorHideCounts = pChc;
+
+ /*
+ * Create a resource for this element so it can be deleted
+ * when the client goes away.
+ */
+ if (!AddResource (pChc->resource, CursorHideCountType,
+ (pointer) pChc)) {
+ xfree(pChc);
+ return BadAlloc;
+ }
+
+ return Success;
+}
+
+/*
+ * Delete the given hide-counts list element from its screen list.
+ */
+static void
+deleteCursorHideCount (CursorHideCountPtr pChcToDel, ScreenPtr pScreen)
+{
+ CursorScreenPtr cs = GetCursorScreen(pScreen);
+ CursorHideCountPtr pChc, pNext;
+ CursorHideCountPtr pChcLast = NULL;
+
+ pChc = cs->pCursorHideCounts;
+ while (pChc != NULL) {
+ pNext = pChc->pNext;
+ if (pChc == pChcToDel) {
+ xfree(pChc);
+ if (pChcLast == NULL) {
+ cs->pCursorHideCounts = pNext;
+ } else {
+ pChcLast->pNext = pNext;
+ }
+ return;
+ }
+ pChcLast = pChc;
+ pChc = pNext;
+ }
+}
+
+/*
+ * Delete all the hide-counts list elements for this screen.
+ */
+static void
+deleteCursorHideCountsForScreen (ScreenPtr pScreen)
+{
+ CursorScreenPtr cs = GetCursorScreen(pScreen);
+ CursorHideCountPtr pChc, pTmp;
+
+ pChc = cs->pCursorHideCounts;
+ while (pChc != NULL) {
+ pTmp = pChc->pNext;
+ FreeResource(pChc->resource, 0);
+ pChc = pTmp;
+ }
+ cs->pCursorHideCounts = NULL;
+}
+
+int
+ProcXFixesHideCursor (ClientPtr client)
+{
+ WindowPtr pWin;
+ CursorHideCountPtr pChc;
+ REQUEST(xXFixesHideCursorReq);
+ int ret;
+
+ REQUEST_SIZE_MATCH (xXFixesHideCursorReq);
+
+ pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
+ if (!pWin) {
+ client->errorValue = stuff->window;
+ return BadWindow;
+ }
+
+ /*
+ * Has client hidden the cursor before on this screen?
+ * If so, just increment the count.
+ */
+
+ pChc = findCursorHideCount(client, pWin->drawable.pScreen);
+ if (pChc != NULL) {
+ pChc->hideCount++;
+ return client->noClientException;
+ }
+
+ /*
+ * This is the first time this client has hid the cursor
+ * for this screen.
+ */
+ ret = createCursorHideCount(client, pWin->drawable.pScreen);
+
+ if (ret == Success) {
+ (void) CursorDisplayCursor(pWin->drawable.pScreen, CursorCurrent);
+ }
+
+ return ret;
+}
+
+int
+SProcXFixesHideCursor (ClientPtr client)
+{
+ int n;
+ REQUEST(xXFixesHideCursorReq);
+
+ swaps (&stuff->length, n);
+ REQUEST_SIZE_MATCH (xXFixesHideCursorReq);
+ swapl (&stuff->window, n);
+ return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
+}
+
+int
+ProcXFixesShowCursor (ClientPtr client)
+{
+ WindowPtr pWin;
+ CursorHideCountPtr pChc;
+ REQUEST(xXFixesShowCursorReq);
+
+ REQUEST_SIZE_MATCH (xXFixesShowCursorReq);
+
+ pWin = (WindowPtr) LookupIDByType (stuff->window, RT_WINDOW);
+ if (!pWin) {
+ client->errorValue = stuff->window;
+ return BadWindow;
+ }
+
+ /*
+ * Has client hidden the cursor on this screen?
+ * If not, generate an error.
+ */
+ pChc = findCursorHideCount(client, pWin->drawable.pScreen);
+ if (pChc == NULL) {
+ return BadMatch;
+ }
+
+ pChc->hideCount--;
+ if (pChc->hideCount <= 0) {
+ FreeResource(pChc->resource, 0);
+ }
+
+ return (client->noClientException);
+}
+
+int
+SProcXFixesShowCursor (ClientPtr client)
+{
+ int n;
+ REQUEST(xXFixesShowCursorReq);
+
+ swaps (&stuff->length, n);
+ REQUEST_SIZE_MATCH (xXFixesShowCursorReq);
+ swapl (&stuff->window, n);
+ return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
+}
+
static int
CursorFreeClient (pointer data, XID id)
{
@@ -706,6 +947,18 @@ CursorFreeClient (pointer data, XID id)
}
static int
+CursorFreeHideCount (pointer data, XID id)
+{
+ CursorHideCountPtr pChc = (CursorHideCountPtr) data;
+ ScreenPtr pScreen = pChc->pScreen;
+
+ deleteCursorHideCount(pChc, pChc->pScreen);
+ (void) CursorDisplayCursor(pScreen, CursorCurrent);
+
+ return 1;
+}
+
+static int
CursorFreeWindow (pointer data, XID id)
{
WindowPtr pWindow = (WindowPtr) data;
@@ -722,6 +975,36 @@ CursorFreeWindow (pointer data, XID id)
return 1;
}
+static CursorPtr
+createInvisibleCursor (void)
+{
+ CursorPtr pCursor;
+ static unsigned int *psrcbits, *pmaskbits;
+ CursorMetricRec cm;
+
+ psrcbits = (unsigned int *) xalloc(4);
+ pmaskbits = (unsigned int *) xalloc(4);
+ if (psrcbits == NULL || pmaskbits == NULL) {
+ return NULL;
+ }
+ *psrcbits = 0;
+ *pmaskbits = 0;
+
+ cm.width = 1;
+ cm.height = 1;
+ cm.xhot = 0;
+ cm.yhot = 0;
+
+ pCursor = AllocCursor(
+ (unsigned char *)psrcbits,
+ (unsigned char *)pmaskbits,
+ &cm,
+ 0, 0, 0,
+ 0, 0, 0);
+
+ return pCursor;
+}
+
Bool
XFixesCursorInit (void)
{
@@ -744,10 +1027,20 @@ XFixesCursorInit (void)
return FALSE;
Wrap (cs, pScreen, CloseScreen, CursorCloseScreen);
Wrap (cs, pScreen, DisplayCursor, CursorDisplayCursor);
+ cs->pCursorHideCounts = NULL;
SetCursorScreen (pScreen, cs);
}
CursorClientType = CreateNewResourceType(CursorFreeClient);
+ CursorHideCountType = CreateNewResourceType(CursorFreeHideCount);
CursorWindowType = CreateNewResourceType(CursorFreeWindow);
+
+ if (pInvisibleCursor == NULL) {
+ pInvisibleCursor = createInvisibleCursor();
+ if (pInvisibleCursor == NULL) {
+ return BadAlloc;
+ }
+ }
+
return CursorClientType && CursorWindowType;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 22:29:47 +0000