Lift XFIXES to xorg-xserver-7.1/1.1.0 state (XFIXES 4.0)

1 files changed, 273 insertions, 2 deletions

diff --git a/nx-X11/programs/Xserver/xfixes/cursor.c b/nx-X11/programs/Xserver/xfixes/cursor.c
index 00a912be3..e0705ed0a 100644
--- a/nx-X11/programs/Xserver/xfixes/cursor.c
+++ b/nx-X11/programs/Xserver/xfixes/cursor.c
@@ -35,10 +35,14 @@
 #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 +70,29 @@ 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 +109,13 @@ 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;
@@ -96,7 +123,7 @@ CursorDisplayCursor (ScreenPtr pScreen,
 	CursorCurrent = pCursor;
 	for (e = cursorEvents; e; e = e->next)
 	{
-	    if ((e->eventMask & XFixesDisplayCursorNotifyMask))
+	    if (e->eventMask & XFixesDisplayCursorNotifyMask)
 	    {
 		xXFixesCursorNotifyEvent	ev;
 		ev.type = XFixesEventBase + XFixesCursorNotify;
@@ -121,6 +148,7 @@ CursorCloseScreen (ScreenPtr pScreen)
 
     Unwrap (cs, pScreen, CloseScreen);
     Unwrap (cs, pScreen, DisplayCursor);
+    deleteCursorHideCountsForScreen(pScreen);
     ret = (*pScreen->CloseScreen) (pScreen);
     free (cs);
     if (screenInfo.numScreens <= 1)
@@ -674,6 +702,197 @@ 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) malloc(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,
+		      (void *) pChc)) {
+	free(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) {
+	    free(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)
+{
+    REQUEST(xXFixesHideCursorReq);
+
+    swaps (&stuff->length);
+    REQUEST_SIZE_MATCH (xXFixesHideCursorReq);
+    swapl (&stuff->window);
+    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)
+{
+    REQUEST(xXFixesShowCursorReq);
+
+    swaps (&stuff->length);
+    REQUEST_SIZE_MATCH (xXFixesShowCursorReq);
+    swapl (&stuff->window);
+    return (*ProcXFixesVector[stuff->xfixesReqType]) (client);
+}
+
 static int
 CursorFreeClient (void * data, XID id)
 {
@@ -693,6 +912,18 @@ CursorFreeClient (void * data, XID id)
 }
 
 static int
+CursorFreeHideCount (void * data, XID id)
+{
+    CursorHideCountPtr pChc = (CursorHideCountPtr) data;
+    ScreenPtr pScreen = pChc->pScreen;
+
+    deleteCursorHideCount(pChc, pChc->pScreen);
+    (void) CursorDisplayCursor(pScreen, CursorCurrent);
+
+    return 1;
+}
+
+static int
 CursorFreeWindow (void * data, XID id)
 {
     WindowPtr		pWindow = (WindowPtr) data;
@@ -709,6 +940,36 @@ CursorFreeWindow (void * data, XID id)
     return 1;
 }
 
+static CursorPtr
+createInvisibleCursor (void)
+{
+    CursorPtr pCursor;
+    static unsigned int *psrcbits, *pmaskbits;
+    CursorMetricRec cm;
+
+    psrcbits = (unsigned int *) malloc(4);
+    pmaskbits = (unsigned int *) malloc(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)
 {
@@ -731,10 +992,20 @@ 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;
 }