1 files changed, 182 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/randr/rrpointer.c b/nx-X11/programs/Xserver/randr/rrpointer.c
new file mode 100644
index 000000000..ace7d36a2
--- /dev/null
+++ b/nx-X11/programs/Xserver/randr/rrpointer.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright © 2006 Keith Packard
+ *
+ * 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 the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS 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.
+ */
+
+#include "randrstr.h"
+#include "inputstr.h"
+
+/*
+ * When the pointer moves, check to see if the specified position is outside
+ * any of theavailable CRTCs and move it to a 'sensible' place if so, where
+ * sensible is the closest monitor to the departing edge.
+ *
+ * Returns whether the position was adjusted
+ */
+
+static Bool
+RRCrtcContainsPosition(RRCrtcPtr crtc, int x, int y)
+{
+    RRModePtr mode = crtc->mode;
+    int scan_width, scan_height;
+
+    if (!mode)
+        return FALSE;
+
+    RRCrtcGetScanoutSize(crtc, &scan_width, &scan_height);
+
+    if (crtc->x <= x && x < crtc->x + scan_width &&
+        crtc->y <= y && y < crtc->y + scan_height)
+        return TRUE;
+    return FALSE;
+}
+
+/*
+ * Find the CRTC nearest the specified position, ignoring 'skip'
+ */
+static void
+RRPointerToNearestCrtc(
+#ifndef NXAGENT_SERVER
+                          DeviceIntPtr pDev,
+#endif                          /* !defined(NXAGENT_SERVER) */
+                          ScreenPtr pScreen, int x, int y, RRCrtcPtr skip)
+{
+    rrScrPriv(pScreen);
+    int c;
+    RRCrtcPtr nearest = NULL;
+    int best = 0;
+    int best_dx = 0, best_dy = 0;
+
+    for (c = 0; c < pScrPriv->numCrtcs; c++) {
+        RRCrtcPtr crtc = pScrPriv->crtcs[c];
+        RRModePtr mode = crtc->mode;
+        int dx, dy;
+        int dist;
+        int scan_width, scan_height;
+
+        if (!mode)
+            continue;
+        if (crtc == skip)
+            continue;
+
+        RRCrtcGetScanoutSize(crtc, &scan_width, &scan_height);
+
+        if (x < crtc->x)
+            dx = crtc->x - x;
+        else if (x > crtc->x + scan_width - 1)
+            dx = crtc->x + (scan_width - 1) - x;
+        else
+            dx = 0;
+        if (y < crtc->y)
+            dy = crtc->y - y;
+        else if (y > crtc->y + scan_height - 1)
+            dy = crtc->y + (scan_height - 1) - y;
+        else
+            dy = 0;
+        dist = dx * dx + dy * dy;
+        if (!nearest || dist < best) {
+            nearest = crtc;
+            best_dx = dx;
+            best_dy = dy;
+            best = dist;
+        }
+    }
+    if (best_dx || best_dy)
+        (*pScreen->SetCursorPosition) (
+#ifndef NXAGENT_SERVER
+                                          pDev,
+#endif                          /* !defined(NXAGENT_SERVER) */
+                                          pScreen, x + best_dx, y + best_dy,
+                                          TRUE);
+    pScrPriv->pointerCrtc = nearest;
+}
+
+void
+RRPointerMoved(ScreenPtr pScreen, int x, int y)
+{
+    rrScrPriv(pScreen);
+    RRCrtcPtr pointerCrtc = pScrPriv->pointerCrtc;
+    int c;
+
+    /* Check last known CRTC */
+    if (pointerCrtc && RRCrtcContainsPosition(pointerCrtc, x, y))
+        return;
+
+    /* Check all CRTCs */
+    for (c = 0; c < pScrPriv->numCrtcs; c++) {
+        RRCrtcPtr crtc = pScrPriv->crtcs[c];
+
+        if (RRCrtcContainsPosition(crtc, x, y)) {
+            /* Remember containing CRTC */
+            pScrPriv->pointerCrtc = crtc;
+            return;
+        }
+    }
+
+    /* None contain pointer, find nearest */
+    ErrorF("RRPointerMoved: Untested, may cause \"bogus pointer event\"\n");
+    RRPointerToNearestCrtc(
+#ifndef NXAGENT_SERVER
+                              inputInfo.pointer,
+#endif                          /* !defined(NXAGENT_SERVER) */
+                              pScreen, x, y, pointerCrtc);
+}
+
+/*
+ * When the screen is reconfigured, move all pointers to the nearest
+ * CRTC
+ */
+void
+RRPointerScreenConfigured(ScreenPtr pScreen)
+{
+    WindowPtr pRoot;
+    ScreenPtr pCurrentScreen;
+    int x, y;
+
+#ifndef NXAGENT_SERVER
+    DeviceIntPtr pDev;
+
+    for (pDev = inputInfo.devices; pDev; pDev = pDev->next) {
+        if (IsPointerDevice(pDev)) {
+#endif                          /* NXAGENT_SERVER */
+            pRoot = GetCurrentRootWindow(
+#ifndef NXAGENT_SERVER
+                                            pDev
+#endif                          /* NXAGENT_SERVER */
+                );
+            pCurrentScreen = pRoot ? pRoot->drawable.pScreen : NULL;
+
+            if (pScreen == pCurrentScreen) {
+                GetSpritePosition(
+#ifndef NXAGENT_SERVER
+                                     pDev,
+#endif                          /* NXAGENT_SERVER */
+                                     &x, &y);
+                RRPointerToNearestCrtc(
+#ifndef NXAGENT_SERVER
+                                          pDev,
+#endif                          /* NXAGENT_SERVER */
+                                          pScreen, x, y, NULL);
+#ifndef NXAGENT_SERVER
+            }
+        }
+#endif                          /* NXAGENT_SERVER */
+    }
+}