Merge branch 'nx-X11'

1 files changed, 145 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..c88a0f83e
--- /dev/null
+++ b/nx-X11/programs/Xserver/randr/rrpointer.c
@@ -0,0 +1,145 @@
+/*
+ * 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"
+
+/*
+ * 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 (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)
+	    dx = x - (crtc->x + scan_width);
+	else
+	    dx = 0;
+	if (y < crtc->y)
+	    dy = crtc->y - x;
+	else if (y > crtc->y + scan_height)
+	    dy = y - (crtc->y + scan_height);
+	else
+	    dy = 0;
+	dist = dx + dy;
+	if (!nearest || dist < best)
+	{
+	    nearest = crtc;
+	    best_dx = dx;
+	    best_dy = dy;
+	}
+    }
+    if (best_dx || best_dy)
+	(*pScreen->SetCursorPosition) (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 */
+    RRPointerToNearestCrtc (pScreen, x, y, pointerCrtc);
+}
+
+/*
+ * When the screen is reconfigured, move the pointer to the nearest
+ * CRTC
+ */
+void
+RRPointerScreenConfigured (ScreenPtr pScreen)
+{
+    WindowPtr	pRoot = GetCurrentRootWindow ();
+    ScreenPtr	pCurrentScreen = pRoot ? pRoot->drawable.pScreen : NULL;
+    int		x, y;
+
+    if (pScreen != pCurrentScreen)
+	return;
+    GetSpritePosition (&x, &y);
+    RRPointerToNearestCrtc (pScreen, x, y, NULL);
+}