146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/*
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* Copyright © 2006 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "randrstr.h"
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/*
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* When the pointer moves, check to see if the specified position is outside
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* any of theavailable CRTCs and move it to a 'sensible' place if so, where
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* sensible is the closest monitor to the departing edge.
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*
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* Returns whether the position was adjusted
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*/
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static Bool
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RRCrtcContainsPosition (RRCrtcPtr crtc, int x, int y)
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{
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RRModePtr mode = crtc->mode;
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int scan_width, scan_height;
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if (!mode)
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return FALSE;
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RRCrtcGetScanoutSize (crtc, &scan_width, &scan_height);
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if (crtc->x <= x && x < crtc->x + scan_width &&
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crtc->y <= y && y < crtc->y + scan_height)
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return TRUE;
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return FALSE;
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}
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/*
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* Find the CRTC nearest the specified position, ignoring 'skip'
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*/
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static void
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RRPointerToNearestCrtc (ScreenPtr pScreen, int x, int y, RRCrtcPtr skip)
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{
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rrScrPriv (pScreen);
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int c;
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RRCrtcPtr nearest = NULL;
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int best = 0;
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int best_dx = 0, best_dy = 0;
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for (c = 0; c < pScrPriv->numCrtcs; c++)
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{
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RRCrtcPtr crtc = pScrPriv->crtcs[c];
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RRModePtr mode = crtc->mode;
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int dx, dy;
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int dist;
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int scan_width, scan_height;
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if (!mode)
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continue;
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if (crtc == skip)
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continue;
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RRCrtcGetScanoutSize (crtc, &scan_width, &scan_height);
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if (x < crtc->x)
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dx = crtc->x - x;
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else if (x > crtc->x + scan_width)
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dx = x - (crtc->x + scan_width);
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else
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dx = 0;
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if (y < crtc->y)
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dy = crtc->y - x;
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else if (y > crtc->y + scan_height)
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dy = y - (crtc->y + scan_height);
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else
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dy = 0;
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dist = dx + dy;
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if (!nearest || dist < best)
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{
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nearest = crtc;
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best_dx = dx;
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best_dy = dy;
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}
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}
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if (best_dx || best_dy)
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(*pScreen->SetCursorPosition) (pScreen, x + best_dx, y + best_dy, TRUE);
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pScrPriv->pointerCrtc = nearest;
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}
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void
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RRPointerMoved (ScreenPtr pScreen, int x, int y)
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{
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rrScrPriv (pScreen);
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RRCrtcPtr pointerCrtc = pScrPriv->pointerCrtc;
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int c;
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/* Check last known CRTC */
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if (pointerCrtc && RRCrtcContainsPosition (pointerCrtc, x, y))
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return;
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/* Check all CRTCs */
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for (c = 0; c < pScrPriv->numCrtcs; c++)
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{
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RRCrtcPtr crtc = pScrPriv->crtcs[c];
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if (RRCrtcContainsPosition (crtc, x, y))
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{
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/* Remember containing CRTC */
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pScrPriv->pointerCrtc = crtc;
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return;
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}
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}
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/* None contain pointer, find nearest */
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RRPointerToNearestCrtc (pScreen, x, y, pointerCrtc);
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}
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/*
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* When the screen is reconfigured, move the pointer to the nearest
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* CRTC
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*/
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void
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RRPointerScreenConfigured (ScreenPtr pScreen)
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{
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WindowPtr pRoot = GetCurrentRootWindow ();
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ScreenPtr pCurrentScreen = pRoot ? pRoot->drawable.pScreen : NULL;
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int x, y;
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if (pScreen != pCurrentScreen)
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return;
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GetSpritePosition (&x, &y);
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RRPointerToNearestCrtc (pScreen, x, y, NULL);
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}
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