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a09e091a JB |
1 | /* |
2 | * Copyright © 2006 Keith Packard | |
3 | * | |
4 | * Permission to use, copy, modify, distribute, and sell this software and its | |
5 | * documentation for any purpose is hereby granted without fee, provided that | |
6 | * the above copyright notice appear in all copies and that both that copyright | |
7 | * notice and this permission notice appear in supporting documentation, and | |
8 | * that the name of the copyright holders not be used in advertising or | |
9 | * publicity pertaining to distribution of the software without specific, | |
10 | * written prior permission. The copyright holders make no representations | |
11 | * about the suitability of this software for any purpose. It is provided "as | |
12 | * is" without express or implied warranty. | |
13 | * | |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
20 | * OF THIS SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include "randrstr.h" | |
24 | #include "inputstr.h" | |
25 | ||
26 | /* | |
27 | * When the pointer moves, check to see if the specified position is outside | |
28 | * any of theavailable CRTCs and move it to a 'sensible' place if so, where | |
29 | * sensible is the closest monitor to the departing edge. | |
30 | * | |
31 | * Returns whether the position was adjusted | |
32 | */ | |
33 | ||
34 | static Bool | |
35 | RRCrtcContainsPosition(RRCrtcPtr crtc, int x, int y) | |
36 | { | |
37 | RRModePtr mode = crtc->mode; | |
38 | int scan_width, scan_height; | |
39 | ||
40 | if (!mode) | |
41 | return FALSE; | |
42 | ||
43 | RRCrtcGetScanoutSize(crtc, &scan_width, &scan_height); | |
44 | ||
45 | if (crtc->x <= x && x < crtc->x + scan_width && | |
46 | crtc->y <= y && y < crtc->y + scan_height) | |
47 | return TRUE; | |
48 | return FALSE; | |
49 | } | |
50 | ||
51 | /* | |
52 | * Find the CRTC nearest the specified position, ignoring 'skip' | |
53 | */ | |
54 | static void | |
55 | RRPointerToNearestCrtc(DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y, | |
56 | RRCrtcPtr skip) | |
57 | { | |
58 | rrScrPriv(pScreen); | |
59 | int c; | |
60 | RRCrtcPtr nearest = NULL; | |
61 | int best = 0; | |
62 | int best_dx = 0, best_dy = 0; | |
63 | ||
64 | for (c = 0; c < pScrPriv->numCrtcs; c++) { | |
65 | RRCrtcPtr crtc = pScrPriv->crtcs[c]; | |
66 | RRModePtr mode = crtc->mode; | |
67 | int dx, dy; | |
68 | int dist; | |
69 | int scan_width, scan_height; | |
70 | ||
71 | if (!mode) | |
72 | continue; | |
73 | if (crtc == skip) | |
74 | continue; | |
75 | ||
76 | RRCrtcGetScanoutSize(crtc, &scan_width, &scan_height); | |
77 | ||
78 | if (x < crtc->x) | |
79 | dx = crtc->x - x; | |
80 | else if (x > crtc->x + scan_width) | |
81 | dx = x - (crtc->x + scan_width); | |
82 | else | |
83 | dx = 0; | |
84 | if (y < crtc->y) | |
85 | dy = crtc->y - y; | |
86 | else if (y > crtc->y + scan_height) | |
87 | dy = y - (crtc->y + scan_height); | |
88 | else | |
89 | dy = 0; | |
90 | dist = dx + dy; | |
91 | if (!nearest || dist < best) { | |
92 | nearest = crtc; | |
93 | best_dx = dx; | |
94 | best_dy = dy; | |
95 | } | |
96 | } | |
97 | if (best_dx || best_dy) | |
98 | (*pScreen->SetCursorPosition) (pDev, pScreen, x + best_dx, y + best_dy, | |
99 | TRUE); | |
100 | pScrPriv->pointerCrtc = nearest; | |
101 | } | |
102 | ||
103 | void | |
104 | RRPointerMoved(ScreenPtr pScreen, int x, int y) | |
105 | { | |
106 | rrScrPriv(pScreen); | |
107 | RRCrtcPtr pointerCrtc = pScrPriv->pointerCrtc; | |
108 | int c; | |
109 | ||
110 | /* Check last known CRTC */ | |
111 | if (pointerCrtc && RRCrtcContainsPosition(pointerCrtc, x, y)) | |
112 | return; | |
113 | ||
114 | /* Check all CRTCs */ | |
115 | for (c = 0; c < pScrPriv->numCrtcs; c++) { | |
116 | RRCrtcPtr crtc = pScrPriv->crtcs[c]; | |
117 | ||
118 | if (RRCrtcContainsPosition(crtc, x, y)) { | |
119 | /* Remember containing CRTC */ | |
120 | pScrPriv->pointerCrtc = crtc; | |
121 | return; | |
122 | } | |
123 | } | |
124 | ||
125 | /* None contain pointer, find nearest */ | |
126 | ErrorF("RRPointerMoved: Untested, may cause \"bogus pointer event\"\n"); | |
127 | RRPointerToNearestCrtc(inputInfo.pointer, pScreen, x, y, pointerCrtc); | |
128 | } | |
129 | ||
130 | /* | |
131 | * When the screen is reconfigured, move all pointers to the nearest | |
132 | * CRTC | |
133 | */ | |
134 | void | |
135 | RRPointerScreenConfigured(ScreenPtr pScreen) | |
136 | { | |
137 | WindowPtr pRoot; | |
138 | ScreenPtr pCurrentScreen; | |
139 | int x, y; | |
140 | DeviceIntPtr pDev; | |
141 | ||
142 | for (pDev = inputInfo.devices; pDev; pDev = pDev->next) { | |
143 | if (IsPointerDevice(pDev)) { | |
144 | pRoot = GetCurrentRootWindow(pDev); | |
145 | pCurrentScreen = pRoot ? pRoot->drawable.pScreen : NULL; | |
146 | ||
147 | if (pScreen == pCurrentScreen) { | |
148 | GetSpritePosition(pDev, &x, &y); | |
149 | RRPointerToNearestCrtc(pDev, pScreen, x, y, NULL); | |
150 | } | |
151 | } | |
152 | } | |
153 | } |