1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
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);
}
|
