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comparison src/video/x11/SDL_x11clipboard.c @ 4508:15d2c6f40c48

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Added X11 clipboard support. As far as I know there isn't any real way to tell when the clipboard contents have changed without polling them, so I didn't implement the clipboard update event on X11.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 12 Jul 2010 00:36:55 -0700
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children 8e91c3947210
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4507:dbf3fa541096 4508:15d2c6f40c48
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2010 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #include <limits.h> /* For INT_MAX */
25
26 #include "SDL_events.h"
27 #include "SDL_x11video.h"
28
29
30 /* Get any application owned window handle for clipboard association */
31 static Window
32 GetWindow(_THIS)
33 {
34 SDL_VideoDisplay *display;
35 SDL_Window *window;
36
37 display = _this->displays;
38 if (display) {
39 window = display->windows;
40 if (window) {
41 return ((SDL_WindowData *) window->driverdata)->xwindow;
42 }
43 }
44 return None;
45 }
46
47 int
48 X11_SetClipboardText(_THIS, const char *text)
49 {
50 Display *display = ((SDL_VideoData *) _this->driverdata)->display;
51 Atom format;
52 Window window;
53
54 /* Get the SDL window that will own the selection */
55 window = GetWindow(_this);
56 if (window == None) {
57 SDL_SetError("Couldn't find a window to own the selection");
58 return -1;
59 }
60
61 /* If you don't support UTF-8, you might use XA_STRING here */
62 format = XInternAtom(display, "UTF8_STRING", False);
63 XChangeProperty(display, DefaultRootWindow(display),
64 XA_CUT_BUFFER0, format, 8, PropModeReplace,
65 (const unsigned char *)text, SDL_strlen(text));
66
67 if (XGetSelectionOwner(display, XA_PRIMARY) != window) {
68 XSetSelectionOwner(display, XA_PRIMARY, window, CurrentTime);
69 }
70 return 0;
71 }
72
73 char *
74 X11_GetClipboardText(_THIS)
75 {
76 SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
77 Display *display = videodata->display;
78 Atom format;
79 Window window;
80 Window owner;
81 Atom selection;
82 Atom seln_type;
83 int seln_format;
84 unsigned long nbytes;
85 unsigned long overflow;
86 unsigned char *src;
87 char *text;
88
89 text = NULL;
90
91 /* Get the SDL window that will own the selection */
92 window = GetWindow(_this);
93
94 /* If you don't support UTF-8, you might use XA_STRING here */
95 format = XInternAtom(display, "UTF8_STRING", False);
96
97 owner = XGetSelectionOwner(display, XA_PRIMARY);
98 if ((owner == None) || (owner == window)) {
99 owner = DefaultRootWindow(display);
100 selection = XA_CUT_BUFFER0;
101 } else {
102 /* Request that the selection owner copy the data to our window */
103 owner = window;
104 selection = XInternAtom(display, "SDL_SELECTION", False);
105 XConvertSelection(display, XA_PRIMARY, format, selection, owner,
106 CurrentTime);
107
108 /* FIXME: Should we have a timeout here? */
109 videodata->selection_waiting = SDL_TRUE;
110 while (videodata->selection_waiting) {
111 SDL_PumpEvents();
112 }
113 }
114
115 if (XGetWindowProperty(display, owner, selection, 0, INT_MAX/4, False,
116 format, &seln_type, &seln_format, &nbytes, &overflow, &src)
117 == Success) {
118 if (seln_type == format) {
119 text = (char *)SDL_malloc(nbytes+1);
120 if (text) {
121 SDL_memcpy(text, src, nbytes);
122 text[nbytes] = '\0';
123 }
124 }
125 XFree(src);
126 }
127
128 if (!text) {
129 text = SDL_strdup("");
130 }
131 return text;
132 }
133
134 SDL_bool
135 X11_HasClipboardText(_THIS)
136 {
137 /* Not an easy way to tell with X11, as far as I know... */
138 char *text;
139 SDL_bool retval;
140
141 text = X11_GetClipboardText(_this);
142 if (*text) {
143 retval = SDL_TRUE;
144 } else {
145 retval = SDL_FALSE;
146 }
147 SDL_free(text);
148
149 return retval;
150 }
151
152 /* vi: set ts=4 sw=4 expandtab: */