This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_x11clipboard.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include <limits.h> /* For INT_MAX */
#include "SDL_events.h"
#include "SDL_x11video.h"
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/* If you don't support UTF-8, you might use XA_STRING here */
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#ifdef X_HAVE_UTF8_STRING
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#define TEXT_FORMAT XInternAtom(display, "UTF8_STRING", False)
#else
#define TEXT_FORMAT XA_STRING
#endif
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/* Get any application owned window handle for clipboard association */
static Window
GetWindow(_THIS)
{
SDL_VideoDisplay *display;
SDL_Window *window;
display = _this->displays;
if (display) {
window = display->windows;
if (window) {
return ((SDL_WindowData *) window->driverdata)->xwindow;
}
}
return None;
}
int
X11_SetClipboardText(_THIS, const char *text)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
Atom format;
Window window;
/* Get the SDL window that will own the selection */
window = GetWindow(_this);
if (window == None) {
SDL_SetError("Couldn't find a window to own the selection");
return -1;
}
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/* Save the selection on the root window */
format = TEXT_FORMAT;
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XChangeProperty(display, DefaultRootWindow(display),
XA_CUT_BUFFER0, format, 8, PropModeReplace,
(const unsigned char *)text, SDL_strlen(text));
if (XGetSelectionOwner(display, XA_PRIMARY) != window) {
XSetSelectionOwner(display, XA_PRIMARY, window, CurrentTime);
}
return 0;
}
char *
X11_GetClipboardText(_THIS)
{
SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
Display *display = videodata->display;
Atom format;
Window window;
Window owner;
Atom selection;
Atom seln_type;
int seln_format;
unsigned long nbytes;
unsigned long overflow;
unsigned char *src;
char *text;
text = NULL;
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/* Get the window that holds the selection */
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window = GetWindow(_this);
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format = TEXT_FORMAT;
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owner = XGetSelectionOwner(display, XA_PRIMARY);
if ((owner == None) || (owner == window)) {
owner = DefaultRootWindow(display);
selection = XA_CUT_BUFFER0;
} else {
/* Request that the selection owner copy the data to our window */
owner = window;
selection = XInternAtom(display, "SDL_SELECTION", False);
XConvertSelection(display, XA_PRIMARY, format, selection, owner,
CurrentTime);
/* FIXME: Should we have a timeout here? */
videodata->selection_waiting = SDL_TRUE;
while (videodata->selection_waiting) {
SDL_PumpEvents();
}
}
if (XGetWindowProperty(display, owner, selection, 0, INT_MAX/4, False,
format, &seln_type, &seln_format, &nbytes, &overflow, &src)
== Success) {
if (seln_type == format) {
text = (char *)SDL_malloc(nbytes+1);
if (text) {
SDL_memcpy(text, src, nbytes);
text[nbytes] = '\0';
}
}
XFree(src);
}
if (!text) {
text = SDL_strdup("");
}
return text;
}
SDL_bool
X11_HasClipboardText(_THIS)
{
/* Not an easy way to tell with X11, as far as I know... */
char *text;
SDL_bool retval;
text = X11_GetClipboardText(_this);
if (*text) {
retval = SDL_TRUE;
} else {
retval = SDL_FALSE;
}
SDL_free(text);
return retval;
}
/* vi: set ts=4 sw=4 expandtab: */