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glfw/src/x11_window.c
Camilla Berglund 527952102a Fixed filtering of events duplicated by XIM. 
Duplicate events cannot be filtered by the return value of XFilterEvent,
as that discards dead key events on some IMs (ibus), nor by its inverse,
as that discards all key events on other IMs (?).  This solution is
based on the workaround in SDL2 and takes advantage of the identical
time of the duplicate events.

Fixes #548.
Closes #554.
Closes #571.
2015-08-07 16:53:43 +02:00

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//========================================================================
// GLFW 3.1 X11 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#include "internal.h"
#include <X11/cursorfont.h>
#include <X11/Xmd.h>
#include <sys/select.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
// Action for EWMH client messages
#define _NET_WM_STATE_REMOVE 0
#define _NET_WM_STATE_ADD 1
#define _NET_WM_STATE_TOGGLE 2
// Additional mouse button names for XButtonEvent
#define Button6 6
#define Button7 7
typedef struct
{
unsigned long flags;
unsigned long functions;
unsigned long decorations;
long input_mode;
unsigned long status;
} MotifWmHints;
#define MWM_HINTS_DECORATIONS (1L << 1)
// Wait for data to arrive
//
void selectDisplayConnection(struct timeval* timeout)
{
fd_set fds;
const int fd = ConnectionNumber(_glfw.x11.display);
FD_ZERO(&fds);
FD_SET(fd, &fds);
// select(1) is used instead of an X function like XNextEvent, as the
// wait inside those are guarded by the mutex protecting the display
// struct, locking out other threads from using X (including GLX)
select(fd + 1, &fds, NULL, NULL, timeout);
}
// Returns whether the window is iconified
//
static int getWindowState(_GLFWwindow* window)
{
int result = WithdrawnState;
struct {
CARD32 state;
Window icon;
} *state = NULL;
if (_glfwGetWindowProperty(window->x11.handle,
_glfw.x11.WM_STATE,
_glfw.x11.WM_STATE,
(unsigned char**) &state) >= 2)
{
result = state->state;
}
XFree(state);
return result;
}
// Returns whether the event is a selection event
//
static Bool isFrameExtentsEvent(Display* display, XEvent* event, XPointer pointer)
{
_GLFWwindow* window = (_GLFWwindow*) pointer;
return event->type == PropertyNotify &&
event->xproperty.state == PropertyNewValue &&
event->xproperty.window == window->x11.handle &&
event->xproperty.atom == _glfw.x11.NET_FRAME_EXTENTS;
}
// Translates a GLFW standard cursor to a font cursor shape
//
static int translateCursorShape(int shape)
{
switch (shape)
{
case GLFW_ARROW_CURSOR:
return XC_left_ptr;
case GLFW_IBEAM_CURSOR:
return XC_xterm;
case GLFW_CROSSHAIR_CURSOR:
return XC_crosshair;
case GLFW_HAND_CURSOR:
return XC_hand1;
case GLFW_HRESIZE_CURSOR:
return XC_sb_h_double_arrow;
case GLFW_VRESIZE_CURSOR:
return XC_sb_v_double_arrow;
}
return 0;
}
// Translates an X event modifier state mask
//
static int translateState(int state)
{
int mods = 0;
if (state & ShiftMask)
mods |= GLFW_MOD_SHIFT;
if (state & ControlMask)
mods |= GLFW_MOD_CONTROL;
if (state & Mod1Mask)
mods |= GLFW_MOD_ALT;
if (state & Mod4Mask)
mods |= GLFW_MOD_SUPER;
return mods;
}
// Translates an X Window key to internal coding
//
static int translateKey(int scancode)
{
// Use the pre-filled LUT (see createKeyTables() in x11_init.c)
if (scancode < 0 || scancode > 255)
return GLFW_KEY_UNKNOWN;
return _glfw.x11.publicKeys[scancode];
}
// Return the GLFW window corresponding to the specified X11 window
//
static _GLFWwindow* findWindowByHandle(Window handle)
{
_GLFWwindow* window;
if (XFindContext(_glfw.x11.display,
handle,
_glfw.x11.context,
(XPointer*) &window) != 0)
{
return NULL;
}
return window;
}
// Sends an EWMH or ICCCM event to the window manager
//
static void sendEventToWM(_GLFWwindow* window, Atom type,
long a, long b, long c, long d, long e)
{
XEvent event;
memset(&event, 0, sizeof(event));
event.type = ClientMessage;
event.xclient.window = window->x11.handle;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = type;
event.xclient.data.l[0] = a;
event.xclient.data.l[1] = b;
event.xclient.data.l[2] = c;
event.xclient.data.l[3] = d;
event.xclient.data.l[4] = e;
XSendEvent(_glfw.x11.display, _glfw.x11.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
// Splits and translates a text/uri-list into separate file paths
// NOTE: This function destroys the provided string
//
static char** parseUriList(char* text, int* count)
{
const char* prefix = "file://";
char** paths = NULL;
char* line;
*count = 0;
while ((line = strtok(text, "\r\n")))
{
text = NULL;
if (line[0] == '#')
continue;
if (strncmp(line, prefix, strlen(prefix)) == 0)
line += strlen(prefix);
(*count)++;
char* path = calloc(strlen(line) + 1, 1);
paths = realloc(paths, *count * sizeof(char*));
paths[*count - 1] = path;
while (*line)
{
if (line[0] == '%' && line[1] && line[2])
{
const char digits[3] = { line[1], line[2], '\0' };
*path = strtol(digits, NULL, 16);
line += 2;
}
else
*path = *line;
path++;
line++;
}
}
return paths;
}
// Create the X11 window (and its colormap)
//
static GLboolean createWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig)
{
unsigned long wamask;
XSetWindowAttributes wa;
XVisualInfo* vi = _GLFW_X11_CONTEXT_VISUAL;
// Every window needs a colormap
// Create one based on the visual used by the current context
// TODO: Decouple this from context creation
window->x11.colormap = XCreateColormap(_glfw.x11.display,
_glfw.x11.root,
vi->visual,
AllocNone);
// Create the actual window
{
wamask = CWBorderPixel | CWColormap | CWEventMask;
wa.colormap = window->x11.colormap;
wa.border_pixel = 0;
wa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask |
PointerMotionMask | ButtonPressMask | ButtonReleaseMask |
ExposureMask | FocusChangeMask | VisibilityChangeMask |
EnterWindowMask | LeaveWindowMask | PropertyChangeMask;
_glfwGrabXErrorHandler();
window->x11.handle = XCreateWindow(_glfw.x11.display,
_glfw.x11.root,
0, 0,
wndconfig->width, wndconfig->height,
0, // Border width
vi->depth, // Color depth
InputOutput,
vi->visual,
wamask,
&wa);
_glfwReleaseXErrorHandler();
if (!window->x11.handle)
{
_glfwInputXError(GLFW_PLATFORM_ERROR,
"X11: Failed to create window");
return GL_FALSE;
}
if (!wndconfig->decorated)
{
MotifWmHints hints;
hints.flags = MWM_HINTS_DECORATIONS;
hints.decorations = 0;
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.MOTIF_WM_HINTS,
_glfw.x11.MOTIF_WM_HINTS, 32,
PropModeReplace,
(unsigned char*) &hints,
sizeof(MotifWmHints) / sizeof(long));
}
XSaveContext(_glfw.x11.display,
window->x11.handle,
_glfw.x11.context,
(XPointer) window);
}
if (wndconfig->monitor)
{
if (!_glfw.x11.NET_WM_STATE || !_glfw.x11.NET_WM_STATE_FULLSCREEN)
{
// This is the butcher's way of removing window decorations
// Setting the override-redirect attribute on a window makes the
// window manager ignore the window completely (ICCCM, section 4)
// The good thing is that this makes undecorated full screen windows
// easy to do; the bad thing is that we have to do everything
// manually and some things (like iconify/restore) won't work at
// all, as those are tasks usually performed by the window manager
XSetWindowAttributes attributes;
attributes.override_redirect = True;
XChangeWindowAttributes(_glfw.x11.display,
window->x11.handle,
CWOverrideRedirect,
&attributes);
}
}
else
{
if (wndconfig->floating)
{
if (_glfw.x11.NET_WM_STATE && _glfw.x11.NET_WM_STATE_ABOVE)
{
sendEventToWM(window,
_glfw.x11.NET_WM_STATE,
_NET_WM_STATE_ADD,
_glfw.x11.NET_WM_STATE_ABOVE,
0, 1, 0);
}
}
}
// Declare the WM protocols supported by GLFW
{
int count = 0;
Atom protocols[2];
// The WM_DELETE_WINDOW ICCCM protocol
// Basic window close notification protocol
if (_glfw.x11.WM_DELETE_WINDOW)
protocols[count++] = _glfw.x11.WM_DELETE_WINDOW;
// The _NET_WM_PING EWMH protocol
// Tells the WM to ping the GLFW window and flag the application as
// unresponsive if the WM doesn't get a reply within a few seconds
if (_glfw.x11.NET_WM_PING)
protocols[count++] = _glfw.x11.NET_WM_PING;
if (count > 0)
{
XSetWMProtocols(_glfw.x11.display, window->x11.handle,
protocols, count);
}
}
if (_glfw.x11.NET_WM_PID)
{
const pid_t pid = getpid();
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.NET_WM_PID, XA_CARDINAL, 32,
PropModeReplace,
(unsigned char*) &pid, 1);
}
// Set ICCCM WM_HINTS property
{
XWMHints* hints = XAllocWMHints();
if (!hints)
{
_glfwInputError(GLFW_OUT_OF_MEMORY,
"X11: Failed to allocate WM hints");
return GL_FALSE;
}
hints->flags = StateHint;
hints->initial_state = NormalState;
XSetWMHints(_glfw.x11.display, window->x11.handle, hints);
XFree(hints);
}
// Set ICCCM WM_NORMAL_HINTS property (even if no parts are set)
{
XSizeHints* hints = XAllocSizeHints();
hints->flags = 0;
if (wndconfig->monitor)
{
hints->flags |= PPosition;
_glfwPlatformGetMonitorPos(wndconfig->monitor, &hints->x, &hints->y);
}
else
{
// HACK: Explicitly setting PPosition to any value causes some WMs,
// notably Compiz and Metacity, to honor the position of
// unmapped windows set by XMoveWindow
hints->flags |= PPosition;
hints->x = hints->y = 0;
}
if (!wndconfig->resizable)
{
hints->flags |= (PMinSize | PMaxSize);
hints->min_width = hints->max_width = wndconfig->width;
hints->min_height = hints->max_height = wndconfig->height;
}
XSetWMNormalHints(_glfw.x11.display, window->x11.handle, hints);
XFree(hints);
}
// Set ICCCM WM_CLASS property
// HACK: Until a mechanism for specifying the application name is added, the
// initial window title is used as the window class name
if (strlen(wndconfig->title))
{
XClassHint* hint = XAllocClassHint();
hint->res_name = (char*) wndconfig->title;
hint->res_class = (char*) wndconfig->title;
XSetClassHint(_glfw.x11.display, window->x11.handle, hint);
XFree(hint);
}
#if defined(_GLFW_HAS_XINPUT)
if (_glfw.x11.xi.available)
{
// Select for XInput2 events
XIEventMask eventmask;
unsigned char mask[] = { 0 };
eventmask.deviceid = 2;
eventmask.mask_len = sizeof(mask);
eventmask.mask = mask;
XISetMask(mask, XI_Motion);
XISelectEvents(_glfw.x11.display, window->x11.handle, &eventmask, 1);
}
#endif /*_GLFW_HAS_XINPUT*/
if (_glfw.x11.XdndAware)
{
// Announce support for Xdnd (drag and drop)
const Atom version = 5;
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.XdndAware, XA_ATOM, 32,
PropModeReplace, (unsigned char*) &version, 1);
}
_glfwPlatformSetWindowTitle(window, wndconfig->title);
XRRSelectInput(_glfw.x11.display, window->x11.handle,
RRScreenChangeNotifyMask);
if (_glfw.x11.im)
{
window->x11.ic = XCreateIC(_glfw.x11.im,
XNInputStyle,
XIMPreeditNothing | XIMStatusNothing,
XNClientWindow,
window->x11.handle,
XNFocusWindow,
window->x11.handle,
NULL);
}
_glfwPlatformGetWindowPos(window, &window->x11.xpos, &window->x11.ypos);
_glfwPlatformGetWindowSize(window, &window->x11.width, &window->x11.height);
return GL_TRUE;
}
// Hide the mouse cursor
//
static void hideCursor(_GLFWwindow* window)
{
XUngrabPointer(_glfw.x11.display, CurrentTime);
XDefineCursor(_glfw.x11.display, window->x11.handle, _glfw.x11.cursor);
}
// Disable the mouse cursor
//
static void disableCursor(_GLFWwindow* window)
{
XGrabPointer(_glfw.x11.display, window->x11.handle, True,
ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
GrabModeAsync, GrabModeAsync,
window->x11.handle, _glfw.x11.cursor, CurrentTime);
}
// Restores the mouse cursor
//
static void restoreCursor(_GLFWwindow* window)
{
XUngrabPointer(_glfw.x11.display, CurrentTime);
if (window->cursor)
{
XDefineCursor(_glfw.x11.display, window->x11.handle,
window->cursor->x11.handle);
}
else
XUndefineCursor(_glfw.x11.display, window->x11.handle);
}
// Returns whether the event is a selection event
//
static Bool isSelectionEvent(Display* display, XEvent* event, XPointer pointer)
{
return event->type == SelectionRequest ||
event->type == SelectionNotify ||
event->type == SelectionClear;
}
// Set the specified property to the selection converted to the requested target
//
static Atom writeTargetToProperty(const XSelectionRequestEvent* request)
{
int i;
const Atom formats[] = { _glfw.x11.UTF8_STRING,
_glfw.x11.COMPOUND_STRING,
XA_STRING };
const int formatCount = sizeof(formats) / sizeof(formats[0]);
if (request->property == None)
{
// The requester is a legacy client (ICCCM section 2.2)
// We don't support legacy clients, so fail here
return None;
}
if (request->target == _glfw.x11.TARGETS)
{
// The list of supported targets was requested
const Atom targets[] = { _glfw.x11.TARGETS,
_glfw.x11.MULTIPLE,
_glfw.x11.UTF8_STRING,
_glfw.x11.COMPOUND_STRING,
XA_STRING };
XChangeProperty(_glfw.x11.display,
request->requestor,
request->property,
XA_ATOM,
32,
PropModeReplace,
(unsigned char*) targets,
sizeof(targets) / sizeof(targets[0]));
return request->property;
}
if (request->target == _glfw.x11.MULTIPLE)
{
// Multiple conversions were requested
Atom* targets;
unsigned long i, count;
count = _glfwGetWindowProperty(request->requestor,
request->property,
_glfw.x11.ATOM_PAIR,
(unsigned char**) &targets);
for (i = 0; i < count; i += 2)
{
int j;
for (j = 0; j < formatCount; j++)
{
if (targets[i] == formats[j])
break;
}
if (j < formatCount)
{
XChangeProperty(_glfw.x11.display,
request->requestor,
targets[i + 1],
targets[i],
8,
PropModeReplace,
(unsigned char*) _glfw.x11.clipboardString,
strlen(_glfw.x11.clipboardString));
}
else
targets[i + 1] = None;
}
XChangeProperty(_glfw.x11.display,
request->requestor,
request->property,
_glfw.x11.ATOM_PAIR,
32,
PropModeReplace,
(unsigned char*) targets,
count);
XFree(targets);
return request->property;
}
if (request->target == _glfw.x11.SAVE_TARGETS)
{
// The request is a check whether we support SAVE_TARGETS
// It should be handled as a no-op side effect target
XChangeProperty(_glfw.x11.display,
request->requestor,
request->property,
_glfw.x11.NULL_,
32,
PropModeReplace,
NULL,
0);
return request->property;
}
// Conversion to a data target was requested
for (i = 0; i < formatCount; i++)
{
if (request->target == formats[i])
{
// The requested target is one we support
XChangeProperty(_glfw.x11.display,
request->requestor,
request->property,
request->target,
8,
PropModeReplace,
(unsigned char*) _glfw.x11.clipboardString,
strlen(_glfw.x11.clipboardString));
return request->property;
}
}
// The requested target is not supported
return None;
}
static void handleSelectionClear(XEvent* event)
{
free(_glfw.x11.clipboardString);
_glfw.x11.clipboardString = NULL;
}
static void handleSelectionRequest(XEvent* event)
{
const XSelectionRequestEvent* request = &event->xselectionrequest;
XEvent reply;
memset(&reply, 0, sizeof(reply));
reply.xselection.property = writeTargetToProperty(request);
reply.xselection.type = SelectionNotify;
reply.xselection.display = request->display;
reply.xselection.requestor = request->requestor;
reply.xselection.selection = request->selection;
reply.xselection.target = request->target;
reply.xselection.time = request->time;
XSendEvent(_glfw.x11.display, request->requestor, False, 0, &reply);
}
static void pushSelectionToManager(_GLFWwindow* window)
{
XConvertSelection(_glfw.x11.display,
_glfw.x11.CLIPBOARD_MANAGER,
_glfw.x11.SAVE_TARGETS,
None,
window->x11.handle,
CurrentTime);
for (;;)
{
XEvent event;
while (XCheckIfEvent(_glfw.x11.display, &event, isSelectionEvent, NULL))
{
switch (event.type)
{
case SelectionRequest:
handleSelectionRequest(&event);
break;
case SelectionClear:
handleSelectionClear(&event);
break;
case SelectionNotify:
{
if (event.xselection.target == _glfw.x11.SAVE_TARGETS)
{
// This means one of two things; either the selection was
// not owned, which means there is no clipboard manager, or
// the transfer to the clipboard manager has completed
// In either case, it means we are done here
return;
}
break;
}
}
}
selectDisplayConnection(NULL);
}
}
// Enter full screen mode
//
static void enterFullscreenMode(_GLFWwindow* window)
{
if (_glfw.x11.saver.count == 0)
{
// Remember old screen saver settings
XGetScreenSaver(_glfw.x11.display,
&_glfw.x11.saver.timeout,
&_glfw.x11.saver.interval,
&_glfw.x11.saver.blanking,
&_glfw.x11.saver.exposure);
// Disable screen saver
XSetScreenSaver(_glfw.x11.display, 0, 0, DontPreferBlanking,
DefaultExposures);
}
_glfw.x11.saver.count++;
_glfwSetVideoMode(window->monitor, &window->videoMode);
if (_glfw.x11.NET_WM_BYPASS_COMPOSITOR)
{
const unsigned long value = 1;
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.NET_WM_BYPASS_COMPOSITOR, XA_CARDINAL, 32,
PropModeReplace, (unsigned char*) &value, 1);
}
// Position the window over its monitor
{
int xpos, ypos;
GLFWvidmode mode;
_glfwPlatformGetMonitorPos(window->monitor, &xpos, &ypos);
_glfwPlatformGetVideoMode(window->monitor, &mode);
XMoveResizeWindow(_glfw.x11.display, window->x11.handle,
xpos, ypos, mode.width, mode.height);
}
if (_glfw.x11.xinerama.available && _glfw.x11.NET_WM_FULLSCREEN_MONITORS)
{
sendEventToWM(window,
_glfw.x11.NET_WM_FULLSCREEN_MONITORS,
window->monitor->x11.index,
window->monitor->x11.index,
window->monitor->x11.index,
window->monitor->x11.index,
0);
}
if (_glfw.x11.NET_ACTIVE_WINDOW)
{
// Ask the window manager to raise and focus the GLFW window
// Only focused windows with the _NET_WM_STATE_FULLSCREEN state end up
// on top of all other windows ("Stacking order" in EWMH spec)
sendEventToWM(window, _glfw.x11.NET_ACTIVE_WINDOW, 1, 0, 0, 0, 0);
}
else
{
XRaiseWindow(_glfw.x11.display, window->x11.handle);
XSetInputFocus(_glfw.x11.display, window->x11.handle,
RevertToParent, CurrentTime);
}
if (_glfw.x11.NET_WM_STATE && _glfw.x11.NET_WM_STATE_FULLSCREEN)
{
// Ask the window manager to make the GLFW window a full screen window
// Full screen windows are undecorated and, when focused, are kept
// on top of all other windows
sendEventToWM(window,
_glfw.x11.NET_WM_STATE,
_NET_WM_STATE_ADD,
_glfw.x11.NET_WM_STATE_FULLSCREEN,
0, 1, 0);
}
}
// Leave full screen mode
//
static void leaveFullscreenMode(_GLFWwindow* window)
{
_glfwRestoreVideoMode(window->monitor);
_glfw.x11.saver.count--;
if (_glfw.x11.saver.count == 0)
{
// Restore old screen saver settings
XSetScreenSaver(_glfw.x11.display,
_glfw.x11.saver.timeout,
_glfw.x11.saver.interval,
_glfw.x11.saver.blanking,
_glfw.x11.saver.exposure);
}
}
// Process the specified X event
//
static void processEvent(XEvent *event)
{
_GLFWwindow* window = NULL;
int keycode = 0;
Bool filtered = False;
// HACK: Save scancode as some IMs clear the field in XFilterEvent
if (event->type == KeyPress || event->type == KeyRelease)
keycode = event->xkey.keycode;
if (_glfw.x11.im)
filtered = XFilterEvent(event, None);
if (event->type != GenericEvent)
{
window = findWindowByHandle(event->xany.window);
if (window == NULL)
{
// This is an event for a window that has already been destroyed
return;
}
}
switch (event->type)
{
case KeyPress:
{
const int key = translateKey(keycode);
const int mods = translateState(event->xkey.state);
const int plain = !(mods & (GLFW_MOD_CONTROL | GLFW_MOD_ALT));
if (window->x11.ic)
{
// HACK: Ignore duplicate key press events generated by ibus
// Corresponding release events are filtered out by the
// GLFW key repeat logic
if (window->x11.last.keycode != keycode ||
window->x11.last.time != event->xkey.time)
{
if (keycode)
_glfwInputKey(window, key, keycode, GLFW_PRESS, mods);
}
window->x11.last.keycode = keycode;
window->x11.last.time = event->xkey.time;
if (!filtered)
{
int i;
Status status;
wchar_t buffer[16];
const int count = XwcLookupString(window->x11.ic,
&event->xkey,
buffer, sizeof(buffer),
NULL, &status);
for (i = 0; i < count; i++)
_glfwInputChar(window, buffer[i], mods, plain);
}
}
else
{
KeySym keysym;
XLookupString(&event->xkey, NULL, 0, &keysym, NULL);
_glfwInputKey(window, key, keycode, GLFW_PRESS, mods);
const long character = _glfwKeySym2Unicode(keysym);
if (character != -1)
_glfwInputChar(window, character, mods, plain);
}
return;
}
case KeyRelease:
{
const int key = translateKey(keycode);
const int mods = translateState(event->xkey.state);
if (!_glfw.x11.xkb.detectable)
{
// HACK: Key repeat events will arrive as KeyRelease/KeyPress
// pairs with similar or identical time stamps
// The key repeat logic in _glfwInputKey expects only key
// presses to repeat, so detect and discard release events
if (XEventsQueued(_glfw.x11.display, QueuedAfterReading))
{
XEvent next;
XPeekEvent(_glfw.x11.display, &next);
if (next.type == KeyPress &&
next.xkey.window == event->xkey.window &&
next.xkey.keycode == keycode)
{
// HACK: Repeat events sometimes leak through due to
// some sort of time drift, so add an epsilon
// Toshiyuki Takahashi can press a button 16 times
// per second so it's fairly safe to assume that
// no human is pressing the key 50 times per
// second (value is ms)
if ((next.xkey.time - event->xkey.time) < 20)
{
// This is very likely a server-generated key repeat
// event, so ignore it
return;
}
}
}
}
_glfwInputKey(window, key, keycode, GLFW_RELEASE, mods);
return;
}
case ButtonPress:
{
const int mods = translateState(event->xbutton.state);
if (event->xbutton.button == Button1)
_glfwInputMouseClick(window, GLFW_MOUSE_BUTTON_LEFT, GLFW_PRESS, mods);
else if (event->xbutton.button == Button2)
_glfwInputMouseClick(window, GLFW_MOUSE_BUTTON_MIDDLE, GLFW_PRESS, mods);
else if (event->xbutton.button == Button3)
_glfwInputMouseClick(window, GLFW_MOUSE_BUTTON_RIGHT, GLFW_PRESS, mods);
// Modern X provides scroll events as mouse button presses
else if (event->xbutton.button == Button4)
_glfwInputScroll(window, 0.0, 1.0);
else if (event->xbutton.button == Button5)
_glfwInputScroll(window, 0.0, -1.0);
else if (event->xbutton.button == Button6)
_glfwInputScroll(window, 1.0, 0.0);
else if (event->xbutton.button == Button7)
_glfwInputScroll(window, -1.0, 0.0);
else
{
// Additional buttons after 7 are treated as regular buttons
// We subtract 4 to fill the gap left by scroll input above
_glfwInputMouseClick(window,
event->xbutton.button - Button1 - 4,
GLFW_PRESS,
mods);
}
return;
}
case ButtonRelease:
{
const int mods = translateState(event->xbutton.state);
if (event->xbutton.button == Button1)
{
_glfwInputMouseClick(window,
GLFW_MOUSE_BUTTON_LEFT,
GLFW_RELEASE,
mods);
}
else if (event->xbutton.button == Button2)
{
_glfwInputMouseClick(window,
GLFW_MOUSE_BUTTON_MIDDLE,
GLFW_RELEASE,
mods);
}
else if (event->xbutton.button == Button3)
{
_glfwInputMouseClick(window,
GLFW_MOUSE_BUTTON_RIGHT,
GLFW_RELEASE,
mods);
}
else if (event->xbutton.button > Button7)
{
// Additional buttons after 7 are treated as regular buttons
// We subtract 4 to fill the gap left by scroll input above
_glfwInputMouseClick(window,
event->xbutton.button - Button1 - 4,
GLFW_RELEASE,
mods);
}
return;
}
case EnterNotify:
{
// HACK: This is a workaround for WMs (KWM, Fluxbox) that otherwise
// ignore the defined cursor for hidden cursor mode
if (window->cursorMode == GLFW_CURSOR_HIDDEN)
hideCursor(window);
_glfwInputCursorEnter(window, GL_TRUE);
return;
}
case LeaveNotify:
{
_glfwInputCursorEnter(window, GL_FALSE);
return;
}
case MotionNotify:
{
const int x = event->xmotion.x;
const int y = event->xmotion.y;
if (x != window->x11.warpPosX || y != window->x11.warpPosY)
{
// The cursor was moved by something other than GLFW
if (window->cursorMode == GLFW_CURSOR_DISABLED)
{
if (_glfw.cursorWindow != window)
return;
_glfwInputCursorMotion(window,
x - window->x11.cursorPosX,
y - window->x11.cursorPosY);
}
else
_glfwInputCursorMotion(window, x, y);
}
window->x11.cursorPosX = x;
window->x11.cursorPosY = y;
return;
}
case ConfigureNotify:
{
if (event->xconfigure.width != window->x11.width ||
event->xconfigure.height != window->x11.height)
{
_glfwInputFramebufferSize(window,
event->xconfigure.width,
event->xconfigure.height);
_glfwInputWindowSize(window,
event->xconfigure.width,
event->xconfigure.height);
window->x11.width = event->xconfigure.width;
window->x11.height = event->xconfigure.height;
}
if (event->xconfigure.x != window->x11.xpos ||
event->xconfigure.y != window->x11.ypos)
{
_glfwInputWindowPos(window,
event->xconfigure.x,
event->xconfigure.y);
window->x11.xpos = event->xconfigure.x;
window->x11.ypos = event->xconfigure.y;
}
return;
}
case ClientMessage:
{
// Custom client message, probably from the window manager
if (filtered)
return;
if (event->xclient.message_type == None)
return;
if (event->xclient.message_type == _glfw.x11.WM_PROTOCOLS)
{
const Atom protocol = event->xclient.data.l[0];
if (protocol == None)
return;
if (protocol == _glfw.x11.WM_DELETE_WINDOW)
{
// The window manager was asked to close the window, for example by
// the user pressing a 'close' window decoration button
_glfwInputWindowCloseRequest(window);
}
else if (protocol == _glfw.x11.NET_WM_PING)
{
// The window manager is pinging the application to ensure it's
// still responding to events
XEvent reply = *event;
reply.xclient.window = _glfw.x11.root;
XSendEvent(_glfw.x11.display, _glfw.x11.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&reply);
}
}
else if (event->xclient.message_type == _glfw.x11.XdndEnter)
{
// A drag operation has entered the window
// TODO: Check if UTF-8 string is supported by the source
}
else if (event->xclient.message_type == _glfw.x11.XdndDrop)
{
// The drag operation has finished dropping on
// the window, ask to convert it to a UTF-8 string
_glfw.x11.xdnd.source = event->xclient.data.l[0];
XConvertSelection(_glfw.x11.display,
_glfw.x11.XdndSelection,
_glfw.x11.UTF8_STRING,
_glfw.x11.XdndSelection,
window->x11.handle, CurrentTime);
}
else if (event->xclient.message_type == _glfw.x11.XdndPosition)
{
// The drag operation has moved over the window
const int absX = (event->xclient.data.l[2] >> 16) & 0xFFFF;
const int absY = (event->xclient.data.l[2]) & 0xFFFF;
int x, y;
_glfwPlatformGetWindowPos(window, &x, &y);
_glfwInputCursorMotion(window, absX - x, absY - y);
// Reply that we are ready to copy the dragged data
XEvent reply;
memset(&reply, 0, sizeof(reply));
reply.type = ClientMessage;
reply.xclient.window = event->xclient.data.l[0];
reply.xclient.message_type = _glfw.x11.XdndStatus;
reply.xclient.format = 32;
reply.xclient.data.l[0] = window->x11.handle;
reply.xclient.data.l[1] = 1; // Always accept the dnd with no rectangle
reply.xclient.data.l[2] = 0; // Specify an empty rectangle
reply.xclient.data.l[3] = 0;
reply.xclient.data.l[4] = _glfw.x11.XdndActionCopy;
XSendEvent(_glfw.x11.display, event->xclient.data.l[0],
False, NoEventMask, &reply);
XFlush(_glfw.x11.display);
}
return;
}
case SelectionNotify:
{
if (event->xselection.property)
{
// The converted data from the drag operation has arrived
char* data;
const int result =
_glfwGetWindowProperty(event->xselection.requestor,
event->xselection.property,
event->xselection.target,
(unsigned char**) &data);
if (result)
{
int i, count;
char** paths = parseUriList(data, &count);
_glfwInputDrop(window, count, (const char**) paths);
for (i = 0; i < count; i++)
free(paths[i]);
free(paths);
}
XFree(data);
XEvent reply;
memset(&reply, 0, sizeof(reply));
reply.type = ClientMessage;
reply.xclient.window = _glfw.x11.xdnd.source;
reply.xclient.message_type = _glfw.x11.XdndFinished;
reply.xclient.format = 32;
reply.xclient.data.l[0] = window->x11.handle;
reply.xclient.data.l[1] = result;
reply.xclient.data.l[2] = _glfw.x11.XdndActionCopy;
// Reply that all is well
XSendEvent(_glfw.x11.display, _glfw.x11.xdnd.source,
False, NoEventMask, &reply);
XFlush(_glfw.x11.display);
}
return;
}
case FocusIn:
{
if (event->xfocus.mode == NotifyGrab ||
event->xfocus.mode == NotifyUngrab)
{
// Ignore focus events from popup indicator windows, window menu
// key chords and window dragging
return;
}
if (window->x11.ic)
XSetICFocus(window->x11.ic);
if (window->cursorMode == GLFW_CURSOR_DISABLED)
disableCursor(window);
if (window->monitor && window->autoIconify)
enterFullscreenMode(window);
_glfwInputWindowFocus(window, GL_TRUE);
return;
}
case FocusOut:
{
if (event->xfocus.mode == NotifyGrab ||
event->xfocus.mode == NotifyUngrab)
{
// Ignore focus events from popup indicator windows, window menu
// key chords and window dragging
return;
}
if (window->x11.ic)
XUnsetICFocus(window->x11.ic);
if (window->cursorMode == GLFW_CURSOR_DISABLED)
restoreCursor(window);
if (window->monitor && window->autoIconify)
{
_glfwPlatformIconifyWindow(window);
leaveFullscreenMode(window);
}
_glfwInputWindowFocus(window, GL_FALSE);
return;
}
case Expose:
{
_glfwInputWindowDamage(window);
return;
}
case PropertyNotify:
{
if (event->xproperty.atom == _glfw.x11.WM_STATE &&
event->xproperty.state == PropertyNewValue)
{
const int state = getWindowState(window);
if (state == IconicState)
_glfwInputWindowIconify(window, GL_TRUE);
else if (state == NormalState)
_glfwInputWindowIconify(window, GL_FALSE);
}
return;
}
case SelectionClear:
{
handleSelectionClear(event);
return;
}
case SelectionRequest:
{
handleSelectionRequest(event);
return;
}
case DestroyNotify:
return;
#if defined(_GLFW_HAS_XINPUT)
case GenericEvent:
{
if (event->xcookie.extension == _glfw.x11.xi.majorOpcode &&
XGetEventData(_glfw.x11.display, &event->xcookie))
{
if (event->xcookie.evtype == XI_Motion)
{
XIDeviceEvent* data = (XIDeviceEvent*) event->xcookie.data;
window = findWindowByHandle(data->event);
if (window)
{
if (data->event_x != window->x11.warpPosX ||
data->event_y != window->x11.warpPosY)
{
// The cursor was moved by something other than GLFW
double x, y;
if (window->cursorMode == GLFW_CURSOR_DISABLED)
{
if (_glfw.cursorWindow != window)
return;
x = data->event_x - window->x11.cursorPosX;
y = data->event_y - window->x11.cursorPosY;
}
else
{
x = data->event_x;
y = data->event_y;
}
_glfwInputCursorMotion(window, x, y);
}
window->x11.cursorPosX = data->event_x;
window->x11.cursorPosY = data->event_y;
}
}
}
XFreeEventData(_glfw.x11.display, &event->xcookie);
return;
}
#endif /*_GLFW_HAS_XINPUT*/
}
if (event->type - _glfw.x11.randr.eventBase == RRScreenChangeNotify)
{
XRRUpdateConfiguration(event);
return;
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Retrieve a single window property of the specified type
// Inspired by fghGetWindowProperty from freeglut
//
unsigned long _glfwGetWindowProperty(Window window,
Atom property,
Atom type,
unsigned char** value)
{
Atom actualType;
int actualFormat;
unsigned long itemCount, bytesAfter;
XGetWindowProperty(_glfw.x11.display,
window,
property,
0,
LONG_MAX,
False,
type,
&actualType,
&actualFormat,
&itemCount,
&bytesAfter,
value);
if (type != AnyPropertyType && actualType != type)
return 0;
return itemCount;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
int _glfwPlatformCreateWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
if (!_glfwCreateContext(window, ctxconfig, fbconfig))
return GL_FALSE;
if (!createWindow(window, wndconfig))
return GL_FALSE;
if (wndconfig->monitor)
{
_glfwPlatformShowWindow(window);
enterFullscreenMode(window);
}
return GL_TRUE;
}
void _glfwPlatformDestroyWindow(_GLFWwindow* window)
{
if (window->monitor)
leaveFullscreenMode(window);
if (window->x11.ic)
{
XDestroyIC(window->x11.ic);
window->x11.ic = NULL;
}
_glfwDestroyContext(window);
if (window->x11.handle)
{
if (XGetSelectionOwner(_glfw.x11.display, _glfw.x11.CLIPBOARD) ==
window->x11.handle)
{
pushSelectionToManager(window);
}
XDeleteContext(_glfw.x11.display, window->x11.handle, _glfw.x11.context);
XUnmapWindow(_glfw.x11.display, window->x11.handle);
XDestroyWindow(_glfw.x11.display, window->x11.handle);
window->x11.handle = (Window) 0;
}
if (window->x11.colormap)
{
XFreeColormap(_glfw.x11.display, window->x11.colormap);
window->x11.colormap = (Colormap) 0;
}
XFlush(_glfw.x11.display);
}
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
{
#if defined(X_HAVE_UTF8_STRING)
Xutf8SetWMProperties(_glfw.x11.display,
window->x11.handle,
title, title,
NULL, 0,
NULL, NULL, NULL);
#else
// This may be a slightly better fallback than using XStoreName and
// XSetIconName, which always store their arguments using STRING
XmbSetWMProperties(_glfw.x11.display,
window->x11.handle,
title, title,
NULL, 0,
NULL, NULL, NULL);
#endif
if (_glfw.x11.NET_WM_NAME)
{
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.NET_WM_NAME, _glfw.x11.UTF8_STRING, 8,
PropModeReplace,
(unsigned char*) title, strlen(title));
}
if (_glfw.x11.NET_WM_ICON_NAME)
{
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.NET_WM_ICON_NAME, _glfw.x11.UTF8_STRING, 8,
PropModeReplace,
(unsigned char*) title, strlen(title));
}
XFlush(_glfw.x11.display);
}
void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
{
Window child;
int x, y;
XTranslateCoordinates(_glfw.x11.display, window->x11.handle, _glfw.x11.root,
0, 0, &x, &y, &child);
if (child)
{
int left, top;
XTranslateCoordinates(_glfw.x11.display, window->x11.handle, child,
0, 0, &left, &top, &child);
x -= left;
y -= top;
}
if (xpos)
*xpos = x;
if (ypos)
*ypos = y;
}
void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos)
{
XMoveWindow(_glfw.x11.display, window->x11.handle, xpos, ypos);
XFlush(_glfw.x11.display);
}
void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
{
XWindowAttributes attribs;
XGetWindowAttributes(_glfw.x11.display, window->x11.handle, &attribs);
if (width)
*width = attribs.width;
if (height)
*height = attribs.height;
}
void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
{
if (window->monitor)
{
_glfwSetVideoMode(window->monitor, &window->videoMode);
if (!_glfw.x11.NET_WM_STATE || !_glfw.x11.NET_WM_STATE_FULLSCREEN)
{
GLFWvidmode mode;
_glfwPlatformGetVideoMode(window->monitor, &mode);
XResizeWindow(_glfw.x11.display, window->x11.handle,
mode.width, mode.height);
}
}
else
{
if (!window->resizable)
{
// Update window size restrictions to match new window size
XSizeHints* hints = XAllocSizeHints();
hints->flags |= (PMinSize | PMaxSize);
hints->min_width = hints->max_width = width;
hints->min_height = hints->max_height = height;
XSetWMNormalHints(_glfw.x11.display, window->x11.handle, hints);
XFree(hints);
}
XResizeWindow(_glfw.x11.display, window->x11.handle, width, height);
}
XFlush(_glfw.x11.display);
}
void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* height)
{
_glfwPlatformGetWindowSize(window, width, height);
}
void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
int* left, int* top,
int* right, int* bottom)
{
long* extents = NULL;
if (_glfw.x11.NET_FRAME_EXTENTS == None)
return;
if (!_glfwPlatformWindowVisible(window) &&
_glfw.x11.NET_REQUEST_FRAME_EXTENTS)
{
double base;
XEvent event;
// Ensure _NET_FRAME_EXTENTS is set, allowing glfwGetWindowFrameSize to
// function before the window is mapped
sendEventToWM(window, _glfw.x11.NET_REQUEST_FRAME_EXTENTS,
0, 0, 0, 0, 0);
// HACK: Poll with timeout for the required reply instead of blocking
// This is done because some window managers (at least Unity,
// Fluxbox and Xfwm) failed to send the required reply
// They have been fixed but broken versions are still in the wild
// If you are affected by this and your window manager is NOT
// listed above, PLEASE report it to their and our issue trackers
base = _glfwPlatformGetTime();
while (!XCheckIfEvent(_glfw.x11.display,
&event,
isFrameExtentsEvent,
(XPointer) window))
{
double remaining;
struct timeval timeout;
remaining = 0.5 + base - _glfwPlatformGetTime();
if (remaining <= 0.0)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: The window manager has a broken _NET_REQUEST_FRAME_EXTENTS implementation; please report this issue");
return;
}
timeout.tv_sec = 0;
timeout.tv_usec = (long) (remaining * 1e6);
selectDisplayConnection(&timeout);
}
}
if (_glfwGetWindowProperty(window->x11.handle,
_glfw.x11.NET_FRAME_EXTENTS,
XA_CARDINAL,
(unsigned char**) &extents) == 4)
{
if (left)
*left = extents[0];
if (top)
*top = extents[2];
if (right)
*right = extents[1];
if (bottom)
*bottom = extents[3];
}
if (extents)
XFree(extents);
}
void _glfwPlatformIconifyWindow(_GLFWwindow* window)
{
if (!_glfw.x11.NET_WM_STATE || !_glfw.x11.NET_WM_STATE_FULLSCREEN)
{
// Override-redirect windows cannot be iconified or restored, as those
// tasks are performed by the window manager
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Iconification of full screen windows requires a WM that supports EWMH full screen");
return;
}
XIconifyWindow(_glfw.x11.display, window->x11.handle, _glfw.x11.screen);
XFlush(_glfw.x11.display);
}
void _glfwPlatformRestoreWindow(_GLFWwindow* window)
{
if (!_glfw.x11.NET_WM_STATE || !_glfw.x11.NET_WM_STATE_FULLSCREEN)
{
// Override-redirect windows cannot be iconified or restored, as those
// tasks are performed by the window manager
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Iconification of full screen windows requires a WM that supports EWMH full screen");
return;
}
XMapWindow(_glfw.x11.display, window->x11.handle);
XFlush(_glfw.x11.display);
}
void _glfwPlatformShowWindow(_GLFWwindow* window)
{
XMapRaised(_glfw.x11.display, window->x11.handle);
XFlush(_glfw.x11.display);
}
void _glfwPlatformUnhideWindow(_GLFWwindow* window)
{
XMapWindow(_glfw.x11.display, window->x11.handle);
XFlush(_glfw.x11.display);
}
void _glfwPlatformHideWindow(_GLFWwindow* window)
{
XUnmapWindow(_glfw.x11.display, window->x11.handle);
XFlush(_glfw.x11.display);
}
int _glfwPlatformWindowFocused(_GLFWwindow* window)
{
Window focused;
int state;
XGetInputFocus(_glfw.x11.display, &focused, &state);
return window->x11.handle == focused;
}
int _glfwPlatformWindowIconified(_GLFWwindow* window)
{
return getWindowState(window) == IconicState;
}
int _glfwPlatformWindowVisible(_GLFWwindow* window)
{
XWindowAttributes wa;
XGetWindowAttributes(_glfw.x11.display, window->x11.handle, &wa);
return wa.map_state == IsViewable;
}
void _glfwPlatformPollEvents(void)
{
int count = XPending(_glfw.x11.display);
while (count--)
{
XEvent event;
XNextEvent(_glfw.x11.display, &event);
processEvent(&event);
}
_GLFWwindow* window = _glfw.cursorWindow;
if (window && window->cursorMode == GLFW_CURSOR_DISABLED)
{
int width, height;
_glfwPlatformGetWindowSize(window, &width, &height);
_glfwPlatformSetCursorPos(window, width / 2, height / 2);
}
}
void _glfwPlatformWaitEvents(void)
{
if (!XPending(_glfw.x11.display))
selectDisplayConnection(NULL);
_glfwPlatformPollEvents();
}
void _glfwPlatformPostEmptyEvent(void)
{
XEvent event;
_GLFWwindow* window = _glfw.windowListHead;
memset(&event, 0, sizeof(event));
event.type = ClientMessage;
event.xclient.window = window->x11.handle;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = _glfw.x11.NULL_;
XSendEvent(_glfw.x11.display, window->x11.handle, False, 0, &event);
XFlush(_glfw.x11.display);
}
void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos)
{
Window root, child;
int rootX, rootY, childX, childY;
unsigned int mask;
XQueryPointer(_glfw.x11.display, window->x11.handle,
&root, &child,
&rootX, &rootY, &childX, &childY,
&mask);
if (xpos)
*xpos = childX;
if (ypos)
*ypos = childY;
}
void _glfwPlatformSetCursorPos(_GLFWwindow* window, double x, double y)
{
// Store the new position so it can be recognized later
window->x11.warpPosX = (int) x;
window->x11.warpPosY = (int) y;
XWarpPointer(_glfw.x11.display, None, window->x11.handle,
0,0,0,0, (int) x, (int) y);
}
void _glfwPlatformApplyCursorMode(_GLFWwindow* window)
{
switch (window->cursorMode)
{
case GLFW_CURSOR_NORMAL:
restoreCursor(window);
break;
case GLFW_CURSOR_HIDDEN:
hideCursor(window);
break;
case GLFW_CURSOR_DISABLED:
disableCursor(window);
break;
}
}
int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
const GLFWimage* image,
int xhot, int yhot)
{
cursor->x11.handle = _glfwCreateCursor(image, xhot, yhot);
if (!cursor->x11.handle)
return GL_FALSE;
return GL_TRUE;
}
int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, int shape)
{
cursor->x11.handle = XCreateFontCursor(_glfw.x11.display,
translateCursorShape(shape));
if (!cursor->x11.handle)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Failed to create standard cursor");
return GL_FALSE;
}
return GL_TRUE;
}
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
{
if (cursor->x11.handle)
XFreeCursor(_glfw.x11.display, cursor->x11.handle);
}
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
{
if (window->cursorMode == GLFW_CURSOR_NORMAL)
{
if (cursor)
XDefineCursor(_glfw.x11.display, window->x11.handle, cursor->x11.handle);
else
XUndefineCursor(_glfw.x11.display, window->x11.handle);
XFlush(_glfw.x11.display);
}
}
void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
{
free(_glfw.x11.clipboardString);
_glfw.x11.clipboardString = strdup(string);
XSetSelectionOwner(_glfw.x11.display,
_glfw.x11.CLIPBOARD,
window->x11.handle, CurrentTime);
if (XGetSelectionOwner(_glfw.x11.display, _glfw.x11.CLIPBOARD) !=
window->x11.handle)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Failed to become owner of clipboard selection");
}
}
const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
{
size_t i;
const Atom formats[] = { _glfw.x11.UTF8_STRING,
_glfw.x11.COMPOUND_STRING,
XA_STRING };
const size_t formatCount = sizeof(formats) / sizeof(formats[0]);
if (findWindowByHandle(XGetSelectionOwner(_glfw.x11.display,
_glfw.x11.CLIPBOARD)))
{
// Instead of doing a large number of X round-trips just to put this
// string into a window property and then read it back, just return it
return _glfw.x11.clipboardString;
}
free(_glfw.x11.clipboardString);
_glfw.x11.clipboardString = NULL;
for (i = 0; i < formatCount; i++)
{
char* data;
XEvent event;
XConvertSelection(_glfw.x11.display,
_glfw.x11.CLIPBOARD,
formats[i],
_glfw.x11.GLFW_SELECTION,
window->x11.handle, CurrentTime);
// XCheckTypedEvent is used instead of XIfEvent in order not to lock
// other threads out from the display during the entire wait period
while (!XCheckTypedEvent(_glfw.x11.display, SelectionNotify, &event))
selectDisplayConnection(NULL);
if (event.xselection.property == None)
continue;
if (_glfwGetWindowProperty(event.xselection.requestor,
event.xselection.property,
event.xselection.target,
(unsigned char**) &data))
{
_glfw.x11.clipboardString = strdup(data);
}
XFree(data);
XDeleteProperty(_glfw.x11.display,
event.xselection.requestor,
event.xselection.property);
if (_glfw.x11.clipboardString)
break;
}
if (_glfw.x11.clipboardString == NULL)
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"X11: Failed to convert clipboard to string");
}
return _glfw.x11.clipboardString;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI Display* glfwGetX11Display(void)
{
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
return _glfw.x11.display;
}
GLFWAPI Window glfwGetX11Window(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(None);
return window->x11.handle;
}
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