| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/macros.h" |
| #include "ui/events/platform/x11/x11_event_source.h" |
| |
| #include <glib.h> |
| #include <X11/Xlib.h> |
| |
| namespace ui { |
| |
| namespace { |
| |
| struct GLibX11Source : public GSource { |
| // Note: The GLibX11Source is created and destroyed by GLib. So its |
| // constructor/destructor may or may not get called. |
| XDisplay* display; |
| GPollFD* poll_fd; |
| }; |
| |
| gboolean XSourcePrepare(GSource* source, gint* timeout_ms) { |
| GLibX11Source* gxsource = static_cast<GLibX11Source*>(source); |
| if (XPending(gxsource->display)) |
| *timeout_ms = 0; |
| else |
| *timeout_ms = -1; |
| return FALSE; |
| } |
| |
| gboolean XSourceCheck(GSource* source) { |
| GLibX11Source* gxsource = static_cast<GLibX11Source*>(source); |
| return XPending(gxsource->display); |
| } |
| |
| gboolean XSourceDispatch(GSource* source, |
| GSourceFunc unused_func, |
| gpointer data) { |
| X11EventSource* x11_source = static_cast<X11EventSource*>(data); |
| x11_source->DispatchXEvents(); |
| return TRUE; |
| } |
| |
| GSourceFuncs XSourceFuncs = { |
| XSourcePrepare, |
| XSourceCheck, |
| XSourceDispatch, |
| NULL |
| }; |
| |
| class X11EventSourceGlib : public X11EventSource { |
| public: |
| explicit X11EventSourceGlib(XDisplay* display) |
| : X11EventSource(display), |
| x_source_(NULL) { |
| InitXSource(ConnectionNumber(display)); |
| } |
| |
| ~X11EventSourceGlib() override { |
| g_source_destroy(x_source_); |
| g_source_unref(x_source_); |
| } |
| |
| private: |
| void InitXSource(int fd) { |
| CHECK(!x_source_); |
| CHECK(display()) << "Unable to get connection to X server"; |
| |
| x_poll_.reset(new GPollFD()); |
| x_poll_->fd = fd; |
| x_poll_->events = G_IO_IN; |
| x_poll_->revents = 0; |
| |
| GLibX11Source* glib_x_source = static_cast<GLibX11Source*> |
| (g_source_new(&XSourceFuncs, sizeof(GLibX11Source))); |
| glib_x_source->display = display(); |
| glib_x_source->poll_fd = x_poll_.get(); |
| |
| x_source_ = glib_x_source; |
| g_source_add_poll(x_source_, x_poll_.get()); |
| g_source_set_can_recurse(x_source_, TRUE); |
| g_source_set_callback(x_source_, NULL, this, NULL); |
| g_source_attach(x_source_, g_main_context_default()); |
| } |
| |
| // The GLib event source for X events. |
| GSource* x_source_; |
| |
| // The poll attached to |x_source_|. |
| scoped_ptr<GPollFD> x_poll_; |
| |
| DISALLOW_COPY_AND_ASSIGN(X11EventSourceGlib); |
| }; |
| |
| } // namespace |
| |
| scoped_ptr<PlatformEventSource> PlatformEventSource::CreateDefault() { |
| return make_scoped_ptr(new X11EventSourceGlib(gfx::GetXDisplay())); |
| } |
| |
| } // namespace ui |