cef/libcef/browser/window_x11.cc

375 lines
12 KiB
C++

// Copyright 2014 The Chromium Embedded Framework Authors.
// Portions 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 "libcef/browser/window_x11.h"
#include "libcef/browser/thread_util.h"
#include <X11/extensions/XInput2.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include "ui/base/x/x11_util.h"
#include "ui/events/platform/x11/x11_event_source.h"
#include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
#include "ui/views/widget/desktop_aura/x11_topmost_window_finder.h"
namespace {
const char kWMDeleteWindow[] = "WM_DELETE_WINDOW";
const char kWMProtocols[] = "WM_PROTOCOLS";
const char kNetWMPing[] = "_NET_WM_PING";
const char kNetWMPid[] = "_NET_WM_PID";
const char kXdndProxy[] = "XdndProxy";
const char* kAtomsToCache[] = {
kWMDeleteWindow,
kWMProtocols,
kNetWMPing,
kNetWMPid,
kXdndProxy,
NULL
};
::Window FindEventTarget(const base::NativeEvent& xev) {
::Window target = xev->xany.window;
if (xev->type == GenericEvent)
target = static_cast<XIDeviceEvent*>(xev->xcookie.data)->event;
return target;
}
::Window FindChild(::Display* display, ::Window window) {
::Window root;
::Window parent;
::Window* children;
unsigned int nchildren;
if (XQueryTree(display, window, &root, &parent, &children, &nchildren)) {
DCHECK_EQ(1U, nchildren);
return children[0];
}
return None;
}
} // namespace
CEF_EXPORT XDisplay* cef_get_xdisplay() {
if (!CEF_CURRENTLY_ON(CEF_UIT))
return NULL;
return gfx::GetXDisplay();
}
CefWindowX11::CefWindowX11(CefRefPtr<CefBrowserHostImpl> browser,
::Window parent_xwindow,
const gfx::Rect& bounds)
: browser_(browser),
xdisplay_(gfx::GetXDisplay()),
parent_xwindow_(parent_xwindow),
xwindow_(0),
window_mapped_(false),
bounds_(bounds),
focus_pending_(false),
atom_cache_(xdisplay_, kAtomsToCache),
weak_ptr_factory_(this) {
if (parent_xwindow_ == None)
parent_xwindow_ = DefaultRootWindow(xdisplay_);
XSetWindowAttributes swa;
memset(&swa, 0, sizeof(swa));
swa.background_pixmap = None;
swa.override_redirect = false;
xwindow_ = XCreateWindow(
xdisplay_, parent_xwindow_,
bounds.x(), bounds.y(), bounds.width(), bounds.height(),
0, // border width
CopyFromParent, // depth
InputOutput,
CopyFromParent, // visual
CWBackPixmap | CWOverrideRedirect,
&swa);
if (ui::PlatformEventSource::GetInstance())
ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
long event_mask = FocusChangeMask | StructureNotifyMask | PropertyChangeMask;
XSelectInput(xdisplay_, xwindow_, event_mask);
XFlush(xdisplay_);
// TODO(erg): We currently only request window deletion events. We also
// should listen for activation events and anything else that GTK+ listens
// for, and do something useful.
::Atom protocols[2];
protocols[0] = atom_cache_.GetAtom(kWMDeleteWindow);
protocols[1] = atom_cache_.GetAtom(kNetWMPing);
XSetWMProtocols(xdisplay_, xwindow_, protocols, 2);
// We need a WM_CLIENT_MACHINE and WM_LOCALE_NAME value so we integrate with
// the desktop environment.
XSetWMProperties(xdisplay_, xwindow_, NULL, NULL, NULL, 0, NULL, NULL, NULL);
// Likewise, the X server needs to know this window's pid so it knows which
// program to kill if the window hangs.
// XChangeProperty() expects "pid" to be long.
COMPILE_ASSERT(sizeof(long) >= sizeof(pid_t), pid_t_bigger_than_long);
long pid = getpid();
XChangeProperty(xdisplay_,
xwindow_,
atom_cache_.GetAtom(kNetWMPid),
XA_CARDINAL,
32,
PropModeReplace,
reinterpret_cast<unsigned char*>(&pid), 1);
// Allow subclasses to create and cache additional atoms.
atom_cache_.allow_uncached_atoms();
}
CefWindowX11::~CefWindowX11() {
DCHECK(!xwindow_);
if (ui::PlatformEventSource::GetInstance())
ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
}
void CefWindowX11::Close() {
XEvent ev = {0};
ev.xclient.type = ClientMessage;
ev.xclient.window = xwindow_;
ev.xclient.message_type = atom_cache_.GetAtom(kWMProtocols);
ev.xclient.format = 32;
ev.xclient.data.l[0] = atom_cache_.GetAtom(kWMDeleteWindow);
ev.xclient.data.l[1] = CurrentTime;
XSendEvent(xdisplay_, xwindow_, False, NoEventMask, &ev);
}
void CefWindowX11::Show() {
if (xwindow_ == None)
return;
if (!window_mapped_) {
// Before we map the window, set size hints. Otherwise, some window managers
// will ignore toplevel XMoveWindow commands.
XSizeHints size_hints;
size_hints.flags = PPosition | PWinGravity;
size_hints.x = bounds_.x();
size_hints.y = bounds_.y();
// Set StaticGravity so that the window position is not affected by the
// frame width when running with window manager.
size_hints.win_gravity = StaticGravity;
XSetWMNormalHints(xdisplay_, xwindow_, &size_hints);
XMapWindow(xdisplay_, xwindow_);
// We now block until our window is mapped. Some X11 APIs will crash and
// burn if passed |xwindow_| before the window is mapped, and XMapWindow is
// asynchronous.
if (ui::X11EventSource::GetInstance())
ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
window_mapped_ = true;
}
}
void CefWindowX11::Hide() {
if (xwindow_ == None)
return;
if (window_mapped_) {
XWithdrawWindow(xdisplay_, xwindow_, 0);
window_mapped_ = false;
}
}
void CefWindowX11::Focus() {
if (xwindow_ == None || !window_mapped_)
return;
if (browser_) {
::Window child = FindChild(xdisplay_, xwindow_);
if (child && ui::IsWindowVisible(child)) {
// Give focus to the child DesktopWindowTreeHostX11.
XSetInputFocus(xdisplay_, child, RevertToParent, CurrentTime);
}
} else {
XSetInputFocus(xdisplay_, xwindow_, RevertToParent, CurrentTime);
}
}
void CefWindowX11::SetBounds(const gfx::Rect& bounds) {
if (xwindow_ == None)
return;
bool origin_changed = bounds_.origin() != bounds.origin();
bool size_changed = bounds_.size() != bounds.size();
XWindowChanges changes = {0};
unsigned value_mask = 0;
if (size_changed) {
changes.width = bounds.width();
changes.height = bounds.height();
value_mask = CWHeight | CWWidth;
}
if (origin_changed) {
changes.x = bounds.x();
changes.y = bounds.y();
value_mask |= CWX | CWY;
}
if (value_mask)
XConfigureWindow(xdisplay_, xwindow_, value_mask, &changes);
}
gfx::Rect CefWindowX11::GetBoundsInScreen() {
int x, y;
Window child;
if (XTranslateCoordinates(xdisplay_, xwindow_, DefaultRootWindow(xdisplay_),
0, 0, &x, &y, &child)) {
return gfx::Rect(gfx::Point(x, y), bounds_.size());
}
return gfx::Rect();
}
bool CefWindowX11::CanDispatchEvent(const ui::PlatformEvent& event) {
::Window target = FindEventTarget(event);
return target == xwindow_;
}
uint32_t CefWindowX11::DispatchEvent(const ui::PlatformEvent& event) {
XEvent* xev = event;
switch (xev->type) {
case ConfigureNotify: {
DCHECK_EQ(xwindow_, xev->xconfigure.event);
DCHECK_EQ(xwindow_, xev->xconfigure.window);
// It's possible that the X window may be resized by some other means
// than from within Aura (e.g. the X window manager can change the
// size). Make sure the root window size is maintained properly.
gfx::Rect bounds(xev->xconfigure.x, xev->xconfigure.y,
xev->xconfigure.width, xev->xconfigure.height);
bounds_ = bounds;
if (browser_) {
::Window child = FindChild(xdisplay_, xwindow_);
if (child) {
// Resize the child DesktopWindowTreeHostX11 to match this window.
XWindowChanges changes = {0};
changes.width = bounds.width();
changes.height = bounds.height();
XConfigureWindow(xdisplay_, child, CWHeight | CWWidth, &changes);
// Explicitly set the screen bounds so that WindowTreeHost::*Screen()
// methods return the correct results.
views::DesktopWindowTreeHostX11* window_tree_host =
views::DesktopWindowTreeHostX11::GetHostForXID(child);
if (window_tree_host)
window_tree_host->set_screen_bounds(bounds);
// Find the top-most window containing the browser window.
views::X11TopmostWindowFinder finder;
::Window topmost_window = finder.FindWindowAt(bounds.origin());
DCHECK(topmost_window);
// Configure the drag&drop proxy property for the top-most window so
// that all drag&drop-related messages will be sent to the child
// DesktopWindowTreeHostX11. The proxy property is referenced by
// DesktopDragDropClientAuraX11::FindWindowFor.
::Window proxy_target = gfx::kNullAcceleratedWidget;
ui::GetXIDProperty(topmost_window, kXdndProxy, &proxy_target);
if (proxy_target != child) {
// Set the proxy target for the top-most window.
XChangeProperty(xdisplay_,
topmost_window,
atom_cache_.GetAtom(kXdndProxy),
XA_WINDOW,
32,
PropModeReplace,
reinterpret_cast<unsigned char*>(&child), 1);
// Do the same for the proxy target per the spec.
XChangeProperty(xdisplay_,
child,
atom_cache_.GetAtom(kXdndProxy),
XA_WINDOW,
32,
PropModeReplace,
reinterpret_cast<unsigned char*>(&child), 1);
}
}
}
break;
}
case ClientMessage: {
Atom message_type = xev->xclient.message_type;
if (message_type == atom_cache_.GetAtom(kWMProtocols)) {
Atom protocol = static_cast<Atom>(xev->xclient.data.l[0]);
if (protocol == atom_cache_.GetAtom(kWMDeleteWindow)) {
// We have received a close message from the window manager.
if (browser_ && browser_->destruction_state() <=
CefBrowserHostImpl::DESTRUCTION_STATE_PENDING) {
if (browser_->destruction_state() ==
CefBrowserHostImpl::DESTRUCTION_STATE_NONE) {
// Request that the browser close.
browser_->CloseBrowser(false);
}
// Cancel the close.
} else {
// Allow the close.
XDestroyWindow(xdisplay_, xwindow_);
}
} else if (protocol == atom_cache_.GetAtom(kNetWMPing)) {
XEvent reply_event = *xev;
reply_event.xclient.window = parent_xwindow_;
XSendEvent(xdisplay_,
reply_event.xclient.window,
False,
SubstructureRedirectMask | SubstructureNotifyMask,
&reply_event);
XFlush(xdisplay_);
}
}
break;
}
case DestroyNotify:
xwindow_ = None;
if (browser_) {
// Force the browser to be destroyed and release the reference added
// in PlatformCreateWindow().
browser_->WindowDestroyed();
}
delete this;
break;
case FocusIn:
// This message is recieved first followed by a "_NET_ACTIVE_WINDOW"
// message sent to the root window. When X11DesktopHandler handles the
// "_NET_ACTIVE_WINDOW" message it will erroneously mark the WebView
// (hosted in a DesktopWindowTreeHostX11) as unfocused. Use a delayed
// task here to restore the WebView's focus state.
if (!focus_pending_) {
focus_pending_ = true;
CEF_POST_DELAYED_TASK(CEF_UIT,
base::Bind(&CefWindowX11::ContinueFocus,
weak_ptr_factory_.GetWeakPtr()),
100);
}
break;
case FocusOut:
// Cancel the pending focus change if some other window has gained focus
// while waiting for the async task to run. Otherwise we can get stuck in
// a focus change loop.
if (focus_pending_)
focus_pending_ = false;
break;
}
return ui::POST_DISPATCH_STOP_PROPAGATION;
}
void CefWindowX11::ContinueFocus() {
if (!focus_pending_)
return;
if (browser_)
browser_->SetFocus(true);
focus_pending_ = false;
}