mirror of
https://bitbucket.org/chromiumembedded/cef
synced 2024-12-12 17:46:04 +01:00
06e73fff15
- Add Views header files in a new include/views directory. - Add initial top-level window (CefWindow), control (CefBrowserView, CefLabelButton, CefMenuButton, CefPanel, CefScrollView, CefTextfield) and layout (CefBoxLayout, CefFlowLayout) support. See libcef/browser/views/view_impl.h comments for implementation details. - Add Views example usage in cefclient and cefsimple and Views unit tests in cef_unittests. Pass the `--use-views` command-line flag to cefclient, cefsimple and cef_unittests to run using the Views framework instead of platform APIs. For cefclient and cefsimple this will create the browser window and all related functionality using the Views framework. For cef_unittests this will run all tests (except OSR tests) in a Views-based browser window. Views- specific unit tests (`--gtest_filter=Views*`) will be run even if the the `--use-views` flag is not specified. - Pass the `--hide-frame` command-line flag to cefclient to demo a frameless Views-based browser window. - Pass the `--hide-controls` command-line flag to cefclient to demo a browser window without top controls. This also works in non-Views mode. - Pass the `--enable-high-dpi-support` command-line flag to cef_unittests on Windows to test high-DPI support on a display that supports it. - Add CefImage for reading/writing image file formats. - Add CefBrowser::DownloadImage() for downloading image URLs as a CefImage representation. This is primarily for loading favicons. - Add CefMenuModel::CreateMenuModel() and CefMenuModelDelegate for creating custom menus. This is primarily for use with CefMenuButton. - Add CefBrowser::TryCloseBrowser() helper for closing a browser. Also improve related documentation in cef_life_span_handler.h. - Rename cef_page_range_t to cef_range_t. It is now also used by CefTextfield. - Remove CefLifeSpanHandler::RunModal() which is never called. - Add draggable regions example to cefclient.
436 lines
14 KiB
C++
436 lines
14 KiB
C++
// Copyright 2014 The Chromium Embedded Framework Authors.
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// Portions copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "libcef/browser/native/window_x11.h"
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#include "libcef/browser/thread_util.h"
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#include <X11/extensions/XInput2.h>
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#include <X11/Xatom.h>
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#include <X11/Xutil.h>
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#include "ui/base/x/x11_util.h"
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#include "ui/events/platform/platform_event_source.h"
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#include "ui/events/platform/x11/x11_event_source.h"
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#include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
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#include "ui/views/widget/desktop_aura/x11_topmost_window_finder.h"
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namespace {
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const char kAtom[] = "ATOM";
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const char kWMDeleteWindow[] = "WM_DELETE_WINDOW";
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const char kWMProtocols[] = "WM_PROTOCOLS";
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const char kNetWMPid[] = "_NET_WM_PID";
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const char kNetWMPing[] = "_NET_WM_PING";
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const char kNetWMState[] = "_NET_WM_STATE";
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const char kXdndProxy[] = "XdndProxy";
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const char* kAtomsToCache[] = {
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kAtom,
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kWMDeleteWindow,
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kWMProtocols,
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kNetWMPid,
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kNetWMPing,
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kNetWMState,
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kXdndProxy,
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NULL
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};
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::Window FindEventTarget(const base::NativeEvent& xev) {
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::Window target = xev->xany.window;
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if (xev->type == GenericEvent)
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target = static_cast<XIDeviceEvent*>(xev->xcookie.data)->event;
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return target;
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}
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::Window FindChild(::Display* display, ::Window window) {
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::Window root;
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::Window parent;
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::Window* children;
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::Window child_window = None;
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unsigned int nchildren;
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if (XQueryTree(display, window, &root, &parent, &children, &nchildren)) {
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DCHECK_EQ(1U, nchildren);
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child_window = children[0];
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XFree(children);
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}
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return child_window;
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}
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::Window FindToplevelParent(::Display* display, ::Window window) {
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::Window top_level_window = window;
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::Window root = None;
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::Window parent = None;
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::Window* children = NULL;
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unsigned int nchildren = 0;
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// Enumerate all parents of "window" to find the highest level window
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// that either:
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// - has a parent that does not contain the _NET_WM_PID property
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// - has a parent that is the root window.
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while (XQueryTree(display, window, &root, &parent, &children, &nchildren)) {
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if (children) {
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XFree(children);
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}
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top_level_window = window;
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if (!ui::PropertyExists(parent, kNetWMPid) || parent == root) {
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break;
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}
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window = parent;
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}
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return top_level_window;
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}
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} // namespace
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CEF_EXPORT XDisplay* cef_get_xdisplay() {
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if (!CEF_CURRENTLY_ON(CEF_UIT))
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return NULL;
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return gfx::GetXDisplay();
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}
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CefWindowX11::CefWindowX11(CefRefPtr<CefBrowserHostImpl> browser,
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::Window parent_xwindow,
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const gfx::Rect& bounds)
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: browser_(browser),
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xdisplay_(gfx::GetXDisplay()),
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parent_xwindow_(parent_xwindow),
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xwindow_(0),
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window_mapped_(false),
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bounds_(bounds),
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focus_pending_(false),
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atom_cache_(xdisplay_, kAtomsToCache),
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weak_ptr_factory_(this) {
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if (parent_xwindow_ == None)
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parent_xwindow_ = DefaultRootWindow(xdisplay_);
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XSetWindowAttributes swa;
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memset(&swa, 0, sizeof(swa));
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swa.background_pixmap = None;
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swa.override_redirect = false;
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xwindow_ = XCreateWindow(
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xdisplay_, parent_xwindow_,
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bounds.x(), bounds.y(), bounds.width(), bounds.height(),
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0, // border width
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CopyFromParent, // depth
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InputOutput,
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CopyFromParent, // visual
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CWBackPixmap | CWOverrideRedirect,
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&swa);
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if (ui::PlatformEventSource::GetInstance())
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ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
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long event_mask = FocusChangeMask | StructureNotifyMask | PropertyChangeMask;
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XSelectInput(xdisplay_, xwindow_, event_mask);
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XFlush(xdisplay_);
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// TODO(erg): We currently only request window deletion events. We also
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// should listen for activation events and anything else that GTK+ listens
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// for, and do something useful.
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::Atom protocols[2];
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protocols[0] = atom_cache_.GetAtom(kWMDeleteWindow);
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protocols[1] = atom_cache_.GetAtom(kNetWMPing);
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XSetWMProtocols(xdisplay_, xwindow_, protocols, 2);
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// We need a WM_CLIENT_MACHINE and WM_LOCALE_NAME value so we integrate with
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// the desktop environment.
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XSetWMProperties(xdisplay_, xwindow_, NULL, NULL, NULL, 0, NULL, NULL, NULL);
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// Likewise, the X server needs to know this window's pid so it knows which
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// program to kill if the window hangs.
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// XChangeProperty() expects "pid" to be long.
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static_assert(sizeof(long) >= sizeof(pid_t),
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"pid_t should not be larger than long");
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long pid = getpid();
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XChangeProperty(xdisplay_,
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xwindow_,
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atom_cache_.GetAtom(kNetWMPid),
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XA_CARDINAL,
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32,
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PropModeReplace,
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reinterpret_cast<unsigned char*>(&pid), 1);
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// Allow subclasses to create and cache additional atoms.
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atom_cache_.allow_uncached_atoms();
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}
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CefWindowX11::~CefWindowX11() {
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DCHECK(!xwindow_);
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if (ui::PlatformEventSource::GetInstance())
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ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
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}
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void CefWindowX11::Close() {
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XEvent ev = {0};
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ev.xclient.type = ClientMessage;
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ev.xclient.window = xwindow_;
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ev.xclient.message_type = atom_cache_.GetAtom(kWMProtocols);
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ev.xclient.format = 32;
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ev.xclient.data.l[0] = atom_cache_.GetAtom(kWMDeleteWindow);
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ev.xclient.data.l[1] = CurrentTime;
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XSendEvent(xdisplay_, xwindow_, False, NoEventMask, &ev);
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}
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void CefWindowX11::Show() {
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if (xwindow_ == None)
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return;
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if (!window_mapped_) {
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// Before we map the window, set size hints. Otherwise, some window managers
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// will ignore toplevel XMoveWindow commands.
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XSizeHints size_hints;
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size_hints.flags = PPosition | PWinGravity;
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size_hints.x = bounds_.x();
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size_hints.y = bounds_.y();
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// Set StaticGravity so that the window position is not affected by the
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// frame width when running with window manager.
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size_hints.win_gravity = StaticGravity;
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XSetWMNormalHints(xdisplay_, xwindow_, &size_hints);
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XMapWindow(xdisplay_, xwindow_);
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// We now block until our window is mapped. Some X11 APIs will crash and
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// burn if passed |xwindow_| before the window is mapped, and XMapWindow is
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// asynchronous.
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if (ui::X11EventSource::GetInstance())
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ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(xwindow_);
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window_mapped_ = true;
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// Setup the drag and drop proxy on the top level window of the application
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// to be the child of this window.
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::Window child = FindChild(xdisplay_, xwindow_);
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::Window toplevel_window = FindToplevelParent(xdisplay_, xwindow_);
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DCHECK(toplevel_window);
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if (child && toplevel_window) {
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// Configure the drag&drop proxy property for the top-most window so
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// that all drag&drop-related messages will be sent to the child
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// DesktopWindowTreeHostX11. The proxy property is referenced by
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// DesktopDragDropClientAuraX11::FindWindowFor.
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::Window proxy_target = gfx::kNullAcceleratedWidget;
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ui::GetXIDProperty(toplevel_window, kXdndProxy, &proxy_target);
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if (proxy_target != child) {
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// Set the proxy target for the top-most window.
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XChangeProperty(xdisplay_,
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toplevel_window,
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atom_cache_.GetAtom(kXdndProxy),
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XA_WINDOW,
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32,
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PropModeReplace,
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reinterpret_cast<unsigned char*>(&child), 1);
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// Do the same for the proxy target per the spec.
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XChangeProperty(xdisplay_,
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child,
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atom_cache_.GetAtom(kXdndProxy),
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XA_WINDOW,
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32,
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PropModeReplace,
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reinterpret_cast<unsigned char*>(&child), 1);
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}
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}
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}
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}
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void CefWindowX11::Hide() {
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if (xwindow_ == None)
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return;
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if (window_mapped_) {
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XWithdrawWindow(xdisplay_, xwindow_, 0);
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window_mapped_ = false;
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}
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}
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void CefWindowX11::Focus() {
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if (xwindow_ == None || !window_mapped_)
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return;
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if (browser_.get()) {
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::Window child = FindChild(xdisplay_, xwindow_);
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if (child && ui::IsWindowVisible(child)) {
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// Give focus to the child DesktopWindowTreeHostX11.
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XSetInputFocus(xdisplay_, child, RevertToParent, CurrentTime);
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}
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} else {
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XSetInputFocus(xdisplay_, xwindow_, RevertToParent, CurrentTime);
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}
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}
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void CefWindowX11::SetBounds(const gfx::Rect& bounds) {
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if (xwindow_ == None)
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return;
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bool origin_changed = bounds_.origin() != bounds.origin();
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bool size_changed = bounds_.size() != bounds.size();
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XWindowChanges changes = {0};
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unsigned value_mask = 0;
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if (size_changed) {
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changes.width = bounds.width();
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changes.height = bounds.height();
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value_mask = CWHeight | CWWidth;
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}
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if (origin_changed) {
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changes.x = bounds.x();
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changes.y = bounds.y();
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value_mask |= CWX | CWY;
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}
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if (value_mask)
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XConfigureWindow(xdisplay_, xwindow_, value_mask, &changes);
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}
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gfx::Rect CefWindowX11::GetBoundsInScreen() {
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int x, y;
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Window child;
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if (XTranslateCoordinates(xdisplay_, xwindow_, DefaultRootWindow(xdisplay_),
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0, 0, &x, &y, &child)) {
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return gfx::Rect(gfx::Point(x, y), bounds_.size());
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}
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return gfx::Rect();
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}
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views::DesktopWindowTreeHostX11* CefWindowX11::GetHost() {
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if (browser_.get()) {
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::Window child = FindChild(xdisplay_, xwindow_);
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if (child)
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return views::DesktopWindowTreeHostX11::GetHostForXID(child);
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}
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return NULL;
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}
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bool CefWindowX11::CanDispatchEvent(const ui::PlatformEvent& event) {
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::Window target = FindEventTarget(event);
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return target == xwindow_;
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}
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uint32_t CefWindowX11::DispatchEvent(const ui::PlatformEvent& event) {
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XEvent* xev = event;
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switch (xev->type) {
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case ConfigureNotify: {
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DCHECK_EQ(xwindow_, xev->xconfigure.event);
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DCHECK_EQ(xwindow_, xev->xconfigure.window);
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// It's possible that the X window may be resized by some other means
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// than from within Aura (e.g. the X window manager can change the
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// size). Make sure the root window size is maintained properly.
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gfx::Rect bounds(xev->xconfigure.x, xev->xconfigure.y,
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xev->xconfigure.width, xev->xconfigure.height);
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bounds_ = bounds;
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if (browser_.get()) {
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::Window child = FindChild(xdisplay_, xwindow_);
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if (child) {
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// Resize the child DesktopWindowTreeHostX11 to match this window.
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XWindowChanges changes = {0};
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changes.width = bounds.width();
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changes.height = bounds.height();
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XConfigureWindow(xdisplay_, child, CWHeight | CWWidth, &changes);
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browser_->NotifyMoveOrResizeStarted();
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}
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}
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break;
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}
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case ClientMessage: {
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Atom message_type = xev->xclient.message_type;
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if (message_type == atom_cache_.GetAtom(kWMProtocols)) {
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Atom protocol = static_cast<Atom>(xev->xclient.data.l[0]);
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if (protocol == atom_cache_.GetAtom(kWMDeleteWindow)) {
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// We have received a close message from the window manager.
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if (!browser_ || browser_->TryCloseBrowser()) {
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// Allow the close.
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XDestroyWindow(xdisplay_, xwindow_);
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}
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} else if (protocol == atom_cache_.GetAtom(kNetWMPing)) {
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XEvent reply_event = *xev;
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reply_event.xclient.window = parent_xwindow_;
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XSendEvent(xdisplay_,
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reply_event.xclient.window,
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False,
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SubstructureRedirectMask | SubstructureNotifyMask,
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&reply_event);
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XFlush(xdisplay_);
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}
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}
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break;
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}
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case DestroyNotify:
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xwindow_ = None;
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if (browser_.get()) {
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// Force the browser to be destroyed and release the reference added
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// in PlatformCreateWindow().
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browser_->WindowDestroyed();
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}
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delete this;
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break;
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case FocusIn:
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// This message is received first followed by a "_NET_ACTIVE_WINDOW"
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// message sent to the root window. When X11DesktopHandler handles the
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// "_NET_ACTIVE_WINDOW" message it will erroneously mark the WebView
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// (hosted in a DesktopWindowTreeHostX11) as unfocused. Use a delayed
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// task here to restore the WebView's focus state.
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if (!focus_pending_) {
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focus_pending_ = true;
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CEF_POST_DELAYED_TASK(CEF_UIT,
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base::Bind(&CefWindowX11::ContinueFocus,
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weak_ptr_factory_.GetWeakPtr()),
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100);
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}
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break;
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case FocusOut:
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// Cancel the pending focus change if some other window has gained focus
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// while waiting for the async task to run. Otherwise we can get stuck in
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// a focus change loop.
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if (focus_pending_)
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focus_pending_ = false;
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break;
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case PropertyNotify: {
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::Atom changed_atom = xev->xproperty.atom;
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if (changed_atom == atom_cache_.GetAtom(kNetWMState)) {
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// State change event like minimize/maximize.
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if (browser_.get()) {
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::Window child = FindChild(xdisplay_, xwindow_);
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if (child) {
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// Forward the state change to the child DesktopWindowTreeHostX11
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// window so that resource usage will be reduced while the window is
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// minimized.
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std::vector< ::Atom> atom_list;
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if (ui::GetAtomArrayProperty(xwindow_, kNetWMState, &atom_list) &&
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!atom_list.empty()) {
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ui::SetAtomArrayProperty(child, kNetWMState, "ATOM", atom_list);
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} else {
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// Set an empty list of property values to pass the check in
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// DesktopWindowTreeHostX11::OnWMStateUpdated().
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XChangeProperty(xdisplay_,
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child,
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atom_cache_.GetAtom(kNetWMState), // name
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atom_cache_.GetAtom(kAtom), // type
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32, // size in bits of items in 'value'
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PropModeReplace,
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NULL,
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0); // num items
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}
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}
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}
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}
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break;
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}
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}
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return ui::POST_DISPATCH_STOP_PROPAGATION;
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}
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void CefWindowX11::ContinueFocus() {
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if (!focus_pending_)
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return;
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if (browser_.get())
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browser_->SetFocus(true);
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focus_pending_ = false;
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}
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