chromium/third_party/webrtc/modules/desktop_capture/linux/x11/window_list_utils.cc

/*
 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "modules/desktop_capture/linux/x11/window_list_utils.h"

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <string.h>

#include <algorithm>

#include "modules/desktop_capture/linux/x11/x_error_trap.h"
#include "modules/desktop_capture/linux/x11/x_window_property.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"

namespace webrtc {

namespace {

class DeferXFree { … };

DeferXFree::~DeferXFree() { … }

// Iterates through `window` hierarchy to find first visible window, i.e. one
// that has WM_STATE property set to NormalState.
// See http://tronche.com/gui/x/icccm/sec-4.html#s-4.1.3.1 .
::Window GetApplicationWindow(XAtomCache* cache, ::Window window) { … }

// Returns true if the `window` is a desktop element.
bool IsDesktopElement(XAtomCache* cache, ::Window window) { … }

}  // namespace

int32_t GetWindowState(XAtomCache* cache, ::Window window) { … }

bool GetWindowList(XAtomCache* cache,
                   rtc::FunctionView<bool(::Window)> on_window) { … }

bool GetWindowRect(::Display* display,
                   ::Window window,
                   DesktopRect* rect,
                   XWindowAttributes* attributes /* = nullptr */) { … }

}  // namespace webrtc