Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.
BUG=N/A R=andrew@webrtc.org, wu@webrtc.org Review URL: https://webrtc-codereview.appspot.com/12199004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
henrike@webrtc.org
818
webrtc/base/linuxwindowpicker.cc
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818
webrtc/base/linuxwindowpicker.cc
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@ -0,0 +1,818 @@
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/*
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* Copyright 2010 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/base/linuxwindowpicker.h"
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#include <math.h>
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#include <string.h>
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#include <algorithm>
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#include <string>
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#include <X11/Xatom.h>
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#include <X11/extensions/Xcomposite.h>
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#include <X11/extensions/Xrender.h>
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#include <X11/Xutil.h>
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#include "webrtc/base/logging.h"
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namespace rtc {
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// Convenience wrapper for XGetWindowProperty results.
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template <class PropertyType>
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class XWindowProperty {
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public:
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XWindowProperty(Display* display, Window window, Atom property)
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: data_(NULL) {
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const int kBitsPerByte = 8;
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Atom actual_type;
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int actual_format;
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unsigned long bytes_after; // NOLINT: type required by XGetWindowProperty
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int status = XGetWindowProperty(display, window, property, 0L, ~0L, False,
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AnyPropertyType, &actual_type,
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&actual_format, &size_,
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&bytes_after, &data_);
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succeeded_ = (status == Success);
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if (!succeeded_) {
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data_ = NULL; // Ensure nothing is freed.
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} else if (sizeof(PropertyType) * kBitsPerByte != actual_format) {
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LOG(LS_WARNING) << "Returned type size differs from "
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"requested type size.";
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succeeded_ = false;
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// We still need to call XFree in this case, so leave data_ alone.
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}
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if (!succeeded_) {
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size_ = 0;
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}
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}
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~XWindowProperty() {
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if (data_) {
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XFree(data_);
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}
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}
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bool succeeded() const { return succeeded_; }
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size_t size() const { return size_; }
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const PropertyType* data() const {
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return reinterpret_cast<PropertyType*>(data_);
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}
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PropertyType* data() {
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return reinterpret_cast<PropertyType*>(data_);
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}
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private:
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bool succeeded_;
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unsigned long size_; // NOLINT: type required by XGetWindowProperty
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unsigned char* data_;
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DISALLOW_COPY_AND_ASSIGN(XWindowProperty);
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};
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// Stupid X11. It seems none of the synchronous returns codes from X11 calls
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// are meaningful unless an asynchronous error handler is configured. This
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// RAII class registers and unregisters an X11 error handler.
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class XErrorSuppressor {
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public:
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explicit XErrorSuppressor(Display* display)
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: display_(display), original_error_handler_(NULL) {
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SuppressX11Errors();
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}
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~XErrorSuppressor() {
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UnsuppressX11Errors();
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}
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private:
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static int ErrorHandler(Display* display, XErrorEvent* e) {
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char buf[256];
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XGetErrorText(display, e->error_code, buf, sizeof buf);
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LOG(LS_WARNING) << "Received X11 error \"" << buf << "\" for request code "
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<< static_cast<unsigned int>(e->request_code);
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return 0;
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}
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void SuppressX11Errors() {
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XFlush(display_);
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XSync(display_, False);
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original_error_handler_ = XSetErrorHandler(&ErrorHandler);
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}
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void UnsuppressX11Errors() {
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XFlush(display_);
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XSync(display_, False);
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XErrorHandler handler = XSetErrorHandler(original_error_handler_);
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if (handler != &ErrorHandler) {
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LOG(LS_WARNING) << "Unbalanced XSetErrorHandler() calls detected. "
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<< "Final error handler may not be what you expect!";
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}
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original_error_handler_ = NULL;
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}
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Display* display_;
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XErrorHandler original_error_handler_;
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DISALLOW_COPY_AND_ASSIGN(XErrorSuppressor);
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};
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// Hiding all X11 specifics inside its own class. This to avoid
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// conflicts between talk and X11 header declarations.
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class XWindowEnumerator {
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public:
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XWindowEnumerator()
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: display_(NULL),
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has_composite_extension_(false),
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has_render_extension_(false) {
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}
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~XWindowEnumerator() {
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if (display_ != NULL) {
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XCloseDisplay(display_);
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}
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}
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bool Init() {
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if (display_ != NULL) {
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// Already initialized.
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return true;
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}
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display_ = XOpenDisplay(NULL);
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if (display_ == NULL) {
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LOG(LS_ERROR) << "Failed to open display.";
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return false;
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}
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XErrorSuppressor error_suppressor(display_);
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wm_state_ = XInternAtom(display_, "WM_STATE", True);
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net_wm_icon_ = XInternAtom(display_, "_NET_WM_ICON", False);
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int event_base, error_base, major_version, minor_version;
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if (XCompositeQueryExtension(display_, &event_base, &error_base) &&
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XCompositeQueryVersion(display_, &major_version, &minor_version) &&
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// XCompositeNameWindowPixmap() requires version 0.2
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(major_version > 0 || minor_version >= 2)) {
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has_composite_extension_ = true;
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} else {
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LOG(LS_INFO) << "Xcomposite extension not available or too old.";
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}
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if (XRenderQueryExtension(display_, &event_base, &error_base) &&
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XRenderQueryVersion(display_, &major_version, &minor_version) &&
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// XRenderSetPictureTransform() requires version 0.6
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(major_version > 0 || minor_version >= 6)) {
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has_render_extension_ = true;
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} else {
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LOG(LS_INFO) << "Xrender extension not available or too old.";
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}
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return true;
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}
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bool EnumerateWindows(WindowDescriptionList* descriptions) {
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if (!Init()) {
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return false;
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}
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XErrorSuppressor error_suppressor(display_);
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int num_screens = XScreenCount(display_);
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bool result = false;
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for (int i = 0; i < num_screens; ++i) {
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if (EnumerateScreenWindows(descriptions, i)) {
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// We know we succeded on at least one screen.
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result = true;
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}
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}
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return result;
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}
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bool EnumerateDesktops(DesktopDescriptionList* descriptions) {
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if (!Init()) {
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return false;
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}
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XErrorSuppressor error_suppressor(display_);
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Window default_root_window = XDefaultRootWindow(display_);
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int num_screens = XScreenCount(display_);
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for (int i = 0; i < num_screens; ++i) {
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Window root_window = XRootWindow(display_, i);
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DesktopId id(DesktopId(root_window, i));
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// TODO: Figure out an appropriate desktop title.
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DesktopDescription desc(id, "");
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desc.set_primary(root_window == default_root_window);
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descriptions->push_back(desc);
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}
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return num_screens > 0;
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}
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bool IsVisible(const WindowId& id) {
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if (!Init()) {
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return false;
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}
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XErrorSuppressor error_suppressor(display_);
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XWindowAttributes attr;
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if (!XGetWindowAttributes(display_, id.id(), &attr)) {
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LOG(LS_ERROR) << "XGetWindowAttributes() failed";
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return false;
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}
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return attr.map_state == IsViewable;
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}
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bool MoveToFront(const WindowId& id) {
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if (!Init()) {
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return false;
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}
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XErrorSuppressor error_suppressor(display_);
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unsigned int num_children;
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Window* children;
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Window parent;
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Window root;
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// Find root window to pass event to.
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int status = XQueryTree(display_, id.id(), &root, &parent, &children,
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&num_children);
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if (status == 0) {
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LOG(LS_WARNING) << "Failed to query for child windows.";
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return false;
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}
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if (children != NULL) {
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XFree(children);
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}
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// Move the window to front.
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XRaiseWindow(display_, id.id());
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// Some window managers (e.g., metacity in GNOME) consider it illegal to
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// raise a window without also giving it input focus with
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// _NET_ACTIVE_WINDOW, so XRaiseWindow() on its own isn't enough.
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Atom atom = XInternAtom(display_, "_NET_ACTIVE_WINDOW", True);
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if (atom != None) {
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XEvent xev;
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long event_mask;
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xev.xclient.type = ClientMessage;
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xev.xclient.serial = 0;
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xev.xclient.send_event = True;
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xev.xclient.window = id.id();
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xev.xclient.message_type = atom;
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// The format member is set to 8, 16, or 32 and specifies whether the
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// data should be viewed as a list of bytes, shorts, or longs.
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xev.xclient.format = 32;
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xev.xclient.data.l[0] = 0;
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xev.xclient.data.l[1] = 0;
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xev.xclient.data.l[2] = 0;
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xev.xclient.data.l[3] = 0;
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xev.xclient.data.l[4] = 0;
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event_mask = SubstructureRedirectMask | SubstructureNotifyMask;
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XSendEvent(display_, root, False, event_mask, &xev);
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}
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XFlush(display_);
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return true;
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}
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uint8* GetWindowIcon(const WindowId& id, int* width, int* height) {
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if (!Init()) {
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return NULL;
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}
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XErrorSuppressor error_suppressor(display_);
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Atom ret_type;
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int format;
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unsigned long length, bytes_after, size;
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unsigned char* data = NULL;
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// Find out the size of the icon data.
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if (XGetWindowProperty(
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display_, id.id(), net_wm_icon_, 0, 0, False, XA_CARDINAL,
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&ret_type, &format, &length, &size, &data) == Success &&
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data) {
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XFree(data);
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} else {
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LOG(LS_ERROR) << "Failed to get size of the icon.";
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return NULL;
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}
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// Get the icon data, the format is one uint32 each for width and height,
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// followed by the actual pixel data.
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if (size >= 2 &&
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XGetWindowProperty(
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display_, id.id(), net_wm_icon_, 0, size, False, XA_CARDINAL,
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&ret_type, &format, &length, &bytes_after, &data) == Success &&
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data) {
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uint32* data_ptr = reinterpret_cast<uint32*>(data);
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int w, h;
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w = data_ptr[0];
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h = data_ptr[1];
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if (size < static_cast<unsigned long>(w * h + 2)) {
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XFree(data);
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LOG(LS_ERROR) << "Not a vaild icon.";
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return NULL;
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}
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uint8* rgba =
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ArgbToRgba(&data_ptr[2], 0, 0, w, h, w, h, true);
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XFree(data);
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*width = w;
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*height = h;
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return rgba;
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} else {
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LOG(LS_ERROR) << "Failed to get window icon data.";
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return NULL;
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}
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}
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uint8* GetWindowThumbnail(const WindowId& id, int width, int height) {
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if (!Init()) {
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return NULL;
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}
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if (!has_composite_extension_) {
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// Without the Xcomposite extension we would only get a good thumbnail if
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// the whole window is visible on screen and not covered by any
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// other window. This is not something we want so instead, just
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// bail out.
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LOG(LS_INFO) << "No Xcomposite extension detected.";
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return NULL;
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}
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XErrorSuppressor error_suppressor(display_);
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Window root;
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int x;
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int y;
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unsigned int src_width;
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unsigned int src_height;
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unsigned int border_width;
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unsigned int depth;
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// In addition to needing X11 server-side support for Xcomposite, it
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// actually needs to be turned on for this window in order to get a good
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// thumbnail. If the user has modern hardware/drivers but isn't using a
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// compositing window manager, that won't be the case. Here we
|
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// automatically turn it on for shareable windows so that we can get
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// thumbnails. We used to avoid it because the transition is visually ugly,
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// but recent window managers don't always redirect windows which led to
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// no thumbnails at all, which is a worse experience.
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// Redirect drawing to an offscreen buffer (ie, turn on compositing).
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// X11 remembers what has requested this and will turn it off for us when
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// we exit.
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XCompositeRedirectWindow(display_, id.id(), CompositeRedirectAutomatic);
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Pixmap src_pixmap = XCompositeNameWindowPixmap(display_, id.id());
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if (!src_pixmap) {
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// Even if the backing pixmap doesn't exist, this still should have
|
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// succeeded and returned a valid handle (it just wouldn't be a handle to
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// anything). So this is a real error path.
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LOG(LS_ERROR) << "XCompositeNameWindowPixmap() failed";
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return NULL;
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}
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if (!XGetGeometry(display_, src_pixmap, &root, &x, &y,
|
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&src_width, &src_height, &border_width,
|
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&depth)) {
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// If the window does not actually have a backing pixmap, this is the path
|
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// that will "fail", so it's a warning rather than an error.
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LOG(LS_WARNING) << "XGetGeometry() failed (probably composite is not in "
|
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<< "use)";
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XFreePixmap(display_, src_pixmap);
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return NULL;
|
||||
}
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||||
// If we get to here, then composite is in use for this window and it has a
|
||||
// valid backing pixmap.
|
||||
|
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XWindowAttributes attr;
|
||||
if (!XGetWindowAttributes(display_, id.id(), &attr)) {
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||||
LOG(LS_ERROR) << "XGetWindowAttributes() failed";
|
||||
XFreePixmap(display_, src_pixmap);
|
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return NULL;
|
||||
}
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||||
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||||
uint8* data = GetDrawableThumbnail(src_pixmap,
|
||||
attr.visual,
|
||||
src_width,
|
||||
src_height,
|
||||
width,
|
||||
height);
|
||||
XFreePixmap(display_, src_pixmap);
|
||||
return data;
|
||||
}
|
||||
|
||||
int GetNumDesktops() {
|
||||
if (!Init()) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
return XScreenCount(display_);
|
||||
}
|
||||
|
||||
uint8* GetDesktopThumbnail(const DesktopId& id, int width, int height) {
|
||||
if (!Init()) {
|
||||
return NULL;
|
||||
}
|
||||
XErrorSuppressor error_suppressor(display_);
|
||||
|
||||
Window root_window = id.id();
|
||||
XWindowAttributes attr;
|
||||
if (!XGetWindowAttributes(display_, root_window, &attr)) {
|
||||
LOG(LS_ERROR) << "XGetWindowAttributes() failed";
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return GetDrawableThumbnail(root_window,
|
||||
attr.visual,
|
||||
attr.width,
|
||||
attr.height,
|
||||
width,
|
||||
height);
|
||||
}
|
||||
|
||||
bool GetDesktopDimensions(const DesktopId& id, int* width, int* height) {
|
||||
if (!Init()) {
|
||||
return false;
|
||||
}
|
||||
XErrorSuppressor error_suppressor(display_);
|
||||
XWindowAttributes attr;
|
||||
if (!XGetWindowAttributes(display_, id.id(), &attr)) {
|
||||
LOG(LS_ERROR) << "XGetWindowAttributes() failed";
|
||||
return false;
|
||||
}
|
||||
*width = attr.width;
|
||||
*height = attr.height;
|
||||
return true;
|
||||
}
|
||||
|
||||
private:
|
||||
uint8* GetDrawableThumbnail(Drawable src_drawable,
|
||||
Visual* visual,
|
||||
int src_width,
|
||||
int src_height,
|
||||
int dst_width,
|
||||
int dst_height) {
|
||||
if (!has_render_extension_) {
|
||||
// Without the Xrender extension we would have to read the full window and
|
||||
// scale it down in our process. Xrender is over a decade old so we aren't
|
||||
// going to expend effort to support that situation. We still need to
|
||||
// check though because probably some virtual VNC displays are in this
|
||||
// category.
|
||||
LOG(LS_INFO) << "No Xrender extension detected.";
|
||||
return NULL;
|
||||
}
|
||||
|
||||
XRenderPictFormat* format = XRenderFindVisualFormat(display_,
|
||||
visual);
|
||||
if (!format) {
|
||||
LOG(LS_ERROR) << "XRenderFindVisualFormat() failed";
|
||||
return NULL;
|
||||
}
|
||||
|
||||
// Create a picture to reference the window pixmap.
|
||||
XRenderPictureAttributes pa;
|
||||
pa.subwindow_mode = IncludeInferiors; // Don't clip child widgets
|
||||
Picture src = XRenderCreatePicture(display_,
|
||||
src_drawable,
|
||||
format,
|
||||
CPSubwindowMode,
|
||||
&pa);
|
||||
if (!src) {
|
||||
LOG(LS_ERROR) << "XRenderCreatePicture() failed";
|
||||
return NULL;
|
||||
}
|
||||
|
||||
// Create a picture to reference the destination pixmap.
|
||||
Pixmap dst_pixmap = XCreatePixmap(display_,
|
||||
src_drawable,
|
||||
dst_width,
|
||||
dst_height,
|
||||
format->depth);
|
||||
if (!dst_pixmap) {
|
||||
LOG(LS_ERROR) << "XCreatePixmap() failed";
|
||||
XRenderFreePicture(display_, src);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
Picture dst = XRenderCreatePicture(display_, dst_pixmap, format, 0, NULL);
|
||||
if (!dst) {
|
||||
LOG(LS_ERROR) << "XRenderCreatePicture() failed";
|
||||
XFreePixmap(display_, dst_pixmap);
|
||||
XRenderFreePicture(display_, src);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
// Clear the background.
|
||||
XRenderColor transparent = {0};
|
||||
XRenderFillRectangle(display_,
|
||||
PictOpSrc,
|
||||
dst,
|
||||
&transparent,
|
||||
0,
|
||||
0,
|
||||
dst_width,
|
||||
dst_height);
|
||||
|
||||
// Calculate how much we need to scale the image.
|
||||
double scale_x = static_cast<double>(dst_width) /
|
||||
static_cast<double>(src_width);
|
||||
double scale_y = static_cast<double>(dst_height) /
|
||||
static_cast<double>(src_height);
|
||||
double scale = rtc::_min(scale_y, scale_x);
|
||||
|
||||
int scaled_width = round(src_width * scale);
|
||||
int scaled_height = round(src_height * scale);
|
||||
|
||||
// Render the thumbnail centered on both axis.
|
||||
int centered_x = (dst_width - scaled_width) / 2;
|
||||
int centered_y = (dst_height - scaled_height) / 2;
|
||||
|
||||
// Scaling matrix
|
||||
XTransform xform = { {
|
||||
{ XDoubleToFixed(1), XDoubleToFixed(0), XDoubleToFixed(0) },
|
||||
{ XDoubleToFixed(0), XDoubleToFixed(1), XDoubleToFixed(0) },
|
||||
{ XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(scale) }
|
||||
} };
|
||||
XRenderSetPictureTransform(display_, src, &xform);
|
||||
|
||||
// Apply filter to smooth out the image.
|
||||
XRenderSetPictureFilter(display_, src, FilterBest, NULL, 0);
|
||||
|
||||
// Render the image to the destination picture.
|
||||
XRenderComposite(display_,
|
||||
PictOpSrc,
|
||||
src,
|
||||
None,
|
||||
dst,
|
||||
0,
|
||||
0,
|
||||
0,
|
||||
0,
|
||||
centered_x,
|
||||
centered_y,
|
||||
scaled_width,
|
||||
scaled_height);
|
||||
|
||||
// Get the pixel data from the X server. TODO: XGetImage
|
||||
// might be slow here, compare with ShmGetImage.
|
||||
XImage* image = XGetImage(display_,
|
||||
dst_pixmap,
|
||||
0,
|
||||
0,
|
||||
dst_width,
|
||||
dst_height,
|
||||
AllPlanes, ZPixmap);
|
||||
uint8* data = ArgbToRgba(reinterpret_cast<uint32*>(image->data),
|
||||
centered_x,
|
||||
centered_y,
|
||||
scaled_width,
|
||||
scaled_height,
|
||||
dst_width,
|
||||
dst_height,
|
||||
false);
|
||||
XDestroyImage(image);
|
||||
XRenderFreePicture(display_, dst);
|
||||
XFreePixmap(display_, dst_pixmap);
|
||||
XRenderFreePicture(display_, src);
|
||||
return data;
|
||||
}
|
||||
|
||||
uint8* ArgbToRgba(uint32* argb_data, int x, int y, int w, int h,
|
||||
int stride_x, int stride_y, bool has_alpha) {
|
||||
uint8* p;
|
||||
int len = stride_x * stride_y * 4;
|
||||
uint8* data = new uint8[len];
|
||||
memset(data, 0, len);
|
||||
p = data + 4 * (y * stride_x + x);
|
||||
for (int i = 0; i < h; ++i) {
|
||||
for (int j = 0; j < w; ++j) {
|
||||
uint32 argb;
|
||||
uint32 rgba;
|
||||
argb = argb_data[stride_x * (y + i) + x + j];
|
||||
rgba = (argb << 8) | (argb >> 24);
|
||||
*p = rgba >> 24;
|
||||
++p;
|
||||
*p = (rgba >> 16) & 0xff;
|
||||
++p;
|
||||
*p = (rgba >> 8) & 0xff;
|
||||
++p;
|
||||
*p = has_alpha ? rgba & 0xFF : 0xFF;
|
||||
++p;
|
||||
}
|
||||
p += (stride_x - w) * 4;
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
bool EnumerateScreenWindows(WindowDescriptionList* descriptions, int screen) {
|
||||
Window parent;
|
||||
Window *children;
|
||||
int status;
|
||||
unsigned int num_children;
|
||||
Window root_window = XRootWindow(display_, screen);
|
||||
status = XQueryTree(display_, root_window, &root_window, &parent, &children,
|
||||
&num_children);
|
||||
if (status == 0) {
|
||||
LOG(LS_ERROR) << "Failed to query for child windows.";
|
||||
return false;
|
||||
}
|
||||
for (unsigned int i = 0; i < num_children; ++i) {
|
||||
// Iterate in reverse order to display windows from front to back.
|
||||
#ifdef CHROMEOS
|
||||
// TODO(jhorwich): Short-term fix for crbug.com/120229: Don't need to
|
||||
// filter, just return all windows and let the picker scan through them.
|
||||
Window app_window = children[num_children - 1 - i];
|
||||
#else
|
||||
Window app_window = GetApplicationWindow(children[num_children - 1 - i]);
|
||||
#endif
|
||||
if (app_window &&
|
||||
!LinuxWindowPicker::IsDesktopElement(display_, app_window)) {
|
||||
std::string title;
|
||||
if (GetWindowTitle(app_window, &title)) {
|
||||
WindowId id(app_window);
|
||||
WindowDescription desc(id, title);
|
||||
descriptions->push_back(desc);
|
||||
}
|
||||
}
|
||||
}
|
||||
if (children != NULL) {
|
||||
XFree(children);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool GetWindowTitle(Window window, std::string* title) {
|
||||
int status;
|
||||
bool result = false;
|
||||
XTextProperty window_name;
|
||||
window_name.value = NULL;
|
||||
if (window) {
|
||||
status = XGetWMName(display_, window, &window_name);
|
||||
if (status && window_name.value && window_name.nitems) {
|
||||
int cnt;
|
||||
char **list = NULL;
|
||||
status = Xutf8TextPropertyToTextList(display_, &window_name, &list,
|
||||
&cnt);
|
||||
if (status >= Success && cnt && *list) {
|
||||
if (cnt > 1) {
|
||||
LOG(LS_INFO) << "Window has " << cnt
|
||||
<< " text properties, only using the first one.";
|
||||
}
|
||||
*title = *list;
|
||||
result = true;
|
||||
}
|
||||
if (list != NULL) {
|
||||
XFreeStringList(list);
|
||||
}
|
||||
}
|
||||
if (window_name.value != NULL) {
|
||||
XFree(window_name.value);
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
Window GetApplicationWindow(Window window) {
|
||||
Window root, parent;
|
||||
Window app_window = 0;
|
||||
Window *children;
|
||||
unsigned int num_children;
|
||||
Atom type = None;
|
||||
int format;
|
||||
unsigned long nitems, after;
|
||||
unsigned char *data;
|
||||
|
||||
int ret = XGetWindowProperty(display_, window,
|
||||
wm_state_, 0L, 2,
|
||||
False, wm_state_, &type, &format,
|
||||
&nitems, &after, &data);
|
||||
if (ret != Success) {
|
||||
LOG(LS_ERROR) << "XGetWindowProperty failed with return code " << ret
|
||||
<< " for window " << window << ".";
|
||||
return 0;
|
||||
}
|
||||
if (type != None) {
|
||||
int64 state = static_cast<int64>(*data);
|
||||
XFree(data);
|
||||
return state == NormalState ? window : 0;
|
||||
}
|
||||
XFree(data);
|
||||
if (!XQueryTree(display_, window, &root, &parent, &children,
|
||||
&num_children)) {
|
||||
LOG(LS_ERROR) << "Failed to query for child windows although window"
|
||||
<< "does not have a valid WM_STATE.";
|
||||
return 0;
|
||||
}
|
||||
for (unsigned int i = 0; i < num_children; ++i) {
|
||||
app_window = GetApplicationWindow(children[i]);
|
||||
if (app_window) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (children != NULL) {
|
||||
XFree(children);
|
||||
}
|
||||
return app_window;
|
||||
}
|
||||
|
||||
Atom wm_state_;
|
||||
Atom net_wm_icon_;
|
||||
Display* display_;
|
||||
bool has_composite_extension_;
|
||||
bool has_render_extension_;
|
||||
};
|
||||
|
||||
LinuxWindowPicker::LinuxWindowPicker() : enumerator_(new XWindowEnumerator()) {
|
||||
}
|
||||
|
||||
LinuxWindowPicker::~LinuxWindowPicker() {
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::IsDesktopElement(_XDisplay* display, Window window) {
|
||||
if (window == 0) {
|
||||
LOG(LS_WARNING) << "Zero is never a valid window.";
|
||||
return false;
|
||||
}
|
||||
|
||||
// First look for _NET_WM_WINDOW_TYPE. The standard
|
||||
// (http://standards.freedesktop.org/wm-spec/latest/ar01s05.html#id2760306)
|
||||
// says this hint *should* be present on all windows, and we use the existence
|
||||
// of _NET_WM_WINDOW_TYPE_NORMAL in the property to indicate a window is not
|
||||
// a desktop element (that is, only "normal" windows should be shareable).
|
||||
Atom window_type_atom = XInternAtom(display, "_NET_WM_WINDOW_TYPE", True);
|
||||
XWindowProperty<uint32_t> window_type(display, window, window_type_atom);
|
||||
if (window_type.succeeded() && window_type.size() > 0) {
|
||||
Atom normal_window_type_atom = XInternAtom(
|
||||
display, "_NET_WM_WINDOW_TYPE_NORMAL", True);
|
||||
uint32_t* end = window_type.data() + window_type.size();
|
||||
bool is_normal = (end != std::find(
|
||||
window_type.data(), end, normal_window_type_atom));
|
||||
return !is_normal;
|
||||
}
|
||||
|
||||
// Fall back on using the hint.
|
||||
XClassHint class_hint;
|
||||
Status s = XGetClassHint(display, window, &class_hint);
|
||||
bool result = false;
|
||||
if (s == 0) {
|
||||
// No hints, assume this is a normal application window.
|
||||
return result;
|
||||
}
|
||||
static const std::string gnome_panel("gnome-panel");
|
||||
static const std::string desktop_window("desktop_window");
|
||||
|
||||
if (gnome_panel.compare(class_hint.res_name) == 0 ||
|
||||
desktop_window.compare(class_hint.res_name) == 0) {
|
||||
result = true;
|
||||
}
|
||||
XFree(class_hint.res_name);
|
||||
XFree(class_hint.res_class);
|
||||
return result;
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::Init() {
|
||||
return enumerator_->Init();
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::GetWindowList(WindowDescriptionList* descriptions) {
|
||||
return enumerator_->EnumerateWindows(descriptions);
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::GetDesktopList(DesktopDescriptionList* descriptions) {
|
||||
return enumerator_->EnumerateDesktops(descriptions);
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::IsVisible(const WindowId& id) {
|
||||
return enumerator_->IsVisible(id);
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::MoveToFront(const WindowId& id) {
|
||||
return enumerator_->MoveToFront(id);
|
||||
}
|
||||
|
||||
|
||||
uint8* LinuxWindowPicker::GetWindowIcon(const WindowId& id, int* width,
|
||||
int* height) {
|
||||
return enumerator_->GetWindowIcon(id, width, height);
|
||||
}
|
||||
|
||||
uint8* LinuxWindowPicker::GetWindowThumbnail(const WindowId& id, int width,
|
||||
int height) {
|
||||
return enumerator_->GetWindowThumbnail(id, width, height);
|
||||
}
|
||||
|
||||
int LinuxWindowPicker::GetNumDesktops() {
|
||||
return enumerator_->GetNumDesktops();
|
||||
}
|
||||
|
||||
uint8* LinuxWindowPicker::GetDesktopThumbnail(const DesktopId& id,
|
||||
int width,
|
||||
int height) {
|
||||
return enumerator_->GetDesktopThumbnail(id, width, height);
|
||||
}
|
||||
|
||||
bool LinuxWindowPicker::GetDesktopDimensions(const DesktopId& id, int* width,
|
||||
int* height) {
|
||||
return enumerator_->GetDesktopDimensions(id, width, height);
|
||||
}
|
||||
|
||||
} // namespace rtc
|
||||
Reference in New Issue
Block a user