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// 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 "remoting/host/single_window_input_injector.h"
#include <ApplicationServices/ApplicationServices.h>
#include <Carbon/Carbon.h>
#include <utility>
#include "base/mac/foundation_util.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/macros.h"
#include "remoting/proto/event.pb.h"
#include "third_party/webrtc/modules/desktop_capture/mac/desktop_configuration.h"
namespace remoting {
using protocol::ClipboardEvent;
using protocol::KeyEvent;
using protocol::TextEvent;
using protocol::MouseEvent;
using protocol::TouchEvent;
class SingleWindowInputInjectorMac : public SingleWindowInputInjector {
public:
SingleWindowInputInjectorMac(
webrtc::WindowId window_id,
scoped_ptr<InputInjector> input_injector);
~SingleWindowInputInjectorMac() override;
// InputInjector interface.
void Start(scoped_ptr<protocol::ClipboardStub> client_clipboard) override;
void InjectKeyEvent(const KeyEvent& event) override;
void InjectTextEvent(const TextEvent& event) override;
void InjectMouseEvent(const MouseEvent& event) override;
void InjectTouchEvent(const TouchEvent& event) override;
void InjectClipboardEvent(const ClipboardEvent& event) override;
private:
CGRect FindCGRectOfWindow();
CGWindowID window_id_;
scoped_ptr<InputInjector> input_injector_;
DISALLOW_COPY_AND_ASSIGN(SingleWindowInputInjectorMac);
};
SingleWindowInputInjectorMac::SingleWindowInputInjectorMac(
webrtc::WindowId window_id,
scoped_ptr<InputInjector> input_injector)
: window_id_(static_cast<CGWindowID>(window_id)),
input_injector_(std::move(input_injector)) {}
SingleWindowInputInjectorMac::~SingleWindowInputInjectorMac() {}
void SingleWindowInputInjectorMac::Start(
scoped_ptr<protocol::ClipboardStub> client_clipboard) {
input_injector_->Start(std::move(client_clipboard));
}
void SingleWindowInputInjectorMac::InjectKeyEvent(const KeyEvent& event) {
input_injector_->InjectKeyEvent(event);
}
void SingleWindowInputInjectorMac::InjectTextEvent(const TextEvent& event) {
input_injector_->InjectTextEvent(event);
}
void SingleWindowInputInjectorMac::InjectMouseEvent(const MouseEvent& event) {
if (event.has_x() && event.has_y()) {
CGRect window_rect = FindCGRectOfWindow();
if (CGRectIsNull(window_rect)) {
LOG(ERROR) << "Window rect is null, so forwarding unmodified MouseEvent";
input_injector_->InjectMouseEvent(event);
return;
}
webrtc::MacDesktopConfiguration desktop_config =
webrtc::MacDesktopConfiguration::GetCurrent(
webrtc::MacDesktopConfiguration::TopLeftOrigin);
// Create a vector that has the origin of the window.
webrtc::DesktopVector window_pos(window_rect.origin.x,
window_rect.origin.y);
// The underlying InputInjector expects coordinates relative to the
// top-left of the top-left-most monitor, so translate the window origin
// to that coordinate scheme.
window_pos.subtract(
webrtc::DesktopVector(desktop_config.pixel_bounds.left(),
desktop_config.pixel_bounds.top()));
// We must make sure we are taking into account the fact that when we
// find the window on the host it returns its coordinates in Density
// Independent coordinates. We have to convert to Density Dependent
// because InputInjector assumes Density Dependent coordinates in the
// MouseEvent.
window_pos.set(window_pos.x() * desktop_config.dip_to_pixel_scale,
window_pos.y() * desktop_config.dip_to_pixel_scale);
// Create a new event with coordinates that are in respect to the window.
MouseEvent modified_event(event);
modified_event.set_x(event.x() + window_pos.x());
modified_event.set_y(event.y() + window_pos.y());
input_injector_->InjectMouseEvent(modified_event);
} else {
input_injector_->InjectMouseEvent(event);
}
}
void SingleWindowInputInjectorMac::InjectTouchEvent(const TouchEvent& event) {
NOTIMPLEMENTED();
}
void SingleWindowInputInjectorMac::InjectClipboardEvent(
const ClipboardEvent& event) {
input_injector_->InjectClipboardEvent(event);
}
// This method finds the rectangle of the window we are streaming using
// |window_id_|. The InputInjector can then use this rectangle
// to translate the input event to coordinates of the window rather
// than the screen.
CGRect SingleWindowInputInjectorMac::FindCGRectOfWindow() {
CGRect rect;
CGWindowID ids[1] = {window_id_};
base::ScopedCFTypeRef<CFArrayRef> window_id_array(
CFArrayCreate(nullptr, reinterpret_cast<const void**>(&ids), 1, nullptr));
base::ScopedCFTypeRef<CFArrayRef> window_array(
CGWindowListCreateDescriptionFromArray(window_id_array));
if (window_array == nullptr || CFArrayGetCount(window_array) == 0) {
// Could not find the window. It might have been closed.
LOG(ERROR) << "Specified window to stream not found for id: "
<< window_id_;
return CGRectNull;
}
// We don't use ScopedCFTypeRef for |window_array| because the
// CFDictionaryRef returned by CFArrayGetValueAtIndex is owned by
// window_array. The same is true of the |bounds|.
CFDictionaryRef window =
base::mac::CFCast<CFDictionaryRef>(
CFArrayGetValueAtIndex(window_array, 0));
if (CFDictionaryContainsKey(window, kCGWindowBounds)) {
CFDictionaryRef bounds =
base::mac::GetValueFromDictionary<CFDictionaryRef>(
window, kCGWindowBounds);
if (bounds) {
if (CGRectMakeWithDictionaryRepresentation(bounds, &rect)) {
return rect;
}
}
}
return CGRectNull;
}
scoped_ptr<InputInjector> SingleWindowInputInjector::CreateForWindow(
webrtc::WindowId window_id,
scoped_ptr<InputInjector> input_injector) {
return make_scoped_ptr(
new SingleWindowInputInjectorMac(window_id, std::move(input_injector)));
}
} // namespace remoting
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