MultiMonitor support

ash/monitor/multi_monitor_manager.cc

Index: ash/monitor/multi_monitor_manager.cc
diff --git a/ash/monitor/multi_monitor_manager.cc b/ash/monitor/multi_monitor_manager.cc
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+++ b/ash/monitor/multi_monitor_manager.cc
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+// Copyright (c) 2012 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 "ash/monitor/multi_monitor_manager.h"
+
+#include <string>
+#include <vector>
+
+#include "base/command_line.h"
+#include "base/stl_util.h"
+#include "base/string_split.h"
+#include "ui/aura/aura_switches.h"
+#include "ui/aura/env.h"
+#include "ui/aura/monitor.h"
+#include "ui/aura/root_window.h"
+#include "ui/aura/root_window_host.h"
+#include "ui/gfx/rect.h"
+#include "ui/aura/window_property.h"
+
+DECLARE_WINDOW_PROPERTY_TYPE(aura::Monitor*);
+
+namespace ash {
+namespace internal {
+
+DEFINE_WINDOW_PROPERTY_KEY(aura::Monitor*, kMonitorKey, NULL);
+
+using std::string;
+using std::vector;
+using aura::Monitor;
+using aura::RootWindow;
+using aura::Window;
+
+MultiMonitorManager::MultiMonitorManager() {
+  Init();
+}
+
+MultiMonitorManager::~MultiMonitorManager() {
+  STLDeleteContainerPointers(monitors_.begin(), monitors_.end());
+}
+
+void MultiMonitorManager::OnNativeMonitorResized(const gfx::Size& size) {
+  // TODO(oshima): Update monitors using xrandr and notify observers
+  // Just update the primary for now.
+  if (use_fullscreen_host_window()) {
+    Monitor* monitor =
+        aura::Env::GetInstance()->monitor_manager()->GetMonitorAt(0);
+    monitor->set_size(size);
+    NotifyBoundsChanged(monitor);
+  }
+}
+
+RootWindow* MultiMonitorManager::CreateRootWindowForMonitor(
+    Monitor* monitor) {
+  RootWindow* root_window = new RootWindow(monitor->bounds());
+  root_window->AddObserver(this);
+  root_window->SetProperty(kMonitorKey, monitor);
+  return root_window;
+}
+
+const Monitor* MultiMonitorManager::GetMonitorNearestWindow(
+    const Window* window) const {
+  if (!window) {
+    MultiMonitorManager* manager = const_cast<MultiMonitorManager*>(this);
+    return manager->GetMonitorAt(0);
+  }
+  const RootWindow* root = window->GetRootWindow();
+  return root ? root->GetProperty(kMonitorKey) : NULL;
+}
+
+const Monitor* MultiMonitorManager::GetMonitorNearestPoint(
+    const gfx::Point& point) const {
+  // TODO(oshima): For m19, mouse is constrained within
+  // the primary window.
+  MultiMonitorManager* manager = const_cast<MultiMonitorManager*>(this);
+  return manager->GetMonitorAt(0);
+}
+
+Monitor* MultiMonitorManager::GetMonitorAt(size_t index) {
+  return index < monitors_.size() ? monitors_[index] : NULL;
+}
+
+size_t MultiMonitorManager::GetNumMonitors() const {
+  return monitors_.size();
+}
+
+Monitor* MultiMonitorManager::GetMonitorNearestWindow(const Window* window) {
+  const MonitorManager* manager = this;
+  return const_cast<Monitor*>(manager->GetMonitorNearestWindow(window));
+}
+
+void MultiMonitorManager::OnWindowBoundsChanged(
+    Window* window, const gfx::Rect& bounds) {
+  if (!use_fullscreen_host_window()) {
+    Monitor* monitor = window->GetProperty(kMonitorKey);
+    monitor->set_size(bounds.size());
+    NotifyBoundsChanged(monitor);
+  }
+}
+
+void MultiMonitorManager::OnWindowDestroying(Window* window) {
+  Monitor* monitor = window->GetProperty(kMonitorKey);
+  monitors_.erase(std::find(monitors_.begin(), monitors_.end(), monitor));
+  delete monitor;
+}
+
+void MultiMonitorManager::Init() {
+  const string size_str = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+      switches::kAuraHostWindowSize);
+  vector<string> parts;
+  base::SplitString(size_str, ',', &parts);
+  for (vector<string>::const_iterator iter = parts.begin();
+       iter != parts.end(); ++iter) {
+    monitors_.push_back(CreateMonitorFromSpec(*iter));
+  }
+  if (monitors_.empty())
+    monitors_.push_back(CreateMonitorFromSpec("" /* default */));
+}
+
+}  // namespace internal
+}  // namespace ash