Extract MonitorInfoProvider from WindowSizer.

chrome/browser/ui/monitor_info_provider_win.cc

+// Copyright (c) 2011 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 "chrome/browser/ui/monitor_info_provider.h"
+
+#include <windows.h>
+
+#include "base/compiler_specific.h"
+
+namespace {
+
+class MonitorInfoProviderWin : public MonitorInfoProvider {
+ public:
+  MonitorInfoProviderWin();
+  virtual ~MonitorInfoProviderWin();
+
+  // Overridden from MonitorInfoProvider:
+  virtual gfx::Rect GetPrimaryMonitorWorkArea() const OVERRIDE;
+  virtual gfx::Rect GetPrimaryMonitorBounds() const OVERRIDE;
+  virtual gfx::Rect GetMonitorWorkAreaMatching(
+      const gfx::Rect& match_rect) const OVERRIDE;
+  virtual void UpdateWorkAreas() OVERRIDE;
+
+ private:
+  // A callback for EnumDisplayMonitors that records the work area of the
+  // current monitor in the enumeration.
+  static BOOL CALLBACK MonitorEnumProc(HMONITOR monitor,
+                                       HDC monitor_dc,
+                                       LPRECT monitor_rect,
+                                       LPARAM data);
+
+  static MONITORINFO GetMonitorInfoForMonitor(HMONITOR monitor);
+
+  DISALLOW_COPY_AND_ASSIGN(MonitorInfoProviderWin);
+};
+
+MonitorInfoProviderWin::MonitorInfoProviderWin() {
+}
+
+MonitorInfoProviderWin::~MonitorInfoProviderWin() {
+}
+
+gfx::Rect MonitorInfoProviderWin::GetPrimaryMonitorWorkArea() const {
+  return gfx::Rect(GetMonitorInfoForMonitor(MonitorFromWindow(NULL,
+      MONITOR_DEFAULTTOPRIMARY)).rcWork);
+}
+
+gfx::Rect MonitorInfoProviderWin::GetPrimaryMonitorBounds() const {
+  return gfx::Rect(GetMonitorInfoForMonitor(MonitorFromWindow(NULL,
+      MONITOR_DEFAULTTOPRIMARY)).rcMonitor);
+}
+
+gfx::Rect MonitorInfoProviderWin::GetMonitorWorkAreaMatching(
+    const gfx::Rect& match_rect) const {
+  RECT other_bounds_rect = match_rect.ToRECT();
+  MONITORINFO monitor_info = GetMonitorInfoForMonitor(MonitorFromRect(
+      &other_bounds_rect, MONITOR_DEFAULTTONEAREST));
+  return gfx::Rect(monitor_info.rcWork);
+}
+
+void MonitorInfoProviderWin::UpdateWorkAreas() {
+  work_areas_.clear();
+  EnumDisplayMonitors(NULL, NULL, &MonitorInfoProviderWin::MonitorEnumProc,
+                      reinterpret_cast<LPARAM>(&work_areas_));
+}
+
+// static
+BOOL CALLBACK MonitorInfoProviderWin::MonitorEnumProc(HMONITOR monitor,
+                                                      HDC monitor_dc,
+                                                      LPRECT monitor_rect,
+                                                      LPARAM data) {
+  reinterpret_cast<std::vector<gfx::Rect>*>(data)->push_back(
+      gfx::Rect(GetMonitorInfoForMonitor(monitor).rcWork));
+  return TRUE;
+}
+
+// static
+MONITORINFO MonitorInfoProviderWin::GetMonitorInfoForMonitor(HMONITOR monitor) {
+  MONITORINFO monitor_info = { 0 };
+  monitor_info.cbSize = sizeof(monitor_info);
+  GetMonitorInfo(monitor, &monitor_info);
+  return monitor_info;
+}
+
+}  // namespace
+
+// static
+MonitorInfoProvider* MonitorInfoProvider::Create() {
+  return new MonitorInfoProviderWin();
+}