1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/extensions/display_info_provider_win.h"
6
7#include <windows.h>
8
9#include "base/hash.h"
10#include "base/strings/string_number_conversions.h"
11#include "base/strings/utf_string_conversions.h"
12#include "base/win/win_util.h"
13#include "extensions/common/api/system_display.h"
14#include "ui/gfx/screen.h"
15#include "ui/gfx/size.h"
16#include "ui/gfx/win/dpi.h"
17
18namespace extensions {
19
20using core_api::system_display::DisplayUnitInfo;
21
22namespace {
23
24BOOL CALLBACK
25EnumMonitorCallback(HMONITOR monitor, HDC hdc, LPRECT rect, LPARAM data) {
26  DisplayInfo* all_displays = reinterpret_cast<DisplayInfo*>(data);
27  DCHECK(all_displays);
28
29  linked_ptr<DisplayUnitInfo> unit(new DisplayUnitInfo);
30
31  MONITORINFOEX monitor_info;
32  ZeroMemory(&monitor_info, sizeof(MONITORINFOEX));
33  monitor_info.cbSize = sizeof(monitor_info);
34  GetMonitorInfo(monitor, &monitor_info);
35
36  DISPLAY_DEVICE device;
37  device.cb = sizeof(device);
38  if (!EnumDisplayDevices(monitor_info.szDevice, 0, &device, 0))
39    return FALSE;
40
41  gfx::Size dpi(gfx::GetDPI());
42  unit->id =
43      base::Int64ToString(base::Hash(base::WideToUTF8(monitor_info.szDevice)));
44  unit->name = base::WideToUTF8(device.DeviceString);
45  unit->dpi_x = dpi.width();
46  unit->dpi_y = dpi.height();
47  all_displays->push_back(unit);
48
49  return TRUE;
50}
51
52}  // namespace
53
54DisplayInfoProviderWin::DisplayInfoProviderWin() {
55}
56
57DisplayInfoProviderWin::~DisplayInfoProviderWin() {
58}
59
60bool DisplayInfoProviderWin::SetInfo(
61    const std::string& display_id,
62    const core_api::system_display::DisplayProperties& info,
63    std::string* error) {
64  *error = "Not implemented";
65  return false;
66}
67
68void DisplayInfoProviderWin::UpdateDisplayUnitInfoForPlatform(
69    const gfx::Display& display,
70    extensions::core_api::system_display::DisplayUnitInfo* unit) {
71  DisplayInfo all_displays;
72  EnumDisplayMonitors(
73      NULL, NULL, EnumMonitorCallback, reinterpret_cast<LPARAM>(&all_displays));
74  for (size_t i = 0; i < all_displays.size(); ++i) {
75    if (unit->id == all_displays[i]->id) {
76      unit->name = all_displays[i]->name;
77      unit->dpi_x = all_displays[i]->dpi_x;
78      unit->dpi_y = all_displays[i]->dpi_y;
79      break;
80    }
81  }
82}
83
84gfx::Screen* DisplayInfoProviderWin::GetActiveScreen() {
85  // TODO(scottmg): native screen is wrong http://crbug.com/133312
86  return gfx::Screen::GetNativeScreen();
87}
88
89// static
90DisplayInfoProvider* DisplayInfoProvider::Create() {
91  return new DisplayInfoProviderWin();
92}
93
94}  // namespace extensions
95