1 // Copyright 2013 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/api/system_display/display_info_provider.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 "ui/gfx/size.h"
14 #include "ui/gfx/win/dpi.h"
15
16 namespace extensions {
17
18 using api::system_display::DisplayUnitInfo;
19
20 namespace {
21
EnumMonitorCallback(HMONITOR monitor,HDC hdc,LPRECT rect,LPARAM data)22 BOOL CALLBACK EnumMonitorCallback(HMONITOR monitor,
23 HDC hdc,
24 LPRECT rect,
25 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 = base::Int64ToString(
43 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
SetInfo(const std::string & display_id,const api::system_display::DisplayProperties & info,std::string * error)54 bool DisplayInfoProvider::SetInfo(const std::string& display_id,
55 const api::system_display::DisplayProperties& info,
56 std::string* error) {
57 *error = "Not implemented";
58 return false;
59 }
60
UpdateDisplayUnitInfoForPlatform(const gfx::Display & display,extensions::api::system_display::DisplayUnitInfo * unit)61 void DisplayInfoProvider::UpdateDisplayUnitInfoForPlatform(
62 const gfx::Display& display,
63 extensions::api::system_display::DisplayUnitInfo* unit) {
64 DisplayInfo all_displays;
65 EnumDisplayMonitors(NULL, NULL, EnumMonitorCallback,
66 reinterpret_cast<LPARAM>(&all_displays));
67 for (size_t i = 0; i < all_displays.size(); ++i) {
68 if (unit->id == all_displays[i]->id) {
69 unit->name = all_displays[i]->name;
70 unit->dpi_x = all_displays[i]->dpi_x;
71 unit->dpi_y = all_displays[i]->dpi_y;
72 break;
73 }
74 }
75 }
76
77 } // namespace extensions
78