display_info.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
1// Copyright (c) 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 <stdio.h>
6#include <string>
7#include <vector>
8
9#include "ash/display/display_info.h"
10#include "base/logging.h"
11#include "base/strings/string_number_conversions.h"
12#include "base/strings/string_util.h"
13#include "base/strings/stringprintf.h"
14#include "ui/gfx/display.h"
15#include "ui/gfx/size_conversions.h"
16#include "ui/gfx/size_f.h"
17
18#if defined(OS_WIN)
19#include "ui/aura/root_window_host.h"
20#endif
21
22namespace ash {
23namespace internal {
24
25// satic
26DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
27  return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
28}
29
30// static
31DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
32                                              int64 id) {
33  // Default bounds for a display.
34  const int kDefaultHostWindowX = 200;
35  const int kDefaultHostWindowY = 200;
36  const int kDefaultHostWindowWidth = 1366;
37  const int kDefaultHostWindowHeight = 768;
38
39  // Use larger than max int to catch overflow early.
40  static int64 synthesized_display_id = 2200000000LL;
41
42#if defined(OS_WIN)
43  gfx::Rect bounds_in_pixel(aura::RootWindowHost::GetNativeScreenSize());
44#else
45  gfx::Rect bounds_in_pixel(kDefaultHostWindowX, kDefaultHostWindowY,
46                            kDefaultHostWindowWidth, kDefaultHostWindowHeight);
47#endif
48  std::string main_spec = spec;
49
50  float ui_scale = 1.0f;
51  std::vector<std::string> parts;
52  if (Tokenize(main_spec, "@", &parts) == 2) {
53    double scale_in_double = 0;
54    if (base::StringToDouble(parts[1], &scale_in_double))
55      ui_scale = scale_in_double;
56    main_spec = parts[0];
57  }
58
59  size_t count = Tokenize(main_spec, "/", &parts);
60  gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
61  bool has_overscan = false;
62  if (count) {
63    main_spec = parts[0];
64    if (count >= 2) {
65      std::string options = parts[1];
66      for (size_t i = 0; i < options.size(); ++i) {
67        char c = options[i];
68        switch (c) {
69          case 'o':
70            has_overscan = true;
71            break;
72          case 'r':  // rotate 90 degrees to 'right'.
73            rotation = gfx::Display::ROTATE_90;
74            break;
75          case 'u':  // 180 degrees, 'u'pside-down.
76            rotation = gfx::Display::ROTATE_180;
77            break;
78          case 'l':  // rotate 90 degrees to 'left'.
79            rotation = gfx::Display::ROTATE_270;
80            break;
81        }
82      }
83    }
84  }
85
86  int x = 0, y = 0, width, height;
87  float device_scale_factor = 1.0f;
88  if (sscanf(main_spec.c_str(), "%dx%d*%f",
89             &width, &height, &device_scale_factor) >= 2 ||
90      sscanf(main_spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
91             &device_scale_factor) >= 4) {
92    bounds_in_pixel.SetRect(x, y, width, height);
93  }
94  if (id == gfx::Display::kInvalidDisplayID)
95    id = synthesized_display_id++;
96  DisplayInfo display_info(
97      id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
98  display_info.set_device_scale_factor(device_scale_factor);
99  display_info.set_rotation(rotation);
100  display_info.set_ui_scale(ui_scale);
101  display_info.SetBounds(bounds_in_pixel);
102
103  // To test the overscan, it creates the default 5% overscan.
104  if (has_overscan) {
105    int width = bounds_in_pixel.width() / device_scale_factor / 40;
106    int height = bounds_in_pixel.height() / device_scale_factor / 40;
107    display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
108    display_info.UpdateDisplaySize();
109  }
110
111  DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
112           << ", spec=" << spec;
113  return display_info;
114}
115
116DisplayInfo::DisplayInfo()
117    : id_(gfx::Display::kInvalidDisplayID),
118      has_overscan_(false),
119      rotation_(gfx::Display::ROTATE_0),
120      device_scale_factor_(1.0f),
121      overscan_insets_in_dip_(0, 0, 0, 0),
122      ui_scale_(1.0f),
123      native_(false) {
124}
125
126DisplayInfo::DisplayInfo(int64 id,
127                         const std::string& name,
128                         bool has_overscan)
129    : id_(id),
130      name_(name),
131      has_overscan_(has_overscan),
132      rotation_(gfx::Display::ROTATE_0),
133      device_scale_factor_(1.0f),
134      overscan_insets_in_dip_(0, 0, 0, 0),
135      ui_scale_(1.0f),
136      native_(false) {
137}
138
139DisplayInfo::~DisplayInfo() {
140}
141
142void DisplayInfo::Copy(const DisplayInfo& native_info) {
143  DCHECK(id_ == native_info.id_);
144  name_ = native_info.name_;
145  has_overscan_ = native_info.has_overscan_;
146
147  DCHECK(!native_info.bounds_in_pixel_.IsEmpty());
148  bounds_in_pixel_ = native_info.bounds_in_pixel_;
149  size_in_pixel_ = native_info.size_in_pixel_;
150  device_scale_factor_ = native_info.device_scale_factor_;
151
152  // Copy overscan_insets_in_dip_ if it's not empty. This is for test
153  // cases which use "/o" annotation which sets the overscan inset
154  // to native, and that overscan has to be propagated. This does not
155  // happen on the real environment.
156  if (!native_info.overscan_insets_in_dip_.empty())
157    overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
158
159  // Rotation_ and ui_scale_ are given by preference, or unit
160  // tests. Don't copy if this native_info came from
161  // DisplayChangeObserverX11.
162  if (!native_info.native()) {
163    rotation_ = native_info.rotation_;
164    ui_scale_ = native_info.ui_scale_;
165  }
166  // Don't copy insets as it may be given by preference.  |rotation_|
167  // is treated as a native so that it can be specified in
168  // |CreateFromSpec|.
169}
170
171void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_pixel) {
172  bounds_in_pixel_ = new_bounds_in_pixel;
173  size_in_pixel_ = new_bounds_in_pixel.size();
174  UpdateDisplaySize();
175}
176
177void DisplayInfo::UpdateDisplaySize() {
178  size_in_pixel_ = bounds_in_pixel_.size();
179  if (!overscan_insets_in_dip_.empty()) {
180    gfx::Insets insets_in_pixel =
181        overscan_insets_in_dip_.Scale(device_scale_factor_);
182    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
183  } else {
184    overscan_insets_in_dip_.Set(0, 0, 0, 0);
185  }
186
187  if (rotation_ == gfx::Display::ROTATE_90 ||
188      rotation_ == gfx::Display::ROTATE_270)
189    size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
190  gfx::SizeF size_f(size_in_pixel_);
191  size_f.Scale(ui_scale_);
192  size_in_pixel_ = gfx::ToFlooredSize(size_f);
193}
194
195void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
196  overscan_insets_in_dip_ = insets_in_dip;
197}
198
199gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
200  return overscan_insets_in_dip_.Scale(device_scale_factor_);
201}
202
203std::string DisplayInfo::ToString() const {
204  int rotation_degree = static_cast<int>(rotation_) * 90;
205  return base::StringPrintf(
206      "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
207      "overscan=%s, rotation=%d, ui-scale=%f",
208      static_cast<long long int>(id_),
209      bounds_in_pixel_.ToString().c_str(),
210      size_in_pixel_.ToString().c_str(),
211      device_scale_factor_,
212      overscan_insets_in_dip_.ToString().c_str(),
213      rotation_degree,
214      ui_scale_);
215}
216
217}  // namespace internal
218}  // namespace ash
219