ash/display/display_info.cc

   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
  22 namespace ash {
  23 namespace internal {
  24
  25 // satic
  26 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
  27   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
  28 }
  29
  30 // static
  31 DisplayInfo 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
 116 DisplayInfo::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
 126 DisplayInfo::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
 139 DisplayInfo::~DisplayInfo() {
 140 }
 141
 142 void 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
 171 void 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
 177 void 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
 195 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 196   overscan_insets_in_dip_ = insets_in_dip;
 197 }
 198
 199 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 200   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 201 }
 202
 203 std::string DisplayInfo::ToString() const {
 204   int rotation_degree = static_cast<int>(rotation_) * 90;
 205   return base::StringPrintf(
 206       "DisplayInfo[%lld] 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