ash/display/display_util.cc

   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 "ash/display/display_util.h"
   6
   7 #include <algorithm>
   8
   9 #include "ash/display/display_info.h"
  10 #include "ash/display/display_manager.h"
  11 #include "ash/host/ash_window_tree_host.h"
  12 #include "ash/shell.h"
  13 #include "ui/aura/env.h"
  14 #include "ui/aura/window_tree_host.h"
  15 #include "ui/gfx/geometry/point.h"
  16 #include "ui/gfx/geometry/rect.h"
  17 #include "ui/wm/core/coordinate_conversion.h"
  18
  19 #if defined(OS_CHROMEOS)
  20 #include "base/sys_info.h"
  21 #endif
  22
  23 namespace ash {
  24 namespace {
  25
  26 // List of value UI Scale values. Scales for 2x are equivalent to 640,
  27 // 800, 1024, 1280, 1440, 1600 and 1920 pixel width respectively on
  28 // 2560 pixel width 2x density display. Please see crbug.com/233375
  29 // for the full list of resolutions.
  30 const float kUIScalesFor2x[] =
  31     {0.5f, 0.625f, 0.8f, 1.0f, 1.125f, 1.25f, 1.5f, 2.0f};
  32 const float kUIScalesFor1_25x[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.25f };
  33 const float kUIScalesFor1280[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f };
  34 const float kUIScalesFor1366[] = {0.5f, 0.6f, 0.75f, 1.0f, 1.125f };
  35
  36 std::vector<float> GetScalesForDisplay(const DisplayMode& native_mode) {
  37 #define ASSIGN_ARRAY(v, a) v.assign(a, a + arraysize(a))
  38
  39   std::vector<float> ret;
  40   if (native_mode.device_scale_factor == 2.0f) {
  41     ASSIGN_ARRAY(ret, kUIScalesFor2x);
  42     return ret;
  43   } else if (native_mode.device_scale_factor == 1.25f) {
  44     ASSIGN_ARRAY(ret, kUIScalesFor1_25x);
  45     return ret;
  46   }
  47   switch (native_mode.size.width()) {
  48     case 1280:
  49       ASSIGN_ARRAY(ret, kUIScalesFor1280);
  50       break;
  51     case 1366:
  52       ASSIGN_ARRAY(ret, kUIScalesFor1366);
  53       break;
  54     default:
  55       ASSIGN_ARRAY(ret, kUIScalesFor1280);
  56 #if defined(OS_CHROMEOS)
  57       if (base::SysInfo::IsRunningOnChromeOS())
  58         NOTREACHED() << "Unknown resolution:" << native_mode.size.ToString();
  59 #endif
  60   }
  61   return ret;
  62 }
  63
  64 struct ScaleComparator {
  65   explicit ScaleComparator(float s) : scale(s) {}
  66
  67   bool operator()(const DisplayMode& mode) const {
  68     const float kEpsilon = 0.0001f;
  69     return std::abs(scale - mode.ui_scale) < kEpsilon;
  70   }
  71   float scale;
  72 };
  73
  74 void ConvertPointFromScreenToNative(aura::WindowTreeHost* host,
  75                                     gfx::Point* point) {
  76   ::wm::ConvertPointFromScreen(host->window(), point);
  77   host->ConvertPointToNativeScreen(point);
  78 }
  79
  80 }  // namespace
  81
  82 std::vector<DisplayMode> CreateInternalDisplayModeList(
  83     const DisplayMode& native_mode) {
  84   std::vector<DisplayMode> display_mode_list;
  85
  86   float native_ui_scale = (native_mode.device_scale_factor == 1.25f)
  87                               ? 1.0f
  88                               : native_mode.device_scale_factor;
  89   for (float ui_scale : GetScalesForDisplay(native_mode)) {
  90     DisplayMode mode = native_mode;
  91     mode.ui_scale = ui_scale;
  92     mode.native = (ui_scale == native_ui_scale);
  93     display_mode_list.push_back(mode);
  94   }
  95   return display_mode_list;
  96 }
  97
  98 // static
  99 float GetNextUIScale(const DisplayInfo& info, bool up) {
 100   ScaleComparator comparator(info.configured_ui_scale());
 101   const std::vector<DisplayMode>& modes = info.display_modes();
 102   for (auto iter = modes.begin(); iter != modes.end(); ++iter) {
 103     if (comparator(*iter)) {
 104       if (up && (iter + 1) != modes.end())
 105         return (iter + 1)->ui_scale;
 106       if (!up && iter != modes.begin())
 107         return (iter - 1)->ui_scale;
 108       return info.configured_ui_scale();
 109     }
 110   }
 111   // Fallback to 1.0f if the |scale| wasn't in the list.
 112   return 1.0f;
 113 }
 114
 115 bool HasDisplayModeForUIScale(const DisplayInfo& info, float ui_scale) {
 116   ScaleComparator comparator(ui_scale);
 117   const std::vector<DisplayMode>& modes = info.display_modes();
 118   return std::find_if(modes.begin(), modes.end(), comparator) != modes.end();
 119 }
 120
 121 void ComputeBoundary(const gfx::Display& primary_display,
 122                      const gfx::Display& secondary_display,
 123                      DisplayLayout::Position position,
 124                      gfx::Rect* primary_edge_in_screen,
 125                      gfx::Rect* secondary_edge_in_screen) {
 126   const gfx::Rect& primary = primary_display.bounds();
 127   const gfx::Rect& secondary = secondary_display.bounds();
 128   switch (position) {
 129     case DisplayLayout::TOP:
 130     case DisplayLayout::BOTTOM: {
 131       int left = std::max(primary.x(), secondary.x());
 132       int right = std::min(primary.right(), secondary.right());
 133       if (position == DisplayLayout::TOP) {
 134         primary_edge_in_screen->SetRect(left, primary.y(), right - left, 1);
 135         secondary_edge_in_screen->SetRect(left, secondary.bottom() - 1,
 136                                           right - left, 1);
 137       } else {
 138         primary_edge_in_screen->SetRect(left, primary.bottom() - 1,
 139                                         right - left, 1);
 140         secondary_edge_in_screen->SetRect(left, secondary.y(), right - left, 1);
 141       }
 142       break;
 143     }
 144     case DisplayLayout::LEFT:
 145     case DisplayLayout::RIGHT: {
 146       int top = std::max(primary.y(), secondary.y());
 147       int bottom = std::min(primary.bottom(), secondary.bottom());
 148       if (position == DisplayLayout::LEFT) {
 149         primary_edge_in_screen->SetRect(primary.x(), top, 1, bottom - top);
 150         secondary_edge_in_screen->SetRect(secondary.right() - 1, top, 1,
 151                                           bottom - top);
 152       } else {
 153         primary_edge_in_screen->SetRect(primary.right() - 1, top, 1,
 154                                         bottom - top);
 155         secondary_edge_in_screen->SetRect(secondary.y(), top, 1, bottom - top);
 156       }
 157       break;
 158     }
 159   }
 160 }
 161
 162 gfx::Rect GetNativeEdgeBounds(AshWindowTreeHost* ash_host,
 163                               const gfx::Rect& bounds_in_screen) {
 164   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
 165   gfx::Rect native_bounds = host->GetBounds();
 166   native_bounds.Inset(ash_host->GetHostInsets());
 167   gfx::Point start_in_native = bounds_in_screen.origin();
 168   gfx::Point end_in_native = bounds_in_screen.bottom_right();
 169
 170   ConvertPointFromScreenToNative(host, &start_in_native);
 171   ConvertPointFromScreenToNative(host, &end_in_native);
 172
 173   if (std::abs(start_in_native.x() - end_in_native.x()) <
 174       std::abs(start_in_native.y() - end_in_native.y())) {
 175     // vertical in native
 176     int x = std::abs(native_bounds.x() - start_in_native.x()) <
 177                     std::abs(native_bounds.right() - start_in_native.x())
 178                 ? native_bounds.x()
 179                 : native_bounds.right() - 1;
 180     return gfx::Rect(x, std::min(start_in_native.y(), end_in_native.y()), 1,
 181                      std::abs(end_in_native.y() - start_in_native.y()));
 182   } else {
 183     // horizontal in native
 184     int y = std::abs(native_bounds.y() - start_in_native.y()) <
 185                     std::abs(native_bounds.bottom() - start_in_native.y())
 186                 ? native_bounds.y()
 187                 : native_bounds.bottom() - 1;
 188     return gfx::Rect(std::min(start_in_native.x(), end_in_native.x()), y,
 189                      std::abs(end_in_native.x() - start_in_native.x()), 1);
 190   }
 191 }
 192
 193 // Moves the cursor to the point inside the root that is closest to
 194 // the point_in_screen, which is outside of the root window.
 195 void MoveCursorTo(AshWindowTreeHost* ash_host,
 196                   const gfx::Point& point_in_screen,
 197                   bool update_last_location_now) {
 198   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
 199   gfx::Point point_in_native = point_in_screen;
 200   ::wm::ConvertPointFromScreen(host->window(), &point_in_native);
 201   host->ConvertPointToNativeScreen(&point_in_native);
 202
 203   // now fit the point inside the native bounds.
 204   gfx::Rect native_bounds = host->GetBounds();
 205   gfx::Point native_origin = native_bounds.origin();
 206   native_bounds.Inset(ash_host->GetHostInsets());
 207   // Shrink further so that the mouse doesn't warp on the
 208   // edge. The right/bottom needs to be shrink by 2 to subtract
 209   // the 1 px from width/height value.
 210   native_bounds.Inset(1, 1, 2, 2);
 211
 212   // Ensure that |point_in_native| is inside the |native_bounds|.
 213   point_in_native.SetToMax(native_bounds.origin());
 214   point_in_native.SetToMin(native_bounds.bottom_right());
 215
 216   gfx::Point point_in_host = point_in_native;
 217
 218   point_in_host.Offset(-native_origin.x(), -native_origin.y());
 219   host->MoveCursorToHostLocation(point_in_host);
 220
 221   if (update_last_location_now) {
 222     gfx::Point new_point_in_screen = point_in_native;
 223     if (Shell::GetInstance()->display_manager()->IsInUnifiedMode()) {
 224       // TODO(oshima): Do not use ConvertPointFromNativeScreen because
 225       // the mirroring display has a transform that should not be applied here.
 226       gfx::Point origin = host->GetBounds().origin();
 227       new_point_in_screen.Offset(-origin.x(), -origin.y());
 228     } else {
 229       host->ConvertPointFromNativeScreen(&new_point_in_screen);
 230     }
 231     ::wm::ConvertPointToScreen(host->window(), &new_point_in_screen);
 232     aura::Env::GetInstance()->set_last_mouse_location(new_point_in_screen);
 233   }
 234 }
 235
 236 int FindDisplayIndexContainingPoint(const std::vector<gfx::Display>& displays,
 237                                     const gfx::Point& point_in_screen) {
 238   auto iter = std::find_if(displays.begin(), displays.end(),
 239                            [point_in_screen](const gfx::Display& display) {
 240                              return display.bounds().Contains(point_in_screen);
 241                            });
 242   return iter == displays.end() ? -1 : (iter - displays.begin());
 243 }
 244
 245 }  // namespace ash