components/view_manager/display_manager.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 "components/view_manager/display_manager.h"
   6
   7 #include "base/numerics/safe_conversions.h"
   8 #include "cc/output/compositor_frame.h"
   9 #include "cc/output/delegated_frame_data.h"
  10 #include "cc/quads/render_pass.h"
  11 #include "cc/quads/shared_quad_state.h"
  12 #include "cc/quads/surface_draw_quad.h"
  13 #include "components/view_manager/display_manager_factory.h"
  14 #include "components/view_manager/gles2/gpu_state.h"
  15 #include "components/view_manager/public/interfaces/gpu.mojom.h"
  16 #include "components/view_manager/public/interfaces/quads.mojom.h"
  17 #include "components/view_manager/server_view.h"
  18 #include "components/view_manager/surfaces/surfaces_state.h"
  19 #include "components/view_manager/view_coordinate_conversions.h"
  20 #include "mojo/application/public/cpp/application_connection.h"
  21 #include "mojo/application/public/cpp/application_impl.h"
  22 #include "mojo/converters/geometry/geometry_type_converters.h"
  23 #include "mojo/converters/input_events/input_events_type_converters.h"
  24 #include "mojo/converters/input_events/mojo_extended_key_event_data.h"
  25 #include "mojo/converters/surfaces/surfaces_type_converters.h"
  26 #include "mojo/converters/surfaces/surfaces_utils.h"
  27 #include "mojo/converters/transform/transform_type_converters.h"
  28 #include "third_party/skia/include/core/SkXfermode.h"
  29 #include "ui/events/event.h"
  30 #include "ui/events/event_utils.h"
  31 #include "ui/gfx/display.h"
  32 #include "ui/platform_window/platform_ime_controller.h"
  33 #include "ui/platform_window/platform_window.h"
  34 #include "ui/platform_window/stub/stub_window.h"
  35
  36 #if defined(OS_WIN)
  37 #include "ui/platform_window/win/win_window.h"
  38 #elif defined(USE_X11)
  39 #include "ui/platform_window/x11/x11_window.h"
  40 #elif defined(OS_ANDROID)
  41 #include "ui/platform_window/android/platform_window_android.h"
  42 #endif
  43
  44 using mojo::Rect;
  45 using mojo::Size;
  46
  47 namespace view_manager {
  48 namespace {
  49
  50 void DrawViewTree(cc::RenderPass* pass,
  51                   const ServerView* view,
  52                   const gfx::Vector2d& parent_to_root_origin_offset,
  53                   float opacity) {
  54   if (!view->visible())
  55     return;
  56
  57   const gfx::Rect absolute_bounds =
  58       view->bounds() + parent_to_root_origin_offset;
  59   std::vector<const ServerView*> children(view->GetChildren());
  60   const float combined_opacity = opacity * view->opacity();
  61   for (std::vector<const ServerView*>::reverse_iterator it = children.rbegin();
  62        it != children.rend();
  63        ++it) {
  64     DrawViewTree(pass, *it, absolute_bounds.OffsetFromOrigin(),
  65                  combined_opacity);
  66   }
  67
  68   gfx::Transform quad_to_target_transform;
  69   quad_to_target_transform.Translate(absolute_bounds.x(), absolute_bounds.y());
  70   const gfx::Rect bounds_at_origin(view->bounds().size());
  71   cc::SharedQuadState* sqs = pass->CreateAndAppendSharedQuadState();
  72   // TODO(fsamuel): These clipping and visible rects are incorrect. They need
  73   // to be populated from CompositorFrame structs.
  74   sqs->SetAll(quad_to_target_transform,
  75               bounds_at_origin.size() /* layer_bounds */,
  76               bounds_at_origin /* visible_layer_bounds */,
  77               bounds_at_origin /* clip_rect */,
  78               false /* is_clipped */,
  79               view->opacity(),
  80               SkXfermode::kSrc_Mode,
  81               0 /* sorting-context_id */);
  82
  83   auto surface_quad =
  84       pass->CreateAndAppendDrawQuad<cc::SurfaceDrawQuad>();
  85   surface_quad->SetNew(sqs,
  86                        bounds_at_origin /* rect */,
  87                        bounds_at_origin /* visible_rect */,
  88                        view->surface_id());
  89 }
  90
  91 float ConvertUIWheelValueToMojoValue(int offset) {
  92   // Mojo's event type takes a value between -1 and 1. Normalize by allowing
  93   // up to 20 of ui's offset. This is a bit arbitrary.
  94   return std::max(
  95       -1.0f, std::min(1.0f, static_cast<float>(offset) /
  96                                 (20 * static_cast<float>(
  97                                           ui::MouseWheelEvent::kWheelDelta))));
  98 }
  99
 100 }  // namespace
 101
 102 // static
 103 DisplayManagerFactory* DisplayManager::factory_ = nullptr;
 104
 105 // static
 106 DisplayManager* DisplayManager::Create(
 107     bool is_headless,
 108     mojo::ApplicationImpl* app_impl,
 109     const scoped_refptr<gles2::GpuState>& gpu_state,
 110     const scoped_refptr<surfaces::SurfacesState>& surfaces_state) {
 111   if (factory_) {
 112     return factory_->CreateDisplayManager(is_headless, app_impl, gpu_state,
 113                                           surfaces_state);
 114   }
 115   return new DefaultDisplayManager(is_headless, app_impl, gpu_state,
 116                                    surfaces_state);
 117 }
 118
 119 DefaultDisplayManager::DefaultDisplayManager(
 120     bool is_headless,
 121     mojo::ApplicationImpl* app_impl,
 122     const scoped_refptr<gles2::GpuState>& gpu_state,
 123     const scoped_refptr<surfaces::SurfacesState>& surfaces_state)
 124     : is_headless_(is_headless),
 125       app_impl_(app_impl),
 126       gpu_state_(gpu_state),
 127       surfaces_state_(surfaces_state),
 128       delegate_(nullptr),
 129       draw_timer_(false, false),
 130       frame_pending_(false) {
 131   metrics_.size_in_pixels = mojo::Size::New();
 132   metrics_.size_in_pixels->width = 800;
 133   metrics_.size_in_pixels->height = 600;
 134 }
 135
 136 void DefaultDisplayManager::Init(DisplayManagerDelegate* delegate) {
 137   delegate_ = delegate;
 138
 139   gfx::Rect bounds(metrics_.size_in_pixels.To<gfx::Size>());
 140   if (is_headless_) {
 141     platform_window_.reset(new ui::StubWindow(this));
 142   } else {
 143 #if defined(OS_WIN)
 144     platform_window_.reset(new ui::WinWindow(this, bounds));
 145 #elif defined(USE_X11)
 146     platform_window_.reset(new ui::X11Window(this));
 147 #elif defined(OS_ANDROID)
 148     platform_window_.reset(new ui::PlatformWindowAndroid(this));
 149 #else
 150     NOTREACHED() << "Unsupported platform";
 151 #endif
 152   }
 153   platform_window_->SetBounds(bounds);
 154   platform_window_->Show();
 155 }
 156
 157 DefaultDisplayManager::~DefaultDisplayManager() {
 158   // Destroy the PlatformWindow early on as it may call us back during
 159   // destruction and we want to be in a known state. But destroy the surface
 160   // first because it can still be using the platform window.
 161   top_level_display_client_.reset();
 162   platform_window_.reset();
 163 }
 164
 165 void DefaultDisplayManager::SchedulePaint(const ServerView* view,
 166                                           const gfx::Rect& bounds) {
 167   DCHECK(view);
 168   if (!view->IsDrawn())
 169     return;
 170   const gfx::Rect root_relative_rect =
 171       ConvertRectBetweenViews(view, delegate_->GetRootView(), bounds);
 172   if (root_relative_rect.IsEmpty())
 173     return;
 174   dirty_rect_.Union(root_relative_rect);
 175   WantToDraw();
 176 }
 177
 178 void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
 179   platform_window_->SetBounds(gfx::Rect(size));
 180 }
 181
 182 void DefaultDisplayManager::SetTitle(const base::string16& title) {
 183   platform_window_->SetTitle(title);
 184 }
 185
 186 const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
 187   return metrics_;
 188 }
 189
 190 void DefaultDisplayManager::UpdateTextInputState(
 191     const ui::TextInputState& state) {
 192   ui::PlatformImeController* ime = platform_window_->GetPlatformImeController();
 193   if (ime)
 194     ime->UpdateTextInputState(state);
 195 }
 196
 197 void DefaultDisplayManager::SetImeVisibility(bool visible) {
 198   ui::PlatformImeController* ime = platform_window_->GetPlatformImeController();
 199   if (ime)
 200     ime->SetImeVisibility(visible);
 201 }
 202
 203 void DefaultDisplayManager::Draw() {
 204   if (!delegate_->GetRootView()->visible())
 205     return;
 206
 207   scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
 208   render_pass->damage_rect = dirty_rect_;
 209   render_pass->output_rect = gfx::Rect(metrics_.size_in_pixels.To<gfx::Size>());
 210
 211   DrawViewTree(render_pass.get(),
 212                delegate_->GetRootView(),
 213                gfx::Vector2d(), 1.0f);
 214
 215   scoped_ptr<cc::DelegatedFrameData> frame_data(new cc::DelegatedFrameData);
 216   frame_data->device_scale_factor = 1.f;
 217   frame_data->render_pass_list.push_back(render_pass.Pass());
 218
 219   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
 220   frame->delegated_frame_data = frame_data.Pass();
 221   frame_pending_ = true;
 222   if (top_level_display_client_) {
 223     top_level_display_client_->SubmitCompositorFrame(
 224         frame.Pass(),
 225         base::Bind(&DefaultDisplayManager::DidDraw, base::Unretained(this)));
 226   }
 227   dirty_rect_ = gfx::Rect();
 228 }
 229
 230 void DefaultDisplayManager::DidDraw() {
 231   frame_pending_ = false;
 232   if (!dirty_rect_.IsEmpty())
 233     WantToDraw();
 234 }
 235
 236 void DefaultDisplayManager::WantToDraw() {
 237   if (draw_timer_.IsRunning() || frame_pending_)
 238     return;
 239
 240   draw_timer_.Start(
 241       FROM_HERE, base::TimeDelta(),
 242       base::Bind(&DefaultDisplayManager::Draw, base::Unretained(this)));
 243 }
 244
 245 void DefaultDisplayManager::UpdateMetrics(const gfx::Size& size,
 246                                           float device_pixel_ratio) {
 247   if (gfx::Display::HasForceDeviceScaleFactor())
 248     device_pixel_ratio = gfx::Display::GetForcedDeviceScaleFactor();
 249   if (metrics_.size_in_pixels.To<gfx::Size>() == size &&
 250       metrics_.device_pixel_ratio == device_pixel_ratio)
 251     return;
 252   mojo::ViewportMetrics old_metrics;
 253   old_metrics.size_in_pixels = metrics_.size_in_pixels.Clone();
 254   old_metrics.device_pixel_ratio = metrics_.device_pixel_ratio;
 255
 256   metrics_.size_in_pixels = mojo::Size::From(size);
 257   metrics_.device_pixel_ratio = device_pixel_ratio;
 258
 259   delegate_->OnViewportMetricsChanged(old_metrics, metrics_);
 260 }
 261
 262 void DefaultDisplayManager::OnBoundsChanged(const gfx::Rect& new_bounds) {
 263   UpdateMetrics(new_bounds.size(), metrics_.device_pixel_ratio);
 264 }
 265
 266 void DefaultDisplayManager::OnDamageRect(const gfx::Rect& damaged_region) {
 267   dirty_rect_.Union(damaged_region);
 268   WantToDraw();
 269 }
 270
 271 void DefaultDisplayManager::DispatchEvent(ui::Event* event) {
 272   mojo::EventPtr mojo_event(mojo::Event::From(*event));
 273   if (event->IsMouseWheelEvent()) {
 274     // Mojo's event type has a different meaning for wheel events. Convert
 275     // between the two.
 276     ui::MouseWheelEvent* wheel_event =
 277         static_cast<ui::MouseWheelEvent*>(event);
 278     DCHECK(mojo_event->pointer_data);
 279     mojo_event->pointer_data->horizontal_wheel =
 280         ConvertUIWheelValueToMojoValue(wheel_event->x_offset());
 281     mojo_event->pointer_data->horizontal_wheel =
 282         ConvertUIWheelValueToMojoValue(wheel_event->y_offset());
 283   }
 284   delegate_->OnEvent(mojo_event.Pass());
 285
 286   switch (event->type()) {
 287     case ui::ET_MOUSE_PRESSED:
 288     case ui::ET_TOUCH_PRESSED:
 289       platform_window_->SetCapture();
 290       break;
 291     case ui::ET_MOUSE_RELEASED:
 292     case ui::ET_TOUCH_RELEASED:
 293       platform_window_->ReleaseCapture();
 294       break;
 295     default:
 296       break;
 297   }
 298
 299 #if defined(USE_X11)
 300   // We want to emulate the WM_CHAR generation behaviour of Windows.
 301   //
 302   // On Linux, we've previously inserted characters by having
 303   // InputMethodAuraLinux take all key down events and send a character event
 304   // to the TextInputClient. This causes a mismatch in code that has to be
 305   // shared between Windows and Linux, including blink code. Now that we're
 306   // trying to have one way of doing things, we need to standardize on and
 307   // emulate Windows character events.
 308   //
 309   // This is equivalent to what we're doing in the current Linux port, but
 310   // done once instead of done multiple times in different places.
 311   if (event->type() == ui::ET_KEY_PRESSED) {
 312     ui::KeyEvent* key_press_event = static_cast<ui::KeyEvent*>(event);
 313     ui::KeyEvent char_event(key_press_event->GetCharacter(),
 314                             key_press_event->key_code(),
 315                             key_press_event->flags());
 316
 317     DCHECK_EQ(key_press_event->GetCharacter(), char_event.GetCharacter());
 318     DCHECK_EQ(key_press_event->key_code(), char_event.key_code());
 319     DCHECK_EQ(key_press_event->flags(), char_event.flags());
 320
 321     char_event.SetExtendedKeyEventData(
 322         make_scoped_ptr(new mojo::MojoExtendedKeyEventData(
 323             key_press_event->GetLocatedWindowsKeyboardCode(),
 324             key_press_event->GetText(),
 325             key_press_event->GetUnmodifiedText())));
 326     char_event.set_platform_keycode(key_press_event->platform_keycode());
 327
 328     delegate_->OnEvent(mojo::Event::From(char_event));
 329   }
 330 #endif
 331 }
 332
 333 void DefaultDisplayManager::OnCloseRequest() {
 334   platform_window_->Close();
 335 }
 336
 337 void DefaultDisplayManager::OnClosed() {
 338   delegate_->OnDisplayClosed();
 339 }
 340
 341 void DefaultDisplayManager::OnWindowStateChanged(
 342     ui::PlatformWindowState new_state) {
 343 }
 344
 345 void DefaultDisplayManager::OnLostCapture() {
 346 }
 347
 348 void DefaultDisplayManager::OnAcceleratedWidgetAvailable(
 349     gfx::AcceleratedWidget widget,
 350     float device_pixel_ratio) {
 351   if (widget != gfx::kNullAcceleratedWidget) {
 352     top_level_display_client_.reset(new surfaces::TopLevelDisplayClient(
 353         widget, gpu_state_, surfaces_state_));
 354   }
 355   UpdateMetrics(metrics_.size_in_pixels.To<gfx::Size>(), device_pixel_ratio);
 356 }
 357
 358 void DefaultDisplayManager::OnActivationChanged(bool active) {
 359 }
 360
 361 }  // namespace view_manager