mus: move View Manager to components/mus/vm

components/mus/display_manager.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "components/mus/display_manager.h"
-
-#include "base/numerics/safe_conversions.h"
-#include "cc/output/compositor_frame.h"
-#include "cc/output/delegated_frame_data.h"
-#include "cc/quads/render_pass.h"
-#include "cc/quads/shared_quad_state.h"
-#include "cc/quads/surface_draw_quad.h"
-#include "components/mus/display_manager_factory.h"
-#include "components/mus/gles2/gpu_state.h"
-#include "components/mus/public/interfaces/gpu.mojom.h"
-#include "components/mus/public/interfaces/quads.mojom.h"
-#include "components/mus/server_view.h"
-#include "components/mus/surfaces/surfaces_state.h"
-#include "components/mus/view_coordinate_conversions.h"
-#include "mojo/application/public/cpp/application_connection.h"
-#include "mojo/application/public/cpp/application_impl.h"
-#include "mojo/converters/geometry/geometry_type_converters.h"
-#include "mojo/converters/input_events/input_events_type_converters.h"
-#include "mojo/converters/input_events/mojo_extended_key_event_data.h"
-#include "mojo/converters/surfaces/surfaces_type_converters.h"
-#include "mojo/converters/surfaces/surfaces_utils.h"
-#include "mojo/converters/transform/transform_type_converters.h"
-#include "third_party/skia/include/core/SkXfermode.h"
-#include "ui/events/event.h"
-#include "ui/events/event_utils.h"
-#include "ui/gfx/display.h"
-#include "ui/platform_window/platform_ime_controller.h"
-#include "ui/platform_window/platform_window.h"
-
-#if defined(OS_WIN)
-#include "ui/platform_window/win/win_window.h"
-#elif defined(USE_X11)
-#include "ui/platform_window/x11/x11_window.h"
-#elif defined(OS_ANDROID)
-#include "ui/platform_window/android/platform_window_android.h"
-#endif
-
-using mojo::Rect;
-using mojo::Size;
-
-namespace mus {
-namespace {
-
-// DrawViewTree recursively visits ServerViews, creating a SurfaceDrawQuad for
-// each that lacks one. For Views that already have CompositorFrames, we can
-// skip this step and let cc::SurfaceAggregator do the heavy lifting.
-// |skip_view| indicates whether or not we should generate a SurfaceDrawQuad
-// for the provided |view|.
-void DrawViewTree(cc::RenderPass* pass,
-                  const ServerView* view,
-                  const gfx::Vector2d& parent_to_root_origin_offset,
-                  float opacity,
-                  bool skip_view) {
-  if (!view->visible())
-    return;
-
-  const gfx::Rect absolute_bounds =
-      view->bounds() + parent_to_root_origin_offset;
-
-  std::vector<const ServerView*> children(view->GetChildren());
-  // TODO(rjkroege, fsamuel): Make sure we're handling alpha correctly.
-  const float combined_opacity = opacity * view->opacity();
-  for (auto it = children.rbegin(); it != children.rend(); ++it) {
-    DrawViewTree(pass, *it, absolute_bounds.OffsetFromOrigin(),
-                combined_opacity,
-                view->parent() &&
-                    !view->surface_id().is_null() /* skip_view */);
-  }
-
-  if (skip_view || view->surface_id().is_null())
-    return;
-
-  gfx::Transform quad_to_target_transform;
-  quad_to_target_transform.Translate(absolute_bounds.x(), absolute_bounds.y());
-  gfx::Rect bounds_at_origin(view->bounds().size());
-
-  cc::SharedQuadState* sqs = pass->CreateAndAppendSharedQuadState();
-  // TODO(fsamuel): These clipping and visible rects are incorrect. They need
-  // to be populated from CompositorFrame structs.
-  sqs->SetAll(
-      quad_to_target_transform, bounds_at_origin.size() /* layer_bounds */,
-      bounds_at_origin /* visible_layer_bounds */,
-      bounds_at_origin /* clip_rect */, false /* is_clipped */, view->opacity(),
-      SkXfermode::kSrc_Mode, 0 /* sorting-context_id */);
-
-  auto surface_quad = pass->CreateAndAppendDrawQuad<cc::SurfaceDrawQuad>();
-  surface_quad->SetNew(sqs, bounds_at_origin /* rect */,
-                       bounds_at_origin /* visible_rect */, view->surface_id());
-}
-
-}  // namespace
-
-// static
-DisplayManagerFactory* DisplayManager::factory_ = nullptr;
-
-// static
-DisplayManager* DisplayManager::Create(
-    mojo::ApplicationImpl* app_impl,
-    const scoped_refptr<GpuState>& gpu_state,
-    const scoped_refptr<SurfacesState>& surfaces_state) {
-  if (factory_) {
-    return factory_->CreateDisplayManager(app_impl, gpu_state,
-                                          surfaces_state);
-  }
-  return new DefaultDisplayManager(app_impl, gpu_state,
-                                   surfaces_state);
-}
-
-DefaultDisplayManager::DefaultDisplayManager(
-    mojo::ApplicationImpl* app_impl,
-    const scoped_refptr<GpuState>& gpu_state,
-    const scoped_refptr<SurfacesState>& surfaces_state)
-    : app_impl_(app_impl),
-      gpu_state_(gpu_state),
-      surfaces_state_(surfaces_state),
-      delegate_(nullptr),
-      draw_timer_(false, false),
-      frame_pending_(false),
-      weak_factory_(this) {
-  metrics_.size_in_pixels = mojo::Size::New();
-  metrics_.size_in_pixels->width = 800;
-  metrics_.size_in_pixels->height = 600;
-}
-
-void DefaultDisplayManager::Init(DisplayManagerDelegate* delegate) {
-  delegate_ = delegate;
-
-  gfx::Rect bounds(metrics_.size_in_pixels.To<gfx::Size>());
-#if defined(OS_WIN)
-  platform_window_.reset(new ui::WinWindow(this, bounds));
-#elif defined(USE_X11)
-  platform_window_.reset(new ui::X11Window(this));
-#elif defined(OS_ANDROID)
-  platform_window_.reset(new ui::PlatformWindowAndroid(this));
-#else
-  NOTREACHED() << "Unsupported platform";
-#endif
-  platform_window_->SetBounds(bounds);
-  platform_window_->Show();
-}
-
-DefaultDisplayManager::~DefaultDisplayManager() {
-  delegate_->OnTopLevelSurfaceChanged(cc::SurfaceId());
-  // Invalidate WeakPtrs now to avoid callbacks back into the
-  // DefaultDisplayManager during destruction of |top_level_display_client_|.
-  weak_factory_.InvalidateWeakPtrs();
-  top_level_display_client_.reset();
-  // Destroy the PlatformWindow early on as it may call us back during
-  // destruction and we want to be in a known state. But destroy the surface
-  // first because it can still be using the platform window.
-  platform_window_.reset();
-}
-
-void DefaultDisplayManager::SchedulePaint(const ServerView* view,
-                                          const gfx::Rect& bounds) {
-  DCHECK(view);
-  if (!view->IsDrawn())
-    return;
-  const gfx::Rect root_relative_rect =
-      ConvertRectBetweenViews(view, delegate_->GetRootView(), bounds);
-  if (root_relative_rect.IsEmpty())
-    return;
-  dirty_rect_.Union(root_relative_rect);
-  WantToDraw();
-}
-
-void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
-  platform_window_->SetBounds(gfx::Rect(size));
-}
-
-void DefaultDisplayManager::SetTitle(const base::string16& title) {
-  platform_window_->SetTitle(title);
-}
-
-const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
-  return metrics_;
-}
-
-void DefaultDisplayManager::UpdateTextInputState(
-    const ui::TextInputState& state) {
-  ui::PlatformImeController* ime = platform_window_->GetPlatformImeController();
-  if (ime)
-    ime->UpdateTextInputState(state);
-}
-
-void DefaultDisplayManager::SetImeVisibility(bool visible) {
-  ui::PlatformImeController* ime = platform_window_->GetPlatformImeController();
-  if (ime)
-    ime->SetImeVisibility(visible);
-}
-
-void DefaultDisplayManager::Draw() {
-  if (!delegate_->GetRootView()->visible())
-    return;
-
-  // TODO(fsamuel): We should add a trace for generating a top level frame.
-  scoped_ptr<cc::CompositorFrame> frame(GenerateCompositorFrame());
-  frame_pending_ = true;
-  if (top_level_display_client_) {
-    top_level_display_client_->SubmitCompositorFrame(
-        frame.Pass(), base::Bind(&DefaultDisplayManager::DidDraw,
-                                 weak_factory_.GetWeakPtr()));
-  }
-  dirty_rect_ = gfx::Rect();
-}
-
-void DefaultDisplayManager::DidDraw() {
-  frame_pending_ = false;
-  if (!dirty_rect_.IsEmpty())
-    WantToDraw();
-}
-
-void DefaultDisplayManager::WantToDraw() {
-  if (draw_timer_.IsRunning() || frame_pending_)
-    return;
-
-  draw_timer_.Start(
-      FROM_HERE, base::TimeDelta(),
-      base::Bind(&DefaultDisplayManager::Draw, weak_factory_.GetWeakPtr()));
-}
-
-void DefaultDisplayManager::UpdateMetrics(const gfx::Size& size,
-                                          float device_pixel_ratio) {
-  if (gfx::Display::HasForceDeviceScaleFactor())
-    device_pixel_ratio = gfx::Display::GetForcedDeviceScaleFactor();
-  if (metrics_.size_in_pixels.To<gfx::Size>() == size &&
-      metrics_.device_pixel_ratio == device_pixel_ratio)
-    return;
-  mojo::ViewportMetrics old_metrics;
-  old_metrics.size_in_pixels = metrics_.size_in_pixels.Clone();
-  old_metrics.device_pixel_ratio = metrics_.device_pixel_ratio;
-
-  metrics_.size_in_pixels = mojo::Size::From(size);
-  metrics_.device_pixel_ratio = device_pixel_ratio;
-
-  delegate_->OnViewportMetricsChanged(old_metrics, metrics_);
-}
-
-scoped_ptr<cc::CompositorFrame>
-DefaultDisplayManager::GenerateCompositorFrame() {
-  scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
-  render_pass->damage_rect = dirty_rect_;
-  render_pass->output_rect = gfx::Rect(metrics_.size_in_pixels.To<gfx::Size>());
-
-  DrawViewTree(render_pass.get(),
-               delegate_->GetRootView(),
-               gfx::Vector2d(), 1.0f,
-               false /* skip_view */);
-
-  scoped_ptr<cc::DelegatedFrameData> frame_data(new cc::DelegatedFrameData);
-  frame_data->device_scale_factor = metrics_.device_pixel_ratio;
-  frame_data->render_pass_list.push_back(render_pass.Pass());
-
-  scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
-  frame->delegated_frame_data = frame_data.Pass();
-  return frame.Pass();
-}
-
-void DefaultDisplayManager::OnBoundsChanged(const gfx::Rect& new_bounds) {
-  UpdateMetrics(new_bounds.size(), metrics_.device_pixel_ratio);
-}
-
-void DefaultDisplayManager::OnDamageRect(const gfx::Rect& damaged_region) {
-  dirty_rect_.Union(damaged_region);
-  WantToDraw();
-}
-
-void DefaultDisplayManager::DispatchEvent(ui::Event* event) {
-  mojo::EventPtr mojo_event(mojo::Event::From(*event));
-  delegate_->OnEvent(mojo_event.Pass());
-
-  switch (event->type()) {
-    case ui::ET_MOUSE_PRESSED:
-    case ui::ET_TOUCH_PRESSED:
-      platform_window_->SetCapture();
-      break;
-    case ui::ET_MOUSE_RELEASED:
-    case ui::ET_TOUCH_RELEASED:
-      platform_window_->ReleaseCapture();
-      break;
-    default:
-      break;
-  }
-
-#if defined(USE_X11)
-  // We want to emulate the WM_CHAR generation behaviour of Windows.
-  //
-  // On Linux, we've previously inserted characters by having
-  // InputMethodAuraLinux take all key down events and send a character event
-  // to the TextInputClient. This causes a mismatch in code that has to be
-  // shared between Windows and Linux, including blink code. Now that we're
-  // trying to have one way of doing things, we need to standardize on and
-  // emulate Windows character events.
-  //
-  // This is equivalent to what we're doing in the current Linux port, but
-  // done once instead of done multiple times in different places.
-  if (event->type() == ui::ET_KEY_PRESSED) {
-    ui::KeyEvent* key_press_event = static_cast<ui::KeyEvent*>(event);
-    ui::KeyEvent char_event(key_press_event->GetCharacter(),
-                            key_press_event->key_code(),
-                            key_press_event->flags());
-
-    DCHECK_EQ(key_press_event->GetCharacter(), char_event.GetCharacter());
-    DCHECK_EQ(key_press_event->key_code(), char_event.key_code());
-    DCHECK_EQ(key_press_event->flags(), char_event.flags());
-
-    char_event.SetExtendedKeyEventData(
-        make_scoped_ptr(new mojo::MojoExtendedKeyEventData(
-            key_press_event->GetLocatedWindowsKeyboardCode(),
-            key_press_event->GetText(), key_press_event->GetUnmodifiedText())));
-
-    delegate_->OnEvent(mojo::Event::From(char_event));
-  }
-#endif
-}
-
-void DefaultDisplayManager::OnCloseRequest() {
-  platform_window_->Close();
-}
-
-void DefaultDisplayManager::OnClosed() {
-  delegate_->OnDisplayClosed();
-}
-
-void DefaultDisplayManager::OnWindowStateChanged(
-    ui::PlatformWindowState new_state) {}
-
-void DefaultDisplayManager::OnLostCapture() {}
-
-void DefaultDisplayManager::OnAcceleratedWidgetAvailable(
-    gfx::AcceleratedWidget widget,
-    float device_pixel_ratio) {
-  if (widget != gfx::kNullAcceleratedWidget) {
-    top_level_display_client_.reset(
-        new TopLevelDisplayClient(widget, gpu_state_, surfaces_state_));
-    delegate_->OnTopLevelSurfaceChanged(
-        top_level_display_client_->surface_id());
-  }
-  UpdateMetrics(metrics_.size_in_pixels.To<gfx::Size>(), device_pixel_ratio);
-}
-
-void DefaultDisplayManager::OnActivationChanged(bool active) {}
-
-}  // namespace mus