ash/display/mirror_window_controller.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 "ash/display/mirror_window_controller.h"
   6
   7 #if defined(USE_X11)
   8 #include <X11/Xlib.h>
   9 #include <X11/extensions/XInput2.h>
  10
  11 // Xlib.h defines RootWindow.
  12 #undef RootWindow
  13 #endif
  14
  15 #include "ash/display/cursor_window_controller.h"
  16 #include "ash/display/display_controller.h"
  17 #include "ash/display/display_info.h"
  18 #include "ash/display/display_manager.h"
  19 #include "ash/display/root_window_transformers.h"
  20 #include "ash/host/ash_window_tree_host.h"
  21 #include "ash/host/ash_window_tree_host_init_params.h"
  22 #include "ash/host/root_window_transformer.h"
  23 #include "ash/root_window_settings.h"
  24 #include "ash/shell.h"
  25 #include "base/strings/stringprintf.h"
  26 #include "ui/aura/client/capture_client.h"
  27 #include "ui/aura/env.h"
  28 #include "ui/aura/window_delegate.h"
  29 #include "ui/aura/window_event_dispatcher.h"
  30 #include "ui/aura/window_tree_host.h"
  31 #include "ui/base/layout.h"
  32 #include "ui/compositor/reflector.h"
  33 #include "ui/gfx/canvas.h"
  34 #include "ui/gfx/native_widget_types.h"
  35
  36 #if defined(USE_X11)
  37 #include "ui/gfx/x/x11_types.h"
  38 #endif
  39
  40 namespace ash {
  41 namespace {
  42
  43 #if defined(USE_X11)
  44 // Mirror window shouldn't handle input events.
  45 void DisableInput(XID window) {
  46   long event_mask = ExposureMask | VisibilityChangeMask |
  47       StructureNotifyMask | PropertyChangeMask;
  48   XSelectInput(gfx::GetXDisplay(), window, event_mask);
  49   unsigned char mask[XIMaskLen(XI_LASTEVENT)] = {0};
  50   XIEventMask evmask;
  51   evmask.deviceid = XIAllDevices;
  52   evmask.mask_len = sizeof(mask);
  53   evmask.mask = mask;
  54   XISelectEvents(gfx::GetXDisplay(), window, &evmask, 1);
  55 }
  56 #endif
  57
  58 class NoneCaptureClient : public aura::client::CaptureClient {
  59  public:
  60   NoneCaptureClient() {}
  61   ~NoneCaptureClient() override {}
  62
  63  private:
  64   // Does a capture on the |window|.
  65   void SetCapture(aura::Window* window) override {}
  66
  67   // Releases a capture from the |window|.
  68   void ReleaseCapture(aura::Window* window) override {}
  69
  70   // Returns the current capture window.
  71   aura::Window* GetCaptureWindow() override { return NULL; }
  72   aura::Window* GetGlobalCaptureWindow() override { return NULL; }
  73
  74   DISALLOW_COPY_AND_ASSIGN(NoneCaptureClient);
  75 };
  76
  77 }  // namespace
  78
  79 MirrorWindowController::MirrorWindowController() {}
  80
  81 MirrorWindowController::~MirrorWindowController() {
  82   // Make sure the root window gets deleted before cursor_window_delegate.
  83   Close();
  84 }
  85
  86 void MirrorWindowController::UpdateWindow(const DisplayInfo& display_info) {
  87   static int mirror_host_count = 0;
  88   if (!ash_host_.get()) {
  89     AshWindowTreeHostInitParams init_params;
  90     init_params.initial_bounds = display_info.bounds_in_native();
  91     ash_host_.reset(AshWindowTreeHost::Create(init_params));
  92     aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
  93     host->window()->SetName(
  94         base::StringPrintf("MirrorRootWindow-%d", mirror_host_count++));
  95     host->compositor()->SetBackgroundColor(SK_ColorBLACK);
  96     // No need to remove the observer because the DisplayController outlives the
  97     // host.
  98     host->AddObserver(Shell::GetInstance()->display_controller());
  99     host->AddObserver(this);
 100     // TODO(oshima): TouchHUD is using idkey.
 101     InitRootWindowSettings(host->window())->display_id = display_info.id();
 102     host->InitHost();
 103 #if defined(USE_X11)
 104     DisableInput(host->GetAcceleratedWidget());
 105 #endif
 106
 107     aura::client::SetCaptureClient(host->window(), new NoneCaptureClient());
 108     host->Show();
 109
 110     // TODO(oshima): Start mirroring.
 111     aura::Window* mirror_window = new aura::Window(NULL);
 112     mirror_window->Init(aura::WINDOW_LAYER_SOLID_COLOR);
 113     host->window()->AddChild(mirror_window);
 114     mirror_window->SetBounds(host->window()->bounds());
 115     mirror_window->Show();
 116     reflector_ = aura::Env::GetInstance()->context_factory()->CreateReflector(
 117         Shell::GetPrimaryRootWindow()->GetHost()->compositor(),
 118         mirror_window->layer());
 119   } else {
 120     aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
 121     GetRootWindowSettings(host->window())->display_id = display_info.id();
 122     host->SetBounds(display_info.bounds_in_native());
 123   }
 124
 125   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 126   const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
 127       Shell::GetScreen()->GetPrimaryDisplay().id());
 128   DCHECK(display_manager->IsMirrored());
 129   scoped_ptr<RootWindowTransformer> transformer(
 130       CreateRootWindowTransformerForMirroredDisplay(source_display_info,
 131                                                     display_info));
 132   ash_host_->SetRootWindowTransformer(transformer.Pass());
 133 }
 134
 135 void MirrorWindowController::UpdateWindow() {
 136   if (ash_host_.get()) {
 137     DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 138     const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
 139         display_manager->mirrored_display_id());
 140     UpdateWindow(mirror_display_info);
 141   }
 142 }
 143
 144 void MirrorWindowController::Close() {
 145   if (ash_host_.get()) {
 146     aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
 147     aura::Env::GetInstance()->context_factory()->RemoveReflector(
 148         reflector_.get());
 149     reflector_ = nullptr;
 150     NoneCaptureClient* capture_client = static_cast<NoneCaptureClient*>(
 151         aura::client::GetCaptureClient(host->window()));
 152     aura::client::SetCaptureClient(host->window(), NULL);
 153     delete capture_client;
 154
 155     host->RemoveObserver(Shell::GetInstance()->display_controller());
 156     host->RemoveObserver(this);
 157     ash_host_.reset();
 158   }
 159 }
 160
 161 void MirrorWindowController::OnHostResized(const aura::WindowTreeHost* host) {
 162   if (mirror_window_host_size_ == host->GetBounds().size())
 163     return;
 164   mirror_window_host_size_ = host->GetBounds().size();
 165   reflector_->OnMirroringCompositorResized();
 166   ash_host_->SetRootWindowTransformer(CreateRootWindowTransformer().Pass());
 167   Shell::GetInstance()->display_controller()->cursor_window_controller()->
 168       UpdateLocation();
 169 }
 170
 171 aura::Window* MirrorWindowController::GetWindow() {
 172   return ash_host_.get() ? ash_host_->AsWindowTreeHost()->window() : NULL;
 173 }
 174
 175 scoped_ptr<RootWindowTransformer>
 176 MirrorWindowController::CreateRootWindowTransformer() const {
 177   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 178   const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
 179       display_manager->mirrored_display_id());
 180   const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
 181       Shell::GetScreen()->GetPrimaryDisplay().id());
 182   DCHECK(display_manager->IsMirrored());
 183   return scoped_ptr<RootWindowTransformer>(
 184       CreateRootWindowTransformerForMirroredDisplay(source_display_info,
 185                                                     mirror_display_info));
 186 }
 187
 188 }  // namespace ash