headless: Initial headless embedder API implementation

headless/lib/browser/headless_screen.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2016 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 "ui/aura/test/test_screen.h"
+#include "headless/lib/browser/headless_screen.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/screen.h"
 
-namespace aura {
+namespace headless {
 
 namespace {
 
 bool IsRotationPortrait(gfx::Display::Rotation rotation) {
   return rotation == gfx::Display::ROTATE_90 ||
          rotation == gfx::Display::ROTATE_270;
 }
 
 }  // namespace
 
 // static
-TestScreen* TestScreen::Create(const gfx::Size& size) {
+HeadlessScreen* HeadlessScreen::Create(const gfx::Size& size) {
   const gfx::Size kDefaultSize(800, 600);
-  // Use (0,0) because the desktop aura tests are executed in
-  // native environment where the display's origin is (0,0).
-  return new TestScreen(gfx::Rect(size.IsEmpty() ? kDefaultSize : size));
+  return new HeadlessScreen(gfx::Rect(size.IsEmpty() ? kDefaultSize : size));
 }
 
-TestScreen::~TestScreen() {
-}
+HeadlessScreen::~HeadlessScreen() {}
 
-WindowTreeHost* TestScreen::CreateHostForPrimaryDisplay() {
+aura::WindowTreeHost* HeadlessScreen::CreateHostForPrimaryDisplay() {
   DCHECK(!host_);
-  host_ = WindowTreeHost::Create(gfx::Rect(display_.GetSizeInPixel()));
+  host_ = aura::WindowTreeHost::Create(gfx::Rect(display_.GetSizeInPixel()));
   // Some tests don't correctly manage window focus/activation states.
   // Makes sure InputMethod is default focused so that IME basics can work.
   host_->GetInputMethod()->OnFocus();
   host_->window()->AddObserver(this);
   host_->InitHost();
   return host_;
 }
 
-void TestScreen::SetDeviceScaleFactor(float device_scale_factor) {
+void HeadlessScreen::SetDeviceScaleFactor(float device_scale_factor) {
   gfx::Rect bounds_in_pixel(display_.GetSizeInPixel());
   display_.SetScaleAndBounds(device_scale_factor, bounds_in_pixel);
-  host_->OnHostResized(bounds_in_pixel.size());
 }
 
-void TestScreen::SetDisplayRotation(gfx::Display::Rotation rotation) {
+void HeadlessScreen::SetDisplayRotation(gfx::Display::Rotation rotation) {
   gfx::Rect bounds_in_pixel(display_.GetSizeInPixel());
   gfx::Rect new_bounds(bounds_in_pixel);
   if (IsRotationPortrait(rotation) != IsRotationPortrait(display_.rotation())) {
     new_bounds.set_width(bounds_in_pixel.height());
     new_bounds.set_height(bounds_in_pixel.width());
   }
   display_.set_rotation(rotation);
   display_.SetScaleAndBounds(display_.device_scale_factor(), new_bounds);
   host_->SetRootTransform(GetRotationTransform() * GetUIScaleTransform());
 }
 
-void TestScreen::SetUIScale(float ui_scale) {
+void HeadlessScreen::SetUIScale(float ui_scale) {
   ui_scale_ = ui_scale;
   gfx::Rect bounds_in_pixel(display_.GetSizeInPixel());
   gfx::Rect new_bounds = gfx::ToNearestRect(
       gfx::ScaleRect(gfx::RectF(bounds_in_pixel), 1.0f / ui_scale));
   display_.SetScaleAndBounds(display_.device_scale_factor(), new_bounds);
   host_->SetRootTransform(GetRotationTransform() * GetUIScaleTransform());
 }
 
-void TestScreen::SetWorkAreaInsets(const gfx::Insets& insets) {
+void HeadlessScreen::SetWorkAreaInsets(const gfx::Insets& insets) {
   display_.UpdateWorkAreaFromInsets(insets);
 }
 
-gfx::Transform TestScreen::GetRotationTransform() const {
+gfx::Transform HeadlessScreen::GetRotationTransform() const {
   gfx::Transform rotate;
   switch (display_.rotation()) {
     case gfx::Display::ROTATE_0:
       break;
     case gfx::Display::ROTATE_90:
       rotate.Translate(display_.bounds().height(), 0);
       rotate.Rotate(90);
       break;
     case gfx::Display::ROTATE_270:
       rotate.Translate(0, display_.bounds().width());
       rotate.Rotate(270);
       break;
     case gfx::Display::ROTATE_180:
-      rotate.Translate(display_.bounds().width(),
-                       display_.bounds().height());
+      rotate.Translate(display_.bounds().width(), display_.bounds().height());
       rotate.Rotate(180);
       break;
   }
 
   return rotate;
 }
 
-gfx::Transform TestScreen::GetUIScaleTransform() const {
+gfx::Transform HeadlessScreen::GetUIScaleTransform() const {
   gfx::Transform ui_scale;
   ui_scale.Scale(1.0f / ui_scale_, 1.0f / ui_scale_);
   return ui_scale;
 }
 
-void TestScreen::OnWindowBoundsChanged(
-    Window* window, const gfx::Rect& old_bounds, const gfx::Rect& new_bounds) {
+void HeadlessScreen::OnWindowBoundsChanged(aura::Window* window,
+                                           const gfx::Rect& old_bounds,
+                                           const gfx::Rect& new_bounds) {
   DCHECK_EQ(host_->window(), window);
   display_.SetSize(gfx::ScaleToFlooredSize(new_bounds.size(),
                                            display_.device_scale_factor()));
 }
 
-void TestScreen::OnWindowDestroying(Window* window) {
+void HeadlessScreen::OnWindowDestroying(aura::Window* window) {
   if (host_->window() == window)
     host_ = NULL;
 }
 
-gfx::Point TestScreen::GetCursorScreenPoint() {
-  return Env::GetInstance()->last_mouse_location();
+gfx::Point HeadlessScreen::GetCursorScreenPoint() {
+  return aura::Env::GetInstance()->last_mouse_location();
 }
 
-gfx::NativeWindow TestScreen::GetWindowUnderCursor() {
+gfx::NativeWindow HeadlessScreen::GetWindowUnderCursor() {
   return GetWindowAtScreenPoint(GetCursorScreenPoint());
 }
 
-gfx::NativeWindow TestScreen::GetWindowAtScreenPoint(const gfx::Point& point) {
+gfx::NativeWindow HeadlessScreen::GetWindowAtScreenPoint(
+    const gfx::Point& point) {
   if (!host_ || !host_->window())
     return nullptr;
   return host_->window()->GetTopWindowContainingPoint(point);
 }
 
-int TestScreen::GetNumDisplays() const {
+int HeadlessScreen::GetNumDisplays() const {
   return 1;
 }
 
-std::vector<gfx::Display> TestScreen::GetAllDisplays() const {
+std::vector<gfx::Display> HeadlessScreen::GetAllDisplays() const {
   return std::vector<gfx::Display>(1, display_);
 }
 
-gfx::Display TestScreen::GetDisplayNearestWindow(
+gfx::Display HeadlessScreen::GetDisplayNearestWindow(
     gfx::NativeWindow window) const {
   return display_;
 }
 
-gfx::Display TestScreen::GetDisplayNearestPoint(const gfx::Point& point) const {
+gfx::Display HeadlessScreen::GetDisplayNearestPoint(
+    const gfx::Point& point) const {
   return display_;
 }
 
-gfx::Display TestScreen::GetDisplayMatching(const gfx::Rect& match_rect) const {
+gfx::Display HeadlessScreen::GetDisplayMatching(
+    const gfx::Rect& match_rect) const {
   return display_;
 }
 
-gfx::Display TestScreen::GetPrimaryDisplay() const {
+gfx::Display HeadlessScreen::GetPrimaryDisplay() const {
   return display_;
 }
 
-void TestScreen::AddObserver(gfx::DisplayObserver* observer) {
-}
+void HeadlessScreen::AddObserver(gfx::DisplayObserver* observer) {}
 
-void TestScreen::RemoveObserver(gfx::DisplayObserver* observer) {
-}
+void HeadlessScreen::RemoveObserver(gfx::DisplayObserver* observer) {}
 
-TestScreen::TestScreen(const gfx::Rect& screen_bounds)
-    : host_(NULL),
-      ui_scale_(1.0f) {
+HeadlessScreen::HeadlessScreen(const gfx::Rect& screen_bounds)
+    : host_(NULL), ui_scale_(1.0f) {
   static int64_t synthesized_display_id = 2000;
   display_.set_id(synthesized_display_id++);
   display_.SetScaleAndBounds(1.0f, screen_bounds);
 }
 
-}  // namespace aura
+}  // namespace headless