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// Copyright (c) 2013 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/window_tree_host.h"
#include "ui/aura/env.h"
#include "ui/aura/root_window.h"
#include "ui/aura/root_window_transformer.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host_delegate.h"
#include "ui/compositor/dip_util.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/display.h"
#include "ui/gfx/insets.h"
#include "ui/gfx/point.h"
#include "ui/gfx/point3_f.h"
#include "ui/gfx/point_conversions.h"
#include "ui/gfx/screen.h"
#include "ui/gfx/size_conversions.h"
namespace aura {
float GetDeviceScaleFactorFromDisplay(Window* window) {
gfx::Display display = gfx::Screen::GetScreenFor(window)->
GetDisplayNearestWindow(window);
DCHECK(display.is_valid());
return display.device_scale_factor();
}
class SimpleRootWindowTransformer : public RootWindowTransformer {
public:
SimpleRootWindowTransformer(const Window* root_window,
const gfx::Transform& transform)
: root_window_(root_window),
transform_(transform) {
}
// RootWindowTransformer overrides:
virtual gfx::Transform GetTransform() const OVERRIDE {
return transform_;
}
virtual gfx::Transform GetInverseTransform() const OVERRIDE {
gfx::Transform invert;
if (!transform_.GetInverse(&invert))
return transform_;
return invert;
}
virtual gfx::Rect GetRootWindowBounds(
const gfx::Size& host_size) const OVERRIDE {
gfx::Rect bounds(host_size);
gfx::RectF new_bounds(ui::ConvertRectToDIP(root_window_->layer(), bounds));
transform_.TransformRect(&new_bounds);
return gfx::Rect(gfx::ToFlooredSize(new_bounds.size()));
}
virtual gfx::Insets GetHostInsets() const OVERRIDE {
return gfx::Insets();
}
private:
virtual ~SimpleRootWindowTransformer() {}
const Window* root_window_;
const gfx::Transform transform_;
DISALLOW_COPY_AND_ASSIGN(SimpleRootWindowTransformer);
};
////////////////////////////////////////////////////////////////////////////////
// WindowTreeHost, public:
WindowTreeHost::~WindowTreeHost() {
DCHECK(!compositor_) << "compositor must be destroyed before root window";
}
void WindowTreeHost::InitHost() {
window()->Init(aura::WINDOW_LAYER_NOT_DRAWN);
InitCompositor();
UpdateRootWindowSize(GetBounds().size());
Env::GetInstance()->NotifyRootWindowInitialized(delegate_->AsRootWindow());
window()->Show();
}
void WindowTreeHost::InitCompositor() {
compositor_->SetScaleAndSize(GetDeviceScaleFactorFromDisplay(window()),
GetBounds().size());
compositor_->SetRootLayer(window()->layer());
transformer_.reset(
new SimpleRootWindowTransformer(window(), gfx::Transform()));
}
aura::Window* WindowTreeHost::window() {
return const_cast<Window*>(const_cast<const WindowTreeHost*>(this)->window());
}
const aura::Window* WindowTreeHost::window() const {
return delegate_->AsRootWindow()->window();
}
void WindowTreeHost::SetRootWindowTransformer(
scoped_ptr<RootWindowTransformer> transformer) {
transformer_ = transformer.Pass();
SetInsets(transformer_->GetHostInsets());
window()->SetTransform(transformer_->GetTransform());
// If the layer is not animating, then we need to update the root window
// size immediately.
if (!window()->layer()->GetAnimator()->is_animating())
UpdateRootWindowSize(GetBounds().size());
}
gfx::Transform WindowTreeHost::GetRootTransform() const {
float scale = ui::GetDeviceScaleFactor(window()->layer());
gfx::Transform transform;
transform.Scale(scale, scale);
transform *= transformer_->GetTransform();
return transform;
}
void WindowTreeHost::SetTransform(const gfx::Transform& transform) {
scoped_ptr<RootWindowTransformer> transformer(
new SimpleRootWindowTransformer(window(), transform));
SetRootWindowTransformer(transformer.Pass());
}
gfx::Transform WindowTreeHost::GetInverseRootTransform() const {
float scale = ui::GetDeviceScaleFactor(window()->layer());
gfx::Transform transform;
transform.Scale(1.0f / scale, 1.0f / scale);
return transformer_->GetInverseTransform() * transform;
}
void WindowTreeHost::UpdateRootWindowSize(const gfx::Size& host_size) {
window()->SetBounds(transformer_->GetRootWindowBounds(host_size));
}
void WindowTreeHost::ConvertPointToNativeScreen(gfx::Point* point) const {
ConvertPointToHost(point);
gfx::Point location = GetLocationOnNativeScreen();
point->Offset(location.x(), location.y());
}
void WindowTreeHost::ConvertPointFromNativeScreen(gfx::Point* point) const {
gfx::Point location = GetLocationOnNativeScreen();
point->Offset(-location.x(), -location.y());
ConvertPointFromHost(point);
}
void WindowTreeHost::ConvertPointToHost(gfx::Point* point) const {
gfx::Point3F point_3f(*point);
GetRootTransform().TransformPoint(&point_3f);
*point = gfx::ToFlooredPoint(point_3f.AsPointF());
}
void WindowTreeHost::ConvertPointFromHost(gfx::Point* point) const {
gfx::Point3F point_3f(*point);
GetInverseRootTransform().TransformPoint(&point_3f);
*point = gfx::ToFlooredPoint(point_3f.AsPointF());
}
////////////////////////////////////////////////////////////////////////////////
// WindowTreeHost, protected:
WindowTreeHost::WindowTreeHost()
: delegate_(NULL) {
}
void WindowTreeHost::DestroyCompositor() {
DCHECK(GetAcceleratedWidget());
compositor_.reset();
}
void WindowTreeHost::CreateCompositor(
gfx::AcceleratedWidget accelerated_widget) {
compositor_.reset(new ui::Compositor(GetAcceleratedWidget()));
DCHECK(compositor_.get());
}
void WindowTreeHost::NotifyHostResized(const gfx::Size& new_size) {
// The compositor should have the same size as the native root window host.
// Get the latest scale from display because it might have been changed.
compositor_->SetScaleAndSize(GetDeviceScaleFactorFromDisplay(window()),
new_size);
gfx::Size layer_size = GetBounds().size();
// The layer, and the observers should be notified of the
// transformed size of the root window.
UpdateRootWindowSize(layer_size);
delegate_->OnHostResized(layer_size);
}
#if defined(OS_ANDROID)
// static
WindowTreeHost* WindowTreeHost::Create(const gfx::Rect& bounds) {
// This is only hit for tests and ash, right now these aren't an issue so
// adding the CHECK.
// TODO(sky): decide if we want a factory.
CHECK(false);
return NULL;
}
#endif
} // namespace aura
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