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arc_custom_tab.cc
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arc_custom_tab.cc
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// Copyright 2019 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 "ash/public/cpp/arc_custom_tab.h"
#include <memory>
#include <string>
#include <utility>
#include "base/threading/sequenced_task_runner_handle.h"
#include "components/exo/surface.h"
#include "ui/aura/window.h"
#include "ui/aura/window_targeter.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_delegate.h"
namespace ash {
namespace {
// Enumerates surfaces under the window.
void EnumerateSurfaces(aura::Window* window, std::vector<exo::Surface*>* out) {
auto* surface = exo::Surface::AsSurface(window);
if (surface)
out->push_back(surface);
for (aura::Window* child : window->children())
EnumerateSurfaces(child, out);
}
} // namespace
ArcCustomTab::ArcCustomTab(aura::Window* arc_app_window,
int32_t surface_id,
int32_t top_margin)
: arc_app_window_(arc_app_window),
surface_id_(surface_id),
top_margin_(top_margin) {
other_windows_observer_.Add(arc_app_window_);
host_->set_owned_by_client();
auto* const widget = views::Widget::GetWidgetForNativeWindow(arc_app_window_);
DCHECK(widget);
widget->GetContentsView()->AddChildView(host_.get());
}
ArcCustomTab::~ArcCustomTab() = default;
void ArcCustomTab::Attach(gfx::NativeView view) {
DCHECK(view);
DCHECK(!GetHostView());
host_->Attach(view);
aura::Window* const container = host_->GetNativeViewContainer();
container->SetEventTargeter(std::make_unique<aura::WindowTargeter>());
other_windows_observer_.Add(container);
EnsureWindowOrders();
UpdateSurfaceIfNecessary();
}
gfx::NativeView ArcCustomTab::GetHostView() {
return host_->native_view();
}
void ArcCustomTab::OnWindowHierarchyChanged(
const HierarchyChangeParams& params) {
if ((params.receiver == arc_app_window_) &&
exo::Surface::AsSurface(params.target) && params.new_parent)
UpdateSurfaceIfNecessary();
}
void ArcCustomTab::OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds,
ui::PropertyChangeReason reason) {
if (surface_window_observer_.IsObserving(window) &&
old_bounds.size() != new_bounds.size())
OnSurfaceBoundsMaybeChanged(window);
}
void ArcCustomTab::OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) {
if (surfaces_observer_.IsObserving(window) && key == exo::kClientSurfaceIdKey)
UpdateSurfaceIfNecessary();
}
void ArcCustomTab::OnWindowStackingChanged(aura::Window* window) {
if (window == host_->GetNativeViewContainer() &&
!weak_ptr_factory_.HasWeakPtrs()) {
// Reordering should happen asynchronously -- some entity (like
// views::WindowReorderer) changes the window orders, and then ensures layer
// orders later. Changing order here synchronously leads to inconsistent
// window/layer ordering and causes weird graphical effects.
// TODO(hashimoto): fix the views ordering and remove this handling.
base::SequencedTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(&ArcCustomTab::EnsureWindowOrders,
weak_ptr_factory_.GetWeakPtr()));
}
}
void ArcCustomTab::OnWindowDestroying(aura::Window* window) {
if (surfaces_observer_.IsObserving(window))
surfaces_observer_.Remove(window);
if (surface_window_observer_.IsObserving(window))
surface_window_observer_.Remove(window);
if (other_windows_observer_.IsObserving(window))
other_windows_observer_.Remove(window);
}
void ArcCustomTab::OnSurfaceBoundsMaybeChanged(aura::Window* surface_window) {
DCHECK(surface_window);
gfx::Point origin(0, top_margin_);
gfx::Point bottom_right(surface_window->bounds().width(),
surface_window->bounds().height());
ConvertPointFromWindow(surface_window, &origin);
ConvertPointFromWindow(surface_window, &bottom_right);
host_->SetBounds(origin.x(), origin.y(), bottom_right.x() - origin.x(),
bottom_right.y() - origin.y());
}
void ArcCustomTab::EnsureWindowOrders() {
aura::Window* const container = host_->GetNativeViewContainer();
if (container)
container->parent()->StackChildAtTop(container);
}
void ArcCustomTab::ConvertPointFromWindow(aura::Window* window,
gfx::Point* point) {
views::Widget* const widget = host_->GetWidget();
aura::Window::ConvertPointToTarget(window, widget->GetNativeWindow(), point);
views::View::ConvertPointFromWidget(widget->GetContentsView(), point);
}
void ArcCustomTab::UpdateSurfaceIfNecessary() {
std::vector<exo::Surface*> surfaces;
EnumerateSurfaces(arc_app_window_, &surfaces);
// Try to find the surface.
const auto it = std::find_if(surfaces.cbegin(), surfaces.cend(),
[id = surface_id_](const auto* surface) {
return surface->GetClientSurfaceId() == id;
});
if (it == surfaces.cend()) {
for (auto* surface : surfaces) {
if (!surface->GetClientSurfaceId() &&
!surfaces_observer_.IsObserving(surface->window()))
surfaces_observer_.Add(surface->window());
}
} else {
surfaces_observer_.RemoveAll();
auto* const window = (*it)->window();
if (!surface_window_observer_.IsObserving(window)) {
surface_window_observer_.RemoveAll();
surface_window_observer_.Add(window);
OnSurfaceBoundsMaybeChanged(window);
}
}
}
} // namespace ash