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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/host/ash_window_tree_host_unified.h"
#include <algorithm>
#include <memory>
#include <tuple>
#include <utility>
#include "ash/host/ash_window_tree_host_delegate.h"
#include "ash/host/root_window_transformer.h"
#include "base/check.h"
#include "base/containers/contains.h"
#include "base/memory/raw_ptr.h"
#include "base/notreached.h"
#include "base/types/cxx23_to_underlying.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/aura/window_targeter.h"
#include "ui/compositor/compositor.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/platform_window/stub/stub_window.h"
namespace ash {
class UnifiedEventTargeter : public aura::WindowTargeter {
public:
UnifiedEventTargeter(aura::Window* src_root,
aura::Window* dst_root,
AshWindowTreeHostDelegate* delegate)
: src_root_(src_root), dst_root_(dst_root), delegate_(delegate) {
DCHECK(delegate);
}
UnifiedEventTargeter(const UnifiedEventTargeter&) = delete;
UnifiedEventTargeter& operator=(const UnifiedEventTargeter&) = delete;
~UnifiedEventTargeter() override { delegate_ = nullptr; }
// aura::WindowTargeter:
ui::EventTarget* FindTargetForEvent(ui::EventTarget* root,
ui::Event* event) override {
delegate_->SetCurrentEventTargeterSourceHost(nullptr);
if (root == src_root_ && !event->target()) {
return root;
} else {
NOTREACHED() << "event type:" << base::to_underlying(event->type());
}
}
ui::EventSink* GetNewEventSinkForEvent(const ui::EventTarget* current_root,
ui::EventTarget* target,
ui::Event* in_out_event) override {
if (current_root == src_root_ && !in_out_event->target()) {
delegate_->SetCurrentEventTargeterSourceHost(src_root_->GetHost());
if (in_out_event->IsLocatedEvent()) {
ui::LocatedEvent* located_event = in_out_event->AsLocatedEvent();
located_event->ConvertLocationToTarget(
static_cast<aura::Window*>(nullptr), dst_root_.get());
}
return dst_root_->GetHost()->GetEventSink();
}
return nullptr;
}
private:
raw_ptr<aura::Window> src_root_;
raw_ptr<aura::Window> dst_root_;
raw_ptr<AshWindowTreeHostDelegate> delegate_; // Not owned.
};
AshWindowTreeHostUnified::AshWindowTreeHostUnified(
const gfx::Rect& initial_bounds,
AshWindowTreeHostDelegate* delegate,
size_t compositor_memory_limit_mb)
: AshWindowTreeHostPlatform(
std::make_unique<ui::StubWindow>(initial_bounds),
delegate,
compositor_memory_limit_mb) {
ui::StubWindow* stub_window = static_cast<ui::StubWindow*>(platform_window());
stub_window->InitDelegate(this, true);
// TODO(b/356098565): Remove the log once the issue is fixed.
LOG(ERROR) << "Creating Unified Desktop bounds=" << initial_bounds.ToString();
}
AshWindowTreeHostUnified::~AshWindowTreeHostUnified() {
for (ash::AshWindowTreeHost* ash_host : mirroring_hosts_) {
ash_host->AsWindowTreeHost()->window()->RemoveObserver(this);
}
}
void AshWindowTreeHostUnified::PrepareForShutdown() {
AshWindowTreeHostPlatform::PrepareForShutdown();
for (ash::AshWindowTreeHost* host : mirroring_hosts_) {
host->PrepareForShutdown();
}
}
void AshWindowTreeHostUnified::RegisterMirroringHost(
AshWindowTreeHost* mirroring_ash_host) {
aura::Window* src_root = mirroring_ash_host->AsWindowTreeHost()->window();
src_root->SetEventTargeter(
std::make_unique<UnifiedEventTargeter>(src_root, window(), delegate_));
DCHECK(!base::Contains(mirroring_hosts_, mirroring_ash_host));
mirroring_hosts_.push_back(mirroring_ash_host);
src_root->AddObserver(this);
mirroring_ash_host->UpdateCursorConfig();
}
// Do nothing, since mirroring hosts had their cursor config updated when they
// were registered.
void AshWindowTreeHostUnified::UpdateCursorConfig() {}
void AshWindowTreeHostUnified::ClearCursorConfig() {
for (ash::AshWindowTreeHost* host : mirroring_hosts_) {
host->ClearCursorConfig();
}
}
void AshWindowTreeHostUnified::SetCursorNative(gfx::NativeCursor cursor) {
for (ash::AshWindowTreeHost* host : mirroring_hosts_) {
host->AsWindowTreeHost()->SetCursor(cursor);
}
}
void AshWindowTreeHostUnified::OnCursorVisibilityChangedNative(bool show) {
for (ash::AshWindowTreeHost* host : mirroring_hosts_) {
host->AsWindowTreeHost()->OnCursorVisibilityChanged(show);
}
}
void AshWindowTreeHostUnified::OnBoundsChanged(const BoundsChange& change) {
if (platform_window())
OnHostResizedInPixels(platform_window()->GetBoundsInPixels().size());
}
void AshWindowTreeHostUnified::OnWindowDestroying(aura::Window* window) {
auto iter = std::ranges::find(mirroring_hosts_, window,
[](AshWindowTreeHost* ash_host) {
return ash_host->AsWindowTreeHost()->window();
});
DCHECK(iter != mirroring_hosts_.end());
window->RemoveObserver(this);
mirroring_hosts_.erase(iter);
}
} // namespace ash
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