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// Copyright 2015 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 "components/mus/view_tree_host_impl.h"
#include "base/strings/utf_string_conversions.h"
#include "components/mus/connection_manager.h"
#include "components/mus/display_manager.h"
#include "components/mus/focus_controller.h"
#include "components/mus/public/cpp/types.h"
#include "components/mus/view_tree_host_delegate.h"
#include "components/mus/view_tree_impl.h"
#include "mojo/common/common_type_converters.h"
#include "mojo/converters/geometry/geometry_type_converters.h"
namespace mus {
ViewTreeHostImpl::ViewTreeHostImpl(
mojo::ViewTreeHostClientPtr client,
ConnectionManager* connection_manager,
bool is_headless,
mojo::ApplicationImpl* app_impl,
const scoped_refptr<GpuState>& gpu_state,
const scoped_refptr<SurfacesState>& surfaces_state)
: delegate_(nullptr),
connection_manager_(connection_manager),
client_(client.Pass()),
event_dispatcher_(this),
display_manager_(DisplayManager::Create(is_headless,
app_impl,
gpu_state,
surfaces_state)),
focus_controller_(new FocusController(this)) {
display_manager_->Init(this);
if (client_) {
client_.set_connection_error_handler(
base::Bind(&ViewTreeHostImpl::OnClientClosed, base::Unretained(this)));
}
}
ViewTreeHostImpl::~ViewTreeHostImpl() {}
void ViewTreeHostImpl::Init(ViewTreeHostDelegate* delegate) {
delegate_ = delegate;
if (delegate_ && root_)
delegate_->OnDisplayInitialized();
}
ViewTreeImpl* ViewTreeHostImpl::GetViewTree() {
return delegate_ ? delegate_->GetViewTree() : nullptr;
}
bool ViewTreeHostImpl::IsViewAttachedToRoot(const ServerView* view) const {
return root_->Contains(view) && view != root_.get();
}
bool ViewTreeHostImpl::SchedulePaintIfInViewport(const ServerView* view,
const gfx::Rect& bounds) {
if (root_->Contains(view)) {
display_manager_->SchedulePaint(view, bounds);
return true;
}
return false;
}
const mojo::ViewportMetrics& ViewTreeHostImpl::GetViewportMetrics() const {
return display_manager_->GetViewportMetrics();
}
void ViewTreeHostImpl::SetFocusedView(ServerView* new_focused_view) {
ServerView* old_focused_view = focus_controller_->GetFocusedView();
if (old_focused_view == new_focused_view)
return;
DCHECK(root_view()->Contains(new_focused_view));
focus_controller_->SetFocusedView(new_focused_view);
// TODO(beng): have the FocusController notify us via FocusControllerDelegate.
OnFocusChanged(old_focused_view, new_focused_view);
}
ServerView* ViewTreeHostImpl::GetFocusedView() {
return focus_controller_->GetFocusedView();
}
void ViewTreeHostImpl::DestroyFocusController() {
focus_controller_.reset();
}
void ViewTreeHostImpl::UpdateTextInputState(ServerView* view,
const ui::TextInputState& state) {
// Do not need to update text input for unfocused views.
if (!display_manager_ || focus_controller_->GetFocusedView() != view)
return;
display_manager_->UpdateTextInputState(state);
}
void ViewTreeHostImpl::SetImeVisibility(ServerView* view, bool visible) {
// Do not need to show or hide IME for unfocused view.
if (focus_controller_->GetFocusedView() != view)
return;
display_manager_->SetImeVisibility(visible);
}
void ViewTreeHostImpl::OnAccelerator(uint32_t accelerator_id,
mojo::EventPtr event) {
client()->OnAccelerator(accelerator_id, event.Pass());
}
void ViewTreeHostImpl::DispatchInputEventToView(const ServerView* target,
mojo::EventPtr event) {
// If the view is an embed root, forward to the embedded view, not the owner.
ViewTreeImpl* connection =
connection_manager_->GetConnectionWithRoot(target->id());
if (!connection)
connection = connection_manager_->GetConnection(target->id().connection_id);
DCHECK_EQ(this, connection->GetHost());
connection->client()->OnViewInputEvent(ViewIdToTransportId(target->id()),
event.Pass(),
base::Bind(&base::DoNothing));
}
void ViewTreeHostImpl::SetSize(mojo::SizePtr size) {
display_manager_->SetViewportSize(size.To<gfx::Size>());
}
void ViewTreeHostImpl::SetTitle(const mojo::String& title) {
display_manager_->SetTitle(title.To<base::string16>());
}
void ViewTreeHostImpl::AddAccelerator(uint32_t id,
mojo::KeyboardCode keyboard_code,
mojo::EventFlags flags) {
event_dispatcher_.AddAccelerator(id, keyboard_code, flags);
}
void ViewTreeHostImpl::RemoveAccelerator(uint32_t id) {
event_dispatcher_.RemoveAccelerator(id);
}
void ViewTreeHostImpl::OnClientClosed() {
// |display_manager_.reset()| destroys the display-manager first, and then
// sets |display_manager_| to nullptr. However, destroying |display_manager_|
// can destroy the corresponding ViewTreeHostConnection, and |this|. So
// setting it to nullptr afterwards in reset() ends up writing on free'd
// memory. So transfer over to a local scoped_ptr<> before destroying it.
scoped_ptr<DisplayManager> temp = display_manager_.Pass();
}
ServerView* ViewTreeHostImpl::GetRootView() {
return root_.get();
}
void ViewTreeHostImpl::OnEvent(mojo::EventPtr event) {
event_dispatcher_.OnEvent(event.Pass());
}
void ViewTreeHostImpl::OnDisplayClosed() {
if (delegate_)
delegate_->OnDisplayClosed();
}
void ViewTreeHostImpl::OnViewportMetricsChanged(
const mojo::ViewportMetrics& old_metrics,
const mojo::ViewportMetrics& new_metrics) {
if (!root_) {
root_.reset(connection_manager_->CreateServerView(
RootViewId(connection_manager_->GetAndAdvanceNextHostId())));
root_->SetBounds(gfx::Rect(new_metrics.size_in_pixels.To<gfx::Size>()));
root_->SetVisible(true);
if (delegate_)
delegate_->OnDisplayInitialized();
} else {
root_->SetBounds(gfx::Rect(new_metrics.size_in_pixels.To<gfx::Size>()));
}
// TODO(fsamuel): We shouldn't broadcast this to all connections but only
// those within a window root.
connection_manager_->ProcessViewportMetricsChanged(old_metrics, new_metrics);
}
void ViewTreeHostImpl::OnFocusChanged(ServerView* old_focused_view,
ServerView* new_focused_view) {
// There are up to four connections that need to be notified:
// . the connection containing |old_focused_view|.
// . the connection with |old_focused_view| as its root.
// . the connection containing |new_focused_view|.
// . the connection with |new_focused_view| as its root.
// Some of these connections may be the same. The following takes care to
// notify each only once.
ViewTreeImpl* owning_connection_old = nullptr;
ViewTreeImpl* embedded_connection_old = nullptr;
if (old_focused_view) {
owning_connection_old = connection_manager_->GetConnection(
old_focused_view->id().connection_id);
if (owning_connection_old) {
owning_connection_old->ProcessFocusChanged(old_focused_view,
new_focused_view);
}
embedded_connection_old =
connection_manager_->GetConnectionWithRoot(old_focused_view->id());
if (embedded_connection_old) {
DCHECK_NE(owning_connection_old, embedded_connection_old);
embedded_connection_old->ProcessFocusChanged(old_focused_view,
new_focused_view);
}
}
ViewTreeImpl* owning_connection_new = nullptr;
ViewTreeImpl* embedded_connection_new = nullptr;
if (new_focused_view) {
owning_connection_new = connection_manager_->GetConnection(
new_focused_view->id().connection_id);
if (owning_connection_new &&
owning_connection_new != owning_connection_old &&
owning_connection_new != embedded_connection_old) {
owning_connection_new->ProcessFocusChanged(old_focused_view,
new_focused_view);
}
embedded_connection_new =
connection_manager_->GetConnectionWithRoot(new_focused_view->id());
if (embedded_connection_new &&
embedded_connection_new != owning_connection_old &&
embedded_connection_new != embedded_connection_old) {
DCHECK_NE(owning_connection_new, embedded_connection_new);
embedded_connection_new->ProcessFocusChanged(old_focused_view,
new_focused_view);
}
}
// Ensure that we always notify the root connection of a focus change.
ViewTreeImpl* root_tree = GetViewTree();
if (root_tree != owning_connection_old &&
root_tree != embedded_connection_old &&
root_tree != owning_connection_new &&
root_tree != embedded_connection_new) {
root_tree->ProcessFocusChanged(old_focused_view, new_focused_view);
}
UpdateTextInputState(new_focused_view, new_focused_view->text_input_state());
}
} // namespace mus
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