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// 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 "components/exo/notification_surface.h"
#include "components/exo/notification_surface_manager.h"
#include "components/exo/shell_surface_util.h"
#include "components/exo/surface.h"
#include "components/viz/host/host_frame_sink_manager.h"
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/gfx/geometry/rect.h"
namespace exo {
NotificationSurface::NotificationSurface(NotificationSurfaceManager* manager,
Surface* surface,
const std::string& notification_key)
: SurfaceTreeHost("ExoNotificationSurface"),
manager_(manager),
notification_key_(notification_key) {
surface->AddSurfaceObserver(this);
SetRootSurface(surface);
SetArcAppType(host_window());
host_window()->Show();
host_window()->AddObserver(this);
}
NotificationSurface::~NotificationSurface() {
if (host_window())
host_window()->RemoveObserver(this);
if (added_to_manager_)
manager_->RemoveSurface(this);
if (root_surface())
root_surface()->RemoveSurfaceObserver(this);
}
const gfx::Size& NotificationSurface::GetContentSize() const {
return root_surface()->content_size();
}
void NotificationSurface::SetApplicationId(const char* application_id) {
SetShellApplicationId(host_window(), base::make_optional(application_id));
}
void NotificationSurface::OnSurfaceCommit() {
SurfaceTreeHost::OnSurfaceCommit();
// Defer AddSurface until there are contents to show.
if (!added_to_manager_ && !host_window()->bounds().IsEmpty()) {
added_to_manager_ = true;
manager_->AddSurface(this);
}
// Only submit a compositor frame if the notification is being shown.
// Submitting compositor frames while invisible causes Viz to hold on to
// references to each notification buffer while it waits for an embedding (
// or a timeout occurs). This can cause buffer starvation on the Android side,
// leading to ANRs.
if (is_embedded_)
SubmitCompositorFrame();
}
void NotificationSurface::OnSurfaceDestroying(Surface* surface) {
DCHECK_EQ(surface, root_surface());
surface->RemoveSurfaceObserver(this);
SetRootSurface(nullptr);
}
void NotificationSurface::OnWindowDestroying(aura::Window* window) {
window->RemoveObserver(this);
}
void NotificationSurface::OnWindowAddedToRootWindow(aura::Window* window) {
SubmitCompositorFrame();
is_embedded_ = true;
}
void NotificationSurface::OnWindowRemovingFromRootWindow(
aura::Window* window,
aura::Window* new_root) {
if (!new_root) {
// Submit an empty compositor frame if the notification becomes invisible to
// notify Viz that it can release its reference to the existing notification
// buffer. We can't just evict the surface, because LayerTreeFrameSinkHolder
// needs to hold on to resources that were used in the previous frame, if it
// was associated with a different local surface id.
SubmitEmptyCompositorFrame();
// Evict the current surface. We can't only submit
// an empty compositor frame, because then when re-opening the message
// center, Viz may think it can use the empty compositor frame to display.
// This will force viz to wait the given deadline for the next notification
// compositor frame when showing the message center. This is to prevent
// flashes when opening the message center.
aura::Env::GetInstance()
->context_factory()
->GetHostFrameSinkManager()
->EvictSurfaces({host_window()->GetSurfaceId()});
// Allocate a new local surface id for the next compositor frame.
host_window()->AllocateLocalSurfaceId();
is_embedded_ = false;
// Set the deadline to default so Viz waits a while for the notification
// compositor frame to arrive before showing the message center.
host_window()->layer()->SetShowSurface(
host_window()->GetSurfaceId(), host_window()->bounds().size(),
SK_ColorWHITE, cc::DeadlinePolicy::UseDefaultDeadline(),
/*stretch_content_to_fill_bounds=*/false);
}
}
} // namespace exo
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