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// Copyright 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 "chrome/browser/media/webrtc/desktop_media_list_ash.h"
#include <utility>
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/shell.h"
#include "ash/wm/desks/desks_util.h"
#include "base/bind.h"
#include "chrome/grit/generated_resources.h"
#include "media/base/video_util.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/image/image.h"
#include "ui/snapshot/snapshot.h"
using content::DesktopMediaID;
namespace {
// Update the list twice per second.
const int kDefaultDesktopMediaListUpdatePeriod = 500;
} // namespace
DesktopMediaListAsh::DesktopMediaListAsh(content::DesktopMediaID::Type type)
: DesktopMediaListBase(base::TimeDelta::FromMilliseconds(
kDefaultDesktopMediaListUpdatePeriod)) {
DCHECK(type == content::DesktopMediaID::TYPE_SCREEN ||
type == content::DesktopMediaID::TYPE_WINDOW);
type_ = type;
}
DesktopMediaListAsh::~DesktopMediaListAsh() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void DesktopMediaListAsh::Refresh(bool update_thumnails) {
DCHECK(can_refresh());
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK_EQ(pending_window_capture_requests_, 0);
std::vector<SourceDescription> new_sources;
EnumerateSources(&new_sources, update_thumnails);
UpdateSourcesList(new_sources);
OnRefreshMaybeComplete();
}
void DesktopMediaListAsh::EnumerateWindowsForRoot(
std::vector<DesktopMediaListAsh::SourceDescription>* sources,
bool update_thumnails,
aura::Window* root_window,
int container_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
aura::Window* container = ash::Shell::GetContainer(root_window, container_id);
if (!container)
return;
// The |container| has all the top-level windows in reverse order, e.g. the
// most top-level window is at the end. So iterate children reversely to make
// sure |sources| is in the expected order.
for (aura::Window::Windows::const_reverse_iterator it =
container->children().rbegin();
it != container->children().rend(); ++it) {
if (!(*it)->IsVisible() || !(*it)->CanFocus())
continue;
content::DesktopMediaID id = content::DesktopMediaID::RegisterNativeWindow(
content::DesktopMediaID::TYPE_WINDOW, *it);
if (id.window_id == view_dialog_id_.window_id)
continue;
SourceDescription window_source(id, (*it)->GetTitle());
sources->push_back(window_source);
if (update_thumnails)
CaptureThumbnail(window_source.id, *it);
}
}
void DesktopMediaListAsh::EnumerateSources(
std::vector<DesktopMediaListAsh::SourceDescription>* sources,
bool update_thumnails) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
aura::Window::Windows root_windows = ash::Shell::GetAllRootWindows();
for (size_t i = 0; i < root_windows.size(); ++i) {
if (type_ == content::DesktopMediaID::TYPE_SCREEN) {
SourceDescription screen_source(
content::DesktopMediaID::RegisterNativeWindow(
content::DesktopMediaID::TYPE_SCREEN, root_windows[i]),
root_windows[i]->GetTitle());
if (root_windows[i] == ash::Shell::GetPrimaryRootWindow())
sources->insert(sources->begin(), screen_source);
else
sources->push_back(screen_source);
if (screen_source.name.empty()) {
if (root_windows.size() > 1) {
// 'Screen' in 'Screen 1, Screen 2, etc ' might be inflected in some
// languages depending on the number although rather unlikely. To be
// safe, use the plural format.
// TODO(jshin): Revert to GetStringFUTF16Int (with native digits)
// if none of UI languages inflects 'Screen' in this context.
screen_source.name = l10n_util::GetPluralStringFUTF16(
IDS_DESKTOP_MEDIA_PICKER_MULTIPLE_SCREEN_NAME,
static_cast<int>(i + 1));
} else {
screen_source.name = l10n_util::GetStringUTF16(
IDS_DESKTOP_MEDIA_PICKER_SINGLE_SCREEN_NAME);
}
}
if (update_thumnails)
CaptureThumbnail(screen_source.id, root_windows[i]);
} else {
// The list of desks containers depends on whether the Virtual Desks
// feature is enabled or not.
for (int desk_id : ash::desks_util::GetDesksContainersIds())
EnumerateWindowsForRoot(sources, update_thumnails, root_windows[i],
desk_id);
EnumerateWindowsForRoot(sources, update_thumnails, root_windows[i],
ash::kShellWindowId_AlwaysOnTopContainer);
EnumerateWindowsForRoot(sources, update_thumnails, root_windows[i],
ash::kShellWindowId_PipContainer);
}
}
}
void DesktopMediaListAsh::CaptureThumbnail(content::DesktopMediaID id,
aura::Window* window) {
gfx::Rect window_rect(window->bounds().width(), window->bounds().height());
gfx::Rect scaled_rect = media::ComputeLetterboxRegion(
gfx::Rect(thumbnail_size_), window_rect.size());
++pending_window_capture_requests_;
ui::GrabWindowSnapshotAndScaleAsync(
window, window_rect, scaled_rect.size(),
base::Bind(&DesktopMediaListAsh::OnThumbnailCaptured,
weak_factory_.GetWeakPtr(), id));
}
void DesktopMediaListAsh::OnThumbnailCaptured(content::DesktopMediaID id,
gfx::Image image) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
UpdateSourceThumbnail(id, image.AsImageSkia());
--pending_window_capture_requests_;
DCHECK_GE(pending_window_capture_requests_, 0);
OnRefreshMaybeComplete();
}
void DesktopMediaListAsh::OnRefreshMaybeComplete() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (pending_window_capture_requests_ == 0) {
// Once we've finished capturing all windows, notify the caller, which will
// post a task for the next list update if necessary.
OnRefreshComplete();
}
}
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