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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/apps/app_service/app_icon/app_icon_util.h"
#include "ash/public/cpp/shelf_types.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/no_destructor.h"
#include "base/strings/stringprintf.h"
#include "base/task/thread_pool.h"
#include "chrome/browser/apps/app_service/app_icon/dip_px_util.h"
#include "components/services/app_service/public/cpp/icon_effects.h"
#include "services/data_decoder/public/cpp/data_decoder.h"
#include "ui/base/resource/resource_scale_factor.h"
#include "ui/gfx/geometry/size.h"
namespace {
constexpr char kAppService[] = "app_service";
constexpr char kIcon[] = "icons";
// Template for the icon name.
constexpr char kIconNameTemplate[] = "%d.png";
constexpr char kMaskableIconNameTemplate[] = "mask_%d.png";
constexpr char kForegroundIconNameTemplate[] = "foreground_%d.png";
constexpr char kBackgroundIconNameTemplate[] = "background_%d.png";
} // namespace
namespace apps {
data_decoder::DataDecoder& GetIconDataDecoder() {
static base::NoDestructor<data_decoder::DataDecoder> data_decoder;
return *data_decoder;
}
base::FilePath GetIconFolderPath(const base::FilePath& base_path,
const std::string& app_id) {
return base_path.AppendASCII(kAppService)
.AppendASCII(kIcon)
.AppendASCII(app_id);
}
base::FilePath GetIconPath(const base::FilePath& base_path,
const std::string& app_id,
int32_t icon_size_in_px,
bool is_maskable_icon) {
// For a maskable icon, the icon file name is mask_%d.png.
// For a non-maskable icon, the icon file name is %d.png.
auto icon_file_name =
is_maskable_icon
? base::StringPrintf(kMaskableIconNameTemplate, icon_size_in_px)
: base::StringPrintf(kIconNameTemplate, icon_size_in_px);
return GetIconFolderPath(base_path, app_id).AppendASCII(icon_file_name);
}
base::FilePath GetForegroundIconPath(const base::FilePath& base_path,
const std::string& app_id,
int32_t icon_size_in_px) {
auto icon_file_name =
base::StringPrintf(kForegroundIconNameTemplate, icon_size_in_px);
return GetIconFolderPath(base_path, app_id).AppendASCII(icon_file_name);
}
base::FilePath GetBackgroundIconPath(const base::FilePath& base_path,
const std::string& app_id,
int32_t icon_size_in_px) {
auto icon_file_name =
base::StringPrintf(kBackgroundIconNameTemplate, icon_size_in_px);
return GetIconFolderPath(base_path, app_id).AppendASCII(icon_file_name);
}
bool IsAdaptiveIcon(const base::FilePath& base_path,
const std::string& app_id,
int32_t size_in_dip) {
for (const auto scale_factor : ui::GetSupportedResourceScaleFactors()) {
int icon_size_in_px = apps_util::ConvertDipToPxForScale(
size_in_dip, ui::GetScaleForResourceScaleFactor(scale_factor));
const auto foreground_icon_path =
apps::GetForegroundIconPath(base_path, app_id, icon_size_in_px);
const auto background_icon_path =
apps::GetBackgroundIconPath(base_path, app_id, icon_size_in_px);
if (!IsAdaptiveIcon(foreground_icon_path, background_icon_path)) {
return false;
}
}
return true;
}
bool IsAdaptiveIcon(const base::FilePath& foreground_icon_path,
const base::FilePath& background_icon_path) {
return !foreground_icon_path.empty() && !background_icon_path.empty() &&
base::PathExists(foreground_icon_path) &&
base::PathExists(background_icon_path);
}
bool HasAdaptiveIconData(const IconValuePtr& iv) {
return iv && !iv->foreground_icon_png_data.empty() &&
!iv->background_icon_png_data.empty();
}
IconValuePtr ReadOnBackgroundThread(const base::FilePath& base_path,
const std::string& app_id,
int32_t icon_size_in_px) {
auto iv = std::make_unique<IconValue>();
iv->icon_type = IconType::kCompressed;
iv->is_maskable_icon = true;
// Use the maskable icon if possible.
auto icon_path = apps::GetIconPath(base_path, app_id, icon_size_in_px,
/*is_maskable_icon=*/true);
if (icon_path.empty() || !base::PathExists(icon_path)) {
// If there isn't a maskable icon file, read the non-maskable icon file.
iv->is_maskable_icon = false;
icon_path = apps::GetIconPath(base_path, app_id, icon_size_in_px,
/*is_maskable_icon=*/false);
if (icon_path.empty() || !base::PathExists(icon_path)) {
// The icon might have foreground/background icon files for some scale
// factors, then we can use the foreground icon file for this scale.
icon_path = GetForegroundIconPath(base_path, app_id, icon_size_in_px);
if (icon_path.empty() || !base::PathExists(icon_path)) {
return nullptr;
}
}
}
std::string unsafe_icon_data;
if (!base::ReadFileToString(icon_path, &unsafe_icon_data)) {
return nullptr;
}
iv->compressed = {unsafe_icon_data.begin(), unsafe_icon_data.end()};
return iv;
}
IconValuePtr ReadAdaptiveIconOnBackgroundThread(const base::FilePath& base_path,
const std::string& app_id,
int32_t icon_size_in_px) {
auto iv = std::make_unique<IconValue>();
iv->icon_type = IconType::kCompressed;
const auto foreground_icon_path =
apps::GetForegroundIconPath(base_path, app_id, icon_size_in_px);
const auto background_icon_path =
apps::GetBackgroundIconPath(base_path, app_id, icon_size_in_px);
if (IsAdaptiveIcon(foreground_icon_path, background_icon_path)) {
std::string foreground_icon_data;
std::string background_icon_data;
if (base::ReadFileToString(foreground_icon_path, &foreground_icon_data) &&
base::ReadFileToString(background_icon_path, &background_icon_data)) {
iv->foreground_icon_png_data = {foreground_icon_data.begin(),
foreground_icon_data.end()};
iv->background_icon_png_data = {background_icon_data.begin(),
background_icon_data.end()};
return iv;
}
}
return nullptr;
}
std::map<ui::ResourceScaleFactor, IconValuePtr> ReadIconFilesOnBackgroundThread(
const base::FilePath& base_path,
const std::string& app_id,
int32_t size_in_dip) {
std::map<ui::ResourceScaleFactor, IconValuePtr> result;
for (const auto scale_factor : ui::GetSupportedResourceScaleFactors()) {
int icon_size_in_px = apps_util::ConvertDipToPxForScale(
size_in_dip, ui::GetScaleForResourceScaleFactor(scale_factor));
// If some scales have non-adaptive icons, we can't generate the adaptive
// icon for all scales. We still get the foregound/background icon data for
// the mix scenario, and decode the foreground icon data only, as done in
// AppIconDecoder.
auto iv =
ReadAdaptiveIconOnBackgroundThread(base_path, app_id, icon_size_in_px);
result[scale_factor] =
iv ? std::move(iv)
: ReadOnBackgroundThread(base_path, app_id, icon_size_in_px);
}
return result;
}
void ScheduleIconFoldersDeletion(const base::FilePath& base_path,
const std::vector<std::string>& ids,
base::OnceCallback<void()> callback) {
base::ThreadPool::PostTaskAndReply(
FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_BLOCKING},
base::BindOnce(
[](const base::FilePath& base_path,
const std::vector<std::string>& ids) {
for (const auto& id : ids) {
base::DeletePathRecursively(GetIconFolderPath(base_path, id));
}
},
base_path, ids),
std::move(callback));
}
} // namespace apps
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