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// Copyright 2012 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/ui/webui/ash/user_image/user_image_source.h"
#include "ash/constants/ash_features.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/escape.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "chrome/browser/ash/login/users/default_user_image/default_user_images.h"
#include "chrome/browser/browser_process.h"
#include "chrome/common/url_constants.h"
#include "components/account_id/account_id.h"
#include "components/user_manager/known_user.h"
#include "components/user_manager/user_manager.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/chromeos/resources/grit/ui_chromeos_resources.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/image/image_skia_rep.h"
#include "url/third_party/mozilla/url_parse.h"
namespace ash {
namespace {
// URL parameter specifying frame index.
const char kFrameIndex[] = "frame";
// Parses the user image URL, which looks like
// "chrome://userimage/serialized-user-id?key1=value1&...&key_n=value_n",
// to user email and frame.
void ParseRequest(const GURL& url, std::string* email, int* frame) {
DCHECK(url.is_valid());
const std::string serialized_account_id = base::UnescapeURLComponent(
url.path().substr(1),
base::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS |
base::UnescapeRule::PATH_SEPARATORS | base::UnescapeRule::SPACES);
AccountId account_id(EmptyAccountId());
// TODO(alemate): DCHECK(status) - should happen after options page is
// migrated.
if (auto deserialized = AccountId::Deserialize(serialized_account_id);
deserialized) {
account_id = *deserialized;
} else {
LOG(WARNING) << "Failed to deserialize account_id.";
user_manager::KnownUser known_user(g_browser_process->local_state());
account_id = known_user.GetAccountId(
serialized_account_id, std::string() /* id */, AccountType::UNKNOWN);
}
*email = account_id.GetUserEmail();
*frame = -1;
base::StringPairs parameters;
base::SplitStringIntoKeyValuePairs(url.query(), '=', '&', ¶meters);
for (base::StringPairs::const_iterator iter = parameters.begin();
iter != parameters.end(); ++iter) {
if (iter->first == kFrameIndex) {
unsigned value = 0;
if (!base::StringToUint(iter->second, &value)) {
LOG(WARNING) << "Invalid frame format: " << iter->second;
continue;
}
*frame = static_cast<int>(value);
break;
}
}
}
scoped_refptr<base::RefCountedMemory> LoadUserImageFrameForScaleFactor(
int resource_id,
int frame,
ui::ResourceScaleFactor scale_factor) {
// Load all frames.
if (frame == -1) {
return ui::ResourceBundle::GetSharedInstance()
.LoadDataResourceBytesForScale(resource_id, scale_factor);
}
// TODO(reveman): Add support for frames beyond 0 (crbug.com/750064).
if (frame) {
NOTIMPLEMENTED() << "Unsupported frame: " << frame;
return nullptr;
}
gfx::ImageSkia* image =
ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
float scale = ui::GetScaleForResourceScaleFactor(scale_factor);
std::optional<std::vector<uint8_t>> png_data =
gfx::PNGCodec::EncodeBGRASkBitmap(
image->GetRepresentation(scale).GetBitmap(),
/*discard_transparency=*/false);
return base::MakeRefCounted<base::RefCountedBytes>(
png_data.value_or(std::vector<uint8_t>()));
}
scoped_refptr<base::RefCountedMemory> GetUserImageFrame(
scoped_refptr<base::RefCountedMemory> image_bytes,
user_manager::UserImage::ImageFormat image_format,
int frame) {
// Return all frames.
if (frame == -1) {
return image_bytes;
}
// TODO(reveman): Add support for frames beyond 0 (crbug.com/750064).
if (frame) {
NOTIMPLEMENTED() << "Unsupported frame: " << frame;
return nullptr;
}
// Only PNGs can be animated.
if (image_format != user_manager::UserImage::FORMAT_PNG) {
return image_bytes;
}
// Extract first frame by re-encoding image.
SkBitmap bitmap = gfx::PNGCodec::Decode(*image_bytes);
if (bitmap.isNull()) {
return nullptr;
}
std::optional<std::vector<uint8_t>> encoded =
gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, /*discard_transparency=*/false);
return base::MakeRefCounted<base::RefCountedBytes>(
encoded.value_or(std::vector<uint8_t>()));
}
scoped_refptr<base::RefCountedMemory> GetUserImageInternal(
const AccountId& account_id,
int frame) {
const user_manager::User* user =
user_manager::UserManager::Get()->FindUser(account_id);
ui::ResourceScaleFactor scale_factor = ui::k100Percent;
// Use the scaling that matches primary display. These source images are
// 96x96 and often used at that size in WebUI pages.
display::Screen* screen = display::Screen::GetScreen();
if (screen) {
scale_factor = ui::GetSupportedResourceScaleFactor(
screen->GetPrimaryDisplay().device_scale_factor());
}
if (user) {
if (user->has_image_bytes()) {
if (user->image_format() == user_manager::UserImage::FORMAT_PNG ||
user->image_format() == user_manager::UserImage::FORMAT_WEBP) {
return GetUserImageFrame(user->image_bytes(), user->image_format(),
frame);
} else {
std::optional<std::vector<uint8_t>> encoded =
gfx::PNGCodec::EncodeBGRASkBitmap(*user->GetImage().bitmap(),
/*discard_transparency=*/false);
return base::MakeRefCounted<base::RefCountedBytes>(
encoded.value_or(std::vector<uint8_t>()));
}
}
if (user->image_is_stub()) {
return LoadUserImageFrameForScaleFactor(IDR_LOGIN_DEFAULT_USER, frame,
scale_factor);
}
NOTREACHED() << "User with custom image missing data bytes";
} else {
LOG(ERROR) << "User not found: " << account_id.GetUserEmail();
}
return LoadUserImageFrameForScaleFactor(IDR_LOGIN_DEFAULT_USER, frame,
scale_factor);
}
} // namespace
// Static.
scoped_refptr<base::RefCountedMemory> UserImageSource::GetUserImage(
const AccountId& account_id) {
return GetUserImageInternal(account_id, -1);
}
UserImageSource::UserImageSource() = default;
UserImageSource::~UserImageSource() = default;
std::string UserImageSource::GetSource() {
return chrome::kChromeUIUserImageHost;
}
void UserImageSource::StartDataRequest(
const GURL& url,
const content::WebContents::Getter& wc_getter,
content::URLDataSource::GotDataCallback callback) {
// TODO(crbug.com/40050262): Make sure |url| matches
// |chrome::kChromeUIUserImageURL| now that |url| is available.
const std::string path = content::URLDataSource::URLToRequestPath(url);
std::string email;
int frame = -1;
ParseRequest(url, &email, &frame);
const AccountId account_id(AccountId::FromUserEmail(email));
std::move(callback).Run(GetUserImageInternal(account_id, frame));
}
std::string UserImageSource::GetMimeType(const GURL& url) {
// We need to explicitly return a mime type, otherwise if the user tries to
// drag the image they get no extension.
return "image/png";
}
} // namespace ash
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