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// Copyright (c) 2012 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/themes/theme_service.h"
#include "base/bind.h"
#include "base/memory/ref_counted_memory.h"
#include "base/prefs/pref_service.h"
#include "base/sequenced_task_runner.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_system.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/themes/browser_theme_pack.h"
#include "chrome/browser/themes/theme_properties.h"
#include "chrome/browser/themes/theme_syncable_service.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/extensions/extension_manifest_constants.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/user_metrics.h"
#include "grit/theme_resources.h"
#include "grit/ui_resources.h"
#include "ui/base/layout.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/image/image_skia.h"
#if defined(OS_WIN)
#include "ui/base/win/shell.h"
#endif
#if defined(USE_AURA) && !defined(USE_ASH) && defined(OS_LINUX)
#include "ui/linux_ui/linux_ui.h"
#endif
using content::BrowserThread;
using content::UserMetricsAction;
using extensions::Extension;
using ui::ResourceBundle;
typedef ThemeProperties Properties;
// The default theme if we haven't installed a theme yet or if we've clicked
// the "Use Classic" button.
const char* ThemeService::kDefaultThemeID = "";
namespace {
// The default theme if we've gone to the theme gallery and installed the
// "Default" theme. We have to detect this case specifically. (By the time we
// realize we've installed the default theme, we already have an extension
// unpacked on the filesystem.)
const char* kDefaultThemeGalleryID = "hkacjpbfdknhflllbcmjibkdeoafencn";
SkColor TintForUnderline(SkColor input) {
return SkColorSetA(input, SkColorGetA(input) / 3);
}
SkColor IncreaseLightness(SkColor color, double percent) {
color_utils::HSL result;
color_utils::SkColorToHSL(color, &result);
result.l += (1 - result.l) * percent;
return color_utils::HSLToSkColor(result, SkColorGetA(color));
}
// Writes the theme pack to disk on a separate thread.
void WritePackToDiskCallback(BrowserThemePack* pack,
const base::FilePath& path) {
if (!pack->WriteToDisk(path))
NOTREACHED() << "Could not write theme pack to disk";
}
} // namespace
ThemeService::ThemeService()
: rb_(ResourceBundle::GetSharedInstance()),
profile_(NULL),
ready_(false),
number_of_infobars_(0) {
}
ThemeService::~ThemeService() {
FreePlatformCaches();
}
void ThemeService::Init(Profile* profile) {
DCHECK(CalledOnValidThread());
profile_ = profile;
LoadThemePrefs();
if (!ready_) {
registrar_.Add(this,
chrome::NOTIFICATION_EXTENSIONS_READY,
content::Source<Profile>(profile_));
}
theme_syncable_service_.reset(new ThemeSyncableService(profile_, this));
}
gfx::Image ThemeService::GetImageNamed(int id) const {
DCHECK(CalledOnValidThread());
gfx::Image image;
if (theme_pack_.get())
image = theme_pack_->GetImageNamed(id);
#if defined(USE_AURA) && !defined(USE_ASH) && defined(OS_LINUX)
const ui::LinuxUI* linux_ui = ui::LinuxUI::instance();
if (image.IsEmpty() && linux_ui)
image = linux_ui->GetThemeImageNamed(id);
#endif
if (image.IsEmpty())
image = rb_.GetNativeImageNamed(id);
return image;
}
gfx::ImageSkia* ThemeService::GetImageSkiaNamed(int id) const {
gfx::Image image = GetImageNamed(id);
if (image.IsEmpty())
return NULL;
// TODO(pkotwicz): Remove this const cast. The gfx::Image interface returns
// its images const. GetImageSkiaNamed() also should but has many callsites.
return const_cast<gfx::ImageSkia*>(image.ToImageSkia());
}
SkColor ThemeService::GetColor(int id) const {
DCHECK(CalledOnValidThread());
SkColor color;
if (theme_pack_.get() && theme_pack_->GetColor(id, &color))
return color;
#if defined(USE_AURA) && !defined(USE_ASH) && defined(OS_LINUX)
const ui::LinuxUI* linux_ui = ui::LinuxUI::instance();
if (linux_ui && linux_ui->GetColor(id, &color))
return color;
#endif
// For backward compat with older themes, some newer colors are generated from
// older ones if they are missing.
switch (id) {
case Properties::COLOR_NTP_SECTION_HEADER_TEXT:
return IncreaseLightness(GetColor(Properties::COLOR_NTP_TEXT), 0.30);
case Properties::COLOR_NTP_SECTION_HEADER_TEXT_HOVER:
return GetColor(Properties::COLOR_NTP_TEXT);
case Properties::COLOR_NTP_SECTION_HEADER_RULE:
return IncreaseLightness(GetColor(Properties::COLOR_NTP_TEXT), 0.70);
case Properties::COLOR_NTP_SECTION_HEADER_RULE_LIGHT:
return IncreaseLightness(GetColor(Properties::COLOR_NTP_TEXT), 0.86);
case Properties::COLOR_NTP_TEXT_LIGHT:
return IncreaseLightness(GetColor(Properties::COLOR_NTP_TEXT), 0.40);
}
return Properties::GetDefaultColor(id);
}
bool ThemeService::GetDisplayProperty(int id, int* result) const {
if (theme_pack_.get())
return theme_pack_->GetDisplayProperty(id, result);
return Properties::GetDefaultDisplayProperty(id, result);
}
bool ThemeService::ShouldUseNativeFrame() const {
if (HasCustomImage(IDR_THEME_FRAME))
return false;
#if defined(OS_WIN)
return ui::win::IsAeroGlassEnabled();
#else
return false;
#endif
}
bool ThemeService::HasCustomImage(int id) const {
if (!Properties::IsThemeableImage(id))
return false;
if (theme_pack_)
return theme_pack_->HasCustomImage(id);
return false;
}
base::RefCountedMemory* ThemeService::GetRawData(
int id,
ui::ScaleFactor scale_factor) const {
// Check to see whether we should substitute some images.
int ntp_alternate;
GetDisplayProperty(Properties::NTP_LOGO_ALTERNATE, &ntp_alternate);
if (id == IDR_PRODUCT_LOGO && ntp_alternate != 0)
id = IDR_PRODUCT_LOGO_WHITE;
base::RefCountedMemory* data = NULL;
if (theme_pack_.get())
data = theme_pack_->GetRawData(id, scale_factor);
if (!data)
data = rb_.LoadDataResourceBytesForScale(id, ui::SCALE_FACTOR_100P);
return data;
}
void ThemeService::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK(type == chrome::NOTIFICATION_EXTENSIONS_READY);
registrar_.Remove(this, chrome::NOTIFICATION_EXTENSIONS_READY,
content::Source<Profile>(profile_));
MigrateTheme();
set_ready();
// Send notification in case anyone requested data and cached it when the
// theme service was not ready yet.
NotifyThemeChanged();
}
void ThemeService::SetTheme(const Extension* extension) {
// Clear our image cache.
FreePlatformCaches();
DCHECK(extension);
DCHECK(extension->is_theme());
if (DCHECK_IS_ON()) {
ExtensionService* service =
extensions::ExtensionSystem::Get(profile_)->extension_service();
DCHECK(service);
DCHECK(service->GetExtensionById(extension->id(), false));
}
BuildFromExtension(extension);
SaveThemeID(extension->id());
NotifyThemeChanged();
content::RecordAction(UserMetricsAction("Themes_Installed"));
}
void ThemeService::RemoveUnusedThemes() {
if (!profile_)
return;
ExtensionService* service = profile_->GetExtensionService();
if (!service)
return;
std::string current_theme = GetThemeID();
std::vector<std::string> remove_list;
const ExtensionSet* extensions = service->extensions();
for (ExtensionSet::const_iterator it = extensions->begin();
it != extensions->end(); ++it) {
if ((*it)->is_theme() && (*it)->id() != current_theme) {
remove_list.push_back((*it)->id());
}
}
for (size_t i = 0; i < remove_list.size(); ++i)
service->UninstallExtension(remove_list[i], false, NULL);
}
void ThemeService::UseDefaultTheme() {
ClearAllThemeData();
NotifyThemeChanged();
content::RecordAction(UserMetricsAction("Themes_Reset"));
}
void ThemeService::SetNativeTheme() {
UseDefaultTheme();
}
bool ThemeService::UsingDefaultTheme() const {
std::string id = GetThemeID();
return id == ThemeService::kDefaultThemeID ||
id == kDefaultThemeGalleryID;
}
bool ThemeService::UsingNativeTheme() const {
return UsingDefaultTheme();
}
std::string ThemeService::GetThemeID() const {
return profile_->GetPrefs()->GetString(prefs::kCurrentThemeID);
}
color_utils::HSL ThemeService::GetTint(int id) const {
DCHECK(CalledOnValidThread());
color_utils::HSL hsl;
if (theme_pack_.get() && theme_pack_->GetTint(id, &hsl))
return hsl;
return ThemeProperties::GetDefaultTint(id);
}
void ThemeService::ClearAllThemeData() {
// Clear our image cache.
FreePlatformCaches();
theme_pack_ = NULL;
profile_->GetPrefs()->ClearPref(prefs::kCurrentThemePackFilename);
SaveThemeID(kDefaultThemeID);
RemoveUnusedThemes();
}
void ThemeService::LoadThemePrefs() {
PrefService* prefs = profile_->GetPrefs();
std::string current_id = GetThemeID();
if (current_id == kDefaultThemeID) {
set_ready();
return;
}
bool loaded_pack = false;
// If we don't have a file pack, we're updating from an old version.
base::FilePath path = prefs->GetFilePath(prefs::kCurrentThemePackFilename);
if (path != base::FilePath()) {
theme_pack_ = BrowserThemePack::BuildFromDataPack(path, current_id);
loaded_pack = theme_pack_.get() != NULL;
}
if (loaded_pack) {
content::RecordAction(UserMetricsAction("Themes.Loaded"));
set_ready();
} else {
// TODO(erg): We need to pop up a dialog informing the user that their
// theme is being migrated.
ExtensionService* service =
extensions::ExtensionSystem::Get(profile_)->extension_service();
if (service && service->is_ready()) {
MigrateTheme();
set_ready();
}
}
}
void ThemeService::NotifyThemeChanged() {
DVLOG(1) << "Sending BROWSER_THEME_CHANGED";
// Redraw!
content::NotificationService* service =
content::NotificationService::current();
service->Notify(chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
content::Source<ThemeService>(this),
content::NotificationService::NoDetails());
#if defined(OS_MACOSX)
NotifyPlatformThemeChanged();
#endif // OS_MACOSX
// Notify sync that theme has changed.
if (theme_syncable_service_.get()) {
theme_syncable_service_->OnThemeChange();
}
}
#if defined(OS_WIN) || defined(USE_AURA)
void ThemeService::FreePlatformCaches() {
// Views (Skia) has no platform image cache to clear.
}
#endif
void ThemeService::MigrateTheme() {
ExtensionService* service =
extensions::ExtensionSystem::Get(profile_)->extension_service();
const Extension* extension = service ?
service->GetExtensionById(GetThemeID(), false) : NULL;
if (extension) {
DLOG(ERROR) << "Migrating theme";
BuildFromExtension(extension);
content::RecordAction(UserMetricsAction("Themes.Migrated"));
} else {
DLOG(ERROR) << "Theme is mysteriously gone.";
ClearAllThemeData();
content::RecordAction(UserMetricsAction("Themes.Gone"));
}
}
void ThemeService::SavePackName(const base::FilePath& pack_path) {
profile_->GetPrefs()->SetFilePath(
prefs::kCurrentThemePackFilename, pack_path);
}
void ThemeService::SaveThemeID(const std::string& id) {
profile_->GetPrefs()->SetString(prefs::kCurrentThemeID, id);
}
void ThemeService::BuildFromExtension(const Extension* extension) {
scoped_refptr<BrowserThemePack> pack(
BrowserThemePack::BuildFromExtension(extension));
if (!pack.get()) {
// TODO(erg): We've failed to install the theme; perhaps we should tell the
// user? http://crbug.com/34780
LOG(ERROR) << "Could not load theme.";
return;
}
ExtensionService* service =
extensions::ExtensionSystem::Get(profile_)->extension_service();
if (!service)
return;
// Write the packed file to disk.
base::FilePath pack_path =
extension->path().Append(chrome::kThemePackFilename);
service->GetFileTaskRunner()->PostTask(
FROM_HERE,
base::Bind(&WritePackToDiskCallback, pack, pack_path));
SavePackName(pack_path);
theme_pack_ = pack;
}
void ThemeService::OnInfobarDisplayed() {
number_of_infobars_++;
}
void ThemeService::OnInfobarDestroyed() {
number_of_infobars_--;
if (number_of_infobars_ == 0)
RemoveUnusedThemes();
}
ThemeSyncableService* ThemeService::GetThemeSyncableService() const {
return theme_syncable_service_.get();
}
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