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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/ui/webui/instant_ui.h"
#include "base/bind.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "grit/browser_resources.h"
namespace {
ChromeWebUIDataSource* CreateInstantHTMLSource() {
ChromeWebUIDataSource* source =
new ChromeWebUIDataSource(chrome::kChromeUIInstantHost);
source->set_json_path("strings.js");
source->add_resource_path("instant.js", IDR_INSTANT_JS);
source->add_resource_path("instant.css", IDR_INSTANT_CSS);
source->set_default_resource(IDR_INSTANT_HTML);
return source;
}
// This class receives JavaScript messages from the renderer.
// Note that the WebUI infrastructure runs on the UI thread, therefore all of
// this class's methods are expected to run on the UI thread.
class InstantUIMessageHandler
: public content::WebUIMessageHandler,
public base::SupportsWeakPtr<InstantUIMessageHandler> {
public:
InstantUIMessageHandler();
virtual ~InstantUIMessageHandler();
// WebUIMessageHandler implementation.
virtual void RegisterMessages() OVERRIDE;
static int slow_animation_scale_factor() {
return slow_animation_scale_factor_;
}
static bool show_search_provider_logo() {
return show_search_provider_logo_;
}
private:
void GetPreferenceValue(const base::ListValue* args);
void SetPreferenceValue(const base::ListValue* args);
// Slows down Instant animations by a time factor.
static int slow_animation_scale_factor_;
// True if search provider logo should be shown.
static bool show_search_provider_logo_;
DISALLOW_COPY_AND_ASSIGN(InstantUIMessageHandler);
};
// static
int InstantUIMessageHandler::slow_animation_scale_factor_ = 1;
bool InstantUIMessageHandler::show_search_provider_logo_ = false;
InstantUIMessageHandler::InstantUIMessageHandler() {}
InstantUIMessageHandler::~InstantUIMessageHandler() {}
void InstantUIMessageHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
"getPreferenceValue",
base::Bind(&InstantUIMessageHandler::GetPreferenceValue,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"setPreferenceValue",
base::Bind(&InstantUIMessageHandler::SetPreferenceValue,
base::Unretained(this)));
}
void InstantUIMessageHandler::GetPreferenceValue(const base::ListValue* args) {
std::string pref_name;
if (!args->GetString(0, &pref_name)) return;
base::StringValue pref_name_value(pref_name);
if (pref_name == prefs::kInstantAnimationScaleFactor) {
double value = 0.0;
#if defined(TOOLKIT_VIEWS)
value = slow_animation_scale_factor_;
#endif
base::FundamentalValue arg(value);
web_ui()->CallJavascriptFunction(
"instantConfig.getPreferenceValueResult", pref_name_value, arg);
} else if (pref_name == prefs::kInstantShowSearchProviderLogo) {
base::FundamentalValue arg(show_search_provider_logo_);
web_ui()->CallJavascriptFunction(
"instantConfig.getPreferenceValueResult", pref_name_value, arg);
} else if (pref_name == prefs::kExperimentalZeroSuggestUrlPrefix) {
PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
base::StringValue arg(prefs->GetString(pref_name.c_str()));
web_ui()->CallJavascriptFunction(
"instantConfig.getPreferenceValueResult", pref_name_value, arg);
}
}
void InstantUIMessageHandler::SetPreferenceValue(const base::ListValue* args) {
std::string pref_name;
if (!args->GetString(0, &pref_name)) return;
if (pref_name == prefs::kInstantAnimationScaleFactor) {
double value;
if (!args->GetDouble(1, &value))
return;
#if defined(TOOLKIT_VIEWS)
// Clamp to something reasonable.
value = std::max(0.1, std::min(value, 20.0));
slow_animation_scale_factor_ = static_cast<int>(value);
#else
NOTIMPLEMENTED();
#endif // defined(TOOLKIT_VIEWS)
} else if (pref_name == prefs::kInstantShowSearchProviderLogo) {
bool value;
if (!args->GetBoolean(1, &value))
return;
show_search_provider_logo_ = value;
} else if (pref_name == prefs::kExperimentalZeroSuggestUrlPrefix) {
std::string value;
if (!args->GetString(1, &value))
return;
PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
prefs->SetString(pref_name.c_str(), value);
}
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// InstantUI
InstantUI::InstantUI(content::WebUI* web_ui) : WebUIController(web_ui) {
web_ui->AddMessageHandler(new InstantUIMessageHandler());
// Set up the chrome://instant/ source.
Profile* profile = Profile::FromWebUI(web_ui);
ChromeURLDataManager::AddDataSource(profile, CreateInstantHTMLSource());
}
// static
int InstantUI::GetSlowAnimationScaleFactor() {
return InstantUIMessageHandler::slow_animation_scale_factor();
}
// static
bool InstantUI::ShouldShowSearchProviderLogo() {
return InstantUIMessageHandler::show_search_provider_logo();
}
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