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// Copyright (c) 2011 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 "content/browser/webui/web_ui.h"
#include "base/command_line.h"
#include "base/json/json_writer.h"
#include "base/stl_util.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "content/browser/child_process_security_policy.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "content/browser/tab_contents/tab_contents_view.h"
#include "content/browser/webui/generic_handler.h"
#include "content/common/view_messages.h"
#include "content/public/browser/web_ui_controller.h"
#include "content/public/common/bindings_policy.h"
#include "content/public/common/content_switches.h"
using content::WebContents;
using content::WebUIController;
using content::WebUIMessageHandler;
// static
string16 WebUI::GetJavascriptCall(
const std::string& function_name,
const std::vector<const Value*>& arg_list) {
string16 parameters;
std::string json;
for (size_t i = 0; i < arg_list.size(); ++i) {
if (i > 0)
parameters += char16(',');
base::JSONWriter::Write(arg_list[i], false, &json);
parameters += UTF8ToUTF16(json);
}
return ASCIIToUTF16(function_name) +
char16('(') + parameters + char16(')') + char16(';');
}
WebUI::WebUI(WebContents* contents,
WebUIController* controller)
: hide_favicon_(false),
focus_location_bar_by_default_(false),
should_hide_url_(false),
link_transition_type_(content::PAGE_TRANSITION_LINK),
bindings_(content::BINDINGS_POLICY_WEB_UI),
register_callback_overwrites_(false),
web_contents_(contents),
controller_(controller) {
DCHECK(contents);
AddMessageHandler(new GenericHandler());
}
WebUI::~WebUI() {
STLDeleteContainerPointers(handlers_.begin(), handlers_.end());
}
// WebUI, public: -------------------------------------------------------------
const WebUI::TypeID WebUI::kNoWebUI = NULL;
bool WebUI::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(WebUI, message)
IPC_MESSAGE_HANDLER(ViewHostMsg_WebUISend, OnWebUISend)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void WebUI::OnWebUISend(const GURL& source_url,
const std::string& message,
const ListValue& args) {
if (!ChildProcessSecurityPolicy::GetInstance()->
HasWebUIBindings(web_contents_->GetRenderProcessHost()->GetID())) {
NOTREACHED() << "Blocked unauthorized use of WebUIBindings.";
return;
}
if (controller_->OverrideHandleWebUIMessage(source_url, message,args))
return;
// Look up the callback for this message.
MessageCallbackMap::const_iterator callback =
message_callbacks_.find(message);
if (callback != message_callbacks_.end()) {
// Forward this message and content on.
callback->second.Run(&args);
}
}
void WebUI::RenderViewCreated(RenderViewHost* render_view_host) {
controller_->RenderViewCreated(render_view_host);
// Do not attempt to set the toolkit property if WebUI is not enabled, e.g.,
// the bookmarks manager page.
if (!(bindings_ & content::BINDINGS_POLICY_WEB_UI))
return;
#if defined(TOOLKIT_VIEWS)
render_view_host->SetWebUIProperty("toolkit", "views");
#elif defined(TOOLKIT_GTK)
render_view_host->SetWebUIProperty("toolkit", "GTK");
#endif // defined(TOOLKIT_VIEWS)
// Let the WebUI know that we're looking for UI that's optimized for touch
// input.
// TODO(rbyers) Figure out the right model for enabling touch-optimized UI
// (http://crbug.com/105380).
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTouchOptimizedUI))
render_view_host->SetWebUIProperty("touchOptimized", "true");
}
void WebUI::CallJavascriptFunction(const std::string& function_name) {
DCHECK(IsStringASCII(function_name));
string16 javascript = ASCIIToUTF16(function_name + "();");
ExecuteJavascript(javascript);
}
void WebUI::CallJavascriptFunction(const std::string& function_name,
const Value& arg) {
DCHECK(IsStringASCII(function_name));
std::vector<const Value*> args;
args.push_back(&arg);
ExecuteJavascript(WebUI::GetJavascriptCall(function_name, args));
}
void WebUI::CallJavascriptFunction(
const std::string& function_name,
const Value& arg1, const Value& arg2) {
DCHECK(IsStringASCII(function_name));
std::vector<const Value*> args;
args.push_back(&arg1);
args.push_back(&arg2);
ExecuteJavascript(WebUI::GetJavascriptCall(function_name, args));
}
void WebUI::CallJavascriptFunction(
const std::string& function_name,
const Value& arg1, const Value& arg2, const Value& arg3) {
DCHECK(IsStringASCII(function_name));
std::vector<const Value*> args;
args.push_back(&arg1);
args.push_back(&arg2);
args.push_back(&arg3);
ExecuteJavascript(WebUI::GetJavascriptCall(function_name, args));
}
void WebUI::CallJavascriptFunction(
const std::string& function_name,
const Value& arg1,
const Value& arg2,
const Value& arg3,
const Value& arg4) {
DCHECK(IsStringASCII(function_name));
std::vector<const Value*> args;
args.push_back(&arg1);
args.push_back(&arg2);
args.push_back(&arg3);
args.push_back(&arg4);
ExecuteJavascript(WebUI::GetJavascriptCall(function_name, args));
}
void WebUI::CallJavascriptFunction(
const std::string& function_name,
const std::vector<const Value*>& args) {
DCHECK(IsStringASCII(function_name));
ExecuteJavascript(WebUI::GetJavascriptCall(function_name, args));
}
void WebUI::RegisterMessageCallback(const std::string &message,
const MessageCallback& callback) {
std::pair<MessageCallbackMap::iterator, bool> result =
message_callbacks_.insert(std::make_pair(message, callback));
// Overwrite preexisting message callback mappings.
if (!result.second && register_callback_overwrites())
result.first->second = callback;
}
// WebUI, protected: ----------------------------------------------------------
void WebUI::AddMessageHandler(WebUIMessageHandler* handler) {
DCHECK(!handler->web_ui());
handler->set_web_ui(this);
handler->RegisterMessages();
handlers_.push_back(handler);
}
void WebUI::ExecuteJavascript(const string16& javascript) {
web_contents_->GetRenderViewHost()->ExecuteJavascriptInWebFrame(
ASCIIToUTF16(frame_xpath_), javascript);
}
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