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// Copyright (c) 2006-2008 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/dom_ui/dom_ui_host.h"
#include "base/json_reader.h"
#include "base/json_writer.h"
#include "base/values.h"
#include "chrome/browser/browser.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/tab_contents/navigation_entry.h"
#include "chrome/browser/tab_contents/tab_contents_type.h"
DOMUIHost::DOMUIHost(Profile* profile,
SiteInstance* instance,
RenderViewHostFactory* render_view_factory)
: WebContents(profile,
instance,
render_view_factory,
MSG_ROUTING_NONE,
NULL) {
// Implementors of this class will have a specific tab contents type.
set_type(TAB_CONTENTS_UNKNOWN_TYPE);
}
DOMUIHost::~DOMUIHost() {
STLDeleteContainerPairSecondPointers(message_callbacks_.begin(),
message_callbacks_.end());
STLDeleteContainerPointers(handlers_.begin(), handlers_.end());
}
bool DOMUIHost::CreateRenderViewForRenderManager(
RenderViewHost* render_view_host) {
// Be sure to enable DOM UI bindings on the RenderViewHost before
// CreateRenderView is called. Since a cross-site transition may be
// involved, this may or may not be the same RenderViewHost that we had when
// we were created.
render_view_host->AllowDOMUIBindings();
return WebContents::CreateRenderViewForRenderManager(render_view_host);
}
void DOMUIHost::AddMessageHandler(DOMMessageHandler* handler) {
handlers_.push_back(handler);
}
void DOMUIHost::RegisterMessageCallback(const std::string& name,
MessageCallback* callback) {
message_callbacks_.insert(std::make_pair(name, callback));
}
void DOMUIHost::CallJavascriptFunction(const std::wstring& function_name,
const Value& arg) {
std::string json;
JSONWriter::Write(&arg, false, &json);
std::wstring javascript = function_name + L"(" + UTF8ToWide(json) + L");";
ExecuteJavascript(javascript);
}
void DOMUIHost::CallJavascriptFunction(
const std::wstring& function_name,
const Value& arg1, const Value& arg2) {
std::string json;
JSONWriter::Write(&arg1, false, &json);
std::wstring javascript = function_name + L"(" + UTF8ToWide(json);
JSONWriter::Write(&arg2, false, &json);
javascript += L"," + UTF8ToWide(json) + L");";
ExecuteJavascript(javascript);
}
void DOMUIHost::ProcessDOMUIMessage(const std::string& message,
const std::string& content) {
// Look up the callback for this message.
MessageCallbackMap::const_iterator callback(message_callbacks_.find(message));
if (callback == message_callbacks_.end())
return;
// Convert the content JSON into a Value.
scoped_ptr<Value> value;
if (!content.empty()) {
value.reset(JSONReader::Read(content, false));
if (!value.get()) {
// The page sent us something that we didn't understand.
// This probably indicates a programming error.
NOTREACHED();
return;
}
}
// Forward this message and content on.
callback->second->Run(value.get());
}
WebPreferences DOMUIHost::GetWebkitPrefs() {
// Get the users preferences then force image loading to always be on.
WebPreferences web_prefs = WebContents::GetWebkitPrefs();
web_prefs.loads_images_automatically = true;
return web_prefs;
}
void DOMUIHost::ExecuteJavascript(const std::wstring& javascript) {
render_view_host()->ExecuteJavascriptInWebFrame(std::wstring(), javascript);
}
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