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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/browser/dom_ui/dom_ui_host.h"
#include "base/json_reader.h"
#include "base/json_writer.h"
#include "chrome/browser/browser.h"
#include "chrome/browser/navigation_entry.h"
#include "chrome/browser/tab_contents_type.h"
#include "chrome/browser/render_view_host.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.
type_ = TAB_CONTENTS_UNKNOWN_TYPE;
}
DOMUIHost::~DOMUIHost() {
STLDeleteContainerPairSecondPointers(message_callbacks_.begin(),
message_callbacks_.end());
STLDeleteContainerPointers(handlers_.begin(), handlers_.end());
}
bool DOMUIHost::CreateRenderView(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::CreateRenderView(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.
Value* value = NULL;
if (!content.empty()) {
if (!JSONReader::Read(content, &value, false)) {
// 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);
delete value;
}
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) {
// We're taking a string and making a javascript URL out of it. This means
// that escaping will follow the rules of a URL. Yet, the JSON text may have
// stuff in it that would be interpreted as escaped characters in a URL, but
// we want to preserve them literally.
//
// We just escape all the percents to avoid this, since when this javascript
// URL is interpreted, it will be unescaped.
std::wstring escaped_js(javascript);
ReplaceSubstringsAfterOffset(&escaped_js, 0, L"%", L"%25");
ExecuteJavascriptInWebFrame(L"", L"javascript:" + escaped_js);
}
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