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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 "chrome/renderer/chrome_content_renderer_client.h"
#include "base/command_line.h"
#include "base/values.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/jstemplate_builder.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/url_constants.h"
#include "chrome/renderer/blocked_plugin.h"
#include "chrome/renderer/localized_error.h"
#include "chrome/renderer/render_thread.h"
#include "content/common/view_messages.h"
#include "content/renderer/render_view.h"
#include "grit/generated_resources.h"
#include "grit/locale_settings.h"
#include "grit/renderer_resources.h"
#include "net/base/net_errors.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginParams.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebURL.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebURLError.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebURLRequest.h"
#include "third_party/cld/encodings/compact_lang_det/win/cld_unicodetext.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "webkit/plugins/npapi/plugin_list.h"
#include "webkit/plugins/ppapi/plugin_module.h"
using WebKit::WebFrame;
using WebKit::WebPlugin;
using WebKit::WebPluginParams;
using WebKit::WebString;
using WebKit::WebURLError;
using WebKit::WebURLRequest;
using WebKit::WebURLResponse;
namespace chrome {
SkBitmap* ChromeContentRendererClient::GetSadPluginBitmap() {
return ResourceBundle::GetSharedInstance().GetBitmapNamed(IDR_SAD_PLUGIN);
}
std::string ChromeContentRendererClient::GetDefaultEncoding() {
return l10n_util::GetStringUTF8(IDS_DEFAULT_ENCODING);
}
WebPlugin* ChromeContentRendererClient::CreatePlugin(
RenderView* render_view,
WebFrame* frame,
const WebPluginParams& params) {
bool found = false;
int plugin_setting = CONTENT_SETTING_DEFAULT;
CommandLine* cmd = CommandLine::ForCurrentProcess();
webkit::npapi::WebPluginInfo info;
GURL url(params.url);
std::string actual_mime_type;
render_view->Send(new ViewHostMsg_GetPluginInfo(
render_view->routing_id(), url, frame->top()->url(),
params.mimeType.utf8(), &found, &info, &plugin_setting,
&actual_mime_type));
if (!found)
return NULL;
DCHECK(plugin_setting != CONTENT_SETTING_DEFAULT);
if (!webkit::npapi::IsPluginEnabled(info))
return NULL;
const webkit::npapi::PluginGroup* group =
webkit::npapi::PluginList::Singleton()->GetPluginGroup(info);
DCHECK(group != NULL);
if (group->IsVulnerable() &&
!cmd->HasSwitch(switches::kAllowOutdatedPlugins)) {
render_view->Send(new ViewHostMsg_BlockedOutdatedPlugin(
render_view->routing_id(), group->GetGroupName(),
GURL(group->GetUpdateURL())));
return CreatePluginPlaceholder(
render_view, frame, params, *group, IDR_BLOCKED_PLUGIN_HTML,
IDS_PLUGIN_OUTDATED, false);
}
ContentSetting host_setting = render_view->current_content_settings_.
settings[CONTENT_SETTINGS_TYPE_PLUGINS];
if (group->RequiresAuthorization() &&
!cmd->HasSwitch(switches::kAlwaysAuthorizePlugins) &&
(plugin_setting == CONTENT_SETTING_ALLOW ||
plugin_setting == CONTENT_SETTING_ASK) &&
host_setting == CONTENT_SETTING_DEFAULT) {
render_view->Send(new ViewHostMsg_BlockedOutdatedPlugin(
render_view->routing_id(), group->GetGroupName(), GURL()));
return CreatePluginPlaceholder(
render_view, frame, params, *group, IDR_BLOCKED_PLUGIN_HTML,
IDS_PLUGIN_NOT_AUTHORIZED, false);
}
if (info.path.value() == webkit::npapi::kDefaultPluginLibraryName ||
plugin_setting == CONTENT_SETTING_ALLOW ||
host_setting == CONTENT_SETTING_ALLOW) {
// Delay loading plugins if prerendering.
if (render_view->is_prerendering_) {
return CreatePluginPlaceholder(
render_view, frame, params, *group, IDR_CLICK_TO_PLAY_PLUGIN_HTML,
IDS_PLUGIN_LOAD, true);
}
scoped_refptr<webkit::ppapi::PluginModule> pepper_module(
render_view->pepper_delegate_.CreatePepperPlugin(info.path));
if (pepper_module) {
return render_view->CreatePepperPlugin(
frame, params, info.path, pepper_module.get());
}
return render_view->CreateNPAPIPlugin(
frame, params, info.path, actual_mime_type);
}
std::string resource;
if (cmd->HasSwitch(switches::kEnableResourceContentSettings))
resource = group->identifier();
render_view->DidBlockContentType(CONTENT_SETTINGS_TYPE_PLUGINS, resource);
if (plugin_setting == CONTENT_SETTING_ASK) {
return CreatePluginPlaceholder(
render_view, frame, params, *group, IDR_CLICK_TO_PLAY_PLUGIN_HTML,
IDS_PLUGIN_LOAD, false);
} else {
return CreatePluginPlaceholder(
render_view, frame, params, *group, IDR_BLOCKED_PLUGIN_HTML,
IDS_PLUGIN_BLOCKED, false);
}
}
WebPlugin* ChromeContentRendererClient::CreatePluginPlaceholder(
RenderView* render_view,
WebFrame* frame,
const WebPluginParams& params,
const webkit::npapi::PluginGroup& group,
int resource_id,
int message_id,
bool is_blocked_for_prerendering) {
// |blocked_plugin| will delete itself when the WebViewPlugin
// is destroyed.
BlockedPlugin* blocked_plugin =
new BlockedPlugin(render_view,
frame,
group,
params,
render_view->webkit_preferences(),
resource_id,
l10n_util::GetStringFUTF16(message_id,
group.GetGroupName()),
is_blocked_for_prerendering);
return blocked_plugin->plugin();
}
std::string ChromeContentRendererClient::GetNavigationErrorHtml(
const WebURLRequest& failed_request,
const WebURLError& error) {
GURL failed_url = error.unreachableURL;
std::string html;
const Extension* extension = NULL;
// Use a local error page.
int resource_id;
DictionaryValue error_strings;
if (failed_url.is_valid() && !failed_url.SchemeIs(chrome::kExtensionScheme))
extension = RenderThread::current()->GetExtensions()->GetByURL(failed_url);
if (extension) {
LocalizedError::GetAppErrorStrings(error, failed_url, extension,
&error_strings);
// TODO(erikkay): Should we use a different template for different
// error messages?
resource_id = IDR_ERROR_APP_HTML;
} else {
if (error.domain == WebString::fromUTF8(net::kErrorDomain) &&
error.reason == net::ERR_CACHE_MISS &&
EqualsASCII(failed_request.httpMethod(), "POST")) {
LocalizedError::GetFormRepostStrings(failed_url, &error_strings);
} else {
LocalizedError::GetStrings(error, &error_strings);
}
resource_id = IDR_NET_ERROR_HTML;
}
const base::StringPiece template_html(
ResourceBundle::GetSharedInstance().GetRawDataResource(resource_id));
if (template_html.empty()) {
NOTREACHED() << "unable to load template. ID: " << resource_id;
} else {
// "t" is the id of the templates root node.
html = jstemplate_builder::GetTemplatesHtml(
template_html, &error_strings, "t");
}
return html;
}
// Returns the ISO 639_1 language code of the specified |text|, or 'unknown'
// if it failed.
std::string ChromeContentRendererClient::DetermineTextLanguage(
const string16& text) {
std::string language = chrome::kUnknownLanguageCode;
int num_languages = 0;
int text_bytes = 0;
bool is_reliable = false;
Language cld_language =
DetectLanguageOfUnicodeText(NULL, text.c_str(), true, &is_reliable,
&num_languages, NULL, &text_bytes);
// We don't trust the result if the CLD reports that the detection is not
// reliable, or if the actual text used to detect the language was less than
// 100 bytes (short texts can often lead to wrong results).
if (is_reliable && text_bytes >= 100 && cld_language != NUM_LANGUAGES &&
cld_language != UNKNOWN_LANGUAGE && cld_language != TG_UNKNOWN_LANGUAGE) {
// We should not use LanguageCode_ISO_639_1 because it does not cover all
// the languages CLD can detect. As a result, it'll return the invalid
// language code for tradtional Chinese among others.
// |LanguageCodeWithDialect| will go through ISO 639-1, ISO-639-2 and
// 'other' tables to do the 'right' thing. In addition, it'll return zh-CN
// for Simplified Chinese.
language = LanguageCodeWithDialects(cld_language);
}
return language;
}
} // namespace chrome
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