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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/extensions/chrome_v8_extension.h"
#include "base/logging.h"
#include "base/lazy_instance.h"
#include "base/stringprintf.h"
#include "base/string_util.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/extensions/extension_set.h"
#include "chrome/renderer/extensions/extension_dispatcher.h"
#include "content/renderer/render_view.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/base/resource/resource_bundle.h"
#include "v8/include/v8.h"
using WebKit::WebFrame;
using WebKit::WebView;
namespace {
const char kChromeHidden[] = "chromeHidden";
#ifndef NDEBUG
const char kValidateCallbacks[] = "validateCallbacks";
#endif
typedef std::map<int, std::string> StringMap;
static base::LazyInstance<StringMap> g_string_map(base::LINKER_INITIALIZED);
} // namespace
// static
const char* ChromeV8Extension::GetStringResource(int resource_id) {
StringMap* strings = g_string_map.Pointer();
StringMap::iterator it = strings->find(resource_id);
if (it == strings->end()) {
it = strings->insert(std::make_pair(
resource_id,
ResourceBundle::GetSharedInstance().GetRawDataResource(
resource_id).as_string())).first;
}
return it->second.c_str();
}
// static
RenderView* ChromeV8Extension::GetCurrentRenderView() {
WebFrame* webframe = WebFrame::frameForCurrentContext();
DCHECK(webframe) << "RetrieveCurrentFrame called when not in a V8 context.";
if (!webframe)
return NULL;
WebView* webview = webframe->view();
if (!webview)
return NULL; // can happen during closing
RenderView* renderview = RenderView::FromWebView(webview);
DCHECK(renderview) << "Encountered a WebView without a WebViewDelegate";
return renderview;
}
ChromeV8Extension::ChromeV8Extension(const char* name, int resource_id,
ExtensionDispatcher* extension_dispatcher)
: v8::Extension(name,
GetStringResource(resource_id),
0, // num dependencies
NULL), // dependencies array
extension_dispatcher_(extension_dispatcher) {
}
ChromeV8Extension::ChromeV8Extension(const char* name, int resource_id,
int dependency_count,
const char** dependencies,
ExtensionDispatcher* extension_dispatcher)
: v8::Extension(name,
GetStringResource(resource_id),
dependency_count,
dependencies),
extension_dispatcher_(extension_dispatcher) {
}
const Extension* ChromeV8Extension::GetExtensionForCurrentRenderView() const {
RenderView* renderview = GetCurrentRenderView();
if (!renderview)
return NULL; // this can happen as a tab is closing.
GURL url = renderview->webview()->mainFrame()->document().url();
const ExtensionSet* extensions = extension_dispatcher_->extensions();
if (!extensions->ExtensionBindingsAllowed(url))
return NULL;
return extensions->GetByURL(url);
}
bool ChromeV8Extension::CheckPermissionForCurrentRenderView(
const std::string& function_name) const {
const ::Extension* extension = GetExtensionForCurrentRenderView();
if (extension &&
extension_dispatcher_->IsExtensionActive(extension->id()) &&
extension->HasAPIPermission(function_name))
return true;
static const char kMessage[] =
"You do not have permission to use '%s'. Be sure to declare"
" in your manifest what permissions you need.";
std::string error_msg = base::StringPrintf(kMessage, function_name.c_str());
v8::ThrowException(v8::Exception::Error(v8::String::New(error_msg.c_str())));
return false;
}
v8::Handle<v8::FunctionTemplate>
ChromeV8Extension::GetNativeFunction(v8::Handle<v8::String> name) {
if (name->Equals(v8::String::New("GetChromeHidden"))) {
return v8::FunctionTemplate::New(GetChromeHidden);
}
if (name->Equals(v8::String::New("Print"))) {
return v8::FunctionTemplate::New(Print);
}
return v8::Handle<v8::FunctionTemplate>();
}
v8::Handle<v8::Value> ChromeV8Extension::GetChromeHidden(
const v8::Arguments& args) {
return GetChromeHidden(v8::Context::GetCurrent());
}
v8::Handle<v8::Value> ChromeV8Extension::GetChromeHidden(
const v8::Handle<v8::Context>& context) {
v8::Local<v8::Object> global = context->Global();
v8::Local<v8::Value> hidden = global->GetHiddenValue(
v8::String::New(kChromeHidden));
if (hidden.IsEmpty() || hidden->IsUndefined()) {
hidden = v8::Object::New();
global->SetHiddenValue(v8::String::New(kChromeHidden), hidden);
#ifndef NDEBUG
// Tell extension_process_bindings.js to validate callbacks and events
// against their schema definitions in api/extension_api.json.
v8::Local<v8::Object>::Cast(hidden)
->Set(v8::String::New(kValidateCallbacks), v8::True());
#endif
}
DCHECK(hidden->IsObject());
return v8::Local<v8::Object>::Cast(hidden);
}
v8::Handle<v8::Value> ChromeV8Extension::Print(const v8::Arguments& args) {
if (args.Length() < 1)
return v8::Undefined();
std::vector<std::string> components;
for (int i = 0; i < args.Length(); ++i)
components.push_back(*v8::String::Utf8Value(args[i]->ToString()));
LOG(ERROR) << JoinString(components, ',');
return v8::Undefined();
}
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