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// Copyright (c) 2009 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/extension_process_bindings.h"
#include "base/singleton.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/url_constants.h"
#include "chrome/renderer/extensions/bindings_utils.h"
#include "chrome/renderer/extensions/event_bindings.h"
#include "chrome/renderer/extensions/renderer_extension_bindings.h"
#include "chrome/renderer/js_only_v8_extensions.h"
#include "chrome/renderer/render_view.h"
#include "grit/renderer_resources.h"
#include "webkit/api/public/WebScriptSource.h"
#include "webkit/glue/webframe.h"
using WebKit::WebScriptSource;
using WebKit::WebString;
namespace {
const char kExtensionName[] = "chrome/ExtensionProcessBindings";
const char* kExtensionDeps[] = {
BaseJsV8Extension::kName,
EventBindings::kName,
JsonJsV8Extension::kName,
JsonSchemaJsV8Extension::kName,
RendererExtensionBindings::kName,
};
// Types for storage of per-renderer-singleton data structure that maps
// |extension_id| -> <List of v8 Contexts for the "views" of that extension>
typedef std::list< v8::Persistent<v8::Context> > ContextList;
typedef std::map<std::string, ContextList> ExtensionIdContextsMap;
struct ExtensionViewContexts {
ExtensionIdContextsMap contexts;
};
class ExtensionImpl : public v8::Extension {
public:
ExtensionImpl() : v8::Extension(
kExtensionName, GetStringResource<IDR_EXTENSION_PROCESS_BINDINGS_JS>(),
arraysize(kExtensionDeps), kExtensionDeps) {}
static void SetFunctionNames(const std::vector<std::string>& names) {
std::set<std::string>* name_set = GetFunctionNameSet();
for (size_t i = 0; i < names.size(); ++i) {
name_set->insert(names[i]);
}
}
virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
v8::Handle<v8::String> name) {
std::set<std::string>* names = GetFunctionNameSet();
if (name->Equals(v8::String::New("GetNextRequestId")))
return v8::FunctionTemplate::New(GetNextRequestId);
else if (name->Equals(v8::String::New("RegisterExtension")))
return v8::FunctionTemplate::New(RegisterExtension);
else if (name->Equals(v8::String::New("UnregisterExtension")))
return v8::FunctionTemplate::New(UnregisterExtension);
else if (name->Equals(v8::String::New("GetViews")))
return v8::FunctionTemplate::New(GetViews);
else if (names->find(*v8::String::AsciiValue(name)) != names->end())
return v8::FunctionTemplate::New(StartRequest, name);
return v8::Handle<v8::FunctionTemplate>();
}
private:
struct SingletonData {
std::set<std::string> function_names_;
};
static std::set<std::string>* GetFunctionNameSet() {
return &Singleton<SingletonData>()->function_names_;
}
static ContextList& GetRegisteredContexts(std::string extension_id) {
return Singleton<ExtensionViewContexts>::get()->contexts[extension_id];
}
static v8::Handle<v8::Value> RegisterExtension(const v8::Arguments& args) {
RenderView* renderview = GetRenderViewForCurrentContext();
DCHECK(renderview);
GURL url = renderview->webview()->GetMainFrame()->GetURL();
DCHECK(url.scheme() == chrome::kExtensionScheme);
v8::Persistent<v8::Context> current_context =
v8::Persistent<v8::Context>::New(v8::Context::GetCurrent());
DCHECK(!current_context.IsEmpty());
std::string extension_id = url.host();
GetRegisteredContexts(extension_id).push_back(current_context);
return v8::String::New(extension_id.c_str());
}
static v8::Handle<v8::Value> UnregisterExtension(const v8::Arguments& args) {
DCHECK_EQ(args.Length(), 1);
DCHECK(args[0]->IsString());
std::string extension_id(*v8::String::Utf8Value(args[0]));
ContextList& contexts = GetRegisteredContexts(extension_id);
v8::Local<v8::Context> current_context = v8::Context::GetCurrent();
DCHECK(!current_context.IsEmpty());
ContextList::iterator it = std::find(contexts.begin(), contexts.end(),
current_context);
if (it == contexts.end()) {
NOTREACHED();
return v8::Undefined();
}
it->Dispose();
it->Clear();
contexts.erase(it);
return v8::Undefined();
}
static v8::Handle<v8::Value> GetViews(const v8::Arguments& args) {
RenderView* renderview = GetRenderViewForCurrentContext();
DCHECK(renderview);
GURL url = renderview->webview()->GetMainFrame()->GetURL();
std::string extension_id = url.host();
ContextList& contexts = GetRegisteredContexts(extension_id);
DCHECK(contexts.size() > 0);
v8::Local<v8::Array> views = v8::Array::New(contexts.size());
int index = 0;
ContextList::const_iterator it = contexts.begin();
for (; it != contexts.end(); ++it) {
v8::Local<v8::Value> window = (*it)->Global()->Get(
v8::String::New("window"));
DCHECK(!window.IsEmpty());
views->Set(v8::Integer::New(index), window);
index++;
}
return views;
}
static v8::Handle<v8::Value> GetNextRequestId(const v8::Arguments& args) {
static int next_request_id = 0;
return v8::Integer::New(next_request_id++);
}
static v8::Handle<v8::Value> StartRequest(const v8::Arguments& args) {
// Get the current RenderView so that we can send a routed IPC message from
// the correct source.
WebFrame* webframe = WebFrame::RetrieveFrameForCurrentContext();
RenderView* renderview = GetRenderViewForCurrentContext();
if (!webframe || !renderview)
return v8::Undefined();
if (args.Length() != 3 || !args[0]->IsString() || !args[1]->IsInt32() ||
!args[2]->IsBoolean())
return v8::Undefined();
int request_id = args[1]->Int32Value();
bool has_callback = args[2]->BooleanValue();
renderview->SendExtensionRequest(
std::string(*v8::String::AsciiValue(args.Data())),
std::string(*v8::String::Utf8Value(args[0])),
request_id, has_callback, webframe);
return v8::Undefined();
}
};
} // namespace
v8::Extension* ExtensionProcessBindings::Get() {
return new ExtensionImpl();
}
void ExtensionProcessBindings::SetFunctionNames(
const std::vector<std::string>& names) {
ExtensionImpl::SetFunctionNames(names);
}
void ExtensionProcessBindings::RegisterExtensionContext(WebFrame* frame) {
frame->ExecuteScript(WebScriptSource(WebString::fromUTF8(
"chrome.self.register_();")));
}
void ExtensionProcessBindings::ExecuteResponseInFrame(
CallContext *call, int request_id, bool success,
const std::string& response,
const std::string& error) {
std::string code = "chrome.handleResponse_(";
code += IntToString(request_id);
code += ", '" + call->name_;
if (success)
code += "', true";
else
code += "', false";
code += ", '";
size_t offset = code.length();
code += response;
ReplaceSubstringsAfterOffset(&code, offset, "\\", "\\\\");
ReplaceSubstringsAfterOffset(&code, offset, "'", "\\'");
code += "', '";
offset = code.length();
code += error;
ReplaceSubstringsAfterOffset(&code, offset, "\\", "\\\\");
ReplaceSubstringsAfterOffset(&code, offset, "'", "\\'");
code += "')";
call->frame_->ExecuteScript(WebScriptSource(WebString::fromUTF8(code)));
}
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