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// Copyright 2014 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 "extensions/renderer/user_script_set_manager.h"
#include "components/crx_file/id_util.h"
#include "content/public/renderer/render_thread.h"
#include "extensions/common/extension_messages.h"
#include "extensions/renderer/dispatcher.h"
#include "extensions/renderer/script_injection.h"
#include "extensions/renderer/user_script_set.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_message_macros.h"
#include "third_party/WebKit/public/web/WebFrame.h"
namespace extensions {
UserScriptSetManager::UserScriptSetManager(const ExtensionSet* extensions)
: static_scripts_(extensions), extensions_(extensions) {
content::RenderThread::Get()->AddObserver(this);
}
UserScriptSetManager::~UserScriptSetManager() {
}
void UserScriptSetManager::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void UserScriptSetManager::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
scoped_ptr<ScriptInjection>
UserScriptSetManager::GetInjectionForDeclarativeScript(
int script_id,
blink::WebFrame* web_frame,
int tab_id,
const GURL& url,
const Extension* extension) {
UserScriptSet* user_script_set =
GetProgrammaticScriptsByExtension(extension->id());
if (!user_script_set)
return scoped_ptr<ScriptInjection>();
return user_script_set->GetDeclarativeScriptInjection(
script_id,
web_frame,
tab_id,
UserScript::BROWSER_DRIVEN,
url,
extension);
}
bool UserScriptSetManager::OnControlMessageReceived(
const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(UserScriptSetManager, message)
IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateUserScripts, OnUpdateUserScripts)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void UserScriptSetManager::GetAllInjections(
ScopedVector<ScriptInjection>* injections,
blink::WebFrame* web_frame,
int tab_id,
UserScript::RunLocation run_location) {
static_scripts_.GetInjections(injections, web_frame, tab_id, run_location);
for (UserScriptSetMap::iterator it = programmatic_scripts_.begin();
it != programmatic_scripts_.end();
++it) {
it->second->GetInjections(injections, web_frame, tab_id, run_location);
}
}
void UserScriptSetManager::GetAllActiveExtensionIds(
std::set<std::string>* ids) const {
DCHECK(ids);
static_scripts_.GetActiveExtensionIds(ids);
for (UserScriptSetMap::const_iterator it = programmatic_scripts_.begin();
it != programmatic_scripts_.end();
++it) {
it->second->GetActiveExtensionIds(ids);
}
}
UserScriptSet* UserScriptSetManager::GetProgrammaticScriptsByExtension(
const ExtensionId& extension_id) {
UserScriptSetMap::const_iterator it =
programmatic_scripts_.find(extension_id);
return it != programmatic_scripts_.end() ? it->second.get() : NULL;
}
void UserScriptSetManager::OnUpdateUserScripts(
base::SharedMemoryHandle shared_memory,
const ExtensionId& extension_id,
const std::set<std::string>& changed_extensions) {
if (!base::SharedMemory::IsHandleValid(shared_memory)) {
NOTREACHED() << "Bad scripts handle";
return;
}
for (std::set<std::string>::const_iterator iter = changed_extensions.begin();
iter != changed_extensions.end();
++iter) {
if (!crx_file::id_util::IdIsValid(*iter)) {
NOTREACHED() << "Invalid extension id: " << *iter;
return;
}
}
UserScriptSet* scripts = NULL;
if (!extension_id.empty()) {
// The expectation when there is an extension that "owns" this shared
// memory region is that the |changed_extensions| is either the empty list
// or just the owner.
CHECK(changed_extensions.size() <= 1);
if (programmatic_scripts_.find(extension_id) ==
programmatic_scripts_.end()) {
scripts = new UserScriptSet(extensions_);
programmatic_scripts_[extension_id] = make_linked_ptr(scripts);
} else {
scripts = programmatic_scripts_[extension_id].get();
}
} else {
scripts = &static_scripts_;
}
DCHECK(scripts);
// If no extensions are included in the set, that indicates that all
// extensions were updated. Add them all to the set so that observers and
// individual UserScriptSets don't need to know this detail.
const std::set<std::string>* effective_extensions = &changed_extensions;
std::set<std::string> all_extensions;
if (changed_extensions.empty()) {
// The meaning of "all extensions" varies, depending on whether some
// extension "owns" this shared memory region.
// No owner => all known extensions.
// Owner => just the owner extension.
if (extension_id.empty())
all_extensions = extensions_->GetIDs();
else
all_extensions.insert(extension_id);
effective_extensions = &all_extensions;
}
if (scripts->UpdateUserScripts(shared_memory, *effective_extensions)) {
FOR_EACH_OBSERVER(
Observer,
observers_,
OnUserScriptsUpdated(*effective_extensions, scripts->scripts()));
}
}
} // namespace extensions
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