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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"
namespace extensions {
UserScriptSetManager::UserScriptSetManager() {
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,
content::RenderFrame* render_frame,
int tab_id,
const GURL& url,
const std::string& extension_id) {
UserScriptSet* user_script_set =
GetProgrammaticScriptsByHostID(HostID(HostID::EXTENSIONS, extension_id));
if (!user_script_set)
return scoped_ptr<ScriptInjection>();
return user_script_set->GetDeclarativeScriptInjection(
script_id,
render_frame,
tab_id,
UserScript::BROWSER_DRIVEN,
url);
}
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(
std::vector<scoped_ptr<ScriptInjection>>* injections,
content::RenderFrame* render_frame,
int tab_id,
UserScript::RunLocation run_location) {
static_scripts_.GetInjections(injections, render_frame, tab_id, run_location);
for (UserScriptSetMap::iterator it = programmatic_scripts_.begin();
it != programmatic_scripts_.end();
++it) {
it->second->GetInjections(injections, render_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::GetProgrammaticScriptsByHostID(
const HostID& host_id) {
UserScriptSetMap::const_iterator it = programmatic_scripts_.find(host_id);
return it != programmatic_scripts_.end() ? it->second.get() : NULL;
}
void UserScriptSetManager::OnUpdateUserScripts(
base::SharedMemoryHandle shared_memory,
const HostID& host_id,
const std::set<HostID>& changed_hosts,
bool whitelisted_only) {
if (!base::SharedMemory::IsHandleValid(shared_memory)) {
NOTREACHED() << "Bad scripts handle";
return;
}
for (const HostID& host_id : changed_hosts) {
if (host_id.type() == HostID::EXTENSIONS &&
!crx_file::id_util::IdIsValid(host_id.id())) {
NOTREACHED() << "Invalid extension id: " << host_id.id();
return;
}
}
UserScriptSet* scripts = NULL;
if (!host_id.id().empty()) {
// The expectation when there is a host that "owns" this shared
// memory region is that the |changed_hosts| is either the empty list
// or just the owner.
CHECK(changed_hosts.size() <= 1);
if (programmatic_scripts_.find(host_id) == programmatic_scripts_.end()) {
scripts = new UserScriptSet();
programmatic_scripts_[host_id] = make_linked_ptr(scripts);
} else {
scripts = programmatic_scripts_[host_id].get();
}
} else {
scripts = &static_scripts_;
}
DCHECK(scripts);
// If no hosts are included in the set, that indicates that all
// hosts were updated. Add them all to the set so that observers and
// individual UserScriptSets don't need to know this detail.
const std::set<HostID>* effective_hosts = &changed_hosts;
std::set<HostID> all_hosts;
if (changed_hosts.empty()) {
// The meaning of "all hosts(extensions)" varies, depending on whether some
// host "owns" this shared memory region.
// No owner => all known hosts.
// Owner => just the owner host.
if (host_id.id().empty()) {
std::set<std::string> extension_ids =
RendererExtensionRegistry::Get()->GetIDs();
for (const std::string& extension_id : extension_ids)
all_hosts.insert(HostID(HostID::EXTENSIONS, extension_id));
} else {
all_hosts.insert(host_id);
}
effective_hosts = &all_hosts;
}
if (scripts->UpdateUserScripts(shared_memory,
*effective_hosts,
whitelisted_only)) {
FOR_EACH_OBSERVER(
Observer,
observers_,
OnUserScriptsUpdated(*effective_hosts, scripts->scripts()));
}
}
} // namespace extensions
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