extensions/renderer/user_script_set_manager.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/renderer/user_script_set_manager.h"
   6
   7 #include "components/crx_file/id_util.h"
   8 #include "content/public/renderer/render_thread.h"
   9 #include "extensions/common/extension_messages.h"
  10 #include "extensions/renderer/dispatcher.h"
  11 #include "extensions/renderer/script_injection.h"
  12 #include "extensions/renderer/user_script_set.h"
  13 #include "ipc/ipc_message.h"
  14 #include "ipc/ipc_message_macros.h"
  15 #include "third_party/WebKit/public/web/WebFrame.h"
  16
  17 namespace extensions {
  18
  19 UserScriptSetManager::UserScriptSetManager(const ExtensionSet* extensions)
  20     : static_scripts_(extensions), extensions_(extensions) {
  21   content::RenderThread::Get()->AddObserver(this);
  22 }
  23
  24 UserScriptSetManager::~UserScriptSetManager() {
  25 }
  26
  27 void UserScriptSetManager::AddObserver(Observer* observer) {
  28   observers_.AddObserver(observer);
  29 }
  30
  31 void UserScriptSetManager::RemoveObserver(Observer* observer) {
  32   observers_.RemoveObserver(observer);
  33 }
  34
  35 scoped_ptr<ScriptInjection>
  36 UserScriptSetManager::GetInjectionForDeclarativeScript(
  37     int script_id,
  38     blink::WebFrame* web_frame,
  39     int tab_id,
  40     const GURL& url,
  41     const std::string& extension_id) {
  42   UserScriptSet* user_script_set =
  43       GetProgrammaticScriptsByExtension(extension_id);
  44   if (!user_script_set)
  45     return scoped_ptr<ScriptInjection>();
  46
  47   return user_script_set->GetDeclarativeScriptInjection(
  48       script_id,
  49       web_frame,
  50       tab_id,
  51       UserScript::BROWSER_DRIVEN,
  52       url);
  53 }
  54
  55 bool UserScriptSetManager::OnControlMessageReceived(
  56     const IPC::Message& message) {
  57   bool handled = true;
  58   IPC_BEGIN_MESSAGE_MAP(UserScriptSetManager, message)
  59     IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateUserScripts, OnUpdateUserScripts)
  60     IPC_MESSAGE_UNHANDLED(handled = false)
  61   IPC_END_MESSAGE_MAP()
  62   return handled;
  63 }
  64
  65 void UserScriptSetManager::GetAllInjections(
  66     ScopedVector<ScriptInjection>* injections,
  67     blink::WebFrame* web_frame,
  68     int tab_id,
  69     UserScript::RunLocation run_location) {
  70   static_scripts_.GetInjections(injections, web_frame, tab_id, run_location);
  71   for (UserScriptSetMap::iterator it = programmatic_scripts_.begin();
  72        it != programmatic_scripts_.end();
  73        ++it) {
  74     it->second->GetInjections(injections, web_frame, tab_id, run_location);
  75   }
  76 }
  77
  78 void UserScriptSetManager::GetAllActiveExtensionIds(
  79     std::set<std::string>* ids) const {
  80   DCHECK(ids);
  81   static_scripts_.GetActiveExtensionIds(ids);
  82   for (UserScriptSetMap::const_iterator it = programmatic_scripts_.begin();
  83        it != programmatic_scripts_.end();
  84        ++it) {
  85     it->second->GetActiveExtensionIds(ids);
  86   }
  87 }
  88
  89 UserScriptSet* UserScriptSetManager::GetProgrammaticScriptsByExtension(
  90     const ExtensionId& extension_id) {
  91   UserScriptSetMap::const_iterator it =
  92       programmatic_scripts_.find(extension_id);
  93   return it != programmatic_scripts_.end() ? it->second.get() : NULL;
  94 }
  95
  96 void UserScriptSetManager::OnUpdateUserScripts(
  97     base::SharedMemoryHandle shared_memory,
  98     const ExtensionId& extension_id,
  99     const std::set<std::string>& changed_extensions) {
 100   if (!base::SharedMemory::IsHandleValid(shared_memory)) {
 101     NOTREACHED() << "Bad scripts handle";
 102     return;
 103   }
 104
 105   for (std::set<std::string>::const_iterator iter = changed_extensions.begin();
 106        iter != changed_extensions.end();
 107        ++iter) {
 108     if (!crx_file::id_util::IdIsValid(*iter)) {
 109       NOTREACHED() << "Invalid extension id: " << *iter;
 110       return;
 111     }
 112   }
 113
 114   UserScriptSet* scripts = NULL;
 115   if (!extension_id.empty()) {
 116     // The expectation when there is an extension that "owns" this shared
 117     // memory region is that the |changed_extensions| is either the empty list
 118     // or just the owner.
 119     CHECK(changed_extensions.size() <= 1);
 120     if (programmatic_scripts_.find(extension_id) ==
 121         programmatic_scripts_.end()) {
 122       scripts = new UserScriptSet(extensions_);
 123       programmatic_scripts_[extension_id] = make_linked_ptr(scripts);
 124     } else {
 125       scripts = programmatic_scripts_[extension_id].get();
 126     }
 127   } else {
 128     scripts = &static_scripts_;
 129   }
 130   DCHECK(scripts);
 131
 132   // If no extensions are included in the set, that indicates that all
 133   // extensions were updated. Add them all to the set so that observers and
 134   // individual UserScriptSets don't need to know this detail.
 135   const std::set<std::string>* effective_extensions = &changed_extensions;
 136   std::set<std::string> all_extensions;
 137   if (changed_extensions.empty()) {
 138     // The meaning of "all extensions" varies, depending on whether some
 139     // extension "owns" this shared memory region.
 140     // No owner => all known extensions.
 141     // Owner    => just the owner extension.
 142     if (extension_id.empty())
 143       all_extensions = extensions_->GetIDs();
 144     else
 145       all_extensions.insert(extension_id);
 146     effective_extensions = &all_extensions;
 147   }
 148
 149   if (scripts->UpdateUserScripts(shared_memory, *effective_extensions)) {
 150     FOR_EACH_OBSERVER(
 151         Observer,
 152         observers_,
 153         OnUserScriptsUpdated(*effective_extensions, scripts->scripts()));
 154   }
 155 }
 156
 157 }  // namespace extensions