extensions/renderer/user_script_injector.h

   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 #ifndef EXTENSIONS_RENDERER_USER_SCRIPT_INJECTOR_H_
   6 #define EXTENSIONS_RENDERER_USER_SCRIPT_INJECTOR_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/scoped_observer.h"
  12 #include "extensions/common/user_script.h"
  13 #include "extensions/renderer/script_injection.h"
  14 #include "extensions/renderer/user_script_set.h"
  15
  16 class InjectionHost;
  17
  18 namespace blink {
  19 class WebLocalFrame;
  20 }
  21
  22 namespace extensions {
  23
  24 // A ScriptInjector for UserScripts.
  25 class UserScriptInjector : public ScriptInjector,
  26                            public UserScriptSet::Observer {
  27  public:
  28   UserScriptInjector(const UserScript* user_script,
  29                      UserScriptSet* user_script_set,
  30                      bool is_declarative);
  31   ~UserScriptInjector() override;
  32
  33  private:
  34   // UserScriptSet::Observer implementation.
  35   void OnUserScriptsUpdated(const std::set<HostID>& changed_hosts,
  36                             const std::vector<UserScript*>& scripts) override;
  37
  38   // ScriptInjector implementation.
  39   UserScript::InjectionType script_type() const override;
  40   bool ShouldExecuteInMainWorld() const override;
  41   bool IsUserGesture() const override;
  42   bool ExpectsResults() const override;
  43   bool ShouldInjectJs(UserScript::RunLocation run_location) const override;
  44   bool ShouldInjectCss(UserScript::RunLocation run_location) const override;
  45   PermissionsData::AccessType CanExecuteOnFrame(
  46       const InjectionHost* injection_host,
  47       blink::WebLocalFrame* web_frame,
  48       int tab_id) const override;
  49   std::vector<blink::WebScriptSource> GetJsSources(
  50       UserScript::RunLocation run_location) const override;
  51   std::vector<std::string> GetCssSources(
  52       UserScript::RunLocation run_location) const override;
  53   void GetRunInfo(ScriptsRunInfo* scripts_run_info,
  54                   UserScript::RunLocation run_location) const override;
  55   void OnInjectionComplete(scoped_ptr<base::Value> execution_result,
  56                            UserScript::RunLocation run_location) override;
  57   void OnWillNotInject(InjectFailureReason reason) override;
  58
  59   // The associated user script. Owned by the UserScriptInjector that created
  60   // this object.
  61   const UserScript* script_;
  62
  63   // The id of the associated user script. We cache this because when we update
  64   // the |script_| associated with this injection, the old referance may be
  65   // deleted.
  66   int script_id_;
  67
  68   // The associated host id, preserved for the same reason as |script_id|.
  69   HostID host_id_;
  70
  71   // Indicates whether or not this script is declarative. This influences which
  72   // script permissions are checked before injection.
  73   bool is_declarative_;
  74
  75   ScopedObserver<UserScriptSet, UserScriptSet::Observer>
  76       user_script_set_observer_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(UserScriptInjector);
  79 };
  80
  81 }  // namespace extensions
  82
  83 #endif  // EXTENSIONS_RENDERER_USER_SCRIPT_INJECTOR_H_