chrome/browser/autocomplete/keyword_extensions_delegate_impl.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 // KeywordExtensionsDelegateImpl contains the extensions-only logic used by
   6 // KeywordProvider. Overrides KeywordExtensionsDelegate which does nothing.
   7
   8 #ifndef CHROME_BROWSER_AUTOCOMPLETE_KEYWORD_EXTENSIONS_DELEGATE_IMPL_H_
   9 #define CHROME_BROWSER_AUTOCOMPLETE_KEYWORD_EXTENSIONS_DELEGATE_IMPL_H_
  10
  11 #include <vector>
  12
  13 #include "base/compiler_specific.h"
  14 #include "components/omnibox/autocomplete_input.h"
  15 #include "components/omnibox/autocomplete_match.h"
  16 #include "components/omnibox/autocomplete_provider_listener.h"
  17 #include "components/omnibox/keyword_extensions_delegate.h"
  18 #include "components/omnibox/keyword_provider.h"
  19 #include "content/public/browser/notification_observer.h"
  20 #include "content/public/browser/notification_registrar.h"
  21
  22 #if !defined(ENABLE_EXTENSIONS)
  23 #error "Should not be included when extensions are disabled"
  24 #endif
  25
  26 class Profile;
  27
  28 class KeywordExtensionsDelegateImpl : public KeywordExtensionsDelegate,
  29                                       public content::NotificationObserver {
  30  public:
  31   KeywordExtensionsDelegateImpl(Profile* profile, KeywordProvider* provider);
  32   virtual ~KeywordExtensionsDelegateImpl();
  33
  34  private:
  35   // KeywordExtensionsDelegate:
  36   virtual void IncrementInputId() OVERRIDE;
  37   virtual bool IsEnabledExtension(const std::string& extension_id) OVERRIDE;
  38   virtual bool Start(const AutocompleteInput& input,
  39                      bool minimal_changes,
  40                      const TemplateURL* template_url,
  41                      const base::string16& remaining_input) OVERRIDE;
  42   virtual void EnterExtensionKeywordMode(
  43       const std::string& extension_id) OVERRIDE;
  44   virtual void MaybeEndExtensionKeywordMode() OVERRIDE;
  45
  46   // content::NotificationObserver:
  47   virtual void Observe(int type,
  48                        const content::NotificationSource& source,
  49                        const content::NotificationDetails& details) OVERRIDE;
  50
  51   ACMatches* matches() { return &provider_->matches_; }
  52   void set_done(bool done) {
  53     provider_->done_ = done;
  54   }
  55
  56   // Notifies the KeywordProvider about asynchronous updates from the extension.
  57   void OnProviderUpdate(bool updated_matches);
  58
  59   // Identifies the current input state. This is incremented each time the
  60   // autocomplete edit's input changes in any way. It is used to tell whether
  61   // suggest results from the extension are current.
  62   int current_input_id_;
  63
  64   // The input state at the time we last asked the extension for suggest
  65   // results.
  66   AutocompleteInput extension_suggest_last_input_;
  67
  68   // We remember the last suggestions we've received from the extension in case
  69   // we need to reset our matches without asking the extension again.
  70   std::vector<AutocompleteMatch> extension_suggest_matches_;
  71
  72   // If non-empty, holds the ID of the extension whose keyword is currently in
  73   // the URL bar while the autocomplete popup is open.
  74   std::string current_keyword_extension_id_;
  75
  76   Profile* profile_;
  77
  78   // The owner of this class.
  79   KeywordProvider* provider_;
  80
  81   content::NotificationRegistrar registrar_;
  82
  83   // We need our input IDs to be unique across all profiles, so we keep a global
  84   // UID that each provider uses.
  85   static int global_input_uid_;
  86
  87   DISALLOW_COPY_AND_ASSIGN(KeywordExtensionsDelegateImpl);
  88 };
  89
  90 #endif  // CHROME_BROWSER_AUTOCOMPLETE_KEYWORD_EXTENSIONS_DELEGATE_IMPL_H_