chrome/renderer/spellchecker/spellcheck_provider.h

   1 // Copyright (c) 2012 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 CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_PROVIDER_H_
   6 #define CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_PROVIDER_H_
   7
   8 #include <vector>
   9
  10 #include "base/id_map.h"
  11 #include "content/public/renderer/render_view_observer.h"
  12 #include "content/public/renderer/render_view_observer_tracker.h"
  13 #include "third_party/WebKit/public/web/WebSpellCheckClient.h"
  14
  15 class RenderView;
  16 class SpellCheck;
  17 class SpellCheckMarker;
  18 struct SpellCheckResult;
  19
  20 namespace blink {
  21 class WebString;
  22 class WebTextCheckingCompletion;
  23 struct WebTextCheckingResult;
  24 }
  25
  26 // This class deals with invoking browser-side spellcheck mechanism
  27 // which is done asynchronously.
  28 class SpellCheckProvider
  29     : public content::RenderViewObserver,
  30       public content::RenderViewObserverTracker<SpellCheckProvider>,
  31       public blink::WebSpellCheckClient {
  32  public:
  33   typedef IDMap<blink::WebTextCheckingCompletion> WebTextCheckCompletions;
  34
  35   SpellCheckProvider(content::RenderView* render_view,
  36                      SpellCheck* spellcheck);
  37   ~SpellCheckProvider() override;
  38
  39   // Requests async spell and grammar checker to the platform text
  40   // checker, which is available on the browser process.
  41   void RequestTextChecking(
  42       const base::string16& text,
  43       blink::WebTextCheckingCompletion* completion,
  44       const std::vector<SpellCheckMarker>& markers);
  45
  46   // The number of ongoing IPC requests.
  47   size_t pending_text_request_size() const {
  48     return text_check_completions_.size();
  49   }
  50
  51   // Replace shared spellcheck data.
  52   void set_spellcheck(SpellCheck* spellcheck) { spellcheck_ = spellcheck; }
  53
  54   // Enables document-wide spellchecking.
  55   void EnableSpellcheck(bool enabled);
  56
  57   // RenderViewObserver implementation.
  58   bool OnMessageReceived(const IPC::Message& message) override;
  59   void FocusedNodeChanged(const blink::WebNode& node) override;
  60
  61  private:
  62   friend class TestingSpellCheckProvider;
  63
  64   // Tries to satisfy a spell check request from the cache in |last_request_|.
  65   // Returns true (and cancels/finishes the completion) if it can, false
  66   // if the provider should forward the query on.
  67   bool SatisfyRequestFromCache(const base::string16& text,
  68                                blink::WebTextCheckingCompletion* completion);
  69
  70   // blink::WebSpellCheckClient implementation.
  71   void spellCheck(
  72       const blink::WebString& text,
  73       int& offset,
  74       int& length,
  75       blink::WebVector<blink::WebString>* optional_suggestions) override;
  76   void checkTextOfParagraph(
  77       const blink::WebString& text,
  78       blink::WebTextCheckingTypeMask mask,
  79       blink::WebVector<blink::WebTextCheckingResult>* results) override;
  80
  81   void requestCheckingOfText(
  82       const blink::WebString& text,
  83       const blink::WebVector<uint32>& markers,
  84       const blink::WebVector<unsigned>& marker_offsets,
  85       blink::WebTextCheckingCompletion* completion) override;
  86
  87   blink::WebString autoCorrectWord(
  88       const blink::WebString& misspelled_word) override;
  89   void showSpellingUI(bool show) override;
  90   bool isShowingSpellingUI() override;
  91   void updateSpellingUIWithMisspelledWord(
  92       const blink::WebString& word) override;
  93
  94 #if !defined(USE_BROWSER_SPELLCHECKER)
  95   void OnRespondSpellingService(
  96       int identifier,
  97       bool succeeded,
  98       const base::string16& text,
  99       const std::vector<SpellCheckResult>& results);
 100 #endif
 101
 102   // Returns whether |text| has word characters, i.e. whether a spellchecker
 103   // needs to check this text.
 104   bool HasWordCharacters(const base::string16& text, int index) const;
 105
 106 #if defined(USE_BROWSER_SPELLCHECKER)
 107   void OnAdvanceToNextMisspelling();
 108   void OnRespondTextCheck(
 109       int identifier,
 110       const base::string16& line,
 111       const std::vector<SpellCheckResult>& results);
 112   void OnToggleSpellPanel(bool is_currently_visible);
 113 #endif
 114
 115   // Holds ongoing spellchecking operations, assigns IDs for the IPC routing.
 116   WebTextCheckCompletions text_check_completions_;
 117
 118   // The last text sent to the browser process to spellcheck it and its
 119   // spellchecking results.
 120   base::string16 last_request_;
 121   blink::WebVector<blink::WebTextCheckingResult> last_results_;
 122
 123   // True if the browser is showing the spelling panel for us.
 124   bool spelling_panel_visible_;
 125
 126   // Weak pointer to shared (per RenderView) spellcheck data.
 127   SpellCheck* spellcheck_;
 128
 129   DISALLOW_COPY_AND_ASSIGN(SpellCheckProvider);
 130 };
 131
 132 #endif  // CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_PROVIDER_H_