summaryrefslogtreecommitdiff
path: root/dom/base/TextInputProcessor.h
blob: 07cfd3898a62c89042bbbe4cfe422ef31815d299 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_textinputprocessor_h_
#define mozilla_dom_textinputprocessor_h_

#include "mozilla/Attributes.h"
#include "mozilla/EventForwards.h"
#include "mozilla/TextEventDispatcher.h"
#include "mozilla/TextEventDispatcherListener.h"
#include "nsITextInputProcessor.h"
#include "nsITextInputProcessorCallback.h"
#include "nsTArray.h"

namespace mozilla {

class TextInputProcessor final : public nsITextInputProcessor
                               , public widget::TextEventDispatcherListener
{
  typedef mozilla::widget::IMENotification IMENotification;
  typedef mozilla::widget::TextEventDispatcher TextEventDispatcher;

public:
  TextInputProcessor();

  NS_DECL_ISUPPORTS
  NS_DECL_NSITEXTINPUTPROCESSOR

  // TextEventDispatcherListener
  NS_IMETHOD NotifyIME(TextEventDispatcher* aTextEventDispatcher,
                       const IMENotification& aNotification) override;
  NS_IMETHOD_(void)
    OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher) override;

  NS_IMETHOD_(void) WillDispatchKeyboardEvent(
                      TextEventDispatcher* aTextEventDispatcher,
                      WidgetKeyboardEvent& aKeyboardEvent,
                      uint32_t aIndexOfKeypress,
                      void* aData) override;

protected:
  virtual ~TextInputProcessor();

private:
  bool IsComposing() const;
  nsresult BeginInputTransactionInternal(
             mozIDOMWindow* aWindow,
             nsITextInputProcessorCallback* aCallback,
             bool aForTests,
             bool& aSucceeded);
  nsresult CommitCompositionInternal(
             const WidgetKeyboardEvent* aKeyboardEvent = nullptr,
             uint32_t aKeyFlags = 0,
             const nsAString* aCommitString = nullptr,
             bool* aSucceeded = nullptr);
  nsresult CancelCompositionInternal(
             const WidgetKeyboardEvent* aKeyboardEvent = nullptr,
             uint32_t aKeyFlags = 0);
  nsresult KeydownInternal(const WidgetKeyboardEvent& aKeyboardEvent,
                           uint32_t aKeyFlags,
                           bool aAllowToDispatchKeypress,
                           uint32_t& aConsumedFlags);
  nsresult KeyupInternal(const WidgetKeyboardEvent& aKeyboardEvent,
                         uint32_t aKeyFlags,
                         bool& aDoDefault);
  nsresult IsValidStateForComposition();
  void UnlinkFromTextEventDispatcher();
  nsresult PrepareKeyboardEventToDispatch(WidgetKeyboardEvent& aKeyboardEvent,
                                          uint32_t aKeyFlags);
  bool IsValidEventTypeForComposition(
         const WidgetKeyboardEvent& aKeyboardEvent) const;
  nsresult PrepareKeyboardEventForComposition(
             nsIDOMKeyEvent* aDOMKeyEvent,
             uint32_t& aKeyFlags,
             uint8_t aOptionalArgc,
             WidgetKeyboardEvent*& aKeyboardEvent);

  struct EventDispatcherResult
  {
    nsresult mResult;
    bool     mDoDefault;
    bool     mCanContinue;

    EventDispatcherResult()
      : mResult(NS_OK)
      , mDoDefault(true)
      , mCanContinue(true)
    {
    }
  };
  EventDispatcherResult MaybeDispatchKeydownForComposition(
                          const WidgetKeyboardEvent* aKeyboardEvent,
                          uint32_t aKeyFlags);
  EventDispatcherResult MaybeDispatchKeyupForComposition(
                          const WidgetKeyboardEvent* aKeyboardEvent,
                          uint32_t aKeyFlags);

  /**
   * AutoPendingCompositionResetter guarantees to clear all pending composition
   * data in its destructor.
   */
  class MOZ_STACK_CLASS AutoPendingCompositionResetter
  {
  public:
    explicit AutoPendingCompositionResetter(TextInputProcessor* aTIP);
    ~AutoPendingCompositionResetter();

  private:
    RefPtr<TextInputProcessor> mTIP;
  };

  /**
   * TextInputProcessor manages modifier state both with .key and .code.
   * For example, left shift key up shouldn't cause inactivating shift state
   * while right shift key is being pressed.
   */
  struct ModifierKeyData
  {
    // One of modifier key name
    KeyNameIndex mKeyNameIndex;
    // Any code name is allowed.
    CodeNameIndex mCodeNameIndex;
    // A modifier key flag which is activated by the key.
    Modifiers mModifier;

    explicit ModifierKeyData(const WidgetKeyboardEvent& aKeyboardEvent);

    bool operator==(const ModifierKeyData& aOther) const
    {
      return mKeyNameIndex == aOther.mKeyNameIndex &&
             mCodeNameIndex == aOther.mCodeNameIndex;
    }
  };

  class ModifierKeyDataArray : public nsTArray<ModifierKeyData>
  {
    NS_INLINE_DECL_REFCOUNTING(ModifierKeyDataArray)

  public:
    Modifiers GetActiveModifiers() const;
    void ActivateModifierKey(const ModifierKeyData& aModifierKeyData);
    void InactivateModifierKey(const ModifierKeyData& aModifierKeyData);
    void ToggleModifierKey(const ModifierKeyData& aModifierKeyData);

  private:
    virtual ~ModifierKeyDataArray() { }
  };

  Modifiers GetActiveModifiers() const
  {
    return mModifierKeyDataArray ?
      mModifierKeyDataArray->GetActiveModifiers() : 0;
  }
  void EnsureModifierKeyDataArray()
  {
    if (mModifierKeyDataArray) {
      return;
    }
    mModifierKeyDataArray = new ModifierKeyDataArray();
  }
  void ActivateModifierKey(const ModifierKeyData& aModifierKeyData)
  {
    EnsureModifierKeyDataArray();
    mModifierKeyDataArray->ActivateModifierKey(aModifierKeyData);
  }
  void InactivateModifierKey(const ModifierKeyData& aModifierKeyData)
  {
    if (!mModifierKeyDataArray) {
      return;
    }
    mModifierKeyDataArray->InactivateModifierKey(aModifierKeyData);
  }
  void ToggleModifierKey(const ModifierKeyData& aModifierKeyData)
  {
    EnsureModifierKeyDataArray();
    mModifierKeyDataArray->ToggleModifierKey(aModifierKeyData);
  }

  TextEventDispatcher* mDispatcher; // [Weak]
  nsCOMPtr<nsITextInputProcessorCallback> mCallback;
  RefPtr<ModifierKeyDataArray> mModifierKeyDataArray;

  bool mForTests;
};

} // namespace mozilla

#endif // #ifndef mozilla_dom_textinputprocessor_h_