content/browser/accessibility/browser_accessibility_android.h

   1 // Copyright 2013 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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_ANDROID_H_
   6 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_ANDROID_H_
   7
   8 #include "base/android/scoped_java_ref.h"
   9 #include "content/browser/accessibility/browser_accessibility.h"
  10
  11 namespace content {
  12
  13 class CONTENT_EXPORT BrowserAccessibilityAndroid : public BrowserAccessibility {
  14  public:
  15   // Overrides from BrowserAccessibility.
  16   void OnDataChanged() override;
  17   bool IsNative() const override;
  18   void OnLocationChanged() override;
  19
  20   bool PlatformIsLeaf() const override;
  21
  22   bool IsCheckable() const;
  23   bool IsChecked() const;
  24   bool IsClickable() const;
  25   bool IsCollection() const;
  26   bool IsCollectionItem() const;
  27   bool IsContentInvalid() const;
  28   bool IsDismissable() const;
  29   bool IsEditableText() const;
  30   bool IsEnabled() const;
  31   bool IsFocusable() const;
  32   bool IsFocused() const;
  33   bool IsHeading() const;
  34   bool IsHierarchical() const;
  35   bool IsLink() const;
  36   bool IsMultiLine() const;
  37   bool IsPassword() const;
  38   bool IsRangeType() const;
  39   bool IsScrollable() const;
  40   bool IsSelected() const;
  41   bool IsSlider() const;
  42   bool IsVisibleToUser() const;
  43
  44   bool CanOpenPopup() const;
  45
  46   bool HasFocusableChild() const;
  47
  48   const char* GetClassName() const;
  49   base::string16 GetText() const;
  50
  51   int GetItemIndex() const;
  52   int GetItemCount() const;
  53
  54   bool CanScrollForward() const;
  55   bool CanScrollBackward() const;
  56   bool CanScrollUp() const;
  57   bool CanScrollDown() const;
  58   bool CanScrollLeft() const;
  59   bool CanScrollRight() const;
  60   int GetScrollX() const;
  61   int GetScrollY() const;
  62   int GetMinScrollX() const;
  63   int GetMinScrollY() const;
  64   int GetMaxScrollX() const;
  65   int GetMaxScrollY() const;
  66   bool Scroll(int direction) const;
  67
  68   int GetTextChangeFromIndex() const;
  69   int GetTextChangeAddedCount() const;
  70   int GetTextChangeRemovedCount() const;
  71   base::string16 GetTextChangeBeforeText() const;
  72
  73   int GetSelectionStart() const;
  74   int GetSelectionEnd() const;
  75   int GetEditableTextLength() const;
  76
  77   int AndroidInputType() const;
  78   int AndroidLiveRegionType() const;
  79   int AndroidRangeType() const;
  80
  81   int RowCount() const;
  82   int ColumnCount() const;
  83
  84   int RowIndex() const;
  85   int RowSpan() const;
  86   int ColumnIndex() const;
  87   int ColumnSpan() const;
  88
  89   float RangeMin() const;
  90   float RangeMax() const;
  91   float RangeCurrentValue() const;
  92
  93   // Calls GetLineBoundaries or GetWordBoundaries depending on the value
  94   // of |granularity|, or fails if anything else is passed in |granularity|.
  95   void GetGranularityBoundaries(int granularity,
  96                                 std::vector<int32>* starts,
  97                                 std::vector<int32>* ends,
  98                                 int offset);
  99
 100   // Append line start and end indices for the text of this node
 101   // (as returned by GetText()), adding |offset| to each one.
 102   void GetLineBoundaries(std::vector<int32>* line_starts,
 103                          std::vector<int32>* line_ends,
 104                          int offset);
 105
 106   // Append word start and end indices for the text of this node
 107   // (as returned by GetText()) to |word_starts| and |word_ends|,
 108   // adding |offset| to each one.
 109   void GetWordBoundaries(std::vector<int32>* word_starts,
 110                          std::vector<int32>* word_ends,
 111                          int offset);
 112
 113  private:
 114   // This gives BrowserAccessibility::Create access to the class constructor.
 115   friend class BrowserAccessibility;
 116
 117   BrowserAccessibilityAndroid();
 118
 119   bool HasOnlyStaticTextChildren() const;
 120   bool HasOnlyTextAndImageChildren() const;
 121   bool IsIframe() const;
 122
 123   void NotifyLiveRegionUpdate(base::string16& aria_live);
 124
 125   int CountChildrenWithRole(ui::AXRole role) const;
 126
 127   static size_t CommonPrefixLength(const base::string16 a,
 128                                    const base::string16 b);
 129   static size_t CommonSuffixLength(const base::string16 a,
 130                                    const base::string16 b);
 131   static size_t CommonEndLengths(const base::string16 a,
 132                                  const base::string16 b);
 133
 134   base::string16 cached_text_;
 135   bool first_time_;
 136   base::string16 old_value_;
 137   base::string16 new_value_;
 138
 139   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityAndroid);
 140 };
 141
 142 }  // namespace content
 143
 144 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_ANDROID_H_