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comparison: accessible/src/generic/HyperTextAccessible-inl.h
accessible/src/generic/HyperTextAccessible-inl.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef mozilla_a11y_HyperTextAccessible_inl_h__ | |
| 7 #define mozilla_a11y_HyperTextAccessible_inl_h__ | |
| 8 | |
| 9 #include "HyperTextAccessible.h" | |
| 10 | |
| 11 #include "nsAccUtils.h" | |
| 12 | |
| 13 #include "nsIClipboard.h" | |
| 14 #include "nsIEditor.h" | |
| 15 #include "nsIPersistentProperties2.h" | |
| 16 #include "nsIPlaintextEditor.h" | |
| 17 | |
| 18 namespace mozilla { | |
| 19 namespace a11y { | |
| 20 | |
| 21 inline bool | |
| 22 HyperTextAccessible::IsValidOffset(int32_t aOffset) | |
| 23 { | |
| 24 int32_t offset = ConvertMagicOffset(aOffset); | |
| 25 return offset >= 0 && offset <= static_cast<int32_t>(CharacterCount()); | |
| 26 } | |
| 27 | |
| 28 inline bool | |
| 29 HyperTextAccessible::IsValidRange(int32_t aStartOffset, int32_t aEndOffset) | |
| 30 { | |
| 31 int32_t startOffset = ConvertMagicOffset(aStartOffset); | |
| 32 if (startOffset < 0) | |
| 33 return false; | |
| 34 | |
| 35 int32_t endOffset = ConvertMagicOffset(aEndOffset); | |
| 36 if (endOffset < 0 || startOffset > endOffset) | |
| 37 return false; | |
| 38 | |
| 39 return endOffset <= static_cast<int32_t>(CharacterCount()); | |
| 40 } | |
| 41 | |
| 42 inline bool | |
| 43 HyperTextAccessible::AddToSelection(int32_t aStartOffset, int32_t aEndOffset) | |
| 44 { | |
| 45 dom::Selection* domSel = DOMSelection(); | |
| 46 return domSel && | |
| 47 SetSelectionBoundsAt(domSel->GetRangeCount(), aStartOffset, aEndOffset); | |
| 48 } | |
| 49 | |
| 50 inline void | |
| 51 HyperTextAccessible::ReplaceText(const nsAString& aText) | |
| 52 { | |
| 53 int32_t numChars = CharacterCount(); | |
| 54 if (numChars != 0) | |
| 55 DeleteText(0, numChars); | |
| 56 | |
| 57 InsertText(aText, 0); | |
| 58 } | |
| 59 | |
| 60 inline void | |
| 61 HyperTextAccessible::InsertText(const nsAString& aText, int32_t aPosition) | |
| 62 { | |
| 63 nsCOMPtr<nsIEditor> editor = GetEditor(); | |
| 64 nsCOMPtr<nsIPlaintextEditor> peditor(do_QueryInterface(editor)); | |
| 65 if (peditor) { | |
| 66 SetSelectionRange(aPosition, aPosition); | |
| 67 peditor->InsertText(aText); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 inline void | |
| 72 HyperTextAccessible::CopyText(int32_t aStartPos, int32_t aEndPos) | |
| 73 { | |
| 74 nsCOMPtr<nsIEditor> editor = GetEditor(); | |
| 75 if (editor) { | |
| 76 SetSelectionRange(aStartPos, aEndPos); | |
| 77 editor->Copy(); | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 inline void | |
| 82 HyperTextAccessible::CutText(int32_t aStartPos, int32_t aEndPos) | |
| 83 { | |
| 84 nsCOMPtr<nsIEditor> editor = GetEditor(); | |
| 85 if (editor) { | |
| 86 SetSelectionRange(aStartPos, aEndPos); | |
| 87 editor->Cut(); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 inline void | |
| 92 HyperTextAccessible::DeleteText(int32_t aStartPos, int32_t aEndPos) | |
| 93 { | |
| 94 nsCOMPtr<nsIEditor> editor = GetEditor(); | |
| 95 if (editor) { | |
| 96 SetSelectionRange(aStartPos, aEndPos); | |
| 97 editor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 inline void | |
| 102 HyperTextAccessible::PasteText(int32_t aPosition) | |
| 103 { | |
| 104 nsCOMPtr<nsIEditor> editor = GetEditor(); | |
| 105 if (editor) { | |
| 106 SetSelectionRange(aPosition, aPosition); | |
| 107 editor->Paste(nsIClipboard::kGlobalClipboard); | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 inline int32_t | |
| 112 HyperTextAccessible::ConvertMagicOffset(int32_t aOffset) | |
| 113 { | |
| 114 if (aOffset == nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT) | |
| 115 return CharacterCount(); | |
| 116 | |
| 117 if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET) | |
| 118 return CaretOffset(); | |
| 119 | |
| 120 return aOffset; | |
| 121 } | |
| 122 | |
| 123 inline int32_t | |
| 124 HyperTextAccessible::AdjustCaretOffset(int32_t aOffset) const | |
| 125 { | |
| 126 // It is the same character offset when the caret is visually at the very | |
| 127 // end of a line or the start of a new line (soft line break). Getting text | |
| 128 // at the line should provide the line with the visual caret, otherwise | |
| 129 // screen readers will announce the wrong line as the user presses up or | |
| 130 // down arrow and land at the end of a line. | |
| 131 if (aOffset > 0 && IsCaretAtEndOfLine()) | |
| 132 return aOffset - 1; | |
| 133 | |
| 134 return aOffset; | |
| 135 } | |
| 136 | |
| 137 inline bool | |
| 138 HyperTextAccessible::IsCaretAtEndOfLine() const | |
| 139 { | |
| 140 nsRefPtr<nsFrameSelection> frameSelection = FrameSelection(); | |
| 141 return frameSelection && | |
| 142 frameSelection->GetHint() == nsFrameSelection::HINTLEFT; | |
| 143 } | |
| 144 | |
| 145 inline already_AddRefed<nsFrameSelection> | |
| 146 HyperTextAccessible::FrameSelection() const | |
| 147 { | |
| 148 nsIFrame* frame = GetFrame(); | |
| 149 return frame ? frame->GetFrameSelection() : nullptr; | |
| 150 } | |
| 151 | |
| 152 inline dom::Selection* | |
| 153 HyperTextAccessible::DOMSelection() const | |
| 154 { | |
| 155 nsRefPtr<nsFrameSelection> frameSelection = FrameSelection(); | |
| 156 return frameSelection ? | |
| 157 frameSelection->GetSelection(nsISelectionController::SELECTION_NORMAL) : | |
| 158 nullptr; | |
| 159 } | |
| 160 | |
| 161 } // namespace a11y | |
| 162 } // namespace mozilla | |
| 163 | |
| 164 #endif | |
| 165 |
