1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/generic/HyperTextAccessible-inl.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,165 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef mozilla_a11y_HyperTextAccessible_inl_h__
1.10 +#define mozilla_a11y_HyperTextAccessible_inl_h__
1.11 +
1.12 +#include "HyperTextAccessible.h"
1.13 +
1.14 +#include "nsAccUtils.h"
1.15 +
1.16 +#include "nsIClipboard.h"
1.17 +#include "nsIEditor.h"
1.18 +#include "nsIPersistentProperties2.h"
1.19 +#include "nsIPlaintextEditor.h"
1.20 +
1.21 +namespace mozilla {
1.22 +namespace a11y {
1.23 +
1.24 +inline bool
1.25 +HyperTextAccessible::IsValidOffset(int32_t aOffset)
1.26 +{
1.27 + int32_t offset = ConvertMagicOffset(aOffset);
1.28 + return offset >= 0 && offset <= static_cast<int32_t>(CharacterCount());
1.29 +}
1.30 +
1.31 +inline bool
1.32 +HyperTextAccessible::IsValidRange(int32_t aStartOffset, int32_t aEndOffset)
1.33 +{
1.34 + int32_t startOffset = ConvertMagicOffset(aStartOffset);
1.35 + if (startOffset < 0)
1.36 + return false;
1.37 +
1.38 + int32_t endOffset = ConvertMagicOffset(aEndOffset);
1.39 + if (endOffset < 0 || startOffset > endOffset)
1.40 + return false;
1.41 +
1.42 + return endOffset <= static_cast<int32_t>(CharacterCount());
1.43 +}
1.44 +
1.45 +inline bool
1.46 +HyperTextAccessible::AddToSelection(int32_t aStartOffset, int32_t aEndOffset)
1.47 +{
1.48 + dom::Selection* domSel = DOMSelection();
1.49 + return domSel &&
1.50 + SetSelectionBoundsAt(domSel->GetRangeCount(), aStartOffset, aEndOffset);
1.51 +}
1.52 +
1.53 +inline void
1.54 +HyperTextAccessible::ReplaceText(const nsAString& aText)
1.55 +{
1.56 + int32_t numChars = CharacterCount();
1.57 + if (numChars != 0)
1.58 + DeleteText(0, numChars);
1.59 +
1.60 + InsertText(aText, 0);
1.61 +}
1.62 +
1.63 +inline void
1.64 +HyperTextAccessible::InsertText(const nsAString& aText, int32_t aPosition)
1.65 +{
1.66 + nsCOMPtr<nsIEditor> editor = GetEditor();
1.67 + nsCOMPtr<nsIPlaintextEditor> peditor(do_QueryInterface(editor));
1.68 + if (peditor) {
1.69 + SetSelectionRange(aPosition, aPosition);
1.70 + peditor->InsertText(aText);
1.71 + }
1.72 +}
1.73 +
1.74 +inline void
1.75 +HyperTextAccessible::CopyText(int32_t aStartPos, int32_t aEndPos)
1.76 + {
1.77 + nsCOMPtr<nsIEditor> editor = GetEditor();
1.78 + if (editor) {
1.79 + SetSelectionRange(aStartPos, aEndPos);
1.80 + editor->Copy();
1.81 + }
1.82 + }
1.83 +
1.84 +inline void
1.85 +HyperTextAccessible::CutText(int32_t aStartPos, int32_t aEndPos)
1.86 + {
1.87 + nsCOMPtr<nsIEditor> editor = GetEditor();
1.88 + if (editor) {
1.89 + SetSelectionRange(aStartPos, aEndPos);
1.90 + editor->Cut();
1.91 + }
1.92 + }
1.93 +
1.94 +inline void
1.95 +HyperTextAccessible::DeleteText(int32_t aStartPos, int32_t aEndPos)
1.96 +{
1.97 + nsCOMPtr<nsIEditor> editor = GetEditor();
1.98 + if (editor) {
1.99 + SetSelectionRange(aStartPos, aEndPos);
1.100 + editor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
1.101 + }
1.102 +}
1.103 +
1.104 +inline void
1.105 +HyperTextAccessible::PasteText(int32_t aPosition)
1.106 +{
1.107 + nsCOMPtr<nsIEditor> editor = GetEditor();
1.108 + if (editor) {
1.109 + SetSelectionRange(aPosition, aPosition);
1.110 + editor->Paste(nsIClipboard::kGlobalClipboard);
1.111 + }
1.112 +}
1.113 +
1.114 +inline int32_t
1.115 +HyperTextAccessible::ConvertMagicOffset(int32_t aOffset)
1.116 +{
1.117 + if (aOffset == nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT)
1.118 + return CharacterCount();
1.119 +
1.120 + if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
1.121 + return CaretOffset();
1.122 +
1.123 + return aOffset;
1.124 +}
1.125 +
1.126 +inline int32_t
1.127 +HyperTextAccessible::AdjustCaretOffset(int32_t aOffset) const
1.128 +{
1.129 + // It is the same character offset when the caret is visually at the very
1.130 + // end of a line or the start of a new line (soft line break). Getting text
1.131 + // at the line should provide the line with the visual caret, otherwise
1.132 + // screen readers will announce the wrong line as the user presses up or
1.133 + // down arrow and land at the end of a line.
1.134 + if (aOffset > 0 && IsCaretAtEndOfLine())
1.135 + return aOffset - 1;
1.136 +
1.137 + return aOffset;
1.138 +}
1.139 +
1.140 +inline bool
1.141 +HyperTextAccessible::IsCaretAtEndOfLine() const
1.142 +{
1.143 + nsRefPtr<nsFrameSelection> frameSelection = FrameSelection();
1.144 + return frameSelection &&
1.145 + frameSelection->GetHint() == nsFrameSelection::HINTLEFT;
1.146 +}
1.147 +
1.148 +inline already_AddRefed<nsFrameSelection>
1.149 +HyperTextAccessible::FrameSelection() const
1.150 +{
1.151 + nsIFrame* frame = GetFrame();
1.152 + return frame ? frame->GetFrameSelection() : nullptr;
1.153 +}
1.154 +
1.155 +inline dom::Selection*
1.156 +HyperTextAccessible::DOMSelection() const
1.157 +{
1.158 + nsRefPtr<nsFrameSelection> frameSelection = FrameSelection();
1.159 + return frameSelection ?
1.160 + frameSelection->GetSelection(nsISelectionController::SELECTION_NORMAL) :
1.161 + nullptr;
1.162 +}
1.163 +
1.164 +} // namespace a11y
1.165 +} // namespace mozilla
1.166 +
1.167 +#endif
1.168 +
