diff -r 000000000000 -r 6474c204b198 accessible/src/generic/HyperTextAccessible-inl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/generic/HyperTextAccessible-inl.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,165 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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_a11y_HyperTextAccessible_inl_h__
+#define mozilla_a11y_HyperTextAccessible_inl_h__
+
+#include "HyperTextAccessible.h"
+
+#include "nsAccUtils.h"
+
+#include "nsIClipboard.h"
+#include "nsIEditor.h"
+#include "nsIPersistentProperties2.h"
+#include "nsIPlaintextEditor.h"
+
+namespace mozilla {
+namespace a11y {
+
+inline bool
+HyperTextAccessible::IsValidOffset(int32_t aOffset)
+{
+  int32_t offset = ConvertMagicOffset(aOffset);
+  return offset >= 0 && offset <= static_cast<int32_t>(CharacterCount());
+}
+
+inline bool
+HyperTextAccessible::IsValidRange(int32_t aStartOffset, int32_t aEndOffset)
+{
+  int32_t startOffset = ConvertMagicOffset(aStartOffset);
+  if (startOffset < 0)
+    return false;
+
+  int32_t endOffset = ConvertMagicOffset(aEndOffset);
+  if (endOffset < 0 || startOffset > endOffset)
+    return false;
+
+  return endOffset <= static_cast<int32_t>(CharacterCount());
+}
+
+inline bool
+HyperTextAccessible::AddToSelection(int32_t aStartOffset, int32_t aEndOffset)
+{
+  dom::Selection* domSel = DOMSelection();
+  return domSel &&
+    SetSelectionBoundsAt(domSel->GetRangeCount(), aStartOffset, aEndOffset);
+}
+
+inline void
+HyperTextAccessible::ReplaceText(const nsAString& aText)
+{
+  int32_t numChars = CharacterCount();
+  if (numChars != 0)
+    DeleteText(0, numChars);
+
+  InsertText(aText, 0);
+}
+
+inline void
+HyperTextAccessible::InsertText(const nsAString& aText, int32_t aPosition)
+{
+  nsCOMPtr<nsIEditor> editor = GetEditor();
+  nsCOMPtr<nsIPlaintextEditor> peditor(do_QueryInterface(editor));
+  if (peditor) {
+    SetSelectionRange(aPosition, aPosition);
+    peditor->InsertText(aText);
+  }
+}
+
+inline void
+HyperTextAccessible::CopyText(int32_t aStartPos, int32_t aEndPos)
+  {
+    nsCOMPtr<nsIEditor> editor = GetEditor();
+    if (editor) {
+      SetSelectionRange(aStartPos, aEndPos);
+      editor->Copy();
+    }
+  }
+
+inline void
+HyperTextAccessible::CutText(int32_t aStartPos, int32_t aEndPos)
+  {
+    nsCOMPtr<nsIEditor> editor = GetEditor();
+    if (editor) {
+      SetSelectionRange(aStartPos, aEndPos);
+      editor->Cut();
+    }
+  }
+
+inline void
+HyperTextAccessible::DeleteText(int32_t aStartPos, int32_t aEndPos)
+{
+  nsCOMPtr<nsIEditor> editor = GetEditor();
+  if (editor) {
+    SetSelectionRange(aStartPos, aEndPos);
+    editor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
+  }
+}
+
+inline void
+HyperTextAccessible::PasteText(int32_t aPosition)
+{
+  nsCOMPtr<nsIEditor> editor = GetEditor();
+  if (editor) {
+    SetSelectionRange(aPosition, aPosition);
+    editor->Paste(nsIClipboard::kGlobalClipboard);
+  }
+}
+
+inline int32_t
+HyperTextAccessible::ConvertMagicOffset(int32_t aOffset)
+{
+  if (aOffset == nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT)
+    return CharacterCount();
+
+  if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
+    return CaretOffset();
+
+  return aOffset;
+}
+
+inline int32_t
+HyperTextAccessible::AdjustCaretOffset(int32_t aOffset) const
+{
+  // It is the same character offset when the caret is visually at the very
+  // end of a line or the start of a new line (soft line break). Getting text
+  // at the line should provide the line with the visual caret, otherwise
+  // screen readers will announce the wrong line as the user presses up or
+  // down arrow and land at the end of a line.
+  if (aOffset > 0 && IsCaretAtEndOfLine())
+    return aOffset - 1;
+
+  return aOffset;
+}
+
+inline bool
+HyperTextAccessible::IsCaretAtEndOfLine() const
+{
+  nsRefPtr<nsFrameSelection> frameSelection = FrameSelection();
+  return frameSelection &&
+    frameSelection->GetHint() == nsFrameSelection::HINTLEFT;
+}
+
+inline already_AddRefed<nsFrameSelection>
+HyperTextAccessible::FrameSelection() const
+{
+  nsIFrame* frame = GetFrame();
+  return frame ? frame->GetFrameSelection() : nullptr;
+}
+
+inline dom::Selection*
+HyperTextAccessible::DOMSelection() const
+{
+  nsRefPtr<nsFrameSelection> frameSelection = FrameSelection();
+  return frameSelection ?
+    frameSelection->GetSelection(nsISelectionController::SELECTION_NORMAL) :
+    nullptr;
+}
+
+} // namespace a11y
+} // namespace mozilla
+
+#endif
+