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/* -*- 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"
#include "nsFrameSelection.h"
namespace mozilla {
namespace a11y {
inline bool
HyperTextAccessible::IsValidOffset(int32_t aOffset)
{
index_t offset = ConvertMagicOffset(aOffset);
return offset.IsValid() && offset <= CharacterCount();
}
inline bool
HyperTextAccessible::IsValidRange(int32_t aStartOffset, int32_t aEndOffset)
{
index_t startOffset = ConvertMagicOffset(aStartOffset);
index_t endOffset = ConvertMagicOffset(aEndOffset);
return startOffset.IsValid() && endOffset.IsValid() &&
startOffset <= endOffset && endOffset <= CharacterCount();
}
inline void
HyperTextAccessible::SetCaretOffset(int32_t aOffset)
{
SetSelectionRange(aOffset, aOffset);
// XXX: Force cache refresh until a good solution for AT emulation of user
// input is implemented (AccessFu caret movement).
SelectionMgr()->UpdateCaretOffset(this, aOffset);
}
inline bool
HyperTextAccessible::AddToSelection(int32_t aStartOffset, int32_t aEndOffset)
{
dom::Selection* domSel = DOMSelection();
return domSel &&
SetSelectionBoundsAt(domSel->RangeCount(), aStartOffset, aEndOffset);
}
inline void
HyperTextAccessible::ReplaceText(const nsAString& aText)
{
// We need to call DeleteText() even if there is no contents because we need
// to ensure to move focus to the editor via SetSelectionRange() called in
// DeleteText().
DeleteText(0, CharacterCount());
nsCOMPtr<nsIEditor> editor = GetEditor();
nsCOMPtr<nsIPlaintextEditor> plaintextEditor(do_QueryInterface(editor));
if (!plaintextEditor) {
return;
}
// DeleteText() may cause inserting <br> element in some cases. Let's
// select all again and replace whole contents.
editor->SelectAll();
plaintextEditor->InsertText(aText);
}
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 index_t
HyperTextAccessible::ConvertMagicOffset(int32_t aOffset) const
{
if (aOffset == nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT)
return CharacterCount();
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
return CaretOffset();
return aOffset;
}
inline uint32_t
HyperTextAccessible::AdjustCaretOffset(uint32_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
{
RefPtr<nsFrameSelection> frameSelection = FrameSelection();
return frameSelection &&
frameSelection->GetHint() == CARET_ASSOCIATE_BEFORE;
}
inline already_AddRefed<nsFrameSelection>
HyperTextAccessible::FrameSelection() const
{
nsIFrame* frame = GetFrame();
return frame ? frame->GetFrameSelection() : nullptr;
}
inline dom::Selection*
HyperTextAccessible::DOMSelection() const
{
RefPtr<nsFrameSelection> frameSelection = FrameSelection();
return frameSelection ? frameSelection->GetSelection(SelectionType::eNormal) :
nullptr;
}
} // namespace a11y
} // namespace mozilla
#endif
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