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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 "nsFrameSelection.h"
#include "mozilla/TextEditor.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) {
if (aText.Length() == 0) {
DeleteText(0, CharacterCount());
return;
}
SetSelectionRange(0, CharacterCount());
RefPtr<TextEditor> textEditor = GetEditor();
if (!textEditor) {
return;
}
DebugOnly<nsresult> rv = textEditor->InsertTextAsAction(aText);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to insert the new text");
}
inline void HyperTextAccessible::InsertText(const nsAString& aText,
int32_t aPosition) {
RefPtr<TextEditor> textEditor = GetEditor();
if (textEditor) {
SetSelectionRange(aPosition, aPosition);
DebugOnly<nsresult> rv = textEditor->InsertTextAsAction(aText);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to insert the text");
}
}
inline void HyperTextAccessible::CopyText(int32_t aStartPos, int32_t aEndPos) {
RefPtr<TextEditor> textEditor = GetEditor();
if (textEditor) {
SetSelectionRange(aStartPos, aEndPos);
textEditor->Copy();
}
}
inline void HyperTextAccessible::CutText(int32_t aStartPos, int32_t aEndPos) {
RefPtr<TextEditor> textEditor = GetEditor();
if (textEditor) {
SetSelectionRange(aStartPos, aEndPos);
textEditor->Cut();
}
}
inline void HyperTextAccessible::DeleteText(int32_t aStartPos,
int32_t aEndPos) {
RefPtr<TextEditor> textEditor = GetEditor();
if (!textEditor) {
return;
}
SetSelectionRange(aStartPos, aEndPos);
DebugOnly<nsresult> rv =
textEditor->DeleteSelectionAsAction(nsIEditor::eNone, nsIEditor::eStrip);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to delete text");
}
inline void HyperTextAccessible::PasteText(int32_t aPosition) {
RefPtr<TextEditor> textEditor = GetEditor();
if (textEditor) {
SetSelectionRange(aPosition, aPosition);
textEditor->PasteAsAction(nsIClipboard::kGlobalClipboard, true);
}
}
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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