michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_a11y_HyperTextAccessible_inl_h__
michael@0: #define mozilla_a11y_HyperTextAccessible_inl_h__
michael@0: 
michael@0: #include "HyperTextAccessible.h"
michael@0: 
michael@0: #include "nsAccUtils.h"
michael@0: 
michael@0: #include "nsIClipboard.h"
michael@0: #include "nsIEditor.h"
michael@0: #include "nsIPersistentProperties2.h"
michael@0: #include "nsIPlaintextEditor.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace a11y {
michael@0: 
michael@0: inline bool
michael@0: HyperTextAccessible::IsValidOffset(int32_t aOffset)
michael@0: {
michael@0:   int32_t offset = ConvertMagicOffset(aOffset);
michael@0:   return offset >= 0 && offset <= static_cast<int32_t>(CharacterCount());
michael@0: }
michael@0: 
michael@0: inline bool
michael@0: HyperTextAccessible::IsValidRange(int32_t aStartOffset, int32_t aEndOffset)
michael@0: {
michael@0:   int32_t startOffset = ConvertMagicOffset(aStartOffset);
michael@0:   if (startOffset < 0)
michael@0:     return false;
michael@0: 
michael@0:   int32_t endOffset = ConvertMagicOffset(aEndOffset);
michael@0:   if (endOffset < 0 || startOffset > endOffset)
michael@0:     return false;
michael@0: 
michael@0:   return endOffset <= static_cast<int32_t>(CharacterCount());
michael@0: }
michael@0: 
michael@0: inline bool
michael@0: HyperTextAccessible::AddToSelection(int32_t aStartOffset, int32_t aEndOffset)
michael@0: {
michael@0:   dom::Selection* domSel = DOMSelection();
michael@0:   return domSel &&
michael@0:     SetSelectionBoundsAt(domSel->GetRangeCount(), aStartOffset, aEndOffset);
michael@0: }
michael@0: 
michael@0: inline void
michael@0: HyperTextAccessible::ReplaceText(const nsAString& aText)
michael@0: {
michael@0:   int32_t numChars = CharacterCount();
michael@0:   if (numChars != 0)
michael@0:     DeleteText(0, numChars);
michael@0: 
michael@0:   InsertText(aText, 0);
michael@0: }
michael@0: 
michael@0: inline void
michael@0: HyperTextAccessible::InsertText(const nsAString& aText, int32_t aPosition)
michael@0: {
michael@0:   nsCOMPtr<nsIEditor> editor = GetEditor();
michael@0:   nsCOMPtr<nsIPlaintextEditor> peditor(do_QueryInterface(editor));
michael@0:   if (peditor) {
michael@0:     SetSelectionRange(aPosition, aPosition);
michael@0:     peditor->InsertText(aText);
michael@0:   }
michael@0: }
michael@0: 
michael@0: inline void
michael@0: HyperTextAccessible::CopyText(int32_t aStartPos, int32_t aEndPos)
michael@0:   {
michael@0:     nsCOMPtr<nsIEditor> editor = GetEditor();
michael@0:     if (editor) {
michael@0:       SetSelectionRange(aStartPos, aEndPos);
michael@0:       editor->Copy();
michael@0:     }
michael@0:   }
michael@0: 
michael@0: inline void
michael@0: HyperTextAccessible::CutText(int32_t aStartPos, int32_t aEndPos)
michael@0:   {
michael@0:     nsCOMPtr<nsIEditor> editor = GetEditor();
michael@0:     if (editor) {
michael@0:       SetSelectionRange(aStartPos, aEndPos);
michael@0:       editor->Cut();
michael@0:     }
michael@0:   }
michael@0: 
michael@0: inline void
michael@0: HyperTextAccessible::DeleteText(int32_t aStartPos, int32_t aEndPos)
michael@0: {
michael@0:   nsCOMPtr<nsIEditor> editor = GetEditor();
michael@0:   if (editor) {
michael@0:     SetSelectionRange(aStartPos, aEndPos);
michael@0:     editor->DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
michael@0:   }
michael@0: }
michael@0: 
michael@0: inline void
michael@0: HyperTextAccessible::PasteText(int32_t aPosition)
michael@0: {
michael@0:   nsCOMPtr<nsIEditor> editor = GetEditor();
michael@0:   if (editor) {
michael@0:     SetSelectionRange(aPosition, aPosition);
michael@0:     editor->Paste(nsIClipboard::kGlobalClipboard);
michael@0:   }
michael@0: }
michael@0: 
michael@0: inline int32_t
michael@0: HyperTextAccessible::ConvertMagicOffset(int32_t aOffset)
michael@0: {
michael@0:   if (aOffset == nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT)
michael@0:     return CharacterCount();
michael@0: 
michael@0:   if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
michael@0:     return CaretOffset();
michael@0: 
michael@0:   return aOffset;
michael@0: }
michael@0: 
michael@0: inline int32_t
michael@0: HyperTextAccessible::AdjustCaretOffset(int32_t aOffset) const
michael@0: {
michael@0:   // It is the same character offset when the caret is visually at the very
michael@0:   // end of a line or the start of a new line (soft line break). Getting text
michael@0:   // at the line should provide the line with the visual caret, otherwise
michael@0:   // screen readers will announce the wrong line as the user presses up or
michael@0:   // down arrow and land at the end of a line.
michael@0:   if (aOffset > 0 && IsCaretAtEndOfLine())
michael@0:     return aOffset - 1;
michael@0: 
michael@0:   return aOffset;
michael@0: }
michael@0: 
michael@0: inline bool
michael@0: HyperTextAccessible::IsCaretAtEndOfLine() const
michael@0: {
michael@0:   nsRefPtr<nsFrameSelection> frameSelection = FrameSelection();
michael@0:   return frameSelection &&
michael@0:     frameSelection->GetHint() == nsFrameSelection::HINTLEFT;
michael@0: }
michael@0: 
michael@0: inline already_AddRefed<nsFrameSelection>
michael@0: HyperTextAccessible::FrameSelection() const
michael@0: {
michael@0:   nsIFrame* frame = GetFrame();
michael@0:   return frame ? frame->GetFrameSelection() : nullptr;
michael@0: }
michael@0: 
michael@0: inline dom::Selection*
michael@0: HyperTextAccessible::DOMSelection() const
michael@0: {
michael@0:   nsRefPtr<nsFrameSelection> frameSelection = FrameSelection();
michael@0:   return frameSelection ?
michael@0:     frameSelection->GetSelection(nsISelectionController::SELECTION_NORMAL) :
michael@0:     nullptr;
michael@0: }
michael@0: 
michael@0: } // namespace a11y
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif
michael@0: