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97 lines
4.2 KiB
C++
97 lines
4.2 KiB
C++
/*
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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* Copyright (C) 2010 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef SKY_ENGINE_CORE_EDITING_EDITINGBEHAVIOR_H_
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#define SKY_ENGINE_CORE_EDITING_EDITINGBEHAVIOR_H_
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namespace blink {
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class KeyboardEvent;
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class EditingBehavior {
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public:
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explicit EditingBehavior()
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{
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}
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// Individual functions for each case where we have more than one style of editing behavior.
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// Create a new function for any platform difference so we can control it here.
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// When extending a selection beyond the top or bottom boundary of an editable area,
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// maintain the horizontal position on Windows and Android but extend it to the boundary of
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// the editable content on Mac and Linux.
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bool shouldMoveCaretToHorizontalBoundaryWhenPastTopOrBottom() const
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{
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return false;
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}
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// On Windows, selections should always be considered as directional, regardless if it is
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// mouse-based or keyboard-based.
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bool shouldConsiderSelectionAsDirectional() const { return true; }
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// On Mac, style is considered present when present at the beginning of selection. On other platforms,
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// style has to be present throughout the selection.
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bool shouldToggleStyleBasedOnStartOfSelection() const { return false; }
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// Standard Mac behavior when extending to a boundary is grow the selection rather than leaving the base
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// in place and moving the extent. Matches NSTextView.
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bool shouldAlwaysGrowSelectionWhenExtendingToBoundary() const { return false; }
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// On Mac, when processing a contextual click, the object being clicked upon should be selected.
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bool shouldSelectOnContextualMenuClick() const { return false; }
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// On Mac and Windows, pressing backspace (when it isn't handled otherwise) should navigate back.
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bool shouldNavigateBackOnBackspace() const
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{
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return false;
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}
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// On Mac, selecting backwards by word/line from the middle of a word/line, and then going
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// forward leaves the caret back in the middle with no selection, instead of directly selecting
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// to the other end of the line/word (Unix/Windows behavior).
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bool shouldExtendSelectionByWordOrLineAcrossCaret() const { return true; }
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// Based on native behavior, when using ctrl(alt)+arrow to move caret by word, ctrl(alt)+left arrow moves caret to
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// immediately before the word in all platforms, for example, the word break positions are: "|abc |def |hij |opq".
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// But ctrl+right arrow moves caret to "abc |def |hij |opq" on Windows and "abc| def| hij| opq|" on Mac and Linux.
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bool shouldSkipSpaceWhenMovingRight() const { return false; }
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// On Mac, undo of delete/forward-delete of text should select the deleted text. On other platforms deleted text
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// should not be selected and the cursor should be placed where the deletion started.
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bool shouldUndoOfDeleteSelectText() const { return false; }
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// Support for global selections, used on platforms like the X Window
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// System that treat selection as a type of clipboard.
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bool supportsGlobalSelection() const
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{
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return false;
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}
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// Convert a KeyboardEvent to a command name like "Copy", "Undo" and so on.
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// If nothing, return empty string.
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const char* interpretKeyEvent(const KeyboardEvent&) const;
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bool shouldInsertCharacter(const KeyboardEvent&) const;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_EDITING_EDITINGBEHAVIOR_H_
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