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