| /* |
| * Copyright (C) 2006, 2007 Apple, Inc. All rights reserved. |
| * Copyright (C) 2012 Google, Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "core/editing/EditingBehavior.h" |
| |
| #include "core/events/KeyboardEvent.h" |
| #include "platform/KeyboardCodes.h" |
| #include "platform/PlatformKeyboardEvent.h" |
| |
| namespace blink { |
| |
| // |
| // The below code was adapted from the WebKit file webview.cpp |
| // |
| |
| static const unsigned CtrlKey = 1 << 0; |
| static const unsigned AltKey = 1 << 1; |
| static const unsigned ShiftKey = 1 << 2; |
| static const unsigned MetaKey = 1 << 3; |
| #if OS(MACOSX) |
| // Aliases for the generic key defintions to make kbd shortcuts definitions more |
| // readable on OS X. |
| static const unsigned OptionKey = AltKey; |
| |
| // Do not use this constant for anything but cursor movement commands. Keys |
| // with cmd set have their |isSystemKey| bit set, so chances are the shortcut |
| // will not be executed. Another, less important, reason is that shortcuts |
| // defined in the layoutObject do not blink the menu item that they triggered. See |
| // http://crbug.com/25856 and the bugs linked from there for details. |
| static const unsigned CommandKey = MetaKey; |
| #endif |
| |
| // Keys with special meaning. These will be delegated to the editor using |
| // the execCommand() method |
| struct KeyDownEntry { |
| unsigned virtualKey; |
| unsigned modifiers; |
| const char* name; |
| }; |
| |
| struct KeyPressEntry { |
| unsigned charCode; |
| unsigned modifiers; |
| const char* name; |
| }; |
| |
| // Key bindings with command key on Mac and alt key on other platforms are |
| // marked as system key events and will be ignored (with the exception |
| // of Command-B and Command-I) so they shouldn't be added here. |
| static const KeyDownEntry keyDownEntries[] = { |
| { VKEY_LEFT, 0, "MoveLeft" }, |
| { VKEY_LEFT, ShiftKey, "MoveLeftAndModifySelection" }, |
| #if OS(MACOSX) |
| { VKEY_LEFT, OptionKey, "MoveWordLeft" }, |
| { VKEY_LEFT, OptionKey | ShiftKey, |
| "MoveWordLeftAndModifySelection" }, |
| #else |
| { VKEY_LEFT, CtrlKey, "MoveWordLeft" }, |
| { VKEY_LEFT, CtrlKey | ShiftKey, |
| "MoveWordLeftAndModifySelection" }, |
| #endif |
| { VKEY_RIGHT, 0, "MoveRight" }, |
| { VKEY_RIGHT, ShiftKey, "MoveRightAndModifySelection" }, |
| #if OS(MACOSX) |
| { VKEY_RIGHT, OptionKey, "MoveWordRight" }, |
| { VKEY_RIGHT, OptionKey | ShiftKey, "MoveWordRightAndModifySelection" }, |
| #else |
| { VKEY_RIGHT, CtrlKey, "MoveWordRight" }, |
| { VKEY_RIGHT, CtrlKey | ShiftKey, "MoveWordRightAndModifySelection" }, |
| #endif |
| { VKEY_UP, 0, "MoveUp" }, |
| { VKEY_UP, ShiftKey, "MoveUpAndModifySelection" }, |
| { VKEY_PRIOR, ShiftKey, "MovePageUpAndModifySelection" }, |
| { VKEY_DOWN, 0, "MoveDown" }, |
| { VKEY_DOWN, ShiftKey, "MoveDownAndModifySelection" }, |
| { VKEY_NEXT, ShiftKey, "MovePageDownAndModifySelection" }, |
| #if !OS(MACOSX) |
| { VKEY_UP, CtrlKey, "MoveParagraphBackward" }, |
| { VKEY_UP, CtrlKey | ShiftKey, "MoveParagraphBackwardAndModifySelection" }, |
| { VKEY_DOWN, CtrlKey, "MoveParagraphForward" }, |
| { VKEY_DOWN, CtrlKey | ShiftKey, "MoveParagraphForwardAndModifySelection" }, |
| { VKEY_PRIOR, 0, "MovePageUp" }, |
| { VKEY_NEXT, 0, "MovePageDown" }, |
| #endif |
| { VKEY_HOME, 0, "MoveToBeginningOfLine" }, |
| { VKEY_HOME, ShiftKey, |
| "MoveToBeginningOfLineAndModifySelection" }, |
| #if OS(MACOSX) |
| { VKEY_PRIOR, OptionKey, "MovePageUp" }, |
| { VKEY_NEXT, OptionKey, "MovePageDown" }, |
| #endif |
| #if !OS(MACOSX) |
| { VKEY_HOME, CtrlKey, "MoveToBeginningOfDocument" }, |
| { VKEY_HOME, CtrlKey | ShiftKey, |
| "MoveToBeginningOfDocumentAndModifySelection" }, |
| #endif |
| { VKEY_END, 0, "MoveToEndOfLine" }, |
| { VKEY_END, ShiftKey, "MoveToEndOfLineAndModifySelection" }, |
| #if !OS(MACOSX) |
| { VKEY_END, CtrlKey, "MoveToEndOfDocument" }, |
| { VKEY_END, CtrlKey | ShiftKey, |
| "MoveToEndOfDocumentAndModifySelection" }, |
| #endif |
| { VKEY_BACK, 0, "DeleteBackward" }, |
| { VKEY_BACK, ShiftKey, "DeleteBackward" }, |
| { VKEY_DELETE, 0, "DeleteForward" }, |
| #if OS(MACOSX) |
| { VKEY_BACK, OptionKey, "DeleteWordBackward" }, |
| { VKEY_DELETE, OptionKey, "DeleteWordForward" }, |
| #else |
| { VKEY_BACK, CtrlKey, "DeleteWordBackward" }, |
| { VKEY_DELETE, CtrlKey, "DeleteWordForward" }, |
| #endif |
| #if OS(MACOSX) |
| { 'B', CommandKey, "ToggleBold" }, |
| { 'I', CommandKey, "ToggleItalic" }, |
| #else |
| { 'B', CtrlKey, "ToggleBold" }, |
| { 'I', CtrlKey, "ToggleItalic" }, |
| #endif |
| { 'U', CtrlKey, "ToggleUnderline" }, |
| { VKEY_ESCAPE, 0, "Cancel" }, |
| { VKEY_OEM_PERIOD, CtrlKey, "Cancel" }, |
| { VKEY_TAB, 0, "InsertTab" }, |
| { VKEY_TAB, ShiftKey, "InsertBacktab" }, |
| { VKEY_RETURN, 0, "InsertNewline" }, |
| { VKEY_RETURN, CtrlKey, "InsertNewline" }, |
| { VKEY_RETURN, AltKey, "InsertNewline" }, |
| { VKEY_RETURN, AltKey | ShiftKey, "InsertNewline" }, |
| { VKEY_RETURN, ShiftKey, "InsertLineBreak" }, |
| { VKEY_INSERT, CtrlKey, "Copy" }, |
| { VKEY_INSERT, ShiftKey, "Paste" }, |
| { VKEY_DELETE, ShiftKey, "Cut" }, |
| #if !OS(MACOSX) |
| // On OS X, we pipe these back to the browser, so that it can do menu item |
| // blinking. |
| { 'C', CtrlKey, "Copy" }, |
| { 'V', CtrlKey, "Paste" }, |
| { 'V', CtrlKey | ShiftKey, "PasteAndMatchStyle" }, |
| { 'X', CtrlKey, "Cut" }, |
| { 'A', CtrlKey, "SelectAll" }, |
| { 'Z', CtrlKey, "Undo" }, |
| { 'Z', CtrlKey | ShiftKey, "Redo" }, |
| { 'Y', CtrlKey, "Redo" }, |
| #endif |
| { VKEY_INSERT, 0, "OverWrite" }, |
| }; |
| |
| static const KeyPressEntry keyPressEntries[] = { |
| { '\t', 0, "InsertTab" }, |
| { '\t', ShiftKey, "InsertBacktab" }, |
| { '\r', 0, "InsertNewline" }, |
| { '\r', CtrlKey, "InsertNewline" }, |
| { '\r', ShiftKey, "InsertLineBreak" }, |
| { '\r', AltKey, "InsertNewline" }, |
| { '\r', AltKey | ShiftKey, "InsertNewline" }, |
| }; |
| |
| const char* EditingBehavior::interpretKeyEvent(const KeyboardEvent& event) const |
| { |
| const PlatformKeyboardEvent* keyEvent = event.keyEvent(); |
| if (!keyEvent) |
| return ""; |
| |
| static HashMap<int, const char*>* keyDownCommandsMap = nullptr; |
| static HashMap<int, const char*>* keyPressCommandsMap = nullptr; |
| |
| if (!keyDownCommandsMap) { |
| keyDownCommandsMap = new HashMap<int, const char*>; |
| keyPressCommandsMap = new HashMap<int, const char*>; |
| |
| for (unsigned i = 0; i < arraysize(keyDownEntries); i++) { |
| keyDownCommandsMap->set(keyDownEntries[i].modifiers << 16 | keyDownEntries[i].virtualKey, keyDownEntries[i].name); |
| } |
| |
| for (unsigned i = 0; i < arraysize(keyPressEntries); i++) { |
| keyPressCommandsMap->set(keyPressEntries[i].modifiers << 16 | keyPressEntries[i].charCode, keyPressEntries[i].name); |
| } |
| } |
| |
| unsigned modifiers = 0; |
| if (keyEvent->shiftKey()) |
| modifiers |= ShiftKey; |
| if (keyEvent->altKey()) |
| modifiers |= AltKey; |
| if (keyEvent->ctrlKey()) |
| modifiers |= CtrlKey; |
| if (keyEvent->metaKey()) |
| modifiers |= MetaKey; |
| |
| if (keyEvent->type() == PlatformEvent::RawKeyDown) { |
| int mapKey = modifiers << 16 | event.keyCode(); |
| return mapKey ? keyDownCommandsMap->get(mapKey) : 0; |
| } |
| |
| int mapKey = modifiers << 16 | event.charCode(); |
| return mapKey ? keyPressCommandsMap->get(mapKey) : 0; |
| } |
| |
| bool EditingBehavior::shouldInsertCharacter(const KeyboardEvent& event) const |
| { |
| if (event.keyEvent()->text().length() != 1) |
| return true; |
| |
| // On Gtk/Linux, it emits key events with ASCII text and ctrl on for ctrl-<x>. |
| // In Webkit, EditorClient::handleKeyboardEvent in |
| // WebKit/gtk/WebCoreSupport/EditorClientGtk.cpp drop such events. |
| // On Mac, it emits key events with ASCII text and meta on for Command-<x>. |
| // These key events should not emit text insert event. |
| // Alt key would be used to insert alternative character, so we should let |
| // through. Also note that Ctrl-Alt combination equals to AltGr key which is |
| // also used to insert alternative character. |
| // http://code.google.com/p/chromium/issues/detail?id=10846 |
| // Windows sets both alt and meta are on when "Alt" key pressed. |
| // http://code.google.com/p/chromium/issues/detail?id=2215 |
| // Also, we should not rely on an assumption that keyboards don't |
| // send ASCII characters when pressing a control key on Windows, |
| // which may be configured to do it so by user. |
| // See also http://en.wikipedia.org/wiki/Keyboard_Layout |
| // FIXME(ukai): investigate more detail for various keyboard layout. |
| UChar ch = event.keyEvent()->text()[0U]; |
| |
| // Don't insert null or control characters as they can result in |
| // unexpected behaviour |
| if (ch < ' ') |
| return false; |
| #if !OS(WIN) |
| // Don't insert ASCII character if ctrl w/o alt or meta is on. |
| // On Mac, we should ignore events when meta is on (Command-<x>). |
| if (ch < 0x80) { |
| if (event.keyEvent()->ctrlKey() && !event.keyEvent()->altKey()) |
| return false; |
| #if OS(MACOSX) |
| if (event.keyEvent()->metaKey()) |
| return false; |
| #endif |
| } |
| #endif |
| |
| return true; |
| } |
| } // namespace blink |
| |
