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3ddae5ea36
This CL moves KeyboardEvents from the old event model to NewEventHandler. This CL keeps the basic structure of keydown, keypress, keyup events even though that's a bit wacky. As with pointer and gesture events, this CL removes PlatformKeyboardEvent in favor of just using WebKeyboardEvent. I've also made WebKeyboardEvent align more closely with Mojo's keyboard event. The CL does change one important aspect of key event handling: on the web the "keyCode" property of KeyboardEvent changes its meaning depending on whether the event is a keydown or a keypress event. For the former events, keyCode is the "virtual" (i.e., windows) key code where for the latter events, keyCode is the character code. To be more precise, I've renamed keyCode to virtualKeyCode and I've given it a zero (unknown key code) value during keypress events. R=ojan@chromium.org, eseidel@chromium.org Review URL: https://codereview.chromium.org/872233002
199 lines
9.1 KiB
C++
199 lines
9.1 KiB
C++
/*
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* Copyright (C) 2006, 2007 Apple, Inc. All rights reserved.
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* Copyright (C) 2012 Google, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sky/engine/config.h"
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#include "sky/engine/core/editing/EditingBehavior.h"
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#include "gen/sky/core/EventTypeNames.h"
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#include "sky/engine/core/events/KeyboardEvent.h"
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#include "sky/engine/platform/KeyboardCodes.h"
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namespace blink {
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//
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// The below code was adapted from the WebKit file webview.cpp
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//
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static const unsigned CtrlKey = 1 << 0;
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static const unsigned AltKey = 1 << 1;
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static const unsigned ShiftKey = 1 << 2;
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static const unsigned MetaKey = 1 << 3;
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#if OS(MACOSX)
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// Aliases for the generic key defintions to make kbd shortcuts definitions more
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// readable on OS X.
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static const unsigned OptionKey = AltKey;
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// Do not use this constant for anything but cursor movement commands. Keys
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// with cmd set have their |isSystemKey| bit set, so chances are the shortcut
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// will not be executed. Another, less important, reason is that shortcuts
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// defined in the renderer do not blink the menu item that they triggered. See
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// http://crbug.com/25856 and the bugs linked from there for details.
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static const unsigned CommandKey = MetaKey;
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#endif
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// Keys with special meaning. These will be delegated to the editor using
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// the execCommand() method
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struct KeyDownEntry {
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unsigned virtualKey;
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unsigned modifiers;
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const char* name;
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};
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struct KeyPressEntry {
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unsigned charCode;
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unsigned modifiers;
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const char* name;
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};
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static const KeyDownEntry keyDownEntries[] = {
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{ VKEY_LEFT, 0, "MoveLeft" },
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{ VKEY_LEFT, ShiftKey, "MoveLeftAndModifySelection" },
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{ VKEY_LEFT, CtrlKey, "MoveWordLeft" },
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{ VKEY_LEFT, CtrlKey | ShiftKey,
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"MoveWordLeftAndModifySelection" },
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{ VKEY_RIGHT, 0, "MoveRight" },
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{ VKEY_RIGHT, ShiftKey, "MoveRightAndModifySelection" },
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{ VKEY_RIGHT, CtrlKey, "MoveWordRight" },
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{ VKEY_RIGHT, CtrlKey | ShiftKey, "MoveWordRightAndModifySelection" },
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{ VKEY_UP, 0, "MoveUp" },
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{ VKEY_UP, ShiftKey, "MoveUpAndModifySelection" },
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{ VKEY_PRIOR, ShiftKey, "MovePageUpAndModifySelection" },
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{ VKEY_DOWN, 0, "MoveDown" },
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{ VKEY_DOWN, ShiftKey, "MoveDownAndModifySelection" },
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{ VKEY_NEXT, ShiftKey, "MovePageDownAndModifySelection" },
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{ VKEY_UP, CtrlKey, "MoveParagraphBackward" },
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{ VKEY_UP, CtrlKey | ShiftKey, "MoveParagraphBackwardAndModifySelection" },
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{ VKEY_DOWN, CtrlKey, "MoveParagraphForward" },
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{ VKEY_DOWN, CtrlKey | ShiftKey, "MoveParagraphForwardAndModifySelection" },
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{ VKEY_PRIOR, 0, "MovePageUp" },
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{ VKEY_NEXT, 0, "MovePageDown" },
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{ VKEY_HOME, 0, "MoveToBeginningOfLine" },
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{ VKEY_HOME, ShiftKey,
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"MoveToBeginningOfLineAndModifySelection" },
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{ VKEY_HOME, CtrlKey, "MoveToBeginningOfDocument" },
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{ VKEY_HOME, CtrlKey | ShiftKey,
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"MoveToBeginningOfDocumentAndModifySelection" },
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{ VKEY_END, 0, "MoveToEndOfLine" },
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{ VKEY_END, ShiftKey, "MoveToEndOfLineAndModifySelection" },
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{ VKEY_END, CtrlKey, "MoveToEndOfDocument" },
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{ VKEY_END, CtrlKey | ShiftKey,
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"MoveToEndOfDocumentAndModifySelection" },
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{ VKEY_BACK, 0, "DeleteBackward" },
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{ VKEY_DELETE, 0, "DeleteForward" },
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{ VKEY_BACK, CtrlKey, "DeleteWordBackward" },
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{ VKEY_DELETE, CtrlKey, "DeleteWordForward" },
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{ VKEY_RETURN, 0, "InsertNewline" },
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{ 'C', CtrlKey, "Copy" },
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{ 'V', CtrlKey, "Paste" },
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{ 'V', CtrlKey | ShiftKey, "PasteAndMatchStyle" },
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{ 'X', CtrlKey, "Cut" },
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{ 'A', CtrlKey, "SelectAll" },
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{ VKEY_INSERT, 0, "OverWrite" },
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};
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static const KeyPressEntry keyPressEntries[] = {
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{ '\r', 0, "InsertNewline" },
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};
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const char* EditingBehavior::interpretKeyEvent(const KeyboardEvent& event) const
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{
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static HashMap<int, const char*>* keyDownCommandsMap = 0;
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static HashMap<int, const char*>* keyPressCommandsMap = 0;
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if (!keyDownCommandsMap) {
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keyDownCommandsMap = new HashMap<int, const char*>;
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keyPressCommandsMap = new HashMap<int, const char*>;
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for (unsigned i = 0; i < arraysize(keyDownEntries); i++) {
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keyDownCommandsMap->set(keyDownEntries[i].modifiers << 16 | keyDownEntries[i].virtualKey, keyDownEntries[i].name);
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}
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for (unsigned i = 0; i < arraysize(keyPressEntries); i++) {
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keyPressCommandsMap->set(keyPressEntries[i].modifiers << 16 | keyPressEntries[i].charCode, keyPressEntries[i].name);
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}
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}
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unsigned modifiers = 0;
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if (event.shiftKey())
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modifiers |= ShiftKey;
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if (event.altKey())
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modifiers |= AltKey;
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if (event.ctrlKey())
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modifiers |= CtrlKey;
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if (event.metaKey())
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modifiers |= MetaKey;
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if (event.type() == EventTypeNames::keydown) {
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int mapKey = modifiers << 16 | event.key();
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return mapKey ? keyDownCommandsMap->get(mapKey) : 0;
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}
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int mapKey = modifiers << 16 | event.charCode();
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return mapKey ? keyPressCommandsMap->get(mapKey) : 0;
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}
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bool EditingBehavior::shouldInsertCharacter(const KeyboardEvent& event) const
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{
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// On Gtk/Linux, it emits key events with ASCII text and ctrl on for ctrl-<x>.
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// In Webkit, EditorClient::handleKeyboardEvent in
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// WebKit/gtk/WebCoreSupport/EditorClientGtk.cpp drop such events.
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// On Mac, it emits key events with ASCII text and meta on for Command-<x>.
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// These key events should not emit text insert event.
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// Alt key would be used to insert alternative character, so we should let
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// through. Also note that Ctrl-Alt combination equals to AltGr key which is
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// also used to insert alternative character.
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// http://code.google.com/p/chromium/issues/detail?id=10846
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// Windows sets both alt and meta are on when "Alt" key pressed.
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// http://code.google.com/p/chromium/issues/detail?id=2215
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// Also, we should not rely on an assumption that keyboards don't
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// send ASCII characters when pressing a control key on Windows,
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// which may be configured to do it so by user.
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// See also http://en.wikipedia.org/wiki/Keyboard_Layout
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// FIXME(ukai): investigate more detail for various keyboard layout.
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UChar ch = event.charCode();
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// Don't insert null or control characters as they can result in
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// unexpected behaviour
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if (ch < ' ')
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return false;
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#if !OS(WIN)
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// Don't insert ASCII character if ctrl w/o alt or meta is on.
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// On Mac, we should ignore events when meta is on (Command-<x>).
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if (ch < 0x80) {
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if (event.ctrlKey() && !event.altKey())
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return false;
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#if OS(MACOSX)
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if (event.metaKey())
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return false;
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#endif
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}
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#endif
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return true;
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}
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} // namespace blink
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