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/*
* Copyright (C) 2020-2022 Yomichan Authors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* global
* DocumentUtil
* HotkeyUtil
*/
class KeyboardMouseInputField extends EventDispatcher {
constructor(inputNode, mouseButton, os, isPointerTypeSupported=null) {
super();
this._inputNode = inputNode;
this._mouseButton = mouseButton;
this._isPointerTypeSupported = isPointerTypeSupported;
this._hotkeyUtil = new HotkeyUtil(os);
this._eventListeners = new EventListenerCollection();
this._key = null;
this._modifiers = [];
this._penPointerIds = new Set();
this._mouseModifiersSupported = false;
this._keySupported = false;
}
get modifiers() {
return this._modifiers;
}
prepare(key, modifiers, mouseModifiersSupported=false, keySupported=false) {
this.cleanup();
this._mouseModifiersSupported = mouseModifiersSupported;
this._keySupported = keySupported;
this.setInput(key, modifiers);
const events = [
[this._inputNode, 'keydown', this._onModifierKeyDown.bind(this), false],
[this._inputNode, 'keyup', this._onModifierKeyUp.bind(this), false]
];
if (mouseModifiersSupported && this._mouseButton !== null) {
events.push(
[this._mouseButton, 'mousedown', this._onMouseButtonMouseDown.bind(this), false],
[this._mouseButton, 'pointerdown', this._onMouseButtonPointerDown.bind(this), false],
[this._mouseButton, 'pointerover', this._onMouseButtonPointerOver.bind(this), false],
[this._mouseButton, 'pointerout', this._onMouseButtonPointerOut.bind(this), false],
[this._mouseButton, 'pointercancel', this._onMouseButtonPointerCancel.bind(this), false],
[this._mouseButton, 'mouseup', this._onMouseButtonMouseUp.bind(this), false],
[this._mouseButton, 'contextmenu', this._onMouseButtonContextMenu.bind(this), false]
);
}
for (const args of events) {
this._eventListeners.addEventListener(...args);
}
}
setInput(key, modifiers) {
this._key = key;
this._modifiers = this._sortModifiers(modifiers);
this._updateDisplayString();
}
cleanup() {
this._eventListeners.removeAllEventListeners();
this._modifiers = [];
this._key = null;
this._mouseModifiersSupported = false;
this._keySupported = false;
this._penPointerIds.clear();
}
clearInputs() {
this._updateModifiers([], null);
}
// Private
_sortModifiers(modifiers) {
return this._hotkeyUtil.sortModifiers(modifiers);
}
_updateDisplayString() {
const displayValue = this._hotkeyUtil.getInputDisplayValue(this._key, this._modifiers);
this._inputNode.value = displayValue;
}
_getModifierKeys(e) {
const modifiers = new Set(DocumentUtil.getActiveModifiers(e));
// https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/metaKey
// https://askubuntu.com/questions/567731/why-is-shift-alt-being-mapped-to-meta
// It works with mouse events on some platforms, so try to determine if metaKey is pressed.
// This is a hack and only works when both Shift and Alt are not pressed.
if (
!modifiers.has('meta') &&
e.key === 'Meta' &&
!(
modifiers.size === 2 &&
modifiers.has('shift') &&
modifiers.has('alt')
)
) {
modifiers.add('meta');
}
return modifiers;
}
_isModifierKey(keyName) {
switch (keyName) {
case 'AltLeft':
case 'AltRight':
case 'ControlLeft':
case 'ControlRight':
case 'MetaLeft':
case 'MetaRight':
case 'ShiftLeft':
case 'ShiftRight':
case 'OSLeft':
case 'OSRight':
return true;
default:
return false;
}
}
_onModifierKeyDown(e) {
e.preventDefault();
let key = e.code;
if (key === 'Unidentified' || key === '') { key = void 0; }
if (this._keySupported) {
this._updateModifiers([...this._getModifierKeys(e)], this._isModifierKey(key) ? void 0 : key);
} else {
switch (key) {
case 'Escape':
case 'Backspace':
this.clearInputs();
break;
default:
this._addModifiers(this._getModifierKeys(e));
break;
}
}
}
_onModifierKeyUp(e) {
e.preventDefault();
}
_onMouseButtonMouseDown(e) {
e.preventDefault();
this._addModifiers(DocumentUtil.getActiveButtons(e));
}
_onMouseButtonPointerDown(e) {
if (!e.isPrimary) { return; }
let {pointerType, pointerId} = e;
// Workaround for Firefox bug not detecting certain 'touch' events as 'pen' events.
if (this._penPointerIds.has(pointerId)) { pointerType = 'pen'; }
if (
typeof this._isPointerTypeSupported !== 'function' ||
!this._isPointerTypeSupported(pointerType)
) {
return;
}
e.preventDefault();
this._addModifiers(DocumentUtil.getActiveButtons(e));
}
_onMouseButtonPointerOver(e) {
const {pointerType, pointerId} = e;
if (pointerType === 'pen') {
this._penPointerIds.add(pointerId);
}
}
_onMouseButtonPointerOut(e) {
const {pointerId} = e;
this._penPointerIds.delete(pointerId);
}
_onMouseButtonPointerCancel(e) {
this._onMouseButtonPointerOut(e);
}
_onMouseButtonMouseUp(e) {
e.preventDefault();
}
_onMouseButtonContextMenu(e) {
e.preventDefault();
}
_addModifiers(newModifiers, newKey) {
const modifiers = new Set(this._modifiers);
for (const modifier of newModifiers) {
modifiers.add(modifier);
}
this._updateModifiers([...modifiers], newKey);
}
_updateModifiers(modifiers, newKey) {
modifiers = this._sortModifiers(modifiers);
let changed = false;
if (typeof newKey !== 'undefined' && this._key !== newKey) {
this._key = newKey;
changed = true;
}
if (!this._areArraysEqual(this._modifiers, modifiers)) {
this._modifiers = modifiers;
changed = true;
}
this._updateDisplayString();
if (changed) {
this.trigger('change', {modifiers: this._modifiers, key: this._key});
}
}
_areArraysEqual(array1, array2) {
const length = array1.length;
if (length !== array2.length) { return false; }
for (let i = 0; i < length; ++i) {
if (array1[i] !== array2[i]) { return false; }
}
return true;
}
}
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