@21epub/epub-thirdparty
Version:
epub-thirdparty
73 lines (72 loc) • 3.29 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { GlobalMouseMoveMonitor, standardMouseMoveMerger } from '../../globalMouseMoveMonitor.js';
import { Widget } from '../widget.js';
import { IntervalTimer, TimeoutTimer } from '../../../common/async.js';
/**
* The arrow image size.
*/
export const ARROW_IMG_SIZE = 11;
export class ScrollbarArrow extends Widget {
constructor(opts) {
super();
this._onActivate = opts.onActivate;
this.bgDomNode = document.createElement('div');
this.bgDomNode.className = 'arrow-background';
this.bgDomNode.style.position = 'absolute';
this.bgDomNode.style.width = opts.bgWidth + 'px';
this.bgDomNode.style.height = opts.bgHeight + 'px';
if (typeof opts.top !== 'undefined') {
this.bgDomNode.style.top = '0px';
}
if (typeof opts.left !== 'undefined') {
this.bgDomNode.style.left = '0px';
}
if (typeof opts.bottom !== 'undefined') {
this.bgDomNode.style.bottom = '0px';
}
if (typeof opts.right !== 'undefined') {
this.bgDomNode.style.right = '0px';
}
this.domNode = document.createElement('div');
this.domNode.className = opts.className;
this.domNode.classList.add(...opts.icon.classNamesArray);
this.domNode.style.position = 'absolute';
this.domNode.style.width = ARROW_IMG_SIZE + 'px';
this.domNode.style.height = ARROW_IMG_SIZE + 'px';
if (typeof opts.top !== 'undefined') {
this.domNode.style.top = opts.top + 'px';
}
if (typeof opts.left !== 'undefined') {
this.domNode.style.left = opts.left + 'px';
}
if (typeof opts.bottom !== 'undefined') {
this.domNode.style.bottom = opts.bottom + 'px';
}
if (typeof opts.right !== 'undefined') {
this.domNode.style.right = opts.right + 'px';
}
this._mouseMoveMonitor = this._register(new GlobalMouseMoveMonitor());
this.onmousedown(this.bgDomNode, (e) => this._arrowMouseDown(e));
this.onmousedown(this.domNode, (e) => this._arrowMouseDown(e));
this._mousedownRepeatTimer = this._register(new IntervalTimer());
this._mousedownScheduleRepeatTimer = this._register(new TimeoutTimer());
}
_arrowMouseDown(e) {
const scheduleRepeater = () => {
this._mousedownRepeatTimer.cancelAndSet(() => this._onActivate(), 1000 / 24);
};
this._onActivate();
this._mousedownRepeatTimer.cancel();
this._mousedownScheduleRepeatTimer.cancelAndSet(scheduleRepeater, 200);
this._mouseMoveMonitor.startMonitoring(e.target, e.buttons, standardMouseMoveMerger, (mouseMoveData) => {
/* Intentional empty */
}, () => {
this._mousedownRepeatTimer.cancel();
this._mousedownScheduleRepeatTimer.cancel();
});
e.preventDefault();
}
}