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524 lines
13 KiB
524 lines
13 KiB
import { Component, ElementRef, EventEmitter, HostBinding, HostListener, Input, OnDestroy, OnInit, Output, Renderer2, ViewEncapsulation } from '@angular/core';
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import { animate, AnimationBuilder, AnimationPlayer, style } from '@angular/animations';
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import { TreoDrawerMode, TreoDrawerPosition } from '@treo/components/drawer/drawer.types';
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import { TreoDrawerService } from '@treo/components/drawer/drawer.service';
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@Component({
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selector : 'treo-drawer',
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templateUrl : './drawer.component.html',
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styleUrls : ['./drawer.component.scss'],
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encapsulation: ViewEncapsulation.None,
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exportAs : 'treoDrawer'
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})
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export class TreoDrawerComponent implements OnInit, OnDestroy
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{
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// Name
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@Input()
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name: string;
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// Private
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private _fixed: boolean;
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private _mode: TreoDrawerMode;
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private _opened: boolean | '';
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private _overlay: HTMLElement | null;
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private _player: AnimationPlayer;
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private _position: TreoDrawerPosition;
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private _transparentOverlay: boolean | '';
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// On fixed changed
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@Output()
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readonly fixedChanged: EventEmitter<boolean>;
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// On mode changed
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@Output()
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readonly modeChanged: EventEmitter<TreoDrawerMode>;
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// On opened changed
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@Output()
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readonly openedChanged: EventEmitter<boolean | ''>;
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// On position changed
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@Output()
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readonly positionChanged: EventEmitter<TreoDrawerPosition>;
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@HostBinding('class.treo-drawer-animations-enabled')
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private _animationsEnabled: boolean;
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/**
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* Constructor
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*
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* @param {AnimationBuilder} _animationBuilder
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* @param {TreoDrawerService} _treoDrawerService
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* @param {ElementRef} _elementRef
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* @param {Renderer2} _renderer2
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*/
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constructor(
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private _animationBuilder: AnimationBuilder,
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private _treoDrawerService: TreoDrawerService,
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private _elementRef: ElementRef,
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private _renderer2: Renderer2
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)
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{
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// Set the private defaults
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this._animationsEnabled = false;
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this._overlay = null;
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// Set the defaults
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this.fixedChanged = new EventEmitter<boolean>();
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this.modeChanged = new EventEmitter<TreoDrawerMode>();
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this.openedChanged = new EventEmitter<boolean | ''>();
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this.positionChanged = new EventEmitter<TreoDrawerPosition>();
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this.fixed = false;
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this.mode = 'side';
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this.opened = false;
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this.position = 'left';
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this.transparentOverlay = false;
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}
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// -----------------------------------------------------------------------------------------------------
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// @ Accessors
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// -----------------------------------------------------------------------------------------------------
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/**
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* Setter & getter for fixed
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*
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* @param value
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*/
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@Input()
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set fixed(value: boolean)
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{
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// If the value is the same, return...
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if ( this._fixed === value )
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{
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return;
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}
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// Store the fixed value
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this._fixed = value;
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// Update the class
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if ( this.fixed )
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{
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this._renderer2.addClass(this._elementRef.nativeElement, 'treo-drawer-fixed');
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}
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else
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{
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this._renderer2.removeClass(this._elementRef.nativeElement, 'treo-drawer-fixed');
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}
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// Execute the observable
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this.fixedChanged.next(this.fixed);
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}
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get fixed(): boolean
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{
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return this._fixed;
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}
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/**
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* Setter & getter for mode
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*
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* @param value
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*/
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@Input()
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set mode(value: TreoDrawerMode)
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{
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// If the value is the same, return...
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if ( this._mode === value )
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{
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return;
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}
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// Disable the animations
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this._disableAnimations();
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// If the mode changes: 'over -> side'
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if ( this.mode === 'over' && value === 'side' )
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{
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// Hide the overlay
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this._hideOverlay();
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}
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// If the mode changes: 'side -> over'
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if ( this.mode === 'side' && value === 'over' )
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{
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// If the drawer is opened
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if ( this.opened )
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{
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// Show the overlay
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this._showOverlay();
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}
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}
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let modeClassName;
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// Remove the previous mode class
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modeClassName = 'treo-drawer-mode-' + this.mode;
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this._renderer2.removeClass(this._elementRef.nativeElement, modeClassName);
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// Store the mode
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this._mode = value;
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// Add the new mode class
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modeClassName = 'treo-drawer-mode-' + this.mode;
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this._renderer2.addClass(this._elementRef.nativeElement, modeClassName);
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// Execute the observable
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this.modeChanged.next(this.mode);
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// Enable the animations after a delay
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// The delay must be bigger than the current transition-duration
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// to make sure nothing will be animated while the mode changing
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setTimeout(() => {
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this._enableAnimations();
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}, 500);
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}
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get mode(): TreoDrawerMode
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{
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return this._mode;
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}
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/**
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* Setter & getter for opened
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*
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* @param value
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*/
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@Input()
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set opened(value: boolean | '')
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{
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// If the value is the same, return...
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if ( this._opened === value )
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{
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return;
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}
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// If the provided value is an empty string,
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// take that as a 'true'
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if ( value === '' )
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{
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value = true;
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}
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// Set the opened value
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this._opened = value;
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// If the drawer opened, and the mode
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// is 'over', show the overlay
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if ( this.mode === 'over' )
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{
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if ( this._opened )
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{
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this._showOverlay();
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}
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else
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{
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this._hideOverlay();
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}
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}
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// Update opened classes
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if ( this.opened )
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{
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this._renderer2.setStyle(this._elementRef.nativeElement, 'visibility', 'visible');
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this._renderer2.addClass(this._elementRef.nativeElement, 'treo-drawer-opened');
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}
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else
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{
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this._renderer2.setStyle(this._elementRef.nativeElement, 'visibility', 'hidden');
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this._renderer2.removeClass(this._elementRef.nativeElement, 'treo-drawer-opened');
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}
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// Execute the observable
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this.openedChanged.next(this.opened);
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}
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get opened(): boolean | ''
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{
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return this._opened;
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}
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/**
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* Setter & getter for position
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*
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* @param value
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*/
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@Input()
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set position(value: TreoDrawerPosition)
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{
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// If the value is the same, return...
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if ( this._position === value )
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{
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return;
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}
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let positionClassName;
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// Remove the previous position class
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positionClassName = 'treo-drawer-position-' + this.position;
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this._renderer2.removeClass(this._elementRef.nativeElement, positionClassName);
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// Store the position
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this._position = value;
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// Add the new position class
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positionClassName = 'treo-drawer-position-' + this.position;
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this._renderer2.addClass(this._elementRef.nativeElement, positionClassName);
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// Execute the observable
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this.positionChanged.next(this.position);
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}
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get position(): TreoDrawerPosition
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{
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return this._position;
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}
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/**
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* Setter & getter for transparent overlay
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*
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* @param value
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*/
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@Input()
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set transparentOverlay(value: boolean | '')
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{
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// If the value is the same, return...
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if ( this._opened === value )
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{
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return;
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}
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// If the provided value is an empty string,
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// take that as a 'true' and set the opened value
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if ( value === '' )
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{
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// Set the opened value
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this._transparentOverlay = true;
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}
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else
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{
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// Set the transparent overlay value
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this._transparentOverlay = value;
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}
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}
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get transparentOverlay(): boolean | ''
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{
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return this._transparentOverlay;
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}
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// -----------------------------------------------------------------------------------------------------
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// @ Lifecycle hooks
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// -----------------------------------------------------------------------------------------------------
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/**
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* On init
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*/
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ngOnInit(): void
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{
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// Register the drawer
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this._treoDrawerService.registerComponent(this.name, this);
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}
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/**
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* On destroy
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*/
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ngOnDestroy(): void
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{
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// Deregister the drawer from the registry
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this._treoDrawerService.deregisterComponent(this.name);
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}
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// -----------------------------------------------------------------------------------------------------
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// @ Private methods
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// -----------------------------------------------------------------------------------------------------
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/**
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* Enable the animations
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*
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* @private
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*/
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private _enableAnimations(): void
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{
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// If the animations are already enabled, return...
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if ( this._animationsEnabled )
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{
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return;
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}
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// Enable the animations
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this._animationsEnabled = true;
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}
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/**
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* Disable the animations
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*
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* @private
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*/
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private _disableAnimations(): void
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{
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// If the animations are already disabled, return...
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if ( !this._animationsEnabled )
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{
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return;
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}
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// Disable the animations
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this._animationsEnabled = false;
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}
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/**
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* Show the backdrop
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*
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* @private
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*/
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private _showOverlay(): void
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{
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// Create the backdrop element
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this._overlay = this._renderer2.createElement('div');
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// Add a class to the backdrop element
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this._overlay.classList.add('treo-drawer-overlay');
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// Add a class depending on the fixed option
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if ( this.fixed )
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{
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this._overlay.classList.add('treo-drawer-overlay-fixed');
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}
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// Add a class depending on the transparentOverlay option
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if ( this.transparentOverlay )
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{
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this._overlay.classList.add('treo-drawer-overlay-transparent');
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}
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// Append the backdrop to the parent of the drawer
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this._renderer2.appendChild(this._elementRef.nativeElement.parentElement, this._overlay);
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// Create the enter animation and attach it to the player
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this._player =
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this._animationBuilder
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.build([
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animate('300ms cubic-bezier(0.25, 0.8, 0.25, 1)', style({opacity: 1}))
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]).create(this._overlay);
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// Play the animation
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this._player.play();
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// Add an event listener to the overlay
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this._overlay.addEventListener('click', () => {
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this.close();
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});
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}
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/**
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* Hide the backdrop
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*
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* @private
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*/
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private _hideOverlay(): void
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{
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if ( !this._overlay )
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{
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return;
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}
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// Create the leave animation and attach it to the player
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this._player =
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this._animationBuilder
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.build([
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animate('300ms cubic-bezier(0.25, 0.8, 0.25, 1)', style({opacity: 0}))
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]).create(this._overlay);
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// Play the animation
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this._player.play();
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// Once the animation is done...
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this._player.onDone(() => {
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// If the backdrop still exists...
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if ( this._overlay )
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{
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// Remove the backdrop
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this._overlay.parentNode.removeChild(this._overlay);
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this._overlay = null;
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}
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});
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}
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/**
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* On mouseenter
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*
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* @private
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*/
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@HostListener('mouseenter')
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private _onMouseenter(): void
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{
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// Enable the animations
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this._enableAnimations();
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// Add a class
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this._renderer2.addClass(this._elementRef.nativeElement, 'treo-drawer-hover');
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}
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/**
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* On mouseleave
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*
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* @private
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*/
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@HostListener('mouseleave')
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private _onMouseleave(): void
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{
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// Enable the animations
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this._enableAnimations();
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// Remove the class
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this._renderer2.removeClass(this._elementRef.nativeElement, 'treo-drawer-hover');
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}
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// -----------------------------------------------------------------------------------------------------
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// @ Public methods
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// -----------------------------------------------------------------------------------------------------
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/**
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* Open the drawer
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*/
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open(): void
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{
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// Enable the animations
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this._enableAnimations();
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// Open
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this.opened = true;
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}
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/**
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* Close the drawer
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*/
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close(): void
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{
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// Enable the animations
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this._enableAnimations();
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// Close
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this.opened = false;
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}
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/**
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* Toggle the opened status
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*/
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toggle(): void
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{
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// Toggle
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if ( this.opened )
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{
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this.close();
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}
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else
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{
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this.open();
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}
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}
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}
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