1 | import PerfectScrollbar from 'perfect-scrollbar';
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2 | import ResizeObserver from 'resize-observer-polyfill';
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3 | import { Subject, fromEvent } from 'rxjs';
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4 | import { auditTime, takeUntil } from 'rxjs/operators';
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5 | import { PLATFORM_ID } from '@angular/core';
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6 | import { isPlatformBrowser } from '@angular/common';
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7 | import { NgZone, Inject, Optional, ElementRef, Directive, Input, Output, EventEmitter, KeyValueDiffers } from '@angular/core';
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8 | import { Geometry, Position } from './perfect-scrollbar.interfaces';
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9 | import { PERFECT_SCROLLBAR_CONFIG, PerfectScrollbarConfig, PerfectScrollbarEvents } from './perfect-scrollbar.interfaces';
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10 | export class PerfectScrollbarDirective {
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11 | constructor(zone, differs, elementRef, platformId, defaults) {
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12 | this.zone = zone;
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13 | this.differs = differs;
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14 | this.elementRef = elementRef;
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15 | this.platformId = platformId;
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16 | this.defaults = defaults;
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17 | this.instance = null;
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18 | this.ro = null;
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19 | this.timeout = null;
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20 | this.animation = null;
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21 | this.configDiff = null;
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22 | this.ngDestroy = new Subject();
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23 | this.disabled = false;
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24 | this.psScrollY = new EventEmitter();
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25 | this.psScrollX = new EventEmitter();
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26 | this.psScrollUp = new EventEmitter();
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27 | this.psScrollDown = new EventEmitter();
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28 | this.psScrollLeft = new EventEmitter();
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29 | this.psScrollRight = new EventEmitter();
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30 | this.psYReachEnd = new EventEmitter();
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31 | this.psYReachStart = new EventEmitter();
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32 | this.psXReachEnd = new EventEmitter();
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33 | this.psXReachStart = new EventEmitter();
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34 | }
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35 | ngOnInit() {
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36 | if (!this.disabled && isPlatformBrowser(this.platformId)) {
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37 | const config = new PerfectScrollbarConfig(this.defaults);
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38 | config.assign(this.config); // Custom configuration
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39 | this.zone.runOutsideAngular(() => {
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40 | this.instance = new PerfectScrollbar(this.elementRef.nativeElement, config);
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41 | });
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42 | if (!this.configDiff) {
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43 | this.configDiff = this.differs.find(this.config || {}).create();
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44 | this.configDiff.diff(this.config || {});
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45 | }
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46 | this.zone.runOutsideAngular(() => {
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47 | this.ro = new ResizeObserver(() => {
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48 | this.update();
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49 | });
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50 | if (this.elementRef.nativeElement.children[0]) {
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51 | this.ro.observe(this.elementRef.nativeElement.children[0]);
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52 | }
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53 | this.ro.observe(this.elementRef.nativeElement);
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54 | });
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55 | this.zone.runOutsideAngular(() => {
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56 | PerfectScrollbarEvents.forEach((eventName) => {
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57 | const eventType = eventName.replace(/([A-Z])/g, (c) => `-${c.toLowerCase()}`);
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58 | fromEvent(this.elementRef.nativeElement, eventType)
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59 | .pipe(auditTime(20), takeUntil(this.ngDestroy))
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60 | .subscribe((event) => {
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61 | this[eventName].emit(event);
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62 | });
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63 | });
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64 | });
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65 | }
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66 | }
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67 | ngOnDestroy() {
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68 | if (isPlatformBrowser(this.platformId)) {
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69 | this.ngDestroy.next();
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70 | this.ngDestroy.complete();
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71 | if (this.ro) {
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72 | this.ro.disconnect();
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73 | }
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74 | if (this.timeout && typeof window !== 'undefined') {
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75 | window.clearTimeout(this.timeout);
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76 | }
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77 | this.zone.runOutsideAngular(() => {
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78 | if (this.instance) {
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79 | this.instance.destroy();
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80 | }
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81 | });
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82 | this.instance = null;
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83 | }
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84 | }
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85 | ngDoCheck() {
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86 | if (!this.disabled && this.configDiff && isPlatformBrowser(this.platformId)) {
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87 | const changes = this.configDiff.diff(this.config || {});
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88 | if (changes) {
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89 | this.ngOnDestroy();
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90 | this.ngOnInit();
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91 | }
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92 | }
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93 | }
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94 | ngOnChanges(changes) {
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95 | if (changes['disabled'] && !changes['disabled'].isFirstChange() && isPlatformBrowser(this.platformId)) {
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96 | if (changes['disabled'].currentValue !== changes['disabled'].previousValue) {
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97 | if (changes['disabled'].currentValue === true) {
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98 | this.ngOnDestroy();
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99 | }
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100 | else if (changes['disabled'].currentValue === false) {
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101 | this.ngOnInit();
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102 | }
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103 | }
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104 | }
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105 | }
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106 | ps() {
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107 | return this.instance;
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108 | }
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109 | update() {
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110 | if (typeof window !== 'undefined') {
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111 | if (this.timeout) {
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112 | window.clearTimeout(this.timeout);
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113 | }
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114 | this.timeout = window.setTimeout(() => {
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115 | if (!this.disabled && this.configDiff) {
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116 | try {
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117 | this.zone.runOutsideAngular(() => {
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118 | if (this.instance) {
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119 | this.instance.update();
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120 | }
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121 | });
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122 | }
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123 | catch (error) {
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124 | // Update can be finished after destroy so catch errors
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125 | }
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126 | }
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127 | }, 0);
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128 | }
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129 | }
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130 | geometry(prefix = 'scroll') {
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131 | return new Geometry(this.elementRef.nativeElement[prefix + 'Left'], this.elementRef.nativeElement[prefix + 'Top'], this.elementRef.nativeElement[prefix + 'Width'], this.elementRef.nativeElement[prefix + 'Height']);
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132 | }
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133 | position(absolute = false) {
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134 | if (!absolute && this.instance) {
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135 | return new Position(this.instance.reach.x || 0, this.instance.reach.y || 0);
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136 | }
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137 | else {
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138 | return new Position(this.elementRef.nativeElement.scrollLeft, this.elementRef.nativeElement.scrollTop);
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139 | }
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140 | }
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141 | scrollable(direction = 'any') {
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142 | const element = this.elementRef.nativeElement;
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143 | if (direction === 'any') {
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144 | return element.classList.contains('ps--active-x') ||
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145 | element.classList.contains('ps--active-y');
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146 | }
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147 | else if (direction === 'both') {
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148 | return element.classList.contains('ps--active-x') &&
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149 | element.classList.contains('ps--active-y');
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150 | }
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151 | else {
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152 | return element.classList.contains('ps--active-' + direction);
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153 | }
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154 | }
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155 | scrollTo(x, y, speed) {
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156 | if (!this.disabled) {
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157 | if (y == null && speed == null) {
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158 | this.animateScrolling('scrollTop', x, speed);
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159 | }
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160 | else {
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161 | if (x != null) {
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162 | this.animateScrolling('scrollLeft', x, speed);
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163 | }
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164 | if (y != null) {
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165 | this.animateScrolling('scrollTop', y, speed);
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166 | }
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167 | }
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168 | }
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169 | }
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170 | scrollToX(x, speed) {
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171 | this.animateScrolling('scrollLeft', x, speed);
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172 | }
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173 | scrollToY(y, speed) {
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174 | this.animateScrolling('scrollTop', y, speed);
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175 | }
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176 | scrollToTop(offset, speed) {
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177 | this.animateScrolling('scrollTop', (offset || 0), speed);
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178 | }
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179 | scrollToLeft(offset, speed) {
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180 | this.animateScrolling('scrollLeft', (offset || 0), speed);
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181 | }
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182 | scrollToRight(offset, speed) {
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183 | const left = this.elementRef.nativeElement.scrollWidth -
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184 | this.elementRef.nativeElement.clientWidth;
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185 | this.animateScrolling('scrollLeft', left - (offset || 0), speed);
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186 | }
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187 | scrollToBottom(offset, speed) {
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188 | const top = this.elementRef.nativeElement.scrollHeight -
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189 | this.elementRef.nativeElement.clientHeight;
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190 | this.animateScrolling('scrollTop', top - (offset || 0), speed);
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191 | }
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192 | scrollToElement(element, offset, speed) {
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193 | if (typeof element === 'string') {
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194 | element = this.elementRef.nativeElement.querySelector(element);
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195 | }
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196 | if (element) {
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197 | const elementPos = element.getBoundingClientRect();
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198 | const scrollerPos = this.elementRef.nativeElement.getBoundingClientRect();
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199 | if (this.elementRef.nativeElement.classList.contains('ps--active-x')) {
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200 | const currentPos = this.elementRef.nativeElement['scrollLeft'];
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201 | const position = elementPos.left - scrollerPos.left + currentPos;
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202 | this.animateScrolling('scrollLeft', position + (offset || 0), speed);
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203 | }
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204 | if (this.elementRef.nativeElement.classList.contains('ps--active-y')) {
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205 | const currentPos = this.elementRef.nativeElement['scrollTop'];
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206 | const position = elementPos.top - scrollerPos.top + currentPos;
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207 | this.animateScrolling('scrollTop', position + (offset || 0), speed);
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208 | }
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209 | }
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210 | }
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211 | animateScrolling(target, value, speed) {
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212 | if (this.animation) {
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213 | window.cancelAnimationFrame(this.animation);
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214 | this.animation = null;
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215 | }
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216 | if (!speed || typeof window === 'undefined') {
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217 | this.elementRef.nativeElement[target] = value;
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218 | }
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219 | else if (value !== this.elementRef.nativeElement[target]) {
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220 | let newValue = 0;
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221 | let scrollCount = 0;
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222 | let oldTimestamp = performance.now();
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223 | let oldValue = this.elementRef.nativeElement[target];
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224 | const cosParameter = (oldValue - value) / 2;
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225 | const step = (newTimestamp) => {
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226 | scrollCount += Math.PI / (speed / (newTimestamp - oldTimestamp));
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227 | newValue = Math.round(value + cosParameter + cosParameter * Math.cos(scrollCount));
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228 | // Only continue animation if scroll position has not changed
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229 | if (this.elementRef.nativeElement[target] === oldValue) {
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230 | if (scrollCount >= Math.PI) {
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231 | this.animateScrolling(target, value, 0);
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232 | }
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233 | else {
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234 | this.elementRef.nativeElement[target] = newValue;
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235 | // On a zoomed out page the resulting offset may differ
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236 | oldValue = this.elementRef.nativeElement[target];
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237 | oldTimestamp = newTimestamp;
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238 | this.animation = window.requestAnimationFrame(step);
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239 | }
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240 | }
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241 | };
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242 | window.requestAnimationFrame(step);
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243 | }
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244 | }
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245 | }
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246 | PerfectScrollbarDirective.decorators = [
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247 | { type: Directive, args: [{
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248 | selector: '[perfectScrollbar]',
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249 | exportAs: 'ngxPerfectScrollbar'
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250 | },] }
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251 | ];
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252 | PerfectScrollbarDirective.ctorParameters = () => [
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253 | { type: NgZone },
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254 | { type: KeyValueDiffers },
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255 | { type: ElementRef },
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256 | { type: Object, decorators: [{ type: Inject, args: [PLATFORM_ID,] }] },
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257 | { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [PERFECT_SCROLLBAR_CONFIG,] }] }
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258 | ];
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259 | PerfectScrollbarDirective.propDecorators = {
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260 | disabled: [{ type: Input }],
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261 | config: [{ type: Input, args: ['perfectScrollbar',] }],
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262 | psScrollY: [{ type: Output }],
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263 | psScrollX: [{ type: Output }],
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264 | psScrollUp: [{ type: Output }],
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265 | psScrollDown: [{ type: Output }],
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266 | psScrollLeft: [{ type: Output }],
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267 | psScrollRight: [{ type: Output }],
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268 | psYReachEnd: [{ type: Output }],
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269 | psYReachStart: [{ type: Output }],
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270 | psXReachEnd: [{ type: Output }],
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271 | psXReachStart: [{ type: Output }]
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272 | };
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273 | //# 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PerfectScrollbar from 'perfect-scrollbar';\n\nimport ResizeObserver from 'resize-observer-polyfill';\n\nimport { Subject, fromEvent } from 'rxjs';\nimport { auditTime, takeUntil } from 'rxjs/operators';\n\nimport { PLATFORM_ID } from '@angular/core';\nimport { isPlatformBrowser } from '@angular/common';\nimport { NgZone, Inject, Optional, ElementRef, Directive,\n  OnInit, DoCheck, OnChanges, OnDestroy, Input, Output, EventEmitter,\n  SimpleChanges, KeyValueDiffer, KeyValueDiffers } from '@angular/core';\n\nimport { Geometry, Position } from './perfect-scrollbar.interfaces';\n\nimport { PERFECT_SCROLLBAR_CONFIG, PerfectScrollbarConfig, PerfectScrollbarConfigInterface,\n  PerfectScrollbarEvent, PerfectScrollbarEvents } from './perfect-scrollbar.interfaces';\n\n@Directive({\n  selector: '[perfectScrollbar]',\n  exportAs: 'ngxPerfectScrollbar'\n})\nexport class PerfectScrollbarDirective implements OnInit, OnDestroy, DoCheck, OnChanges {\n  private instance: PerfectScrollbar | null = null;\n\n  private ro: ResizeObserver | null = null;\n\n  private timeout: number | null = null;\n  private animation: number | null = null;\n\n  private configDiff: KeyValueDiffer<string, any> | null = null;\n\n  private readonly ngDestroy: Subject<void> = new Subject();\n\n  @Input() disabled: boolean = false;\n\n  @Input('perfectScrollbar') config?: PerfectScrollbarConfigInterface;\n\n  @Output() psScrollY: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psScrollX: EventEmitter<any> = new EventEmitter<any>();\n\n  @Output() psScrollUp: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psScrollDown: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psScrollLeft: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psScrollRight: EventEmitter<any> = new EventEmitter<any>();\n\n  @Output() psYReachEnd: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psYReachStart: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psXReachEnd: EventEmitter<any> = new EventEmitter<any>();\n  @Output() psXReachStart: EventEmitter<any> = new EventEmitter<any>();\n\n  constructor(private zone: NgZone, private differs: KeyValueDiffers,\n    public elementRef: ElementRef, @Inject(PLATFORM_ID) private platformId: Object,\n    @Optional() @Inject(PERFECT_SCROLLBAR_CONFIG) private defaults: PerfectScrollbarConfigInterface) {}\n\n  ngOnInit(): void {\n    if (!this.disabled && isPlatformBrowser(this.platformId)) {\n      const config = new PerfectScrollbarConfig(this.defaults);\n\n      config.assign(this.config); // Custom configuration\n\n      this.zone.runOutsideAngular(() => {\n        this.instance = new PerfectScrollbar(this.elementRef.nativeElement, config);\n      });\n\n      if (!this.configDiff) {\n        this.configDiff = this.differs.find(this.config || {}).create();\n\n        this.configDiff.diff(this.config || {});\n      }\n\n      this.zone.runOutsideAngular(() => {\n        this.ro = new ResizeObserver(() => {\n          this.update();\n        });\n\n        if (this.elementRef.nativeElement.children[0]) {\n          this.ro.observe(this.elementRef.nativeElement.children[0]);\n        }\n\n        this.ro.observe(this.elementRef.nativeElement);\n      });\n\n      this.zone.runOutsideAngular(() => {\n        PerfectScrollbarEvents.forEach((eventName: PerfectScrollbarEvent) => {\n          const eventType = eventName.replace(/([A-Z])/g, (c) => `-${c.toLowerCase()}`);\n\n          fromEvent<Event>(this.elementRef.nativeElement, eventType)\n            .pipe(\n              auditTime(20),\n              takeUntil(this.ngDestroy)\n            )\n            .subscribe((event: Event) => {\n              this[eventName].emit(event);\n            });\n        });\n      });\n    }\n  }\n\n  ngOnDestroy(): void {\n    if (isPlatformBrowser(this.platformId)) {\n      this.ngDestroy.next();\n      this.ngDestroy.complete();\n\n      if (this.ro) {\n        this.ro.disconnect();\n      }\n\n      if (this.timeout && typeof window !== 'undefined') {\n        window.clearTimeout(this.timeout);\n      }\n\n      this.zone.runOutsideAngular(() => {\n        if (this.instance) {\n          this.instance.destroy();\n        }\n      });\n\n      this.instance = null;\n    }\n  }\n\n  ngDoCheck(): void {\n    if (!this.disabled && this.configDiff && isPlatformBrowser(this.platformId)) {\n      const changes = this.configDiff.diff(this.config || {});\n\n      if (changes) {\n        this.ngOnDestroy();\n\n        this.ngOnInit();\n      }\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    if (changes['disabled'] && !changes['disabled'].isFirstChange() && isPlatformBrowser(this.platformId)) {\n      if (changes['disabled'].currentValue !== changes['disabled'].previousValue) {\n        if (changes['disabled'].currentValue === true) {\n         this.ngOnDestroy();\n        } else if (changes['disabled'].currentValue === false) {\n          this.ngOnInit();\n        }\n      }\n    }\n  }\n\n  public ps(): PerfectScrollbar | null {\n    return this.instance;\n  }\n\n  public update(): void {\n    if (typeof window !== 'undefined') {\n      if (this.timeout) {\n        window.clearTimeout(this.timeout);\n      }\n\n      this.timeout = window.setTimeout(() => {\n        if (!this.disabled && this.configDiff) {\n          try {\n            this.zone.runOutsideAngular(() => {\n              if (this.instance) {\n                this.instance.update();\n              }\n            });\n          } catch (error) {\n            // Update can be finished after destroy so catch errors\n          }\n        }\n      }, 0);\n    }\n  }\n\n  public geometry(prefix: string = 'scroll'): Geometry {\n    return new Geometry(\n      this.elementRef.nativeElement[prefix + 'Left'],\n      this.elementRef.nativeElement[prefix + 'Top'],\n      this.elementRef.nativeElement[prefix + 'Width'],\n      this.elementRef.nativeElement[prefix + 'Height']\n    );\n  }\n\n  public position(absolute: boolean = false): Position {\n    if (!absolute && this.instance) {\n      return new Position(\n        this.instance.reach.x || 0,\n        this.instance.reach.y || 0\n      );\n    } else {\n      return new Position(\n        this.elementRef.nativeElement.scrollLeft,\n        this.elementRef.nativeElement.scrollTop\n      );\n    }\n  }\n\n  public scrollable(direction: string = 'any'): boolean {\n    const element = this.elementRef.nativeElement;\n\n    if (direction === 'any') {\n      return element.classList.contains('ps--active-x') ||\n        element.classList.contains('ps--active-y');\n    } else if (direction === 'both') {\n      return element.classList.contains('ps--active-x') &&\n        element.classList.contains('ps--active-y');\n    } else {\n      return element.classList.contains('ps--active-' + direction);\n    }\n  }\n\n  public scrollTo(x: number, y?: number, speed?: number): void {\n    if (!this.disabled) {\n      if (y == null && speed == null) {\n        this.animateScrolling('scrollTop', x, speed);\n      } else {\n        if (x != null) {\n          this.animateScrolling('scrollLeft', x, speed);\n        }\n\n        if (y != null) {\n          this.animateScrolling('scrollTop', y, speed);\n        }\n      }\n    }\n  }\n\n  public scrollToX(x: number, speed?: number): void {\n    this.animateScrolling('scrollLeft', x, speed);\n  }\n\n  public scrollToY(y: number, speed?: number): void {\n    this.animateScrolling('scrollTop', y, speed);\n  }\n\n  public scrollToTop(offset?: number, speed?: number): void {\n    this.animateScrolling('scrollTop', (offset || 0), speed);\n  }\n\n  public scrollToLeft(offset?: number, speed?: number): void {\n    this.animateScrolling('scrollLeft', (offset || 0), speed);\n  }\n\n  public scrollToRight(offset?: number, speed?: number): void {\n    const left = this.elementRef.nativeElement.scrollWidth -\n      this.elementRef.nativeElement.clientWidth;\n\n    this.animateScrolling('scrollLeft', left - (offset || 0), speed);\n  }\n\n  public scrollToBottom(offset?: number, speed?: number): void {\n    const top = this.elementRef.nativeElement.scrollHeight -\n      this.elementRef.nativeElement.clientHeight;\n\n    this.animateScrolling('scrollTop', top - (offset || 0), speed);\n  }\n\n  public scrollToElement(element: HTMLElement | string, offset?: number, speed?: number): void {\n    if (typeof element === 'string') {\n      element = this.elementRef.nativeElement.querySelector(element) as HTMLElement;\n    }\n\n    if (element) {\n      const elementPos = element.getBoundingClientRect();\n\n      const scrollerPos = this.elementRef.nativeElement.getBoundingClientRect();\n\n      if (this.elementRef.nativeElement.classList.contains('ps--active-x')) {\n        const currentPos = this.elementRef.nativeElement['scrollLeft'];\n\n        const position = elementPos.left - scrollerPos.left + currentPos;\n\n        this.animateScrolling('scrollLeft', position + (offset || 0), speed);\n      }\n\n      if (this.elementRef.nativeElement.classList.contains('ps--active-y')) {\n        const currentPos = this.elementRef.nativeElement['scrollTop'];\n\n        const position = elementPos.top - scrollerPos.top + currentPos;\n\n        this.animateScrolling('scrollTop', position + (offset || 0), speed);\n      }\n    }\n  }\n\n  private animateScrolling(target: string, value: number, speed?: number): void {\n    if (this.animation) {\n      window.cancelAnimationFrame(this.animation);\n\n      this.animation = null;\n    }\n\n    if (!speed || typeof window === 'undefined') {\n      this.elementRef.nativeElement[target] = value;\n    } else if (value !== this.elementRef.nativeElement[target]) {\n      let newValue = 0;\n      let scrollCount = 0;\n\n      let oldTimestamp = performance.now();\n      let oldValue = this.elementRef.nativeElement[target];\n\n      const cosParameter = (oldValue - value) / 2;\n\n      const step = (newTimestamp: number) => {\n        scrollCount += Math.PI / (speed / (newTimestamp - oldTimestamp));\n\n        newValue = Math.round(value + cosParameter + cosParameter * Math.cos(scrollCount));\n\n        // Only continue animation if scroll position has not changed\n        if (this.elementRef.nativeElement[target] === oldValue) {\n          if (scrollCount >= Math.PI) {\n            this.animateScrolling(target, value, 0);\n          } else {\n            this.elementRef.nativeElement[target] = newValue;\n\n            // On a zoomed out page the resulting offset may differ\n            oldValue = this.elementRef.nativeElement[target];\n\n            oldTimestamp = newTimestamp;\n\n            this.animation = window.requestAnimationFrame(step);\n          }\n        }\n      };\n\n      window.requestAnimationFrame(step);\n    }\n  }\n}\n"]} |
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