ionic-image-loader-v5
Version:
ionic-image-loader to Ionic 5
381 lines • 26.8 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: lib/ionic-image-loader.component.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import { Component, ElementRef, EventEmitter, Input, Output, Renderer2 } from '@angular/core';
import { ImageLoaderConfigService } from './services/image-loader-config.service';
import { ImageLoaderService } from './services/image-loader.service';
/** @type {?} */
const propMap = {
display: 'display',
height: 'height',
width: 'width',
backgroundSize: 'background-size',
backgroundRepeat: 'background-repeat',
};
/**
* @record
*/
export function ImageAttribute() { }
if (false) {
/** @type {?} */
ImageAttribute.prototype.element;
/** @type {?} */
ImageAttribute.prototype.value;
}
export class IonicImageLoaderComponent {
/**
* @param {?} _element
* @param {?} renderer
* @param {?} imageLoader
* @param {?} config
*/
constructor(_element, renderer, imageLoader, config) {
this._element = _element;
this.renderer = renderer;
this.imageLoader = imageLoader;
this.config = config;
/**
* Fallback URL to load when the image url fails to load or does not exist.
*/
this.fallbackUrl = this.config.fallbackUrl;
/**
* Whether to show a spinner while the image loads
*/
this.spinner = this.config.spinnerEnabled;
/**
* Whether to show the fallback image instead of a spinner while the image loads
*/
this.fallbackAsPlaceholder = this.config.fallbackAsPlaceholder;
/**
* Attributes to pass through to img tag if _useImg == true
*/
this.imgAttributes = [];
/**
* Enable/Disable caching
*/
this.cache = true;
/**
* Width of the image. This will be ignored if using useImg.
*/
this.width = this.config.width;
/**
* Height of the image. This will be ignored if using useImg.
*/
this.height = this.config.height;
/**
* Display type of the image. This will be ignored if using useImg.
*/
this.display = this.config.display;
/**
* Background size. This will be ignored if using useImg.
*/
this.backgroundSize = this.config.backgroundSize;
/**
* Background repeat. This will be ignored if using useImg.
*/
this.backgroundRepeat = this.config.backgroundRepeat;
/**
* Name of the spinner
*/
this.spinnerName = this.config.spinnerName;
/**
* Color of the spinner
*/
this.spinnerColor = this.config.spinnerColor;
/**
* Notify on image load..
*/
this.load = new EventEmitter();
/**
* Indicates if the image is still loading
*/
this.isLoading = true;
this._useImg = this.config.useImg;
}
/**
* Use <img> tag
* @param {?} val
* @return {?}
*/
set useImg(val) {
this._useImg = val !== false;
}
/**
* Convenience attribute to disable caching
* @param {?} val
* @return {?}
*/
set noCache(val) {
this.cache = val !== false;
}
/**
* @return {?}
*/
get src() {
return this._src;
}
/**
* The URL of the image to load.
* @param {?} imageUrl
* @return {?}
*/
set src(imageUrl) {
this._src = this.processImageUrl(imageUrl);
this.updateImage(this._src);
}
/**
* @return {?}
*/
ngOnInit() {
if (this.fallbackAsPlaceholder && this.fallbackUrl) {
this.setImage(this.fallbackUrl, false);
}
if (!this.src) {
// image url was not passed
// this can happen when [src] is set to a variable that turned out to be undefined
// one example could be a list of users with their profile pictures
// in this case, it would be useful to use the fallback image instead
// if fallbackUrl was used as placeholder we do not need to set it again
if (!this.fallbackAsPlaceholder && this.fallbackUrl) {
// we're not going to cache the fallback image since it should be locally saved
this.setImage(this.fallbackUrl);
}
else {
this.isLoading = false;
}
}
}
/**
* @private
* @param {?} imageUrl
* @return {?}
*/
updateImage(imageUrl) {
this.imageLoader
.getImagePath(imageUrl)
.then((/**
* @param {?} url
* @return {?}
*/
(url) => this.setImage(url)))
.catch((/**
* @param {?} error
* @return {?}
*/
(error) => this.setImage(this.fallbackUrl || imageUrl)));
}
/**
* Gets the image URL to be loaded and disables caching if necessary
* @private
* @param {?} imageUrl
* @return {?}
*/
processImageUrl(imageUrl) {
if (this.cache === false) {
// need to disable caching
if (imageUrl.indexOf('?') < 0) {
// add ? if doesn't exists
imageUrl += '?';
}
else {
imageUrl += '&';
}
// append timestamp at the end to make URL unique
imageUrl += 'cache_buster=' + Date.now();
}
return imageUrl;
}
/**
* Set the image to be displayed
* @private
* @param {?} imageUrl image src
* @param {?=} stopLoading set to true to mark the image as loaded
* @return {?}
*/
setImage(imageUrl, stopLoading = true) {
this.isLoading = !stopLoading;
if (this._useImg) {
// Using <img> tag
if (!this.element) {
// create img element if we dont have one
this.element = this.renderer.createElement('img');
this.renderer.appendChild(this._element.nativeElement, this.element);
}
// set it's src
this.renderer.setAttribute(this.element, 'src', imageUrl);
// if imgAttributes are defined, add them to our img element
this.imgAttributes.forEach((/**
* @param {?} attribute
* @return {?}
*/
(attribute) => {
this.renderer.setAttribute(this.element, attribute.element, attribute.value);
}));
if (this.fallbackUrl && !this.imageLoader.nativeAvailable) {
this.renderer.listen(this.element, 'error', (/**
* @return {?}
*/
() => this.renderer.setAttribute(this.element, 'src', this.fallbackUrl)));
}
}
else {
// Not using <img> tag
this.element = this._element.nativeElement;
for (const prop in propMap) {
if (this[prop]) {
this.renderer.setStyle(this.element, propMap[prop], this[prop]);
}
}
this.renderer.setStyle(this.element, 'background-image', `url("${imageUrl || this.fallbackUrl}")`);
}
if (stopLoading) {
this.load.emit(this);
}
}
}
IonicImageLoaderComponent.decorators = [
{ type: Component, args: [{
selector: 'img-loader',
template: `
<ion-spinner
*ngIf="spinner && isLoading && !fallbackAsPlaceholder"
[name]="spinnerName"
[color]="spinnerColor"
></ion-spinner>
<ng-content></ng-content>
`,
styles: ['ion-spinner { float: none; margin-left: auto; margin-right: auto; display: block; }']
}] }
];
/** @nocollapse */
IonicImageLoaderComponent.ctorParameters = () => [
{ type: ElementRef },
{ type: Renderer2 },
{ type: ImageLoaderService },
{ type: ImageLoaderConfigService }
];
IonicImageLoaderComponent.propDecorators = {
fallbackUrl: [{ type: Input }],
spinner: [{ type: Input }],
fallbackAsPlaceholder: [{ type: Input }],
imgAttributes: [{ type: Input }],
cache: [{ type: Input }],
width: [{ type: Input }],
height: [{ type: Input }],
display: [{ type: Input }],
backgroundSize: [{ type: Input }],
backgroundRepeat: [{ type: Input }],
spinnerName: [{ type: Input }],
spinnerColor: [{ type: Input }],
load: [{ type: Output }],
useImg: [{ type: Input }],
noCache: [{ type: Input }],
src: [{ type: Input }]
};
if (false) {
/**
* Fallback URL to load when the image url fails to load or does not exist.
* @type {?}
*/
IonicImageLoaderComponent.prototype.fallbackUrl;
/**
* Whether to show a spinner while the image loads
* @type {?}
*/
IonicImageLoaderComponent.prototype.spinner;
/**
* Whether to show the fallback image instead of a spinner while the image loads
* @type {?}
*/
IonicImageLoaderComponent.prototype.fallbackAsPlaceholder;
/**
* Attributes to pass through to img tag if _useImg == true
* @type {?}
*/
IonicImageLoaderComponent.prototype.imgAttributes;
/**
* Enable/Disable caching
* @type {?}
*/
IonicImageLoaderComponent.prototype.cache;
/**
* Width of the image. This will be ignored if using useImg.
* @type {?}
*/
IonicImageLoaderComponent.prototype.width;
/**
* Height of the image. This will be ignored if using useImg.
* @type {?}
*/
IonicImageLoaderComponent.prototype.height;
/**
* Display type of the image. This will be ignored if using useImg.
* @type {?}
*/
IonicImageLoaderComponent.prototype.display;
/**
* Background size. This will be ignored if using useImg.
* @type {?}
*/
IonicImageLoaderComponent.prototype.backgroundSize;
/**
* Background repeat. This will be ignored if using useImg.
* @type {?}
*/
IonicImageLoaderComponent.prototype.backgroundRepeat;
/**
* Name of the spinner
* @type {?}
*/
IonicImageLoaderComponent.prototype.spinnerName;
/**
* Color of the spinner
* @type {?}
*/
IonicImageLoaderComponent.prototype.spinnerColor;
/**
* Notify on image load..
* @type {?}
*/
IonicImageLoaderComponent.prototype.load;
/**
* Indicates if the image is still loading
* @type {?}
*/
IonicImageLoaderComponent.prototype.isLoading;
/** @type {?} */
IonicImageLoaderComponent.prototype.element;
/**
* @type {?}
* @private
*/
IonicImageLoaderComponent.prototype._useImg;
/**
* @type {?}
* @private
*/
IonicImageLoaderComponent.prototype._src;
/**
* @type {?}
* @private
*/
IonicImageLoaderComponent.prototype._element;
/**
* @type {?}
* @private
*/
IonicImageLoaderComponent.prototype.renderer;
/**
* @type {?}
* @private
*/
IonicImageLoaderComponent.prototype.imageLoader;
/**
* @type {?}
* @private
*/
IonicImageLoaderComponent.prototype.config;
}
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{ Component, ElementRef, EventEmitter, Input, OnInit, Output, Renderer2 } from '@angular/core';\nimport { ImageLoaderConfigService } from './services/image-loader-config.service';\nimport { ImageLoaderService } from './services/image-loader.service';\n\nconst propMap: any = {\n  display: 'display',\n  height: 'height',\n  width: 'width',\n  backgroundSize: 'background-size',\n  backgroundRepeat: 'background-repeat',\n};\n\nexport interface ImageAttribute {\n  element: string;\n  value: string;\n}\n\n@Component({\n  selector: 'img-loader',\n  template: `\n    <ion-spinner\n        *ngIf=\"spinner && isLoading && !fallbackAsPlaceholder\"\n        [name]=\"spinnerName\"\n        [color]=\"spinnerColor\"\n    ></ion-spinner>\n    <ng-content></ng-content>\n  `,\n  styles: [\n    'ion-spinner { float: none; margin-left: auto; margin-right: auto; display: block; }',\n  ],\n})\nexport class IonicImageLoaderComponent implements OnInit {\n  /**\n   * Fallback URL to load when the image url fails to load or does not exist.\n   */\n  @Input() fallbackUrl: string = this.config.fallbackUrl;\n  /**\n   * Whether to show a spinner while the image loads\n   */\n  @Input() spinner: boolean = this.config.spinnerEnabled;\n  /**\n   * Whether to show the fallback image instead of a spinner while the image loads\n   */\n\n  @Input() fallbackAsPlaceholder: boolean = this.config.fallbackAsPlaceholder;\n  /**\n   * Attributes to pass through to img tag if _useImg == true\n   */\n  @Input() imgAttributes: ImageAttribute[] = [];\n  /**\n   * Enable/Disable caching\n   */\n  @Input() cache = true;\n  /**\n   * Width of the image. This will be ignored if using useImg.\n   */\n  @Input() width: string = this.config.width;\n  /**\n   * Height of the image. This will be ignored if using useImg.\n   */\n  @Input() height: string = this.config.height;\n  /**\n   * Display type of the image. This will be ignored if using useImg.\n   */\n  @Input() display: string = this.config.display;\n  /**\n   * Background size. This will be ignored if using useImg.\n   */\n  @Input() backgroundSize: string = this.config.backgroundSize;\n  /**\n   * Background repeat. This will be ignored if using useImg.\n   */\n  @Input() backgroundRepeat: string = this.config.backgroundRepeat;\n  /**\n   * Name of the spinner\n   */\n  @Input() spinnerName: string = this.config.spinnerName;\n  /**\n   * Color of the spinner\n   */\n  @Input() spinnerColor: string = this.config.spinnerColor;\n  /**\n   * Notify on image load..\n   */\n  @Output()\n  load: EventEmitter<IonicImageLoaderComponent> = new EventEmitter<IonicImageLoaderComponent>();\n  /**\n   * Indicates if the image is still loading\n   */\n  isLoading = true;\n  element: HTMLElement;\n\n  constructor(\n      private _element: ElementRef,\n      private renderer: Renderer2,\n      private imageLoader: ImageLoaderService,\n      private config: ImageLoaderConfigService,\n  ) {\n  }\n\n  private _useImg: boolean = this.config.useImg;\n\n  /**\n   * Use <img> tag\n   */\n  @Input()\n  set useImg(val: boolean) {\n    this._useImg = val !== false;\n  }\n\n  /**\n   * Convenience attribute to disable caching\n   */\n  @Input()\n  set noCache(val: boolean) {\n    this.cache = val !== false;\n  }\n\n  private _src: string;\n\n  get src(): string {\n    return this._src;\n  }\n\n  /**\n   * The URL of the image to load.\n   */\n  @Input()\n  set src(imageUrl: string) {\n    this._src = this.processImageUrl(imageUrl);\n    this.updateImage(this._src);\n  }\n\n  ngOnInit(): void {\n    if (this.fallbackAsPlaceholder && this.fallbackUrl) {\n      this.setImage(this.fallbackUrl, false);\n    }\n\n    if (!this.src) {\n      // image url was not passed\n      // this can happen when [src] is set to a variable that turned out to be undefined\n      // one example could be a list of users with their profile pictures\n      // in this case, it would be useful to use the fallback image instead\n      // if fallbackUrl was used as placeholder we do not need to set it again\n      if (!this.fallbackAsPlaceholder && this.fallbackUrl) {\n        // we're not going to cache the fallback image since it should be locally saved\n        this.setImage(this.fallbackUrl);\n      } else {\n        this.isLoading = false;\n      }\n    }\n  }\n\n  private updateImage(imageUrl: string) {\n    this.imageLoader\n        .getImagePath(imageUrl)\n        .then((url: string) => this.setImage(url))\n        .catch((error: any) => this.setImage(this.fallbackUrl || imageUrl));\n  }\n\n  /**\n   * Gets the image URL to be loaded and disables caching if necessary\n   */\n  private processImageUrl(imageUrl: string): string {\n    if (this.cache === false) {\n      // need to disable caching\n\n      if (imageUrl.indexOf('?') < 0) {\n        // add ? if doesn't exists\n        imageUrl += '?';\n      } else {\n        imageUrl += '&';\n      }\n      // append timestamp at the end to make URL unique\n      imageUrl += 'cache_buster=' + Date.now();\n    }\n\n    return imageUrl;\n  }\n\n  /**\n   * Set the image to be displayed\n   * @param imageUrl image src\n   * @param stopLoading set to true to mark the image as loaded\n   */\n  private setImage(imageUrl: string, stopLoading: boolean = true): void {\n    this.isLoading = !stopLoading;\n\n    if (this._useImg) {\n      // Using <img> tag\n      if (!this.element) {\n        // create img element if we dont have one\n        this.element = this.renderer.createElement('img');\n        this.renderer.appendChild(this._element.nativeElement, this.element);\n      }\n\n      // set it's src\n      this.renderer.setAttribute(this.element, 'src', imageUrl);\n\n      // if imgAttributes are defined, add them to our img element\n      this.imgAttributes.forEach((attribute) => {\n        this.renderer.setAttribute(this.element, attribute.element, attribute.value);\n      });\n      if (this.fallbackUrl && !this.imageLoader.nativeAvailable) {\n        this.renderer.listen(this.element, 'error', () =>\n            this.renderer.setAttribute(this.element, 'src', this.fallbackUrl),\n        );\n      }\n    } else {\n      // Not using <img> tag\n\n      this.element = this._element.nativeElement;\n\n      for (const prop in propMap) {\n        if (this[prop]) {\n          this.renderer.setStyle(this.element, propMap[prop], this[prop]);\n        }\n      }\n      this.renderer.setStyle(\n          this.element,\n          'background-image',\n          `url(\"${imageUrl || this.fallbackUrl}\")`,\n      );\n    }\n    if (stopLoading) {\n      this.load.emit(this);\n    }\n  }\n}\n"]}