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MOBILE-3320 core: Add format text placeholder when loading

main
Pau Ferrer Ocaña 2021-06-04 12:25:30 +02:00
parent 530ac1a109
commit 64dd36a5e2
5 changed files with 104 additions and 30 deletions
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32
src/core/directives/format-text.ts
View File

@ -72,6 +72,7 @@ export class CoreFormatTextDirective implements OnChanges {
@Input() wsNotFiltered?: boolean | string; // If true it means the WS didn't filter the text for some reason.
@Input() captureLinks?: boolean; // Whether links should tried to be opened inside the app. Defaults to true.
@Input() openLinksInApp?: boolean; // Whether links should be opened in InAppBrowser.
@Input() hideIfEmpty = false; // If true, the tag will contain nothing if text is empty.
/**
* Max height in pixels to render the content box. It should be 50 at least to make sense.
@ -86,6 +87,8 @@ export class CoreFormatTextDirective implements OnChanges {
protected element: HTMLElement;
protected showMoreDisplayed = false;
protected loadingChangedListener?: CoreEventObserver;
protected emptyText = '';
protected contentSpan: HTMLElement;
constructor(
element: ElementRef,
@ -93,9 +96,20 @@ export class CoreFormatTextDirective implements OnChanges {
protected viewContainerRef: ViewContainerRef,
protected sanitizer: DomSanitizer,
) {
this.element = element.nativeElement;
this.element.classList.add('opacity-hide'); // Hide contents until they're treated.
this.element.classList.add('core-format-text-loading'); // Hide contents until they're treated.
const placeholder = document.createElement('span');
placeholder.classList.add('core-format-text-loader');
this.element.appendChild(placeholder);
this.contentSpan = document.createElement('span');
this.contentSpan.classList.add('core-format-text-content');
this.element.appendChild(this.contentSpan);
this.emptyText = this.hideIfEmpty ? '' : ' ';
this.contentSpan.innerHTML = this.emptyText;
this.afterRender = new EventEmitter<void>();
this.element.addEventListener('click', this.elementClicked.bind(this));
@ -183,7 +197,7 @@ export class CoreFormatTextDirective implements OnChanges {
* Add magnifying glass icons to view adapted images at full size.
*/
addMagnifyingGlasses(): void {
const imgs = Array.from(this.element.querySelectorAll('.core-adapted-img-container > img'));
const imgs = Array.from(this.contentSpan.querySelectorAll('.core-adapted-img-container > img'));
if (!imgs.length) {
return;
}
@ -339,7 +353,7 @@ export class CoreFormatTextDirective implements OnChanges {
*/
protected finishRender(): void {
// Show the element again.
this.element.classList.remove('opacity-hide');
this.element.classList.remove('core-format-text-loading');
// Emit the afterRender output.
this.afterRender.emit();
}
@ -349,7 +363,7 @@ export class CoreFormatTextDirective implements OnChanges {
*/
protected async formatAndRenderContents(): Promise<void> {
if (!this.text) {
this.element.innerHTML = ''; // Remove current contents.
this.contentSpan.innerHTML = this.emptyText; // Remove current contents.
this.finishRender();
return;
@ -370,12 +384,12 @@ export class CoreFormatTextDirective implements OnChanges {
// Disable media adapt to correctly calculate the height.
this.element.classList.add('core-disable-media-adapt');
this.element.innerHTML = ''; // Remove current contents.
this.contentSpan.innerHTML = ''; // Remove current contents.
if (this.maxHeight && result.div.innerHTML != '' &&
(this.fullOnClick || (window.innerWidth < 576 || window.innerHeight < 576))) { // Don't collapse in big screens.
// Move the children to the current element to be able to calculate the height.
CoreDomUtils.moveChildren(result.div, this.element);
CoreDomUtils.moveChildren(result.div, this.contentSpan);
// Calculate the height now.
this.calculateHeight();
@ -396,7 +410,7 @@ export class CoreFormatTextDirective implements OnChanges {
});
}
} else {
CoreDomUtils.moveChildren(result.div, this.element);
CoreDomUtils.moveChildren(result.div, this.contentSpan);
// Add magnifying glasses to images.
this.addMagnifyingGlasses();
@ -405,7 +419,7 @@ export class CoreFormatTextDirective implements OnChanges {
if (result.options.filter) {
// Let filters handle HTML. We do it here because we don't want them to block the render of the text.
CoreFilterDelegate.handleHtml(
this.element,
this.contentSpan,
result.filters,
this.viewContainerRef,
result.options,

2
src/core/directives/tests/format-text.test.ts
View File

@ -66,7 +66,7 @@ describe('CoreFormatTextDirective', () => {
);
// Assert
const text = fixture.nativeElement.querySelector('core-format-text');
const text = fixture.nativeElement.querySelector('core-format-text .core-format-text-content');
expect(text).not.toBeNull();
expect(text.innerHTML).toEqual(sentence);
});

5
src/core/features/course/components/format/core-course-format.html
View File

@ -142,7 +142,10 @@
</ion-item-divider>
<ion-item class="ion-text-wrap" *ngIf="section.summary">
<core-format-text [text]="section.summary" contextLevel="course" [contextInstanceId]="course?.id"></core-format-text>
<ion-label>
<core-format-text [text]="section.summary" contextLevel="course" [contextInstanceId]="course?.id">
</core-format-text>
</ion-label>
</ion-item>
<ng-container *ngFor="let module of section.modules">

1
src/theme/bootstrap.scss
View File

@ -9,6 +9,7 @@
clip: rect(0, 0, 0, 0);
white-space: nowrap;
border: 0;
display: block !important;
}
.sr-only-focusable:active, .sr-only-focusable:focus {

94
src/theme/components/format-text.scss
View File

@ -2,22 +2,70 @@
/** Styles of elements inside the directive should be placed in format-text.scss */
@import "~theme/globals";
:root {
--background: var(--background, #{$ion-item-background});
--background-gradient-rgb: var(--background-rgb, #{color-to-rgb-list($ion-item-background)});
--viewer-icon-background: rgba(255, 255, 255, .5);
core-format-text {
--core-format-text-background: var(--background, #{$ion-item-background});
--core-format-text-background-gradient-rgb: var(--background-rgb, #{color-to-rgb-list($ion-item-background)});
--core-format-text-viewer-icon-background: rgba(255, 255, 255, .5);
--core-format-text-loader-shine: 251,251,251;
}
:root body.dark {
--background: var(--background, #{$ion-item-background-dark});
--background-gradient-rgb: var(--background-rgb, #{color-to-rgb-list($ion-item-background-dark)});
--viewer-icon-background: rgba(0, 0, 0, .5);
body.dark core-format-text {
--core-format-text-background: var(--background, #{$ion-item-background-dark});
--core-format-text-background-gradient-rgb: var(--background-rgb, #{color-to-rgb-list($ion-item-background-dark)});
--core-format-text-viewer-icon-background: rgba(0, 0, 0, .5);
--core-format-text-loader-shine: 90,90,90;
}
core-format-text {
user-select: text;
word-break: break-word;
word-wrap: break-word;
display: contents;
.core-format-text-loader {
opacity: 0;
@include core-transition(opacity, 200ms);
display: contents;
}
&.core-format-text-loading {
position: relative;
width: 100%;
height: 100%;
opacity: 1;
background-color: rgba(0,0,0,.1);
overflow: hidden;
border-radius: 5px;
display: block;
.core-format-text-loader {
position: absolute;
left: -45%;
height: 100%;
width: 45%;
background-image: -webkit-linear-gradient(to left, rgba(var(--core-format-text-loader-shine), .05), rgba(var(--core-format-text-loader-shine), .3), rgba(var(--core-format-text-loader-shine), .6), rgba(var(--core-format-text-loader-shine), .3), rgba(var(--core-format-text-loader-shine), .05));
background-image: linear-gradient(to left, rgba(var(--core-format-text-loader-shine), .05), rgba(var(--core-format-text-loader-shine), .3), rgba(var(--core-format-text-loader-shine), .6), rgba(var(--core-format-text-loader-shine), .3), rgba(var(--core-format-text-loader-shine), .05));
animation: loading 1s infinite;
opacity: 1;
display: inline;
}
.core-format-text-content {
opacity: 0;
display: inline;
}
.core-show-more {
display: none !important;
}
}
.core-format-text-content {
opacity: 1;
@include core-transition(opacity, 200ms);
display: contents;
user-select: text;
word-break: break-word;
word-wrap: break-word;
}
&[maxHeight],
&[ng-reflect-max-height] {
@ -57,7 +105,7 @@ core-format-text {
position: absolute;
@include position(null, 0, 0, null);
z-index: 7;
background-color: var(--background);
background-color: var(--core-format-text-background);
color: var(--text-color);
@include padding(null, null, null, 10px);
margin: 0;
@ -68,10 +116,8 @@ core-format-text {
height: 100%;
position: absolute;
@include position(null, 0, 0, 0);
background: -moz-linear-gradient(top, rgba(var(--background-gradient-rgb), 0) calc(100% - 50px), rgba(var(--background-gradient-rgb), 1) calc(100% - 15px));
background: -webkit-gradient(left top, left bottom, color-stop(calc(100% - 50px), rgba(var(--background-gradient-rgb), 0)), color-stop(calc(100% - 15px), rgba(var(--background-gradient-rgb), 1)));
background: -webkit-linear-gradient(top, rgba(var(--background-gradient-rgb), 0) calc(100% - 50px), rgba(var(--background-gradient-rgb), 1) calc(100% - 15px));
background: linear-gradient(to bottom, rgba(var(--background-gradient-rgb), 0) calc(100% - 50px), rgba(var(--background-gradient-rgb), 1) calc(100% - 15px));
background: -webkit-linear-gradient(top, rgba(var(--core-format-text-background-gradient-rgb), 0) calc(100% - 50px), rgba(var(--core-format-text-background-gradient-rgb), 1) calc(100% - 15px));
background: linear-gradient(to bottom, rgba(var(--core-format-text-background-gradient-rgb), 0) calc(100% - 50px), rgba(var(--core-format-text-background-gradient-rgb), 1) calc(100% - 15px));
z-index: 6;
}
}
@ -115,15 +161,15 @@ core-format-text {
.core-adapted-img-container {
position: relative;
display: inline-block;
width: 100%;
max-width: 100%;
}
.core-image-viewer-icon {
position: absolute;
@include position(null, 10px, 10px, null);
color: var(--black);
color: var(--ion-text-color);
border-radius: 5px;
background-color: var(--viewer-icon-background);
background-color: var(--core-format-text-viewer-icon-background);
display: flex;
width: var(--a11y-min-target-size);
@ -141,3 +187,13 @@ core-format-text {
}
}
}
@keyframes loading {
0% {
left: -45%;
}
100% {
left: 100%;
}
}