forked from potsda.mn/mobilizon
Add Blurhash to front-end
Signed-off-by: Thomas Citharel <tcit@tcit.fr>
This commit is contained in:
Thomas Citharel
parent
a24e08a6de
commit
1ac9b43a61
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@ -30,6 +30,7 @@
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"@tiptap/starter-kit": "^2.0.0-beta.37",
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"@tiptap/vue-2": "^2.0.0-beta.21",
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"apollo-absinthe-upload-link": "^1.5.0",
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"blurhash": "^1.1.3",
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"buefy": "^0.9.0",
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"bulma-divider": "^0.2.0",
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"core-js": "^3.6.4",
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33
js/src/components/Event/EventBanner.vue
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33
js/src/components/Event/EventBanner.vue
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@ -0,0 +1,33 @@
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<template>
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<div class="banner-container">
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<lazy-image-wrapper :picture="picture" />
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</div>
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</template>
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<script lang="ts">
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import { IMedia } from "@/types/media.model";
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import { Component, Prop, Vue } from "vue-property-decorator";
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import LazyImageWrapper from "../Image/LazyImageWrapper.vue";
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@Component({
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components: {
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LazyImageWrapper,
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},
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})
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export default class EventBanner extends Vue {
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@Prop({ required: true, default: null })
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picture!: IMedia | null;
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}
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</script>
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<style lang="scss" scoped>
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.banner-container {
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display: flex;
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justify-content: center;
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height: 400px;
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}
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::v-deep img {
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width: 100%;
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height: 100%;
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object-fit: cover;
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object-position: 50% 50%;
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}
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</style>
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@ -4,12 +4,11 @@
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:to="{ name: 'Event', params: { uuid: event.uuid } }"
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>
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<div class="card-image">
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<figure
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class="image is-16by9"
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:style="`background-image: url('${
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event.picture ? event.picture.url : '/img/mobilizon_default_card.png'
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}')`"
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>
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<figure class="image is-16by9">
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<lazy-image-wrapper
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:picture="event.picture"
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style="height: 100%; position: absolute; top: 0; left: 0; width: 100%"
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/>
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<div
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class="tag-container"
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v-if="event.tags || event.status !== EventStatus.CONFIRMED"
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@ -34,6 +33,7 @@
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<div class="media">
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<div class="media-left">
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<date-calendar-icon
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:small="true"
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v-if="!mergedOptions.hideDate"
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:date="event.beginsOn"
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/>
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@ -103,6 +103,7 @@
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import { IEvent, IEventCardOptions } from "@/types/event.model";
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import { Component, Prop, Vue } from "vue-property-decorator";
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import DateCalendarIcon from "@/components/Event/DateCalendarIcon.vue";
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import LazyImageWrapper from "@/components/Image/LazyImageWrapper.vue";
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import { Actor, Person } from "@/types/actor";
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import { EventStatus, ParticipantRole } from "@/types/enums";
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import RouteName from "../../router/name";
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@ -110,6 +111,7 @@ import RouteName from "../../router/name";
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@Component({
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components: {
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DateCalendarIcon,
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LazyImageWrapper,
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},
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})
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export default class EventCard extends Vue {
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@ -220,6 +222,22 @@ a.card {
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.card-content {
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padding: 0.5rem;
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& > .media {
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position: relative;
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display: flex;
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flex-direction: column;
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& > .media-left {
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margin-top: -15px;
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height: 0;
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display: flex;
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align-items: flex-end;
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align-self: flex-start;
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margin-bottom: 15px;
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margin-left: 0rem;
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}
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}
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.event-title {
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font-size: 1.2rem;
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line-height: 1.25rem;
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34
js/src/components/Image/BlurhashImg.vue
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34
js/src/components/Image/BlurhashImg.vue
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@ -0,0 +1,34 @@
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<template>
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<canvas ref="canvas" width="32" height="32" />
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</template>
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<script lang="ts">
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import { decode } from "blurhash";
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import { Component, Prop, Ref, Vue } from "vue-property-decorator";
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@Component
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export default class extends Vue {
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@Prop({ type: String, required: true }) hash!: string;
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@Prop({ type: Number, default: 1 }) aspectRatio!: string;
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@Ref("canvas") readonly canvas!: any;
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mounted(): void {
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const pixels = decode(this.hash, 32, 32);
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const imageData = new ImageData(pixels, 32, 32);
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const context = this.canvas.getContext("2d");
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context.putImageData(imageData, 0, 0);
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}
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}
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</script>
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<style lang="scss" scoped>
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canvas {
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position: absolute;
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top: 0px;
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right: 0px;
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bottom: 0px;
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left: 0px;
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width: 100%;
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height: 100%;
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}
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</style>
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117
js/src/components/Image/LazyImage.vue
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117
js/src/components/Image/LazyImage.vue
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@ -0,0 +1,117 @@
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<template>
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<div ref="wrapper" class="wrapper" v-bind="$attrs">
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<div class="relative container">
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<!-- Show the placeholder as background -->
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<blurhash-img
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v-if="blurhash"
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:hash="blurhash"
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:aspect-ratio="height / width"
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class="top-0 left-0 transition-opacity duration-500"
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:class="isLoaded ? 'opacity-0' : 'opacity-100'"
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/>
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<!-- Show the real image on the top and fade in after loading -->
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<img
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ref="image"
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:width="width"
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:height="height"
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class="absolute top-0 left-0 transition-opacity duration-500"
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:class="isLoaded ? 'opacity-100' : 'opacity-0'"
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alt=""
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/>
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</div>
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</div>
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</template>
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<script lang="ts">
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import { Prop, Component, Vue, Ref, Watch } from "vue-property-decorator";
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import BlurhashImg from "./BlurhashImg.vue";
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@Component({
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components: {
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BlurhashImg,
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},
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})
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export default class LazyImage extends Vue {
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@Prop({ type: String, required: true }) src!: string;
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@Prop({ type: String, required: false, default: null }) blurhash!: string;
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@Prop({ type: Number, default: 1 }) width!: number;
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@Prop({ type: Number, default: 1 }) height!: number;
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inheritAttrs = false;
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isLoaded = false;
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observer!: IntersectionObserver;
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@Ref("wrapper") readonly wrapper!: any;
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@Ref("image") image!: any;
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mounted(): void {
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this.observer = new IntersectionObserver((entries) => {
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if (entries[0].isIntersecting) {
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this.onEnter();
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}
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});
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this.observer.observe(this.wrapper);
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}
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unmounted(): void {
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this.observer.disconnect();
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}
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onEnter(): void {
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// Image is visible (means: has entered the viewport),
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// so start loading by setting the src attribute
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this.image.src = this.src;
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this.image.onload = () => {
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// Image is loaded, so start fading in
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this.isLoaded = true;
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};
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}
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@Watch("src")
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updateImageWithSrcChange(): void {
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this.onEnter();
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}
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}
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</script>
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<style lang="scss" scoped>
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.relative {
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position: relative;
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}
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.absolute {
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position: absolute;
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}
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.top-0 {
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top: 0;
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}
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.left-0 {
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left: 0;
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}
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.opacity-100 {
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opacity: 100%;
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}
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.opacity-0 {
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opacity: 0;
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}
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.transition-opacity {
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transition-property: opacity;
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transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
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}
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.duration-500 {
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transition-duration: 0.5s;
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}
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.wrapper,
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.container {
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display: flex;
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flex: 1;
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}
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img {
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width: 100%;
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height: 100%;
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object-fit: cover;
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object-position: 50% 50%;
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}
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</style>
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40
js/src/components/Image/LazyImageWrapper.vue
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40
js/src/components/Image/LazyImageWrapper.vue
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@ -0,0 +1,40 @@
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<template>
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<lazy-image
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v-if="pictureOrDefault.url !== undefined"
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:src="pictureOrDefault.url"
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:width="pictureOrDefault.metadata.width"
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:height="pictureOrDefault.metadata.height"
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:blurhash="pictureOrDefault.metadata.blurhash"
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/>
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</template>
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<script lang="ts">
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import { IMedia } from "@/types/media.model";
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import { Component, Prop, Vue } from "vue-property-decorator";
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import LazyImage from "../Image/LazyImage.vue";
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@Component({
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components: {
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LazyImage,
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},
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})
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export default class LazyImageWrapper extends Vue {
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@Prop({ required: true, default: null })
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picture!: IMedia | null;
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get pictureOrDefault(): Partial<IMedia> {
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return {
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url:
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this?.picture?.url === null
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? "/img/mobilizon_default_card.png"
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: this?.picture?.url,
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metadata: {
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width: this?.picture?.metadata?.width || 630,
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height: this?.picture?.metadata?.height || 350,
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blurhash:
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this?.picture?.metadata?.blurhash ||
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"MCHKI4El-P-U}+={R-WWoes,Iu-P=?R,xD",
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},
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};
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}
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}
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</script>
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@ -3,6 +3,7 @@ export interface IMedia {
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url: string;
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name: string;
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alt: string;
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metadata: IMediaMetadata;
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}
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export interface IMediaUpload {
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@ -10,3 +11,9 @@ export interface IMediaUpload {
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name: string;
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alt: string | null;
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}
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export interface IMediaMetadata {
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width?: number;
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height?: number;
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blurhash?: string;
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}
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@ -3416,6 +3416,11 @@ bluebird@^3.1.1, bluebird@^3.7.2:
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resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
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integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
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blurhash@^1.1.3:
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version "1.1.3"
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resolved "https://registry.yarnpkg.com/blurhash/-/blurhash-1.1.3.tgz#dc325af7da836d07a0861d830bdd63694382483e"
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integrity sha512-yUhPJvXexbqbyijCIE/T2NCXcj9iNPhWmOKbPTuR/cm7Q5snXYIfnVnz6m7MWOXxODMz/Cr3UcVkRdHiuDVRDw==
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body-parser@1.19.0:
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version "1.19.0"
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resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"
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