Add Blurhash to front-end

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
This commit is contained in:
Thomas Citharel 2021-06-10 09:41:07 +02:00
parent a24e08a6de
commit 1ac9b43a61
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GPG key ID: A061B9DDE0CA0773
8 changed files with 261 additions and 6 deletions

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@ -30,6 +30,7 @@
"@tiptap/starter-kit": "^2.0.0-beta.37",
"@tiptap/vue-2": "^2.0.0-beta.21",
"apollo-absinthe-upload-link": "^1.5.0",
"blurhash": "^1.1.3",
"buefy": "^0.9.0",
"bulma-divider": "^0.2.0",
"core-js": "^3.6.4",

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@ -0,0 +1,33 @@
<template>
<div class="banner-container">
<lazy-image-wrapper :picture="picture" />
</div>
</template>
<script lang="ts">
import { IMedia } from "@/types/media.model";
import { Component, Prop, Vue } from "vue-property-decorator";
import LazyImageWrapper from "../Image/LazyImageWrapper.vue";
@Component({
components: {
LazyImageWrapper,
},
})
export default class EventBanner extends Vue {
@Prop({ required: true, default: null })
picture!: IMedia | null;
}
</script>
<style lang="scss" scoped>
.banner-container {
display: flex;
justify-content: center;
height: 400px;
}
::v-deep img {
width: 100%;
height: 100%;
object-fit: cover;
object-position: 50% 50%;
}
</style>

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@ -4,12 +4,11 @@
:to="{ name: 'Event', params: { uuid: event.uuid } }"
>
<div class="card-image">
<figure
class="image is-16by9"
:style="`background-image: url('${
event.picture ? event.picture.url : '/img/mobilizon_default_card.png'
}')`"
>
<figure class="image is-16by9">
<lazy-image-wrapper
:picture="event.picture"
style="height: 100%; position: absolute; top: 0; left: 0; width: 100%"
/>
<div
class="tag-container"
v-if="event.tags || event.status !== EventStatus.CONFIRMED"
@ -34,6 +33,7 @@
<div class="media">
<div class="media-left">
<date-calendar-icon
:small="true"
v-if="!mergedOptions.hideDate"
:date="event.beginsOn"
/>
@ -103,6 +103,7 @@
import { IEvent, IEventCardOptions } from "@/types/event.model";
import { Component, Prop, Vue } from "vue-property-decorator";
import DateCalendarIcon from "@/components/Event/DateCalendarIcon.vue";
import LazyImageWrapper from "@/components/Image/LazyImageWrapper.vue";
import { Actor, Person } from "@/types/actor";
import { EventStatus, ParticipantRole } from "@/types/enums";
import RouteName from "../../router/name";
@ -110,6 +111,7 @@ import RouteName from "../../router/name";
@Component({
components: {
DateCalendarIcon,
LazyImageWrapper,
},
})
export default class EventCard extends Vue {
@ -220,6 +222,22 @@ a.card {
.card-content {
padding: 0.5rem;
& > .media {
position: relative;
display: flex;
flex-direction: column;
& > .media-left {
margin-top: -15px;
height: 0;
display: flex;
align-items: flex-end;
align-self: flex-start;
margin-bottom: 15px;
margin-left: 0rem;
}
}
.event-title {
font-size: 1.2rem;
line-height: 1.25rem;

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@ -0,0 +1,34 @@
<template>
<canvas ref="canvas" width="32" height="32" />
</template>
<script lang="ts">
import { decode } from "blurhash";
import { Component, Prop, Ref, Vue } from "vue-property-decorator";
@Component
export default class extends Vue {
@Prop({ type: String, required: true }) hash!: string;
@Prop({ type: Number, default: 1 }) aspectRatio!: string;
@Ref("canvas") readonly canvas!: any;
mounted(): void {
const pixels = decode(this.hash, 32, 32);
const imageData = new ImageData(pixels, 32, 32);
const context = this.canvas.getContext("2d");
context.putImageData(imageData, 0, 0);
}
}
</script>
<style lang="scss" scoped>
canvas {
position: absolute;
top: 0px;
right: 0px;
bottom: 0px;
left: 0px;
width: 100%;
height: 100%;
}
</style>

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@ -0,0 +1,117 @@
<template>
<div ref="wrapper" class="wrapper" v-bind="$attrs">
<div class="relative container">
<!-- Show the placeholder as background -->
<blurhash-img
v-if="blurhash"
:hash="blurhash"
:aspect-ratio="height / width"
class="top-0 left-0 transition-opacity duration-500"
:class="isLoaded ? 'opacity-0' : 'opacity-100'"
/>
<!-- Show the real image on the top and fade in after loading -->
<img
ref="image"
:width="width"
:height="height"
class="absolute top-0 left-0 transition-opacity duration-500"
:class="isLoaded ? 'opacity-100' : 'opacity-0'"
alt=""
/>
</div>
</div>
</template>
<script lang="ts">
import { Prop, Component, Vue, Ref, Watch } from "vue-property-decorator";
import BlurhashImg from "./BlurhashImg.vue";
@Component({
components: {
BlurhashImg,
},
})
export default class LazyImage extends Vue {
@Prop({ type: String, required: true }) src!: string;
@Prop({ type: String, required: false, default: null }) blurhash!: string;
@Prop({ type: Number, default: 1 }) width!: number;
@Prop({ type: Number, default: 1 }) height!: number;
inheritAttrs = false;
isLoaded = false;
observer!: IntersectionObserver;
@Ref("wrapper") readonly wrapper!: any;
@Ref("image") image!: any;
mounted(): void {
this.observer = new IntersectionObserver((entries) => {
if (entries[0].isIntersecting) {
this.onEnter();
}
});
this.observer.observe(this.wrapper);
}
unmounted(): void {
this.observer.disconnect();
}
onEnter(): void {
// Image is visible (means: has entered the viewport),
// so start loading by setting the src attribute
this.image.src = this.src;
this.image.onload = () => {
// Image is loaded, so start fading in
this.isLoaded = true;
};
}
@Watch("src")
updateImageWithSrcChange(): void {
this.onEnter();
}
}
</script>
<style lang="scss" scoped>
.relative {
position: relative;
}
.absolute {
position: absolute;
}
.top-0 {
top: 0;
}
.left-0 {
left: 0;
}
.opacity-100 {
opacity: 100%;
}
.opacity-0 {
opacity: 0;
}
.transition-opacity {
transition-property: opacity;
transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}
.duration-500 {
transition-duration: 0.5s;
}
.wrapper,
.container {
display: flex;
flex: 1;
}
img {
width: 100%;
height: 100%;
object-fit: cover;
object-position: 50% 50%;
}
</style>

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@ -0,0 +1,40 @@
<template>
<lazy-image
v-if="pictureOrDefault.url !== undefined"
:src="pictureOrDefault.url"
:width="pictureOrDefault.metadata.width"
:height="pictureOrDefault.metadata.height"
:blurhash="pictureOrDefault.metadata.blurhash"
/>
</template>
<script lang="ts">
import { IMedia } from "@/types/media.model";
import { Component, Prop, Vue } from "vue-property-decorator";
import LazyImage from "../Image/LazyImage.vue";
@Component({
components: {
LazyImage,
},
})
export default class LazyImageWrapper extends Vue {
@Prop({ required: true, default: null })
picture!: IMedia | null;
get pictureOrDefault(): Partial<IMedia> {
return {
url:
this?.picture?.url === null
? "/img/mobilizon_default_card.png"
: this?.picture?.url,
metadata: {
width: this?.picture?.metadata?.width || 630,
height: this?.picture?.metadata?.height || 350,
blurhash:
this?.picture?.metadata?.blurhash ||
"MCHKI4El-P-U}+={R-WWoes,Iu-P=?R,xD",
},
};
}
}
</script>

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@ -3,6 +3,7 @@ export interface IMedia {
url: string;
name: string;
alt: string;
metadata: IMediaMetadata;
}
export interface IMediaUpload {
@ -10,3 +11,9 @@ export interface IMediaUpload {
name: string;
alt: string | null;
}
export interface IMediaMetadata {
width?: number;
height?: number;
blurhash?: string;
}

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@ -3416,6 +3416,11 @@ bluebird@^3.1.1, bluebird@^3.7.2:
resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
blurhash@^1.1.3:
version "1.1.3"
resolved "https://registry.yarnpkg.com/blurhash/-/blurhash-1.1.3.tgz#dc325af7da836d07a0861d830bdd63694382483e"
integrity sha512-yUhPJvXexbqbyijCIE/T2NCXcj9iNPhWmOKbPTuR/cm7Q5snXYIfnVnz6m7MWOXxODMz/Cr3UcVkRdHiuDVRDw==
body-parser@1.19.0:
version "1.19.0"
resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"