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<!-- ldgallery - A static generator which turns a collection of tagged
-- pictures into a searchable web gallery.
--
-- Copyright (C) 2019-2020 Guillaume FOUET
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as
-- published by the Free Software Foundation, either version 3 of the
-- License, or (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <https://www.gnu.org/licenses/>.
-->
<template>
<div
ref="containerElement"
v-dragscroll
class="scrollbar ld-picture-container"
@click.capture="e => dragScrollClickFix.onClickCapture(e)"
@dblclick="$uiStore.toggleFullscreen()"
@dragstart.prevent
@dragscrollstart="dragScrollClickFix.onDragScrollStart()"
@dragscrollend="dragScrollClickFix.onDragScrollEnd()"
>
<v-lazy-image
ref="imageElement"
:src="pictureSrc(picture.properties.resource)"
class="ld-picture-element"
:class="{'slow-loading': Boolean(slowLoadingStyle)}"
:style="slowLoadingStyle"
@load="lazyImageLoaded"
/>
<b-loading :active="loader" :is-full-page="false" class="ld-picture-loader" />
</div>
</template>
<script lang="ts">
import { Component, Vue, Prop, Ref } from "vue-property-decorator";
import LdZoom from "@/services/ldzoom";
import DragScrollClickFix from "@/services/dragscrollclickfix";
@Component
export default class LdPicture extends Vue {
@Prop({ required: true }) readonly picture!: Gallery.Picture;
@Ref() readonly containerElement!: HTMLDivElement;
@Ref() readonly imageElement!: any; // FIXME: no typedef for v-lazy-image
readonly SLOW_LOADING_TIMEOUT_MS: number = 1500;
readonly dragScrollClickFix = new DragScrollClickFix();
slowLoadingStyle: string | null = null;
loader: boolean = false;
timer: NodeJS.Timeout | null = null;
mounted() {
this.timer = setTimeout(this.generateSlowLoadingStyle, this.SLOW_LOADING_TIMEOUT_MS);
}
destroyed() {
this.clearSlowLoading();
}
lazyImageLoaded() {
this.clearSlowLoading();
new LdZoom(this.containerElement, this.imageElement.$el, 10, 1 / 5).install();
}
clearSlowLoading() {
if (this.timer) clearTimeout(this.timer);
this.timer = null;
this.slowLoadingStyle = null;
this.loader = false;
}
pictureSrc(resource: string) {
return `${process.env.VUE_APP_DATA_URL}${this.$galleryStore.config!.galleryRoot}${resource}`;
}
generateSlowLoadingStyle() {
this.clearSlowLoading();
this.loader = true;
if (this.picture.thumbnail) {
const url = this.pictureSrc(this.picture.thumbnail.resource);
this.slowLoadingStyle = `background-image: url('${url}');`;
}
}
}
</script>
<style lang="scss">
@import "~@/assets/scss/theme.scss";
.ld-picture-container {
height: 100%;
}
.ld-picture-element {
max-width: unset;
max-height: unset;
cursor: grab;
}
.slow-loading {
background-repeat: no-repeat;
background-position: center;
background-size: contain;
background-color: $content-bgcolor;
background-blend-mode: soft-light;
opacity: 1 !important;
}
.ld-picture-loader {
position: relative;
& .loading-background {
background: none !important;
}
}
</style>
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