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<!-- ldgallery - A static generator which turns a collection of tagged
-- pictures into a searchable web gallery.
--
-- Copyright (C) 2019-2022 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"
:class="$style.pictureContainer"
@dblclick="uiStore.toggleFullscreen()"
>
<img
v-if="!error"
ref="imageElement"
:src="itemResourceUrl"
:class="[$style.pictureElement, $style.slowLoading]"
:style="imageStyle"
@load="clearSlowLoading"
@error="onError"
>
<LdLoading v-if="loader" />
</div>
</template>
<script setup lang="ts">
import { PictureItem } from '@/@types/gallery';
import LdLoading from '@/components/LdLoading.vue';
import { useItemResource } from '@/services/ui/ldItemResourceUrl';
import { useLdZoom } from '@/services/ui/ldZoom';
import { useUiStore } from '@/store/uiStore';
import { unrefElement, VueInstance } from '@vueuse/core';
import { createToast } from 'mosha-vue-toastify';
import { CSSProperties, onMounted, onUnmounted, PropType, ref, toRef } from 'vue';
import { useI18n } from 'vue-i18n';
const props = defineProps({
item: { type: Object as PropType<PictureItem>, required: true },
});
const { t } = useI18n();
const uiStore = useUiStore();
const imageStyle = ref<CSSProperties>({});
const error = ref(false);
const loader = ref(false);
const containerElement = ref<HTMLDivElement>();
const imageElement = ref<VueInstance>();
const { itemResourceUrl, thumbnailResourceUrl } = useItemResource(toRef(props, 'item'));
onMounted(() => {
generateSlowLoadingStyle();
if (!containerElement.value) return;
useLdZoom(
imageStyle,
containerElement.value,
unrefElement(imageElement) as HTMLImageElement,
props.item.properties,
);
});
onUnmounted(() => {
clearSlowLoading();
});
function clearSlowLoading() {
imageStyle.value.backgroundImage = undefined;
loader.value = false;
}
function generateSlowLoadingStyle() {
clearSlowLoading();
loader.value = true;
if (thumbnailResourceUrl.value) {
imageStyle.value.backgroundImage = `url('${thumbnailResourceUrl.value}')`;
}
}
function onError() {
clearSlowLoading();
error.value = true;
createToast(t('gallery.resource-loading-error'), {
type: 'danger',
position: 'top-center',
timeout: 10000,
showIcon: true,
});
}
</script>
<style lang="scss" module>
@import "~@/assets/scss/theme";
.pictureContainer {
height: 100%;
}
.pictureElement {
max-width: unset;
max-height: unset;
cursor: grab;
}
.slowLoading {
background-repeat: no-repeat;
background-position: center;
background-size: contain;
background-color: $content-bgcolor;
background-blend-mode: soft-light;
opacity: 1 !important;
}
</style>
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