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<!--
-- ldgallery - A static generator which turns a collection of tagged
-- pictures into a searchable web gallery.
--
-- Copyright (C) 2022 Pacien TRAN-GIRARD
--
-- 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 :class="$style.container">
<div
ref="view"
:class="$style.epubView"
class="scrollbar"
/>
<ul
v-if="prevSection || nextSection"
:class="$style.navBar"
>
<li>
<a
v-if="prevSection"
@click.prevent="goToPrevSection"
>« {{ prevSectionLabel }}</a>
</li>
<li>
{{ currSectionLabel }}
</li>
<li>
<a
v-if="nextSection"
@click.prevent="goToNextSection"
>{{ nextSectionLabel }} »</a>
</li>
</ul>
</div>
</template>
<script setup lang="ts">
import { EPUBItem } from '@/@types/gallery';
import { useItemResource } from '@/services/ui/ldItemResourceUrl';
import ePub from 'epubjs';
import { SpineItem } from 'epubjs/types/section';
import { PropType, Ref, ref, toRef, computed, watchEffect } from 'vue';
import { useI18n } from 'vue-i18n';
const { t } = useI18n();
const props = defineProps({
item: { type: Object as PropType<EPUBItem>, required: true },
});
const { itemResourceUrl } = useItemResource(toRef(props, 'item'));
const view = ref<HTMLDivElement>();
const book = computed(() => ePub(itemResourceUrl.value));
const rendition = computed(() => {
if (!view.value) return;
return book.value.renderTo(view.value, {
flow: 'scrolled-doc',
width: '100%',
fullsize: true,
});
});
const currSection = ref<SpineItem>();
const prevSection = ref<SpineItem>();
const nextSection = ref<SpineItem>();
// TODO: reflow on side panel open/close event, like when resizing the window
watchEffect(async() => {
if (!rendition.value) return;
await rendition.value.display();
rendition.value.on('rendered', updateNavigation);
});
function updateNavigation(currentSection: SpineItem) {
currSection.value = currentSection;
prevSection.value = currentSection.prev();
nextSection.value = currentSection.next();
}
const currSectionLabel = computed(() => getSectionTitle(currSection) ?? '');
const prevSectionLabel = computed(() =>
getSectionTitle(prevSection) ?? t('epubViewer.previousSection'));
const nextSectionLabel = computed(() =>
getSectionTitle(nextSection) ?? t('epubViewer.nextSection'));
function getSectionTitle(section: Ref<SpineItem | undefined>): string | null {
if (!section.value?.href) return null;
return book.value?.navigation.get(section.value.href).label;
}
function goToPrevSection() {
rendition.value?.prev();
}
function goToNextSection() {
rendition.value?.next();
}
</script>
<style lang="scss" module>
@import "~@/assets/scss/theme";
.container {
display: flex;
flex-direction: column;
height: 100%;
}
.epubView {
flex: 1;
overflow-x: hidden;
}
.navBar {
display: flex;
flex-direction: row;
list-style-type: none;
margin: 0;
padding: .75em;
background-color: $panel-bottom-bgcolor;
color: $panel-bottom-txtcolor;
> * {
flex: 1;
text-align: center;
}
}
</style>
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