perf(reader): virtual rendering avec IntersectionObserver en mode scroll
Remplace le rendu de tous les composants ReaderPage par un système de virtual rendering : seules les pages dans la zone ±1000px du viewport sont montées, les autres sont remplacées par un placeholder dimensionné. - InfiniteReader : ajout visibilityObserver + mountedPageIndices (Set réactif), helper getPlaceholderHeight(), suppression de 5 console.log - ReaderPage : prop windowWidth injectable depuis le parent, listener resize conditionnel, suppression de 3 console.log de debug
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ext.jeremy.guillot@maxicoffee.domains
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@@ -1,10 +1,26 @@
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<template>
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<div class="infinite-reader" ref="containerRef">
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<div v-for="(page, index) in pages" :key="index" class="page-wrapper">
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<div v-for="(page, index) in pages" :key="index"
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class="page-wrapper" :data-page-index="index">
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<!-- Pas d'URL : spinner de chargement -->
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<div v-if="!page?.url" class="loading">
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<div class="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600"></div>
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</div>
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<ReaderPage v-else :page-data="page" :page-number="index + 1" :zoom="zoom" :double-page-mode="doublePageMode" loading="lazy" />
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<!-- Hors de la zone de rendu : placeholder dimensionné -->
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<div v-else-if="!mountedPageIndices.has(index)"
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class="page-placeholder"
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:style="{ height: getPlaceholderHeight(page) + 'px' }" />
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<!-- Dans la zone : composant complet -->
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<ReaderPage v-else
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:page-data="page"
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:page-number="index + 1"
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:zoom="zoom"
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:double-page-mode="doublePageMode"
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:window-width="windowWidth"
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loading="lazy" />
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</div>
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<!-- Bouton flottant pour revenir en haut -->
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@@ -33,7 +49,7 @@
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</template>
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<script setup>
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import { nextTick, onMounted, onUnmounted, ref, watch } from 'vue';
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import { nextTick, onMounted, onUnmounted, reactive, ref, watch } from 'vue';
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import { useHeaderStore } from '../../../../shared/stores/headerStore';
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import ReaderPage from './ReaderPage.vue';
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@@ -57,6 +73,8 @@ import ReaderPage from './ReaderPage.vue';
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const headerStore = useHeaderStore();
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const containerRef = ref(null);
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const observer = ref(null);
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const visibilityObserver = ref(null);
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const mountedPageIndices = reactive(new Set());
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const windowWidth = ref(window.innerWidth);
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// État unique pour tous les boutons flottants avec timer de 3 secondes
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@@ -76,24 +94,46 @@ import ReaderPage from './ReaderPage.vue';
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});
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};
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const setupIntersectionObserver = () => {
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if (observer.value) {
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observer.value.disconnect();
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}
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// Calcul de la hauteur du placeholder — miroir exact du maxWidth de ReaderPage
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const getPlaceholderHeight = (page) => {
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const dims = page?.dimensions;
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if (!dims?.width || !dims?.height) return 800;
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const displayWidth = windowWidth.value < 1200
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? Math.min(dims.width, windowWidth.value * 0.95)
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: Math.min(dims.width, 1200);
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return Math.round((dims.height / dims.width) * displayWidth);
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};
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const setupObservers = () => {
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observer.value?.disconnect();
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visibilityObserver.value?.disconnect();
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observer.value = new IntersectionObserver(observeIntersection, {
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root: null,
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threshold: 0.5
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});
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nextTick(() => {
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const pageElements = containerRef.value?.querySelectorAll('.page-wrapper');
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if (pageElements) {
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pageElements.forEach((element, index) => {
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element.setAttribute('data-page-index', index);
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observer.value.observe(element);
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visibilityObserver.value = new IntersectionObserver(
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(entries) => {
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entries.forEach(entry => {
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const idx = parseInt(entry.target.getAttribute('data-page-index'));
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if (entry.isIntersecting) {
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mountedPageIndices.add(idx);
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} else {
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mountedPageIndices.delete(idx);
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}
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});
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}
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},
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{ root: null, rootMargin: '1000px 0px', threshold: 0 }
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);
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nextTick(() => {
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const els = containerRef.value?.querySelectorAll('.page-wrapper');
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els?.forEach((el, i) => {
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el.setAttribute('data-page-index', i);
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observer.value.observe(el);
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visibilityObserver.value.observe(el);
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});
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});
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};
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@@ -177,21 +217,16 @@ import ReaderPage from './ReaderPage.vue';
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// Fonction pour revenir en haut de la page
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const scrollToTop = () => {
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console.log('scrollToTop appelée'); // Debug
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// Réinitialiser le timer lors du clic
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resetButtonsTimer();
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// Stratégie 1: Scroll sur le conteneur direct
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if (containerRef.value) {
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console.log('containerRef trouvé, scrollTop actuel:', containerRef.value.scrollTop); // Debug
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if (containerRef.value.scrollTop > 0) {
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containerRef.value.scrollTo({
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top: 0,
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behavior: 'smooth'
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});
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console.log('Scroll sur containerRef effectué'); // Debug
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return;
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}
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}
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@@ -201,7 +236,6 @@ import ReaderPage from './ReaderPage.vue';
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while (currentElement) {
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const styles = window.getComputedStyle(currentElement);
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if (styles.overflowY === 'auto' || styles.overflowY === 'scroll' || currentElement.scrollTop > 0) {
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console.log('Conteneur avec scroll trouvé:', currentElement.className, 'scrollTop:', currentElement.scrollTop); // Debug
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currentElement.scrollTo({
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top: 0,
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behavior: 'smooth'
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@@ -212,7 +246,6 @@ import ReaderPage from './ReaderPage.vue';
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}
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// Stratégie 3: Scroll sur la fenêtre entière
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console.log('Scroll sur window, scrollY actuel:', window.scrollY); // Debug
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window.scrollTo({
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top: 0,
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behavior: 'smooth'
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@@ -228,7 +261,8 @@ import ReaderPage from './ReaderPage.vue';
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watch(
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() => props.pages,
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() => {
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setupIntersectionObserver();
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mountedPageIndices.clear();
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setupObservers();
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},
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{ immediate: true }
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);
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@@ -247,7 +281,7 @@ import ReaderPage from './ReaderPage.vue';
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};
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onMounted(() => {
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setupIntersectionObserver();
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setupObservers();
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// Activer l'auto-hide du header si la largeur < 1200px
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if (windowWidth.value < 1200) {
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@@ -267,9 +301,8 @@ import ReaderPage from './ReaderPage.vue';
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});
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onUnmounted(() => {
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if (observer.value) {
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observer.value.disconnect();
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}
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observer.value?.disconnect();
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visibilityObserver.value?.disconnect();
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// Désactiver l'auto-hide du header en quittant
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headerStore.disableAutoHide();
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@@ -303,6 +336,12 @@ import ReaderPage from './ReaderPage.vue';
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@apply mb-2 sm:mb-4 px-1 sm:px-4;
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}
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.page-placeholder {
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@apply w-full;
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max-width: 1200px;
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min-height: 400px;
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}
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.loading,
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.error {
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@apply flex items-center justify-center min-h-[400px];
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