Merge pull request #68 from pacien/oz-viewer

1 files changed, 119 insertions, 0 deletions

diff --git a/viewer/src/components/LdPicture.vue b/viewer/src/components/LdPicture.vue
new file mode 100644
index 0000000..5425a00
--- /dev/null
+++ b/viewer/src/components/LdPicture.vue
@@ -0,0 +1,119 @@
+<!-- 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
+    v-dragscroll
+    class="scrollbar"
+    :class="{'fit-to-screen': !$uiStore.fullscreen, 'original-size': $uiStore.fullscreen}"
+    @click="onClick"
+    @dragscrollstart="dragging=true"
+  >
+    <v-lazy-image
+      :src="pictureSrc()"
+      :class="{'slow-loading': Boolean(slowLoadingStyle)}"
+      :style="slowLoadingStyle"
+      @load="clearTimer"
+    />
+    <b-loading :active="Boolean(slowLoadingStyle)" :is-full-page="false" class="ld-picture-loader" />
+  </div>
+</template>
+
+<script lang="ts">
+import { Component, Vue, Prop } from "vue-property-decorator";
+
+@Component
+export default class LdPicture extends Vue {
+  @Prop({ required: true }) readonly picture!: Gallery.Picture;
+
+  readonly SLOW_LOADING_TIMEOUT_MS: number = 1500;
+
+  dragging: boolean = false;
+  slowLoadingStyle: string | null = null;
+  timer: NodeJS.Timeout | null = null;
+
+  mounted() {
+    if (this.picture.thumbnail) this.timer = setTimeout(this.generateSlowLoadingStyle, this.SLOW_LOADING_TIMEOUT_MS);
+  }
+
+  destroyed() {
+    this.clearTimer();
+  }
+
+  clearTimer() {
+    if (this.timer) clearTimeout(this.timer);
+    this.timer = null;
+    this.slowLoadingStyle = null;
+  }
+
+  pictureSrc() {
+    return `${process.env.VUE_APP_DATA_URL}${this.picture.properties.resource}`;
+  }
+
+  generateSlowLoadingStyle() {
+    this.clearTimer();
+    this.slowLoadingStyle = `background-image: url('${process.env.VUE_APP_DATA_URL}${this.picture.thumbnail}');`;
+  }
+
+  onClick() {
+    if (!this.dragging) this.$uiStore.toggleFullscreen();
+    this.dragging = false;
+  }
+}
+</script>
+
+<style lang="scss">
+@import "@/assets/scss/theme.scss";
+
+.ld-picture-loader {
+  position: relative;
+  & .loading-background {
+    background: none !important;
+  }
+}
+img.slow-loading {
+  background-repeat: no-repeat;
+  background-position: center;
+  background-size: contain;
+  background-color: $content-bgcolor;
+  background-blend-mode: soft-light;
+  opacity: 1 !important;
+}
+.fit-to-screen {
+  display: flex;
+  justify-content: space-around;
+  height: 100%;
+  & > img {
+    object-fit: contain;
+    cursor: zoom-in;
+  }
+}
+.original-size {
+  display: block;
+  text-align: center;
+  cursor: grab;
+  height: 100%;
+  & > img {
+    max-width: unset;
+    max-height: unset;
+    object-fit: none;
+    cursor: zoom-out;
+  }
+}
+</style>