adjust videoscroll size according to svg element, add all directions

app/src/components/SVGContent.vue

@@ -150,6 +150,10 @@ async function processScrolls(svg: XMLDocument): Promise<VideoScrollDef[]> {
             const descNode = el.children[0]; // to fix
             const [directionString, filesURL] = descNode.textContent!.split("\n");
 
+            if (!Object.values(VideoScrollDirection).includes(directionString as VideoScrollDirection)) {
+              throw new Error("Unknown direction string.");
+            }
+
             const fileFetch = await fetch(`content/${filesURL}`);
             const preURL = fileFetch.url.replace(/\/files.lst$/, "");
             const files = (await fileFetch.text()).split("\n").filter(Boolean).map((str) => `${preURL}/${str}`);
@@ -157,11 +161,10 @@ async function processScrolls(svg: XMLDocument): Promise<VideoScrollDef[]> {
             return {
               top: el.y.baseVal.value * ratio,
               left: el.x.baseVal.value * ratio,
-              direction: VideoScrollDirection.RIGHT,
-              files,
-              style: {
-                width: `${el.width.baseVal.value * ratio}px`
-              }
+              width: el.width.baseVal.value * ratio,
+              height: el.height.baseVal.value * ratio,
+              direction: directionString as VideoScrollDirection,
+              files
             };
           })
   );

app/src/components/VideoScroll.vue

@@ -1,21 +1,45 @@
 <template>
   <div class="video-scroll" ref="root">
+    <template v-if="definition.direction === 'left' || definition.direction === 'right'">
       <img class="visible loaded"
            :src="definition.files[0]"
            :style="{
               top: `${Math.round(definition.top)}px`,
-            left:`${Math.round(definition.left)}px`,
+              left: `${Math.round(definition.left)}px`,
+              width: `${Math.round(definition.width)}px`,
             }"
       />
 
+      <!--suppress RequiredAttributes -->
       <img v-for="(file, idx) in definition.files.slice(1)"
            :data-src="file"
            :style="{
              top: `${Math.round(definition.top)}px`,
-           left: `${Math.round(definition.left) + width * (idx + 1)}px`,
+             left: `${Math.round(definition.left) + (definition.width * (idx + 1) * directionSign)}px`,
+             width: `${Math.round(definition.width)}px`,
+           }"
+      />
+    </template>
+    <template v-else>
+      <img class="visible loaded"
+           :src="definition.files[0]"
+           :style="{
+              top: `${Math.round(definition.top)}px`,
+              left: `${Math.round(definition.left)}px`,
+              height: `${Math.round(definition.height)}px`,
             }"
       />
 
+      <!--suppress RequiredAttributes -->
+      <img v-for="(file, idx) in definition.files.slice(1)"
+           :data-src="file"
+           :style="{
+             top: `${Math.round(definition.top) + (definition.height * (idx + 1) * directionSign)}px`,
+             left: `${Math.round(definition.left)}px`,
+             height: `${Math.round(definition.height)}px`,
+           }"
+      />
+    </template>
   </div>
 </template>
 
@@ -30,17 +54,19 @@ export default defineComponent({
       required: true
     }
   },
+  computed: {
+    directionSign() {
+      if (this.definition.direction == VideoScrollDirection.RIGHT ||
+          this.definition.direction == VideoScrollDirection.DOWN) {
+        return 1;
+      } else {
+        return -1;
+      }
+    }
+  },
   setup(props) {
-    const width = ref(0);
-    const height = ref(0);
     const root = ref<Element | null>(null);
 
-    const definition = props.definition as VideoScrollDef;
-    getMeta(definition.files[0]).then((img) => {
-      width.value = img.width;
-      height.value = img.height;
-    });
-
     onMounted(() => {
       const observer = new IntersectionObserver((entries, observer) => {
         entries.forEach((entry) => {
@@ -64,36 +90,27 @@ export default defineComponent({
     });
 
     return {
-      root,
-      width,
-      height
+      root
     };
-
   }
 });
 
 export enum VideoScrollDirection {
-  RIGHT
+  RIGHT = "right",
+  LEFT = "left",
+  UP = "up",
+  DOWN = "down"
 }
 
 export interface VideoScrollDef {
   top: number,
   left: number,
+  width: number,
+  height: number,
   direction: VideoScrollDirection,
-  files: string[],
-  style?: { [key: string]: string }
+  files: string[]
 }
 
-function getMeta(url: string): Promise<HTMLImageElement> {
-  return new Promise((resolve, reject) => {
-    let img = new Image();
-    img.onload = () => resolve(img);
-    img.onerror = () => reject();
-    img.src = url;
-  });
-}
-
-
 </script>
 
 <!-- Add "scoped" attribute to limit CSS to this component only -->