502 lines
16 KiB
Vue
502 lines
16 KiB
Vue
<template>
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<div class="svg-content">
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<div :class="['loading-screen', {loaded: loadedPercent === 100}]">
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<div :style="{width: `${loadedPercent}%`}" class="loading-bar"></div>
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</div>
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<div class="content" ref="root">
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<div class="video-scrolls">
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<VideoScroll v-for="scroll in scrolls" :definition="scroll"/>
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</div>
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</div>
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<AudioArea v-for="audio in audioAreas" :definition="audio" :bbox="bbox"/>
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<div class="devpanel">
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<div>
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<span>Current viewport position:</span>
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<span>{{ Math.round(bbox.x) }}x{{ Math.round(bbox.y) }}</span>
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</div>
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<div>
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<span>Current cursor position:</span>
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<span>{{ Math.round(mousePosition.x) }}x{{ Math.round(mousePosition.y) }}</span>
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</div>
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<div>
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<span>Zoom level:</span><span>{{ (Math.round(bbox.z * 1000) / 1000) }}</span>
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</div>
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<label>
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<input v-model="showInternal" type="checkbox">
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<label>Show internal elements</label>
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</label>
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</div>
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</div>
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</template>
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<script lang="ts">
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import {defineComponent, onMounted, reactive, ref} from "vue";
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import createPanZoom, {PanZoom} from "panzoom";
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import VideoScroll, {VideoScrollDef, VideoScrollDirection} from "@/components/VideoScroll.vue";
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import AudioArea, {AudioAreaDef} from "@/components/AudioArea.vue";
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import Stats from "stats.js";
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import {rotate} from "@/utils";
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import fetchProgress from "fetch-progress";
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export interface BoundingBox {
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x: number,
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y: number,
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w: number,
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h: number,
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z: number
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}
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export default defineComponent({
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name: "SVGContent",
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components: {AudioArea, VideoScroll},
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props: {
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url: {
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type: String,
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required: true
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}
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},
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data() {
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return {
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showInternal: false
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};
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},
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watch: {
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showInternal(value) {
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Array.from(this.root!.getElementsByClassName("internal")).forEach((el) => {
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(el as SVGElement).style.visibility = value ? "visible" : "hidden";
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});
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}
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},
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setup(props, {emit}) {
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const root = ref<HTMLDivElement | null>(null);
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const loadedPercent = ref(0);
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const panzoom = ref<null | PanZoom>(null);
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const anchors = ref<SVGRectElement[]>([]);
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const scrolls = ref<VideoScrollDef[]>([]);
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const panToAnchor = ref();
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const audioAreas = ref<AudioAreaDef[]>([]);
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const bbox: BoundingBox = reactive({
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x: ref(0),
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y: ref(0),
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w: ref(0),
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h: ref(0),
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z: ref(1)
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});
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const mousePosition = reactive({
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x: ref(0),
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y: ref(0)
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});
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const panning = ref(false);
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onMounted(async () => {
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const element = root.value as unknown as HTMLDivElement;
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console.info("[SVG] Initializing.");
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// Fetch & load SVG
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console.info(`[SVG] Fetching "${props.url}..."`);
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const fetchResult = await fetch(props.url).then(
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fetchProgress({
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onProgress(progress) {
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loadedPercent.value = (progress as any).percentage;
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},
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})
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);
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const svgParsed = new DOMParser().parseFromString(await fetchResult.text(), "image/svg+xml") as Document;
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console.debug("[SVG] Loaded.");
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loadedPercent.value = 100;
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const svg = element.appendChild(svgParsed.firstElementChild as Element) as any;
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// Set document background
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const pageColor = svg.getElementById("base")?.attributes.getNamedItem("pagecolor");
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if (pageColor) {
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console.debug(`[SVG] Found pageColor attribute: ${pageColor.value}`);
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emit("setBackground", pageColor.value);
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}
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// PanZoom
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const pz = createPanZoom(element, {
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smoothScroll: false,
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minZoom: 0.05,
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maxZoom: 3637937,
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zoomSpeed: 0.05,
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zoomDoubleClickSpeed: 1,
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beforeMouseDown: () => {
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return panning.value;
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},
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beforeWheel: () => {
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return panning.value;
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},
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onDoubleClick: () => {
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if (!document.fullscreenElement) {
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console.debug("[SVG] Fullscreen requested.");
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document.body.requestFullscreen();
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} else {
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console.debug("[SVG] Fullscreen exited.");
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document.exitFullscreen();
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}
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return true;
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}
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});
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panzoom.value = pz;
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// Calculate SVG-unit bounding box, update transform
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pz.on("transform", function (_) {
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const transform = pz.getTransform();
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const currentRatio = svg.clientWidth * transform.scale / svg.viewBox.baseVal.width;
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bbox.x = transform.x / currentRatio * -1;
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bbox.y = transform.y / currentRatio * -1;
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bbox.w = window.innerWidth / currentRatio;
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bbox.h = window.innerHeight / currentRatio;
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bbox.z = transform.scale;
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});
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function panToElement(target: SVGRectElement, smooth: boolean) {
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console.debug(`[SVG] Panning to element: #${target.id}`);
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const transform = pz.getTransform();
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const currentRatio = svg.clientWidth * transform.scale / svg.viewBox.baseVal.width;
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const ratio = svg.clientWidth / svg.viewBox.baseVal.width;
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const targetScale = window.innerWidth / (target.width.baseVal.value * ratio);
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const svgTargetX = (target.x.baseVal.value + target.width.baseVal.value / 2) * currentRatio;
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const svgTargetY = (target.y.baseVal.value + target.height.baseVal.value / 2) * currentRatio;
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if (smooth) {
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panning.value = true;
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pz.smoothMoveTo(
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svgTargetX * -1 + window.innerWidth / 2,
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svgTargetY * -1 + window.innerHeight / 2,
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);
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setTimeout(() => {
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const finalTransform = pz.getTransform();
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pz.smoothZoomAbs(
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(svgTargetX + finalTransform.x),
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(svgTargetY + finalTransform.y),
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targetScale
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);
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setTimeout(() => {
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panning.value = false;
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}, 400);
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}, 400 * 2);
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} else {
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pz.moveTo(
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svgTargetX * -1 + window.innerWidth / 2,
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svgTargetY * -1 + window.innerHeight / 2,
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);
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pz.zoomAbs(window.innerWidth / 2, window.innerHeight / 2, targetScale);
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}
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}
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panToAnchor.value = (anchor: SVGRectElement) => {
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panToElement(anchor, true);
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};
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// Pan to start element
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const start = processStart(svg);
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if (start) {
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console.info("[SVG] Found start element.");
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panToElement(start, false);
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window.addEventListener("keydown", (ev) => {
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if (ev.key === " ") {
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panToElement(start, true);
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}
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});
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}
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// Anchors
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console.debug("[SVG] Processing anchors.");
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anchors.value = processAnchors(svg);
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console.info(`[SVG] Found ${anchors.value.length} anchors.`);
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// Links
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console.debug("[SVG] Processing hyperlinks.");
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const {anchor, hyper} = processHyperlinks(svg);
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console.info(`[SVG] Found ${anchor.length} anchor links and ${hyper.length} hyperlinks.`);
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anchor.forEach(([anchorId, element]) => {
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const anchor = anchors.value.find((a) => a.id == anchorId);
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if (!anchor) {
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console.error(`[SVG] Could not find anchor #${anchorId}!`);
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return;
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}
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element.addEventListener("click", () => {
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panToElement(anchor, true);
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});
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});
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// Audio areas
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console.debug("[SVG] Processing audio areas.");
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audioAreas.value = processAudio(svg);
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console.info(`[SVG] Found ${audioAreas.value.length} audio areas.`);
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// Videoscrolls
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console.debug("[SVG] Processing video scrolls.");
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scrolls.value = await processScrolls(svg);
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console.info(`[SVG] Found ${scrolls.value.length} video scrolls.`);
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// Debug Stats
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let stats: Stats | undefined;
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if (process.env.VUE_APP_DEMO) {
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console.info("[SVG] DEMO mode active, turning on stats & dev panel.");
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stats = new Stats();
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document.body.appendChild(stats.dom);
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} else {
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Array.from(document.body.getElementsByClassName("dev")).forEach((el) => {
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(el as HTMLElement).style.display = "none";
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});
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}
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// Animations: FPS Counter, Edge scrolling
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let mouse: MouseEvent | undefined;
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window.addEventListener("mousemove", (ev) => {
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mouse = ev;
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const transform = pz.getTransform();
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const currentRatio = svg.clientWidth * transform.scale / svg.viewBox.baseVal.width;
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mousePosition.x = (mouse.clientX - transform.x) / currentRatio;
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mousePosition.y = (mouse.clientY - transform.y) / currentRatio;
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});
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function animate() {
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if (stats) {
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stats.begin();
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}
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// Edge scrolling
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const MOVE_EDGE_X = window.innerWidth * .25;
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const MOVE_EDGE_Y = window.innerHeight * .25;
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const MAX_SPEED = 20;
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if (mouse && !panning.value && document.fullscreenElement) {
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let horizontalShift: number;
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let verticalShift: number;
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const transform = pz.getTransform();
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if (mouse.clientX < MOVE_EDGE_X || mouse.clientX > window.innerWidth - MOVE_EDGE_X) {
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const horizontalEdgeDistance =
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(mouse.clientX < window.innerWidth / 2) ? mouse.clientX : (mouse.clientX - window.innerWidth);
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const horizontalRatio = (MOVE_EDGE_X - Math.abs(horizontalEdgeDistance)) / MOVE_EDGE_X;
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const direction = mouse.clientX < MOVE_EDGE_X ? 1 : -1;
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horizontalShift = horizontalRatio * direction * MAX_SPEED;
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} else {
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horizontalShift = 0;
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}
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if (mouse.clientY < MOVE_EDGE_Y || mouse.clientY > window.innerHeight - MOVE_EDGE_Y) {
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const verticalEdgeDistance =
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(mouse.clientY < window.innerHeight / 2) ? mouse.clientY : (mouse.clientY - window.innerHeight);
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const verticalRatio = (MOVE_EDGE_Y - Math.abs(verticalEdgeDistance)) / MOVE_EDGE_Y;
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const direction = mouse.clientY < MOVE_EDGE_Y ? 1 : -1;
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verticalShift = verticalRatio * direction * MAX_SPEED;
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} else {
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verticalShift = 0;
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}
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if (horizontalShift || verticalShift) {
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pz.moveTo(transform!.x + horizontalShift, transform!.y + verticalShift);
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}
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}
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if (stats) {
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stats.end();
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}
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requestAnimationFrame(animate);
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}
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requestAnimationFrame(animate);
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});
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return {
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root,
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loadedPercent,
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panzoom,
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anchors,
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panToAnchor,
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scrolls,
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audioAreas,
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bbox,
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mousePosition
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};
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},
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});
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function processAnchors(document: XMLDocument): SVGRectElement[] {
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const result: SVGRectElement[] = [];
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Array.from(document.getElementsByTagName("rect"))
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.filter((el) => el.id.startsWith("anchor"))
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.forEach((anchor) => {
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console.debug(`[SVG/ANCHORS] Found anchor #${anchor.id}.`);
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anchor.classList.add("internal");
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result.push(anchor);
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});
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return result;
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}
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async function processScrolls(svg: XMLDocument): Promise<VideoScrollDef[]> {
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const ratio = (svg as any).clientWidth / (svg as any).viewBox.baseVal.width;
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return Promise.all(
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Array.from(svg.getElementsByTagName("image"))
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.filter((el) => Array.from(el.children).some((el) => el.tagName == "desc"))
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.map(async (el) => {
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const descNode = Array.from(el.children).find((el) => el.tagName == "desc");
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console.debug(`[SVG/VIDEOSCROLLS] Found video scroll #${el.id}: ${descNode?.textContent}`);
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const [directionString, filesURL] = descNode!.textContent!.split("\n");
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const directions: VideoScrollDirection[] = directionString.split(" ").map((direction) => {
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if (!Object.values(VideoScrollDirection).includes(direction as VideoScrollDirection)) {
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throw new Error(`Unknown direction string: "${direction}"`);
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}
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return direction as VideoScrollDirection;
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});
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console.debug(`[SVG/VIDEOSCROLLS] Fetching ${filesURL}...`);
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const fileFetch = await fetch(`content/${filesURL}`);
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const preURL = fileFetch.url.replace(/\/files.lst$/, "");
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const files = (await fileFetch.text()).split("\n").filter(Boolean).map((str) => `${preURL}/${str}`);
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let x = el.x.baseVal.value;
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let y = el.y.baseVal.value;
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let w = el.width.baseVal.value;
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let h = el.height.baseVal.value;
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let angle = 0;
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const transform = el.attributes.getNamedItem("transform");
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const rotateResult = /rotate\((-?[0-9.]+)\)/.exec(transform?.value || "");
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if (rotateResult) {
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angle = parseFloat(rotateResult[1]);
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const [ncx, ncy] = rotate(x + w / 2, y + h / 2, 0, 0, angle);
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x = ncx - w / 2;
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y = ncy - h / 2;
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}
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return {
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top: y * ratio,
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left: x * ratio,
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angle,
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width: w * ratio,
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height: h * ratio,
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directions,
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files
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};
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})
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);
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}
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function processAudio(svg: XMLDocument): AudioAreaDef[] {
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const circles: (SVGCircleElement | SVGEllipseElement)[] = Array.from(svg.getElementsByTagName("circle"));
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const ellipses: (SVGCircleElement | SVGEllipseElement)[] = Array.from(svg.getElementsByTagName("ellipse"));
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return circles.concat(ellipses)
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.filter((el) => Array.from(el.children).some((el) => el.tagName == "desc"))
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.map((el) => {
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const descNode = Array.from(el.children).find((el) => el.tagName == "desc");
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console.debug(`[SVG/AUDIOAREAS] Found audio area #${el.id}: ${descNode?.textContent}`);
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const audioSrc = descNode!.textContent!.trim();
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const radius = el.hasAttribute("r") ?
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(el as SVGCircleElement).r.baseVal.value :
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((el as SVGEllipseElement).rx.baseVal.value + (el as SVGEllipseElement).ry.baseVal.value) / 2;
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el.classList.add("internal");
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return {
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cx: el.cx.baseVal.value,
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cy: el.cy.baseVal.value,
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radius,
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src: `content/${audioSrc}`,
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};
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});
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}
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function processHyperlinks(svg: XMLDocument): { anchor: [string, SVGAElement][], hyper: SVGAElement[] } {
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const anchor: [string, SVGAElement][] = [];
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const hyper: SVGAElement[] = [];
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Array.from(svg.getElementsByTagName("a")).forEach((el) => {
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if (el.getAttribute("xlink:href")?.startsWith("anchor")) {
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anchor.push([el.getAttribute("xlink:href") as string, el as unknown as SVGAElement]);
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el.setAttribute("xlink:href", "#");
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} else {
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el.setAttribute("target", "_blank");
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hyper.push(el as unknown as SVGAElement);
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}
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});
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return {anchor, hyper};
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}
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function processStart(svg: XMLDocument): SVGRectElement | null {
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const start = svg.getElementById("start");
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if (start) {
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start.classList.add("internal");
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}
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return start as (SVGRectElement | null);
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}
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</script>
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<!-- Add "scoped" attribute to limit CSS to this component only -->
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<style>
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.svg-content svg {
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overflow: visible;
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}
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.svg-content svg .internal {
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visibility: hidden;
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}
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.loading-screen {
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position: fixed;
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top: 0;
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left: 0;
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width: 100vw;
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height: 100vh;
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background: black;
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transition: opacity 0.5s;
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opacity: 1;
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}
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.loading-screen.loaded {
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opacity: 0 !important;
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}
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.loading-bar {
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height: 6px;
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background: white;
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margin: calc(50vh - 3px) auto;
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transition: width 0.2s;
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}
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.devpanel {
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position: fixed;
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top: 0;
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right: 0;
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z-index: 999;
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color: white;
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background: #000000aa;
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border: 2px solid white;
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font-family: monospace;
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padding: 1em 2em;
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}
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.devpanel div {
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display: flex;
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justify-content: space-between;
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}
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.devpanel label {
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float: right;
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}
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.devpanel div span {
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margin: 0 .5em;
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}
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</style>
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