91 lines
2.3 KiB
TypeScript
91 lines
2.3 KiB
TypeScript
import {
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Decoration,
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EditorState,
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Range,
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syntaxTree,
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WidgetType,
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} from "../deps.ts";
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import { decoratorStateField } from "./util.ts";
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import type { Space } from "../space.ts";
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import type { Client } from "../client.ts";
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class InlineImageWidget extends WidgetType {
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constructor(
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readonly url: string,
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readonly title: string,
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readonly space: Space,
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) {
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super();
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// console.log("Creating widget", url);
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}
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eq(other: InlineImageWidget) {
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return other.url === this.url && other.title === this.title;
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}
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get estimatedHeight(): number {
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const cachedHeight = this.space.getCachedImageHeight(this.url);
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// console.log("Estimated height requested", this.url, cachedHeight);
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return cachedHeight;
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}
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toDOM() {
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const img = document.createElement("img");
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// console.log("Creating DOM", this.url);
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const cachedImageHeight = this.space.getCachedImageHeight(this.url);
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img.onload = () => {
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// console.log("Loaded", this.url, "with height", img.height);
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if (img.height !== cachedImageHeight) {
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this.space.setCachedImageHeight(this.url, img.height);
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}
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};
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img.src = this.url;
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img.alt = this.title;
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img.title = this.title;
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img.style.display = "block";
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img.className = "sb-inline-img";
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if (cachedImageHeight > 0) {
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img.height = cachedImageHeight;
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}
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return img;
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}
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}
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export function inlineImagesPlugin(editor: Client) {
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return decoratorStateField((state: EditorState) => {
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const widgets: Range<Decoration>[] = [];
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const imageRegex = /!\[(?<title>[^\]]*)\]\((?<url>.+)\)/;
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syntaxTree(state).iterate({
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enter: (node) => {
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if (node.name !== "Image") {
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return;
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}
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const imageRexexResult = imageRegex.exec(
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state.sliceDoc(node.from, node.to),
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);
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if (imageRexexResult === null || !imageRexexResult.groups) {
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return;
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}
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let url = imageRexexResult.groups.url;
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const title = imageRexexResult.groups.title;
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if (url.indexOf("://") === -1) {
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url = decodeURI(url);
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}
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widgets.push(
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Decoration.widget({
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widget: new InlineImageWidget(url, title, editor.space),
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block: true,
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}).range(node.to),
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);
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},
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});
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return Decoration.set(widgets, true);
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});
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}
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