106 lines
3.2 KiB
TypeScript
106 lines
3.2 KiB
TypeScript
import { EditorState, Range } from "@codemirror/state";
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import { syntaxTree } from "@codemirror/language";
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import { Decoration, WidgetType } from "@codemirror/view";
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import { decoratorStateField } from "./util.ts";
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import type { Client } from "../client.ts";
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import { resolveAttachmentPath, resolvePath } from "$sb/lib/resolve.ts";
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class InlineImageWidget extends WidgetType {
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constructor(
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readonly url: string,
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readonly title: string,
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readonly dim: string | null,
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readonly client: Client,
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) {
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super();
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// console.log("Creating widget", url);
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}
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eq(other: InlineImageWidget) {
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return other.url === this.url && other.title === this.title &&
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other.dim === this.dim;
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}
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get estimatedHeight(): number {
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const cachedHeight = this.client.getCachedWidgetHeight(`image:${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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private getDimensions(dimensionsToParse: string) {
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const [, width, widthUnit = "px", height, heightUnit = "px"] =
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dimensionsToParse.match(/(\d*)(%)?x(\d*)(%)?/) ?? [];
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return { width, widthUnit, height, heightUnit };
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}
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toDOM() {
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const img = document.createElement("img");
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let url = this.url;
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url = resolvePath(this.client.currentPage, url, true);
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// console.log("Creating DOM", this.url);
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const cachedImageHeight = this.client.getCachedWidgetHeight(
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`image:${this.url}`,
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);
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img.onload = () => {
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// console.log("Loaded", this.url, "with height", img.height);
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if (img.height !== cachedImageHeight) {
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this.client.setCachedWidgetHeight(`image:${this.url}`, img.height);
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}
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};
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img.src = 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 (this.dim) {
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const { width, widthUnit, height, heightUnit } = this.getDimensions(
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this.dim,
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);
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img.style.height = height ? `${height}${heightUnit}` : "";
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img.style.width = width ? `${width}${widthUnit}` : "";
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} else 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(client: Client) {
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return decoratorStateField((state: EditorState) => {
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const widgets: Range<Decoration>[] = [];
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const imageRegex =
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/!\[(?<title>[^\]]*)\]\((?<url>\S+)(?:\s+=(?<dim>\d*%?x\d+%?|\d+%?x\d*%?))?\)/;
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syntaxTree(state).iterate({
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enter: (node) => {
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if (!["Image", "ImageWithSize"].includes(node.name)) {
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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, dim } = imageRexexResult.groups;
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if (url.indexOf("://") === -1 && !url.startsWith("/")) {
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url = resolveAttachmentPath(client.currentPage, 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, dim, client),
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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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