286 lines
13 KiB
TypeScript
286 lines
13 KiB
TypeScript
import {abcRender} from "../markdown/abcRender";
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import {chartRender} from "../markdown/chartRender";
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import {codeRender} from "../markdown/codeRender";
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import {flowchartRender} from "../markdown/flowchartRender";
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import {getMarkdown} from "../markdown/getMarkdown";
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import {graphvizRender} from "../markdown/graphvizRender";
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import {highlightRender} from "../markdown/highlightRender";
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import {mathRender} from "../markdown/mathRender";
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import {mediaRender} from "../markdown/mediaRender";
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import {mermaidRender} from "../markdown/mermaidRender";
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import {markmapRender} from "../markdown/markmapRender";
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import {mindmapRender} from "../markdown/mindmapRender";
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import {plantumlRender} from "../markdown/plantumlRender";
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import {getEventName} from "../util/compatibility";
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import {hasClosestByClassName, hasClosestByMatchTag} from "../util/hasClosest";
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import {hasClosestByTag} from "../util/hasClosestByHeadings";
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import {setSelectionFocus} from "../util/selection";
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import {previewImage} from "./image";
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export class Preview {
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public element: HTMLElement;
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public previewElement: HTMLElement;
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private mdTimeoutId: number;
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constructor(vditor: IVditor) {
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this.element = document.createElement("div");
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this.element.className = `vditor-preview`;
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this.previewElement = document.createElement("div");
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this.previewElement.className = "vditor-reset";
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if (vditor.options.classes.preview) {
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this.previewElement.classList.add(vditor.options.classes.preview);
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}
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this.previewElement.style.maxWidth = vditor.options.preview.maxWidth + "px";
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this.previewElement.addEventListener("copy", (event: ClipboardEvent & { target: HTMLElement }) => {
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if (event.target.tagName === "TEXTAREA") {
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// https://github.com/Vanessa219/vditor/issues/901
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return;
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}
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const tempElement = document.createElement("div");
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tempElement.className = "vditor-reset";
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tempElement.appendChild(getSelection().getRangeAt(0).cloneContents());
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this.copyToX(vditor, tempElement, "default");
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event.preventDefault();
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});
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this.previewElement.addEventListener("click", (event: MouseEvent & { target: HTMLElement }) => {
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const spanElement = hasClosestByMatchTag(event.target, "SPAN");
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if (spanElement && hasClosestByClassName(spanElement, "vditor-toc")) {
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const headingElement =
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this.previewElement.querySelector("#" + spanElement.getAttribute("data-target-id")) as HTMLElement;
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if (headingElement) {
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this.element.scrollTop = headingElement.offsetTop;
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}
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return;
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}
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if (event.target.tagName === "A") {
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if (vditor.options.link.click) {
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vditor.options.link.click(event.target);
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} else if (vditor.options.link.isOpen) {
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window.open(event.target.getAttribute("href"));
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}
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event.preventDefault();
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return;
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}
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if (event.target.tagName === "IMG") {
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if (vditor.options.image.preview) {
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vditor.options.image.preview(event.target)
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} else if (vditor.options.image.isPreview) {
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previewImage(event.target as HTMLImageElement, vditor.options.lang, vditor.options.theme);
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}
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}
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});
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this.element.appendChild(this.previewElement);
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const actions = vditor.options.preview.actions;
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if (actions.length === 0) {
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return;
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}
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const actionElement = document.createElement("div");
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actionElement.className = "vditor-preview__action";
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const actionHtml: string[] = [];
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for (let i = 0; i < actions.length; i++) {
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const action = actions[i];
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if (typeof action === "object") {
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actionHtml.push(`<button type="button" data-type="${action.key}" class="${action.className}"${action.tooltip ? ` aria-label="${action.tooltip}"` : ""}">${action.text}</button>`);
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continue;
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}
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switch (action) {
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case "desktop":
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actionHtml.push(`<button type="button" class="vditor-preview__action--current" data-type="desktop">Desktop</button>`);
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break;
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case "tablet":
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actionHtml.push(`<button type="button" data-type="tablet">Tablet</button>`);
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break;
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case "mobile":
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actionHtml.push(`<button type="button" data-type="mobile">Mobile/Wechat</button>`);
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break;
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case "mp-wechat":
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actionHtml.push(`<button type="button" data-type="mp-wechat" class="vditor-tooltipped vditor-tooltipped__w" aria-label="复制到公众号"><svg><use xlink:href="#vditor-icon-mp-wechat"></use></svg></button>`);
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break;
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case "zhihu":
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actionHtml.push(`<button type="button" data-type="zhihu" class="vditor-tooltipped vditor-tooltipped__w" aria-label="复制到知乎"><svg><use xlink:href="#vditor-icon-zhihu"></use></svg></button>`);
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break;
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}
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}
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actionElement.innerHTML = actionHtml.join("");
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actionElement.addEventListener(getEventName(), (event) => {
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const btn = hasClosestByTag(event.target as HTMLElement, "BUTTON");
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if (!btn) {
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return;
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}
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const type = btn.getAttribute("data-type");
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const actionCustom = actions.find((w: IPreviewActionCustom) => w?.key === type) as IPreviewActionCustom;
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if (actionCustom) {
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actionCustom.click(type);
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return;
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}
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if (type === "mp-wechat" || type === "zhihu") {
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this.copyToX(vditor, this.previewElement.cloneNode(true) as HTMLElement, type);
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return;
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}
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if (type === "desktop") {
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this.previewElement.style.width = "auto";
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} else if (type === "tablet") {
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this.previewElement.style.width = "780px";
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} else {
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this.previewElement.style.width = "360px";
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}
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if (this.previewElement.scrollWidth > this.previewElement.parentElement.clientWidth) {
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this.previewElement.style.width = "auto";
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}
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this.render(vditor);
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actionElement.querySelectorAll("button").forEach((item) => {
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item.classList.remove("vditor-preview__action--current");
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});
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btn.classList.add("vditor-preview__action--current");
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});
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this.element.insertBefore(actionElement, this.previewElement);
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}
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public render(vditor: IVditor, value?: string) {
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clearTimeout(this.mdTimeoutId);
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if (this.element.style.display === "none") {
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if (this.element.getAttribute("data-type") === "renderPerformance") {
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vditor.tip.hide();
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}
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return;
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}
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if (value) {
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this.previewElement.innerHTML = value;
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return;
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}
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if (getMarkdown(vditor)
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.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, "") === "") {
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this.previewElement.innerHTML = "";
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return;
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}
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const renderStartTime = new Date().getTime();
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const markdownText = getMarkdown(vditor);
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this.mdTimeoutId = window.setTimeout(() => {
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if (vditor.options.preview.url) {
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const xhr = new XMLHttpRequest();
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xhr.open("POST", vditor.options.preview.url);
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xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
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xhr.onreadystatechange = () => {
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if (xhr.readyState === XMLHttpRequest.DONE) {
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if (xhr.status === 200) {
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const responseJSON = JSON.parse(xhr.responseText);
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if (responseJSON.code !== 0) {
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vditor.tip.show(responseJSON.msg);
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return;
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}
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if (vditor.options.preview.transform) {
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responseJSON.data = vditor.options.preview.transform(responseJSON.data);
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}
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this.previewElement.innerHTML = responseJSON.data;
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this.afterRender(vditor, renderStartTime);
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} else {
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let html = vditor.lute.Md2HTML(markdownText);
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if (vditor.options.preview.transform) {
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html = vditor.options.preview.transform(html);
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}
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this.previewElement.innerHTML = html;
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this.afterRender(vditor, renderStartTime);
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}
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}
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};
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xhr.send(JSON.stringify({markdownText}));
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} else {
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let html = vditor.lute.Md2HTML(markdownText);
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if (vditor.options.preview.transform) {
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html = vditor.options.preview.transform(html);
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}
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this.previewElement.innerHTML = html;
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this.afterRender(vditor, renderStartTime);
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}
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}, vditor.options.preview.delay);
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}
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private afterRender(vditor: IVditor, startTime: number) {
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if (vditor.options.preview.parse) {
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vditor.options.preview.parse(this.element);
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}
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const time = (new Date().getTime() - startTime);
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if ((new Date().getTime() - startTime) > 2600) {
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// https://github.com/b3log/vditor/issues/67
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vditor.tip.show(window.VditorI18n.performanceTip.replace("${x}", time.toString()));
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vditor.preview.element.setAttribute("data-type", "renderPerformance");
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} else if (vditor.preview.element.getAttribute("data-type") === "renderPerformance") {
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vditor.tip.hide();
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vditor.preview.element.removeAttribute("data-type");
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}
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const cmtFocusElement = vditor.preview.element.querySelector(".vditor-comment--focus");
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if (cmtFocusElement) {
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cmtFocusElement.classList.remove("vditor-comment--focus");
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}
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codeRender(vditor.preview.previewElement, vditor.options.preview.hljs);
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highlightRender(vditor.options.preview.hljs, vditor.preview.previewElement,
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vditor.options.cdn);
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mermaidRender(vditor.preview.previewElement, vditor.options.cdn, vditor.options.theme);
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markmapRender(vditor.preview.previewElement, vditor.options.cdn, vditor.options.theme);
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flowchartRender(vditor.preview.previewElement, vditor.options.cdn);
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graphvizRender(vditor.preview.previewElement, vditor.options.cdn);
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chartRender(vditor.preview.previewElement, vditor.options.cdn, vditor.options.theme);
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mindmapRender(vditor.preview.previewElement, vditor.options.cdn, vditor.options.theme);
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plantumlRender(vditor.preview.previewElement, vditor.options.cdn);
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abcRender(vditor.preview.previewElement, vditor.options.cdn);
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if (vditor.options.preview.render.media.enable) {
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mediaRender(vditor.preview.previewElement);
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}
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vditor.options.customRenders.forEach((item) => {
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item.render(vditor.preview.previewElement, vditor);
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})
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// toc render
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const editorElement = vditor.preview.element;
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let tocHTML = vditor.outline.render(vditor);
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if (tocHTML === "") {
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tocHTML = "[ToC]";
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}
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editorElement.querySelectorAll('[data-type="toc-block"]').forEach((item: HTMLElement) => {
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item.innerHTML = tocHTML;
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mathRender(item, {
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cdn: vditor.options.cdn,
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math: vditor.options.preview.math,
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});
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});
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mathRender(vditor.preview.previewElement, {
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cdn: vditor.options.cdn,
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math: vditor.options.preview.math,
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});
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}
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private copyToX(vditor: IVditor, copyElement: HTMLElement, type = "mp-wechat") {
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// fix math render
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if (type !== "zhihu") {
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copyElement.querySelectorAll(".katex-html .base").forEach((item: HTMLElement) => {
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item.style.display = "initial";
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});
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} else {
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copyElement.querySelectorAll(".language-math").forEach((item: HTMLElement) => {
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item.outerHTML = `<img class="Formula-image" data-eeimg="true" src="//www.zhihu.com/equation?tex=" alt="${item.getAttribute("data-math")}\\" style="display: block; margin: 0 auto; max-width: 100%;">`;
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});
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}
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// 防止背景色被粘贴到公众号中
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copyElement.style.backgroundColor = "#fff";
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// 代码背景
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copyElement.querySelectorAll("code").forEach((item) => {
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item.style.backgroundImage = "none";
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});
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this.element.append(copyElement);
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const range = copyElement.ownerDocument.createRange();
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range.selectNode(copyElement);
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setSelectionFocus(range);
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document.execCommand("copy");
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copyElement.remove();
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vditor.tip.show(['zhihu', 'mp-wechat'].includes(type) ? `已复制，可到${type === "zhihu" ? "知乎" : "微信公众号平台"}进行粘贴` : `已复制到剪切板`);
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}
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}
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