import { WorkspaceWindow } from "obsidian"; import ExcalidrawPlugin from "src/main"; import { getAllWindowDocuments } from "./ObsidianUtils"; const STYLE_VARIABLES = ["--background-modifier-cover","--background-primary-alt","--background-secondary","--background-secondary-alt","--background-modifier-border","--text-normal","--text-muted","--text-accent","--text-accent-hover","--text-faint","--text-highlight-bg","--text-highlight-bg-active","--text-selection","--interactive-normal","--interactive-hover","--interactive-accent","--interactive-accent-hover","--scrollbar-bg","--scrollbar-thumb-bg","--scrollbar-active-thumb-bg"]; const EXCALIDRAW_CONTAINER_CLASS = "excalidraw__embeddable__outer"; export class StylesManager { private stylesMap = new Map(); private styleLight: string; private styleDark: string; private plugin: ExcalidrawPlugin; constructor(plugin: ExcalidrawPlugin) { this.plugin = plugin; plugin.app.workspace.onLayoutReady(async () => { await this.harvestStyles(); getAllWindowDocuments(plugin.app).forEach(doc => { this.copyPropertiesToTheme(doc); }) //initialize plugin.registerEvent( plugin.app.workspace.on("css-change", async () => { await this.harvestStyles(); getAllWindowDocuments(plugin.app).forEach(doc => { this.copyPropertiesToTheme(doc); }) }), ) plugin.registerEvent( plugin.app.workspace.on("window-open", (win: WorkspaceWindow, window: Window) => { this.stylesMap.set(win.doc, { light: document.head.querySelector(`style[id="excalidraw-embedded-light"]`), dark: document.head.querySelector(`style[id="excalidraw-embedded-dark"]`) }); //this.copyPropertiesToTheme(win.doc); }), ) plugin.registerEvent( plugin.app.workspace.on("window-open", (win: WorkspaceWindow, window: Window) => { this.stylesMap.delete(win.doc); }), ) }); } public unload() { for (const [doc, styleTags] of this.stylesMap) { doc.head.removeChild(styleTags.light); doc.head.removeChild(styleTags.dark); } } private async harvestStyles() { const body = document.body; const iframe:HTMLIFrameElement = document.createElement("iframe"); iframe.style.display = "none"; body.appendChild(iframe); const iframeLoadedPromise = new Promise((resolve) => { iframe.addEventListener("load", () => resolve()); }); const iframeDoc = iframe.contentWindow.document; const iframeWin = iframe.contentWindow; iframeDoc.open(); iframeDoc.write(`${document.head.innerHTML}`); iframeDoc.close(); await iframeLoadedPromise; const iframeBody = iframe.contentWindow.document.body; iframeBody.setAttribute("style", body.getAttribute("style")); iframeBody.setAttribute("class", body.getAttribute("class")); const setTheme = (theme: "theme-light" | "theme-dark") => { iframeBody.classList.remove("theme-light"); iframeBody.classList.remove("theme-dark"); iframeBody.classList.add(theme); } const getCSSVariables = (): string => { const computedStyles = iframeWin.getComputedStyle(iframeBody); const allVariables: {[key:string]:string} = {}; for (const variable of STYLE_VARIABLES) { allVariables[variable] = computedStyles.getPropertyValue(variable); } const cm = this.plugin.ea.getCM(computedStyles.getPropertyValue("--background-primary")); cm.alphaTo(0.9); allVariables["--background-primary"] = cm.stringHEX(); return Object.entries(allVariables) .map(([key, value]) => `${key}: ${value} !important;`) .join(" "); } setTheme("theme-light"); this.styleLight = getCSSVariables(); setTheme("theme-dark"); this.styleDark = getCSSVariables(); body.removeChild(iframe); } private copyPropertiesToTheme(doc: Document) { const styleTags = this.stylesMap.get(doc); if (styleTags) { styleTags.light.innerHTML = `.${EXCALIDRAW_CONTAINER_CLASS} .theme-light {\n${this.styleLight}\n}`; styleTags.dark.innerHTML = `.${EXCALIDRAW_CONTAINER_CLASS} .theme-dark {\n${this.styleDark}\n}`; } else { const lightStyleTag = doc.createElement("style"); lightStyleTag.type = "text/css"; lightStyleTag.setAttribute("id", "excalidraw-embedded-light"); lightStyleTag.innerHTML = `.${EXCALIDRAW_CONTAINER_CLASS} .theme-light {\n${this.styleLight}\n}`; doc.head.appendChild(lightStyleTag); const darkStyleTag = doc.createElement("style"); darkStyleTag.type = "text/css"; darkStyleTag.setAttribute("id", "excalidraw-embedded-dark"); darkStyleTag.innerHTML = `.${EXCALIDRAW_CONTAINER_CLASS} .theme-dark {\n${this.styleDark}\n}`; doc.head.appendChild(darkStyleTag); this.stylesMap.set(doc, {light: lightStyleTag, dark: darkStyleTag}); } } }