add excalidraw_embed into base repo (#2040)

Co-authored-by: Lipis <lipiridis@gmail.com>

src/excalidraw-embed/.gitignore

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+node_modules
+dist

src/excalidraw-embed/index.tsx

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+import React, { useEffect } from "react";
+
+import { InitializeApp } from "../components/InitializeApp";
+import App from "../components/App";
+
+import "../css/app.scss";
+import "../css/styles.scss";
+
+import { ExcalidrawProps } from "../types";
+import { IsMobileProvider } from "../is-mobile";
+
+const Excalidraw = React.memo(
+  (props: ExcalidrawProps) => {
+    const {
+      width,
+      height,
+      onChange,
+      initialData,
+      user,
+      onUsernameChange,
+    } = props;
+
+    useEffect(() => {
+      // Block pinch-zooming on iOS outside of the content area
+      const handleTouchMove = (event: TouchEvent) => {
+        // @ts-ignore
+        if (typeof event.scale === "number" && event.scale !== 1) {
+          event.preventDefault();
+        }
+      };
+
+      document.addEventListener("touchmove", handleTouchMove, {
+        passive: false,
+      });
+
+      return () => {
+        document.removeEventListener("touchmove", handleTouchMove);
+      };
+    }, []);
+
+    return (
+      <InitializeApp>
+        <IsMobileProvider>
+          <App
+            width={width}
+            height={height}
+            onChange={onChange}
+            initialData={initialData}
+            user={user}
+            onUsernameChange={onUsernameChange}
+          />
+        </IsMobileProvider>
+      </InitializeApp>
+    );
+  },
+  (prevProps: ExcalidrawProps, nextProps: ExcalidrawProps) => {
+    const { initialData: prevInitialData, user: prevUser, ...prev } = prevProps;
+    const { initialData: nextInitialData, user: nextUser, ...next } = nextProps;
+
+    const prevKeys = Object.keys(prevProps) as (keyof typeof prev)[];
+    const nextKeys = Object.keys(nextProps) as (keyof typeof next)[];
+
+    return (
+      prevUser?.name === nextUser?.name &&
+      prevKeys.length === nextKeys.length &&
+      prevKeys.every((key) => prev[key] === next[key])
+    );
+  },
+);
+
+export default Excalidraw;

src/excalidraw-embed/package.json

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+{
+  "name": "@excalidraw/excalidraw",
+  "version": "0.7.0",
+  "main": "dist/excalidraw.min.js",
+  "files": [
+    "dist/*"
+  ],
+  "description": "Excalidraw as a React component",
+  "license": "MIT",
+  "keywords": [
+    "excalidraw",
+    "excalidraw-embed",
+    "react",
+    "npm",
+    "npm excalidraw"
+  ],
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not ie <= 11",
+      "not op_mini all",
+      "not safari < 12",
+      "not kaios <= 2.5",
+      "not edge < 79",
+      "not chrome < 70",
+      "not and_uc < 13",
+      "not samsung < 10"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  },
+  "peerDependencies": {
+    "react": "16.13.1",
+    "react-dom": "16.13.1"
+  },
+  "devDependencies": {
+    "@babel/core": "7.9.0",
+    "@babel/plugin-transform-arrow-functions": "7.8.3",
+    "@babel/plugin-transform-async-to-generator": "7.8.3",
+    "@babel/plugin-transform-typescript": "7.9.4",
+    "@babel/preset-env": "7.9.5",
+    "@babel/preset-react": "7.9.4",
+    "@babel/preset-typescript": "7.9.0",
+    "babel-loader": "8.1.0",
+    "babel-plugin-transform-class-properties": "6.24.1",
+    "cross-env": "7.0.2",
+    "css-loader": "3.5.2",
+    "file-loader": "6.0.0",
+    "mini-css-extract-plugin": "0.8.0",
+    "sass-loader": "8.0.2",
+    "terser-webpack-plugin": "2.3.5",
+    "ts-loader": "7.0.0",
+    "webpack": "4.42.0",
+    "webpack-cli": "3.3.11"
+  },
+  "bugs": "https://github.com/excalidraw/excalidraw/issues",
+  "repository": "https://github.com/excalidraw/excalidraw",
+  "scripts": {
+    "build:umd": "cross-env NODE_ENV=production webpack --config webpack.prod.config.js",
+    "pack": "npm run build:umd && npm pack"
+  }
+}

src/excalidraw-embed/tsconfig.prod.json

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+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "es2015",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "jsx": "react"
+  }
+}

src/excalidraw-embed/webpack.prod.config.js

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+const path = require("path");
+const webpack = require("webpack");
+const MiniCssExtractPlugin = require("mini-css-extract-plugin");
+const TerserPlugin = require("terser-webpack-plugin");
+
+module.exports = {
+  mode: "production",
+  entry: {
+    "excalidraw.min": "./index.tsx",
+  },
+  output: {
+    path: path.resolve(__dirname, "dist"),
+    library: "Excalidraw",
+    libraryTarget: "umd",
+    filename: "[name].js",
+  },
+  resolve: {
+    extensions: [".js", ".ts", ".tsx", ".css", ".scss"],
+  },
+  module: {
+    rules: [
+      {
+        test: /\.(sa|sc|c)ss$/,
+        exclude: /node_modules/,
+        use: [
+          MiniCssExtractPlugin.loader,
+          { loader: "css-loader" },
+          "sass-loader",
+        ],
+      },
+      {
+        test: /\.(ts|tsx|js|jsx|mjs)$/,
+        exclude: /node_modules\/(?!(roughjs|socket.io-client|browser-nativefs)\/).*/,
+        use: [
+          {
+            loader: "ts-loader",
+            options: {
+              transpileOnly: true,
+              configFile: path.resolve(__dirname, "tsconfig.prod.json"),
+            },
+          },
+          {
+            loader: "babel-loader",
+            options: {
+              presets: [
+                "@babel/preset-env",
+                "@babel/preset-react",
+                "@babel/preset-typescript",
+              ],
+              plugins: [
+                "@babel/plugin-proposal-object-rest-spread",
+                "@babel/plugin-transform-arrow-functions",
+                "transform-class-properties",
+                "@babel/plugin-transform-async-to-generator",
+              ],
+            },
+          },
+        ],
+      },
+      {
+        test: /\.(woff|woff2|eot|ttf|otf)$/,
+        use: [
+          {
+            loader: "file-loader",
+            options: {
+              name: "[name].[ext]",
+            },
+          },
+        ],
+      },
+    ],
+  },
+  optimization: {
+    minimize: true,
+    minimizer: [
+      new TerserPlugin({
+        test: /\.js($|\?)/i,
+      }),
+      new webpack.optimize.LimitChunkCountPlugin({
+        maxChunks: 1,
+      }),
+    ],
+  },
+  plugins: [new MiniCssExtractPlugin({ filename: "[name].css" })],
+  externals: {
+    react: {
+      root: "React",
+      commonjs2: "react",
+      commonjs: "react",
+      amd: "react",
+    },
+    "react-dom": {
+      root: "ReactDOM",
+      commonjs2: "react-dom",
+      commonjs: "react-dom",
+      amd: "react-dom",
+    },
+  },
+};