Merge pull request #11 from madeyoga/v0.2.0

Add image upload command

index.html

@@ -48,11 +48,23 @@ <h2>Preview:</h2>
 
   <script src="dist/chunmde.bundle.min.js"></script>
   <script>
-    let editor = new ChunMDE('editor-container', {
+    const { createChunEditor, createImageUploadPlugin } = Chun
+
+    const imageUploadPlugin = createImageUploadPlugin({
+      imageUploadUrl: "", 
+      imageFormats: ["image/jpg", "image/jpeg", "image/gif", "image/png", "image/bmp", "image/webp"],
+    })
+
+    const editor = createChunEditor({
       doc: initialContent.value,
       lineWrapping: true,
       indentWithTab: true,
+      toolbar: true,
     })
+    .use(imageUploadPlugin)
+    .mount("editor-container")
+
+    console.log(editor)
   </script>
 
 </body>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "chunmde",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Markdown editor based on codemirror 6",
   "main": "dist/chunmde.bundle.js",
   "type": "module",

src/components/Toolbar.ts

@@ -17,7 +17,7 @@ export class Toolbar {
   public buttonActions: ToolbarButton[]
   public dom: Element
 
-  constructor(editor: EditorView) {
+  constructor(editor: EditorView, toolbarItems: ((editor: EditorView) => HTMLElement)[] = []) {
     this.buttonActions = [
       {
         text: "Add heading text",
@@ -79,6 +79,10 @@ export class Toolbar {
       toolbarElement.appendChild(buttonElement)
     }
 
+    for (let createToolbarItem of toolbarItems) {
+      toolbarElement.appendChild(createToolbarItem(editor))
+    }
+
     this.dom = toolbarElement
   }
 }

src/index.ts

@@ -1,6 +1,6 @@
 import { markdown, markdownLanguage } from "@codemirror/lang-markdown"
 import { EditorState, EditorStateConfig } from '@codemirror/state'
-import { keymap, ViewUpdate, EditorView } from '@codemirror/view'
+import { keymap, ViewUpdate, EditorView, KeyBinding } from '@codemirror/view'
 import { basicSetup } from 'codemirror'
 import { indentWithTab } from "@codemirror/commands"
 import { italicKeyBinding } from './commands/Italic'
@@ -10,6 +10,8 @@ import { linkKeyBinding } from "./commands/Link"
 import { quoteKeyBinding } from "./commands/Quote"
 import { ulKeyBinding } from "./commands/BulletedList"
 import { Toolbar } from "./components/Toolbar"
+import IEditorPlugin from "./plugins/IEditorPlugin"
+import { createImageUploadPlugin } from "./plugins/ImageUpload"
 
 interface ChunInterface {
   dom: Element,
@@ -20,59 +22,39 @@ interface ChunInterface {
 
 interface ChunConfig extends EditorStateConfig {
   onUpdateListener?: (update: ViewUpdate) => void,
-  indentWithTab?: boolean,
-  lineWrapping?: boolean,
+  toolbar: boolean,
+  indentWithTab: boolean,
+  lineWrapping: boolean,
+  toolbarItems: ((editor: EditorView) => HTMLElement)[],
 }
 
-function ChunMDE(this: ChunInterface, containerId: string, customConfig?: ChunConfig) {
+const ChunMDE = function ChunMDE(this: ChunInterface, containerId: string, customConfig: ChunConfig = {
+  doc: "",
+  toolbar: true,
+  indentWithTab: true,
+  lineWrapping: false,
+  toolbarItems: []
+}) {
   const parentElement = document.getElementById(containerId) as Element
 
-  const defaultKeybinds = [
-    italicKeyBinding,
-    boldKeyBinding,
-    codeKeyBinding,
-    linkKeyBinding,
-    quoteKeyBinding,
-    ulKeyBinding,
-  ]
-
-  const defaultExtensions = [
-    keymap.of(defaultKeybinds),
-    markdown({ base: markdownLanguage }),
-    basicSetup,
-  ]
-
-  let config: EditorStateConfig = {
-    doc: "Start writing!",
-    extensions: defaultExtensions,
-  }
-
-  if (customConfig) {
-    if (customConfig.onUpdateListener) {
-      defaultExtensions.push(EditorView.updateListener.of(customConfig.onUpdateListener!))
-    }
-    if (customConfig.lineWrapping) {
-      defaultExtensions.push(EditorView.lineWrapping)
-    }
-    if (customConfig.indentWithTab) {
-      defaultExtensions.push(keymap.of([indentWithTab]))
-    }
-    config.doc = customConfig.doc ? customConfig.doc : config.doc
-    config.extensions = customConfig.extensions ? customConfig.extensions : defaultExtensions
+  const config: EditorStateConfig = {
+    doc: customConfig.doc,
+    extensions: customConfig.extensions,
   }
 
   /** CodeMirror6's EditorView */
   const editorView = new EditorView({
-    // parent: parentElement,
     state: EditorState.create(config)
   })
 
   parentElement.className += " chunmde-container"
 
   // toolbar
-  const toolbar = new Toolbar(editorView)
-
-  parentElement.appendChild(toolbar.dom)
+  if (customConfig.toolbar) {
+    const toolbar = new Toolbar(editorView, customConfig.toolbarItems)
+    parentElement.appendChild(toolbar.dom)
+    this.toolbar = toolbar
+  }
   parentElement.appendChild(editorView.dom)
 
   /** Shortcut to get the editor value */
@@ -81,14 +63,89 @@ function ChunMDE(this: ChunInterface, containerId: string, customConfig?: ChunCo
   }
 
   this.dom = parentElement
-  this.toolbar = toolbar
   this.editor = editorView
+} as any as { new (containerId: string, customConfig?: ChunConfig): ChunInterface; }
+
+interface IEditorBuilder {
+  use: (plugin: IEditorPlugin) => IEditorBuilder;
+  mount: (selector: string) => void;
+}
+
+export function createChunEditor(customConfig: ChunConfig = {
+  doc: "",
+  toolbar: true,
+  indentWithTab: true,
+  lineWrapping: false,
+  toolbarItems: [],
+}): IEditorBuilder {
+
+  const defaultKeybinds = [
+    italicKeyBinding,
+    boldKeyBinding,
+    codeKeyBinding,
+    linkKeyBinding,
+    quoteKeyBinding,
+    ulKeyBinding,
+  ]
+
+  const defaultExtensions = [
+    keymap.of(defaultKeybinds),
+    markdown({ base: markdownLanguage }),
+    basicSetup,
+  ]
+
+  const keybinds: KeyBinding[] = []
+  const toolbarItemDelegates: ((editor: EditorView) => HTMLButtonElement)[] = []
+
+  return {
+    use(plugin) {
+      if (plugin.keybind) {
+        keybinds.push(plugin.keybind)
+      }
+
+      if (plugin.createToolbarItem) {
+        toolbarItemDelegates.push(plugin.createToolbarItem)
+      }
+
+      return this
+    },
+    mount(selector) {
+
+      if (customConfig.onUpdateListener) {
+        defaultExtensions.push(EditorView.updateListener.of(customConfig.onUpdateListener!))
+      }
+      if (customConfig.lineWrapping) {
+        defaultExtensions.push(EditorView.lineWrapping)
+      }
+      if (customConfig.indentWithTab) {
+        keybinds.push(indentWithTab)
+      }
+
+      defaultExtensions.push(keymap.of(keybinds))
+      customConfig.extensions = defaultExtensions
+      customConfig.toolbarItems = toolbarItemDelegates
+
+      return new ChunMDE(selector, customConfig)
+    },
+  }
+}
+
+interface IGlobalChunEditor {
+  createChunEditor: () => IEditorBuilder,
+  createImageUploadPlugin: (imageUploadUrl: string, imageFormats: string[]) => IEditorPlugin,
 }
 
 declare global {
-  interface Window { ChunMDE: typeof ChunMDE; }
+  interface Window { ChunMDE: typeof ChunMDE; Chun: IGlobalChunEditor }
 }
 
-window.ChunMDE = ChunMDE;
+const Chun = { 
+  createChunEditor, 
+  createImageUploadPlugin,
+}
+
+window.ChunMDE = ChunMDE
+window.Chun = Chun;
+
+export default Chun;
 
-export default ChunMDE;

src/plugins/IEditorPlugin.ts

@@ -0,0 +1,9 @@
+import { EditorView } from "@codemirror/view";
+
+export default interface IEditorPlugin {
+  createToolbarItem?: (editor: EditorView) => HTMLButtonElement,
+  keybind?: {
+    key: string;
+    run: (view: EditorView) => boolean;
+  },
+}

src/plugins/ImageUpload.ts

@@ -0,0 +1,104 @@
+import { EditorView } from "@codemirror/view";
+import IEditorPlugin from "./IEditorPlugin"
+import { EditorSelection } from "@codemirror/state";
+import { trimSelection } from "../commands/Utilities";
+
+
+function wrapImageUrl(view: EditorView, imageUrl: string) {
+
+  const transaction = view.state.changeByRange((range) => {
+    const originalText = view.state.sliceDoc(range.from, range.to)
+    const { text, rangeFrom, rangeTo } = trimSelection(originalText, range)
+
+    const newText = `![${text}](${imageUrl})`
+
+    const transaction = {
+      changes: {
+        from: rangeFrom,
+        insert: newText,
+        to: rangeTo,
+      },
+      range: EditorSelection.range(rangeFrom + 2, rangeFrom + 2 + text.length),
+    }
+
+    return transaction
+  })
+
+  view.dispatch(transaction)
+  return 
+}
+
+
+export const createImageUploadPlugin: (config: any) => IEditorPlugin = (
+  config: any = {
+    imageUploadUrl: "",
+    imageFormats: ["image/jpg", "image/jpeg", "image/gif", "image/png", "image/bmp", "image/webp"],
+    csrfToken: "",
+    csrfFieldName: "",
+  }
+) => {
+
+  return {
+    createToolbarItem: (editor: EditorView) => {
+
+      const fileInput = document.createElement("input")
+      fileInput.type = "file"
+      fileInput.style.display = "none";
+
+      fileInput.setAttribute("accept", config.imageFormats.join(","))
+      fileInput.addEventListener("change", async (event) => {
+        const files = (event.target as HTMLInputElement).files
+        if (files && files[0]) {
+          const formData = new FormData();
+
+          formData.append('image', files[0]);
+
+          if (config.csrfFieldName && config.csrfToken) {
+            formData.append(config.csrfFieldName, config.csrfToken)
+          }
+
+          const resp = await fetch(config.imageUploadUrl, {
+            method: "POST",
+            body: formData,
+          })
+
+          if (resp.ok) {
+            const obj = await resp.json()
+            wrapImageUrl(editor, obj.url)
+          }
+          else {
+            const text = await resp.text()
+            alert("Error uploading image: " + resp.status + resp.statusText + text)
+          }
+        }
+      })
+
+      const icon = document.createElement("iconify-icon")
+      icon.className += "iconify "
+      icon.setAttribute("icon", "mdi:image-outline")
+      icon.setAttribute("inline", "false")
+      icon.setAttribute("width", "16")
+      icon.setAttribute("height", "16")
+
+      const buttonElement = document.createElement("button")
+      buttonElement.appendChild(icon)
+      buttonElement.setAttribute("alt", "Select and upload an image")
+      buttonElement.setAttribute("title", "Select and upload an image")
+      buttonElement.setAttribute("type", "button")
+      buttonElement.addEventListener("click", () => {
+        fileInput.click()
+      })
+
+      buttonElement.appendChild(fileInput)
+
+      return buttonElement
+    },
+    // keybind: {
+    //   key: "",
+    //   run: (editor) => {
+    //     fileInput.click()
+    //     return true
+    //   },
+    // }
+  }
+}