1 files changed, 332 insertions, 0 deletions
diff --git a/web_src/js/features/comp/ComboMarkdownEditor.ts b/web_src/js/features/comp/ComboMarkdownEditor.ts
new file mode 100644
index 0000000000..69fe34269b
--- /dev/null
+++ b/web_src/js/features/comp/ComboMarkdownEditor.ts
@@ -0,0 +1,332 @@
+import '@github/markdown-toolbar-element';
+import '@github/text-expander-element';
+import $ from 'jquery';
+import {attachTribute} from '../tribute.ts';
+import {hideElem, showElem, autosize, isElemVisible} from '../../utils/dom.ts';
+import {initEasyMDEPaste, initTextareaUpload} from './EditorUpload.ts';
+import {handleGlobalEnterQuickSubmit} from './QuickSubmit.ts';
+import {renderPreviewPanelContent} from '../repo-editor.ts';
+import {easyMDEToolbarActions} from './EasyMDEToolbarActions.ts';
+import {initTextExpander} from './TextExpander.ts';
+import {showErrorToast} from '../../modules/toast.ts';
+import {POST} from '../../modules/fetch.ts';
+import {initTextareaMarkdown} from './EditorMarkdown.ts';
+import {DropzoneCustomEventReloadFiles, initDropzone} from '../dropzone.ts';
+
+let elementIdCounter = 0;
+
+/**
+ * validate if the given textarea is non-empty.
+ * @param {HTMLElement} textarea - The textarea element to be validated.
+ * @returns {boolean} returns true if validation succeeded.
+ */
+export function validateTextareaNonEmpty(textarea) {
+  // When using EasyMDE, the original edit area HTML element is hidden, breaking HTML5 input validation.
+  // The workaround (https://github.com/sparksuite/simplemde-markdown-editor/issues/324) doesn't work with contenteditable, so we just show an alert.
+  if (!textarea.value) {
+    if (isElemVisible(textarea)) {
+      textarea.required = true;
+      const form = textarea.closest('form');
+      form?.reportValidity();
+    } else {
+      // The alert won't hurt users too much, because we are dropping the EasyMDE and the check only occurs in a few places.
+      showErrorToast('Require non-empty content');
+    }
+    return false;
+  }
+  return true;
+}
+
+class ComboMarkdownEditor {
+  constructor(container, options = {}) {
+    container._giteaComboMarkdownEditor = this;
+    this.options = options;
+    this.container = container;
+  }
+
+  async init() {
+    this.prepareEasyMDEToolbarActions();
+    this.setupContainer();
+    this.setupTab();
+    await this.setupDropzone(); // textarea depends on dropzone
+    this.setupTextarea();
+
+    await this.switchToUserPreference();
+  }
+
+  applyEditorHeights(el, heights) {
+    if (!heights) return;
+    if (heights.minHeight) el.style.minHeight = heights.minHeight;
+    if (heights.height) el.style.height = heights.height;
+    if (heights.maxHeight) el.style.maxHeight = heights.maxHeight;
+  }
+
+  setupContainer() {
+    initTextExpander(this.container.querySelector('text-expander'));
+    this.container.addEventListener('ce-editor-content-changed', (e) => this.options?.onContentChanged?.(this, e));
+  }
+
+  setupTextarea() {
+    this.textarea = this.container.querySelector('.markdown-text-editor');
+    this.textarea._giteaComboMarkdownEditor = this;
+    this.textarea.id = `_combo_markdown_editor_${String(elementIdCounter++)}`;
+    this.textarea.addEventListener('input', (e) => this.options?.onContentChanged?.(this, e));
+    this.applyEditorHeights(this.textarea, this.options.editorHeights);
+
+    if (this.textarea.getAttribute('data-disable-autosize') !== 'true') {
+      this.textareaAutosize = autosize(this.textarea, {viewportMarginBottom: 130});
+    }
+
+    this.textareaMarkdownToolbar = this.container.querySelector('markdown-toolbar');
+    this.textareaMarkdownToolbar.setAttribute('for', this.textarea.id);
+    for (const el of this.textareaMarkdownToolbar.querySelectorAll('.markdown-toolbar-button')) {
+      // upstream bug: The role code is never executed in base MarkdownButtonElement https://github.com/github/markdown-toolbar-element/issues/70
+      el.setAttribute('role', 'button');
+      // the editor usually is in a form, so the buttons should have "type=button", avoiding conflicting with the form's submit.
+      if (el.nodeName === 'BUTTON' && !el.getAttribute('type')) el.setAttribute('type', 'button');
+    }
+
+    const monospaceButton = this.container.querySelector('.markdown-switch-monospace');
+    const monospaceEnabled = localStorage?.getItem('markdown-editor-monospace') === 'true';
+    const monospaceText = monospaceButton.getAttribute(monospaceEnabled ? 'data-disable-text' : 'data-enable-text');
+    monospaceButton.setAttribute('data-tooltip-content', monospaceText);
+    monospaceButton.setAttribute('aria-checked', String(monospaceEnabled));
+
+    monospaceButton?.addEventListener('click', (e) => {
+      e.preventDefault();
+      const enabled = localStorage?.getItem('markdown-editor-monospace') !== 'true';
+      localStorage.setItem('markdown-editor-monospace', String(enabled));
+      this.textarea.classList.toggle('tw-font-mono', enabled);
+      const text = monospaceButton.getAttribute(enabled ? 'data-disable-text' : 'data-enable-text');
+      monospaceButton.setAttribute('data-tooltip-content', text);
+      monospaceButton.setAttribute('aria-checked', String(enabled));
+    });
+
+    const easymdeButton = this.container.querySelector('.markdown-switch-easymde');
+    easymdeButton?.addEventListener('click', async (e) => {
+      e.preventDefault();
+      this.userPreferredEditor = 'easymde';
+      await this.switchToEasyMDE();
+    });
+
+    initTextareaMarkdown(this.textarea);
+    if (this.dropzone) {
+      initTextareaUpload(this.textarea, this.dropzone);
+    }
+  }
+
+  async setupDropzone() {
+    const dropzoneParentContainer = this.container.getAttribute('data-dropzone-parent-container');
+    if (dropzoneParentContainer) {
+      this.dropzone = this.container.closest(this.container.getAttribute('data-dropzone-parent-container'))?.querySelector('.dropzone');
+      if (this.dropzone) this.attachedDropzoneInst = await initDropzone(this.dropzone);
+    }
+  }
+
+  dropzoneGetFiles() {
+    if (!this.dropzone) return null;
+    return Array.from(this.dropzone.querySelectorAll('.files [name=files]'), (el) => el.value);
+  }
+
+  dropzoneReloadFiles() {
+    if (!this.dropzone) return;
+    this.attachedDropzoneInst.emit(DropzoneCustomEventReloadFiles);
+  }
+
+  dropzoneSubmitReload() {
+    if (!this.dropzone) return;
+    this.attachedDropzoneInst.emit('submit');
+    this.attachedDropzoneInst.emit(DropzoneCustomEventReloadFiles);
+  }
+
+  setupTab() {
+    const tabs = this.container.querySelectorAll('.tabular.menu > .item');
+
+    // Fomantic Tab requires the "data-tab" to be globally unique.
+    // So here it uses our defined "data-tab-for" and "data-tab-panel" to generate the "data-tab" attribute for Fomantic.
+    this.tabEditor = Array.from(tabs).find((tab) => tab.getAttribute('data-tab-for') === 'markdown-writer');
+    this.tabPreviewer = Array.from(tabs).find((tab) => tab.getAttribute('data-tab-for') === 'markdown-previewer');
+    this.tabEditor.setAttribute('data-tab', `markdown-writer-${elementIdCounter}`);
+    this.tabPreviewer.setAttribute('data-tab', `markdown-previewer-${elementIdCounter}`);
+
+    const panelEditor = this.container.querySelector('.ui.tab[data-tab-panel="markdown-writer"]');
+    const panelPreviewer = this.container.querySelector('.ui.tab[data-tab-panel="markdown-previewer"]');
+    panelEditor.setAttribute('data-tab', `markdown-writer-${elementIdCounter}`);
+    panelPreviewer.setAttribute('data-tab', `markdown-previewer-${elementIdCounter}`);
+    elementIdCounter++;
+
+    this.tabEditor.addEventListener('click', () => {
+      requestAnimationFrame(() => {
+        this.focus();
+      });
+    });
+
+    $(tabs).tab();
+
+    this.previewUrl = this.tabPreviewer.getAttribute('data-preview-url');
+    this.previewContext = this.tabPreviewer.getAttribute('data-preview-context');
+    this.previewMode = this.options.previewMode ?? 'comment';
+    this.previewWiki = this.options.previewWiki ?? false;
+    this.tabPreviewer.addEventListener('click', async () => {
+      const formData = new FormData();
+      formData.append('mode', this.previewMode);
+      formData.append('context', this.previewContext);
+      formData.append('text', this.value());
+      formData.append('wiki', this.previewWiki);
+      const response = await POST(this.previewUrl, {data: formData});
+      const data = await response.text();
+      renderPreviewPanelContent($(panelPreviewer), data);
+    });
+  }
+
+  switchTabToEditor() {
+    this.tabEditor.click();
+  }
+
+  prepareEasyMDEToolbarActions() {
+    this.easyMDEToolbarDefault = [
+      'bold', 'italic', 'strikethrough', '|', 'heading-1', 'heading-2', 'heading-3',
+      'heading-bigger', 'heading-smaller', '|', 'code', 'quote', '|', 'gitea-checkbox-empty',
+      'gitea-checkbox-checked', '|', 'unordered-list', 'ordered-list', '|', 'link', 'image',
+      'table', 'horizontal-rule', '|', 'gitea-switch-to-textarea',
+    ];
+  }
+
+  parseEasyMDEToolbar(EasyMDE, actions) {
+    this.easyMDEToolbarActions = this.easyMDEToolbarActions || easyMDEToolbarActions(EasyMDE, this);
+    const processed = [];
+    for (const action of actions) {
+      const actionButton = this.easyMDEToolbarActions[action];
+      if (!actionButton) throw new Error(`Unknown EasyMDE toolbar action ${action}`);
+      processed.push(actionButton);
+    }
+    return processed;
+  }
+
+  async switchToUserPreference() {
+    if (this.userPreferredEditor === 'easymde') {
+      await this.switchToEasyMDE();
+    } else {
+      this.switchToTextarea();
+    }
+  }
+
+  switchToTextarea() {
+    if (!this.easyMDE) return;
+    showElem(this.textareaMarkdownToolbar);
+    if (this.easyMDE) {
+      this.easyMDE.toTextArea();
+      this.easyMDE = null;
+    }
+  }
+
+  async switchToEasyMDE() {
+    if (this.easyMDE) return;
+    // EasyMDE's CSS should be loaded via webpack config, otherwise our own styles can not overwrite the default styles.
+    const {default: EasyMDE} = await import(/* webpackChunkName: "easymde" */'easymde');
+    const easyMDEOpt = {
+      autoDownloadFontAwesome: false,
+      element: this.textarea,
+      forceSync: true,
+      renderingConfig: {singleLineBreaks: false},
+      indentWithTabs: false,
+      tabSize: 4,
+      spellChecker: false,
+      inputStyle: 'contenteditable', // nativeSpellcheck requires contenteditable
+      nativeSpellcheck: true,
+      ...this.options.easyMDEOptions,
+    };
+    easyMDEOpt.toolbar = this.parseEasyMDEToolbar(EasyMDE, easyMDEOpt.toolbar ?? this.easyMDEToolbarDefault);
+
+    this.easyMDE = new EasyMDE(easyMDEOpt);
+    this.easyMDE.codemirror.on('change', (...args) => {this.options?.onContentChanged?.(this, ...args)});
+    this.easyMDE.codemirror.setOption('extraKeys', {
+      'Cmd-Enter': (cm) => handleGlobalEnterQuickSubmit(cm.getTextArea()),
+      'Ctrl-Enter': (cm) => handleGlobalEnterQuickSubmit(cm.getTextArea()),
+      Enter: (cm) => {
+        const tributeContainer = document.querySelector('.tribute-container');
+        if (!tributeContainer || tributeContainer.style.display === 'none') {
+          cm.execCommand('newlineAndIndent');
+        }
+      },
+      Up: (cm) => {
+        const tributeContainer = document.querySelector('.tribute-container');
+        if (!tributeContainer || tributeContainer.style.display === 'none') {
+          return cm.execCommand('goLineUp');
+        }
+      },
+      Down: (cm) => {
+        const tributeContainer = document.querySelector('.tribute-container');
+        if (!tributeContainer || tributeContainer.style.display === 'none') {
+          return cm.execCommand('goLineDown');
+        }
+      },
+    });
+    this.applyEditorHeights(this.container.querySelector('.CodeMirror-scroll'), this.options.editorHeights);
+    await attachTribute(this.easyMDE.codemirror.getInputField(), {mentions: true, emoji: true});
+    if (this.dropzone) {
+      initEasyMDEPaste(this.easyMDE, this.dropzone);
+    }
+    hideElem(this.textareaMarkdownToolbar);
+  }
+
+  value(v = undefined) {
+    if (v === undefined) {
+      if (this.easyMDE) {
+        return this.easyMDE.value();
+      }
+      return this.textarea.value;
+    }
+
+    if (this.easyMDE) {
+      this.easyMDE.value(v);
+    } else {
+      this.textarea.value = v;
+    }
+    this.textareaAutosize?.resizeToFit();
+  }
+
+  focus() {
+    if (this.easyMDE) {
+      this.easyMDE.codemirror.focus();
+    } else {
+      this.textarea.focus();
+    }
+  }
+
+  moveCursorToEnd() {
+    this.textarea.focus();
+    this.textarea.setSelectionRange(this.textarea.value.length, this.textarea.value.length);
+    if (this.easyMDE) {
+      this.easyMDE.codemirror.focus();
+      this.easyMDE.codemirror.setCursor(this.easyMDE.codemirror.lineCount(), 0);
+    }
+  }
+
+  get userPreferredEditor() {
+    return window.localStorage.getItem(`markdown-editor-${this.options.useScene ?? 'default'}`);
+  }
+  set userPreferredEditor(s) {
+    window.localStorage.setItem(`markdown-editor-${this.options.useScene ?? 'default'}`, s);
+  }
+}
+
+export function getComboMarkdownEditor(el) {
+  if (el instanceof $) el = el[0];
+  return el?._giteaComboMarkdownEditor;
+}
+
+export async function initComboMarkdownEditor(container, options = {}) {
+  if (container instanceof $) {
+    if (container.length !== 1) {
+      throw new Error('initComboMarkdownEditor: container must be a single element');
+    }
+    container = container[0];
+  }
+  if (!container) {
+    throw new Error('initComboMarkdownEditor: container is null');
+  }
+  const editor = new ComboMarkdownEditor(container, options);
+  await editor.init();
+  return editor;
+}