Replace tribute with text-expander-element for textarea

Author: silverwind

package-lock.json

@@ -13,6 +13,7 @@
     "@citation-js/plugin-software-formats": "0.6.1",
     "@claviska/jquery-minicolors": "2.3.6",
     "@github/markdown-toolbar-element": "2.1.1",
+    "@github/text-expander-element": "2.3.0",
     "@mcaptcha/vanilla-glue": "0.1.0-alpha-3",
     "@primer/octicons": "18.3.0",
     "@vue/compiler-sfc": "3.2.47",

package.json

@@ -39,7 +39,9 @@ Template Attributes:
 				<span class="markdown-toolbar-button markdown-switch-easymde">{{svg "octicon-arrow-switch"}}</span>
 			</div>
 		</markdown-toolbar>
-		<textarea class="markdown-text-editor js-quick-submit" name="{{.TextareaName}}" placeholder="{{.TextareaPlaceholder}}">{{.TextareaContent}}</textarea>
+		<text-expander keys=": @">
+			<textarea class="markdown-text-editor js-quick-submit" name="{{.TextareaName}}" placeholder="{{.TextareaPlaceholder}}">{{.TextareaContent}}</textarea>
+		</text-expander>
 	</div>
 	<div class="ui tab markup" data-tab-panel="markdown-previewer">
 		{{.locale.Tr "loading"}}

templates/shared/combomarkdowneditor.tmpl

@@ -30,3 +30,44 @@
 .combo-markdown-editor .CodeMirror-scroll {
   max-height: calc(100vh - 200px);
 }
+
+text-expander {
+  display: block;
+  position: relative;
+}
+
+text-expander .suggestions {
+  position: absolute;
+  min-width: 180px;
+  padding: 0;
+  margin-top: 24px;
+  list-style: none;
+  background: var(--color-box-body);
+  border-radius: var(--border-radius);
+  border: 1px solid var(--color-secondary);
+  box-shadow: 0 .5rem 1rem var(--color-shadow);
+}
+
+text-expander .suggestions li {
+  display: block;
+  cursor: pointer;
+  padding: 4px 8px;
+  font-weight: 500;
+}
+
+text-expander .suggestions li + li {
+  border-top: 1px solid var(--color-secondary);
+}
+
+text-expander .suggestions li:first-child {
+  border-radius: var(--border-radius) var(--border-radius) 0 0;
+}
+
+text-expander .suggestions li:last-child {
+  border-radius: 0 0 var(--border-radius) var(--border-radius);
+}
+
+text-expander li[aria-selected="true"] {
+  background: var(--color-primary);
+  color: var(--color-primary-contrast);
+}

web_src/css/editor-markdown.css

@@ -1,11 +1,13 @@
 import '@github/markdown-toolbar-element';
+import '@github/text-expander-element';
 import $ from 'jquery';
 import {attachTribute} from '../tribute.js';
 import {hideElem, showElem, autosize} from '../../utils/dom.js';
 import {initEasyMDEImagePaste, initTextareaImagePaste} from './ImagePaste.js';
 import {initMarkupContent} from '../../markup/content.js';
 import {handleGlobalEnterQuickSubmit} from './QuickSubmit.js';
 import {attachRefIssueContextPopup} from '../contextpopup.js';
+import {emojiKeys, emojiString} from '../emoji.js';
 
 let elementIdCounter = 0;
 
@@ -43,11 +45,9 @@ class ComboMarkdownEditor {
 
     this.setupTab();
     this.setupDropzone();
-
+    this.setupExpander();
     this.setupTextarea();
 
-    await attachTribute(this.textarea, {mentions: true, emoji: true});
-
     if (this.userPreferredEditor === 'easymde') {
       await this.switchToEasyMDE();
     }
@@ -83,6 +83,40 @@ class ComboMarkdownEditor {
     }
   }
 
+  setupExpander() {
+    const expander = this.container.querySelector('text-expander');
+    expander?.addEventListener('text-expander-change', ({detail: {key, provide, text}}) => {
+      if (key === ':') {
+        const ul = document.createElement('ul');
+        ul.classList.add('suggestions');
+
+        const matches = [];
+        for (const name of emojiKeys) {
+          if (name.includes(text)) {
+            matches.push(name);
+            if (matches.length > 5) break;
+          }
+        }
+
+        for (const name of matches) {
+          const emoji = emojiString(name);
+          const li = document.createElement('li');
+          li.setAttribute('role', 'option');
+          li.setAttribute('data-value', emoji);
+          li.textContent = `${emoji} :${name}:`;
+          ul.append(li);
+        }
+
+        provide(Promise.resolve({matched: true, fragment: ul}));
+      }
+    });
+    expander?.addEventListener('text-expander-value', ({detail}) => {
+      if (detail?.key === ':' && detail?.item) {
+        detail.value = detail.item.getAttribute('data-value');
+      }
+    });
+  }
+
   setupDropzone() {
     const dropzoneParentContainer = this.container.getAttribute('data-dropzone-parent-container');
     if (dropzoneParentContainer) {