Use Codemirror Hint feature for autocomplete

packages/bruno-app/src/components/SingleLineEditor/index.js

@@ -9,6 +9,35 @@ const SERVER_RENDERED = typeof navigator === 'undefined' || global['PREVENT_CODE
 
 if (!SERVER_RENDERED) {
   CodeMirror = require('codemirror');
+  CodeMirror.registerHelper('hint', 'anyword', (editor, options) => {
+    const word = /[\w$]+/;
+    const wordlist = (options && options.autocomplete) || [];
+    let cur = editor.getCursor(),
+      curLine = editor.getLine(cur.line);
+    let end = cur.ch,
+      start = end;
+    while (start && word.test(curLine.charAt(start - 1))) --start;
+    let curWord = start != end && curLine.slice(start, end);
+
+    const list = (options && options.list) || [];
+    const re = new RegExp(word.source, 'g');
+    for (let dir = -1; dir <= 1; dir += 2) {
+      let line = cur.line,
+        endLine = Math.min(Math.max(line + dir * 500, editor.firstLine()), editor.lastLine()) + dir;
+      for (; line != endLine; line += dir) {
+        let text = editor.getLine(line),
+          m;
+        while ((m = re.exec(text))) {
+          if (line == cur.line && curWord.length < 3) continue;
+          list.push(...wordlist.filter((el) => el.toLowerCase().startsWith(curWord.toLowerCase())));
+        }
+      }
+    }
+    return { list: [...new Set(list)], from: CodeMirror.Pos(cur.line, start), to: CodeMirror.Pos(cur.line, end) };
+  });
+  CodeMirror.commands.autocomplete = (cm, hint, options) => {
+    cm.showHint({ hint, ...options });
+  };
 }
 
 class SingleLineEditor extends Component {
@@ -73,6 +102,14 @@ class SingleLineEditor extends Component {
         Tab: () => {}
       }
     });
+    if (this.props.autocomplete) {
+      this.editor.on('keyup', (cm, event) => {
+        if (!cm.state.completionActive /*Enables keyboard navigation in autocomplete list*/ && event.keyCode != 13) {
+          /*Enter - do not open autocomplete list just after item has been selected in it*/
+          CodeMirror.commands.autocomplete(cm, CodeMirror.hint.anyword, { autocomplete: this.props.autocomplete });
+        }
+      });
+    }
     this.editor.setValue(this.props.value || '');
     this.editor.on('change', this._onEdit);
     this.addOverlay();