Function toggleAttributeOnSelection

src/static/js/ace2_inner.ts:1641–1689

(attributeName)

  editorInfo.ace_getAttributeOnSelection = getAttributeOnSelection;

  const toggleAttributeOnSelection = (attributeName) => {
    if (!(rep.selStart && rep.selEnd)) return;

    let selectionAllHasIt = true;
    const withIt = new AttributeMap(rep.apool).set(attributeName, 'true').toString();
    const withItRegex = new RegExp(`${withIt.replace(/\*/g, '\\*')}(\\*|$)`);

    const hasIt = (attribs) => withItRegex.test(attribs);

    const selStartLine = rep.selStart[0];
    const selEndLine = rep.selEnd[0];
    for (let n = selStartLine; n <= selEndLine; n++) {
      let indexIntoLine = 0;
      let selectionStartInLine = 0;
      if (documentAttributeManager.lineHasMarker(n)) {
        selectionStartInLine = 1; // ignore "*" used as line marker
      }
      let selectionEndInLine = rep.lines.atIndex(n).text.length; // exclude newline
      if (n === selStartLine) {
        selectionStartInLine = rep.selStart[1];
      }
      if (n === selEndLine) {
        selectionEndInLine = rep.selEnd[1];
      }
      for (const op of deserializeOps(rep.alines[n])) {
        const opStartInLine = indexIntoLine;
        const opEndInLine = opStartInLine + op.chars;
        if (!hasIt(op.attribs)) {
          // does op overlap selection?
          if (!(opEndInLine <= selectionStartInLine || opStartInLine >= selectionEndInLine)) {
            selectionAllHasIt = false;
            break;
          }
        }
        indexIntoLine = opEndInLine;
      }
      if (!selectionAllHasIt) {
        break;
      }
    }


    const attributeValue = selectionAllHasIt ? '' : 'true';
    documentAttributeManager.setAttributesOnRange(
        rep.selStart, rep.selEnd, [[attributeName, attributeValue]]);
    if (attribIsFormattingStyle(attributeName)) {
      updateStyleButtonState(attributeName, !selectionAllHasIt); // italic, bold, ...
    }
  };
  editorInfo.ace_toggleAttributeOnSelection = toggleAttributeOnSelection;

  const performDocumentReplaceSelection = (newText) => {