Question

A qustion about Eclipse PDE development: I write a small plugin for Eclipse and have the following
* an org.eclipse.ui.texteditor.ITextEditor
* a line number

How can I automatically jump to that line and mark it? It’s a pity that the API seems only to support offsets (see: ITextEditor.selectAndReveal()) within the document but no line numbers.

The best would be – although this doesn’t work:

ITextEditor editor = (ITextEditor)IDE.openEditor(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(), file, true );
editor.goto(line);
editor.markLine(line);

It this possible in some way? I did not find a solution

Answer 1

on the class DetailsView I found the following method.

private static void goToLine(IEditorPart editorPart, int lineNumber) {
  if (!(editorPart instanceof ITextEditor) || lineNumber <= 0) {
    return;
  }
  ITextEditor editor = (ITextEditor) editorPart;
  IDocument document = editor.getDocumentProvider().getDocument(
    editor.getEditorInput());
  if (document != null) {
    IRegion lineInfo = null;
    try {
      // line count internaly starts with 0, and not with 1 like in
      // GUI
      lineInfo = document.getLineInformation(lineNumber - 1);
    } catch (BadLocationException e) {
      // ignored because line number may not really exist in document,
      // we guess this...
    }
    if (lineInfo != null) {
      editor.selectAndReveal(lineInfo.getOffset(), lineInfo.getLength());
    }
  }
}