Eclipse - custom text when hovering over a marker

Question

I working on an Eclipse plugin and currently I am trying to make Eclipse (Luna) to show customized text when hovering over a marker. I know that I could achieve this by specifying the marker arguments, but I need to change the text dynamically, e.g:

I have already tried these approaches without success:

1) Having a custom

TextEditor

with custom

SourceViewerConfiguration

:

public class MyEditor extends TextEditor {



    public MyEditor() {

        setSourceViewerConfiguration(new SourceViewerConfiguration() {

            @Override

            public IAnnotationHover getAnnotationHover(ISourceViewer sourceViewer) {

                return new IAnnotationHover() {

                    @Override

                    public String getHoverInfo(ISourceViewer sv, int ln) {

                        return "Hello world!";

                    }

                };

            }

        });

    }

}

and the plugin.xml like this:

<extension

        point="org.eclipse.ui.editors">

    <editor

            id="test"

            name="MyEditor"

            extensions="c"

            class="foo.bar.editors.MyEditor">

    </editor>

</extension>

My method getHoverInfo is never called. Instead, the method getHoverInfo from the DefaultAnnotationHover is being called any time I open any *.c file and hover over the marker. I checked the available editors via the Eclipse->Preferences->General->Editors and the

MyEditor

is there.

2) Adding the custom annotation hover dynamically. I found here information that it is possible. So every time I open a "*.c" file, I have this code:

IPartListener2 partListener2 = new IPartListener2() {

    @Override

    public void partOpened(IWorkbenchPartReference partRef) {

            if ("org.eclipse.cdt.ui.editor.CEditor".equals(((EditorReference) partRef).getDescriptor().getId())) {

                CEditor currentCFileEditor = ((CEditor)((EditorReference) partRef).getEditor(false));

                currentCFileEditor.getViewer().setAnnotationHover(new IAnnotationHover() {

                    @Override

                    public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {

                        return "Hello world";

                    }

                });

            }

        }

But again, I was not successful - my

getHoverInfo

is not called at all.

Any idea what I am doing wrong?

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Answer 1

For those who have a similar problem - I have found a "hacky" solution. I have created my own class MyAwesomeHover:

public class MyAwesomeHover implements IAnnotationHover {
    @Override
    public String getHoverInfo(ISourceViewer sw, int ln) {
        return "Hey hoo"
    }   
}

And then I use the reflection to set MyAweseomeHover as the displayed AnnotationHover.

    Field hm= SourceViewer.class.getDeclaredField("fVerticalRulerHoveringController");
    hm.setAccessible(true);
    AnnotationBarHoverManager ma= (AnnotationBarHoverManager) hm.get(sourceViewer);
    Field ah= AnnotationBarHoverManager.class.getDeclaredField("fAnnotationHover");
    ah.setAccessible(true);
    ah.set(ma, MyAwesomeHover());

Eclipse - custom text when hovering over a marker

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