How to get selected text under an annotation

[Matt Bojey]

Q: How can I get text under an annotation?

A:  Here is some code that should work.  It's adding .highlight at the end of the textSelected event name so that we can remove only this particular handler for the textSelected event.

function getSelectedText(annotation, callback) { 

    docViewer.on('textSelected.highlight', function(e, quads, text) {

        docViewer.off('textSelected.highlight');

        docViewer.clearSelection();

        callback(text);

    });

    var numQuads = annotation.Quads.length;

    var firstQuad = annotation.Quads[0].getPoints();

    var lastQuad = annotation.Quads[numQuads - 1].getPoints();

    var topLeft = {

        x: firstQuad.x1,

        y: firstQuad.y1,

        pageIndex: annotation.getPageNumber() - 1

    };

    var bottomRight = {

        x: lastQuad.x3,

        y: lastQuad.y3,

        pageIndex: annotation.getPageNumber() - 1

    };

    var textSelectTool = new Tools.TextSelectTool(docViewer);

    textSelectTool.select(topLeft, bottomRight);

}