VintaSoft Tech Community

Code: Select all

function __searchText() {
    var imageIndex = 0;
    // get image viewer that is associated with web document viewer
    var imageViewer = _docViewer.get_ImageViewer();
    // get image collection that is associated with image viewer
    var images = imageViewer.get_Images();
    // get image
    var image = images.getImage(imageIndex);
    // get image metadata
    var imageMetadata = image.get_Metadata();
    // request text region of image
    imageMetadata.requestTextRegion(
        function (data) {
            // get text region of image
            var imageTextRegion = data.textRegion;

            // create regular expresion for text search
            var regExp = new RegExp("SDK", "gi");
            // search text "SDK" on image
            var searchedTextRegions = imageTextRegion.searchText(regExp, "CurrentPage");
            // for each search result
            for (var i = 0; i < searchedTextRegions.length; i++) {
                // scroll to the text region in image viewer
                __scrollToTextRegion(imageViewer, image, searchedTextRegions[i].region);
            }
        },
        function (data) {
            alert("Error requesting text region.");
        });
}

function __scrollToTextRegion(imageViewer, image, region) {
    var selectedRegions = region.get_SelectionRegions();
    var leftTopPoint = selectedRegions[0][0];
    var rightBottomPoint = selectedRegions[0][2];

    // get the center point, in text region space, of text region
    var centerPoint = { x: (leftTopPoint.x + rightBottomPoint.x) / 2, y: (leftTopPoint.y + rightBottomPoint.y) / 2 };

    // get transform from text space to the image space
    var transform = region.getTransformFromTextToImageSpace(image.get_Resolution());

    // transform point from the text space to the image space
    var pointInImageSpace = transform.transformPoint(centerPoint);

    // scroll to the text region on image in image viewer
    imageViewer.scrollToImagePoint(pointInImageSpace.x, pointInImageSpace.y);

    // get TextSelectionTool used in web document viewer
    var textSelectionTool = _docViewer.getVisualToolById("TextSelectionTool");
    // select text on image using the TextSelectionTool
    textSelectionTool.set_SelectedRegion(region);
}