Find Text

Aspose.Words Product Family
1

Good Morning,
i have a question concerning Finding of Text within a Document for further Processing. I looked at the examples in the Docs. There the main purpose is, to replace text based on a Pattern.
What I need to do is, that i want to Search the Document based on a Pattern and at the specific point this pattern occurs, i need to do further processing, for example add a Picture at the place of a predefined Placeholder. My first implementation was, to simply loop the whole Document.

Is there a more comfortable Way to do this provided through the APIs?

best regards and Thanks
Rob

2

I just noticed, that the Custom ReplacingCallback is ment to fit to the problem i described. Somehow i overread this possibility at a first glance…

3

Hi Robert,

Thanks for your inquiry. Yes, please implement IReplacingCallback interface to achieve this. In case you have further inquires or need any help, please let us know.

Best regards,

4

Thanks Awais for your reply,
i tried the IReplacingCallback and played a little bit around. I now have a Question on this…
If i use a regular expression which i search for:

Pattern.compile("<(NAME|AGE)>([.^]*.)");

I search for e.g. My Name. In a Document. I now sometimes get not the match, as it seems to be splitted in multiple runs in the Document. Is there a Chance to set as option to search over multiple Nodes, like i would use the Find/Replace Function in Word itself?

best regards and thanks
Rob

5

Hi Rob,

Thanks for your inquiry. Please try executing the following code:

static class ReplaceEvaluatorFindAndReplace implements IReplacingCallback {
    public int replacing(ReplacingArgs e) throws Exception {
        Node currentNode = e.getMatchNode();

        // The first (and may be the only) run can contain text before the match,
        // in this case it is necessary to split the run.
        if (e.getMatchOffset() > 0)
            currentNode = SplitRun((Run) currentNode, e.getMatchOffset());

        // This array is used to store all nodes of the match for further removing.
        ArrayList runs = new ArrayList();
        // Find all runs that contain parts of the match string.
        int remainingLength = e.getMatch().group(0).length();
        while (
                (remainingLength > 0) &&
                        (currentNode != null) &&
                        (currentNode.getText().length() <= remainingLength)) {
            runs.add(currentNode);
            remainingLength = remainingLength - currentNode.getText().length();
            // Select the next Run node.
            // Have to loop because there could be other nodes such as BookmarkStart etc.
            do {
                currentNode = currentNode.getNextSibling();
            }
            while ((currentNode != null) && (currentNode.getNodeType() != NodeType.RUN));
        }

        // Split the last run that contains the match if there is any text left.
        if ((currentNode != null) && (remainingLength > 0)) {
            SplitRun((Run) currentNode, remainingLength);
            runs.add(currentNode);
        }

        DocumentBuilder builder = new DocumentBuilder((Document) e.getMatchNode().getDocument());
        builder.moveTo((Run) runs.get(runs.size() - 1));
        builder.write("new value");

        //Now remove all runs in the sequence.
        for (Run run : (Iterable<Run>) runs)
            run.remove();

        return ReplaceAction.SKIP;
    }
}

private static Run SplitRun(Run run, int position) throws Exception {

    Run afterRun = (Run) run.deepClone(true);
    afterRun.setText(run.getText().substring(position));
    run.setText(run.getText().substring(0, position));
    run.getParentNode().insertAfter(afterRun, run);
    return afterRun;
}

I hope, this helps.

Best regards,