Examples with StructuredDocumentRegionHandlerExtension org.eclipse.wst.sse.core.internal.ltk.parser.StructuredDocumentRegionHandlerExtension used on opensource projects

Example 1 with StructuredDocumentRegionHandlerExtension

use of org.eclipse.wst.sse.core.internal.ltk.parser.StructuredDocumentRegionHandlerExtension in project webtools.sourceediting by eclipse.

the class AbstractModelLoader method transformInstance.

/**
 * this work is done better elsewhere, but done here for this version to
 * reduce changes. especially since the need for it should go away once we
 * no longer need to re-use old document instance.
 */
private void transformInstance(IStructuredDocument oldInstance, IStructuredDocument newInstance) {
    /**
     * https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=4920
     *
     * JSP taglib support broken, correct by duplicating extended setup
     * information (BlockTagParser extension,
     * StructuredDocumentRegionParser extensions)
     */
    RegionParser oldParser = oldInstance.getParser();
    RegionParser newParser = newInstance.getParser().newInstance();
    // parser
    if (oldParser instanceof StructuredDocumentRegionParserExtension && newParser instanceof StructuredDocumentRegionParserExtension) {
        List oldHandlers = ((StructuredDocumentRegionParserExtension) oldParser).getStructuredDocumentRegionHandlers();
        for (int i = 0; i < oldHandlers.size(); i++) {
            StructuredDocumentRegionHandler handler = ((StructuredDocumentRegionHandler) oldHandlers.get(i));
            if (handler instanceof StructuredDocumentRegionHandlerExtension) {
            /**
             * Skip the transferring here, the handler will do this
             * after everything else but the source is transferred.
             */
            } else {
                ((StructuredDocumentRegionParser) oldParser).removeStructuredDocumentRegionHandler(handler);
                ((StructuredDocumentRegionParser) newParser).addStructuredDocumentRegionHandler(handler);
                handler.resetNodes();
            }
        }
    }
    // Add any global BlockMarkers to the new parser
    if (oldParser instanceof BlockTagParser && newParser instanceof BlockTagParser) {
        List oldBlockMarkers = ((BlockTagParser) oldParser).getBlockMarkers();
        for (int i = 0; i < oldBlockMarkers.size(); i++) {
            BlockMarker blockMarker = ((BlockMarker) oldBlockMarkers.get(i));
            if (blockMarker.isGlobal()) {
                ((BlockTagParser) newParser).addBlockMarker(blockMarker);
            }
        }
    }
    ((BasicStructuredDocument) oldInstance).setParser(newParser);
    ((BasicStructuredDocument) oldInstance).setReParser(newInstance.getReParser().newInstance());
    if (newInstance.getDocumentPartitioner() instanceof StructuredTextPartitioner) {
        StructuredTextPartitioner partitioner = null;
        if (oldInstance instanceof IDocumentExtension3 && newInstance instanceof IDocumentExtension3) {
            partitioner = ((StructuredTextPartitioner) ((IDocumentExtension3) newInstance).getDocumentPartitioner(IStructuredPartitioning.DEFAULT_STRUCTURED_PARTITIONING));
            if (partitioner != null) {
                partitioner = (StructuredTextPartitioner) partitioner.newInstance();
            }
            ((IDocumentExtension3) oldInstance).setDocumentPartitioner(IStructuredPartitioning.DEFAULT_STRUCTURED_PARTITIONING, partitioner);
        }
        if (partitioner == null) {
            partitioner = (StructuredTextPartitioner) ((StructuredTextPartitioner) newInstance.getDocumentPartitioner()).newInstance();
            oldInstance.setDocumentPartitioner(partitioner);
        }
        if (partitioner != null) {
            partitioner.connect(oldInstance);
        }
    }
    String existingLineDelimiter = null;
    try {
        existingLineDelimiter = newInstance.getLineDelimiter(0);
    } catch (BadLocationException e) {
        // if empty file, assume platform default
        // TODO: should be using user set preference, per content type?
        // $NON-NLS-1$
        existingLineDelimiter = System.getProperty("line.separator");
    }
    // $NON-NLS-1$);
    oldInstance.setLineDelimiter(existingLineDelimiter);
    if (newInstance.getEncodingMemento() != null) {
        oldInstance.setEncodingMemento((EncodingMemento) newInstance.getEncodingMemento().clone());
    }
    /**
     * https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=4920
     *
     * JSP taglib support broken, correct by duplicating extended setup
     * information (BlockTagParser extension,
     * StructuredDocumentRegionParser extensions)
     */
    if (oldParser instanceof StructuredDocumentRegionParserExtension && newParser instanceof StructuredDocumentRegionParserExtension) {
        List oldHandlers = ((StructuredDocumentRegionParserExtension) oldParser).getStructuredDocumentRegionHandlers();
        for (int i = 0; i < oldHandlers.size(); i++) {
            StructuredDocumentRegionHandler handler = ((StructuredDocumentRegionHandler) oldHandlers.get(i));
            if (handler instanceof StructuredDocumentRegionHandlerExtension) {
                StructuredDocumentRegionHandlerExtension handlerExtension = (StructuredDocumentRegionHandlerExtension) handler;
                handlerExtension.setStructuredDocument(oldInstance);
            }
        }
    }
    String holdString = newInstance.get();
    newInstance = null;
    oldInstance.set(holdString);
}