Example usage for javax.swing.text Document render

Introduction

In this page you can find the example usage for javax.swing.text Document render.

Prototype

public void render(Runnable r);

Source Link

Document

Allows the model to be safely rendered in the presence of concurrency, if the model supports being updated asynchronously.

Usage

From source file:netbeanstypescript.TSDeclarationFinder.java

@Override
public OffsetRange getReferenceSpan(final Document doc, final int caretOffset) {
    final OffsetRange[] tokenRange = new OffsetRange[1];
    doc.render(new Runnable() {
        @Override//from ww w.ja  v  a  2 s  . com
        public void run() {
            TokenSequence<?> ts = TokenHierarchy.get(doc).tokenSequence(JsTokenId.javascriptLanguage());
            int offsetWithinToken = ts.move(caretOffset);
            if (ts.moveNext()) {
                Token<?> tok = ts.token();
                if (possibleRefs.contains(tok.id().primaryCategory())) {
                    int start = caretOffset - offsetWithinToken;
                    tokenRange[0] = new OffsetRange(start, start + tok.length());
                    return;
                }
            }
            // If we're right between two tokens, check the previous
            if (offsetWithinToken == 0 && ts.movePrevious()) {
                Token<?> tok = ts.token();
                if (possibleRefs.contains(tok.id().primaryCategory())) {
                    tokenRange[0] = new OffsetRange(caretOffset - tok.length(), caretOffset);
                }
            }
        }
    });
    if (tokenRange[0] == null) {
        return OffsetRange.NONE;
    }

    // Now query the language service to see if this is actually a reference
    final AtomicBoolean isReference = new AtomicBoolean();
    class ReferenceSpanTask extends UserTask implements Runnable {
        @Override
        public void run() {
            try {
                ParserManager.parse(Collections.singleton(Source.create(doc)), this);
            } catch (ParseException e) {
                TSService.log.log(Level.WARNING, null, e);
            }
        }

        @Override
        public void run(ResultIterator ri) throws ParseException {
            // Calling ResultIterator#getParserResult() ensures latest snapshot pushed to server
            Object defs = TSService.call("getDefsAtPosition",
                    ri.getParserResult().getSnapshot().getSource().getFileObject(), caretOffset);
            isReference.set(defs != null);
        }
    }
    // Don't block the UI thread for too long in case server is busy
    RequestProcessor.Task task = RP.post(new ReferenceSpanTask());
    try {
        task.waitFinished(1000);
    } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
    } finally {
        task.cancel();
    }
    return isReference.get() ? tokenRange[0] : OffsetRange.NONE;
}

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From source file:org.debux.webmotion.netbeans.javacc.lexer.impl.LexerUtils.java

public static TokenSequence<? extends TokenId> getMostEmbeddedTokenSequence(final Document doc,
        final int offset, boolean runUnderLock) {
    final AtomicReference<TokenSequence<? extends TokenId>> ref = new AtomicReference<TokenSequence<? extends TokenId>>();
    Runnable r = new Runnable() {
        @Override/*from ww w . j  a va2s .com*/
        public void run() {
            TokenHierarchy th = TokenHierarchy.get(doc);
            List<TokenSequence<? extends TokenId>> sequences = th.embeddedTokenSequences(offset, false);
            if (sequences.isEmpty()) {
                //no embedding, return top level sequence;
                ref.set(th.tokenSequence());
            } else {
                ref.set(sequences.get(sequences.size() - 1)); //return the most embedded one
            }
        }
    };

    if (runUnderLock) {
        doc.render(r);
    } else {
        r.run();
    }

    return ref.get();
}

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