// Copyright (c) 2009 The Chromium Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

package org.chromium.debug.ui.editors;

import org.eclipse.jface.text.IDocument;

import org.eclipse.jface.text.ITextHover;

import org.eclipse.jface.text.TextAttribute;

import org.eclipse.jface.text.presentation.IPresentationReconciler;

import org.eclipse.jface.text.presentation.PresentationReconciler;

import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;

import org.eclipse.jface.text.rules.DefaultDamagerRepairer;

import org.eclipse.jface.text.rules.Token;

import org.eclipse.jface.text.source.ISourceViewer;

import org.eclipse.ui.editors.text.TextSourceViewerConfiguration;

/**

 * A JavaScript source viewer configuration.

 */

public class JsSourceViewerConfiguration extends TextSourceViewerConfiguration {

  private static class MultilineCommentScanner extends BufferedRuleBasedScanner {

    public MultilineCommentScanner(TextAttribute attr) {

      setDefaultReturnToken(new Token(attr));

    }

  }

  private static final String[] CONTENT_TYPES = new String[] {

      IDocument.DEFAULT_CONTENT_TYPE,

      JsPartitionScanner.JSDOC,

      JsPartitionScanner.MULTILINE_COMMENT

  };

  private final JsCodeScanner scanner = new JsCodeScanner();

  @Override

  public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType) {

    return new JsDebugTextHover();

  }

  @Override

  public IPresentationReconciler getPresentationReconciler(ISourceViewer sourceViewer) {

    PresentationReconciler pr = new PresentationReconciler();

    pr.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));

    setDamagerRepairer(pr, new DefaultDamagerRepairer(scanner), IDocument.DEFAULT_CONTENT_TYPE);

    setDamagerRepairer(

        pr, new DefaultDamagerRepairer(new MultilineCommentScanner(scanner.getCommentAttribute())),

        JsPartitionScanner.MULTILINE_COMMENT);

    setDamagerRepairer(

        pr, new DefaultDamagerRepairer(new MultilineCommentScanner(scanner.getJsDocAttribute())),

        JsPartitionScanner.JSDOC);

    return pr;

  }

  private void setDamagerRepairer(

      PresentationReconciler pr,

      DefaultDamagerRepairer damagerRepairer,

      String tokenType) {

    pr.setDamager(damagerRepairer, tokenType);

    pr.setRepairer(damagerRepairer, tokenType);

  }

  @Override

  public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) {

    return CONTENT_TYPES;

  }

}