GssResourceSourceViewerConfiguration.java

package com.gwtplugins.gwt.eclipse.gss.model;

import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.formatter.IContentFormatter;
import org.eclipse.jface.text.formatter.MultiPassContentFormatter;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.wst.css.core.text.ICSSPartitions;
import org.eclipse.wst.css.ui.StructuredTextViewerConfigurationCSS;
import org.eclipse.wst.sse.core.text.IStructuredPartitions;

import com.gwtplugins.gwt.eclipse.gss.ExtractingGssFormattingStrategy;

/**
 * Source viewer configuration for CssResource CSS files.
 */
public class GssResourceSourceViewerConfiguration extends StructuredTextViewerConfigurationCSS {

  /*
   * Derived from StructuredTextViewerConfigurationCSS. We fix their corrupting formatting when the CSS is not
   * well-formed. This bug exists without any extra CssResource extensions, e.g. with "@media { b { } }".
   */
  @Override
  public IContentFormatter getContentFormatter(ISourceViewer sourceViewer) {
    IContentFormatter formatter = super.getContentFormatter(sourceViewer);
    // super was unable to create a formatter, probably because
    // sourceViewer does not have document set yet, so just create a
    // generic one
    if (!(formatter instanceof MultiPassContentFormatter)) {
      formatter = new MultiPassContentFormatter(getConfiguredDocumentPartitioning(sourceViewer), ICSSPartitions.STYLE);
    }

    ((MultiPassContentFormatter) formatter).setMasterStrategy(new ExtractingGssFormattingStrategy());

    return formatter;
  }

  /*
   * Derived from StructuredTextViewerConfigurationCSS. We fix their improper indentation in the code generated by their
   * proposals. This bug exists without any extra CssResource extensions, e.g. with "@media { b<ctrl-space> }".
   */
  @Override
  protected IContentAssistProcessor[] getContentAssistProcessors(ISourceViewer sourceViewer, String partitionType) {
    IContentAssistProcessor[] processors = super.getContentAssistProcessors(sourceViewer, partitionType);

    if ((partitionType == ICSSPartitions.STYLE) || (partitionType == IStructuredPartitions.UNKNOWN_PARTITION)) {
      processors = new IContentAssistProcessor[] { new IndentationFixingGssContentAssistProcessor() };
    }

    return processors;
  }

}