CssGenerator.java

package org.tessell.generators.css;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import joist.sourcegen.GClass;
import joist.sourcegen.GMethod;

import org.tessell.generators.Cleanup;

import com.google.gwt.core.ext.Generator;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.resources.css.ast.CssProperty.Value;

/** A utility class for creating a Java interface declaration for a given CSS file. */
public class CssGenerator extends AbstractCssGenerator {

  private final GClass cssInterface;

  public CssGenerator(final File inputCssFile, Cleanup cleanup, final String interfaceName, final File outputDirectory) {
    super(inputCssFile, outputDirectory, cleanup);
    cssInterface = new GClass(interfaceName).setInterface().baseClass(CssResource.class);
  }

  public void run() throws IOException {
    addMethods();
    markAndSaveIfChanged(cssInterface);
  }

  private void addMethods() {
    for (final Map.Entry<String, String> e : getClassNameToMethodName().entrySet()) {
      final String className = e.getKey();
      final String methodName = e.getValue();
      if (className.equals("*")) {
        continue; // skip @external *; declarations
      }
      final GMethod m = cssInterface.getMethod(methodName).returnType(String.class);
      if (!methodName.equals(className)) {
        m.addAnnotation("@ClassName(\"{}\")", Generator.escape(className));
      }
    }
    for (final Map.Entry<String, Value> def : getDefs().entrySet()) {
      // need stricter matching
      if (def.getValue().toString().endsWith("px")) {
        cssInterface.getMethod(def.getKey()).returnType(int.class);
      }
    }
  }
}