java/compiler/forms-compiler/src/com/intellij/uiDesigner/compiler/FontPropertyCodeGenerator.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.uiDesigner.compiler;

import com.intellij.compiler.instrumentation.InstrumentationClassFinder;
import com.intellij.uiDesigner.lw.FontDescriptor;
import com.intellij.uiDesigner.lw.LwComponent;
import com.intellij.uiDesigner.lw.LwIntrospectedProperty;
import org.jetbrains.org.objectweb.asm.Type;
import org.jetbrains.org.objectweb.asm.commons.GeneratorAdapter;
import org.jetbrains.org.objectweb.asm.commons.Method;

import java.awt.*;

/**
 * @author yole
 * @noinspection HardCodedStringLiteral
 */
public class FontPropertyCodeGenerator extends PropertyCodeGenerator {
  private static final Type ourFontType = Type.getType(Font.class);
  private static final Type ourUIManagerType = Type.getType("Ljavax/swing/UIManager;");
  private static final Type ourObjectType = Type.getType(Object.class);
  private static final Type ourStringType = Type.getType(String.class);

  private static final Method ourInitMethod = Method.getMethod("void <init>(java.lang.String,int,int)");
  private static final Method ourUIManagerGetFontMethod = new Method("getFont", ourFontType, new Type[] { ourObjectType } );
  private static final Method ourGetNameMethod = new Method("getName", ourStringType, new Type[0] );
  private static final Method ourGetSizeMethod = new Method("getSize", Type.INT_TYPE, new Type[0] );
  private static final Method ourGetStyleMethod = new Method("getStyle", Type.INT_TYPE, new Type[0] );

  public boolean generateCustomSetValue(final LwComponent lwComponent,
                                        final InstrumentationClassFinder.PseudoClass componentClass,
                                        final LwIntrospectedProperty property,
                                        final GeneratorAdapter generator,
                                        final int componentLocal, final String formClassName) {
    FontDescriptor descriptor = (FontDescriptor) property.getPropertyValue(lwComponent);
    if (descriptor.isFixedFont() && !descriptor.isFullyDefinedFont()) {
      generator.loadLocal(componentLocal);
      generatePushFont(generator, componentLocal, lwComponent, descriptor, property.getReadMethodName());

      Method setFontMethod = new Method(property.getWriteMethodName(), Type.VOID_TYPE, new Type[] { ourFontType } );
      Type componentType = AsmCodeGenerator.typeFromClassName(lwComponent.getComponentClassName());
      generator.invokeVirtual(componentType, setFontMethod);
      return true;
    }
    return false;
  }

  public static void generatePushFont(final GeneratorAdapter generator, final int componentLocal, final LwComponent lwComponent,
                                      final FontDescriptor descriptor, final String readMethodName) {
    final int fontLocal = generator.newLocal(ourFontType);

    generator.loadLocal(componentLocal);
    Type componentType = AsmCodeGenerator.typeFromClassName(lwComponent.getComponentClassName());
    Method getFontMethod = new Method(readMethodName, ourFontType, new Type[0] );
    generator.invokeVirtual(componentType, getFontMethod);
    generator.storeLocal(fontLocal);

    generator.newInstance(ourFontType);
    generator.dup();
    if (descriptor.getFontName() != null) {
      generator.push(descriptor.getFontName());
    }
    else {
      generator.loadLocal(fontLocal);
      generator.invokeVirtual(ourFontType, ourGetNameMethod);
    }

    if (descriptor.getFontStyle() >= 0) {
      generator.push(descriptor.getFontStyle());
    }
    else {
      generator.loadLocal(fontLocal);
      generator.invokeVirtual(ourFontType, ourGetStyleMethod);
    }

    if (descriptor.getFontSize() >= 0) {
      generator.push(descriptor.getFontSize());
    }
    else {
      generator.loadLocal(fontLocal);
      generator.invokeVirtual(ourFontType, ourGetSizeMethod);
    }
    generator.invokeConstructor(ourFontType, ourInitMethod);
  }

  public void generatePushValue(final GeneratorAdapter generator, final Object value) {
    FontDescriptor descriptor = (FontDescriptor) value;
    if (descriptor.isFixedFont()) {
      if (!descriptor.isFullyDefinedFont()) throw new IllegalStateException("Unexpected font state");
      generator.newInstance(ourFontType);
      generator.dup();
      generator.push(descriptor.getFontName());
      generator.push(descriptor.getFontStyle());
      generator.push(descriptor.getFontSize());
      generator.invokeConstructor(ourFontType, ourInitMethod);
    }
    else if (descriptor.getSwingFont() != null) {
      generator.push(descriptor.getSwingFont());
      generator.invokeStatic(ourUIManagerType, ourUIManagerGetFontMethod);
    }
    else {
      throw new IllegalStateException("Unknown font type");
    }
  }
}