JavaFxAlignFeatureGenerator.java

package xapi.jre.ui.impl.feature;

import com.github.javaparser.ASTHelper;
import com.github.javaparser.ast.expr.UiAttrExpr;
import javafx.geometry.Pos;
import xapi.dev.source.MethodBuffer;
import xapi.dev.ui.ContainerMetadata;
import xapi.dev.ui.UiComponentGenerator;
import xapi.dev.ui.UiFeatureGenerator;
import xapi.dev.ui.UiGeneratorTools;
import xapi.dev.ui.UiVisitScope;


/**
 * Created by James X. Nelson (james @wetheinter.net) on 7/1/16.
 */
public class JavaFxAlignFeatureGenerator extends UiFeatureGenerator {

    @Override
    public UiVisitScope startVisit(
          UiGeneratorTools service, UiComponentGenerator generator, ContainerMetadata container, UiAttrExpr attr
    ) {

        String panel = container.peekPanelName();
        final MethodBuffer mb = container.getMethod(panel);

        final String align = container.getUi().getAttribute("align")
              .map(ASTHelper::extractAttrValue)
              .orElse("center").toLowerCase();

        // default align in javafx is ugly; only use it if null is explicitly sent.
        if (!"null".equals(align)) {
            String pos = mb.addImport(Pos.class);
            mb.print(panel + ".setAlignment(" + pos + ".");
            switch (align) {
                case "center":
                    mb.println(Pos.CENTER + ");");
                    break;
                case "centerLeft":
                    mb.println(Pos.CENTER_LEFT + ");");
                    break;
                case "centerRight":
                    mb.println(Pos.CENTER_RIGHT + ");");
                    break;
                case "top":
                    mb.println(Pos.TOP_CENTER + ");");
                    break;
                case "topLeft":
                    mb.println(Pos.TOP_LEFT + ");");
                    break;
                case "topRight":
                    mb.println(Pos.TOP_RIGHT + ");");
                    break;
                case "bottom":
                    mb.println(Pos.BOTTOM_CENTER + ");");
                    break;
                case "bottomLeft":
                    mb.println(Pos.BOTTOM_LEFT + ");");
                    break;
                case "bottomRight":
                    mb.println(Pos.BOTTOM_RIGHT + ");");
                    break;
                case "left":
                    mb.println(Pos.BASELINE_LEFT + ");");
                    break;
                case "right":
                    mb.println(Pos.BASELINE_RIGHT + ");");
                    break;
                case "middle":
                    mb.println(Pos.BASELINE_CENTER + ");");
                    break;
                default:
                    throw new IllegalArgumentException("Unacceptable align attribute value: " + align);
            }
        }


        return super.startVisit(service, generator, container, attr);
    }
}