EditTextCodeGenerator.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.motorola.studio.android.generateviewbylayout.codegenerators;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.dom.Block;
import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.Modifier.ModifierKeyword;
import org.eclipse.jdt.core.dom.PrimitiveType;
import org.eclipse.jdt.core.dom.ReturnStatement;
import org.eclipse.jdt.core.dom.SingleVariableDeclaration;
import org.eclipse.jdt.core.dom.TypeDeclaration;

import com.motorola.studio.android.codeutils.i18n.CodeUtilsNLS;
import com.motorola.studio.android.generateviewbylayout.JavaViewBasedOnLayoutModifierConstants;
import com.motorola.studio.android.generateviewbylayout.model.CodeGeneratorDataBasedOnLayout;
import com.motorola.studio.android.generateviewbylayout.model.LayoutNode;

/**
 * Responsible to add methods to deal with EditText events
 */
public class EditTextCodeGenerator extends AbstractLayoutCodeGenerator
{
    /**
     * @param codeGeneratorData
     * @param onCreateDeclaration
     * @param typeDeclaration
     */
    public EditTextCodeGenerator(CodeGeneratorDataBasedOnLayout codeGeneratorData,
            MethodDeclaration onCreateDeclaration, TypeDeclaration typeDeclaration)
    {
        super(codeGeneratorData, onCreateDeclaration, typeDeclaration);
    }

    @Override
    public void generateCode(IProgressMonitor monitor) throws JavaModelException
    {
        addOnKeyHandler(monitor);
    }

    /**
     * Add methods to deal with key handler (EditText's event)
     *    
     * <br>
     * GENERATED_CODE_FORMAT:
     * <br>
     * $GUI_ID.setOnKeyListener(new View.OnKeyListener() {
     * <br>
     *       public boolean onKey(View target, int keyCode, KeyEvent event) {
     * <br>      
     *           return true;
     * <br>
     *       }
     * <br>
     *   }); 
     */
    @SuppressWarnings("unchecked")
    private void addOnKeyHandler(IProgressMonitor monitor) throws JavaModelException
    {
        SubMonitor subMonitor = SubMonitor.convert(monitor);
        subMonitor.beginTask(CodeUtilsNLS.JavaViewBasedOnLayoutModifier_AddingOnKeyHandler,
                codeGeneratorData.getGuiItems().size());
        /*
         * AST to be written:
         * 
         * MethodInvocations        
        String methodName = SimpleName("setOnKeyListener")
        String optionalExpression = SimpleName(guiId);
        arguments=ClassInstanceCreation
                AnonymousClassDeclaration
                    var body=MethodDeclaration();
                        modifier=public
                        methodName = SimpleName("onKey");
                        List<SingleVariableDeclaration>
                            List<String> types converter p/ SimpleType (pode ser PrimitiveType)
                            List<String> names converter p/ SimpleName
                               ReturnStatement optionalExpression BooleanLiteral                        
              type=SimpleType("listenerName")
               */
        for (LayoutNode node : codeGeneratorData.getGuiItems())
        {
            if (node.shouldInsertCode()
                    && node.getNodeType().equals(LayoutNode.LayoutNodeViewType.EditText.name()))
            {
                boolean containMethodDeclared =
                        checkIfInvokeMethodIsDeclared(node,
                                JavaViewBasedOnLayoutModifierConstants.SET_ON_KEY_LISTENER);
                if (!containMethodDeclared)
                {
                    List<SingleVariableDeclaration> parameters =
                            new ArrayList<SingleVariableDeclaration>();
                    SingleVariableDeclaration param1 =
                            createVariableDeclarationFromStrings(
                                    JavaViewBasedOnLayoutModifierConstants.VIEW_CLASS,
                                    JavaViewBasedOnLayoutModifierConstants.VIEW_VARIABLE_NAME);
                    parameters.add(param1);
                    SingleVariableDeclaration param2 =
                            createVariableDeclarationPrimitiveCode(PrimitiveType.INT,
                                    JavaViewBasedOnLayoutModifierConstants.KEY_CODE); //$NON-NLS-1$
                    parameters.add(param2);
                    SingleVariableDeclaration param3 =
                            createVariableDeclarationFromStrings(
                                    JavaViewBasedOnLayoutModifierConstants.KEY_EVENT,
                                    JavaViewBasedOnLayoutModifierConstants.EVENT); //$NON-NLS-1$ //$NON-NLS-2$
                    parameters.add(param3);
                    MethodDeclaration methodDeclaration =
                            addMethodDeclaration(ModifierKeyword.PUBLIC_KEYWORD,
                                    JavaViewBasedOnLayoutModifierConstants.ON_KEY, //$NON-NLS-1$
                                    PrimitiveType.BOOLEAN, parameters);
                    Block block = onCreateDeclaration.getAST().newBlock();
                    methodDeclaration.setBody(block);
                    ReturnStatement statement = onCreateDeclaration.getAST().newReturnStatement();
                    statement.setExpression(onCreateDeclaration.getAST().newBooleanLiteral(true));
                    methodDeclaration.getBody().statements().add(statement);
                    addMethodInvocationToListenerHandler(
                            node.getNodeId(),
                            JavaViewBasedOnLayoutModifierConstants.SET_ON_KEY_LISTENER,
                            JavaViewBasedOnLayoutModifierConstants.VIEW_CLASS, //$NON-NLS-1$
                            JavaViewBasedOnLayoutModifierConstants.ON_KEY_LISTENER,
                            methodDeclaration); //$NON-NLS-1$
                }
            }
            subMonitor.worked(1);
        }
    }
}