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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Eclipse Public License, Version 1.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.eclipse.org/org/documents/epl-v10.php
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.ide.eclipse.adt.internal.editors.layout.properties;
     18 
     19 import com.google.common.base.Objects;
     20 
     21 import org.eclipse.wb.internal.core.model.property.Property;
     22 
     23 import java.util.Arrays;
     24 
     25 /**
     26  * Property holding multiple instances of the same {@link XmlProperty} (but
     27  * bound to difference objects. This is used when multiple objects are selected
     28  * in the layout editor and the common properties are shown; editing a value
     29  * will (via {@link #setValue(Object)}) set it on all selected objects.
     30  * <p>
     31  * Similar to
     32  * org.eclipse.wb.internal.core.model.property.GenericPropertyComposite
     33  */
     34 class XmlPropertyComposite extends XmlProperty {
     35     private static final Object NO_VALUE = new Object();
     36 
     37     private final XmlProperty[] mProperties;
     38 
     39     public XmlPropertyComposite(XmlProperty primary, XmlProperty[] properties) {
     40         super(
     41             primary.getEditor(),
     42             primary.getFactory(),
     43             primary.getNode(),
     44             primary.getDescriptor());
     45         mProperties = properties;
     46     }
     47 
     48     @Override
     49     public String getTitle() {
     50         return mProperties[0].getTitle();
     51     }
     52 
     53     @Override
     54     public int hashCode() {
     55         return mProperties.length;
     56     }
     57 
     58     @Override
     59     public boolean equals(Object obj) {
     60         if (obj == this) {
     61             return true;
     62         }
     63 
     64         if (obj instanceof XmlPropertyComposite) {
     65             XmlPropertyComposite property = (XmlPropertyComposite) obj;
     66             return Arrays.equals(mProperties, property.mProperties);
     67         }
     68 
     69         return false;
     70     }
     71 
     72     @Override
     73     public boolean isModified() throws Exception {
     74         for (Property property : mProperties) {
     75             if (property.isModified()) {
     76                 return true;
     77             }
     78         }
     79 
     80         return false;
     81     }
     82 
     83     @Override
     84     public Object getValue() throws Exception {
     85         Object value = NO_VALUE;
     86         for (Property property : mProperties) {
     87             Object propertyValue = property.getValue();
     88             if (value == NO_VALUE) {
     89                 value = propertyValue;
     90             } else if (!Objects.equal(value, propertyValue)) {
     91                 return UNKNOWN_VALUE;
     92             }
     93         }
     94 
     95         return value;
     96     }
     97 
     98     @Override
     99     public void setValue(final Object value) throws Exception {
    100         // TBD: Wrap in ExecutionUtils.run?
    101         for (Property property : mProperties) {
    102             property.setValue(value);
    103         }
    104     }
    105 
    106     public static XmlPropertyComposite create(Property... properties) {
    107         // Cast from Property into XmlProperty
    108         XmlProperty[] xmlProperties = new XmlProperty[properties.length];
    109         for (int i = 0; i < properties.length; i++) {
    110             Property property = properties[i];
    111             xmlProperties[i] = (XmlProperty) property;
    112         }
    113 
    114         XmlPropertyComposite composite = new XmlPropertyComposite(xmlProperties[0], xmlProperties);
    115         composite.setCategory(xmlProperties[0].getCategory());
    116         return composite;
    117     }
    118 }
    119