| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.google.gwt.resources.css.ast; |
| |
| import com.google.gwt.resources.css.ast.CssProperty.DotPathValue; |
| import com.google.gwt.resources.css.ast.CssProperty.ListValue; |
| import com.google.gwt.resources.css.ast.CssProperty.StringValue; |
| import com.google.gwt.resources.css.ast.CssProperty.Value; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| /** |
| * Represents a sprited image. This is basically a normal CssRule, except for |
| * one well-known property {@value CssSprite#IMAGE_PROPERTY_NAME}, which |
| * specifies the name of an ImageResource accessor. |
| */ |
| public class CssSprite extends CssRule { |
| |
| public static final String IMAGE_PROPERTY_NAME = "gwt-image"; |
| |
| /** |
| * A facade for the underlying CssProperty list maintained by CssRule. We |
| * override the add and set methods to intercept the |
| * {@value CssSprite#IMAGE_PROPERTY_NAME} property. |
| */ |
| private class SpritePropertyList implements List<CssProperty> { |
| private final List<CssProperty> source; |
| |
| public SpritePropertyList(List<CssProperty> source) { |
| this.source = source; |
| } |
| |
| public boolean add(CssProperty o) { |
| if (!processProperty(o)) { |
| return source.add(o); |
| } else { |
| return false; |
| } |
| } |
| |
| public void add(int index, CssProperty element) { |
| if (!processProperty(element)) { |
| source.add(index, element); |
| } |
| } |
| |
| public boolean addAll(Collection<? extends CssProperty> c) { |
| return source.addAll(c); |
| } |
| |
| public boolean addAll(int index, Collection<? extends CssProperty> c) { |
| return source.addAll(index, c); |
| } |
| |
| public void clear() { |
| source.clear(); |
| } |
| |
| public boolean contains(Object o) { |
| return source.contains(o); |
| } |
| |
| public boolean containsAll(Collection<?> c) { |
| return source.containsAll(c); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return source.equals(o); |
| } |
| |
| public CssProperty get(int index) { |
| return source.get(index); |
| } |
| |
| @Override |
| public int hashCode() { |
| return source.hashCode(); |
| } |
| |
| public int indexOf(Object o) { |
| return source.indexOf(o); |
| } |
| |
| public boolean isEmpty() { |
| return source.isEmpty(); |
| } |
| |
| public Iterator<CssProperty> iterator() { |
| return source.iterator(); |
| } |
| |
| public int lastIndexOf(Object o) { |
| return source.lastIndexOf(o); |
| } |
| |
| public ListIterator<CssProperty> listIterator() { |
| return source.listIterator(); |
| } |
| |
| public ListIterator<CssProperty> listIterator(int index) { |
| return source.listIterator(index); |
| } |
| |
| public CssProperty remove(int index) { |
| return source.remove(index); |
| } |
| |
| public boolean remove(Object o) { |
| return source.remove(o); |
| } |
| |
| public boolean removeAll(Collection<?> c) { |
| return source.removeAll(c); |
| } |
| |
| public boolean retainAll(Collection<?> c) { |
| return source.retainAll(c); |
| } |
| |
| public CssProperty set(int index, CssProperty element) { |
| if (!processProperty(element)) { |
| return source.set(index, element); |
| } else { |
| return source.remove(index); |
| } |
| } |
| |
| public int size() { |
| return source.size(); |
| } |
| |
| public List<CssProperty> subList(int fromIndex, int toIndex) { |
| return source.subList(fromIndex, toIndex); |
| } |
| |
| public Object[] toArray() { |
| return source.toArray(); |
| } |
| |
| public <T> T[] toArray(T[] a) { |
| return source.toArray(a); |
| } |
| } |
| |
| private DotPathValue resourceFunction; |
| |
| @Override |
| public List<CssProperty> getProperties() { |
| return new SpritePropertyList(super.getProperties()); |
| } |
| |
| public DotPathValue getResourceFunction() { |
| return resourceFunction; |
| } |
| |
| public void setResourceFunction(DotPathValue resourceFunction) { |
| this.resourceFunction = resourceFunction; |
| } |
| |
| @Override |
| public void traverse(CssVisitor visitor, Context context) { |
| if (visitor.visit(this, context)) { |
| visitor.acceptWithInsertRemove(selectors); |
| visitor.acceptWithInsertRemove(getProperties()); |
| } |
| visitor.endVisit(this, context); |
| } |
| |
| private boolean processProperty(CssProperty property) { |
| if (IMAGE_PROPERTY_NAME.equals(property.getName())) { |
| setImageProperty(property.getValues()); |
| return true; |
| } |
| return false; |
| } |
| |
| private void setImageProperty(Value value) { |
| StringValue stringValue; |
| ListValue listValue; |
| |
| if ((stringValue = value.isStringValue()) != null) { |
| String s = stringValue.getValue(); |
| |
| // Allow the user to use both raw idents and quoted strings |
| if (s.startsWith("\"")) { |
| s = s.substring(1, s.length() - 1); |
| } |
| |
| resourceFunction = new DotPathValue(s); |
| |
| } else if ((listValue = value.isListValue()) != null) { |
| List<Value> values = listValue.getValues(); |
| if (values.size() == 1) { |
| setImageProperty(values.get(0)); |
| } |
| |
| } else { |
| throw new IllegalArgumentException("The " + IMAGE_PROPERTY_NAME |
| + " property of @sprite must have exactly one value"); |
| } |
| } |
| } |