[1069] | 1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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| 2 | // |
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| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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| 4 | // you may not use this file except in compliance with the License. |
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| 5 | // You may obtain a copy of the License at |
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| 6 | // |
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| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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| 8 | // |
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| 9 | // Unless required by applicable law or agreed to in writing, software |
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| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 12 | // See the License for the specific language governing permissions and |
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| 13 | // limitations under the License. |
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| 14 | |
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| 15 | package de.ugoe.cs.autoquest.htmlmonitor; |
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| 16 | |
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| 17 | import java.util.ArrayList; |
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| 18 | import java.util.List; |
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| 19 | |
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| 20 | /** |
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| 21 | * <p> |
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| 22 | * represents an element of an HTML GUI. This can be a server, which is usually the root of a |
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| 23 | * GUI structure, a web page, or a tag within a web page. |
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| 24 | * </p> |
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| 25 | * |
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| 26 | * @author Patrick Harms |
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| 27 | */ |
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| 28 | abstract class HtmlGUIElement { |
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| 29 | |
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| 30 | /** |
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| 31 | * the children of this element |
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| 32 | */ |
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| 33 | private List<HtmlGUIElement> children; |
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| 34 | |
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| 35 | /** |
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| 36 | * the id of this GUI element |
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| 37 | */ |
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| 38 | private String id; |
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| 39 | |
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| 40 | /** |
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| 41 | * the parent GUI element, null if none is present |
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| 42 | */ |
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| 43 | private HtmlGUIElement parent; |
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| 44 | |
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| 45 | /** |
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| 46 | * <p> |
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| 47 | * instantiates a new GUI element |
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| 48 | * </p> |
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| 49 | * |
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| 50 | * @param parentId the parent GUI element, null if none is present |
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| 51 | */ |
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| 52 | protected HtmlGUIElement(String id, HtmlGUIElement parent) { |
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| 53 | if (id == null) { |
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| 54 | throw new IllegalArgumentException("id must not be null"); |
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| 55 | } |
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| 56 | |
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| 57 | this.id = id; |
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| 58 | this.parent = parent; |
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| 59 | } |
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| 60 | |
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| 61 | /** |
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| 62 | * <p> |
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| 63 | * returns the children of this element if any, null else |
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| 64 | * </p> |
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| 65 | * |
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| 66 | * @return the children |
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| 67 | */ |
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| 68 | List<HtmlGUIElement> getChildren() { |
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| 69 | return children; |
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| 70 | } |
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| 71 | |
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| 72 | |
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| 73 | /** |
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| 74 | * adds a child to this element. Merges children, for which the equal method returns true |
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| 75 | * |
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| 76 | * @param child the child to be added |
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| 77 | */ |
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| 78 | void addChild(HtmlGUIElement newChild) { |
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| 79 | if (newChild != null) { |
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| 80 | if (children == null) { |
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| 81 | children = new ArrayList<HtmlGUIElement>(); |
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| 82 | } |
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| 83 | |
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| 84 | boolean added = false; |
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| 85 | for (HtmlGUIElement child : children) { |
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| 86 | if (child.equals(newChild)) { |
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| 87 | if (newChild.getChildren() != null) { |
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| 88 | for (HtmlGUIElement subchild : newChild.getChildren()) { |
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| 89 | child.addChild(subchild); |
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| 90 | } |
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| 91 | } |
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| 92 | |
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| 93 | added = true; |
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| 94 | break; |
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| 95 | } |
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| 96 | } |
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| 97 | |
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| 98 | if (!added) { |
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| 99 | children.add(newChild); |
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| 100 | } |
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| 101 | } |
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| 102 | } |
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| 103 | |
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| 104 | /** |
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| 105 | * returns the id of the GUI element. |
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| 106 | * |
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| 107 | * @return the id of the GUI element |
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| 108 | */ |
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| 109 | String getId() { |
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| 110 | return id; |
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| 111 | } |
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| 112 | |
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| 113 | /** |
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| 114 | * <p> |
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| 115 | * returns the id of the parent GUI element, if any |
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| 116 | * </p> |
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| 117 | * |
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| 118 | * @return the id of the parent GUI element, or null, if this element does not have a parent |
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| 119 | */ |
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| 120 | String getParentId() { |
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| 121 | if (parent == null) { |
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| 122 | return null; |
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| 123 | } |
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| 124 | else { |
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| 125 | return parent.getId(); |
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| 126 | } |
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| 127 | } |
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| 128 | |
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| 129 | } |
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