1 /* 2 * Copyright (C) 2009 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.common.api; 18 19 import com.android.annotations.NonNull; 20 import com.android.annotations.Nullable; 21 import com.google.common.annotations.Beta; 22 23 /** 24 * Represents an XML element with a name, attributes and inner elements. 25 * <p/> 26 * The semantic of the element name is to be a fully qualified class name of a View to inflate. 27 * The element name is not expected to have a namespace. 28 * <p> 29 * <b>NOTE: This is not a public or final API; if you rely on this be prepared 30 * to adjust your code for the next tools release.</b> 31 * </p> 32 */ 33 @Beta 34 public interface IDragElement { 35 36 /** 37 * Returns the element name, which must match a fully qualified class name of 38 * a View to inflate. 39 */ 40 @NonNull 41 public abstract String getFqcn(); 42 43 /** 44 * Returns the bounds of the element's node, if it originated from an existing 45 * canvas. The rectangle is invalid and non-null when the element originated 46 * from the object palette. 47 * 48 * The bounds are absolute for the canvas. 49 */ 50 @NonNull 51 public abstract Rect getBounds(); 52 53 /** 54 * Returns the fully qualified class name of the parent, if the element originated 55 * from an existing canvas. Returns null if the element has no parent, such as a top 56 * level element or an element originating from the object palette. 57 */ 58 @Nullable 59 public abstract String getParentFqcn(); 60 61 /** 62 * Returns the bounds of the element's parent, absolute for the canvas, or invalid if there 63 * is no suitable parent. This is generally invalid when {@link #getParentFqcn()} is null. 64 * 65 * The returned rectangle can be invalid. It is never null. 66 */ 67 @NonNull 68 public abstract Rect getParentBounds(); 69 70 /** 71 * Returns a list of attributes. The list can be empty but is never null. 72 */ 73 @NonNull 74 public abstract IDragAttribute[] getAttributes(); 75 76 /** 77 * Returns the requested attribute or null if not found. 78 */ 79 @Nullable 80 public abstract IDragAttribute getAttribute(@Nullable String uri, @NonNull String localName); 81 82 /** 83 * Returns a list of inner elements. The list can be empty but is never null. 84 */ 85 @NonNull 86 public abstract IDragElement[] getInnerElements(); 87 88 /** 89 * An XML attribute in the {@link IDragElement}. 90 * <p/> 91 * The attribute is always represented by a namespace URI, a name and a value. 92 * The name cannot be empty. 93 * The namespace URI can be empty for an attribute without a namespace but is never null. 94 * The value can be empty but cannot be null. 95 */ 96 public interface IDragAttribute { 97 98 /** 99 * Returns the namespace URI of the attribute. 100 * Can be empty for an attribute without a namespace but is never null. 101 */ 102 @NonNull 103 public abstract String getUri(); 104 105 /** Returns the XML local name of the attribute. Cannot be null nor empty. */ 106 @NonNull 107 public abstract String getName(); 108 109 /** Returns the value of the attribute. Cannot be null. Can be empty. */ 110 @NonNull 111 public abstract String getValue(); 112 } 113 } 114 115
