1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 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 android.text; 18 19 /** 20 * This is the interface for text whose content and markup 21 * can be changed (as opposed 22 * to immutable text like Strings). If you make a {@link DynamicLayout} 23 * of an Editable, the layout will be reflowed as the text is changed. 24 */ 25 public interface Editable 26 extends CharSequence, GetChars, Spannable, Appendable 27 { 28 /** 29 * Replaces the specified range (<code>st…en</code>) of text in this 30 * Editable with a copy of the slice <code>start…end</code> from 31 * <code>source</code>. The destination slice may be empty, in which case 32 * the operation is an insertion, or the source slice may be empty, 33 * in which case the operation is a deletion. 34 * <p> 35 * Before the change is committed, each filter that was set with 36 * {@link #setFilters} is given the opportunity to modify the 37 * <code>source</code> text. 38 * <p> 39 * If <code>source</code> 40 * is Spanned, the spans from it are preserved into the Editable. 41 * Existing spans within the Editable that entirely cover the replaced 42 * range are retained, but any that were strictly within the range 43 * that was replaced are removed. If the <code>source</code> contains a span 44 * with {@link Spanned#SPAN_PARAGRAPH} flag, and it does not satisfy the 45 * paragraph boundary constraint, it is not retained. As a special case, the 46 * cursor position is preserved even when the entire range where it is located 47 * is replaced. 48 * @return a reference to this object. 49 * 50 * @see Spanned#SPAN_PARAGRAPH 51 */ 52 public Editable replace(int st, int en, CharSequence source, int start, int end); 53 54 /** 55 * Convenience for replace(st, en, text, 0, text.length()) 56 * @see #replace(int, int, CharSequence, int, int) 57 */ 58 public Editable replace(int st, int en, CharSequence text); 59 60 /** 61 * Convenience for replace(where, where, text, start, end) 62 * @see #replace(int, int, CharSequence, int, int) 63 */ 64 public Editable insert(int where, CharSequence text, int start, int end); 65 66 /** 67 * Convenience for replace(where, where, text, 0, text.length()); 68 * @see #replace(int, int, CharSequence, int, int) 69 */ 70 public Editable insert(int where, CharSequence text); 71 72 /** 73 * Convenience for replace(st, en, "", 0, 0) 74 * @see #replace(int, int, CharSequence, int, int) 75 */ 76 public Editable delete(int st, int en); 77 78 /** 79 * Convenience for replace(length(), length(), text, 0, text.length()) 80 * @see #replace(int, int, CharSequence, int, int) 81 */ 82 public Editable append(CharSequence text); 83 84 /** 85 * Convenience for replace(length(), length(), text, start, end) 86 * @see #replace(int, int, CharSequence, int, int) 87 */ 88 public Editable append(CharSequence text, int start, int end); 89 90 /** 91 * Convenience for append(String.valueOf(text)). 92 * @see #replace(int, int, CharSequence, int, int) 93 */ 94 public Editable append(char text); 95 96 /** 97 * Convenience for replace(0, length(), "", 0, 0). 98 * Note that this clears the text, not the spans; 99 * use {@link #clearSpans} if you need that. 100 * @see #replace(int, int, CharSequence, int, int) 101 */ 102 public void clear(); 103 104 /** 105 * Removes all spans from the Editable, as if by calling 106 * {@link #removeSpan} on each of them. 107 */ 108 public void clearSpans(); 109 110 /** 111 * Sets the series of filters that will be called in succession 112 * whenever the text of this Editable is changed, each of which has 113 * the opportunity to limit or transform the text that is being inserted. 114 */ 115 public void setFilters(InputFilter[] filters); 116 117 /** 118 * Returns the array of input filters that are currently applied 119 * to changes to this Editable. 120 */ 121 public InputFilter[] getFilters(); 122 123 /** 124 * Factory used by TextView to create new {@link Editable Editables}. You can subclass 125 * it to provide something other than {@link SpannableStringBuilder}. 126 * 127 * @see android.widget.TextView#setEditableFactory(Factory) 128 */ 129 public static class Factory { 130 private static Editable.Factory sInstance = new Editable.Factory(); 131 132 /** 133 * Returns the standard Editable Factory. 134 */ 135 public static Editable.Factory getInstance() { 136 return sInstance; 137 } 138 139 /** 140 * Returns a new SpannedStringBuilder from the specified 141 * CharSequence. You can override this to provide 142 * a different kind of Spanned. 143 */ 144 public Editable newEditable(CharSequence source) { 145 return new SpannableStringBuilder(source); 146 } 147 } 148 } 149
