1/* 2 * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25package javax.swing.text.html; 26 27import java.awt.*; 28import java.awt.event.*; 29import java.io.*; 30import java.net.MalformedURLException; 31import java.net.URL; 32import javax.swing.text.*; 33import javax.swing.*; 34import javax.swing.border.*; 35import javax.swing.event.*; 36import java.util.*; 37 38/** 39 * EditableView sets the view it contains to be visible only when the 40 * JTextComponent the view is contained in is editable. The min/pref/max 41 * size is 0 when not visible. 42 * 43 * @author Scott Violet 44 */ 45class EditableView extends ComponentView { 46 47 EditableView(Element e) { 48 super(e); 49 } 50 51 public float getMinimumSpan(int axis) { 52 if (isVisible) { 53 return super.getMinimumSpan(axis); 54 } 55 return 0; 56 } 57 58 public float getPreferredSpan(int axis) { 59 if (isVisible) { 60 return super.getPreferredSpan(axis); 61 } 62 return 0; 63 } 64 65 public float getMaximumSpan(int axis) { 66 if (isVisible) { 67 return super.getMaximumSpan(axis); 68 } 69 return 0; 70 } 71 72 public void paint(Graphics g, Shape allocation) { 73 Component c = getComponent(); 74 Container host = getContainer(); 75 76 if (host instanceof JTextComponent && 77 isVisible != ((JTextComponent)host).isEditable()) { 78 isVisible = ((JTextComponent)host).isEditable(); 79 preferenceChanged(null, true, true); 80 host.repaint(); 81 } 82 /* 83 * Note: we cannot tweak the visible state of the 84 * component in createComponent() even though it 85 * gets called after the setParent() call where 86 * the value of the boolean is set. This 87 * because, the setComponentParent() in the 88 * superclass, always does a setVisible(false) 89 * after calling createComponent(). We therefore 90 * use this flag in the paint() method to 91 * setVisible() to true if required. 92 */ 93 if (isVisible) { 94 super.paint(g, allocation); 95 } 96 else { 97 setSize(0, 0); 98 } 99 if (c != null) { 100 c.setFocusable(isVisible); 101 } 102 } 103 104 public void setParent(View parent) { 105 if (parent != null) { 106 Container host = parent.getContainer(); 107 if (host != null) { 108 if (host instanceof JTextComponent) { 109 isVisible = ((JTextComponent)host).isEditable(); 110 } else { 111 isVisible = false; 112 } 113 } 114 } 115 super.setParent(parent); 116 } 117 118 /** 119 * @return true if the Component is visible. 120 */ 121 public boolean isVisible() { 122 return isVisible; 123 } 124 125 /** Set to true if the component is visible. This is based off the 126 * editability of the container. */ 127 private boolean isVisible; 128} // End of EditableView 129