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| 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 | + */ | |
| 25 | +package javax.swing.text.html; | |
| 26 | + | |
| 27 | +import java.awt.*; | |
| 28 | +import java.awt.event.*; | |
| 29 | +import java.io.*; | |
| 30 | +import java.net.MalformedURLException; | |
| 31 | +import java.net.URL; | |
| 32 | +import javax.swing.text.*; | |
| 33 | +import javax.swing.*; | |
| 34 | +import javax.swing.border.*; | |
| 35 | +import javax.swing.event.*; | |
| 36 | +import 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 | + */ | |
| 45 | +class 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 != null && | |
| 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 | |