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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2006, 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.text.BreakIterator; | |
| 29 | +import javax.swing.event.DocumentEvent; | |
| 30 | +import javax.swing.text.*; | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * Displays the <dfn>inline element</dfn> styles | |
| 34 | + * based upon css attributes. | |
| 35 | + * | |
| 36 | + * @author Timothy Prinzing | |
| 37 | + */ | |
| 38 | +public class InlineView extends LabelView { | |
| 39 | + | |
| 40 | + /** | |
| 41 | + * Constructs a new view wrapped on an element. | |
| 42 | + * | |
| 43 | + * @param elem the element | |
| 44 | + */ | |
| 45 | + public InlineView(Element elem) { | |
| 46 | + super(elem); | |
| 47 | + StyleSheet sheet = getStyleSheet(); | |
| 48 | + attr = sheet.getViewAttributes(this); | |
| 49 | + } | |
| 50 | + | |
| 51 | + /** | |
| 52 | + * Gives notification that something was inserted into | |
| 53 | + * the document in a location that this view is responsible for. | |
| 54 | + * If either parameter is <code>null</code>, behavior of this method is | |
| 55 | + * implementation dependent. | |
| 56 | + * | |
| 57 | + * @param e the change information from the associated document | |
| 58 | + * @param a the current allocation of the view | |
| 59 | + * @param f the factory to use to rebuild if the view has children | |
| 60 | + * @since 1.5 | |
| 61 | + * @see View#insertUpdate | |
| 62 | + */ | |
| 63 | + public void insertUpdate(DocumentEvent e, Shape a, ViewFactory f) { | |
| 64 | + super.insertUpdate(e, a, f); | |
| 65 | + } | |
| 66 | + | |
| 67 | + /** | |
| 68 | + * Gives notification that something was removed from the document | |
| 69 | + * in a location that this view is responsible for. | |
| 70 | + * If either parameter is <code>null</code>, behavior of this method is | |
| 71 | + * implementation dependent. | |
| 72 | + * | |
| 73 | + * @param e the change information from the associated document | |
| 74 | + * @param a the current allocation of the view | |
| 75 | + * @param f the factory to use to rebuild if the view has children | |
| 76 | + * @since 1.5 | |
| 77 | + * @see View#removeUpdate | |
| 78 | + */ | |
| 79 | + public void removeUpdate(DocumentEvent e, Shape a, ViewFactory f) { | |
| 80 | + super.removeUpdate(e, a, f); | |
| 81 | + } | |
| 82 | + | |
| 83 | + /** | |
| 84 | + * Gives notification from the document that attributes were changed | |
| 85 | + * in a location that this view is responsible for. | |
| 86 | + * | |
| 87 | + * @param e the change information from the associated document | |
| 88 | + * @param a the current allocation of the view | |
| 89 | + * @param f the factory to use to rebuild if the view has children | |
| 90 | + * @see View#changedUpdate | |
| 91 | + */ | |
| 92 | + public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f) { | |
| 93 | + super.changedUpdate(e, a, f); | |
| 94 | + StyleSheet sheet = getStyleSheet(); | |
| 95 | + attr = sheet.getViewAttributes(this); | |
| 96 | + preferenceChanged(null, true, true); | |
| 97 | + } | |
| 98 | + | |
| 99 | + /** | |
| 100 | + * Fetches the attributes to use when rendering. This is | |
| 101 | + * implemented to multiplex the attributes specified in the | |
| 102 | + * model with a StyleSheet. | |
| 103 | + */ | |
| 104 | + public AttributeSet getAttributes() { | |
| 105 | + return attr; | |
| 106 | + } | |
| 107 | + | |
| 108 | + /** | |
| 109 | + * Determines how attractive a break opportunity in | |
| 110 | + * this view is. This can be used for determining which | |
| 111 | + * view is the most attractive to call <code>breakView</code> | |
| 112 | + * on in the process of formatting. A view that represents | |
| 113 | + * text that has whitespace in it might be more attractive | |
| 114 | + * than a view that has no whitespace, for example. The | |
| 115 | + * higher the weight, the more attractive the break. A | |
| 116 | + * value equal to or lower than <code>BadBreakWeight</code> | |
| 117 | + * should not be considered for a break. A value greater | |
| 118 | + * than or equal to <code>ForcedBreakWeight</code> should | |
| 119 | + * be broken. | |
| 120 | + * <p> | |
| 121 | + * This is implemented to provide the default behavior | |
| 122 | + * of returning <code>BadBreakWeight</code> unless the length | |
| 123 | + * is greater than the length of the view in which case the | |
| 124 | + * entire view represents the fragment. Unless a view has | |
| 125 | + * been written to support breaking behavior, it is not | |
| 126 | + * attractive to try and break the view. An example of | |
| 127 | + * a view that does support breaking is <code>LabelView</code>. | |
| 128 | + * An example of a view that uses break weight is | |
| 129 | + * <code>ParagraphView</code>. | |
| 130 | + * | |
| 131 | + * @param axis may be either View.X_AXIS or View.Y_AXIS | |
| 132 | + * @param pos the potential location of the start of the | |
| 133 | + * broken view >= 0. This may be useful for calculating tab | |
| 134 | + * positions. | |
| 135 | + * @param len specifies the relative length from <em>pos</em> | |
| 136 | + * where a potential break is desired >= 0. | |
| 137 | + * @return the weight, which should be a value between | |
| 138 | + * ForcedBreakWeight and BadBreakWeight. | |
| 139 | + * @see LabelView | |
| 140 | + * @see ParagraphView | |
| 141 | + * @see javax.swing.text.View#BadBreakWeight | |
| 142 | + * @see javax.swing.text.View#GoodBreakWeight | |
| 143 | + * @see javax.swing.text.View#ExcellentBreakWeight | |
| 144 | + * @see javax.swing.text.View#ForcedBreakWeight | |
| 145 | + */ | |
| 146 | + public int getBreakWeight(int axis, float pos, float len) { | |
| 147 | + if (nowrap) { | |
| 148 | + return BadBreakWeight; | |
| 149 | + } | |
| 150 | + return super.getBreakWeight(axis, pos, len); | |
| 151 | + } | |
| 152 | + | |
| 153 | + /** | |
| 154 | + * Tries to break this view on the given axis. Refer to | |
| 155 | + * {@link javax.swing.text.View#breakView} for a complete | |
| 156 | + * description of this method. | |
| 157 | + * <p>Behavior of this method is unspecified in case <code>axis</code> | |
| 158 | + * is neither <code>View.X_AXIS</code> nor <code>View.Y_AXIS</code>, and | |
| 159 | + * in case <code>offset</code>, <code>pos</code>, or <code>len</code> | |
| 160 | + * is null. | |
| 161 | + * | |
| 162 | + * @param axis may be either <code>View.X_AXIS</code> or | |
| 163 | + * <code>View.Y_AXIS</code> | |
| 164 | + * @param offset the location in the document model | |
| 165 | + * that a broken fragment would occupy >= 0. This | |
| 166 | + * would be the starting offset of the fragment | |
| 167 | + * returned | |
| 168 | + * @param pos the position along the axis that the | |
| 169 | + * broken view would occupy >= 0. This may be useful for | |
| 170 | + * things like tab calculations | |
| 171 | + * @param len specifies the distance along the axis | |
| 172 | + * where a potential break is desired >= 0 | |
| 173 | + * @return the fragment of the view that represents the | |
| 174 | + * given span. | |
| 175 | + * @since 1.5 | |
| 176 | + * @see javax.swing.text.View#breakView | |
| 177 | + */ | |
| 178 | + public View breakView(int axis, int offset, float pos, float len) { | |
| 179 | + return super.breakView(axis, offset, pos, len); | |
| 180 | + } | |
| 181 | + | |
| 182 | + | |
| 183 | + /** | |
| 184 | + * Set the cached properties from the attributes. | |
| 185 | + */ | |
| 186 | + protected void setPropertiesFromAttributes() { | |
| 187 | + super.setPropertiesFromAttributes(); | |
| 188 | + AttributeSet a = getAttributes(); | |
| 189 | + Object decor = a.getAttribute(CSS.Attribute.TEXT_DECORATION); | |
| 190 | + boolean u = (decor != null) ? | |
| 191 | + (decor.toString().indexOf("underline") >= 0) : false; | |
| 192 | + setUnderline(u); | |
| 193 | + boolean s = (decor != null) ? | |
| 194 | + (decor.toString().indexOf("line-through") >= 0) : false; | |
| 195 | + setStrikeThrough(s); | |
| 196 | + Object vAlign = a.getAttribute(CSS.Attribute.VERTICAL_ALIGN); | |
| 197 | + s = (vAlign != null) ? (vAlign.toString().indexOf("sup") >= 0) : false; | |
| 198 | + setSuperscript(s); | |
| 199 | + s = (vAlign != null) ? (vAlign.toString().indexOf("sub") >= 0) : false; | |
| 200 | + setSubscript(s); | |
| 201 | + | |
| 202 | + Object whitespace = a.getAttribute(CSS.Attribute.WHITE_SPACE); | |
| 203 | + if ((whitespace != null) && whitespace.equals("nowrap")) { | |
| 204 | + nowrap = true; | |
| 205 | + } else { | |
| 206 | + nowrap = false; | |
| 207 | + } | |
| 208 | + | |
| 209 | + HTMLDocument doc = (HTMLDocument)getDocument(); | |
| 210 | + // fetches background color from stylesheet if specified | |
| 211 | + Color bg = doc.getBackground(a); | |
| 212 | + if (bg != null) { | |
| 213 | + setBackground(bg); | |
| 214 | + } | |
| 215 | + } | |
| 216 | + | |
| 217 | + | |
| 218 | + protected StyleSheet getStyleSheet() { | |
| 219 | + HTMLDocument doc = (HTMLDocument) getDocument(); | |
| 220 | + return doc.getStyleSheet(); | |
| 221 | + } | |
| 222 | + | |
| 223 | + private boolean nowrap; | |
| 224 | + private AttributeSet attr; | |
| 225 | +} | |