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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 | } | ||