Frames | No Frames |
1: /* ParagraphView.java -- Renders a paragraph in HTML 2: Copyright (C) 2006 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package javax.swing.text.html; 40: 41: import java.awt.Graphics; 42: import java.awt.Shape; 43: 44: import javax.swing.SizeRequirements; 45: import javax.swing.text.AttributeSet; 46: import javax.swing.text.Document; 47: import javax.swing.text.Element; 48: import javax.swing.text.View; 49: 50: /** 51: * Renders a paragraph in HTML. This is a subclass of 52: * {@link javax.swing.text.ParagraphView} with some adjustments for 53: * understanding stylesheets. 54: * 55: * @author Roman Kennke (kennke@aicas.com) 56: */ 57: public class ParagraphView 58: extends javax.swing.text.ParagraphView 59: { 60: 61: /** 62: * Creates a new ParagraphView for the specified element. 63: * 64: * @param element the element 65: */ 66: public ParagraphView(Element element) 67: { 68: super(element); 69: } 70: 71: /** 72: * Sets the parent of this view. This is implemented to call the parent 73: * functionality and then trigger {@link #setPropertiesFromAttributes} in 74: * order to load the stylesheet attributes. 75: * 76: * @param parent the parent view to set 77: */ 78: public void setParent(View parent) 79: { 80: super.setParent(parent); 81: if (parent != null) 82: setPropertiesFromAttributes(); 83: } 84: 85: /** 86: * Returns the attributes used by this view. This is implemented to multiplex 87: * the attributes of the model with the attributes of the stylesheet. 88: */ 89: public AttributeSet getAttributes() 90: { 91: // FIXME: Implement this multiplexing thing. 92: return super.getAttributes(); 93: } 94: 95: /** 96: * Loads the visual properties of the ParagraphView from the element's 97: * attributes and the stylesheet of the HTML document. 98: */ 99: protected void setPropertiesFromAttributes() 100: { 101: // FIXME: Implement this. 102: } 103: 104: /** 105: * Returns the stylesheet used by this view. 106: * 107: * @return the stylesheet used by this view 108: */ 109: protected StyleSheet getStyleSheet() 110: { 111: Document doc = getDocument(); 112: StyleSheet styleSheet = null; 113: if (doc instanceof HTMLDocument) 114: styleSheet = ((HTMLDocument) doc).getStyleSheet(); 115: return styleSheet; 116: } 117: 118: /** 119: * Calculates the minor axis requirements of this view. This is implemented 120: * to return the super class'es requirements and modifies the minimumSpan 121: * slightly so that it is not smaller than the length of the longest word. 122: * 123: * @param axis the axis 124: * @param r the SizeRequirements object to be used as return parameter; 125: * if <code>null</code> a new one will be created 126: * 127: * @return the requirements along the minor layout axis 128: */ 129: protected SizeRequirements calculateMinorAxisRequirements(int axis, 130: SizeRequirements r) 131: { 132: // FIXME: Implement the above specified behaviour. 133: return super.calculateMinorAxisRequirements(axis, r); 134: } 135: 136: /** 137: * Determines if this view is visible or not. If none of the children is 138: * visible and the only visible child is the break that ends the paragraph, 139: * this paragraph is not considered to be visible. 140: * 141: * @return the visibility of this paragraph 142: */ 143: public boolean isVisible() 144: { 145: // FIXME: Implement the above specified behaviour. 146: return super.isVisible(); 147: } 148: 149: /** 150: * Paints this view. This delegates to the superclass after the coordinates 151: * have been updated for tab calculations. 152: * 153: * @param g the graphics object 154: * @param a the current allocation of this view 155: */ 156: public void paint(Graphics g, Shape a) 157: { 158: // FIXME: Implement the above specified behaviour. 159: super.paint(g, a); 160: } 161: 162: /** 163: * Returns the preferred span of this view. If this view is not visible, 164: * we return <code>0</code>, otherwise the super class is called. 165: * 166: * @param axis the axis 167: * 168: * @return the preferred span of this view 169: */ 170: public float getPreferredSpan(int axis) 171: { 172: float span = 0; 173: if (isVisible()) 174: span = super.getPreferredSpan(axis); 175: return span; 176: } 177: 178: /** 179: * Returns the minimum span of this view. If this view is not visible, 180: * we return <code>0</code>, otherwise the super class is called. 181: * 182: * @param axis the axis 183: * 184: * @return the minimum span of this view 185: */ 186: public float getMinimumSpan(int axis) 187: { 188: float span = 0; 189: if (isVisible()) 190: span = super.getMinimumSpan(axis); 191: return span; 192: } 193: 194: /** 195: * Returns the maximum span of this view. If this view is not visible, 196: * we return <code>0</code>, otherwise the super class is called. 197: * 198: * @param axis the axis 199: * 200: * @return the maximum span of this view 201: */ 202: public float getMaximumSpan(int axis) 203: { 204: float span = 0; 205: if (isVisible()) 206: span = super.getMaximumSpan(axis); 207: return span; 208: } 209: }