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Diffstat (limited to 'javax/swing/text/html/ParagraphView.java')
-rw-r--r-- | javax/swing/text/html/ParagraphView.java | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/javax/swing/text/html/ParagraphView.java b/javax/swing/text/html/ParagraphView.java new file mode 100644 index 000000000..2339f4e66 --- /dev/null +++ b/javax/swing/text/html/ParagraphView.java @@ -0,0 +1,209 @@ +/* ParagraphView.java -- Renders a paragraph in HTML + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.swing.text.html; + +import java.awt.Graphics; +import java.awt.Shape; + +import javax.swing.SizeRequirements; +import javax.swing.text.AttributeSet; +import javax.swing.text.Document; +import javax.swing.text.Element; +import javax.swing.text.View; + +/** + * Renders a paragraph in HTML. This is a subclass of + * {@link javax.swing.text.ParagraphView} with some adjustments for + * understanding stylesheets. + * + * @author Roman Kennke (kennke@aicas.com) + */ +public class ParagraphView + extends javax.swing.text.ParagraphView +{ + + /** + * Creates a new ParagraphView for the specified element. + * + * @param element the element + */ + public ParagraphView(Element element) + { + super(element); + } + + /** + * Sets the parent of this view. This is implemented to call the parent + * functionality and then trigger {@link #setPropertiesFromAttributes} in + * order to load the stylesheet attributes. + * + * @param parent the parent view to set + */ + public void setParent(View parent) + { + super.setParent(parent); + if (parent != null) + setPropertiesFromAttributes(); + } + + /** + * Returns the attributes used by this view. This is implemented to multiplex + * the attributes of the model with the attributes of the stylesheet. + */ + public AttributeSet getAttributes() + { + // FIXME: Implement this multiplexing thing. + return super.getAttributes(); + } + + /** + * Loads the visual properties of the ParagraphView from the element's + * attributes and the stylesheet of the HTML document. + */ + protected void setPropertiesFromAttributes() + { + // FIXME: Implement this. + } + + /** + * Returns the stylesheet used by this view. + * + * @return the stylesheet used by this view + */ + protected StyleSheet getStyleSheet() + { + Document doc = getDocument(); + StyleSheet styleSheet = null; + if (doc instanceof HTMLDocument) + styleSheet = ((HTMLDocument) doc).getStyleSheet(); + return styleSheet; + } + + /** + * Calculates the minor axis requirements of this view. This is implemented + * to return the super class'es requirements and modifies the minimumSpan + * slightly so that it is not smaller than the length of the longest word. + * + * @param axis the axis + * @param r the SizeRequirements object to be used as return parameter; + * if <code>null</code> a new one will be created + * + * @return the requirements along the minor layout axis + */ + protected SizeRequirements calculateMinorAxisRequirements(int axis, + SizeRequirements r) + { + // FIXME: Implement the above specified behaviour. + return super.calculateMinorAxisRequirements(axis, r); + } + + /** + * Determines if this view is visible or not. If none of the children is + * visible and the only visible child is the break that ends the paragraph, + * this paragraph is not considered to be visible. + * + * @return the visibility of this paragraph + */ + public boolean isVisible() + { + // FIXME: Implement the above specified behaviour. + return super.isVisible(); + } + + /** + * Paints this view. This delegates to the superclass after the coordinates + * have been updated for tab calculations. + * + * @param g the graphics object + * @param a the current allocation of this view + */ + public void paint(Graphics g, Shape a) + { + // FIXME: Implement the above specified behaviour. + super.paint(g, a); + } + + /** + * Returns the preferred span of this view. If this view is not visible, + * we return <code>0</code>, otherwise the super class is called. + * + * @param axis the axis + * + * @return the preferred span of this view + */ + public float getPreferredSpan(int axis) + { + float span = 0; + if (isVisible()) + span = super.getPreferredSpan(axis); + return span; + } + + /** + * Returns the minimum span of this view. If this view is not visible, + * we return <code>0</code>, otherwise the super class is called. + * + * @param axis the axis + * + * @return the minimum span of this view + */ + public float getMinimumSpan(int axis) + { + float span = 0; + if (isVisible()) + span = super.getMinimumSpan(axis); + return span; + } + + /** + * Returns the maximum span of this view. If this view is not visible, + * we return <code>0</code>, otherwise the super class is called. + * + * @param axis the axis + * + * @return the maximum span of this view + */ + public float getMaximumSpan(int axis) + { + float span = 0; + if (isVisible()) + span = super.getMaximumSpan(axis); + return span; + } +} |