210 lines
6.2 KiB
Java
210 lines
6.2 KiB
Java
![]() |
/* 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;
|
||
|
}
|
||
|
}
|