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Diffstat (limited to 'libjava/classpath/javax/swing/text/html/BlockView.java')
-rw-r--r-- | libjava/classpath/javax/swing/text/html/BlockView.java | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/text/html/BlockView.java b/libjava/classpath/javax/swing/text/html/BlockView.java new file mode 100644 index 00000000000..6274e7b1756 --- /dev/null +++ b/libjava/classpath/javax/swing/text/html/BlockView.java @@ -0,0 +1,301 @@ +/* BlockView.java -- + Copyright (C) 2005 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.Rectangle; +import java.awt.Shape; + +import javax.swing.SizeRequirements; +import javax.swing.event.DocumentEvent; +import javax.swing.text.AttributeSet; +import javax.swing.text.BoxView; +import javax.swing.text.Element; +import javax.swing.text.View; +import javax.swing.text.ViewFactory; + +/** + * @author Lillian Angel <langel@redhat.com> + */ +public class BlockView extends BoxView +{ + + /** + * Creates a new view that represents an html box. + * This can be used for a number of elements. + * + * @param elem - the element to create a view for + * @param axis - either View.X_AXIS or View.Y_AXIS + */ + public BlockView(Element elem, int axis) + { + super(elem, axis); + } + + /** + * Creates the parent view for this. It is called before + * any other methods, if the parent view is working properly. + * Implemented to forward to the superclass and call + * setPropertiesFromAttributes to set the paragraph + * properties. + * + * @param parent - the new parent, or null if the view + * is being removed from a parent it was added to. + */ + public void setParent(View parent) + { + super.setParent(parent); + + if (parent != null) + setPropertiesFromAttributes(); + } + + /** + * Calculates the requirements along the major axis. + * This is implemented to call the superclass and then + * adjust it if the CSS width or height attribute is specified + * and applicable. + * + * @param axis - the axis to check the requirements for. + * @param r - the SizeRequirements. If null, one is created. + * @return the new SizeRequirements object. + */ + protected SizeRequirements calculateMajorAxisRequirements(int axis, + SizeRequirements r) + { + SizeRequirements sr = super.calculateMajorAxisRequirements(axis, r); + // FIXME: adjust it if the CSS width or height attribute is specified + // and applicable + return sr; + } + + /** + * Calculates the requirements along the minor axis. + * This is implemented to call the superclass and then + * adjust it if the CSS width or height attribute is specified + * and applicable. + * + * @param axis - the axis to check the requirements for. + * @param r - the SizeRequirements. If null, one is created. + * @return the new SizeRequirements object. + */ + protected SizeRequirements calculateMinorAxisRequirements(int axis, + SizeRequirements r) + { + SizeRequirements sr = super.calculateMinorAxisRequirements(axis, r); + // FIXME: adjust it if the CSS width or height attribute is specified + // and applicable. + return sr; + } + + /** + * Lays out the box along the minor axis (the axis that is + * perpendicular to the axis that it represents). The results + * of the layout are placed in the given arrays which are + * the allocations to the children along the minor axis. + * + * @param targetSpan - the total span given to the view, also + * used to layout the children. + * @param axis - the minor axis + * @param offsets - the offsets from the origin of the view for + * all the child views. This is a return value and is filled in by this + * function. + * @param spans - the span of each child view. This is a return value and is + * filled in by this function. + */ + protected void layoutMinorAxis(int targetSpan, int axis, + int[] offsets, int[] spans) + { + // FIXME: Not implemented. + super.layoutMinorAxis(targetSpan, axis, offsets, spans); + } + + /** + * Paints using the given graphics configuration and shape. + * This delegates to the css box painter to paint the + * border and background prior to the interior. + * + * @param g - Graphics configuration + * @param a - the Shape to render into. + */ + public void paint(Graphics g, Shape a) + { + Rectangle rect = (Rectangle) a; + // FIXME: not fully implemented + getStyleSheet().getBoxPainter(getAttributes()).paint(g, rect.x, rect.y, + rect.width, + rect.height, this); + super.paint(g, a); + } + + /** + * Fetches the attributes to use when painting. + * + * @return the attributes of this model. + */ + public AttributeSet getAttributes() + { + return getStyleSheet().getViewAttributes(this); + } + + /** + * Gets the resize weight. + * + * @param axis - the axis to get the resize weight for. + * @return the resize weight. + * @throws IllegalArgumentException - for an invalid axis + */ + public int getResizeWeight(int axis) throws IllegalArgumentException + { + // Can't resize the Y_AXIS + if (axis == Y_AXIS) + return 0; + if (axis == X_AXIS) + return 1; + throw new IllegalArgumentException("Invalid Axis"); + } + + /** + * Gets the alignment. + * + * @param axis - the axis to get the alignment for. + * @return the alignment. + */ + public float getAlignment(int axis) + { + if (axis == X_AXIS) + return 0.0F; + if (axis == Y_AXIS) + { + if (getViewCount() == 0) + return 0.0F; + float prefHeight = getPreferredSpan(Y_AXIS); + float firstRowHeight = getView(0).getPreferredSpan(Y_AXIS); + return (firstRowHeight / 2.F) / prefHeight; + } + throw new IllegalArgumentException("Invalid Axis"); + } + + /** + * Gives notification from the document that attributes were + * changed in a location that this view is responsible for. + * + * @param ev - the change information + * @param a - the current shape of the view + * @param f - the factory to use to rebuild if the view has children. + */ + public void changedUpdate(DocumentEvent ev, + Shape a, ViewFactory f) + { + super.changedUpdate(ev, a, f); + + // If more elements were added, then need to set the properties for them + int currPos = ev.getOffset(); + if (currPos <= getStartOffset() && (currPos + ev.getLength()) >= getEndOffset()) + setPropertiesFromAttributes(); + } + + /** + * Determines the preferred span along the axis. + * + * @param axis - the view to get the preferred span for. + * @return the span the view would like to be painted into >=0/ + * The view is usually told to paint into the span that is returned, + * although the parent may choose to resize or break the view. + * @throws IllegalArgumentException - for an invalid axis + */ + public float getPreferredSpan(int axis) throws IllegalArgumentException + { + if (axis == X_AXIS || axis == Y_AXIS) + return super.getPreferredSpan(axis); + throw new IllegalArgumentException("Invalid Axis"); + } + + /** + * Determines the minimum span along the axis. + * + * @param axis - the axis to get the minimum span for. + * @return the span the view would like to be painted into >=0/ + * The view is usually told to paint into the span that is returned, + * although the parent may choose to resize or break the view. + * @throws IllegalArgumentException - for an invalid axis + */ + public float getMinimumSpan(int axis) throws IllegalArgumentException + { + if (axis == X_AXIS || axis == Y_AXIS) + return super.getMinimumSpan(axis); + throw new IllegalArgumentException("Invalid Axis"); + } + + /** + * Determines the maximum span along the axis. + * + * @param axis - the axis to get the maximum span for. + * @return the span the view would like to be painted into >=0/ + * The view is usually told to paint into the span that is returned, + * although the parent may choose to resize or break the view. + * @throws IllegalArgumentException - for an invalid axis + */ + public float getMaximumSpan(int axis) throws IllegalArgumentException + { + if (axis == X_AXIS || axis == Y_AXIS) + return super.getMaximumSpan(axis); + throw new IllegalArgumentException("Invalid Axis"); + } + + /** + * Updates any cached values that come from attributes. + */ + protected void setPropertiesFromAttributes() + { + // FIXME: Not implemented (need to use StyleSheet). + } + + /** + * Gets the default style sheet. + * + * @return the style sheet + */ + protected StyleSheet getStyleSheet() + { + StyleSheet styleSheet = new StyleSheet(); + styleSheet.importStyleSheet(getClass().getResource(HTMLEditorKit.DEFAULT_CSS)); + return styleSheet; + } +} |