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+/* HRuleView.java -- Horizontal dash in HTML documents.
+ 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.Color;
+import java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Shape;
+
+import javax.swing.text.Element;
+import javax.swing.text.View;
+
+/**
+ * Represents the long horizontal separating dash that can be inserted into the
+ * HTML documents with HR tag.
+ */
+class HRuleView extends InlineView
+{
+ /**
+ * The null view, indicating, that nothing should be painted ahead the
+ * breaking point.
+ */
+ View nullView;
+
+ /**
+ * The height of the horizontal dash area.
+ */
+ static int HEIGHT = 4;
+
+ /**
+ * The imaginary invisible view that stays after end of line after the
+ * breaking procedure. It occupies on character.
+ */
+ class Beginning extends NullView
+ {
+ /**
+ * The break offset that becomes the views start offset.
+ */
+ int breakOffset;
+
+ /**
+ * Return the end offset that is always one char after the break offset.
+ */
+ public int getEndOffset()
+ {
+ return breakOffset + 1;
+ }
+
+ /**
+ * Return the start offset that has been passed in a constructor.
+ */
+ public int getStartOffset()
+ {
+ return breakOffset;
+ }
+
+ /**
+ * Create the new instance of this view.
+ *
+ * @param element the element (inherited from the HR view)
+ * @param offset the position where the HR view has been broken
+ */
+ public Beginning(Element element, int offset)
+ {
+ super(element);
+ breakOffset = offset;
+ }
+ }
+
+ /**
+ * Creates the new HR view.
+ */
+ public HRuleView(Element element)
+ {
+ super(element);
+ }
+
+ /**
+ * Returns the ForcedBreakWeight for the vertical axis, indicating, the the
+ * view must be broken to be displayed correctly. The horizontal dash is
+ * not breakeable along the Y axis.
+ */
+ public int getBreakWeight(int axis, float pos, float len)
+ {
+ if (axis == X_AXIS && ((getEndOffset() - getStartOffset()) > 1))
+ return ForcedBreakWeight;
+ else
+ return BadBreakWeight;
+ }
+
+ /**
+ * Draws the double line, upped black and the lower light gray.
+ */
+ public void paint(Graphics g, Shape a)
+ {
+ Rectangle bounds = a.getBounds();
+
+ int x = bounds.x;
+ int y = bounds.y;
+
+ int w = bounds.x + bounds.width;
+
+ // We move "half pixel up" from the actual horizontal position -
+ // this will be rounded to the closest actual int co-ordinate.
+ int h = bounds.y + (int) Math.round(bounds.height * 0.5 - 0.5);
+
+ g.setColor(Color.black);
+ g.drawLine(x, y++, w, h++);
+ g.setColor(Color.lightGray);
+ g.drawLine(x, y, w, h);
+ }
+
+ /**
+ * Break the view into this view and the invisible imaginary view that
+ * stays on the end of line that is broken by HR dash. The view is broken
+ * only if its length is longer than one (the two characters are expected
+ * in the initial length).
+ */
+ public View breakView(int axis, int offset, float pos, float len)
+ {
+ if (getEndOffset() - getStartOffset() > 1)
+ return new Beginning(getElement(), offset);
+ else
+ return this;
+ }
+
+ /**
+ * Returns the width of the container for the horizontal axis and the
+ * thickness of the dash area for the vertical axis.
+ */
+ public float getMaximumSpan(int axis)
+ {
+ if (axis == X_AXIS)
+ {
+ Component container = getContainer();
+ if (container != null)
+ return getContainer().getWidth();
+ else
+ return 640;
+ }
+ else
+ return HEIGHT;
+ }
+
+ /**
+ * Returns the same values as {@link #getMaximumSpan(int)}
+ */
+ public float getPreferredSpan(int axis)
+ {
+ return getMaximumSpan(axis);
+ }
+}