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+/* FieldView.java --
+ Copyright (C) 2004 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;
+
+import java.awt.Component;
+import java.awt.ComponentOrientation;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Shape;
+
+import javax.swing.JTextField;
+import javax.swing.event.DocumentEvent;
+
+public class FieldView extends PlainView
+{
+ public FieldView(Element elem)
+ {
+ super(elem);
+ }
+
+ protected FontMetrics getFontMetrics()
+ {
+ Component container = getContainer();
+ return container.getFontMetrics(container.getFont());
+ }
+
+ /**
+ * Vertically centers the single line of text within the
+ * bounds of the input shape. The returned Rectangle is centered
+ * vertically within <code>shape</code> and has a height of the
+ * preferred span along the Y axis. Horizontal adjustment is done according
+ * to the horizontalAligment property of the component that is rendered.
+ *
+ * @param shape the shape within which the line is beeing centered
+ */
+ protected Shape adjustAllocation(Shape shape)
+ {
+ Rectangle rectIn = shape.getBounds();
+ // vertical adjustment
+ int height = (int) getPreferredSpan(Y_AXIS);
+ int y = rectIn.y + (rectIn.height - height) / 2;
+ // horizontal adjustment
+ JTextField textField = (JTextField) getContainer();
+ int halign = textField.getHorizontalAlignment();
+ int width = (int) getPreferredSpan(X_AXIS);
+ int x;
+ ComponentOrientation orientation = textField.getComponentOrientation();
+ switch (halign)
+ {
+ case JTextField.CENTER:
+ x = rectIn.x + (rectIn.width - width) / 2;
+ break;
+ case JTextField.RIGHT:
+ x = rectIn.x + (rectIn.width - width);
+ break;
+ case JTextField.TRAILING:
+ if (orientation.isLeftToRight())
+ x = rectIn.x + (rectIn.width - width);
+ else
+ x = rectIn.x;
+ break;
+ case JTextField.LEADING:
+ if (orientation.isLeftToRight())
+ x = rectIn.x;
+ else
+ x = rectIn.x + (rectIn.width - width);
+ break;
+ case JTextField.LEFT:
+ default:
+ x = rectIn.x;
+ break;
+ }
+ return new Rectangle(x, y, width, height);
+ }
+
+ public float getPreferredSpan(int axis)
+ {
+ if (axis != X_AXIS && axis != Y_AXIS)
+ throw new IllegalArgumentException();
+
+ FontMetrics fm = getFontMetrics();
+
+ if (axis == Y_AXIS)
+ return fm.getHeight();
+
+ String text;
+ Element elem = getElement();
+
+ try
+ {
+ text = elem.getDocument().getText(elem.getStartOffset(),
+ elem.getEndOffset());
+ }
+ catch (BadLocationException e)
+ {
+ // This should never happen.
+ text = "";
+ }
+
+ return fm.stringWidth(text);
+ }
+
+ public int getResizeWeight(int axis)
+ {
+ return axis = axis == X_AXIS ? 1 : 0;
+ }
+
+ public Shape modelToView(int pos, Shape a, Position.Bias bias)
+ throws BadLocationException
+ {
+ Shape newAlloc = adjustAllocation(a);
+ return super.modelToView(pos, newAlloc, bias);
+ }
+
+ public void paint(Graphics g, Shape s)
+ {
+ Shape newAlloc = adjustAllocation(s);
+ super.paint(g, newAlloc);
+ }
+
+ public void insertUpdate(DocumentEvent ev, Shape shape, ViewFactory vf)
+ {
+ Shape newAlloc = adjustAllocation(shape);
+ super.insertUpdate(ev, newAlloc, vf);
+ }
+
+ public void removeUpdate(DocumentEvent ev, Shape shape, ViewFactory vf)
+ {
+ Shape newAlloc = adjustAllocation(shape);
+ super.removeUpdate(ev, newAlloc, vf);
+ }
+
+ public void changedUpdate(DocumentEvent ev, Shape shape, ViewFactory vf)
+ {
+ Shape newAlloc = adjustAllocation(shape);
+ super.removeUpdate(ev, newAlloc, vf);
+ }
+
+}
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