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Diffstat (limited to 'libjava/classpath/javax/swing/text/PasswordView.java')
-rw-r--r-- | libjava/classpath/javax/swing/text/PasswordView.java | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/text/PasswordView.java b/libjava/classpath/javax/swing/text/PasswordView.java new file mode 100644 index 00000000000..229fd2b508d --- /dev/null +++ b/libjava/classpath/javax/swing/text/PasswordView.java @@ -0,0 +1,170 @@ +/* PasswordView.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.Color; +import java.awt.Graphics; + +import javax.swing.JPasswordField; + +public class PasswordView extends FieldView +{ + /** + * Buffer for putting the echo char into it and + * then using it to draw it into the view. + */ + private char[] oneCharBuffer = new char[1]; + + public PasswordView(Element elem) + { + super(elem); + } + + /** + * Draws one echo character at a given position. + * + * @param g the <code>Graphics</code> object to draw to + * @param x the x-position + * @param y the y-position + * @param ch the echo character + * + * @return the next x position right of the drawn character + */ + protected int drawEchoCharacter(Graphics g, int x, int y, char ch) + { + // Update font metrics. + updateMetrics(); + + // Draw character. + oneCharBuffer[0] = ch; + g.drawChars(oneCharBuffer, 0, 1, x, y); + + // Return new x position right of drawn character. + return x + metrics.charWidth(ch); + } + + private char getEchoChar() + { + char ch = ((JPasswordField) getContainer()).getEchoChar(); + + if (ch == 0) + ch = '*'; + + return ch; + } + + /** + * Draws selected text at a given position. + * + * @param g the <code>Graphics</code> object to draw to + * @param x the x-position + * @param y the y-position + * @param p0 the position of the first character to draw + * @param p1 the position of the first character not to draw + * + * @return the next x position right of the drawn character + */ + protected int drawSelectedText(Graphics g, int x, int y, int p0, int p1) + throws BadLocationException + { + // FIXME: Throw BadLocationException somehow. + + // Update font metrics. + updateMetrics(); + + // Get echo character. + char ch = getEchoChar(); + + // Set color for selected text. + g.setColor(selectedColor); + g.setColor(Color.BLACK); + + // Initialize buffer for faster drawing of all characters. + int len = p1 - p0; + char[] buffer = new char[len]; + for (int index = 0; index < len; ++index) + buffer[index] = ch; + + // Draw echo charaters. + g.drawChars(buffer, 0, len, x, y); + + // Return new x position right of all drawn characters. + return x + len * metrics.charWidth(ch); + } + + /** + * Draws unselected text at a given position. + * + * @param g the <code>Graphics</code> object to draw to + * @param x the x-position + * @param y the y-position + * @param p0 the position of the first character to draw + * @param p1 the position of the first character not to draw + * + * @return the next x position right of the drawn character + */ + protected int drawUnselectedText(Graphics g, int x, int y, int p0, int p1) + throws BadLocationException + { + // FIXME: Throw BadLocationException somehow. + + // Update font metrics. + updateMetrics(); + + // Get echo character. + char ch = getEchoChar(); + + // Set color for unselected text. + g.setColor(unselectedColor); + g.setColor(Color.BLACK); + + // Initialize buffer for faster drawing of all characters. + int len = p1 - p0; + char[] buffer = new char[len]; + for (int index = 0; index < len; ++index) + buffer[index] = ch; + + // Draw echo charaters. + g.drawChars(buffer, 0, len, x, y); + + // Return new x position right of all drawn characters. + return x + len * metrics.charWidth(ch); + } +} + |