content: /*
   * Copyright 2019 FormDev Software GmbH
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package themeengine.include.com.formdev.flatlaf.ui;
  
  import java.awt.Color;
  import java.awt.Dimension;
  import java.awt.Graphics;
  import java.awt.Graphics2D;
  import java.awt.Toolkit;
  import java.awt.event.FocusListener;
  import java.awt.event.KeyAdapter;
  import java.awt.event.KeyEvent;
  import java.awt.event.KeyListener;
  import java.beans.PropertyChangeEvent;
  import javax.swing.Icon;
  import javax.swing.JComponent;
  import javax.swing.LookAndFeel;
  import javax.swing.UIManager;
  import javax.swing.plaf.ComponentUI;
  import javax.swing.plaf.basic.BasicPasswordFieldUI;
  import javax.swing.text.Caret;
  import javax.swing.text.JTextComponent;
  import themeengine.include.com.formdev.flatlaf.util.HiDPIUtils;
  
  /**
   * Provides the Flat LaF UI delegate for {@link javax.swing.JPasswordField}.
   *
   * <!-- BasicPasswordFieldUI -->
   *
   * @uiDefault PasswordField.font					Font
   * @uiDefault PasswordField.background				Color
   * @uiDefault PasswordField.foreground				Color	also used if not editable
   * @uiDefault PasswordField.caretForeground			Color
   * @uiDefault PasswordField.selectionBackground		Color
   * @uiDefault PasswordField.selectionForeground		Color
   * @uiDefault PasswordField.disabledBackground		Color	used if not enabled
   * @uiDefault PasswordField.inactiveBackground		Color	used if not editable
   * @uiDefault PasswordField.inactiveForeground		Color	used if not enabled (yes, this is confusing; this should be named disabledForeground)
   * @uiDefault PasswordField.border					Border
   * @uiDefault PasswordField.margin					Insets
   * @uiDefault PasswordField.echoChar				character
   * @uiDefault PasswordField.caretBlinkRate			int		default is 500 milliseconds
   *
   * <!-- FlatPasswordFieldUI -->
   *
   * @uiDefault Component.minimumWidth				int
   * @uiDefault Component.isIntelliJTheme				boolean
   * @uiDefault PasswordField.placeholderForeground	Color
   * @uiDefault PasswordField.capsLockIcon			Icon
   * @uiDefault TextComponent.selectAllOnFocusPolicy	String	never, once (default) or always
   *
   * @author Karl Tauber
   */
  public class FlatPasswordFieldUI
  	extends BasicPasswordFieldUI
  {
  	protected int minimumWidth;
  	protected boolean isIntelliJTheme;
  	protected Color placeholderForeground;
  	protected Icon capsLockIcon;
  
  	private FocusListener focusListener;
  	private KeyListener capsLockListener;
  
  	public static ComponentUI createUI( JComponent c ) {
  		return new FlatPasswordFieldUI();
  	}
  
  	@Override
  	protected void installDefaults() {
  		super.installDefaults();
  
  		String prefix = getPropertyPrefix();
  		minimumWidth = UIManager.getInt( "Component.minimumWidth" );
  		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
  		placeholderForeground = UIManager.getColor( prefix + ".placeholderForeground" );
  		capsLockIcon = UIManager.getIcon( "PasswordField.capsLockIcon" );
  
  		LookAndFeel.installProperty( getComponent(), "opaque", false );
  
  		MigLayoutVisualPadding.install( getComponent() );
  	}
  
  	@Override
  	protected void uninstallDefaults() {
  		super.uninstallDefaults();
  
  		placeholderForeground = null;
  		capsLockIcon = null;
  
  		MigLayoutVisualPadding.uninstall( getComponent() );
  	}
  
  	@Override
  	protected void installListeners() {
  		super.installListeners();
  
  		focusListener = new FlatUIUtils.RepaintFocusListener( getComponent() );
  		capsLockListener = new KeyAdapter() {
  			@Override
  			public void keyPressed( KeyEvent e ) {
  				repaint( e );
  			}
  			@Override
  			public void keyReleased( KeyEvent e ) {
  				repaint( e );
  			}
  			private void repaint( KeyEvent e ) {
  				if( e.getKeyCode() == KeyEvent.VK_CAPS_LOCK )
  					e.getComponent().repaint();
  			}
  		};
  
  		getComponent().addFocusListener( focusListener );
  		getComponent().addKeyListener( capsLockListener );
  	}
  
  	@Override
  	protected void uninstallListeners() {
  		super.uninstallListeners();
  
  		getComponent().removeFocusListener( focusListener );
  		getComponent().removeKeyListener( capsLockListener );
  		focusListener = null;
  		capsLockListener = null;
  	}
  
  	@Override
  	protected Caret createCaret() {
  		return new FlatCaret( UIManager.getString( "TextComponent.selectAllOnFocusPolicy" ) );
  	}
  
  	@Override
  	protected void propertyChange( PropertyChangeEvent e ) {
  		super.propertyChange( e );
  		FlatTextFieldUI.propertyChange( getComponent(), e );
  	}
  
  	@Override
  	protected void paintSafely( Graphics g ) {
  		FlatTextFieldUI.paintBackground( g, getComponent(), isIntelliJTheme );
  		FlatTextFieldUI.paintPlaceholder( g, getComponent(), placeholderForeground );
  		paintCapsLock( g );
  
  		super.paintSafely( HiDPIUtils.createGraphicsTextYCorrection( (Graphics2D) g ) );
  	}
  
  	protected void paintCapsLock( Graphics g ) {
  		JTextComponent c = getComponent();
  		if( !FlatUIUtils.isPermanentFocusOwner( c ) ||
  			!Toolkit.getDefaultToolkit().getLockingKeyState( KeyEvent.VK_CAPS_LOCK ) )
  		  return;
  
  		int y = (c.getHeight() - capsLockIcon.getIconHeight()) / 2;
  		int x = c.getWidth() - capsLockIcon.getIconWidth() - y;
  		capsLockIcon.paintIcon( c, g, x, y );
  	}
  
  	@Override
  	protected void paintBackground( Graphics g ) {
  		// background is painted elsewhere
  	}
  
  	@Override
  	public Dimension getPreferredSize( JComponent c ) {
  		return FlatTextFieldUI.applyMinimumWidth( c, super.getPreferredSize( c ), minimumWidth );
  	}
  
  	@Override
  	public Dimension getMinimumSize( JComponent c ) {
  		return FlatTextFieldUI.applyMinimumWidth( c, super.getMinimumSize( c ), minimumWidth );
  	}
  }
  