/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.netbeans.swing.tabcontrol.plaf;

import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.util.HashMap;
import java.util.Map;
import javax.swing.Icon;
import javax.swing.JComponent;
import org.netbeans.swing.tabcontrol.TabDisplayer;

/**
 * Common implementation of Windows Vista and Windows 8 impl of editor tabs ui
 *
 * @author S. Aubrecht
 * @since 1.41
 */
abstract class AbstractWinEditorTabDisplayerUI extends BasicScrollingTabDisplayerUI {
    
    private static final Rectangle scratch5 = new Rectangle();
    private static Map<Integer, String[]> buttonIconPaths;

    public AbstractWinEditorTabDisplayerUI(TabDisplayer displayer) {
        super (displayer);
    }

    @Override
    public Dimension getPreferredSize(JComponent c) {
        int prefHeight = 22;
        Graphics g = BasicScrollingTabDisplayerUI.getOffscreenGraphics();
        if (g != null) {
            FontMetrics fm = g.getFontMetrics(displayer.getFont());
            Insets ins = getTabAreaInsets();
            prefHeight = fm.getHeight() + ins.top + ins.bottom + 6;
        }
        return new Dimension(displayer.getWidth(), prefHeight);
    }
    
    @Override
    public void paintBackground (Graphics g) {
        g.setColor (displayer.getBackground());
        g.fillRect (0, 0, displayer.getWidth(), displayer.getHeight());
    }

    @Override
    protected void paintAfterTabs(Graphics g) {
        Rectangle r = new Rectangle();
        getTabsVisibleArea(r);
        r.width = displayer.getWidth();

        Insets ins = getTabAreaInsets();

        int y = displayer.getHeight() - WinVistaEditorTabCellRenderer.BOTTOM_INSET;
        int tabsWidth = getTabsAreaWidth();

        g.setColor(WinVistaEditorTabCellRenderer.getBorderColor());
        
        //Draw a line tracking the bottom of the tabs under the control
        //buttons, out to the right edge of the control
        
        //Find the last visible tab
        int last = scroll().getLastVisibleTab(tabsWidth);
        int l = 0;
        if (last >= 0) {
            //If it's onscreen (usually will be unless there are no tabs,
            //find the edge of the last tab - it may be scrolled)
            getTabRect(last, scratch5);
            last = scratch5.x + scratch5.width;
        }
        //Draw the dark line under the controls button area that closes the
        //tabs bottom margin on top
        g.drawLine(last, y - 1, displayer.getWidth(), y - 1);
    }

    @Override
    protected Rectangle getTabRectForRepaint( int tab, Rectangle rect ) {
        Rectangle res = super.getTabRectForRepaint( tab, rect );
        //we need to repaint extra vertical lines on both sides when mouse-over 
        //or selection changes
        res.x--;
        res.width += 2;
        return res;
    }

    private static void initIcons() {
        if( null == buttonIconPaths ) {
            buttonIconPaths = new HashMap<Integer, String[]>(7);
            
            //left button
            String[] iconPaths = new String[4];
            iconPaths[TabControlButton.STATE_DEFAULT] = "org/netbeans/swing/tabcontrol/resources/vista_scrollleft_enabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_DISABLED] = "org/netbeans/swing/tabcontrol/resources/vista_scrollleft_disabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_ROLLOVER] = "org/netbeans/swing/tabcontrol/resources/vista_scrollleft_rollover.png"; // NOI18N
            iconPaths[TabControlButton.STATE_PRESSED] = "org/netbeans/swing/tabcontrol/resources/vista_scrollleft_pressed.png"; // NOI18N
            buttonIconPaths.put( TabControlButton.ID_SCROLL_LEFT_BUTTON, iconPaths );
            
            //right button
            iconPaths = new String[4];
            iconPaths[TabControlButton.STATE_DEFAULT] = "org/netbeans/swing/tabcontrol/resources/vista_scrollright_enabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_DISABLED] = "org/netbeans/swing/tabcontrol/resources/vista_scrollright_disabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_ROLLOVER] = "org/netbeans/swing/tabcontrol/resources/vista_scrollright_rollover.png"; // NOI18N
            iconPaths[TabControlButton.STATE_PRESSED] = "org/netbeans/swing/tabcontrol/resources/vista_scrollright_pressed.png"; // NOI18N
            buttonIconPaths.put( TabControlButton.ID_SCROLL_RIGHT_BUTTON, iconPaths );
            
            //drop down button
            iconPaths = new String[4];
            iconPaths[TabControlButton.STATE_DEFAULT] = "org/netbeans/swing/tabcontrol/resources/vista_popup_enabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_DISABLED] = iconPaths[TabControlButton.STATE_DEFAULT];
            iconPaths[TabControlButton.STATE_ROLLOVER] = "org/netbeans/swing/tabcontrol/resources/vista_popup_rollover.png"; // NOI18N
            iconPaths[TabControlButton.STATE_PRESSED] = "org/netbeans/swing/tabcontrol/resources/vista_popup_pressed.png"; // NOI18N
            buttonIconPaths.put( TabControlButton.ID_DROP_DOWN_BUTTON, iconPaths );
            
            //maximize/restore button
            iconPaths = new String[4];
            iconPaths[TabControlButton.STATE_DEFAULT] = "org/netbeans/swing/tabcontrol/resources/vista_maximize_enabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_DISABLED] = iconPaths[TabControlButton.STATE_DEFAULT];
            iconPaths[TabControlButton.STATE_ROLLOVER] = "org/netbeans/swing/tabcontrol/resources/vista_maximize_rollover.png"; // NOI18N
            iconPaths[TabControlButton.STATE_PRESSED] = "org/netbeans/swing/tabcontrol/resources/vista_maximize_pressed.png"; // NOI18N
            buttonIconPaths.put( TabControlButton.ID_MAXIMIZE_BUTTON, iconPaths );
            
            iconPaths = new String[4];
            iconPaths[TabControlButton.STATE_DEFAULT] = "org/netbeans/swing/tabcontrol/resources/vista_restore_enabled.png"; // NOI18N
            iconPaths[TabControlButton.STATE_DISABLED] = iconPaths[TabControlButton.STATE_DEFAULT];
            iconPaths[TabControlButton.STATE_ROLLOVER] = "org/netbeans/swing/tabcontrol/resources/vista_restore_rollover.png"; // NOI18N
            iconPaths[TabControlButton.STATE_PRESSED] = "org/netbeans/swing/tabcontrol/resources/vista_restore_pressed.png"; // NOI18N
            buttonIconPaths.put( TabControlButton.ID_RESTORE_BUTTON, iconPaths );
        }
    }

    @Override
    public Icon getButtonIcon(int buttonId, int buttonState) {
        Icon res = null;
        initIcons();
        String[] paths = buttonIconPaths.get( buttonId );
        if( null != paths && buttonState >=0 && buttonState < paths.length ) {
            res = TabControlButtonFactory.getIcon( paths[buttonState] );
        }
        return res;
    }
}
