/*

 * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package javax.swing.plaf.synth;

import java.awt.*;

import java.beans.*;

import java.io.*;

import java.lang.ref.*;

import java.net.*;

import java.security.*;

import java.text.*;

import java.util.*;

import javax.swing.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.*;

import sun.awt.*;

import sun.security.action.*;

import sun.swing.*;

import sun.swing.plaf.synth.*;

/**

 * SynthLookAndFeel provides the basis for creating a customized look and

 * feel. SynthLookAndFeel does not directly provide a look, all painting is

 * delegated.

 * You need to either provide a configuration file, by way of the

 * {@link #load} method, or provide your own {@link SynthStyleFactory}

 * to {@link #setStyleFactory}. Refer to the

 * <a href="package-summary.html">package summary</a> for an example of

 * loading a file, and {@link javax.swing.plaf.synth.SynthStyleFactory} for

 * an example of providing your own <code>SynthStyleFactory</code> to

 * <code>setStyleFactory</code>.

 * <p>

 * {@link SynthIcon} interface provides

 * {@code paintIcon(synthContext, graphics, x, y, width, height)} method that

 * allows to draw the icon with the given {@code SynthContext}.

 * <p>

 * <strong>Warning:</strong>

 * This class implements {@link Serializable} as a side effect of it

 * extending {@link BasicLookAndFeel}. It is not intended to be serialized.

 * An attempt to serialize it will

 * result in {@link NotSerializableException}.

 *

 * @serial exclude

 * @since 1.5

 * @author Scott Violet

 */

@SuppressWarnings("serial") // Per above comment, not actually serializable

public class SynthLookAndFeel extends BasicLookAndFeel {

    /**

     * Used in a handful of places where we need an empty Insets.

     */

    static final Insets EMPTY_UIRESOURCE_INSETS = new InsetsUIResource(

                                                            0, 0, 0, 0);

    /**

     * AppContext key to get the current SynthStyleFactory.

     */

    private static final Object STYLE_FACTORY_KEY =

                  new StringBuffer("com.sun.java.swing.plaf.gtk.StyleCache");

    /**

     * AppContext key to get selectedUI.

     */

    private static final Object SELECTED_UI_KEY = new StringBuilder("selectedUI");

    /**

     * AppContext key to get selectedUIState.

     */

    private static final Object SELECTED_UI_STATE_KEY = new StringBuilder("selectedUIState");

    /**

     * The last SynthStyleFactory that was asked for from AppContext

     * <code>lastContext</code>.

     */

    private static SynthStyleFactory lastFactory;

    /**

     * AppContext lastLAF came from.

     */

    private static AppContext lastContext;

    /**

     * SynthStyleFactory for the this SynthLookAndFeel.

     */

    private SynthStyleFactory factory;

    /**

     * Map of defaults table entries. This is populated via the load

     * method.

     */

    private Map<String, Object> defaultsMap;

    private Handler _handler;

    static ComponentUI getSelectedUI() {

        return (ComponentUI) AppContext.getAppContext().get(SELECTED_UI_KEY);

    }

    /**

     * Used by the renderers. For the most part the renderers are implemented

     * as Labels, which is problematic in so far as they are never selected.

     * To accommodate this SynthLabelUI checks if the current

     * UI matches that of <code>selectedUI</code> (which this methods sets), if

     * it does, then a state as set by this method is returned. This provides

     * a way for labels to have a state other than selected.

     */

    static void setSelectedUI(ComponentUI uix, boolean selected,

                              boolean focused, boolean enabled,

                              boolean rollover) {

        int selectedUIState = 0;

        if (selected) {

            selectedUIState = SynthConstants.SELECTED;

            if (focused) {

                selectedUIState |= SynthConstants.FOCUSED;

            }

        }

        else if (rollover && enabled) {

            selectedUIState |=

                    SynthConstants.MOUSE_OVER | SynthConstants.ENABLED;

            if (focused) {

                selectedUIState |= SynthConstants.FOCUSED;

            }

        }

        else {

            if (enabled) {

                selectedUIState |= SynthConstants.ENABLED;

                if (focused) {

                    selectedUIState |= SynthConstants.FOCUSED;

                }

            }

            else {

                selectedUIState |= SynthConstants.DISABLED;

            }

        }

        AppContext context = AppContext.getAppContext();

        context.put(SELECTED_UI_KEY, uix);

        context.put(SELECTED_UI_STATE_KEY, Integer.valueOf(selectedUIState));

    }

    static int getSelectedUIState() {

        Integer result = (Integer) AppContext.getAppContext().get(SELECTED_UI_STATE_KEY);

        return result == null ? 0 : result.intValue();

    }

    /**

     * Clears out the selected UI that was last set in setSelectedUI.

     */

    static void resetSelectedUI() {

        AppContext.getAppContext().remove(SELECTED_UI_KEY);

    }

    /**

     * Sets the SynthStyleFactory that the UI classes provided by

     * synth will use to obtain a SynthStyle.

     *

     * @param cache SynthStyleFactory the UIs should use.

     */

    public static void setStyleFactory(SynthStyleFactory cache) {

        // We assume the setter is called BEFORE the getter has been invoked

        // for a particular AppContext.

        synchronized(SynthLookAndFeel.class) {

            AppContext context = AppContext.getAppContext();

            lastFactory = cache;

            lastContext = context;

            context.put(STYLE_FACTORY_KEY, cache);

        }

    }

    /**

     * Returns the current SynthStyleFactory.

     *

     * @return SynthStyleFactory

     */

    public static SynthStyleFactory getStyleFactory() {

        synchronized(SynthLookAndFeel.class) {

            AppContext context = AppContext.getAppContext();

            if (lastContext == context) {

                return lastFactory;

            }

            lastContext = context;

            lastFactory = (SynthStyleFactory) context.get(STYLE_FACTORY_KEY);

            return lastFactory;

        }

    }

    /**

     * Returns the component state for the specified component. This should

     * only be used for Components that don't have any special state beyond

     * that of ENABLED, DISABLED or FOCUSED. For example, buttons shouldn't

     * call into this method.

     */

    static int getComponentState(Component c) {

        if (c.isEnabled()) {

            if (c.isFocusOwner()) {

                return SynthUI.ENABLED | SynthUI.FOCUSED;

            }

            return SynthUI.ENABLED;

        }

        return SynthUI.DISABLED;

    }

    /**

     * Gets a SynthStyle for the specified region of the specified component.

     * This is not for general consumption, only custom UIs should call this

     * method.

     *

     * @param c JComponent to get the SynthStyle for

     * @param region Identifies the region of the specified component

     * @return SynthStyle to use.

     */

    public static SynthStyle getStyle(JComponent c, Region region) {

        return getStyleFactory().getStyle(c, region);

    }

    /**

     * Returns true if the Style should be updated in response to the

     * specified PropertyChangeEvent. This forwards to

     * <code>shouldUpdateStyleOnAncestorChanged</code> as necessary.

     */

    static boolean shouldUpdateStyle(PropertyChangeEvent event) {

        LookAndFeel laf = UIManager.getLookAndFeel();

        return (laf instanceof SynthLookAndFeel &&

                ((SynthLookAndFeel) laf).shouldUpdateStyleOnEvent(event));

    }

    /**

     * A convience method that will reset the Style of StyleContext if

     * necessary.

     *

     * @return newStyle

     */

    static SynthStyle updateStyle(SynthContext context, SynthUI ui) {

        SynthStyle newStyle = getStyle(context.getComponent(),

                                       context.getRegion());

        SynthStyle oldStyle = context.getStyle();

        if (newStyle != oldStyle) {

            if (oldStyle != null) {

                oldStyle.uninstallDefaults(context);

            }

            context.setStyle(newStyle);

            newStyle.installDefaults(context, ui);

        }

        return newStyle;

    }

    /**

     * Updates the style associated with <code>c</code>, and all its children.

     * This is a lighter version of

     * <code>SwingUtilities.updateComponentTreeUI</code>.

     *

     * @param c Component to update style for.

     */

    public static void updateStyles(Component c) {

        if (c instanceof JComponent) {

            // Yes, this is hacky. A better solution is to get the UI

            // and cast, but JComponent doesn't expose a getter for the UI

            // (each of the UIs do), making that approach impractical.

            String name = c.getName();

            c.setName(null);

            if (name != null) {

                c.setName(name);

            }

            ((JComponent)c).revalidate();

        }

        Component[] children = null;

        if (c instanceof JMenu) {

            children = ((JMenu)c).getMenuComponents();

        }

        else if (c instanceof Container) {

            children = ((Container)c).getComponents();

        }

        if (children != null) {

            for (Component child : children) {

                updateStyles(child);

            }

        }

        c.repaint();

    }

    /**

     * Returns the Region for the JComponent <code>c</code>.

     *

     * @param c JComponent to fetch the Region for

     * @return Region corresponding to <code>c</code>

     */

    public static Region getRegion(JComponent c) {

        return Region.getRegion(c);

    }

    /**

     * A convenience method to return where the foreground should be

     * painted for the Component identified by the passed in

     * AbstractSynthContext.

     */

    static Insets getPaintingInsets(SynthContext state, Insets insets) {

        if (state.isSubregion()) {

            insets = state.getStyle().getInsets(state, insets);

        }

        else {

            insets = state.getComponent().getInsets(insets);

        }

        return insets;

    }

    /**

     * A convenience method that handles painting of the background.

     * All SynthUI implementations should override update and invoke

     * this method.

     */

    static void update(SynthContext state, Graphics g) {

        paintRegion(state, g, null);

    }

    /**

     * A convenience method that handles painting of the background for

     * subregions. All SynthUI's that have subregions should invoke

     * this method, than paint the foreground.

     */

    static void updateSubregion(SynthContext state, Graphics g,

                                Rectangle bounds) {

        paintRegion(state, g, bounds);

    }

    private static void paintRegion(SynthContext state, Graphics g,

                                    Rectangle bounds) {

        JComponent c = state.getComponent();

        SynthStyle style = state.getStyle();

        int x, y, width, height;

        if (bounds == null) {

            x = 0;

            y = 0;

            width = c.getWidth();

            height = c.getHeight();

        }

        else {

            x = bounds.x;

            y = bounds.y;

            width = bounds.width;

            height = bounds.height;

        }

        // Fill in the background, if necessary.

        boolean subregion = state.isSubregion();

        if ((subregion && style.isOpaque(state)) ||

                          (!subregion && c.isOpaque())) {

            g.setColor(style.getColor(state, ColorType.BACKGROUND));

            g.fillRect(x, y, width, height);

        }

    }

    static boolean isLeftToRight(Component c) {

        return c.getComponentOrientation().isLeftToRight();

    }

    /**

     * Returns the ui that is of type <code>klass</code>, or null if

     * one can not be found.

     */

    static Object getUIOfType(ComponentUI ui, Class<?> klass) {

        if (klass.isInstance(ui)) {

            return ui;

        }

        return null;

    }

    /**

     * Creates the Synth look and feel <code>ComponentUI</code> for

     * the passed in <code>JComponent</code>.

     *

     * @param c JComponent to create the <code>ComponentUI</code> for

     * @return ComponentUI to use for <code>c</code>

     */

    public static ComponentUI createUI(JComponent c) {

        String key = c.getUIClassID().intern();

        if (key == "ButtonUI") {

            return SynthButtonUI.createUI(c);

        }

        else if (key == "CheckBoxUI") {

            return SynthCheckBoxUI.createUI(c);

        }

        else if (key == "CheckBoxMenuItemUI") {

            return SynthCheckBoxMenuItemUI.createUI(c);

        }

        else if (key == "ColorChooserUI") {

            return SynthColorChooserUI.createUI(c);

        }

        else if (key == "ComboBoxUI") {

            return SynthComboBoxUI.createUI(c);

        }

        else if (key == "DesktopPaneUI") {

            return SynthDesktopPaneUI.createUI(c);

        }

        else if (key == "DesktopIconUI") {

            return SynthDesktopIconUI.createUI(c);

        }

        else if (key == "EditorPaneUI") {

            return SynthEditorPaneUI.createUI(c);

        }

        else if (key == "FileChooserUI") {

            return SynthFileChooserUI.createUI(c);

        }

        else if (key == "FormattedTextFieldUI") {

            return SynthFormattedTextFieldUI.createUI(c);

        }

        else if (key == "InternalFrameUI") {

            return SynthInternalFrameUI.createUI(c);

        }

        else if (key == "LabelUI") {

            return SynthLabelUI.createUI(c);

        }

        else if (key == "ListUI") {

            return SynthListUI.createUI(c);

        }

        else if (key == "MenuBarUI") {

            return SynthMenuBarUI.createUI(c);

        }

        else if (key == "MenuUI") {

            return SynthMenuUI.createUI(c);

        }

        else if (key == "MenuItemUI") {

            return SynthMenuItemUI.createUI(c);

        }

        else if (key == "OptionPaneUI") {

            return SynthOptionPaneUI.createUI(c);

        }

        else if (key == "PanelUI") {

            return SynthPanelUI.createUI(c);

        }

        else if (key == "PasswordFieldUI") {

            return SynthPasswordFieldUI.createUI(c);

        }

        else if (key == "PopupMenuSeparatorUI") {

            return SynthSeparatorUI.createUI(c);

        }

        else if (key == "PopupMenuUI") {

            return SynthPopupMenuUI.createUI(c);

        }

        else if (key == "ProgressBarUI") {

            return SynthProgressBarUI.createUI(c);

        }

        else if (key == "RadioButtonUI") {

            return SynthRadioButtonUI.createUI(c);

        }

        else if (key == "RadioButtonMenuItemUI") {

            return SynthRadioButtonMenuItemUI.createUI(c);

        }

        else if (key == "RootPaneUI") {

            return SynthRootPaneUI.createUI(c);

        }

        else if (key == "ScrollBarUI") {

            return SynthScrollBarUI.createUI(c);

        }

        else if (key == "ScrollPaneUI") {

            return SynthScrollPaneUI.createUI(c);

        }

        else if (key == "SeparatorUI") {

            return SynthSeparatorUI.createUI(c);

        }

        else if (key == "SliderUI") {

            return SynthSliderUI.createUI(c);

        }

        else if (key == "SpinnerUI") {

            return SynthSpinnerUI.createUI(c);

        }

        else if (key == "SplitPaneUI") {

            return SynthSplitPaneUI.createUI(c);

        }

        else if (key == "TabbedPaneUI") {

            return SynthTabbedPaneUI.createUI(c);

        }

        else if (key == "TableUI") {

            return SynthTableUI.createUI(c);

        }

        else if (key == "TableHeaderUI") {

            return SynthTableHeaderUI.createUI(c);

        }

        else if (key == "TextAreaUI") {

            return SynthTextAreaUI.createUI(c);

        }

        else if (key == "TextFieldUI") {

            return SynthTextFieldUI.createUI(c);

        }

        else if (key == "TextPaneUI") {

            return SynthTextPaneUI.createUI(c);

        }

        else if (key == "ToggleButtonUI") {

            return SynthToggleButtonUI.createUI(c);

        }

        else if (key == "ToolBarSeparatorUI") {

            return SynthSeparatorUI.createUI(c);

        }