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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * 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,
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 *
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package javax.swing.plaf.synth;

import sun.swing.StringUIClientPropertyKey;
import sun.swing.MenuItemLayoutHelper;

import javax.swing.*;
import javax.swing.text.View;
import java.awt.*;

Calculates preferred size and layouts synth menu items.
All JMenuItems (and JMenus) include enough space for the insets
plus one or more elements.  When we say "label" below, we mean
"icon and/or text."
Cases to consider for SynthMenuItemUI (visualized here in a
LTR orientation; the RTL case would be reversed):
                  label
     check icon + label
     check icon + label + accelerator
                  label + accelerator
Cases to consider for SynthMenuUI (again visualized here in a
LTR orientation):
                  label + arrow
Note that in the above scenarios, accelerator and arrow icon are
mutually exclusive.  This means that if a popup menu contains a mix
of JMenus and JMenuItems, we only need to allow enough space for
max(maxAccelerator, maxArrow), and both accelerators and arrow icons
can occupy the same "column" of space in the menu.
/**
 * Calculates preferred size and layouts synth menu items.
 *
 * All JMenuItems (and JMenus) include enough space for the insets
 * plus one or more elements.  When we say "label" below, we mean
 * "icon and/or text."
 *
 * Cases to consider for SynthMenuItemUI (visualized here in a
 * LTR orientation; the RTL case would be reversed):
 *                   label
 *      check icon + label
 *      check icon + label + accelerator
 *                   label + accelerator
 *
 * Cases to consider for SynthMenuUI (again visualized here in a
 * LTR orientation):
 *                   label + arrow
 *
 * Note that in the above scenarios, accelerator and arrow icon are
 * mutually exclusive.  This means that if a popup menu contains a mix
 * of JMenus and JMenuItems, we only need to allow enough space for
 * max(maxAccelerator, maxArrow), and both accelerators and arrow icons
 * can occupy the same "column" of space in the menu.
 */
class SynthMenuItemLayoutHelper extends MenuItemLayoutHelper {

    public static final StringUIClientPropertyKey MAX_ACC_OR_ARROW_WIDTH =
            new StringUIClientPropertyKey("maxAccOrArrowWidth");

    public static final ColumnAlignment LTR_ALIGNMENT_1 =
            new ColumnAlignment(
                    SwingConstants.LEFT,
                    SwingConstants.LEFT,
                    SwingConstants.LEFT,
                    SwingConstants.RIGHT,
                    SwingConstants.RIGHT
            );
    public static final ColumnAlignment LTR_ALIGNMENT_2 =
            new ColumnAlignment(
                    SwingConstants.LEFT,
                    SwingConstants.LEFT,
                    SwingConstants.LEFT,
                    SwingConstants.LEFT,
                    SwingConstants.RIGHT
            );
    public static final ColumnAlignment RTL_ALIGNMENT_1 =
            new ColumnAlignment(
                    SwingConstants.RIGHT,
                    SwingConstants.RIGHT,
                    SwingConstants.RIGHT,
                    SwingConstants.LEFT,
                    SwingConstants.LEFT
            );
    public static final ColumnAlignment RTL_ALIGNMENT_2 =
            new ColumnAlignment(
                    SwingConstants.RIGHT,
                    SwingConstants.RIGHT,
                    SwingConstants.RIGHT,
                    SwingConstants.RIGHT,
                    SwingConstants.LEFT
            );

    private SynthContext context;
    private SynthContext accContext;
    private SynthStyle style;
    private SynthStyle accStyle;
    private SynthGraphicsUtils gu;
    private SynthGraphicsUtils accGu;
    private boolean alignAcceleratorText;
    private int maxAccOrArrowWidth;

    public SynthMenuItemLayoutHelper(SynthContext context, SynthContext accContext,
                                     JMenuItem mi, Icon checkIcon, Icon arrowIcon,
                                     Rectangle viewRect, int gap, String accDelimiter,
                                     boolean isLeftToRight, boolean useCheckAndArrow,
                                     String propertyPrefix) {
        this.context = context;
        this.accContext = accContext;
        this.style = context.getStyle();
        this.accStyle = accContext.getStyle();
        this.gu = style.getGraphicsUtils(context);
        this.accGu = accStyle.getGraphicsUtils(accContext);
        this.alignAcceleratorText = getAlignAcceleratorText(propertyPrefix);
        reset(mi, checkIcon, arrowIcon, viewRect, gap, accDelimiter,
              isLeftToRight, style.getFont(context), accStyle.getFont(accContext),
              useCheckAndArrow, propertyPrefix);
        setLeadingGap(0);
    }

    private boolean getAlignAcceleratorText(String propertyPrefix) {
        return style.getBoolean(context,
                propertyPrefix + ".alignAcceleratorText", true);
    }

    protected void calcWidthsAndHeights() {
        // iconRect
        if (getIcon() != null) {
            getIconSize().setWidth(SynthGraphicsUtils.getIconWidth(getIcon(), context));
            getIconSize().setHeight(SynthGraphicsUtils.getIconHeight(getIcon(), context));
        }

        // accRect
        if (!getAccText().equals("")) {
             getAccSize().setWidth(accGu.computeStringWidth(getAccContext(),
                    getAccFontMetrics().getFont(), getAccFontMetrics(),
                    getAccText()));
            getAccSize().setHeight(getAccFontMetrics().getHeight());
        }

        // textRect
        if (getText() == null) {
            setText("");
        } else if (!getText().equals("")) {
            if (getHtmlView() != null) {
                // Text is HTML
                getTextSize().setWidth(
                        (int) getHtmlView().getPreferredSpan(View.X_AXIS));
                getTextSize().setHeight(
                        (int) getHtmlView().getPreferredSpan(View.Y_AXIS));
            } else {
                // Text isn't HTML
                getTextSize().setWidth(gu.computeStringWidth(context,
                        getFontMetrics().getFont(), getFontMetrics(),
                        getText()));
                getTextSize().setHeight(getFontMetrics().getHeight());
            }
        }

        if (useCheckAndArrow()) {
            // checkIcon
            if (getCheckIcon() != null) {
                getCheckSize().setWidth(
                        SynthGraphicsUtils.getIconWidth(getCheckIcon(), context));
                getCheckSize().setHeight(
                        SynthGraphicsUtils.getIconHeight(getCheckIcon(), context));
            }
            // arrowRect
            if (getArrowIcon() != null) {
                getArrowSize().setWidth(
                        SynthGraphicsUtils.getIconWidth(getArrowIcon(), context));
                getArrowSize().setHeight(
                        SynthGraphicsUtils.getIconHeight(getArrowIcon(), context));
            }
        }

        // labelRect
        if (isColumnLayout()) {
            getLabelSize().setWidth(getIconSize().getWidth()
                    + getTextSize().getWidth() + getGap());
            getLabelSize().setHeight(MenuItemLayoutHelper.max(
                    getCheckSize().getHeight(),
                    getIconSize().getHeight(),
                    getTextSize().getHeight(),
                    getAccSize().getHeight(),
                    getArrowSize().getHeight()));
        } else {
            Rectangle textRect = new Rectangle();
            Rectangle iconRect = new Rectangle();
            gu.layoutText(context, getFontMetrics(), getText(), getIcon(),
                    getHorizontalAlignment(), getVerticalAlignment(),
                    getHorizontalTextPosition(), getVerticalTextPosition(),
                    getViewRect(), iconRect, textRect, getGap());
            textRect.width += getLeftTextExtraWidth();
            Rectangle labelRect = iconRect.union(textRect);
            getLabelSize().setHeight(labelRect.height);
            getLabelSize().setWidth(labelRect.width);
        }
    }

    protected void calcMaxWidths() {
        calcMaxWidth(getCheckSize(), MAX_CHECK_WIDTH);
        maxAccOrArrowWidth =
                calcMaxValue(MAX_ACC_OR_ARROW_WIDTH, getArrowSize().getWidth());
        maxAccOrArrowWidth =
                calcMaxValue(MAX_ACC_OR_ARROW_WIDTH, getAccSize().getWidth());

        if (isColumnLayout()) {
            calcMaxWidth(getIconSize(), MAX_ICON_WIDTH);
            calcMaxWidth(getTextSize(), MAX_TEXT_WIDTH);
            int curGap = getGap();
            if ((getIconSize().getMaxWidth() == 0)
                    || (getTextSize().getMaxWidth() == 0)) {
                curGap = 0;
            }
            getLabelSize().setMaxWidth(
                    calcMaxValue(MAX_LABEL_WIDTH, getIconSize().getMaxWidth()
                            + getTextSize().getMaxWidth() + curGap));
        } else {
            // We shouldn't use current icon and text widths
            // in maximal widths calculation for complex layout.
            getIconSize().setMaxWidth(getParentIntProperty(
                    MAX_ICON_WIDTH));
            calcMaxWidth(getLabelSize(), MAX_LABEL_WIDTH);
            // If maxLabelWidth is wider
            // than the widest icon + the widest text + gap,
            // we should update the maximal text witdh
            int candidateTextWidth = getLabelSize().getMaxWidth() -
                    getIconSize().getMaxWidth();
            if (getIconSize().getMaxWidth() > 0) {
                candidateTextWidth -= getGap();
            }
            getTextSize().setMaxWidth(calcMaxValue(
                    MAX_TEXT_WIDTH, candidateTextWidth));
        }
    }

    public SynthContext getContext() {
        return context;
    }

    public SynthContext getAccContext() {
        return accContext;
    }

    public SynthStyle getStyle() {
        return style;
    }

    public SynthStyle getAccStyle() {
        return accStyle;
    }

    public SynthGraphicsUtils getGraphicsUtils() {
        return gu;
    }

    public SynthGraphicsUtils getAccGraphicsUtils() {
        return accGu;
    }

    public boolean alignAcceleratorText() {
        return alignAcceleratorText;
    }

    public int getMaxAccOrArrowWidth() {
        return maxAccOrArrowWidth;
    }

    protected void prepareForLayout(LayoutResult lr) {
        lr.getCheckRect().width = getCheckSize().getMaxWidth();
        // An item can have an arrow or a check icon at once
        if (useCheckAndArrow() && (!"".equals(getAccText()))) {
            lr.getAccRect().width = maxAccOrArrowWidth;
        } else {
            lr.getArrowRect().width = maxAccOrArrowWidth;
        }
    }

    public ColumnAlignment getLTRColumnAlignment() {
        if (alignAcceleratorText()) {
            return LTR_ALIGNMENT_2;
        } else {
            return LTR_ALIGNMENT_1;
        }
    }

    public ColumnAlignment getRTLColumnAlignment() {
        if (alignAcceleratorText()) {
            return RTL_ALIGNMENT_2;
        } else {
            return RTL_ALIGNMENT_1;
        }
    }

    protected void layoutIconAndTextInLabelRect(LayoutResult lr) {
        lr.setTextRect(new Rectangle());
        lr.setIconRect(new Rectangle());
        gu.layoutText(context, getFontMetrics(), getText(), getIcon(),
                getHorizontalAlignment(), getVerticalAlignment(),
                getHorizontalTextPosition(), getVerticalTextPosition(),
                lr.getLabelRect(), lr.getIconRect(), lr.getTextRect(), getGap());
    }
}