JDK14/Java14源码在线阅读

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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
 * 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,
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 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.apple.laf;

import java.awt.*;
import java.beans.PropertyVetoException;

import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.UIResource;

import sun.swing.SwingUtilities2;

import apple.laf.*;
import apple.laf.JRSUIConstants.*;
import apple.laf.JRSUIState.TitleBarHeightState;

import com.apple.laf.AquaUtils.RecyclableSingleton;
import com.apple.laf.AquaInternalFrameBorderMetrics;
import java.awt.geom.AffineTransform;

public class AquaInternalFrameBorder implements Border, UIResource {
    private static final int kCloseButton = 0;
    private static final int kIconButton = 1;
    private static final int kGrowButton = 2;

    private static final int sMaxIconWidth = 15;
    private static final int sMaxIconHeight = sMaxIconWidth;
    private static final int sAfterButtonPad = 11;
    private static final int sAfterIconPad = 5;
    private static final int sRightSideTitleClip = 0;

    private static final int kContentTester = 100; // For getting region insets

    private static final RecyclableSingleton<AquaInternalFrameBorder> documentWindowFrame = new RecyclableSingleton<AquaInternalFrameBorder>() {
        protected AquaInternalFrameBorder getInstance() {
            return new AquaInternalFrameBorder(WindowType.DOCUMENT);
        }
    };
    protected static AquaInternalFrameBorder window() {
        return documentWindowFrame.get();
    }

    private static final RecyclableSingleton<AquaInternalFrameBorder> utilityWindowFrame = new RecyclableSingleton<AquaInternalFrameBorder>() {
        protected AquaInternalFrameBorder getInstance() {
            return new AquaInternalFrameBorder(WindowType.UTILITY);
        }
    };
    protected static AquaInternalFrameBorder utility() {
        return utilityWindowFrame.get();
    }

    private static final RecyclableSingleton<AquaInternalFrameBorder> dialogWindowFrame = new RecyclableSingleton<AquaInternalFrameBorder>() {
        protected AquaInternalFrameBorder getInstance() {
            return new AquaInternalFrameBorder(WindowType.DOCUMENT);
        }
    };
    protected static AquaInternalFrameBorder dialog() {
        return dialogWindowFrame.get();
    }

    private final AquaInternalFrameBorderMetrics metrics;

    private final int fThisButtonSpan;
    private final int fThisLeftSideTotal;

    private final boolean fIsUtility;

    // Instance variables
    private final WindowType fWindowKind; // Which kind of window to draw
    private Insets fBorderInsets; // Cached insets object

    private Color selectedTextColor;
    private Color notSelectedTextColor;

    private Rectangle fInBounds; // Cached bounds rect object

    protected final AquaPainter<TitleBarHeightState> titleBarPainter = AquaPainter.create(JRSUIStateFactory.getTitleBar());
    protected final AquaPainter<JRSUIState> widgetPainter = AquaPainter.create(JRSUIState.getInstance());

    protected AquaInternalFrameBorder(final WindowType kind) {
        fWindowKind = kind;

        titleBarPainter.state.set(WindowClipCorners.YES);
        if (fWindowKind == WindowType.UTILITY) {
            fIsUtility = true;
            metrics = AquaInternalFrameBorderMetrics.getMetrics(true);

            widgetPainter.state.set(WindowType.UTILITY);
            titleBarPainter.state.set(WindowType.UTILITY);
        } else {
            fIsUtility = false;
            metrics = AquaInternalFrameBorderMetrics.getMetrics(false);

            widgetPainter.state.set(WindowType.DOCUMENT);
            titleBarPainter.state.set(WindowType.DOCUMENT);
        }
        titleBarPainter.state.setValue(metrics.titleBarHeight);
        titleBarPainter.state.set(WindowTitleBarSeparator.YES);
        widgetPainter.state.set(AlignmentVertical.CENTER);

        fThisButtonSpan = (metrics.buttonWidth * 3) + (metrics.buttonPadding * 2);
        fThisLeftSideTotal = metrics.leftSidePadding + fThisButtonSpan + sAfterButtonPad;
    }

    public void setColors(final Color inSelectedTextColor, final Color inNotSelectedTextColor) {
        selectedTextColor = inSelectedTextColor;
        notSelectedTextColor = inNotSelectedTextColor;
    }

    // Utility to lazy-init and fill in fInBounds
    protected void setInBounds(final int x, final int y, final int w, final int h) {
        if (fInBounds == null) fInBounds = new Rectangle();

        fInBounds.x = x;
        fInBounds.y = y;
        fInBounds.width = w;
        fInBounds.height = h;
    }

    // Border interface
    public boolean isBorderOpaque() {
        return false;
    }

    // Border interface
    public void paintBorder(final Component c, final Graphics g, final int x, final int y, final int w, final int h) {
        // For expanded InternalFrames, the frame & component are the same object
        paintBorder((JInternalFrame)c, c, g, x, y, w, h);
    }

    protected void paintTitleContents(final Graphics g, final JInternalFrame frame, final int x, final int y, final int w, final int h) {
        final boolean isSelected = frame.isSelected();
        final Font f = g.getFont();

        g.setFont(metrics.font);

        // Center text vertically.
        final FontMetrics fm = g.getFontMetrics();
        final int baseline = (metrics.titleBarHeight + fm.getAscent() - fm.getLeading() - fm.getDescent()) / 2;

        // max button is the rightmost so use it
        final int usedWidth = fThisLeftSideTotal + sRightSideTitleClip;
        int iconWidth = getIconWidth(frame);
        if (iconWidth > 0) iconWidth += sAfterIconPad;

        final int totalWidth = w;

        // window title looks like: | 0 0 0(sAfterButtonPad)IconWidth Title(right pad) |
        final int availTextWidth = totalWidth - usedWidth - iconWidth - sAfterButtonPad;

        final String title = frame.getTitle();

        String text = title;
        int totalTextWidth = 0;

        int startXPosition = fThisLeftSideTotal;
        boolean wasTextShortened = false;
        // shorten the string to fit in the
        if (text != null && !text.isEmpty()) {
            totalTextWidth = SwingUtilities.computeStringWidth(fm, text);
            final String clipString = "\u2026";
            if (totalTextWidth > availTextWidth) {
                wasTextShortened = true;
                totalTextWidth = SwingUtilities.computeStringWidth(fm, clipString);
                int nChars;
                for (nChars = 0; nChars < text.length(); nChars++) {
                    final int nextCharWidth = fm.charWidth(text.charAt(nChars));
                    if ((totalTextWidth + nextCharWidth) > availTextWidth) {
                        break;
                    }
                    totalTextWidth += nextCharWidth;
                }
                text = text.substring(0, nChars) + clipString;
            }

            if (!wasTextShortened) {
                // center it!
                startXPosition = (totalWidth - (totalTextWidth + iconWidth)) / 2;
                if (startXPosition < fThisLeftSideTotal) {
                    startXPosition = fThisLeftSideTotal;
                }
            }

            if (isSelected || fIsUtility) {
                g.setColor(Color.lightGray);
            } else {
                g.setColor(Color.white);
            }
            SwingUtilities2.drawString(frame, g, text, x + startXPosition + iconWidth, y + baseline + 1);

            if (isSelected || fIsUtility) {
                g.setColor(selectedTextColor);
            } else {
                g.setColor(notSelectedTextColor);
            }

            SwingUtilities2.drawString(frame, g, text, x + startXPosition + iconWidth, y + baseline);
            g.setFont(f);
        }

        // sja fix x & y
        final int iconYPostion = (metrics.titleBarHeight - getIconHeight(frame)) / 2;
        paintTitleIcon(g, frame, x + startXPosition, y + iconYPostion);
    }

    public int getWhichButtonHit(final JInternalFrame frame, final int x, final int y) {
        int buttonHit = -1;

        final Insets i = frame.getInsets();
        int startX = i.left + metrics.leftSidePadding - 1;
        if (isInsideYButtonArea(i, y) && x >= startX) {
            if (x <= (startX + metrics.buttonWidth)) {
                if (frame.isClosable()) {
                    buttonHit = kCloseButton;
                }
            } else {
                startX += metrics.buttonWidth + metrics.buttonPadding;
                if (x >= startX && x <= (startX + metrics.buttonWidth)) {
                    if (frame.isIconifiable()) {
                        buttonHit = kIconButton;
                    }
                } else {
                    startX += metrics.buttonWidth + metrics.buttonPadding;
                    if (x >= startX && x <= (startX + metrics.buttonWidth)) {
                        if (frame.isMaximizable()) {
                            buttonHit = kGrowButton;
                        }
                    }
                }
            }
        }

        return buttonHit;
    }

    public void doButtonAction(final JInternalFrame frame, final int whichButton) {
        switch (whichButton) {
            case kCloseButton:
                frame.doDefaultCloseAction();
                break;

            case kIconButton:
                if (frame.isIconifiable()) {
                    if (!frame.isIcon()) {
                        try {
                            frame.setIcon(true);
                        } catch(final PropertyVetoException e1) {}
                    } else {
                        try {
                            frame.setIcon(false);
                        } catch(final PropertyVetoException e1) {}
                    }
                }
                break;

            case kGrowButton:
                if (frame.isMaximizable()) {
                    if (!frame.isMaximum()) {
                        try {
                            frame.setMaximum(true);
                        } catch(final PropertyVetoException e5) {}
                    } else {
                        try {
                            frame.setMaximum(false);
                        } catch(final PropertyVetoException e6) {}
                    }
                }
                break;

            default:
                System.err.println("AquaInternalFrameBorder should never get here!!!!");
                Thread.dumpStack();
                break;
        }
    }

    public boolean isInsideYButtonArea(final Insets i, final int y) {
        final int startY = (i.top - metrics.titleBarHeight / 2) - (metrics.buttonHeight / 2) - 1;
        final int endY = startY + metrics.buttonHeight;
        return y >= startY && y <= endY;
    }

    public boolean getWithinRolloverArea(final Insets i, final int x, final int y) {
        final int startX = i.left + metrics.leftSidePadding;
        final int endX = startX + fThisButtonSpan;
        return isInsideYButtonArea(i, y) && x >= startX && x <= endX;
    }

    protected void paintTitleIcon(final Graphics g, final JInternalFrame frame,
            final int x, final int y) {

        Icon icon = frame.getFrameIcon();
        if (icon == null) {
            icon = UIManager.getIcon("InternalFrame.icon");
        }

        if (icon == null) {
            return;
        }

        if (icon.getIconWidth() > sMaxIconWidth
                || icon.getIconHeight() > sMaxIconHeight) {
            final Graphics2D g2 = (Graphics2D) g;
            final AffineTransform savedAT = g2.getTransform();
            double xScaleFactor = (double) sMaxIconWidth / icon.getIconWidth();
            double yScaleFactor = (double) sMaxIconHeight / icon.getIconHeight();

            //Coordinates are after a translation hence relative origin shifts
            g2.translate(x, y);

            //scaling factor is needed to scale while maintaining aspect ratio
            double scaleMaintainAspectRatio = Math.min(xScaleFactor, yScaleFactor);

            //minimum value is taken to set to a maximum Icon Dimension
            g2.scale(scaleMaintainAspectRatio, scaleMaintainAspectRatio);

            icon.paintIcon(frame, g2, 0, 0);
            g2.setTransform(savedAT);

        } else {
            icon.paintIcon(frame, g, x, y);
        }
    }

    protected int getIconWidth(final JInternalFrame frame) {
        int width = 0;

        Icon icon = frame.getFrameIcon();
        if (icon == null) {
            icon = UIManager.getIcon("InternalFrame.icon");
        }
        if (icon != null) {
            width = Math.min(icon.getIconWidth(), sMaxIconWidth);
        }

        return width;
    }

    protected int getIconHeight(final JInternalFrame frame) {
        int height = 0;

        Icon icon = frame.getFrameIcon();
        if (icon == null) {
            icon = UIManager.getIcon("InternalFrame.icon");
        }
        if (icon != null) {
            height = Math.min(icon.getIconHeight(), sMaxIconHeight);
        }

        return height;
    }

    public void drawWindowTitle(final Graphics g, final JInternalFrame frame, final int inX, final int inY, final int inW, final int inH) {
        final int x = inX;
        final int y = inY;
        final int w = inW;
        int h = inH;

        h = metrics.titleBarHeight + inH;

        // paint the background
        titleBarPainter.state.set(frame.isSelected() ? State.ACTIVE : State.INACTIVE);
        titleBarPainter.paint(g, frame, x, y, w, h);

        // now the title and the icon
        paintTitleContents(g, frame, x, y, w, h);

        // finally the widgets
        drawAllWidgets(g, frame); // rollover is last attribute
    }

    // Component could be a JInternalFrame or a JDesktopIcon
    void paintBorder(final JInternalFrame frame, final Component c, final Graphics g, final int x, final int y, final int w, final int h) {
        if (fBorderInsets == null) getBorderInsets(c);
        // Set the contentRect - inset by border size
        setInBounds(x + fBorderInsets.left, y + fBorderInsets.top, w - (fBorderInsets.right + fBorderInsets.left), h - (fBorderInsets.top + fBorderInsets.bottom));

        // Set parameters
        setMetrics(frame, c);

        // Draw the frame
        drawWindowTitle(g, frame, x, y, w, h);
    }

    // defaults to false
    boolean isDirty(final JInternalFrame frame) {
        final Object dirty = frame.getClientProperty("windowModified");
        if (dirty == null || dirty == Boolean.FALSE) return false;
        return true;
    }

    // Border interface
    public Insets getBorderInsets(final Component c) {
        if (fBorderInsets == null) fBorderInsets = new Insets(0, 0, 0, 0);

        // Paranoia check
        if (!(c instanceof JInternalFrame)) return fBorderInsets;

        final JInternalFrame frame = (JInternalFrame)c;

        // Set the contentRect to an arbitrary value (in case the current real one is too small)
        setInBounds(0, 0, kContentTester, kContentTester);

        // Set parameters
        setMetrics(frame, c);

        fBorderInsets.left = 0;
        fBorderInsets.top = metrics.titleBarHeight;
        fBorderInsets.right = 0;
        fBorderInsets.bottom = 0;

        return fBorderInsets;
    }

    public void repaintButtonArea(final JInternalFrame frame) {
        final Insets i = frame.getInsets();
        final int x = i.left + metrics.leftSidePadding;
        final int y = i.top - metrics.titleBarHeight + 1;
        frame.repaint(x, y, fThisButtonSpan, metrics.titleBarHeight - 2);
    }

    // Draw all the widgets this frame supports
    void drawAllWidgets(final Graphics g, final JInternalFrame frame) {
        int x = metrics.leftSidePadding;
        int y = (metrics.titleBarHeight - metrics.buttonHeight) / 2 - metrics.titleBarHeight;

        final Insets insets = frame.getInsets();
        x += insets.left;
        y += insets.top + metrics.downShift;

        final AquaInternalFrameUI ui = (AquaInternalFrameUI)frame.getUI();
        final int buttonPressedIndex = ui.getWhichButtonPressed();
        final boolean overButton = ui.getMouseOverPressedButton();
        final boolean rollover = ui.getRollover();

        final boolean frameSelected = frame.isSelected() || fIsUtility;
        final boolean generalActive = rollover || frameSelected;

        final boolean dirty = isDirty(frame);

        paintButton(g, frame, x, y, kCloseButton, buttonPressedIndex, overButton, frame.isClosable(), generalActive, rollover, dirty);

        x += metrics.buttonPadding + metrics.buttonWidth;
        paintButton(g, frame, x, y, kIconButton, buttonPressedIndex, overButton, frame.isIconifiable(), generalActive, rollover, false);

        x += metrics.buttonPadding + metrics.buttonWidth;

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