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/*
* Copyright (c) 2002, 2021, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package processing.app.laf;
import javax.swing.JComponent;
import java.awt.Component;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.Toolkit;
import java.awt.font.FontRenderContext;
import java.awt.font.TextAttribute;
import java.awt.font.TextHitInfo;
import java.awt.font.TextLayout;
import java.awt.geom.Rectangle2D;
import java.util.HashMap;
import java.util.Map;
import static java.awt.RenderingHints.KEY_TEXT_ANTIALIASING;
import static java.awt.RenderingHints.KEY_TEXT_LCD_CONTRAST;
/**
* Hacked up from the source of sun.swing.SwingUtilities2.
*/
class SwingUtilities2 {
private static final int CHAR_BUFFER_SIZE = 100;
private static final Object charsBufferLock = new Object();
private static char[] charsBuffer = new char[CHAR_BUFFER_SIZE];
public static final FontRenderContext DEFAULT_FRC =
new FontRenderContext(null, false, false);
/**
* Fill the character buffer cache. Return the buffer length.
*/
private static int syncCharsBuffer(String s) {
int length = s.length();
if ((charsBuffer == null) || (charsBuffer.length < length)) {
charsBuffer = s.toCharArray();
} else {
s.getChars(0, length, charsBuffer, 0);
}
return length;
}
/**
* checks whether TextLayout is required to handle characters.
*
* @param text characters to be tested
* @param start start
* @param limit limit
* @return {@code true} if TextLayout is required
* {@code false} if TextLayout is not required
*/
public static final boolean isComplexLayout(char[] text, int start, int limit) {
//return FontUtilities.isComplexText(text, start, limit);
return false;
}
/**
* Returns the FontMetrics for the current Font of the passed
* in Graphics. This method is used when a Graphics
* is available, typically when painting. If a Graphics is not
* available the JComponent method of the same name should be used.
* <p>
* Callers should pass in a non-null JComponent, the exception
* to this is if a JComponent is not readily available at the time of
* painting.
* <p>
* This does not necessarily return the FontMetrics from the
* Graphics.
*
* @param c JComponent requesting FontMetrics, may be null
* @param g Graphics Graphics
*/
public static FontMetrics getFontMetrics(JComponent c, Graphics g) {
return getFontMetrics(c, g, g.getFont());
}
/**
* Returns the FontMetrics for the specified Font.
* This method is used when a Graphics is available, typically when
* painting. If a Graphics is not available the JComponent method of
* the same name should be used.
* <p>
* Callers should pass in a non-null JComonent, the exception
* to this is if a JComponent is not readily available at the time of
* painting.
* <p>
* This does not necessarily return the FontMetrics from the
* Graphics.
*
* @param c JComponent requesting FontMetrics, may be null
* @param c Graphics Graphics
* @param font Font to get FontMetrics for
*/
@SuppressWarnings("deprecation")
public static FontMetrics getFontMetrics(JComponent c, Graphics g,
Font font) {
if (c != null) {
// Note: We assume that we're using the FontMetrics
// from the widget to layout out text, otherwise we can get
// mismatches when printing.
return c.getFontMetrics(font);
}
return Toolkit.getDefaultToolkit().getFontMetrics(font);
}
/**
* Returns the width of the passed in String.
* If the passed String is {@code null}, returns zero.
*
* @param c JComponent that will display the string, may be null
* @param fm FontMetrics used to measure the String width
* @param string String to get the width of
*/
public static int stringWidth(JComponent c, FontMetrics fm, String string) {
return (int) stringWidth(c, fm, string, false);
}
/**
* Returns the width of the passed in String.
* If the passed String is {@code null}, returns zero.
*
* @param c JComponent that will display the string, may be null
* @param fm FontMetrics used to measure the String width
* @param string String to get the width of
* @param useFPAPI use floating point API
*/
public static float stringWidth(JComponent c, FontMetrics fm, String string,
boolean useFPAPI){
if (string == null || string.isEmpty()) {
return 0;
}
boolean needsTextLayout = ((c != null) &&
(c.getClientProperty(TextAttribute.NUMERIC_SHAPING) != null));
if (needsTextLayout) {
synchronized(charsBufferLock) {
int length = syncCharsBuffer(string);
needsTextLayout = isComplexLayout(charsBuffer, 0, length);
}
}
if (needsTextLayout) {
TextLayout layout = createTextLayout(c, string,
fm.getFont(), fm.getFontRenderContext());
return layout.getAdvance();
} else {
return getFontStringWidth(string, fm, useFPAPI);
}
}
public static float getFontStringWidth(String data, FontMetrics fm,
boolean useFPAPI)
{
if (useFPAPI) {
Rectangle2D bounds = fm.getFont()
.getStringBounds(data, fm.getFontRenderContext());
return (float) bounds.getWidth();
} else {
return fm.stringWidth(data);
}
}
private static TextLayout createTextLayout(JComponent c, String s,
Font f, FontRenderContext frc) {
Object shaper = (c == null ?
null : c.getClientProperty(TextAttribute.NUMERIC_SHAPING));
if (shaper == null) {
return new TextLayout(s, f, frc);
} else {
Map<TextAttribute, Object> a = new HashMap<TextAttribute, Object>();
a.put(TextAttribute.FONT, f);
a.put(TextAttribute.NUMERIC_SHAPING, shaper);
return new TextLayout(s, a, frc);
}
}
/**
* Draws the string at the specified location.
*
* @param c JComponent that will display the string, may be null
* @param g Graphics to draw the text to
* @param text String to display
* @param x X coordinate to draw the text at
* @param y Y coordinate to draw the text at
* @param useFPAPI use floating point API
*/
public static void drawString(JComponent c, Graphics g, String text,
float x, float y, boolean useFPAPI) {
// c may be null
// All non-editable widgets that draw strings call into this
// methods. By non-editable that means widgets like JLabel, JButton
// but NOT JTextComponents.
if ( text == null || text.length() <= 0 ) { //no need to paint empty strings
return;
}
/*
if (isPrinting(g)) {
Graphics2D g2d = getGraphics2D(g);
if (g2d != null) {
String trimmedText = trimTrailingSpaces(text);
if (!trimmedText.isEmpty()) {
float screenWidth = (float) g2d.getFont().getStringBounds
(trimmedText, getFontRenderContext(c)).getWidth();
TextLayout layout = createTextLayout(c, text, g2d.getFont(),
g2d.getFontRenderContext());
// If text fits the screenWidth, then do not need to justify
if (sun.swing.SwingUtilities2.stringWidth(c, g2d.getFontMetrics(),
trimmedText) > screenWidth) {
layout = layout.getJustifiedLayout(screenWidth);
}
// Use alternate print color if specified
Color col = g2d.getColor();
if (col instanceof PrintColorUIResource) {
g2d.setColor(((PrintColorUIResource)col).getPrintColor());
}
layout.draw(g2d, x, y);
g2d.setColor(col);
}
return;
}
}
*/
// If we get here we're not printing
if (g instanceof Graphics2D) {
Graphics2D g2 = (Graphics2D)g;
boolean needsTextLayout = ((c != null) &&
(c.getClientProperty(TextAttribute.NUMERIC_SHAPING) != null));
if (needsTextLayout) {
synchronized(charsBufferLock) {
int length = syncCharsBuffer(text);
needsTextLayout = isComplexLayout(charsBuffer, 0, length);
}
}
Object aaHint = (c == null)
? null
: c.getClientProperty(KEY_TEXT_ANTIALIASING);
if (aaHint != null) {
Object oldContrast = null;
Object oldAAValue = g2.getRenderingHint(KEY_TEXT_ANTIALIASING);
if (aaHint != oldAAValue) {
g2.setRenderingHint(KEY_TEXT_ANTIALIASING, aaHint);
} else {
oldAAValue = null;
}
Object lcdContrastHint = c.getClientProperty(
KEY_TEXT_LCD_CONTRAST);
if (lcdContrastHint != null) {
oldContrast = g2.getRenderingHint(KEY_TEXT_LCD_CONTRAST);
if (lcdContrastHint.equals(oldContrast)) {
oldContrast = null;
} else {
g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST,
lcdContrastHint);
}
}
if (needsTextLayout) {
TextLayout layout = createTextLayout(c, text, g2.getFont(),
g2.getFontRenderContext());
layout.draw(g2, x, y);
} else {
g2.drawString(text, x, y);
}
if (oldAAValue != null) {
g2.setRenderingHint(KEY_TEXT_ANTIALIASING, oldAAValue);
}
if (oldContrast != null) {
g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, oldContrast);
}
return;
}
if (needsTextLayout){
TextLayout layout = createTextLayout(c, text, g2.getFont(),
g2.getFontRenderContext());
layout.draw(g2, x, y);
return;
}
}
g.drawString(text, (int) x, (int) y);
}
/**
* Draws the string at the specified location underlining the specified
* character.
*
* @param c JComponent that will display the string, may be null
* @param g Graphics to draw the text to
* @param text String to display
* @param underlinedIndex Index of a character in the string to underline
* @param x X coordinate to draw the text at
* @param y Y coordinate to draw the text at
*/
public static void drawStringUnderlineCharAt(JComponent c,Graphics g,
String text, int underlinedIndex, int x, int y) {
drawStringUnderlineCharAt(c, g, text, underlinedIndex, x, y, false);
}
/**
* Draws the string at the specified location underlining the specified
* character.
*
* @param c JComponent that will display the string, may be null
* @param g Graphics to draw the text to
* @param text String to display
* @param underlinedIndex Index of a character in the string to underline
* @param x X coordinate to draw the text at
* @param y Y coordinate to draw the text at
* @param useFPAPI use floating point API
*/
public static void drawStringUnderlineCharAt(JComponent c, Graphics g,
String text, int underlinedIndex,
float x, float y,
boolean useFPAPI) {
if (text == null || text.length() <= 0) {
return;
}
drawString(c, g, text, x, y, useFPAPI);
int textLength = text.length();
if (underlinedIndex >= 0 && underlinedIndex < textLength ) {
float underlineRectY = y;
int underlineRectHeight = 1;
float underlineRectX = 0;
int underlineRectWidth = 0;
// boolean isPrinting = isPrinting(g);
// boolean needsTextLayout = isPrinting;
boolean needsTextLayout = false;
if (!needsTextLayout) {
synchronized (charsBufferLock) {
syncCharsBuffer(text);
needsTextLayout =
isComplexLayout(charsBuffer, 0, textLength);
}
}
if (!needsTextLayout) {
FontMetrics fm = g.getFontMetrics();
underlineRectX = x +
stringWidth(c,fm,
text.substring(0,underlinedIndex));
underlineRectWidth = fm.charWidth(text.
charAt(underlinedIndex));
} else {
Graphics2D g2d = getGraphics2D(g);
if (g2d != null) {
TextLayout layout =
createTextLayout(c, text, g2d.getFont(),
g2d.getFontRenderContext());
// if (isPrinting) {
// float screenWidth = (float)g2d.getFont().
// getStringBounds(text, getFontRenderContext(c)).getWidth();
// // If text fits the screenWidth, then do not need to justify
// if (stringWidth(c, g2d.getFontMetrics(),
// text) > screenWidth) {
// layout = layout.getJustifiedLayout(screenWidth);
// }
// }
TextHitInfo leading =
TextHitInfo.leading(underlinedIndex);
TextHitInfo trailing =
TextHitInfo.trailing(underlinedIndex);
Shape shape =
layout.getVisualHighlightShape(leading, trailing);
Rectangle rect = shape.getBounds();
underlineRectX = x + rect.x;
underlineRectWidth = rect.width;
}
}
g.fillRect((int) underlineRectX, (int) underlineRectY + 1,
underlineRectWidth, underlineRectHeight);
}
}
/*
* Tries it best to get Graphics2D out of the given Graphics
* returns null if can not derive it.
*/
public static Graphics2D getGraphics2D(Graphics g) {
if (g instanceof Graphics2D) {
return (Graphics2D) g;
// } else if (g instanceof ProxyPrintGraphics) {
// return (Graphics2D)(((ProxyPrintGraphics)g).getGraphics());
} else {
return null;
}
}
/*
* Returns FontRenderContext associated with Component.
* FontRenderContext from Component.getFontMetrics is associated
* with the component.
*
* Uses Component.getFontMetrics to get the FontRenderContext from.
* see JComponent.getFontMetrics and TextLayoutStrategy.java
*/
public static FontRenderContext getFontRenderContext(Component c) {
assert c != null;
if (c == null) {
return DEFAULT_FRC;
} else {
return c.getFontMetrics(c.getFont()).getFontRenderContext();
}
}
}