processing4/app/src/processing/app/laf/SwingUtilities2.java at main · processing/processing4 · GitHub

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* 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();

}

processing4/app/src/processing/app/laf/SwingUtilities2.java at main · processing/processing4 · GitHub

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