JDK8/Java8源码在线阅读
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* accompanied this code).
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package java.awt;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.font.LineMetrics;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.peer.FontPeer;
import java.io.*;
import java.lang.ref.SoftReference;
import java.nio.file.Files;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.text.AttributedCharacterIterator.Attribute;
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
import java.util.Hashtable;
import java.util.Locale;
import java.util.Map;
import sun.font.StandardGlyphVector;
import sun.font.AttributeMap;
import sun.font.AttributeValues;
import sun.font.CompositeFont;
import sun.font.CreatedFontTracker;
import sun.font.Font2D;
import sun.font.Font2DHandle;
import sun.font.FontAccess;
import sun.font.FontManager;
import sun.font.FontManagerFactory;
import sun.font.FontUtilities;
import sun.font.GlyphLayout;
import sun.font.FontLineMetrics;
import sun.font.CoreMetrics;
import static sun.font.EAttribute.*;
/**
* The <code>Font</code> class represents fonts, which are used to
* render text in a visible way.
* A font provides the information needed to map sequences of
* <em>characters</em> to sequences of <em>glyphs</em>
* and to render sequences of glyphs on <code>Graphics</code> and
* <code>Component</code> objects.
*
* <h3>Characters and Glyphs</h3>
*
* A <em>character</em> is a symbol that represents an item such as a letter,
* a digit, or punctuation in an abstract way. For example, <code>'g'</code>,
* LATIN SMALL LETTER G, is a character.
* <p>
* A <em>glyph</em> is a shape used to render a character or a sequence of
* characters. In simple writing systems, such as Latin, typically one glyph
* represents one character. In general, however, characters and glyphs do not
* have one-to-one correspondence. For example, the character 'á'
* LATIN SMALL LETTER A WITH ACUTE, can be represented by
* two glyphs: one for 'a' and one for '´'. On the other hand, the
* two-character string "fi" can be represented by a single glyph, an
* "fi" ligature. In complex writing systems, such as Arabic or the South
* and South-East Asian writing systems, the relationship between characters
* and glyphs can be more complicated and involve context-dependent selection
* of glyphs as well as glyph reordering.
*
* A font encapsulates the collection of glyphs needed to render a selected set
* of characters as well as the tables needed to map sequences of characters to
* corresponding sequences of glyphs.
*
* <h3>Physical and Logical Fonts</h3>
*
* The Java Platform distinguishes between two kinds of fonts:
* <em>physical</em> fonts and <em>logical</em> fonts.
* <p>
* <em>Physical</em> fonts are the actual font libraries containing glyph data
* and tables to map from character sequences to glyph sequences, using a font
* technology such as TrueType or PostScript Type 1.
* All implementations of the Java Platform must support TrueType fonts;
* support for other font technologies is implementation dependent.
* Physical fonts may use names such as Helvetica, Palatino, HonMincho, or
* any number of other font names.
* Typically, each physical font supports only a limited set of writing
* systems, for example, only Latin characters or only Japanese and Basic
* Latin.
* The set of available physical fonts varies between configurations.
* Applications that require specific fonts can bundle them and instantiate
* them using the {@link #createFont createFont} method.
* <p>
* <em>Logical</em> fonts are the five font families defined by the Java
* platform which must be supported by any Java runtime environment:
* Serif, SansSerif, Monospaced, Dialog, and DialogInput.
* These logical fonts are not actual font libraries. Instead, the logical
* font names are mapped to physical fonts by the Java runtime environment.
* The mapping is implementation and usually locale dependent, so the look
* and the metrics provided by them vary.
* Typically, each logical font name maps to several physical fonts in order to
* cover a large range of characters.
* <p>
* Peered AWT components, such as {@link Label Label} and
* {@link TextField TextField}, can only use logical fonts.
* <p>
* For a discussion of the relative advantages and disadvantages of using
* physical or logical fonts, see the
* <a href="http://www.oracle.com/technetwork/java/javase/tech/faq-jsp-138165.html">Internationalization FAQ</a>
* document.
*
* <h3>Font Faces and Names</h3>
*
* A <code>Font</code>
* can have many faces, such as heavy, medium, oblique, gothic and
* regular. All of these faces have similar typographic design.
* <p>
* There are three different names that you can get from a
* <code>Font</code> object. The <em>logical font name</em> is simply the
* name that was used to construct the font.
* The <em>font face name</em>, or just <em>font name</em> for
* short, is the name of a particular font face, like Helvetica Bold. The
* <em>family name</em> is the name of the font family that determines the
* typographic design across several faces, like Helvetica.
* <p>
* The <code>Font</code> class represents an instance of a font face from
* a collection of font faces that are present in the system resources
* of the host system. As examples, Arial Bold and Courier Bold Italic
* are font faces. There can be several <code>Font</code> objects
* associated with a font face, each differing in size, style, transform
* and font features.
* <p>
* The {@link GraphicsEnvironment#getAllFonts() getAllFonts} method
* of the <code>GraphicsEnvironment</code> class returns an
* array of all font faces available in the system. These font faces are
* returned as <code>Font</code> objects with a size of 1, identity
* transform and default font features. These
* base fonts can then be used to derive new <code>Font</code> objects
* with varying sizes, styles, transforms and font features via the
* <code>deriveFont</code> methods in this class.
*
* <h3>Font and TextAttribute</h3>
*
* <p><code>Font</code> supports most
* <code>TextAttribute</code>s. This makes some operations, such as
* rendering underlined text, convenient since it is not
* necessary to explicitly construct a <code>TextLayout</code> object.
* Attributes can be set on a Font by constructing or deriving it
* using a <code>Map</code> of <code>TextAttribute</code> values.
*
* <p>The values of some <code>TextAttributes</code> are not
* serializable, and therefore attempting to serialize an instance of
* <code>Font</code> that has such values will not serialize them.
* This means a Font deserialized from such a stream will not compare
* equal to the original Font that contained the non-serializable
* attributes. This should very rarely pose a problem
* since these attributes are typically used only in special
* circumstances and are unlikely to be serialized.
*
* <ul>
* <li><code>FOREGROUND</code> and <code>BACKGROUND</code> use
* <code>Paint</code> values. The subclass <code>Color</code> is
* serializable, while <code>GradientPaint</code> and
* <code>TexturePaint</code> are not.</li>
* <li><code>CHAR_REPLACEMENT</code> uses
* <code>GraphicAttribute</code> values. The subclasses
* <code>ShapeGraphicAttribute</code> and
* <code>ImageGraphicAttribute</code> are not serializable.</li>
* <li><code>INPUT_METHOD_HIGHLIGHT</code> uses
* <code>InputMethodHighlight</code> values, which are
* not serializable. See {@link java.awt.im.InputMethodHighlight}.</li>
* </ul>
*
* <p>Clients who create custom subclasses of <code>Paint</code> and
* <code>GraphicAttribute</code> can make them serializable and
* avoid this problem. Clients who use input method highlights can
* convert these to the platform-specific attributes for that
* highlight on the current platform and set them on the Font as
* a workaround.
*
* <p>The <code>Map</code>-based constructor and
* <code>deriveFont</code> APIs ignore the FONT attribute, and it is
* not retained by the Font; the static {@link #getFont} method should
* be used if the FONT attribute might be present. See {@link
* java.awt.font.TextAttribute#FONT} for more information.</p>
*
* <p>Several attributes will cause additional rendering overhead
* and potentially invoke layout. If a <code>Font</code> has such
* attributes, the <code>{@link #hasLayoutAttributes()}</code> method
* will return true.</p>
*
* <p>Note: Font rotations can cause text baselines to be rotated. In
* order to account for this (rare) possibility, font APIs are
* specified to return metrics and take parameters 'in
* baseline-relative coordinates'. This maps the 'x' coordinate to
* the advance along the baseline, (positive x is forward along the
* baseline), and the 'y' coordinate to a distance along the
* perpendicular to the baseline at 'x' (positive y is 90 degrees
* clockwise from the baseline vector). APIs for which this is
* especially important are called out as having 'baseline-relative
* coordinates.'
*/
public class Font implements java.io.Serializable
{
private static class FontAccessImpl extends FontAccess {
public Font2D getFont2D(Font font) {
return font.getFont2D();
}
public void setFont2D(Font font, Font2DHandle handle) {
font.font2DHandle = handle;
}
public void setCreatedFont(Font font) {
font.createdFont = true;
}
public boolean isCreatedFont(Font font) {
return font.createdFont;
}
}
static {
/* ensure that the necessary native libraries are loaded */
Toolkit.loadLibraries();
initIDs();
FontAccess.setFontAccess(new FontAccessImpl());
}
/**
* This is now only used during serialization. Typically
* it is null.
*
* @serial
* @see #getAttributes()
*/
private Hashtable<Object, Object> fRequestedAttributes;
/*
* Constants to be used for logical font family names.
*/
/**
* A String constant for the canonical family name of the
* logical font "Dialog". It is useful in Font construction
* to provide compile-time verification of the name.
* @since 1.6
*/
public static final String DIALOG = "Dialog";
/**
* A String constant for the canonical family name of the
* logical font "DialogInput". It is useful in Font construction
* to provide compile-time verification of the name.
* @since 1.6
*/
public static final String DIALOG_INPUT = "DialogInput";
/**
* A String constant for the canonical family name of the
* logical font "SansSerif". It is useful in Font construction
* to provide compile-time verification of the name.
* @since 1.6
*/
public static final String SANS_SERIF = "SansSerif";
/**
* A String constant for the canonical family name of the
* logical font "Serif". It is useful in Font construction
* to provide compile-time verification of the name.
* @since 1.6
*/
public static final String SERIF = "Serif";
/**
* A String constant for the canonical family name of the
* logical font "Monospaced". It is useful in Font construction
* to provide compile-time verification of the name.
* @since 1.6
*/
public static final String MONOSPACED = "Monospaced";
/*
* Constants to be used for styles. Can be combined to mix
* styles.
*/
/**
* The plain style constant.
*/
public static final int PLAIN = 0;
/**
* The bold style constant. This can be combined with the other style
* constants (except PLAIN) for mixed styles.
*/
public static final int BOLD = 1;
/**
* The italicized style constant. This can be combined with the other
* style constants (except PLAIN) for mixed styles.
*/
public static final int ITALIC = 2;
/**
* The baseline used in most Roman scripts when laying out text.
*/
public static final int ROMAN_BASELINE = 0;
/**
* The baseline used in ideographic scripts like Chinese, Japanese,
* and Korean when laying out text.
*/
public static final int CENTER_BASELINE = 1;
/**
* The baseline used in Devanigiri and similar scripts when laying
* out text.
*/
public static final int HANGING_BASELINE = 2;
/**
* Identify a font resource of type TRUETYPE.
* Used to specify a TrueType font resource to the
* {@link #createFont} method.
* The TrueType format was extended to become the OpenType
* format, which adds support for fonts with Postscript outlines,
* this tag therefore references these fonts, as well as those
* with TrueType outlines.
* @since 1.3
*/
public static final int TRUETYPE_FONT = 0;
/**
* Identify a font resource of type TYPE1.
* Used to specify a Type1 font resource to the
* {@link #createFont} method.
* @since 1.5
*/
public static final int TYPE1_FONT = 1;
/**
* The logical name of this <code>Font</code>, as passed to the
* constructor.
* @since JDK1.0
*
* @serial
* @see #getName
*/
protected String name;
/**
* The style of this <code>Font</code>, as passed to the constructor.
* This style can be PLAIN, BOLD, ITALIC, or BOLD+ITALIC.
* @since JDK1.0
*
* @serial
* @see #getStyle()
*/
protected int style;
/**
* The point size of this <code>Font</code>, rounded to integer.
* @since JDK1.0
*
* @serial
* @see #getSize()
*/
protected int size;
/**
* The point size of this <code>Font</code> in <code>float</code>.
*
* @serial
* @see #getSize()
* @see #getSize2D()
*/
protected float pointSize;
/**
* The platform specific font information.
*/
private transient FontPeer peer;
private transient long pData; // native JDK1.1 font pointer
private transient Font2DHandle font2DHandle;
private transient AttributeValues values;
private transient boolean hasLayoutAttributes;
/*
* If the origin of a Font is a created font then this attribute
* must be set on all derived fonts too.
*/
private transient boolean createdFont = false;
/*
* This is true if the font transform is not identity. It
* is used to avoid unnecessary instantiation of an AffineTransform.
*/
private transient boolean nonIdentityTx;
/*
* A cached value used when a transform is required for internal
* use. This must not be exposed to callers since AffineTransform
* is mutable.
*/
private static final AffineTransform identityTx = new AffineTransform();
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = -4206021311591459213L;
/**
* Gets the peer of this <code>Font</code>.
* @return the peer of the <code>Font</code>.
* @since JDK1.1
* @deprecated Font rendering is now platform independent.
*/
@Deprecated
public FontPeer getPeer(){
return getPeer_NoClientCode();
}
// NOTE: This method is called by privileged threads.
// We implement this functionality in a package-private method
// to insure that it cannot be overridden by client subclasses.
// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
@SuppressWarnings("deprecation")
final FontPeer getPeer_NoClientCode() {
if(peer == null) {
Toolkit tk = Toolkit.getDefaultToolkit();
this.peer = tk.getFontPeer(name, style);
}
return peer;
}
/**
* Return the AttributeValues object associated with this
* font. Most of the time, the internal object is null.
* If required, it will be created from the 'standard'
* state on the font. Only non-default values will be
* set in the AttributeValues object.
*
* <p>Since the AttributeValues object is mutable, and it
* is cached in the font, care must be taken to ensure that
* it is not mutated.
*/
private AttributeValues getAttributeValues() {
if (values == null) {
AttributeValues valuesTmp = new AttributeValues();
valuesTmp.setFamily(name);
valuesTmp.setSize(pointSize); // expects the float value.
if ((style & BOLD) != 0) {
valuesTmp.setWeight(2); // WEIGHT_BOLD
}
if ((style & ITALIC) != 0) {
valuesTmp.setPosture(.2f); // POSTURE_OBLIQUE
}
valuesTmp.defineAll(PRIMARY_MASK); // for streaming compatibility
values = valuesTmp;
}
return values;
}
private Font2D getFont2D() {
FontManager fm = FontManagerFactory.getInstance();
if (fm.usingPerAppContextComposites() &&
font2DHandle != null &&
font2DHandle.font2D instanceof CompositeFont &&
((CompositeFont)(font2DHandle.font2D)).isStdComposite()) {
return fm.findFont2D(name, style,
FontManager.LOGICAL_FALLBACK);
} else if (font2DHandle == null) {
font2DHandle =
fm.findFont2D(name, style,
FontManager.LOGICAL_FALLBACK).handle;
}
/* Do not cache the de-referenced font2D. It must be explicitly
* de-referenced to pick up a valid font in the event that the
* original one is marked invalid
*/
return font2DHandle.font2D;
}
/**
* Creates a new <code>Font</code> from the specified name, style and
* point size.
* <p>
* The font name can be a font face name or a font family name.
* It is used together with the style to find an appropriate font face.
* When a font family name is specified, the style argument is used to
* select the most appropriate face from the family. When a font face
* name is specified, the face's style and the style argument are
* merged to locate the best matching font from the same family.
* For example if face name "Arial Bold" is specified with style
* <code>Font.ITALIC</code>, the font system looks for a face in the
* "Arial" family that is bold and italic, and may associate the font
* instance with the physical font face "Arial Bold Italic".
* The style argument is merged with the specified face's style, not
* added or subtracted.
* This means, specifying a bold face and a bold style does not
* double-embolden the font, and specifying a bold face and a plain
* style does not lighten the font.
* <p>
* If no face for the requested style can be found, the font system
* may apply algorithmic styling to achieve the desired style.
* For example, if <code>ITALIC</code> is requested, but no italic
* face is available, glyphs from the plain face may be algorithmically
* obliqued (slanted).
* <p>
* Font name lookup is case insensitive, using the case folding
* rules of the US locale.
* <p>
* If the <code>name</code> parameter represents something other than a
* logical font, i.e. is interpreted as a physical font face or family, and
* this cannot be mapped by the implementation to a physical font or a
* compatible alternative, then the font system will map the Font
* instance to "Dialog", such that for example, the family as reported
* by {@link #getFamily() getFamily} will be "Dialog".
* <p>
*
* @param name the font name. This can be a font face name or a font
* family name, and may represent either a logical font or a physical
* font found in this {@code GraphicsEnvironment}.
* The family names for logical fonts are: Dialog, DialogInput,
* Monospaced, Serif, or SansSerif. Pre-defined String constants exist
* for all of these names, for example, {@code DIALOG}. If {@code name} is
* {@code null}, the <em>logical font name</em> of the new
* {@code Font} as returned by {@code getName()} is set to
* the name "Default".
* @param style the style constant for the {@code Font}
* The style argument is an integer bitmask that may
* be {@code PLAIN}, or a bitwise union of {@code BOLD} and/or
* {@code ITALIC} (for example, {@code ITALIC} or {@code BOLD|ITALIC}).
* If the style argument does not conform to one of the expected
* integer bitmasks then the style is set to {@code PLAIN}.
* @param size the point size of the {@code Font}
* @see GraphicsEnvironment#getAllFonts
* @see GraphicsEnvironment#getAvailableFontFamilyNames
* @since JDK1.0
*/
public Font(String name, int style, int size) {
this.name = (name != null) ? name : "Default";
this.style = (style & ~0x03) == 0 ? style : 0;
this.size = size;
this.pointSize = size;
}
private Font(String name, int style, float sizePts) {
this.name = (name != null) ? name : "Default";
this.style = (style & ~0x03) == 0 ? style : 0;
this.size = (int)(sizePts + 0.5);
this.pointSize = sizePts;
}
/* This constructor is used by deriveFont when attributes is null */
private Font(String name, int style, float sizePts,
boolean created, Font2DHandle handle) {
this(name, style, sizePts);
this.createdFont = created;
/* Fonts created from a stream will use the same font2D instance
* as the parent.
* One exception is that if the derived font is requested to be
* in a different style, then also check if its a CompositeFont
* and if so build a new CompositeFont from components of that style.
* CompositeFonts can only be marked as "created" if they are used
* to add fall backs to a physical font. And non-composites are
* always from "Font.createFont()" and shouldn't get this treatment.
*/
if (created) {
if (handle.font2D instanceof CompositeFont &&
handle.font2D.getStyle() != style) {
FontManager fm = FontManagerFactory.getInstance();
this.font2DHandle = fm.getNewComposite(null, style, handle);
} else {
this.font2DHandle = handle;
}
}
}
/* used to implement Font.createFont */
private Font(File fontFile, int fontFormat,
boolean isCopy, CreatedFontTracker tracker)
throws FontFormatException {
this.createdFont = true;
/* Font2D instances created by this method track their font file
* so that when the Font2D is GC'd it can also remove the file.
*/
FontManager fm = FontManagerFactory.getInstance();
this.font2DHandle = fm.createFont2D(fontFile, fontFormat, isCopy,
tracker).handle;
this.name = this.font2DHandle.font2D.getFontName(Locale.getDefault());
this.style = Font.PLAIN;
this.size = 1;
this.pointSize = 1f;
}
/* This constructor is used when one font is derived from another.
* Fonts created from a stream will use the same font2D instance as the
* parent. They can be distinguished because the "created" argument
* will be "true". Since there is no way to recreate these fonts they
* need to have the handle to the underlying font2D passed in.
* "created" is also true when a special composite is referenced by the
* handle for essentially the same reasons.
* But when deriving a font in these cases two particular attributes
* need special attention: family/face and style.
* The "composites" in these cases need to be recreated with optimal
* fonts for the new values of family and style.
* For fonts created with createFont() these are treated differently.
* JDK can often synthesise a different style (bold from plain
* for example). For fonts created with "createFont" this is a reasonable
* solution but its also possible (although rare) to derive a font with a
* different family attribute. In this case JDK needs
* to break the tie with the original Font2D and find a new Font.
* The oldName and oldStyle are supplied so they can be compared with
* what the Font2D and the values. To speed things along :
* oldName == null will be interpreted as the name is unchanged.
* oldStyle = -1 will be interpreted as the style is unchanged.
* In these cases there is no need to interrogate "values".
*/
private Font(AttributeValues values, String oldName, int oldStyle,
boolean created, Font2DHandle handle) {
this.createdFont = created;
if (created) {
this.font2DHandle = handle;
String newName = null;
if (oldName != null) {
newName = values.getFamily();
if (oldName.equals(newName)) newName = null;
}
int newStyle = 0;
if (oldStyle == -1) {
newStyle = -1;
} else {
if (values.getWeight() >= 2f) newStyle = BOLD;
if (values.getPosture() >= .2f) newStyle |= ITALIC;
if (oldStyle == newStyle) newStyle = -1;
}
if (handle.font2D instanceof CompositeFont) {
if (newStyle != -1 || newName != null) {
FontManager fm = FontManagerFactory.getInstance();
this.font2DHandle =
fm.getNewComposite(newName, newStyle, handle);
}
} else if (newName != null) {
this.createdFont = false;
this.font2DHandle = null;
}
}
initFromValues(values);
}
/**
* Creates a new <code>Font</code> with the specified attributes.
* Only keys defined in {@link java.awt.font.TextAttribute TextAttribute}
* are recognized. In addition the FONT attribute is
* not recognized by this constructor
* (see {@link #getAvailableAttributes}). Only attributes that have
* values of valid types will affect the new <code>Font</code>.
* <p>
* If <code>attributes</code> is <code>null</code>, a new
* <code>Font</code> is initialized with default values.
* @see java.awt.font.TextAttribute
* @param attributes the attributes to assign to the new
* <code>Font</code>, or <code>null</code>
*/
public Font(Map<? extends Attribute, ?> attributes) {
initFromValues(AttributeValues.fromMap(attributes, RECOGNIZED_MASK));
}
/**
* Creates a new <code>Font</code> from the specified <code>font</code>.
* This constructor is intended for use by subclasses.
* @param font from which to create this <code>Font</code>.
* @throws NullPointerException if <code>font</code> is null
* @since 1.6
*/
protected Font(Font font) {
if (font.values != null) {
initFromValues(font.getAttributeValues().clone());
} else {
this.name = font.name;
this.style = font.style;
this.size = font.size;
this.pointSize = font.pointSize;
}
this.font2DHandle = font.font2DHandle;
this.createdFont = font.createdFont;
}
/**
* Font recognizes all attributes except FONT.
*/
private static final int RECOGNIZED_MASK = AttributeValues.MASK_ALL
& ~AttributeValues.getMask(EFONT);
/**
* These attributes are considered primary by the FONT attribute.
*/
private static final int PRIMARY_MASK =
AttributeValues.getMask(EFAMILY, EWEIGHT, EWIDTH, EPOSTURE, ESIZE,
ETRANSFORM, ESUPERSCRIPT, ETRACKING);
/**
* These attributes are considered secondary by the FONT attribute.
*/
private static final int SECONDARY_MASK =
RECOGNIZED_MASK & ~PRIMARY_MASK;
/**
* These attributes are handled by layout.
*/
private static final int LAYOUT_MASK =
AttributeValues.getMask(ECHAR_REPLACEMENT, EFOREGROUND, EBACKGROUND,
EUNDERLINE, ESTRIKETHROUGH, ERUN_DIRECTION,
EBIDI_EMBEDDING, EJUSTIFICATION,
EINPUT_METHOD_HIGHLIGHT, EINPUT_METHOD_UNDERLINE,
ESWAP_COLORS, ENUMERIC_SHAPING, EKERNING,
ELIGATURES, ETRACKING, ESUPERSCRIPT);
private static final int EXTRA_MASK =
AttributeValues.getMask(ETRANSFORM, ESUPERSCRIPT, EWIDTH);
/**
* Initialize the standard Font fields from the values object.
*/
private void initFromValues(AttributeValues values) {
this.values = values;
values.defineAll(PRIMARY_MASK); // for 1.5 streaming compatibility
this.name = values.getFamily();
this.pointSize = values.getSize();
this.size = (int)(values.getSize() + 0.5);
if (values.getWeight() >= 2f) this.style |= BOLD; // not == 2f
if (values.getPosture() >= .2f) this.style |= ITALIC; // not == .2f
this.nonIdentityTx = values.anyNonDefault(EXTRA_MASK);
this.hasLayoutAttributes = values.anyNonDefault(LAYOUT_MASK);
}
/**
* Returns a <code>Font</code> appropriate to the attributes.
* If <code>attributes</code>contains a <code>FONT</code> attribute
* with a valid <code>Font</code> as its value, it will be
* merged with any remaining attributes. See
* {@link java.awt.font.TextAttribute#FONT} for more
* information.
*
* @param attributes the attributes to assign to the new
* <code>Font</code>
* @return a new <code>Font</code> created with the specified
* attributes
* @throws NullPointerException if <code>attributes</code> is null.
* @since 1.2
* @see java.awt.font.TextAttribute
*/
public static Font getFont(Map<? extends Attribute, ?> attributes) {
// optimize for two cases:
// 1) FONT attribute, and nothing else
// 2) attributes, but no FONT
// avoid turning the attributemap into a regular map for no reason
if (attributes instanceof AttributeMap &&
((AttributeMap)attributes).getValues() != null) {
AttributeValues values = ((AttributeMap)attributes).getValues();
if (values.isNonDefault(EFONT)) {
Font font = values.getFont();
if (!values.anyDefined(SECONDARY_MASK)) {
return font;
}
// merge
values = font.getAttributeValues().clone();
values.merge(attributes, SECONDARY_MASK);
return new Font(values, font.name, font.style,
font.createdFont, font.font2DHandle);
}
return new Font(attributes);
}
Font font = (Font)attributes.get(TextAttribute.FONT);
if (font != null) {
if (attributes.size() > 1) { // oh well, check for anything else
AttributeValues values = font.getAttributeValues().clone();
values.merge(attributes, SECONDARY_MASK);
return new Font(values, font.name, font.style,
font.createdFont, font.font2DHandle);
}
return font;
}
return new Font(attributes);
}
/**
* Used with the byte count tracker for fonts created from streams.
* If a thread can create temp files anyway, no point in counting
* font bytes.
*/
private static boolean hasTempPermission() {
if (System.getSecurityManager() == null) {
return true;
}
File f = null;
boolean hasPerm = false;
try {
f = Files.createTempFile("+~JT", ".tmp").toFile();
f.delete();
f = null;
hasPerm = true;
} catch (Throwable t) {
/* inc. any kind of SecurityException */
}
return hasPerm;
}
/**
* Returns a new <code>Font</code> using the specified font type
* and input data. The new <code>Font</code> is
* created with a point size of 1 and style {@link #PLAIN PLAIN}.
* This base font can then be used with the <code>deriveFont</code>
* methods in this class to derive new <code>Font</code> objects with
* varying sizes, styles, transforms and font features. This
* method does not close the {@link InputStream}.
* <p>
* To make the <code>Font</code> available to Font constructors the
* returned <code>Font</code> must be registered in the
* <code>GraphicsEnviroment</code> by calling
* {@link GraphicsEnvironment#registerFont(Font) registerFont(Font)}.
* @param fontFormat the type of the <code>Font</code>, which is
* {@link #TRUETYPE_FONT TRUETYPE_FONT} if a TrueType resource is specified.
* or {@link #TYPE1_FONT TYPE1_FONT} if a Type 1 resource is specified.
* @param fontStream an <code>InputStream</code> object representing the
* input data for the font.
* @return a new <code>Font</code> created with the specified font type.
* @throws IllegalArgumentException if <code>fontFormat</code> is not
* <code>TRUETYPE_FONT</code>or<code>TYPE1_FONT</code>.
* @throws FontFormatException if the <code>fontStream</code> data does
* not contain the required font tables for the specified format.
* @throws IOException if the <code>fontStream</code>
* cannot be completely read.
* @see GraphicsEnvironment#registerFont(Font)
* @since 1.3
*/
public static Font createFont(int fontFormat, InputStream fontStream)
throws java.awt.FontFormatException, java.io.IOException {
if (hasTempPermission()) {
return createFont0(fontFormat, fontStream, null);
}
// Otherwise, be extra conscious of pending temp file creation and
// resourcefully handle the temp file resources, among other things.
CreatedFontTracker tracker = CreatedFontTracker.getTracker();
boolean acquired = false;
try {
acquired = tracker.acquirePermit();
if (!acquired) {
throw new IOException("Timed out waiting for resources.");
}
return createFont0(fontFormat, fontStream, tracker);
} catch (InterruptedException e) {
throw new IOException("Problem reading font data.");
} finally {
if (acquired) {
tracker.releasePermit();
}
}
}
private static Font createFont0(int fontFormat, InputStream fontStream,
CreatedFontTracker tracker)
throws java.awt.FontFormatException, java.io.IOException {
if (fontFormat != Font.TRUETYPE_FONT &&
fontFormat != Font.TYPE1_FONT) {
throw new IllegalArgumentException ("font format not recognized");
}
boolean copiedFontData = false;
try {
final File tFile = AccessController.doPrivileged(
new PrivilegedExceptionAction<File>() {
public File run() throws IOException {
return Files.createTempFile("+~JF", ".tmp").toFile();
}
}
);
if (tracker != null) {
tracker.add(tFile);
}
int totalSize = 0;
try {
final OutputStream outStream =
AccessController.doPrivileged(
new PrivilegedExceptionAction<OutputStream>() {
public OutputStream run() throws IOException {
return new FileOutputStream(tFile);
}
}
);
if (tracker != null) {
tracker.set(tFile, outStream);
}
try {
byte[] buf = new byte[8192];
for (;;) {
int bytesRead = fontStream.read(buf);
if (bytesRead < 0) {
break;
}
if (tracker != null) {
if (totalSize+bytesRead > CreatedFontTracker.MAX_FILE_SIZE) {
throw new IOException("File too big.");
}
if (totalSize+tracker.getNumBytes() >
CreatedFontTracker.MAX_TOTAL_BYTES)
{
throw new IOException("Total files too big.");
}
totalSize += bytesRead;
tracker.addBytes(bytesRead);
}
outStream.write(buf, 0, bytesRead);
}
/* don't close the input stream */
} finally {
outStream.close();
}
/* After all references to a Font2D are dropped, the file
* will be removed. To support long-lived AppContexts,
* we need to then decrement the byte count by the size
* of the file.
* If the data isn't a valid font, the implementation will
* delete the tmp file and decrement the byte count
* in the tracker object before returning from the
* constructor, so we can set 'copiedFontData' to true here
* without waiting for the results of that constructor.
*/
copiedFontData = true;
Font font = new Font(tFile, fontFormat, true, tracker);
return font;
} finally {
if (tracker != null) {
tracker.remove(tFile);
}
if (!copiedFontData) {
if (tracker != null) {
tracker.subBytes(totalSize);
}
AccessController.doPrivileged(
new PrivilegedExceptionAction<Void>() {
public Void run() {
tFile.delete();
return null;
}
}
);
}
}
} catch (Throwable t) {
if (t instanceof FontFormatException) {
throw (FontFormatException)t;
}
if (t instanceof IOException) {
throw (IOException)t;
}
Throwable cause = t.getCause();
if (cause instanceof FontFormatException) {
throw (FontFormatException)cause;
}
throw new IOException("Problem reading font data.");
}
}
/**
* Returns a new <code>Font</code> using the specified font type
* and the specified font file. The new <code>Font</code> is
* created with a point size of 1 and style {@link #PLAIN PLAIN}.
* This base font can then be used with the <code>deriveFont</code>
* methods in this class to derive new <code>Font</code> objects with
* varying sizes, styles, transforms and font features.
* @param fontFormat the type of the <code>Font</code>, which is
* {@link #TRUETYPE_FONT TRUETYPE_FONT} if a TrueType resource is
* specified or {@link #TYPE1_FONT TYPE1_FONT} if a Type 1 resource is
* specified.
* So long as the returned font, or its derived fonts are referenced
* the implementation may continue to access <code>fontFile</code>
* to retrieve font data. Thus the results are undefined if the file
* is changed, or becomes inaccessible.
* <p>
* To make the <code>Font</code> available to Font constructors the
* returned <code>Font</code> must be registered in the
* <code>GraphicsEnviroment</code> by calling
* {@link GraphicsEnvironment#registerFont(Font) registerFont(Font)}.
* @param fontFile a <code>File</code> object representing the
* input data for the font.
* @return a new <code>Font</code> created with the specified font type.
* @throws IllegalArgumentException if <code>fontFormat</code> is not
* <code>TRUETYPE_FONT</code>or<code>TYPE1_FONT</code>.
* @throws NullPointerException if <code>fontFile</code> is null.
* @throws IOException if the <code>fontFile</code> cannot be read.
* @throws FontFormatException if <code>fontFile</code> does
* not contain the required font tables for the specified format.
* @throws SecurityException if the executing code does not have
* permission to read from the file.
* @see GraphicsEnvironment#registerFont(Font)
* @since 1.5
*/
public static Font createFont(int fontFormat, File fontFile)
throws java.awt.FontFormatException, java.io.IOException {
fontFile = new File(fontFile.getPath());
if (fontFormat != Font.TRUETYPE_FONT &&
fontFormat != Font.TYPE1_FONT) {
throw new IllegalArgumentException ("font format not recognized");
}
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
FilePermission filePermission =
new FilePermission(fontFile.getPath(), "read");
sm.checkPermission(filePermission);
}
if (!fontFile.canRead()) {
throw new IOException("Can't read " + fontFile);
}
return new Font(fontFile, fontFormat, false, null);
}
/**
* Returns a copy of the transform associated with this
* <code>Font</code>. This transform is not necessarily the one
* used to construct the font. If the font has algorithmic
* superscripting or width adjustment, this will be incorporated
* into the returned <code>AffineTransform</code>.
* <p>
* Typically, fonts will not be transformed. Clients generally
* should call {@link #isTransformed} first, and only call this
* method if <code>isTransformed</code> returns true.
*
* @return an {@link AffineTransform} object representing the
* transform attribute of this <code>Font</code> object.
*/
public AffineTransform getTransform() {
/* The most common case is the identity transform. Most callers
* should call isTransformed() first, to decide if they need to
* get the transform, but some may not. Here we check to see
* if we have a nonidentity transform, and only do the work to
* fetch and/or compute it if so, otherwise we return a new
* identity transform.
*
* Note that the transform is _not_ necessarily the same as
* the transform passed in as an Attribute in a Map, as the
* transform returned will also reflect the effects of WIDTH and
* SUPERSCRIPT attributes. Clients who want the actual transform
* need to call getRequestedAttributes.
*/
if (nonIdentityTx) {
AttributeValues values = getAttributeValues();
AffineTransform at = values.isNonDefault(ETRANSFORM)
? new AffineTransform(values.getTransform())
: new AffineTransform();
if (values.getSuperscript() != 0) {
// can't get ascent and descent here, recursive call to this fn,
// so use pointsize
// let users combine super- and sub-scripting
int superscript = values.getSuperscript();
double trans = 0;
int n = 0;
boolean up = superscript > 0;
int sign = up ? -1 : 1;
int ss = up ? superscript : -superscript;
while ((ss & 7) > n) {
int newn = ss & 7;
trans += sign * (ssinfo[newn] - ssinfo[n]);
ss >>= 3;
sign = -sign;
n = newn;
}
trans *= pointSize;
double scale = Math.pow(2./3., n);
at.preConcatenate(AffineTransform.getTranslateInstance(0, trans));
at.scale(scale, scale);
// note on placement and italics
// We preconcatenate the transform because we don't want to translate along
// the italic angle, but purely perpendicular to the baseline. While this
// looks ok for superscripts, it can lead subscripts to stack on each other
// and bring the following text too close. The way we deal with potential
// collisions that can occur in the case of italics is by adjusting the
// horizontal spacing of the adjacent glyphvectors. Examine the italic
// angle of both vectors, if one is non-zero, compute the minimum ascent
// and descent, and then the x position at each for each vector along its
// italic angle starting from its (offset) baseline. Compute the difference
// between the x positions and use the maximum difference to adjust the
// position of the right gv.
}
if (values.isNonDefault(EWIDTH)) {
at.scale(values.getWidth(), 1f);
}
return at;
}
return new AffineTransform();
}
// x = r^0 + r^1 + r^2... r^n
// rx = r^1 + r^2 + r^3... r^(n+1)
// x - rx = r^0 - r^(n+1)
// x (1 - r) = r^0 - r^(n+1)
// x = (r^0 - r^(n+1)) / (1 - r)
// x = (1 - r^(n+1)) / (1 - r)
// scale ratio is 2/3
// trans = 1/2 of ascent * x
// assume ascent is 3/4 of point size
private static final float[] ssinfo = {
0.0f,
0.375f,
0.625f,
0.7916667f,
0.9027778f,
0.9768519f,
1.0262346f,
1.0591564f,
};
/**
* Returns the family name of this <code>Font</code>.
*
* <p>The family name of a font is font specific. Two fonts such as
* Helvetica Italic and Helvetica Bold have the same family name,
* <i>Helvetica</i>, whereas their font face names are
* <i>Helvetica Bold</i> and <i>Helvetica Italic</i>. The list of
* available family names may be obtained by using the
* {@link GraphicsEnvironment#getAvailableFontFamilyNames()} method.
*
* <p>Use <code>getName</code> to get the logical name of the font.
* Use <code>getFontName</code> to get the font face name of the font.
* @return a <code>String</code> that is the family name of this
* <code>Font</code>.
*
* @see #getName
* @see #getFontName
* @since JDK1.1
*/
public String getFamily() {
return getFamily_NoClientCode();
}
// NOTE: This method is called by privileged threads.
// We implement this functionality in a package-private
// method to insure that it cannot be overridden by client
// subclasses.
// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
final String getFamily_NoClientCode() {
return getFamily(Locale.getDefault());
}
/**
* Returns the family name of this <code>Font</code>, localized for
* the specified locale.
*
* <p>The family name of a font is font specific. Two fonts such as
* Helvetica Italic and Helvetica Bold have the same family name,
* <i>Helvetica</i>, whereas their font face names are
* <i>Helvetica Bold</i> and <i>Helvetica Italic</i>. The list of
* available family names may be obtained by using the
* {@link GraphicsEnvironment#getAvailableFontFamilyNames()} method.
*
* <p>Use <code>getFontName</code> to get the font face name of the font.
* @param l locale for which to get the family name
* @return a <code>String</code> representing the family name of the
* font, localized for the specified locale.
* @see #getFontName
* @see java.util.Locale
* @since 1.2
*/
public String getFamily(Locale l) {
if (l == null) {
throw new NullPointerException("null locale doesn't mean default");
}
return getFont2D().getFamilyName(l);
}
/**
* Returns the postscript name of this <code>Font</code>.
* Use <code>getFamily</code> to get the family name of the font.
* Use <code>getFontName</code> to get the font face name of the font.
* @return a <code>String</code> representing the postscript name of
* this <code>Font</code>.
* @since 1.2
*/
public String getPSName() {
return getFont2D().getPostscriptName();
}
/**
* Returns the logical name of this <code>Font</code>.
* Use <code>getFamily</code> to get the family name of the font.
* Use <code>getFontName</code> to get the font face name of the font.
* @return a <code>String</code> representing the logical name of
* this <code>Font</code>.
* @see #getFamily
* @see #getFontName
* @since JDK1.0
*/
public String getName() {
return name;
}
/**
* Returns the font face name of this <code>Font</code>. For example,
* Helvetica Bold could be returned as a font face name.
* Use <code>getFamily</code> to get the family name of the font.
* Use <code>getName</code> to get the logical name of the font.
* @return a <code>String</code> representing the font face name of
* this <code>Font</code>.
* @see #getFamily
* @see #getName
* @since 1.2
*/
public String getFontName() {
return getFontName(Locale.getDefault());
}
/**
* Returns the font face name of the <code>Font</code>, localized
* for the specified locale. For example, Helvetica Fett could be
* returned as the font face name.
* Use <code>getFamily</code> to get the family name of the font.
* @param l a locale for which to get the font face name
* @return a <code>String</code> representing the font face name,
* localized for the specified locale.
* @see #getFamily
* @see java.util.Locale
*/
public String getFontName(Locale l) {
if (l == null) {
throw new NullPointerException("null locale doesn't mean default");
}
return getFont2D().getFontName(l);
}
/**
* Returns the style of this <code>Font</code>. The style can be
* PLAIN, BOLD, ITALIC, or BOLD+ITALIC.
* @return the style of this <code>Font</code>
* @see #isPlain
* @see #isBold
* @see #isItalic
* @since JDK1.0
*/
public int getStyle() {
return style;
}
/**
* Returns the point size of this <code>Font</code>, rounded to
* an integer.
* Most users are familiar with the idea of using <i>point size</i> to
* specify the size of glyphs in a font. This point size defines a
* measurement between the baseline of one line to the baseline of the
* following line in a single spaced text document. The point size is
* based on <i>typographic points</i>, approximately 1/72 of an inch.
* <p>
* The Java(tm)2D API adopts the convention that one point is
* equivalent to one unit in user coordinates. When using a
* normalized transform for converting user space coordinates to
* device space coordinates 72 user
* space units equal 1 inch in device space. In this case one point
* is 1/72 of an inch.
* @return the point size of this <code>Font</code> in 1/72 of an
* inch units.
* @see #getSize2D
* @see GraphicsConfiguration#getDefaultTransform
* @see GraphicsConfiguration#getNormalizingTransform
* @since JDK1.0
*/
public int getSize() {
return size;
}
/**
* Returns the point size of this <code>Font</code> in
* <code>float</code> value.
* @return the point size of this <code>Font</code> as a
* <code>float</code> value.
* @see #getSize
* @since 1.2
*/
public float getSize2D() {
return pointSize;
}
/**
* Indicates whether or not this <code>Font</code> object's style is
* PLAIN.
* @return <code>true</code> if this <code>Font</code> has a
* PLAIN style;
* <code>false</code> otherwise.
* @see java.awt.Font#getStyle
* @since JDK1.0
*/
public boolean isPlain() {
return style == 0;
}
/**
* Indicates whether or not this <code>Font</code> object's style is
* BOLD.
* @return <code>true</code> if this <code>Font</code> object's
* style is BOLD;
* <code>false</code> otherwise.
* @see java.awt.Font#getStyle
* @since JDK1.0
*/
public boolean isBold() {
return (style & BOLD) != 0;
}
/**
* Indicates whether or not this <code>Font</code> object's style is
* ITALIC.
* @return <code>true</code> if this <code>Font</code> object's
* style is ITALIC;
* <code>false</code> otherwise.
* @see java.awt.Font#getStyle
* @since JDK1.0
*/
public boolean isItalic() {
return (style & ITALIC) != 0;
}
/**
* Indicates whether or not this <code>Font</code> object has a
* transform that affects its size in addition to the Size
* attribute.
* @return <code>true</code> if this <code>Font</code> object
* has a non-identity AffineTransform attribute.
* <code>false</code> otherwise.
* @see java.awt.Font#getTransform
* @since 1.4
*/
public boolean isTransformed() {
return nonIdentityTx;
}
/**
* Return true if this Font contains attributes that require extra
* layout processing.
* @return true if the font has layout attributes
* @since 1.6
*/
public boolean hasLayoutAttributes() {
return hasLayoutAttributes;
}
/**
* Returns a <code>Font</code> object from the system properties list.
* <code>nm</code> is treated as the name of a system property to be
* obtained. The <code>String</code> value of this property is then
* interpreted as a <code>Font</code> object according to the
* specification of <code>Font.decode(String)</code>
* If the specified property is not found, or the executing code does
* not have permission to read the property, null is returned instead.
*
* @param nm the property name
* @return a <code>Font</code> object that the property name
* describes, or null if no such property exists.
* @throws NullPointerException if nm is null.
* @since 1.2
* @see #decode(String)
*/
public static Font getFont(String nm) {
return getFont(nm, null);
}
/**
* Returns the <code>Font</code> that the <code>str</code>
* argument describes.
* To ensure that this method returns the desired Font,
* format the <code>str</code> parameter in
* one of these ways
*
* <ul>
* <li><em>fontname-style-pointsize</em>
* <li><em>fontname-pointsize</em>
* <li><em>fontname-style</em>
* <li><em>fontname</em>
* <li><em>fontname style pointsize</em>
* <li><em>fontname pointsize</em>
* <li><em>fontname style</em>
* <li><em>fontname</em>
* </ul>
* in which <i>style</i> is one of the four
* case-insensitive strings:
* <code>"PLAIN"</code>, <code>"BOLD"</code>, <code>"BOLDITALIC"</code>, or
* <code>"ITALIC"</code>, and pointsize is a positive decimal integer
* representation of the point size.
* For example, if you want a font that is Arial, bold, with
* a point size of 18, you would call this method with:
* "Arial-BOLD-18".
* This is equivalent to calling the Font constructor :
* <code>new Font("Arial", Font.BOLD, 18);</code>
* and the values are interpreted as specified by that constructor.
* <p>
* A valid trailing decimal field is always interpreted as the pointsize.
* Therefore a fontname containing a trailing decimal value should not
* be used in the fontname only form.
* <p>
* If a style name field is not one of the valid style strings, it is
* interpreted as part of the font name, and the default style is used.
* <p>
* Only one of ' ' or '-' may be used to separate fields in the input.
* The identified separator is the one closest to the end of the string
* which separates a valid pointsize, or a valid style name from
* the rest of the string.
* Null (empty) pointsize and style fields are treated
* as valid fields with the default value for that field.
*<p>
* Some font names may include the separator characters ' ' or '-'.
* If <code>str</code> is not formed with 3 components, e.g. such that
* <code>style</code> or <code>pointsize</code> fields are not present in
* <code>str</code>, and <code>fontname</code> also contains a
* character determined to be the separator character
* then these characters where they appear as intended to be part of
* <code>fontname</code> may instead be interpreted as separators
* so the font name may not be properly recognised.
*
* <p>
* The default size is 12 and the default style is PLAIN.
* If <code>str</code> does not specify a valid size, the returned
* <code>Font</code> has a size of 12. If <code>str</code> does not
* specify a valid style, the returned Font has a style of PLAIN.
* If you do not specify a valid font name in
* the <code>str</code> argument, this method will return
* a font with the family name "Dialog".
* To determine what font family names are available on
* your system, use the
* {@link GraphicsEnvironment#getAvailableFontFamilyNames()} method.
* If <code>str</code> is <code>null</code>, a new <code>Font</code>
* is returned with the family name "Dialog", a size of 12 and a
* PLAIN style.
* @param str the name of the font, or <code>null</code>
* @return the <code>Font</code> object that <code>str</code>
* describes, or a new default <code>Font</code> if
* <code>str</code> is <code>null</code>.
* @see #getFamily
* @since JDK1.1
*/
public static Font decode(String str) {
String fontName = str;
String styleName = "";
int fontSize = 12;
int fontStyle = Font.PLAIN;
if (str == null) {
return new Font(DIALOG, fontStyle, fontSize);
}
int lastHyphen = str.lastIndexOf('-');
int lastSpace = str.lastIndexOf(' ');
char sepChar = (lastHyphen > lastSpace) ? '-' : ' ';
int sizeIndex = str.lastIndexOf(sepChar);
int styleIndex = str.lastIndexOf(sepChar, sizeIndex-1);
int strlen = str.length();
if (sizeIndex > 0 && sizeIndex+1 < strlen) {
try {
fontSize =
Integer.valueOf(str.substring(sizeIndex+1)).intValue();
if (fontSize <= 0) {
fontSize = 12;
}
} catch (NumberFormatException e) {
/* It wasn't a valid size, if we didn't also find the
* start of the style string perhaps this is the style */
styleIndex = sizeIndex;
sizeIndex = strlen;
if (str.charAt(sizeIndex-1) == sepChar) {
sizeIndex--;
}
}
}
if (styleIndex >= 0 && styleIndex+1 < strlen) {
styleName = str.substring(styleIndex+1, sizeIndex);
styleName = styleName.toLowerCase(Locale.ENGLISH);
if (styleName.equals("bolditalic")) {
fontStyle = Font.BOLD | Font.ITALIC;
} else if (styleName.equals("italic")) {
fontStyle = Font.ITALIC;
} else if (styleName.equals("bold")) {
fontStyle = Font.BOLD;
} else if (styleName.equals("plain")) {
fontStyle = Font.PLAIN;
} else {
/* this string isn't any of the expected styles, so
* assume its part of the font name
*/
styleIndex = sizeIndex;
if (str.charAt(styleIndex-1) == sepChar) {
styleIndex--;
}
}
fontName = str.substring(0, styleIndex);
} else {
int fontEnd = strlen;
if (styleIndex > 0) {
fontEnd = styleIndex;
} else if (sizeIndex > 0) {
fontEnd = sizeIndex;
}
if (fontEnd > 0 && str.charAt(fontEnd-1) == sepChar) {
fontEnd--;
}
fontName = str.substring(0, fontEnd);
}
return new Font(fontName, fontStyle, fontSize);
}
/**
* Gets the specified <code>Font</code> from the system properties
* list. As in the <code>getProperty</code> method of
* <code>System</code>, the first
* argument is treated as the name of a system property to be
* obtained. The <code>String</code> value of this property is then
* interpreted as a <code>Font</code> object.
* <p>
* The property value should be one of the forms accepted by
* <code>Font.decode(String)</code>
* If the specified property is not found, or the executing code does not
* have permission to read the property, the <code>font</code>
* argument is returned instead.
* @param nm the case-insensitive property name
* @param font a default <code>Font</code> to return if property
* <code>nm</code> is not defined
* @return the <code>Font</code> value of the property.
* @throws NullPointerException if nm is null.
* @see #decode(String)
*/
public static Font getFont(String nm, Font font) {
String str = null;
try {
str =System.getProperty(nm);
} catch(SecurityException e) {
}
if (str == null) {
return font;
}
return decode ( str );
}
transient int hash;
/**
* Returns a hashcode for this <code>Font</code>.
* @return a hashcode value for this <code>Font</code>.
* @since JDK1.0
*/
public int hashCode() {
if (hash == 0) {
hash = name.hashCode() ^ style ^ size;
/* It is possible many fonts differ only in transform.
* So include the transform in the hash calculation.
* nonIdentityTx is set whenever there is a transform in
* 'values'. The tests for null are required because it can
* also be set for other reasons.
*/
if (nonIdentityTx &&
values != null && values.getTransform() != null) {
hash ^= values.getTransform().hashCode();
}
}
return hash;
}
/**
* Compares this <code>Font</code> object to the specified
* <code>Object</code>.
* @param obj the <code>Object</code> to compare
* @return <code>true</code> if the objects are the same
* or if the argument is a <code>Font</code> object
* describing the same font as this object;
* <code>false</code> otherwise.
* @since JDK1.0
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj != null) {
try {
Font font = (Font)obj;
if (size == font.size &&
style == font.style &&
nonIdentityTx == font.nonIdentityTx &&
hasLayoutAttributes == font.hasLayoutAttributes &&
pointSize == font.pointSize &&
name.equals(font.name)) {
/* 'values' is usually initialized lazily, except when
* the font is constructed from a Map, or derived using
* a Map or other values. So if only one font has
* the field initialized we need to initialize it in
* the other instance and compare.
*/
if (values == null) {
if (font.values == null) {
return true;
} else {
return getAttributeValues().equals(font.values);
}
} else {
return values.equals(font.getAttributeValues());
}
}
}
catch (ClassCastException e) {
}
}
return false;
}
/**
* Converts this <code>Font</code> object to a <code>String</code>
* representation.
* @return a <code>String</code> representation of this
* <code>Font</code> object.
* @since JDK1.0
*/
// NOTE: This method may be called by privileged threads.
// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
public String toString() {
String strStyle;
if (isBold()) {
strStyle = isItalic() ? "bolditalic" : "bold";
} else {
strStyle = isItalic() ? "italic" : "plain";
}
return getClass().getName() + "[family=" + getFamily() + ",name=" + name + ",style=" +
strStyle + ",size=" + size + "]";
} // toString()
/** Serialization support. A <code>readObject</code>
* method is neccessary because the constructor creates
* the font's peer, and we can't serialize the peer.
* Similarly the computed font "family" may be different
* at <code>readObject</code> time than at
* <code>writeObject</code> time. An integer version is
* written so that future versions of this class will be
* able to recognize serialized output from this one.
*/
/**
* The <code>Font</code> Serializable Data Form.
*
* @serial
*/
private int fontSerializedDataVersion = 1;
/**
* Writes default serializable fields to a stream.
*
* @param s the <code>ObjectOutputStream</code> to write
* @see AWTEventMulticaster#save(ObjectOutputStream, String, EventListener)
* @see #readObject(java.io.ObjectInputStream)
*/
private void writeObject(java.io.ObjectOutputStream s)
throws java.lang.ClassNotFoundException,
java.io.IOException
{
if (values != null) {
synchronized(values) {
// transient
fRequestedAttributes = values.toSerializableHashtable();
s.defaultWriteObject();
fRequestedAttributes = null;
}
} else {
s.defaultWriteObject();
}
}
/**
* Reads the <code>ObjectInputStream</code>.
* Unrecognized keys or values will be ignored.
*
* @param s the <code>ObjectInputStream</code> to read
* @serial
* @see #writeObject(java.io.ObjectOutputStream)
*/
private void readObject(java.io.ObjectInputStream s)
throws java.lang.ClassNotFoundException,
java.io.IOException
{
s.defaultReadObject();
if (pointSize == 0) {
pointSize = (float)size;
}
// Handle fRequestedAttributes.
// in 1.5, we always streamed out the font values plus
// TRANSFORM, SUPERSCRIPT, and WIDTH, regardless of whether the
// values were default or not. In 1.6 we only stream out
// defined values. So, 1.6 streams in from a 1.5 stream,
// it check each of these values and 'undefines' it if the
// value is the default.
if (fRequestedAttributes != null) {
values = getAttributeValues(); // init
AttributeValues extras =
AttributeValues.fromSerializableHashtable(fRequestedAttributes);
if (!AttributeValues.is16Hashtable(fRequestedAttributes)) {
extras.unsetDefault(); // if legacy stream, undefine these
}
values = getAttributeValues().merge(extras);
this.nonIdentityTx = values.anyNonDefault(EXTRA_MASK);
this.hasLayoutAttributes = values.anyNonDefault(LAYOUT_MASK);
fRequestedAttributes = null; // don't need it any more
}
}
/**
* Returns the number of glyphs in this <code>Font</code>. Glyph codes
* for this <code>Font</code> range from 0 to
* <code>getNumGlyphs()</code> - 1.
* @return the number of glyphs in this <code>Font</code>.
* @since 1.2
*/
public int getNumGlyphs() {
return getFont2D().getNumGlyphs();
}
/**
* Returns the glyphCode which is used when this <code>Font</code>
* does not have a glyph for a specified unicode code point.
* @return the glyphCode of this <code>Font</code>.
* @since 1.2
*/
public int getMissingGlyphCode() {
return getFont2D().getMissingGlyphCode();
}
/**
* Returns the baseline appropriate for displaying this character.
* <p>
* Large fonts can support different writing systems, and each system can
* use a different baseline.
* The character argument determines the writing system to use. Clients
* should not assume all characters use the same baseline.
*
* @param c a character used to identify the writing system
* @return the baseline appropriate for the specified character.
* @see LineMetrics#getBaselineOffsets
* @see #ROMAN_BASELINE
* @see #CENTER_BASELINE
* @see #HANGING_BASELINE
* @since 1.2
*/
public byte getBaselineFor(char c) {
return getFont2D().getBaselineFor(c);
}
/**
* Returns a map of font attributes available in this
* <code>Font</code>. Attributes include things like ligatures and
* glyph substitution.
* @return the attributes map of this <code>Font</code>.
*/
public Map<TextAttribute,?> getAttributes(){
return new AttributeMap(getAttributeValues());
}
/**
* Returns the keys of all the attributes supported by this
* <code>Font</code>. These attributes can be used to derive other
* fonts.
* @return an array containing the keys of all the attributes
* supported by this <code>Font</code>.
* @since 1.2
*/
public Attribute[] getAvailableAttributes() {
// FONT is not supported by Font
Attribute attributes[] = {
TextAttribute.FAMILY,
TextAttribute.WEIGHT,
TextAttribute.WIDTH,
TextAttribute.POSTURE,
TextAttribute.SIZE,
TextAttribute.TRANSFORM,
TextAttribute.SUPERSCRIPT,
TextAttribute.CHAR_REPLACEMENT,
TextAttribute.FOREGROUND,
TextAttribute.BACKGROUND,
TextAttribute.UNDERLINE,
TextAttribute.STRIKETHROUGH,
TextAttribute.RUN_DIRECTION,
TextAttribute.BIDI_EMBEDDING,
TextAttribute.JUSTIFICATION,
TextAttribute.INPUT_METHOD_HIGHLIGHT,
TextAttribute.INPUT_METHOD_UNDERLINE,
TextAttribute.SWAP_COLORS,
TextAttribute.NUMERIC_SHAPING,
TextAttribute.KERNING,
TextAttribute.LIGATURES,
TextAttribute.TRACKING,
};
return attributes;
}
/**
* Creates a new <code>Font</code> object by replicating this
* <code>Font</code> object and applying a new style and size.
* @param style the style for the new <code>Font</code>
* @param size the size for the new <code>Font</code>
* @return a new <code>Font</code> object.
* @since 1.2
*/
public Font deriveFont(int style, float size){
if (values == null) {
return new Font(name, style, size, createdFont, font2DHandle);
}
AttributeValues newValues = getAttributeValues().clone();
int oldStyle = (this.style != style) ? this.style : -1;
applyStyle(style, newValues);
newValues.setSize(size);
return new Font(newValues, null, oldStyle, createdFont, font2DHandle);
}
/**
* Creates a new <code>Font</code> object by replicating this
* <code>Font</code> object and applying a new style and transform.
* @param style the style for the new <code>Font</code>
* @param trans the <code>AffineTransform</code> associated with the
* new <code>Font</code>
* @return a new <code>Font</code> object.
* @throws IllegalArgumentException if <code>trans</code> is
* <code>null</code>
* @since 1.2
*/
public Font deriveFont(int style, AffineTransform trans){
AttributeValues newValues = getAttributeValues().clone();
int oldStyle = (this.style != style) ? this.style : -1;
applyStyle(style, newValues);
applyTransform(trans, newValues);
return new Font(newValues, null, oldStyle, createdFont, font2DHandle);
}
/**
* Creates a new <code>Font</code> object by replicating the current
* <code>Font</code> object and applying a new size to it.
* @param size the size for the new <code>Font</code>.
* @return a new <code>Font</code> object.
* @since 1.2
*/
public Font deriveFont(float size){
if (values == null) {
return new Font(name, style, size, createdFont, font2DHandle);
}
AttributeValues newValues = getAttributeValues().clone();
newValues.setSize(size);
return new Font(newValues, null, -1, createdFont, font2DHandle);
}
/**
* Creates a new <code>Font</code> object by replicating the current
* <code>Font</code> object and applying a new transform to it.
* @param trans the <code>AffineTransform</code> associated with the
* new <code>Font</code>
* @return a new <code>Font</code> object.
* @throws IllegalArgumentException if <code>trans</code> is
* <code>null</code>
* @since 1.2
*/
public Font deriveFont(AffineTransform trans){
AttributeValues newValues = getAttributeValues().clone();
applyTransform(trans, newValues);
return new Font(newValues, null, -1, createdFont, font2DHandle);
}
/**
* Creates a new <code>Font</code> object by replicating the current
* <code>Font</code> object and applying a new style to it.
* @param style the style for the new <code>Font</code>
* @return a new <code>Font</code> object.
* @since 1.2
*/
public Font deriveFont(int style){
if (values == null) {
return new Font(name, style, size, createdFont, font2DHandle);
}
AttributeValues newValues = getAttributeValues().clone();
int oldStyle = (this.style != style) ? this.style : -1;
applyStyle(style, newValues);
return new Font(newValues, null, oldStyle, createdFont, font2DHandle);
}
/**
* Creates a new <code>Font</code> object by replicating the current
* <code>Font</code> object and applying a new set of font attributes
* to it.
*
* @param attributes a map of attributes enabled for the new
* <code>Font</code>
* @return a new <code>Font</code> object.
* @since 1.2
*/
public Font deriveFont(Map<? extends Attribute, ?> attributes) {
if (attributes == null) {
return this;
}
AttributeValues newValues = getAttributeValues().clone();
newValues.merge(attributes, RECOGNIZED_MASK);
return new Font(newValues, name, style, createdFont, font2DHandle);
}
/**
* Checks if this <code>Font</code> has a glyph for the specified
* character.
*
* <p> <b>Note:</b> This method cannot handle <a
* href="../../java/lang/Character.html#supplementary"> supplementary
* characters</a>. To support all Unicode characters, including
* supplementary characters, use the {@link #canDisplay(int)}
* method or <code>canDisplayUpTo</code> methods.
*
* @param c the character for which a glyph is needed
* @return <code>true</code> if this <code>Font</code> has a glyph for this
* character; <code>false</code> otherwise.
* @since 1.2
*/
public boolean canDisplay(char c){
return getFont2D().canDisplay(c);
}
/**
* Checks if this <code>Font</code> has a glyph for the specified
* character.
*
* @param codePoint the character (Unicode code point) for which a glyph
* is needed.
* @return <code>true</code> if this <code>Font</code> has a glyph for the
* character; <code>false</code> otherwise.
* @throws IllegalArgumentException if the code point is not a valid Unicode
* code point.
* @see Character#isValidCodePoint(int)
* @since 1.5
*/
public boolean canDisplay(int codePoint) {
if (!Character.isValidCodePoint(codePoint)) {
throw new IllegalArgumentException("invalid code point: " +
Integer.toHexString(codePoint));
}
return getFont2D().canDisplay(codePoint);
}
/**
* Indicates whether or not this <code>Font</code> can display a
* specified <code>String</code>. For strings with Unicode encoding,
* it is important to know if a particular font can display the
* string. This method returns an offset into the <code>String</code>
* <code>str</code> which is the first character this
* <code>Font</code> cannot display without using the missing glyph
* code. If the <code>Font</code> can display all characters, -1 is
* returned.
* @param str a <code>String</code> object
* @return an offset into <code>str</code> that points
* to the first character in <code>str</code> that this
* <code>Font</code> cannot display; or <code>-1</code> if
* this <code>Font</code> can display all characters in
* <code>str</code>.
* @since 1.2
*/
public int canDisplayUpTo(String str) {
Font2D font2d = getFont2D();
int len = str.length();
for (int i = 0; i < len; i++) {
char c = str.charAt(i);
if (font2d.canDisplay(c)) {
continue;
}
if (!Character.isHighSurrogate(c)) {
return i;
}
if (!font2d.canDisplay(str.codePointAt(i))) {
return i;
}
i++;
}
return -1;
}
/**
* Indicates whether or not this <code>Font</code> can display
* the characters in the specified <code>text</code>
* starting at <code>start</code> and ending at
* <code>limit</code>. This method is a convenience overload.
* @param text the specified array of <code>char</code> values
* @param start the specified starting offset (in
* <code>char</code>s) into the specified array of
* <code>char</code> values
* @param limit the specified ending offset (in
* <code>char</code>s) into the specified array of
* <code>char</code> values
* @return an offset into <code>text</code> that points
* to the first character in <code>text</code> that this
* <code>Font</code> cannot display; or <code>-1</code> if
* this <code>Font</code> can display all characters in
* <code>text</code>.
* @since 1.2
*/
public int canDisplayUpTo(char[] text, int start, int limit) {
Font2D font2d = getFont2D();
for (int i = start; i < limit; i++) {
char c = text[i];
if (font2d.canDisplay(c)) {
continue;
}
if (!Character.isHighSurrogate(c)) {
return i;
}
if (!font2d.canDisplay(Character.codePointAt(text, i, limit))) {
return i;
}
i++;
}
return -1;
}
/**
* Indicates whether or not this <code>Font</code> can display the
* text specified by the <code>iter</code> starting at
* <code>start</code> and ending at <code>limit</code>.
*
* @param iter a {@link CharacterIterator} object
* @param start the specified starting offset into the specified
* <code>CharacterIterator</code>.
* @param limit the specified ending offset into the specified
* <code>CharacterIterator</code>.
* @return an offset into <code>iter</code> that points
* to the first character in <code>iter</code> that this
* <code>Font</code> cannot display; or <code>-1</code> if
* this <code>Font</code> can display all characters in
* <code>iter</code>.
* @since 1.2
*/
public int canDisplayUpTo(CharacterIterator iter, int start, int limit) {
Font2D font2d = getFont2D();
char c = iter.setIndex(start);
for (int i = start; i < limit; i++, c = iter.next()) {
if (font2d.canDisplay(c)) {
continue;
}
if (!Character.isHighSurrogate(c)) {
return i;
}
char c2 = iter.next();
// c2 could be CharacterIterator.DONE which is not a low surrogate.
if (!Character.isLowSurrogate(c2)) {
return i;
}
if (!font2d.canDisplay(Character.toCodePoint(c, c2))) {
return i;
}
i++;
}
return -1;
}
/**
* Returns the italic angle of this <code>Font</code>. The italic angle
* is the inverse slope of the caret which best matches the posture of this
* <code>Font</code>.
* @see TextAttribute#POSTURE
* @return the angle of the ITALIC style of this <code>Font</code>.
*/
public float getItalicAngle() {
return getItalicAngle(null);
}
/* The FRC hints don't affect the value of the italic angle but
* we need to pass them in to look up a strike.
* If we can pass in ones already being used it can prevent an extra
* strike from being allocated. Note that since italic angle is
* a property of the font, the font transform is needed not the
* device transform. Finally, this is private but the only caller of this
* in the JDK - and the only likely caller - is in this same class.
*/
private float getItalicAngle(FontRenderContext frc) {
Object aa, fm;
if (frc == null) {
aa = RenderingHints.VALUE_TEXT_ANTIALIAS_OFF;
fm = RenderingHints.VALUE_FRACTIONALMETRICS_OFF;
} else {
aa = frc.getAntiAliasingHint();
fm = frc.getFractionalMetricsHint();
}
return getFont2D().getItalicAngle(this, identityTx, aa, fm);
}
/**
* Checks whether or not this <code>Font</code> has uniform
* line metrics. A logical <code>Font</code> might be a
* composite font, which means that it is composed of different
* physical fonts to cover different code ranges. Each of these
* fonts might have different <code>LineMetrics</code>. If the
* logical <code>Font</code> is a single
* font then the metrics would be uniform.
* @return <code>true</code> if this <code>Font</code> has
* uniform line metrics; <code>false</code> otherwise.
*/
public boolean hasUniformLineMetrics() {
return false; // REMIND always safe, but prevents caller optimize
}
private transient SoftReference<FontLineMetrics> flmref;
private FontLineMetrics defaultLineMetrics(FontRenderContext frc) {
FontLineMetrics flm = null;
if (flmref == null
|| (flm = flmref.get()) == null
|| !flm.frc.equals(frc)) {
/* The device transform in the frc is not used in obtaining line
* metrics, although it probably should be: REMIND find why not?
* The font transform is used but its applied in getFontMetrics, so
* just pass identity here
*/
float [] metrics = new float[8];
getFont2D().getFontMetrics(this, identityTx,
frc.getAntiAliasingHint(),
frc.getFractionalMetricsHint(),
metrics);
float ascent = metrics[0];
float descent = metrics[1];
float leading = metrics[2];
float ssOffset = 0;
if (values != null && values.getSuperscript() != 0) {
ssOffset = (float)getTransform().getTranslateY();
ascent -= ssOffset;
descent += ssOffset;
}
float height = ascent + descent + leading;
int baselineIndex = 0; // need real index, assumes roman for everything
// need real baselines eventually
float[] baselineOffsets = { 0, (descent/2f - ascent) / 2f, -ascent };
float strikethroughOffset = metrics[4];
float strikethroughThickness = metrics[5];
float underlineOffset = metrics[6];
float underlineThickness = metrics[7];
float italicAngle = getItalicAngle(frc);
if (isTransformed()) {
AffineTransform ctx = values.getCharTransform(); // extract rotation
if (ctx != null) {
Point2D.Float pt = new Point2D.Float();
pt.setLocation(0, strikethroughOffset);
ctx.deltaTransform(pt, pt);
strikethroughOffset = pt.y;
pt.setLocation(0, strikethroughThickness);
ctx.deltaTransform(pt, pt);
strikethroughThickness = pt.y;
pt.setLocation(0, underlineOffset);
ctx.deltaTransform(pt, pt);
underlineOffset = pt.y;
pt.setLocation(0, underlineThickness);
ctx.deltaTransform(pt, pt);
underlineThickness = pt.y;
}
}
strikethroughOffset += ssOffset;
underlineOffset += ssOffset;
CoreMetrics cm = new CoreMetrics(ascent, descent, leading, height,
baselineIndex, baselineOffsets,
strikethroughOffset, strikethroughThickness,
underlineOffset, underlineThickness,
ssOffset, italicAngle);
flm = new FontLineMetrics(0, cm, frc);
flmref = new SoftReference<FontLineMetrics>(flm);
}
return (FontLineMetrics)flm.clone();
}
/**
* Returns a {@link LineMetrics} object created with the specified
* <code>String</code> and {@link FontRenderContext}.
* @param str the specified <code>String</code>
* @param frc the specified <code>FontRenderContext</code>
* @return a <code>LineMetrics</code> object created with the
* specified <code>String</code> and {@link FontRenderContext}.
*/
public LineMetrics getLineMetrics( String str, FontRenderContext frc) {
FontLineMetrics flm = defaultLineMetrics(frc);
flm.numchars = str.length();
return flm;
}
/**
* Returns a <code>LineMetrics</code> object created with the
* specified arguments.
* @param str the specified <code>String</code>
* @param beginIndex the initial offset of <code>str</code>
* @param limit the end offset of <code>str</code>
* @param frc the specified <code>FontRenderContext</code>
* @return a <code>LineMetrics</code> object created with the
* specified arguments.
*/
public LineMetrics getLineMetrics( String str,
int beginIndex, int limit,
FontRenderContext frc) {
FontLineMetrics flm = defaultLineMetrics(frc);
int numChars = limit - beginIndex;
flm.numchars = (numChars < 0)? 0: numChars;
return flm;
}
/**
* Returns a <code>LineMetrics</code> object created with the
* specified arguments.
* @param chars an array of characters
* @param beginIndex the initial offset of <code>chars</code>
* @param limit the end offset of <code>chars</code>
* @param frc the specified <code>FontRenderContext</code>
* @return a <code>LineMetrics</code> object created with the
* specified arguments.
*/
public LineMetrics getLineMetrics(char [] chars,
int beginIndex, int limit,
FontRenderContext frc) {
FontLineMetrics flm = defaultLineMetrics(frc);
int numChars = limit - beginIndex;
flm.numchars = (numChars < 0)? 0: numChars;
return flm;
}
/**
* Returns a <code>LineMetrics</code> object created with the
* specified arguments.
* @param ci the specified <code>CharacterIterator</code>
* @param beginIndex the initial offset in <code>ci</code>
* @param limit the end offset of <code>ci</code>
* @param frc the specified <code>FontRenderContext</code>
* @return a <code>LineMetrics</code> object created with the
* specified arguments.
*/
public LineMetrics getLineMetrics(CharacterIterator ci,
int beginIndex, int limit,
FontRenderContext frc) {
FontLineMetrics flm = defaultLineMetrics(frc);
int numChars = limit - beginIndex;
flm.numchars = (numChars < 0)? 0: numChars;
return flm;
}
/**
* Returns the logical bounds of the specified <code>String</code> in
* the specified <code>FontRenderContext</code>. The logical bounds
* contains the origin, ascent, advance, and height, which includes
* the leading. The logical bounds does not always enclose all the
* text. For example, in some languages and in some fonts, accent
* marks can be positioned above the ascent or below the descent.
* To obtain a visual bounding box, which encloses all the text,
* use the {@link TextLayout#getBounds() getBounds} method of
* <code>TextLayout</code>.
* <p>Note: The returned bounds is in baseline-relative coordinates
* (see {@link java.awt.Font class notes}).
* @param str the specified <code>String</code>
* @param frc the specified <code>FontRenderContext</code>
* @return a {@link Rectangle2D} that is the bounding box of the
* specified <code>String</code> in the specified
* <code>FontRenderContext</code>.
* @see FontRenderContext
* @see Font#createGlyphVector
* @since 1.2
*/
public Rectangle2D getStringBounds( String str, FontRenderContext frc) {
char[] array = str.toCharArray();
return getStringBounds(array, 0, array.length, frc);
}
/**
* Returns the logical bounds of the specified <code>String</code> in
* the specified <code>FontRenderContext</code>. The logical bounds
* contains the origin, ascent, advance, and height, which includes
* the leading. The logical bounds does not always enclose all the
* text. For example, in some languages and in some fonts, accent
* marks can be positioned above the ascent or below the descent.
* To obtain a visual bounding box, which encloses all the text,
* use the {@link TextLayout#getBounds() getBounds} method of
* <code>TextLayout</code>.
* <p>Note: The returned bounds is in baseline-relative coordinates
* (see {@link java.awt.Font class notes}).
* @param str the specified <code>String</code>
* @param beginIndex the initial offset of <code>str</code>
* @param limit the end offset of <code>str</code>
* @param frc the specified <code>FontRenderContext</code>
* @return a <code>Rectangle2D</code> that is the bounding box of the
* specified <code>String</code> in the specified
* <code>FontRenderContext</code>.
* @throws IndexOutOfBoundsException if <code>beginIndex</code> is
* less than zero, or <code>limit</code> is greater than the
* length of <code>str</code>, or <code>beginIndex</code>
* is greater than <code>limit</code>.
* @see FontRenderContext
* @see Font#createGlyphVector
* @since 1.2
*/
public Rectangle2D getStringBounds( String str,
int beginIndex, int limit,
FontRenderContext frc) {
String substr = str.substring(beginIndex, limit);
return getStringBounds(substr, frc);
}
/**
* Returns the logical bounds of the specified array of characters
* in the specified <code>FontRenderContext</code>. The logical
* bounds contains the origin, ascent, advance, and height, which
* includes the leading. The logical bounds does not always enclose
* all the text. For example, in some languages and in some fonts,
* accent marks can be positioned above the ascent or below the
* descent. To obtain a visual bounding box, which encloses all the
* text, use the {@link TextLayout#getBounds() getBounds} method of
* <code>TextLayout</code>.
* <p>Note: The returned bounds is in baseline-relative coordinates
* (see {@link java.awt.Font class notes}).
* @param chars an array of characters
* @param beginIndex the initial offset in the array of
* characters
* @param limit the end offset in the array of characters
* @param frc the specified <code>FontRenderContext</code>
* @return a <code>Rectangle2D</code> that is the bounding box of the
* specified array of characters in the specified
* <code>FontRenderContext</code>.
* @throws IndexOutOfBoundsException if <code>beginIndex</code> is
* less than zero, or <code>limit</code> is greater than the
* length of <code>chars</code>, or <code>beginIndex</code>
* is greater than <code>limit</code>.
* @see FontRenderContext
* @see Font#createGlyphVector
* @since 1.2
*/
public Rectangle2D getStringBounds(char [] chars,
int beginIndex, int limit,
FontRenderContext frc) {
if (beginIndex < 0) {
throw new IndexOutOfBoundsException("beginIndex: " + beginIndex);
}
if (limit > chars.length) {
throw new IndexOutOfBoundsException("limit: " + limit);
}
if (beginIndex > limit) {
throw new IndexOutOfBoundsException("range length: " +
(limit - beginIndex));
}
// this code should be in textlayout
// quick check for simple text, assume GV ok to use if simple
boolean simple = values == null ||
(values.getKerning() == 0 && values.getLigatures() == 0 &&
values.getBaselineTransform() == null);
if (simple) {
simple = ! FontUtilities.isComplexText(chars, beginIndex, limit);
}
if (simple) {
GlyphVector gv = new StandardGlyphVector(this, chars, beginIndex,
limit - beginIndex, frc);
return gv.getLogicalBounds();
} else {
// need char array constructor on textlayout
String str = new String(chars, beginIndex, limit - beginIndex);
TextLayout tl = new TextLayout(str, this, frc);
return new Rectangle2D.Float(0, -tl.getAscent(), tl.getAdvance(),
tl.getAscent() + tl.getDescent() +
tl.getLeading());
}
}
/**
* Returns the logical bounds of the characters indexed in the
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