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/*
* Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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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.");