/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package flash.fonts;
import flash.swf.builder.types.PathIteratorWrapper;
import flash.swf.builder.types.ShapeBuilder;
import flash.swf.types.GlyphEntry;
import flash.swf.types.Shape;
import flash.swf.SwfConstants;
import flash.util.Trace;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphMetrics;
import java.awt.font.GlyphVector;
import java.awt.font.TextAttribute;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.BufferedInputStream;
import java.net.URL;
import java.util.Locale;
import java.util.Map;
import java.util.ArrayList;
import java.util.HashMap;
/**
* The <code>JREFontManager</code> attempts to optimize the loading of
* JDK fonts through caching of <code>FontSet</code>s. A
* <code>FontSet</code> keeps track of the different styles (faces)
* for a given font family as <code>FontFace</code> instances. A
* manager can derive available styles from a single
* <code>FontFace</code> through its reference to a
* <code>java.awt.Font</code> object.
*
* @author Peter Farland
*/
@SuppressWarnings("unchecked")
public class JREFontManager extends CachedFontManager
{
private boolean readLocalFonts;
private Map<String, LocalFont> localFonts;
public static String LOCAL_FONTS_SNAPSHOT = "flex.fonts-snapshot";
private String localFontsFile;
public void initialize(Map map)
{
super.initialize(map);
if (map != null)
{
localFontsFile = (String)map.get(LOCAL_FONTS_SNAPSHOT);
}
if (localFontsFile == null)
{
localFontsFile = "localFonts.ser";
}
}
protected String createFontFromLocation(Object location, int requestedStyle, boolean useTwips)
{
String family = null;
InputStream is = null;
try
{
if (location != null && location instanceof URL)
{
URL url = (URL)location;
if (url.getProtocol().toLowerCase().indexOf("file") > -1)
{
File f = new File(url.getFile());
// Do NOT buffer this stream, Font.createFont() does it for us.
is = new FileInputStream(f);
}
else
{
is = url.openStream();
}
Font font = Font.createFont(Font.TRUETYPE_FONT, is);
// Get the family and fontName info before we derive a new size as
// the name might be reset to dialog!
family = font.getFamily();
String fontName = font.getFontName(Locale.ENGLISH);
// Prior to Flex 4 we tried to validate that the requested style
// matched the style of the font.
if (majorCompatibilityVersion < 4)
{
// We need to examine the name for the real style as
// Font.createFont always sets style to PLAIN and the user
// may have given us the wrong style info
int guessedStyle = CachedFontFace.guessStyleFromSubFamilyName(fontName);
// Only bother deriving a font and storing the work if this
// really was the style requested
if (requestedStyle != guessedStyle)
return null;
}
// Now that we've processed the font with the JRE font manager, we now need to get the fsType
// and copyright info from from Batik. This is a bit strange, as one of the advantages of the
// JRE font manager is that it can process some fonts that Batik cannot. This check is needed,
// though, anytime we create a font. So it may mean we don't need the JRE font manager anymore,
// but since I'm not sure of that, it'll be kept in for awhile.
String locationStr = BatikFontManager.processLocation(location);
org.apache.flex.forks.batik.svggen.font.Font batikFont = org.apache.flex.forks.batik.svggen.font.Font.create(locationStr);
if (batikFont == null)
{
throw new FontFormatException ("Unable to create font." );
}
FSType type = FSType.getFSType(batikFont);
if (! type.usableByFlex)
{
throw new BatikFontManager.UnusableFontLicense(location + "", type.description);
}
String copyright = batikFont.getNameTable().getRecord((short)0);
String trademark = batikFont.getNameTable().getRecord((short)7);
// Set to a default size so metrics are established
// getAttributes() returns a Map which is based on a Hashtable of <Obj,Obj>, or <TA,Obj> in practice
// we need to suppress the cast because getAttributes defines the return type as <TA,?>
Map<TextAttribute, Object> attributes = (Map<TextAttribute, Object>) font.getAttributes();
attributes.put(TextAttribute.FAMILY, family);
attributes.put(TextAttribute.SIZE, DEFAULT_FONT_SIZE_OBJECT);
attributes.put(TextAttribute.POSTURE, CachedFontFace.isItalic(requestedStyle) ? TextAttribute.POSTURE_OBLIQUE : TextAttribute.POSTURE_REGULAR);
attributes.put(TextAttribute.WEIGHT, CachedFontFace.isBold(requestedStyle) ? TextAttribute.WEIGHT_BOLD : TextAttribute.WEIGHT_REGULAR);
font = font.deriveFont(attributes);
FontSet fontSet = (FontSet)getFontCache().get(family);
if (fontSet == null)
{
fontSet = new FontSet(maxFacesPerFont);
getFontCache().put(family, fontSet);
}
fontSet.put(requestedStyle, new JREFontFace(font, requestedStyle, maxGlyphsPerFace, type, copyright, trademark, useTwips));
}
}
catch (FileNotFoundException ex)
{
return null;
}
catch (FontFormatException ex)
{
return null;
}
catch (IOException ex)
{
return null;
}
finally
{
try
{
is.close();
}
catch (Throwable t)
{
}
}
return family;
}
/**
* Attempts to load a font from the cache by location or from disk if it is the first
* request at this address. The location is bound to a font family name after the initial
* loading, and the relationship exists for the lifetime of the cache.
*
* @param location
* @param style
* @return FontSet.FontFace
*/
public FontFace getEntryFromLocation(URL location, int style, boolean useTwips)
{
FontFace entry = null;
Object fam = getFontFileCache().get(location);
if (fam == null)
{
fam = createFontFromLocation(location, style, useTwips);
}
if (fam != null)
{
String family = fam.toString();
FontSet fontSet = (FontSet)getFontCache().get(family);
// The font file cache should still have this family
// from the location fetch above...
if (fontSet != null)
{
entry = fontSet.get(style);
}
}
return entry;
}
private static ArrayList<String> systemFontNames = null;
protected FontSet createSetForSystemFont(String family, int style, boolean useTwips)
{
FontSet fontSet = null;
if (family != null)
{
if (systemFontNames == null)
initializeSystemFonts();
if (systemFontNames != null && !systemFontNames.contains(family.trim().toLowerCase()))
{
if (Trace.font)
Trace.trace("Font family '" + family + "' not known to JRE.");
return null;
}
//Load a font by family and style, set size to 240 for greater granularity
Font font = Font.decode(family + "-" + getStyleAsString(style) + "-" + DEFAULT_FONT_SIZE_STRING);
fontSet = new FontSet(maxFacesPerFont);
fontSet.put(font.getStyle(), new JREFontFace(font, font.getStyle(), maxGlyphsPerFace, null, null, null, useTwips));
}
return fontSet;
}
/**
* Attempts to locate a font by family name and style from the JRE's list of
* fonts, which are primarily system registered fonts.
*
* @param familyName
* @param style - either Font.PLAIN, Font.BOLD, Font.ITALIC or Font.BOLD+Font.ITALIC
* @return FontSet.FontFace
*/
public FontFace getEntryFromSystem(String familyName, int style, boolean useTwips)
{
if (! readLocalFonts)
{
readLocalFonts();
}
FontFace entry = null;
FontSet fontSet = (FontSet)getFontCache().get(familyName);
// This is likely to be the first time looking for this family
if (fontSet == null)
{
fontSet = createSetForSystemFont(familyName, style, useTwips);
}
// If the family was invalid on the OS there's nothing more we can do here
if (fontSet != null)
{
entry = fontSet.get(style);
}
if (entry != null)
{
LocalFont font = localFonts.get(entry.getPostscriptName());
if (font == null)
{
// silent failure
if (Trace.font)
{
Trace.trace("Information on font " + familyName + " could not be found. Run FontSnapshot to get a list of the current local fonts.");
}
}
else
{
entry.setCopyright(font.copyright);
entry.setTrademark(font.trademark);
entry.setFSType(FSType.getFSType(font.fsType));
}
}
return entry;
}
private void readLocalFonts()
{
readLocalFonts = true;
localFonts = new HashMap<String, LocalFont>();
// initDefaultLocalFonts();
try
{
InputStream buffStream = new BufferedInputStream(new FileInputStream(localFontsFile));
ObjectInputStream in = new ObjectInputStream(buffStream);
// there's no way around suppressing the cast warning from Object, the types get erased anyway
Map<String, LocalFont> customLocalFonts = (Map<String, LocalFont>)in.readObject();
localFonts.putAll(customLocalFonts);
}
catch(FileNotFoundException fnfe)
{
// ignore... a message will be printed out later if needed
if (Trace.font)
{
fnfe.printStackTrace();
}
}
catch(Exception fnfe)
{
if (Trace.font)
{
Trace.trace("Could not read localFonts.ser: " + fnfe);
}
}
}
private String getStyleAsString(int style)
{
String styleName;
switch (style)
{
case 1:
styleName = "bold";
break;
case 2:
styleName = "italic";
break;
case 3:
styleName = "bolditalic";
break;
default:
styleName = "plain";
}
return styleName;
}
private static void initializeSystemFonts()
{
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fnts = ge.getAvailableFontFamilyNames();
if (fnts != null)
{
systemFontNames = new ArrayList<String>(fnts.length);
for (int i = 0; i < fnts.length; i++)
{
systemFontNames.add(fnts[i].trim().toLowerCase());
}
}
}
public static class JREFontFace extends CachedFontFace
{
// FIXME: need to deal with useTwips differently for caching
public JREFontFace(Font font, int style, int maxGlyph, FSType fsType, String copyright, String trademark, boolean useTwips)
{
super(maxGlyph, style, fsType, copyright, trademark, useTwips);
this.font = font;
init();
}
private void init()
{
//Convert from device to grid co-ordinates, fixed at 72dpi
emScale = SWF_EM_SQUARE / getPointSize(); //If you want to correct for resolution, multiply this value by 72/resolution
scaleTransform = new AffineTransform();
scaleTransform.setToScale(emScale, emScale);
//We use a BufferedImage to get to the system FontMetrics...
//Feel free to suggest a better way of getting this object.
if (graphics == null)
{
BufferedImage bi = new BufferedImage(50, 50, BufferedImage.TYPE_INT_RGB);
graphics = bi.createGraphics();
graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}
fontMetrics = graphics.getFontMetrics(font);
frc = new FontRenderContext(null, true, false);
ascent = (int)Math.rint(fontMetrics.getAscent() * emScale * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1));
descent = (int)Math.rint(fontMetrics.getDescent() * emScale * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1));
//Ignore JDK leading values, they never match Flash MX - using an estimation technique similar to Breeze instead.
//leading = (int)StrictMath.rint(fontMetrics.getLeading() * emScale);
//if (leading == 0)
lineGap = (int)Math.rint(Math.abs((getPointSize() - ascent - descent)));
}
public boolean canDisplay(char c)
{
return font.canDisplay(c);
}
public String getFamily()
{
return font.getName();
}
public int getFirstChar()
{
return 0;
}
public GlyphEntry getGlyphEntry(char c)
{
return (GlyphEntry)glyphCache.get(c);
}
protected GlyphEntry createGlyphEntry(char c)
{
return createGlyphEntry(c, c);
}
public GlyphEntry createGlyphEntry(char c, char referenceChar)
{
Shape swfShape = null;
int advance = 0;
GlyphVector gv = font.createGlyphVector(frc, new char[]{referenceChar});
java.awt.Shape glyphOutline = gv.getGlyphOutline(0);
GlyphMetrics metrics = gv.getGlyphMetrics(0);
advance = (int)Math.rint(metrics.getAdvance()); //Do not scale here, DefineText needs values unscaled
java.awt.Shape scaledShape = scaleTransform.createTransformedShape(glyphOutline);
swfShape = createGlyphShape(scaledShape);
GlyphEntry ge = new GlyphEntry();
ge = new GlyphEntry(); //Note: we will set the index on building DefineFont2 tag
ge.advance = (int)(advance * emScale * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1));
ge.shape = swfShape;
//Glyph bounds are not used by the Flash Player so no need to calculate
//Rectangle2D bs = scaledShape.getBounds2D();
//bounds = new Rect((int)StrictMath.rint(bs.getMinX() * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1)),
// (int)StrictMath.rint(bs.getMaxX() * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1)),
// (int)StrictMath.rint(bs.getMinY() * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1)),
// (int)StrictMath.rint(bs.getMaxY()) * (useTwips ? SwfConstants.TWIPS_PER_PIXEL : 1));
//ge.bounds = bounds;
ge.character = c;
return ge;
}
private Shape createGlyphShape(java.awt.Shape outline)
{
ShapeBuilder shape = new ShapeBuilder(useTwips);
shape.setCurrentLineStyle(0);
shape.setCurrentFillStyle1(1);
shape.setUseFillStyle1(true);
shape.processShape(new PathIteratorWrapper(outline.getPathIterator(null)));
return shape.build();
}
public int getAdvance(char c)
{
return 0; //To change body of implemented methods use File | Settings | File Templates.
}
public Font getFont()
{
return font;
}
public int getMissingGlyphCode()
{
return font.getMissingGlyphCode();
}
public double getPointSize()
{
return font.getSize2D();
}
public FontRenderContext getFontRenderContext()
{
return frc;
}
public int getAscent()
{
return ascent;
}
public int getDescent()
{
return descent;
}
public int getLineGap()
{
return lineGap;
}
public int getNumGlyphs()
{
return font.getNumGlyphs();
}
public double getEmScale()
{
return emScale;
}
public String getPostscriptName()
{
return font.getPSName();
}
private Font font;
private static Graphics2D graphics;
private FontRenderContext frc;
private FontMetrics fontMetrics;
private int ascent;
private int descent;
private int lineGap;
private double emScale;
private AffineTransform scaleTransform;
}
}