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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XFontPeer.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XFontPeer.java | 770 |
1 files changed, 770 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XFontPeer.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XFontPeer.java new file mode 100644 index 000000000..4372c965f --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XFontPeer.java @@ -0,0 +1,770 @@ +/* XFontPeer.java -- The font peer for X + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.awt.peer.x; + +import gnu.java.lang.CPStringBuilder; + +import java.awt.AWTError; +import java.awt.Font; +import java.awt.FontMetrics; +import java.awt.GraphicsDevice; +import java.awt.GraphicsEnvironment; +import java.awt.font.FontRenderContext; +import java.awt.font.GlyphVector; +import java.awt.font.LineMetrics; +import java.awt.font.TextAttribute; +import java.awt.geom.Rectangle2D; +import java.io.IOException; +import java.io.InputStream; +import java.text.CharacterIterator; +import java.util.HashMap; +import java.util.Iterator; +import java.util.Locale; +import java.util.Map; +import java.util.Properties; + +import gnu.java.awt.peer.ClasspathFontPeer; +import gnu.x11.Display; +import gnu.x11.Fontable; + +/** + * The bridge from AWT to X fonts. + * + * @author Roman Kennke (kennke@aicas.com) + */ +public class XFontPeer + extends ClasspathFontPeer +{ + + /** + * The font mapping as specified in the file fonts.properties. + */ + private static Properties fontProperties; + static + { + fontProperties = new Properties(); + InputStream in = XFontPeer.class.getResourceAsStream("xfonts.properties"); + try + { + fontProperties.load(in); + } + catch (IOException e) + { + e.printStackTrace(); + } + } + + /** + * The FontMetrics implementation for XFontPeer. + */ + private class XFontMetrics + extends FontMetrics + { + /** + * The ascent of the font. + */ + int ascent; + + /** + * The descent of the font. + */ + int descent; + + /** + * The maximum of the character advances. + */ + private int maxAdvance; + + /** + * The internal leading. + */ + int leading; + + /** + * Cached string metrics. This caches string metrics locally so that the + * server doesn't have to be asked each time. + */ + private HashMap metricsCache; + + /** + * The widths of the characters indexed by the characters themselves. + */ + private int[] charWidths; + + /** + * Creates a new XFontMetrics for the specified font. + * + * @param font the font + */ + protected XFontMetrics(Font font) + { + super(font); + metricsCache = new HashMap(); + Fontable.FontInfo info = getXFont().info(); + ascent = info.font_ascent(); + descent = info.font_descent(); + maxAdvance = info.max_bounds().character_width(); + leading = 0; // TODO: Not provided by X. Possible not needed. + + if (info.min_byte1() == 0 && info.max_byte1() == 0) + readCharWidthsLinear(info); + else + readCharWidthsNonLinear(info); + } + + /** + * Reads the character widths when specified in a linear fashion. That is + * when the min-byte1 and max-byte2 fields are both zero in the X protocol. + * + * @param info the font info reply + */ + private void readCharWidthsLinear(Fontable.FontInfo info) + { + int startIndex = info.min_char_or_byte2(); + int endIndex = info.max_char_or_byte2(); + charWidths = new int[endIndex + 1]; + // All the characters before startIndex are zero width. + for (int i = 0; i < startIndex; i++) + { + charWidths[i] = 0; + } + // All the other character info is fetched from the font info. + int index = startIndex; + Fontable.FontInfo.CharInfo[] charInfos = info.char_infos(); + for (Fontable.FontInfo.CharInfo charInfo : charInfos) + { + charWidths[index] = charInfo.character_width(); + index++; + } + } + + private void readCharWidthsNonLinear(Fontable.FontInfo info) + { + // TODO: Implement. + throw new UnsupportedOperationException("Not yet implemented"); + } + + /** + * Returns the ascent of the font. + * + * @return the ascent of the font + */ + public int getAscent() + { + return ascent; + } + + /** + * Returns the descent of the font. + * + * @return the descent of the font + */ + public int getDescent() + { + return descent; + } + + /** + * Returns the overall height of the font. This is the distance from + * baseline to baseline (usually ascent + descent + leading). + * + * @return the overall height of the font + */ + public int getHeight() + { + return ascent + descent; + } + + /** + * Returns the leading of the font. + * + * @return the leading of the font + */ + public int getLeading() + { + return leading; + } + + /** + * Returns the maximum advance for this font. + * + * @return the maximum advance for this font + */ + public int getMaxAdvance() + { + return maxAdvance; + } + + /** + * Determines the width of the specified character <code>c</code>. + * + * @param c the character + * + * @return the width of the character + */ + public int charWidth(char c) + { + int width; + if (c > charWidths.length) + width = charWidths['?']; + else + width = charWidths[c]; + return width; + } + + /** + * Determines the overall width of the specified string. + * + * @param c the char buffer holding the string + * @param offset the starting offset of the string in the buffer + * @param length the number of characters in the string buffer + * + * @return the overall width of the specified string + */ + public int charsWidth(char[] c, int offset, int length) + { + int width = 0; + if (c.length > 0 && length > 0) + { + String s = new String(c, offset, length); + width = stringWidth(s); + } + return width; + } + + /** + * Determines the overall width of the specified string. + * + * @param s the string + * + * @return the overall width of the specified string + */ + public int stringWidth(String s) + { + int width = 0; + if (s.length() > 0) + { + if (metricsCache.containsKey(s)) + { + width = ((Integer) metricsCache.get(s)).intValue(); + } + else + { + Fontable.TextExtentInfo extents = getXFont().text_extent(s); + /* + System.err.println("string: '" + s + "' : "); + System.err.println("ascent: " + extents.getAscent()); + System.err.println("descent: " + extents.getDescent()); + System.err.println("overall ascent: " + extents.getOverallAscent()); + System.err.println("overall descent: " + extents.getOverallDescent()); + System.err.println("overall width: " + extents.getOverallWidth()); + System.err.println("overall left: " + extents.getOverallLeft()); + System.err.println("overall right: " + extents.getOverallRight()); + */ + width = extents.overall_width(); // + extents.overall_left(); + //System.err.println("String: " + s + ", width: " + width); + metricsCache.put(s, new Integer(width)); + } + } + //System.err.print("stringWidth: '" + s + "': "); + //System.err.println(width); + return width; + } + } + + /** + * The LineMetrics implementation for the XFontPeer. + */ + private class XLineMetrics + extends LineMetrics + { + + /** + * Returns the ascent of the font. + * + * @return the ascent of the font + */ + public float getAscent() + { + return fontMetrics.ascent; + } + + public int getBaselineIndex() + { + // FIXME: Implement this. + throw new UnsupportedOperationException(); + } + + public float[] getBaselineOffsets() + { + // FIXME: Implement this. + throw new UnsupportedOperationException(); + } + + /** + * Returns the descent of the font. + * + * @return the descent of the font + */ + public float getDescent() + { + return fontMetrics.descent; + } + + /** + * Returns the overall height of the font. This is the distance from + * baseline to baseline (usually ascent + descent + leading). + * + * @return the overall height of the font + */ + public float getHeight() + { + return fontMetrics.ascent + fontMetrics.descent; + } + + /** + * Returns the leading of the font. + * + * @return the leading of the font + */ + public float getLeading() + { + return fontMetrics.leading; + } + + public int getNumChars() + { + // FIXME: Implement this. + throw new UnsupportedOperationException(); + } + + public float getStrikethroughOffset() + { + return 0.F; // TODO: Provided by X?? + } + + public float getStrikethroughThickness() + { + return 1.F; // TODO: Provided by X?? + } + + public float getUnderlineOffset() + { + return 0.F; // TODO: Provided by X?? + } + + public float getUnderlineThickness() + { + return 1.F; // TODO: Provided by X?? + } + + } + + /** + * The X font. + */ + private gnu.x11.Font xfont; + + private String name; + + private int style; + + private int size; + + /** + * The font metrics for this font. + */ + XFontMetrics fontMetrics; + + /** + * Creates a new XFontPeer for the specified font name, style and size. + * + * @param name the font name + * @param style the font style (bold / italic / normal) + * @param size the size of the font + */ + public XFontPeer(String name, int style, int size) + { + super(name, style, size); + this.name = name; + this.style = style; + this.size = size; + } + + /** + * Creates a new XFontPeer for the specified font name and style + * attributes. + * + * @param name the font name + * @param atts the font attributes + */ + public XFontPeer(String name, Map atts) + { + super(name, atts); + String family = name; + if (family == null || family.equals("")) + family = (String) atts.get(TextAttribute.FAMILY); + if (family == null) + family = "SansSerif"; + + int size = 12; + Float sizeFl = (Float) atts.get(TextAttribute.SIZE); + if (sizeFl != null) + size = sizeFl.intValue(); + + int style = 0; + // Detect italic attribute. + Float posture = (Float) atts.get(TextAttribute.POSTURE); + if (posture != null && !posture.equals(TextAttribute.POSTURE_REGULAR)) + style |= Font.ITALIC; + + // Detect bold attribute. + Float weight = (Float) atts.get(TextAttribute.WEIGHT); + if (weight != null && weight.compareTo(TextAttribute.WEIGHT_REGULAR) > 0) + style |= Font.BOLD; + + this.name = name; + this.style = style; + this.size = size; + } + + /** + * Initializes the font peer with the specified attributes. This method is + * called from both constructors. + * + * @param name the font name + * @param style the font style + * @param size the font size + */ + private void init(String name, int style, int size) + { + if (name == null) + { + name = "SansSerif"; + } + GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment(); + GraphicsDevice dev = env.getDefaultScreenDevice(); + if (dev instanceof XGraphicsDevice) + { + Display display = ((XGraphicsDevice) dev).getDisplay(); + String fontDescr = encodeFont(name, style, size); + if (XToolkit.DEBUG) + System.err.println("XLFD font description: " + fontDescr); + xfont = new gnu.x11.Font(display, fontDescr); + } + else + { + throw new AWTError("Local GraphicsEnvironment is not XWindowGraphicsEnvironment"); + } + } + + public boolean canDisplay(Font font, int c) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public int canDisplayUpTo(Font font, CharacterIterator i, int start, int limit) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public String getSubFamilyName(Font font, Locale locale) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public String getPostScriptName(Font font) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public int getNumGlyphs(Font font) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public int getMissingGlyphCode(Font font) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public byte getBaselineFor(Font font, char c) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public String getGlyphName(Font font, int glyphIndex) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public GlyphVector createGlyphVector(Font font, FontRenderContext frc, + CharacterIterator ci) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public GlyphVector createGlyphVector(Font font, FontRenderContext ctx, + int[] glyphCodes) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public GlyphVector layoutGlyphVector(Font font, FontRenderContext frc, + char[] chars, int start, int limit, + int flags) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + /** + * Returns the font metrics for the specified font. + * + * @param font the font for which to fetch the font metrics + * + * @return the font metrics for the specified font + */ + public FontMetrics getFontMetrics(Font font) + { + if (font.getPeer() != this) + throw new AWTError("The specified font has a different peer than this"); + + if (fontMetrics == null) + fontMetrics = new XFontMetrics(font); + return fontMetrics; + } + + /** + * Frees the font in the X server. + */ + protected void finalize() + { + if (xfont != null) + xfont.close(); + } + + public boolean hasUniformLineMetrics(Font font) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + /** + * Returns the line metrics for this font and the specified string and + * font render context. + */ + public LineMetrics getLineMetrics(Font font, CharacterIterator ci, int begin, + int limit, FontRenderContext rc) + { + return new XLineMetrics(); + } + + public Rectangle2D getMaxCharBounds(Font font, FontRenderContext rc) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + public Rectangle2D getStringBounds(Font font, CharacterIterator ci, + int begin, int limit, FontRenderContext frc) + { + // TODO: Implement this. + throw new UnsupportedOperationException("Not yet implemented."); + } + + /** + * Encodes a font name + style + size specification into a X logical font + * description (XLFD) as described here: + * + * http://www.meretrx.com/e93/docs/xlfd.html + * + * This is implemented to look up the font description in the + * fonts.properties of this package. + * + * @param name the font name + * @param atts the text attributes + * + * @return the encoded font description + */ + static String encodeFont(String name, Map atts) + { + String family = name; + if (family == null || family.equals("")) + family = (String) atts.get(TextAttribute.FAMILY); + if (family == null) + family = "SansSerif"; + + int size = 12; + Float sizeFl = (Float) atts.get(TextAttribute.SIZE); + if (sizeFl != null) + size = sizeFl.intValue(); + + int style = 0; + // Detect italic attribute. + Float posture = (Float) atts.get(TextAttribute.POSTURE); + if (posture != null && !posture.equals(TextAttribute.POSTURE_REGULAR)) + style |= Font.ITALIC; + + // Detect bold attribute. + Float weight = (Float) atts.get(TextAttribute.WEIGHT); + if (weight != null && weight.compareTo(TextAttribute.WEIGHT_REGULAR) > 0) + style |= Font.BOLD; + + return encodeFont(family, style, size); + } + + /** + * Encodes a font name + style + size specification into a X logical font + * description (XLFD) as described here: + * + * http://www.meretrx.com/e93/docs/xlfd.html + * + * This is implemented to look up the font description in the + * fonts.properties of this package. + * + * @param name the font name + * @param style the font style + * @param size the font size + * + * @return the encoded font description + */ + static String encodeFont(String name, int style, int size) + { + CPStringBuilder key = new CPStringBuilder(); + key.append(validName(name)); + key.append('.'); + switch (style) + { + case Font.BOLD: + key.append("bold"); + break; + case Font.ITALIC: + key.append("italic"); + break; + case (Font.BOLD | Font.ITALIC): + key.append("bolditalic"); + break; + case Font.PLAIN: + default: + key.append("plain"); + + } + + String protoType = fontProperties.getProperty(key.toString()); + int s = validSize(size); + return protoType.replaceFirst("%d", String.valueOf(s)); + } + + /** + * Checks the specified font name for a valid font name. If the font name + * is not known, then this returns 'sansserif' as fallback. + * + * @param name the font name to check + * + * @return a valid font name + */ + static String validName(String name) + { + String retVal; + if (name.equalsIgnoreCase("sansserif") + || name.equalsIgnoreCase("serif") + || name.equalsIgnoreCase("monospaced") + || name.equalsIgnoreCase("dialog") + || name.equalsIgnoreCase("dialoginput")) + { + retVal = name.toLowerCase(); + } + else + { + retVal = "sansserif"; + } + return retVal; + } + + /** + * Translates an arbitrary point size to a size that is typically available + * on an X server. These are the sizes 8, 10, 12, 14, 18 and 24. + * + * @param size the queried size + * @return the real available size + */ + private static final int validSize(int size) + { + int val; + if (size <= 9) + val = 8; + else if (size <= 11) + val = 10; + else if (size <= 13) + val = 12; + else if (size <= 17) + val = 14; + else if (size <= 23) + val = 18; + else + val = 24; + return val; + } + + /** + * Returns the X Font reference. This lazily loads the font when first + * requested. + * + * @return the X Font reference + */ + gnu.x11.Font getXFont() + { + if (xfont == null) + { + init(name, style, size); + } + return xfont; + } +} |