/*
* Copyright 1998-2003 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
*
* (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
*/
package ae.sun.font;
import ae.java.awt.Font;
import ae.java.awt.font.FontRenderContext;
import ae.java.awt.font.LineMetrics;
public class StandardTextSource extends TextSource {
char[] chars;
int start;
int len;
int cstart;
int clen;
int level; // assumed all uniform
int flags; // see GlyphVector.java
Font font;
FontRenderContext frc;
CoreMetrics cm;
/**
* Create a simple implementation of a TextSource.
*
* Chars is an array containing clen chars in the context, in
* logical order, contiguously starting at cstart. Start and len
* represent that portion of the context representing the true
* source; start, like cstart, is relative to the start of the
* character array.
*
* Level is the bidi level (0-63 for the entire context. Flags is
* the layout flags. Font is the font, frc is the render context,
* and lm is the line metrics for the entire source text, but not
* necessarily the context.
*/
public StandardTextSource(char[] chars,
int start,
int len,
int cstart,
int clen,
int level,
int flags,
Font font,
FontRenderContext frc,
CoreMetrics cm) {
if (chars == null) {
throw new IllegalArgumentException("bad chars: null");
}
if (cstart < 0) {
throw new IllegalArgumentException("bad cstart: " + cstart);
}
if (start < cstart) {
throw new IllegalArgumentException("bad start: " + start + " for cstart: " + cstart);
}
if (clen < 0) {
throw new IllegalArgumentException("bad clen: " + clen);
}
if (cstart + clen > chars.length) {
throw new IllegalArgumentException("bad clen: " + clen + " cstart: " + cstart + " for array len: " + chars.length);
}
if (len < 0) {
throw new IllegalArgumentException("bad len: " + len);
}
if ((start + len) > (cstart + clen)) {
throw new IllegalArgumentException("bad len: " + len + " start: " + start + " for cstart: " + cstart + " clen: " + clen);
}
if (font == null) {
throw new IllegalArgumentException("bad font: null");
}
if (frc == null) {
throw new IllegalArgumentException("bad frc: null");
}
this.chars = chars;
this.start = start;
this.len = len;
this.cstart = cstart;
this.clen = clen;
this.level = level;
this.flags = flags;
this.font = font;
this.frc = frc;
if (cm != null) {
this.cm = cm;
} else {
LineMetrics metrics = font.getLineMetrics(chars, cstart, clen, frc);
this.cm = ((FontLineMetrics)metrics).cm;
}
}
/** Create a StandardTextSource whose context is coextensive with the source. */
public StandardTextSource(char[] chars,
int start,
int len,
int level,
int flags,
Font font,
FontRenderContext frc,
CoreMetrics cm) {
this(chars, start, len, start, len, level, flags, font, frc, cm);
}
/** Create a StandardTextSource whose context and source are coextensive with the entire char array. */
public StandardTextSource(char[] chars,
int level,
int flags,
Font font,
FontRenderContext frc) {
this(chars, 0, chars.length, 0, chars.length, level, flags, font, frc, null);
}
/** Create a StandardTextSource whose context and source are all the text in the String. */
public StandardTextSource(String str,
int level,
int flags,
Font font,
FontRenderContext frc) {
this(str.toCharArray(), 0, str.length(), 0, str.length(), level, flags, font, frc, null);
}
// TextSource API
public char[] getChars() {
return chars;
}
public int getStart() {
return start;
}
public int getLength() {
return len;
}
public int getContextStart() {
return cstart;
}
public int getContextLength() {
return clen;
}
public int getLayoutFlags() {
return flags;
}
public int getBidiLevel() {
return level;
}
public Font getFont() {
return font;
}
public FontRenderContext getFRC() {
return frc;
}
public CoreMetrics getCoreMetrics() {
return cm;
}
public TextSource getSubSource(int start, int length, int dir) {
if (start < 0 || length < 0 || (start + length) > len) {
throw new IllegalArgumentException("bad start (" + start + ") or length (" + length + ")");
}
int level = this.level;
if (dir != TextLineComponent.UNCHANGED) {
boolean ltr = (flags & 0x8) == 0;
if (!(dir == TextLineComponent.LEFT_TO_RIGHT && ltr) &&
!(dir == TextLineComponent.RIGHT_TO_LEFT && !ltr)) {
throw new IllegalArgumentException("direction flag is invalid");
}
level = ltr? 0 : 1;
}
return new StandardTextSource(chars, this.start + start, length, cstart, clen, level, flags, font, frc, cm);
}
public String toString() {
return toString(WITH_CONTEXT);
}
public String toString(boolean withContext) {
StringBuffer buf = new StringBuffer(super.toString());
buf.append("[start:");
buf.append(start);
buf.append(", len:" );
buf.append(len);
buf.append(", cstart:");
buf.append(cstart);
buf.append(", clen:" );
buf.append(clen);
buf.append(", chars:\"");
int chStart, chLimit;
if (withContext == WITH_CONTEXT) {
chStart = cstart;
chLimit = cstart + clen;
}
else {
chStart = start;
chLimit = start + len;
}
for (int i = chStart; i < chLimit; ++i) {
if (i > chStart) {
buf.append(" ");
}
buf.append(Integer.toHexString(chars[i]));
}
buf.append("\"");
buf.append(", level:");
buf.append(level);
buf.append(", flags:");
buf.append(flags);
buf.append(", font:");
buf.append(font);
buf.append(", frc:");
buf.append(frc);
buf.append(", cm:");
buf.append(cm);
buf.append("]");
return buf.toString();
}
}