| /* |
| * Copyright (c) 1998, 2003, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| /* |
| * |
| * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved |
| */ |
| |
| package sun.font; |
| |
| import java.awt.Font; |
| import java.awt.font.FontRenderContext; |
| import 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(); |
| } |
| } |