--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/font/TextLabelFactory.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,181 @@
+/*
+ * 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 sun.font;
+
+import java.awt.Font;
+
+import java.awt.font.FontRenderContext;
+import java.awt.font.LineMetrics;
+import java.text.Bidi;
+
+ /**
+ * A factory for text labels. Basically this just holds onto the stuff that
+ * doesn't change-- the render context, context, and bidi info for the context-- and gets
+ * called for each subrange you want to create.
+ *
+ * @see Font
+ * @see FontRenderContext
+ * @see GlyphVector
+ * @see TextLabel
+ * @see ExtendedTextLabel
+ * @see Bidi
+ * @see TextLayout
+ */
+
+public class TextLabelFactory {
+ private FontRenderContext frc;
+ private char[] text;
+ private Bidi bidi;
+ private Bidi lineBidi;
+ private int flags;
+ private int lineStart;
+ private int lineLimit;
+
+ /**
+ * Initialize a factory to produce glyph arrays.
+ * @param frc the FontRenderContext to use for the arrays to be produced.
+ * @param text the text of the paragraph.
+ * @param bidi the bidi information for the paragraph text, or null if the
+ * entire text is left-to-right text.
+ */
+ public TextLabelFactory(FontRenderContext frc,
+ char[] text,
+ Bidi bidi,
+ int flags) {
+ this.frc = frc;
+ this.text = text;
+ this.bidi = bidi;
+ this.flags = flags;
+ this.lineBidi = bidi;
+ this.lineStart = 0;
+ this.lineLimit = text.length;
+ }
+
+ public FontRenderContext getFontRenderContext() {
+ return frc;
+ }
+
+ public char[] getText() {
+ return text;
+ }
+
+ public Bidi getParagraphBidi() {
+ return bidi;
+ }
+
+ public Bidi getLineBidi() {
+ return lineBidi;
+ }
+
+ public int getLayoutFlags() {
+ return flags;
+ }
+
+ public int getLineStart() {
+ return lineStart;
+ }
+
+ public int getLineLimit() {
+ return lineLimit;
+ }
+
+ /**
+ * Set a line context for the factory. Shaping only occurs on this line.
+ * Characters are ordered as they would appear on this line.
+ * @param lineStart the index within the text of the start of the line.
+ * @param lineLimit the index within the text of the limit of the line.
+ */
+ public void setLineContext(int lineStart, int lineLimit) {
+ this.lineStart = lineStart;
+ this.lineLimit = lineLimit;
+ if (bidi != null) {
+ lineBidi = bidi.createLineBidi(lineStart, lineLimit);
+ }
+ }
+
+ /**
+ * Create an extended glyph array for the text between start and limit.
+ *
+ * @param font the font to use to generate glyphs and character positions.
+ * @param start the start of the subrange for which to create the glyph array
+ * @param limit the limit of the subrange for which to create glyph array
+ *
+ * Start and limit must be within the bounds of the current line. If no
+ * line context has been set, the entire text is used as the current line.
+ * The text between start and limit will be treated as though it all has
+ * the same bidi level (and thus the same directionality) as the character
+ * at start. Clients should ensure that all text between start and limit
+ * has the same bidi level for the current line.
+ */
+ public ExtendedTextLabel createExtended(Font font,
+ CoreMetrics lm,
+ Decoration decorator,
+ int start,
+ int limit) {
+
+ if (start >= limit || start < lineStart || limit > lineLimit) {
+ throw new IllegalArgumentException("bad start: " + start + " or limit: " + limit);
+ }
+
+ int level = lineBidi == null ? 0 : lineBidi.getLevelAt(start - lineStart);
+ int linedir = (lineBidi == null || lineBidi.baseIsLeftToRight()) ? 0 : 1;
+ int layoutFlags = flags & ~0x9; // remove bidi, line direction flags
+ if ((level & 0x1) != 0) layoutFlags |= 1; // rtl
+ if ((linedir & 0x1) != 0) layoutFlags |= 8; // line rtl
+
+ TextSource source = new StandardTextSource(text, start, limit - start, lineStart, lineLimit - lineStart, level, layoutFlags, font, frc, lm);
+ return new ExtendedTextSourceLabel(source, decorator);
+ }
+
+ /**
+ * Create a simple glyph array for the text between start and limit.
+ *
+ * @param font the font to use to generate glyphs and character positions.
+ * @param start the start of the subrange for which to create the glyph array
+ * @param limit the limit of the subrange for which to create glyph array
+ */
+ public TextLabel createSimple(Font font,
+ CoreMetrics lm,
+ int start,
+ int limit) {
+
+ if (start >= limit || start < lineStart || limit > lineLimit) {
+ throw new IllegalArgumentException("bad start: " + start + " or limit: " + limit);
+ }
+
+ int level = lineBidi == null ? 0 : lineBidi.getLevelAt(start - lineStart);
+ int linedir = (lineBidi == null || lineBidi.baseIsLeftToRight()) ? 0 : 1;
+ int layoutFlags = flags & ~0x9; // remove bidi, line direction flags
+ if ((level & 0x1) != 0) layoutFlags |= 1; // rtl
+ if ((linedir & 0x1) != 0) layoutFlags |= 8; // line rtl
+ TextSource source = new StandardTextSource(text, start, limit - start, lineStart, lineLimit - lineStart, level, layoutFlags, font, frc, lm);
+ return new TextSourceLabel(source);
+ }
+}