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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/sun/font/TextLabelFactory.java (1 of 18352 files). Show all

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java/pkg/sun/font/TextLabelFactory.java+181−0
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1+/*
2+ * Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+/*
26+ *
27+ * (C) Copyright IBM Corp. 1998-2003 All Rights Reserved
28+ */
29+
30+package sun.font;
31+
32+import java.awt.Font;
33+
34+import java.awt.font.FontRenderContext;
35+import java.awt.font.LineMetrics;
36+import java.text.Bidi;
37+
38+ /**
39+ * A factory for text labels. Basically this just holds onto the stuff that
40+ * doesn't change-- the render context, context, and bidi info for the context-- and gets
41+ * called for each subrange you want to create.
42+ *
43+ * @see Font
44+ * @see FontRenderContext
45+ * @see GlyphVector
46+ * @see TextLabel
47+ * @see ExtendedTextLabel
48+ * @see Bidi
49+ * @see TextLayout
50+ */
51+
52+public class TextLabelFactory {
53+ private FontRenderContext frc;
54+ private char[] text;
55+ private Bidi bidi;
56+ private Bidi lineBidi;
57+ private int flags;
58+ private int lineStart;
59+ private int lineLimit;
60+
61+ /**
62+ * Initialize a factory to produce glyph arrays.
63+ * @param frc the FontRenderContext to use for the arrays to be produced.
64+ * @param text the text of the paragraph.
65+ * @param bidi the bidi information for the paragraph text, or null if the
66+ * entire text is left-to-right text.
67+ */
68+ public TextLabelFactory(FontRenderContext frc,
69+ char[] text,
70+ Bidi bidi,
71+ int flags) {
72+ this.frc = frc;
73+ this.text = text;
74+ this.bidi = bidi;
75+ this.flags = flags;
76+ this.lineBidi = bidi;
77+ this.lineStart = 0;
78+ this.lineLimit = text.length;
79+ }
80+
81+ public FontRenderContext getFontRenderContext() {
82+ return frc;
83+ }
84+
85+ public char[] getText() {
86+ return text;
87+ }
88+
89+ public Bidi getParagraphBidi() {
90+ return bidi;
91+ }
92+
93+ public Bidi getLineBidi() {
94+ return lineBidi;
95+ }
96+
97+ public int getLayoutFlags() {
98+ return flags;
99+ }
100+
101+ public int getLineStart() {
102+ return lineStart;
103+ }
104+
105+ public int getLineLimit() {
106+ return lineLimit;
107+ }
108+
109+ /**
110+ * Set a line context for the factory. Shaping only occurs on this line.
111+ * Characters are ordered as they would appear on this line.
112+ * @param lineStart the index within the text of the start of the line.
113+ * @param lineLimit the index within the text of the limit of the line.
114+ */
115+ public void setLineContext(int lineStart, int lineLimit) {
116+ this.lineStart = lineStart;
117+ this.lineLimit = lineLimit;
118+ if (bidi != null) {
119+ lineBidi = bidi.createLineBidi(lineStart, lineLimit);
120+ }
121+ }
122+
123+ /**
124+ * Create an extended glyph array for the text between start and limit.
125+ *
126+ * @param font the font to use to generate glyphs and character positions.
127+ * @param start the start of the subrange for which to create the glyph array
128+ * @param limit the limit of the subrange for which to create glyph array
129+ *
130+ * Start and limit must be within the bounds of the current line. If no
131+ * line context has been set, the entire text is used as the current line.
132+ * The text between start and limit will be treated as though it all has
133+ * the same bidi level (and thus the same directionality) as the character
134+ * at start. Clients should ensure that all text between start and limit
135+ * has the same bidi level for the current line.
136+ */
137+ public ExtendedTextLabel createExtended(Font font,
138+ CoreMetrics lm,
139+ Decoration decorator,
140+ int start,
141+ int limit) {
142+
143+ if (start >= limit || start < lineStart || limit > lineLimit) {
144+ throw new IllegalArgumentException("bad start: " + start + " or limit: " + limit);
145+ }
146+
147+ int level = lineBidi == null ? 0 : lineBidi.getLevelAt(start - lineStart);
148+ int linedir = (lineBidi == null || lineBidi.baseIsLeftToRight()) ? 0 : 1;
149+ int layoutFlags = flags & ~0x9; // remove bidi, line direction flags
150+ if ((level & 0x1) != 0) layoutFlags |= 1; // rtl
151+ if ((linedir & 0x1) != 0) layoutFlags |= 8; // line rtl
152+
153+ TextSource source = new StandardTextSource(text, start, limit - start, lineStart, lineLimit - lineStart, level, layoutFlags, font, frc, lm);
154+ return new ExtendedTextSourceLabel(source, decorator);
155+ }
156+
157+ /**
158+ * Create a simple glyph array for the text between start and limit.
159+ *
160+ * @param font the font to use to generate glyphs and character positions.
161+ * @param start the start of the subrange for which to create the glyph array
162+ * @param limit the limit of the subrange for which to create glyph array
163+ */
164+ public TextLabel createSimple(Font font,
165+ CoreMetrics lm,
166+ int start,
167+ int limit) {
168+
169+ if (start >= limit || start < lineStart || limit > lineLimit) {
170+ throw new IllegalArgumentException("bad start: " + start + " or limit: " + limit);
171+ }
172+
173+ int level = lineBidi == null ? 0 : lineBidi.getLevelAt(start - lineStart);
174+ int linedir = (lineBidi == null || lineBidi.baseIsLeftToRight()) ? 0 : 1;
175+ int layoutFlags = flags & ~0x9; // remove bidi, line direction flags
176+ if ((level & 0x1) != 0) layoutFlags |= 1; // rtl
177+ if ((linedir & 0x1) != 0) layoutFlags |= 8; // line rtl
178+ TextSource source = new StandardTextSource(text, start, limit - start, lineStart, lineLimit - lineStart, level, layoutFlags, font, frc, lm);
179+ return new TextSourceLabel(source);
180+ }
181+}