author | mchung |
Tue, 29 Sep 2009 16:03:03 -0700 | |
changeset 3938 | ef327bd847c0 |
parent 1725 | 3be564c67d63 |
child 5506 | 202f599c92aa |
permissions | -rw-r--r-- |
2 | 1 |
/* |
2 |
* Copyright 1998-2006 Sun Microsystems, Inc. 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. Sun designates this |
|
8 |
* particular file as subject to the "Classpath" exception as provided |
|
9 |
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
|
22 |
* CA 95054 USA or visit www.sun.com if you need additional information or |
|
23 |
* have any questions. |
|
24 |
*/ |
|
25 |
/* |
|
26 |
* |
|
27 |
* (C) Copyright IBM Corp. 1998, All Rights Reserved |
|
28 |
*/ |
|
29 |
||
30 |
package sun.font; |
|
31 |
||
32 |
import java.awt.BasicStroke; |
|
33 |
import java.awt.Graphics2D; |
|
34 |
import java.awt.Shape; |
|
35 |
import java.awt.Stroke; |
|
36 |
||
37 |
import java.awt.geom.GeneralPath; |
|
38 |
import java.awt.geom.Line2D; |
|
39 |
||
40 |
import java.awt.font.TextAttribute; |
|
41 |
||
42 |
import java.util.concurrent.ConcurrentHashMap; |
|
43 |
||
44 |
/** |
|
45 |
* This class provides drawing and bounds-measurement of |
|
46 |
* underlines. Additionally, it has a factory method for |
|
47 |
* obtaining underlines from values of underline attributes. |
|
48 |
*/ |
|
49 |
||
50 |
abstract class Underline { |
|
51 |
||
52 |
/** |
|
53 |
* Draws the underline into g2d. The thickness should be obtained |
|
54 |
* from a LineMetrics object. Note that some underlines ignore the |
|
55 |
* thickness parameter. |
|
56 |
* The underline is drawn from (x1, y) to (x2, y). |
|
57 |
*/ |
|
58 |
abstract void drawUnderline(Graphics2D g2d, |
|
59 |
float thickness, |
|
60 |
float x1, |
|
61 |
float x2, |
|
62 |
float y); |
|
63 |
||
64 |
/** |
|
65 |
* Returns the bottom of the bounding rectangle for this underline. |
|
66 |
*/ |
|
67 |
abstract float getLowerDrawLimit(float thickness); |
|
68 |
||
69 |
/** |
|
70 |
* Returns a Shape representing the underline. The thickness should be obtained |
|
71 |
* from a LineMetrics object. Note that some underlines ignore the |
|
72 |
* thickness parameter. |
|
73 |
*/ |
|
74 |
abstract Shape getUnderlineShape(float thickness, |
|
75 |
float x1, |
|
76 |
float x2, |
|
77 |
float y); |
|
78 |
||
79 |
// Implementation of underline for standard and Input Method underlines. |
|
80 |
// These classes are private. |
|
81 |
||
82 |
// IM Underlines ignore thickness param, and instead use |
|
83 |
// DEFAULT_THICKNESS |
|
84 |
private static final float DEFAULT_THICKNESS = 1.0f; |
|
85 |
||
86 |
// StandardUnderline's constructor takes a boolean param indicating |
|
87 |
// whether to override the default thickness. These values clarify |
|
88 |
// the semantics of the parameter. |
|
89 |
private static final boolean USE_THICKNESS = true; |
|
90 |
private static final boolean IGNORE_THICKNESS = false; |
|
91 |
||
92 |
// Implementation of standard underline and all input method underlines |
|
93 |
// except UNDERLINE_LOW_GRAY. |
|
94 |
private static final class StandardUnderline extends Underline { |
|
95 |
||
96 |
// the amount by which to move the underline |
|
97 |
private float shift; |
|
98 |
||
99 |
// the actual line thickness is this value times |
|
100 |
// the requested thickness |
|
101 |
private float thicknessMultiplier; |
|
102 |
||
103 |
// if non-null, underline is drawn with a BasicStroke |
|
104 |
// with this dash pattern |
|
105 |
private float[] dashPattern; |
|
106 |
||
107 |
// if false, all underlines are DEFAULT_THICKNESS thick |
|
108 |
// if true, use thickness param |
|
109 |
private boolean useThickness; |
|
110 |
||
111 |
// cached BasicStroke |
|
112 |
private BasicStroke cachedStroke; |
|
113 |
||
114 |
StandardUnderline(float shift, |
|
115 |
float thicknessMultiplier, |
|
116 |
float[] dashPattern, |
|
117 |
boolean useThickness) { |
|
118 |
||
119 |
this.shift = shift; |
|
120 |
this.thicknessMultiplier = thicknessMultiplier; |
|
121 |
this.dashPattern = dashPattern; |
|
122 |
this.useThickness = useThickness; |
|
123 |
this.cachedStroke = null; |
|
124 |
} |
|
125 |
||
126 |
private BasicStroke createStroke(float lineThickness) { |
|
127 |
||
128 |
if (dashPattern == null) { |
|
1725
3be564c67d63
6751621: TextLayout.getBounds() doesn't account for strike through
prr
parents:
2
diff
changeset
|
129 |
return new BasicStroke(lineThickness, |
3be564c67d63
6751621: TextLayout.getBounds() doesn't account for strike through
prr
parents:
2
diff
changeset
|
130 |
BasicStroke.CAP_BUTT, |
3be564c67d63
6751621: TextLayout.getBounds() doesn't account for strike through
prr
parents:
2
diff
changeset
|
131 |
BasicStroke.JOIN_MITER); |
2 | 132 |
} |
133 |
else { |
|
134 |
return new BasicStroke(lineThickness, |
|
135 |
BasicStroke.CAP_BUTT, |
|
136 |
BasicStroke.JOIN_MITER, |
|
137 |
10.0f, |
|
138 |
dashPattern, |
|
139 |
0); |
|
140 |
} |
|
141 |
} |
|
142 |
||
143 |
private float getLineThickness(float thickness) { |
|
144 |
||
145 |
if (useThickness) { |
|
146 |
return thickness * thicknessMultiplier; |
|
147 |
} |
|
148 |
else { |
|
149 |
return DEFAULT_THICKNESS * thicknessMultiplier; |
|
150 |
} |
|
151 |
} |
|
152 |
||
153 |
private Stroke getStroke(float thickness) { |
|
154 |
||
155 |
float lineThickness = getLineThickness(thickness); |
|
156 |
BasicStroke stroke = cachedStroke; |
|
157 |
if (stroke == null || |
|
158 |
stroke.getLineWidth() != lineThickness) { |
|
159 |
||
160 |
stroke = createStroke(lineThickness); |
|
161 |
cachedStroke = stroke; |
|
162 |
} |
|
163 |
||
164 |
return stroke; |
|
165 |
} |
|
166 |
||
167 |
void drawUnderline(Graphics2D g2d, |
|
168 |
float thickness, |
|
169 |
float x1, |
|
170 |
float x2, |
|
171 |
float y) { |
|
172 |
||
173 |
||
174 |
Stroke saveStroke = g2d.getStroke(); |
|
175 |
g2d.setStroke(getStroke(thickness)); |
|
176 |
g2d.draw(new Line2D.Float(x1, y + shift, x2, y + shift)); |
|
177 |
g2d.setStroke(saveStroke); |
|
178 |
} |
|
179 |
||
180 |
float getLowerDrawLimit(float thickness) { |
|
181 |
||
182 |
return shift + getLineThickness(thickness); |
|
183 |
} |
|
184 |
||
185 |
Shape getUnderlineShape(float thickness, |
|
186 |
float x1, |
|
187 |
float x2, |
|
188 |
float y) { |
|
189 |
||
190 |
Stroke ulStroke = getStroke(thickness); |
|
191 |
Line2D line = new Line2D.Float(x1, y + shift, x2, y + shift); |
|
192 |
return ulStroke.createStrokedShape(line); |
|
193 |
} |
|
194 |
} |
|
195 |
||
196 |
// Implementation of UNDERLINE_LOW_GRAY. |
|
197 |
private static class IMGrayUnderline extends Underline { |
|
198 |
||
199 |
private BasicStroke stroke; |
|
200 |
||
201 |
IMGrayUnderline() { |
|
202 |
stroke = new BasicStroke(DEFAULT_THICKNESS, |
|
203 |
BasicStroke.CAP_BUTT, |
|
204 |
BasicStroke.JOIN_MITER, |
|
205 |
10.0f, |
|
206 |
new float[] {1, 1}, |
|
207 |
0); |
|
208 |
} |
|
209 |
||
210 |
void drawUnderline(Graphics2D g2d, |
|
211 |
float thickness, |
|
212 |
float x1, |
|
213 |
float x2, |
|
214 |
float y) { |
|
215 |
||
216 |
Stroke saveStroke = g2d.getStroke(); |
|
217 |
g2d.setStroke(stroke); |
|
218 |
||
219 |
Line2D.Float drawLine = new Line2D.Float(x1, y, x2, y); |
|
220 |
g2d.draw(drawLine); |
|
221 |
||
222 |
drawLine.y1 += DEFAULT_THICKNESS; |
|
223 |
drawLine.y2 += DEFAULT_THICKNESS; |
|
224 |
drawLine.x1 += DEFAULT_THICKNESS; |
|
225 |
||
226 |
g2d.draw(drawLine); |
|
227 |
||
228 |
g2d.setStroke(saveStroke); |
|
229 |
} |
|
230 |
||
231 |
float getLowerDrawLimit(float thickness) { |
|
232 |
||
233 |
return DEFAULT_THICKNESS * 2; |
|
234 |
} |
|
235 |
||
236 |
Shape getUnderlineShape(float thickness, |
|
237 |
float x1, |
|
238 |
float x2, |
|
239 |
float y) { |
|
240 |
||
241 |
GeneralPath gp = new GeneralPath(); |
|
242 |
||
243 |
Line2D.Float line = new Line2D.Float(x1, y, x2, y); |
|
244 |
gp.append(stroke.createStrokedShape(line), false); |
|
245 |
||
246 |
line.y1 += DEFAULT_THICKNESS; |
|
247 |
line.y2 += DEFAULT_THICKNESS; |
|
248 |
line.x1 += DEFAULT_THICKNESS; |
|
249 |
||
250 |
gp.append(stroke.createStrokedShape(line), false); |
|
251 |
||
252 |
return gp; |
|
253 |
} |
|
254 |
} |
|
255 |
||
256 |
// Keep a map of underlines, one for each type |
|
257 |
// of underline. The Underline objects are Flyweights |
|
258 |
// (shared across multiple clients), so they should be immutable. |
|
259 |
// If this implementation changes then clone underline |
|
260 |
// instances in getUnderline before returning them. |
|
261 |
private static final ConcurrentHashMap<Object, Underline> |
|
262 |
UNDERLINES = new ConcurrentHashMap<Object, Underline>(6); |
|
263 |
private static final Underline[] UNDERLINE_LIST; |
|
264 |
||
265 |
static { |
|
266 |
Underline[] uls = new Underline[6]; |
|
267 |
||
268 |
uls[0] = new StandardUnderline(0, 1, null, USE_THICKNESS); |
|
269 |
UNDERLINES.put(TextAttribute.UNDERLINE_ON, uls[0]); |
|
270 |
||
271 |
uls[1] = new StandardUnderline(1, 1, null, IGNORE_THICKNESS); |
|
272 |
UNDERLINES.put(TextAttribute.UNDERLINE_LOW_ONE_PIXEL, uls[1]); |
|
273 |
||
274 |
uls[2] = new StandardUnderline(1, 2, null, IGNORE_THICKNESS); |
|
275 |
UNDERLINES.put(TextAttribute.UNDERLINE_LOW_TWO_PIXEL, uls[2]); |
|
276 |
||
277 |
uls[3] = new StandardUnderline(1, 1, new float[] { 1, 1 }, IGNORE_THICKNESS); |
|
278 |
UNDERLINES.put(TextAttribute.UNDERLINE_LOW_DOTTED, uls[3]); |
|
279 |
||
280 |
uls[4] = new IMGrayUnderline(); |
|
281 |
UNDERLINES.put(TextAttribute.UNDERLINE_LOW_GRAY, uls[4]); |
|
282 |
||
283 |
uls[5] = new StandardUnderline(1, 1, new float[] { 4, 4 }, IGNORE_THICKNESS); |
|
284 |
UNDERLINES.put(TextAttribute.UNDERLINE_LOW_DASHED, uls[5]); |
|
285 |
||
286 |
UNDERLINE_LIST = uls; |
|
287 |
} |
|
288 |
||
289 |
/** |
|
290 |
* Return the Underline for the given value of |
|
291 |
* TextAttribute.INPUT_METHOD_UNDERLINE or |
|
292 |
* TextAttribute.UNDERLINE. |
|
293 |
* If value is not an input method underline value or |
|
294 |
* TextAttribute.UNDERLINE_ON, null is returned. |
|
295 |
*/ |
|
296 |
static Underline getUnderline(Object value) { |
|
297 |
||
298 |
if (value == null) { |
|
299 |
return null; |
|
300 |
} |
|
301 |
||
302 |
return (Underline) UNDERLINES.get(value); |
|
303 |
} |
|
304 |
||
305 |
static Underline getUnderline(int index) { |
|
306 |
return index < 0 ? null : UNDERLINE_LIST[index]; |
|
307 |
} |
|
308 |
} |