File: PQCharacterView.m

package info (click to toggle)
fontmanager.app 0.1-1
  • links: PTS
  • area: main
  • in suites: buster
  • size: 568 kB
  • ctags: 13
  • sloc: objc: 1,618; makefile: 19
file content (210 lines) | stat: -rw-r--r-- 5,125 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
 * PQCharacterView.m - Font Manager
 *
 * Copyright 2007 Isaiah Beerbower.
 *
 * Author: Isaiah Beerbower
 * Created: 12/01/07
 * License: 3-Clause BSD license (see file COPYING)
 */


#ifdef GNUSTEP
#import <GNUstepGUI/GSTheme.h>
#endif
#import <stdlib.h>
#import <math.h>
#import "PQCharacterView.h"
#import "PQCompat.h"


#define invf(f) ((f > 0.0) ? (f - (f * 2.0)) : fabs(f))


@implementation PQCharacterView

- (id) initWithFrame: (NSRect)frame
{
	[super initWithFrame: frame];

	fontName = [[NSFont userFontOfSize: 144.0] fontName];
	fontSize = 144.0;
	
	color = [NSColor blackColor];
	guideColor = [NSColor redColor];
	backgroundColor = [NSColor whiteColor];
	
	character = 0;
	
	RETAIN(fontName);
	RETAIN(color);
	RETAIN(guideColor);
	RETAIN(backgroundColor);

	return self;
}

- (void) dealloc
{
	RELEASE(fontName);
	RELEASE(color);
	RELEASE(guideColor);
	RELEASE(backgroundColor);
	
	[super dealloc];
}

- (void) setFontSize: (float)newSize
{
	fontSize = newSize;
	
	[self setNeedsDisplay: YES];
}

- (float) fontSize
{
	return fontSize;
}

- (void) setFont: (NSString *)newFontName
{
	ASSIGN(fontName, newFontName);
	
	[self setNeedsDisplay: YES];
}

- (NSString *) font
{
	return fontName;
}

- (void) setCharacter: (unichar)newCharacter
{
	character = newCharacter;
	
	[self setNeedsDisplay: YES];
}

- (unichar) character
{
	return character;
}


/* Drawing */

- (void) drawRect: (NSRect)rect
{
	NSFont *font = [NSFont fontWithName: [self font] size: [self fontSize]];
	NSBezierPath *path = [[NSBezierPath alloc] init];
	
#ifndef GNUSTEP
	NSCharacterSet *fontCharacterSet = [font coveredCharacterSet];
#endif
	
	/* Text system components */
	NSTextStorage *textStorage;
	NSLayoutManager *layoutManager;

	/* Set up text system */
	textStorage = [[NSTextStorage alloc] initWithString:
		[NSString stringWithCharacters: &character length: 1]];
	[textStorage addAttribute: NSFontAttributeName
											value: font
											range: NSMakeRange(0, [textStorage length])];
	[textStorage addAttribute: NSForegroundColorAttributeName
											value: color
											range: NSMakeRange(0, [textStorage length])];
	layoutManager = [[NSLayoutManager alloc] init];
	[textStorage addLayoutManager: layoutManager];
	RELEASE(layoutManager); /* Retained by textStorage */
	
	[backgroundColor set];
	[NSBezierPath fillRect: rect];

	float advancement =
		[font advancementForGlyph: [layoutManager glyphAtIndex: 0]].width;

#ifndef GNUSTEP
	if ([layoutManager numberOfGlyphs] > 0 && advancement > 0.0 &&
	    [fontCharacterSet characterIsMember: character])
#else
	if ([layoutManager numberOfGlyphs] > 0 && advancement > 0.0)
#endif
	{
		float ascent = [font ascender];
		float descent = [font descender];
		float xHeight = [font xHeight];
		float italicAngle = [font italicAngle];
		float yOffset = (rect.size.height - [textStorage size].height) / 2.0;
    float baseline = yOffset + abs(descent);
		float xOffset = NSMidX(rect) - (advancement / 2.0);
				
    [guideColor set];

		[path moveToPoint: NSMakePoint(0.0, baseline)];
		[path lineToPoint: NSMakePoint(rect.size.width, baseline)];

		[path stroke];

		[path removeAllPoints];

		float pattern[] = {1.0, 2.0};
		[path setLineDash: pattern count: 2 phase: 0.0];

		[path moveToPoint: NSMakePoint(xOffset, 0.0)];
		[path lineToPoint: NSMakePoint(xOffset, rect.size.height)];

		[path moveToPoint: NSMakePoint(xOffset + advancement, 0.0)];
		[path lineToPoint: NSMakePoint(xOffset + advancement,
		                               rect.size.height)];

		[path moveToPoint: NSMakePoint(0.0, baseline + descent)];
		[path lineToPoint: NSMakePoint(rect.size.width, baseline + descent)];

		[path moveToPoint: NSMakePoint(0.0, baseline + ascent)];
		[path lineToPoint: NSMakePoint(rect.size.width, baseline + ascent)];

		[path moveToPoint: NSMakePoint(0.0, baseline + xHeight)];
		[path lineToPoint: NSMakePoint(rect.size.width, baseline + xHeight)];

		// NOTE: Mac OS X version 10.3 seems to return a bogus italic angle.
		if (italicAngle != 0.0)
		{
			float top = ([self frame].size.height / 2.0);
			float bottom = ([self frame].size.height / 2.0);
			float tangent = tan(invf(italicAngle) * (3.141592 / 180.0));

			[path moveToPoint:
				NSMakePoint(xOffset + (tangent * top),
										[self frame].size.height)];
			[path lineToPoint:
				NSMakePoint(xOffset - (tangent * bottom), 0.0)];

			[path moveToPoint:
				NSMakePoint(xOffset + advancement + (tangent * top),
										[self frame].size.height)];
			[path lineToPoint:
				NSMakePoint((xOffset + advancement) - (tangent * bottom), 0.0)];
		}

		[path stroke];

		[textStorage drawAtPoint: NSMakePoint(xOffset, yOffset)];       
	}
	
#ifdef GNUSTEP
	[[GSTheme theme] drawGrayBezel: NSMakeRect(0.0, 0.0,
	                                           [self frame].size.width,
																						 [self frame].size.height)
												withClip: rect];
#else
	[[NSColor lightGrayColor] set];
	[NSBezierPath strokeRect:NSInsetRect(NSMakeRect(0.0, 0.0,
																									[self frame].size.width,
																									[self frame].size.height),
																			 0.5, 0.5)];
#endif
}

@end