anchovy.gui.utils.textline source code

1 /**
2 Copyright: Copyright (c) 2013-2014 Andrey Penechko.
3 License: a$(WEB boost.org/LICENSE_1_0.txt, Boost License 1.0).
4 Authors: Andrey Penechko.
5 */
6 
7 module anchovy.gui.utils.textline;
8 
9 import anchovy.gui;
10 public import anchovy.graphics.texrectarray;
11 import anchovy.graphics.interfaces.irenderer;
12 import anchovy.graphics.font.fontmanager;
13 
14 class TextLine
15 {
16 
17 public:
18 
19 	this()
20 	{
21 		_text = "";
22 	}
23 
24 	void close()
25 	{
26 		_geometry.close();
27 	}
28 
29 	void font(Font newFont) @property
30 	{
31 		if (newFont is null) return;
32 		_font = newFont;
33 		if (!_isInited || newFont != _font)
34 			init();
35 	}
36 
37 	Font font() @property
38 	{
39 		return _font;
40 	}
41 
42 	bool isInited() @property
43 	{
44 		return _isInited;
45 	}
46 
47 	void update()
48 	{
49 		if (text.length == 0 || !_isInited) return;
50 		if (_isDirty)
51 		{
52 			_geometry.load;
53 			_isDirty = false;
54 		}
55 	}
56 
57 	uint width() @property
58 	{
59 		return _width;
60 	}
61 
62 	uint height() @property
63 	{
64 		return _height;
65 	}
66 
67 	ivec2 size() @property
68 	{
69 		return ivec2(_width, _height);
70 	}
71 
72 	TexRectArray geometry() @property
73 	{
74 		return _geometry;
75 	}
76 
77 	dstring text() @property
78 	{
79 		return _text;
80 	}
81 
82 	dstring text(in dstring newText) @property
83 	{
84 		if (_text == newText)
85 		{
86 			return _text;
87 		}
88 
89 		_text = newText;
90 		if (!_isInited) return _text;
91 
92 		_geometry.vertieces = null;
93 		_cursorX = 0;
94 
95 		appendGlyphs(_text, _font);
96 		_isDirty = true;
97 
98 		return _text;
99 	}
100 
101 	string fontName() @property
102 	{
103 		return _fontName;
104 	}
105 
106 	void fontName(string newFontName) @property
107 	{
108 		_fontName = newFontName;
109 	}
110 
111 	///Supports chaining
112 	TextLine append(in string text)
113 	{
114 		return append(to!dstring(text));
115 	}
116 
117 	TextLine append(in dstring text)
118 	{
119 		appendGlyphs(_text, _font);
120 		_isDirty = true;
121 		return this;
122 	}
123 
124 protected:
125 
126 	void init()
127 	{
128 		_geometry = new TexRectArray;
129 		_height = _font.size;
130 		appendGlyphs(_text, _font);
131 		_isInited = true;
132 	}
133 
134 	void appendGlyphs(in dstring text, Font font)
135 	{
136 		foreach(dchar chr; text)
137 		{
138 			Glyph* glyph = font.getGlyph(chr);
139 			if (glyph !is null && chr == '\t')
140 			{
141 				_cursorX += glyph.metrics.advanceX * _tabSize;
142 				continue;
143 			}
144 			if (glyph is null) glyph = font.getGlyph('?');
145 
146 			int x  =  glyph.metrics.offsetX + _cursorX;
147 			int y  =  font.verticalOffset - glyph.metrics.offsetY;
148 			int w  =  glyph.metrics.width;
149 			int h  =  glyph.metrics.height;
150 			int tx =  glyph.atlasPosition.x;
151 			int ty =  glyph.atlasPosition.y;
152 
153 			//whitespace
154 			if (w == 0 || h == 0)
155 			{
156 				_cursorX += glyph.metrics.advanceX;
157 				continue;
158 			}
159 
160 			_geometry.appendQuad(Rect(x, y, w, h), Rect(tx, ty, w, h));
161 			_cursorX += glyph.metrics.advanceX;
162 		}
163 
164 		_width = _cursorX;
165 	}
166 
167 protected:
168 	uint _width;
169 	uint _height;
170 	dstring _text;
171 	bool _isInited = false;
172 
173 	TexRectArray _geometry;
174 	uint _cursorX;
175 	bool _isDirty = true;
176 
177 	Font _font;
178 	string _fontName;
179 
180 	ubyte _tabSize = 4;
181 }