1 #include <msp/gl/immediate.h>
2 #include <msp/gl/matrix.h>
3 #include <msp/gl/texture2d.h>
12 struct Text::RenderData
14 GL::PrimitiveBuilder *bld;
17 struct Text::CoordsToGeomData
29 Text::Text(const Style &s, const string &t):
35 void Text::set_style(const Style *s)
41 const GL::Font &font = style->get_font();
42 float font_size = style->get_font_size();
43 for(vector<Line>::iterator i=lines.begin(); i!=lines.end(); ++i)
44 i->width = static_cast<unsigned>(font.get_string_width(text.substr(i->start, i->length))*font_size);
48 unsigned Text::get_width() const
51 for(vector<Line>::const_iterator i=lines.begin(); i!=lines.end(); ++i)
52 width = max(width, i->width);
56 unsigned Text::get_height() const
61 const GL::Font &font = style->get_font();
62 float font_size = style->get_font_size();
63 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font_size);
64 unsigned line_spacing = line_height*6/5;
65 return line_height+(lines.size()-1)*line_spacing;
68 void Text::set(const string &t)
74 void Text::erase(unsigned pos, unsigned len)
78 vector<Line>::iterator i;
79 for(i=lines.begin(); (i!=lines.end() && i->start+i->length<pos); ++i) ;
81 if(pos+len>i->start+i->length)
87 for(++i; i!=lines.end(); ++i)
92 void Text::insert(unsigned pos, const string &s)
96 if(s.find('\n')!=string::npos)
100 vector<Line>::iterator i;
101 for(i=lines.begin(); (i!=lines.end() && i->start+i->length<pos); ++i) ;
103 i->length += s.size();
105 for(++i; i!=lines.end(); ++i)
106 i->start += s.size();
110 unsigned Text::get_line_length(unsigned i) const
113 throw out_of_range("Text::get_line_length");
114 return lines[i].length;
117 void Text::offset_to_coords(unsigned offs, unsigned &row, unsigned &col) const
126 for(unsigned i=0; i<lines.size(); ++i)
127 if(offs>=lines[i].start && offs<=lines[i].start+lines[i].length)
130 col = offs-lines[i].start;
135 unsigned Text::coords_to_offset(unsigned row, unsigned col) const
137 if(row>=lines.size())
140 return lines[row].start+min(col, lines[row].length);
143 Geometry Text::coords_to_geometry(const Part &part, const Geometry &parent, unsigned first_row, unsigned row, unsigned col) const
145 if(row>=lines.size())
146 row = lines.size()-1;
147 const Line &line = lines[row];
151 CoordsToGeomData data;
155 process_lines<CoordsToGeomData, &Text::coords_to_geom_line>(part, parent, first_row, data);
160 void Text::render(const Part &part, const Geometry &parent, unsigned first_row) const
162 if(!style || lines.empty())
165 const GL::Font &font = style->get_font();
166 const GL::Color &color = style->get_font_color();
167 GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
168 imm.color(color.r, color.g, color.b);
173 GL::Bind bind_tex(font.get_texture());
175 process_lines<RenderData, &Text::render_line>(part, parent, first_row, data);
178 Text &Text::operator=(const string &t)
184 void Text::find_lines()
187 float font_size = (style ? style->get_font_size() : 1);
188 string::size_type start = 0;
191 string::size_type newline = text.find('\n', start);
195 line.length = (newline==string::npos ? text.size() : newline)-start;
196 line.width = line.length;
199 string str = text.substr(line.start, line.length);
200 line.width = static_cast<unsigned>(style->get_font().get_string_width(str)*font_size);
202 lines.push_back(line);
204 if(newline==string::npos)
210 template<typename T, void (Text::*func)(unsigned, const Geometry &, T &) const>
211 void Text::process_lines(const Part &part, const Geometry &parent, unsigned first_row, T &data) const
216 const GL::Font &font = style->get_font();
217 float font_size = style->get_font_size();
218 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*font_size);
219 unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
220 unsigned height = line_height+(lines.size()-1)*line_spacing;
221 int y_offset = static_cast<int>(-font.get_descent()*font_size);
223 const Sides &margin = part.get_margin();
224 unsigned n_lines = min(lines.size(), max((parent.h-margin.top-margin.bottom)/line_spacing, 1U));
225 first_row = min(first_row, lines.size()-n_lines);
227 for(unsigned i=0; i<n_lines; ++i)
229 const Line &line = lines[first_row+i];
232 rgeom.w = line.width;
234 rgeom.y = (n_lines-1-i)*line_spacing+y_offset;
235 part.get_alignment().apply(rgeom, parent, part.get_margin());
237 (this->*func)(first_row+i, rgeom, data);
241 void Text::render_line(unsigned i, const Geometry &rgeom, RenderData &data) const
243 const Line &line = lines[i];
245 GL::PushMatrix _pushm;
246 GL::translate(rgeom.x, rgeom.y, 0);
247 GL::scale_uniform(style->get_font_size());
249 style->get_font().build_string(text.substr(line.start, line.length), *data.bld);
252 void Text::coords_to_geom_line(unsigned i, const Geometry &rgeom, CoordsToGeomData &data) const
256 float w = style->get_font().get_string_width(text.substr(lines[i].start, data.col));
258 data.result.x += static_cast<unsigned>(w*style->get_font_size());