+ start = newline+1;
+ }
+}
+
+unsigned Text::count_characters(unsigned start, unsigned bytes) const
+{
+ StringCodec::Utf8::Decoder dec;
+ string::const_iterator i = text.begin()+start;
+ string::const_iterator end = i+bytes;
+ unsigned count = 0;
+ for(; i<end; dec.decode_char(text, i))
+ ++count;
+ return count;
+}
+
+void Text::check_alignment(unsigned offs) const
+{
+ StringCodec::Utf8::Decoder dec;
+ string::const_iterator i = text.begin()+offs;
+ dec.decode_char(text, i);
+}
+
+template<typename T>
+void Text::process_lines(const Part &part, const Geometry &parent, unsigned first_row, void (Text::*func)(unsigned, const Geometry &, T &) const, T &data) const
+{
+ if(!style)
+ return;
+
+ const GL::Font &font = style->get_font();
+ float font_size = style->get_font_size();
+ unsigned line_spacing = static_cast<unsigned>(font_size*6/5);
+ int y_offset = static_cast<int>(-font.get_descent()*font_size);
+
+ unsigned fit_height;
+ unsigned n_lines = get_visible_lines(part, parent, &fit_height);
+ first_row = min<unsigned>(first_row, lines.size()-n_lines);
+
+ for(unsigned i=0; i<n_lines; ++i)
+ {
+ const Line &line = lines[first_row+i];
+
+ Geometry rgeom;
+ rgeom.w = line.width;
+ rgeom.h = fit_height;
+ rgeom.y = (n_lines-1-i)*line_spacing+y_offset;
+ part.get_alignment().apply(rgeom, parent, part.get_margin());
+
+ (this->*func)(first_row+i, rgeom, data);
+ }
+}
+
+void Text::build_line(unsigned i, const Geometry &rgeom, RenderData &data) const
+{
+ const Line &line = lines[i];
+
+ GL::VertexBuilder::PushMatrix _pushm(*data.bld);
+ data.bld->transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
+ data.bld->transform(GL::Matrix::scaling(style->get_font_size()));
+
+ style->get_font().build_string(text.substr(line.start, line.bytes), *data.bld);
+}
+
+void Text::coords_to_geom_line(unsigned i, const Geometry &rgeom, CoordsToGeomData &data) const
+{
+ if(i==data.row)
+ {
+ string::const_iterator begin = text.begin()+lines[i].start;
+ string::const_iterator j = begin;
+ if(lines[i].length==lines[i].bytes)
+ j += data.col;
+ else
+ {
+ StringCodec::Utf8::Decoder dec;
+ for(unsigned c=data.col; c; --c)
+ dec.decode_char(text, j);
+ }
+ float w = style->get_font().get_string_width(string(begin, j));
+ data.result = rgeom;
+ data.result.x += static_cast<unsigned>(w*style->get_font_size());