# File lib/rvg/misc.rb, line 82
82:                 def initialize(context)
83:                     @ctx = context
84:                     @ctx.shadow.affine = @ctx.text_attrs.affine
85:                 end

     # File lib/rvg/misc.rb, line 87
 87:                 def enquote(text)
 88:                     if text.length > 2 && /\A(?:\"[^\"]+\"|\'[^\']+\'|\{[^\}]+\})\z/.match(text)
 89:                         return text
 90:                     elsif !text['\'']
 91:                         text = '\''+text+'\''
 92:                         return text
 93:                     elsif !text['"']
 94:                         text = '"'+text+'"'
 95:                         return text
 96:                     elsif !(text['{'] || text['}'])
 97:                         text = '{'+text+'}'
 98:                         return text
 99:                     end
100: 
101:                     # escape existing braces, surround with braces
102:                     text.gsub!(/[}]/) { |b| '\\' + b }
103:                     return '{' +  text + '}'
104:                 end

     # File lib/rvg/misc.rb, line 106
106:                 def glyph_metrics(glyph_orientation, glyph)
107:                     glyph_metrics = @ctx.shadow.get_type_metrics(glyph)
108:                     h = glyph_metrics.ascent - glyph_metrics.descent
109:                     w = glyph_metrics.width
110:                     if glyph_orientation == 0 || glyph_orientation == 180
111:                         [w, h]
112:                     else
113:                         [h, w]
114:                     end
115:                 end

     # File lib/rvg/misc.rb, line 161
161:                 def render_glyph(glyph_orientation, x, y, glyph)
162:                     if glyph_orientation == 0
163:                         @ctx.gc.text(x, y, enquote(glyph))
164:                     else
165:                         @ctx.gc.push
166:                         @ctx.gc.translate(x, y)
167:                         @ctx.gc.rotate(glyph_orientation)
168:                         @ctx.gc.translate(-x, -y)
169:                         @ctx.gc.text(x, y, enquote(glyph))
170:                         @ctx.gc.pop
171:                     end
172:                 end

     # File lib/rvg/misc.rb, line 138
138:                 def shift_baseline(glyph_orientation, glyph)
139:                     glyph_dimensions = @ctx.shadow.get_type_metrics(glyph)
140:                     if glyph_orientation == 0 || glyph_orientation == 180
141:                         x = glyph_dimensions.width
142:                     else
143:                         x = glyph_dimensions.ascent - glyph_dimensions.descent
144:                     end
145:                     case @ctx.text_attrs.baseline_shift
146:                         when :baseline
147:                             x = 0
148:                         when :sub
149:                             ;
150:                         when :super
151:                             x = -x
152:                         when /[-+]?(\d+)%/
153:                             m = $1 == '-' ? -1.0 : 1.0
154:                             x = (m * x * $1.to_f / 100.0)
155:                         else
156:                             x = -@ctx.text_attrs.baseline_shift
157:                     end
158:                     return x
159:                 end

     # File lib/rvg/misc.rb, line 117
117:                 def text_rel_coords(text)
118:                     y_rel_coords = []
119:                     x_rel_coords = []
120:                     first_word = true
121:                     words = text.split(::Magick::RVG::WORD_SEP)
122:                     words.each do |word|
123:                         unless first_word
124:                             wx, wy = get_word_spacing()
125:                             x_rel_coords << wx
126:                             y_rel_coords << wy
127:                         end
128:                         first_word = false
129:                         word.split('').each do |glyph|
130:                             wx, wy = get_letter_spacing(glyph)
131:                             x_rel_coords << wx
132:                             y_rel_coords << wy
133:                         end
134:                     end
135:                     [x_rel_coords, y_rel_coords]
136:                 end