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KerningTools.vala in libbirdfont

This file is a part of the Birdfont project.

Contributing

Send patches or pull requests to johan.mattsson.m@gmail.com.
Clone this repository: git clone https://github.com/johanmattssonm/birdfont.git
Add *nix as OS tag heads/master
1 /* 2 Copyright (C) 2013 2014 2015 Johan Mattsson 3 4 This library is free software; you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 3 of the 7 License, or (at your option) any later version. 8 9 This library is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 */ 14 15 using Cairo; 16 using Math; 17 18 namespace BirdFont { 19 20 public class KerningTools : ToolCollection { 21 public static Gee.ArrayList<Expander> expanders; 22 public static int next_class = 0; 23 public static Expander classes; 24 25 public static double font_size = 1; 26 public static ZoomBar zoom_bar; 27 28 public static Tool previous_kerning_string; 29 public static Tool next_kerning_string; 30 31 public static Expander otf_features; 32 33 static OtfTags active_otf_features; 34 35 public KerningTools () { 36 selected (); 37 } 38 39 public override void selected () { 40 init (); 41 } 42 43 public static OtfTags get_otf_tags () { 44 if (is_null (active_otf_features)) { 45 return new OtfTags (); 46 } 47 48 return active_otf_features; 49 } 50 51 public static void init () { 52 Font font = BirdFont.get_current_font (); 53 54 active_otf_features = new OtfTags (); 55 56 Expander kerning_tools = new Expander (t_("Kerning Tools")); 57 58 if (is_null (classes)) { 59 classes = new Expander (); 60 update_kerning_classes (); 61 } 62 63 expanders = new Gee.ArrayList<Expander> (); 64 65 Expander font_name = new Expander (); 66 font_name.add_tool (new FontName ()); 67 68 Expander zoom_expander = new Expander (t_("Font Size")); 69 70 zoom_bar = new ZoomBar (); 71 zoom_bar.new_zoom.connect ((z) => { 72 Font f; 73 74 font_size = 3 * z; 75 76 if (font_size < 0.1) { 77 font_size = 0.1; 78 } 79 80 f = BirdFont.get_current_font (); 81 f.settings.set_setting ("kerning_zoom", @"$z"); 82 83 GlyphCanvas.redraw (); 84 }); 85 zoom_expander.add_tool (zoom_bar); 86 87 Tool new_kerning_class = new Tool ("kerning_class", t_("Create new kerning class.")); 88 new_kerning_class.select_action.connect ((self) => { 89 Font f = BirdFont.get_current_font (); 90 string label = t_("Kerning class"); 91 KerningRange kr = new KerningRange (f, @"$label $(++next_class)"); 92 classes.add_tool (kr); 93 self.set_selected (false); 94 classes.clear_cache (); 95 classes.redraw (); 96 }); 97 kerning_tools.add_tool (new_kerning_class); 98 99 Tool text_kerning = new Tool ("kerning_text_input", t_("Use text input to enter kerning values.")); 100 text_kerning.select_action.connect ((self) => { 101 KerningDisplay d = MainWindow.get_kerning_display (); 102 d.set_kerning_by_text (); 103 self.set_selected (false); 104 }); 105 kerning_tools.add_tool (text_kerning); 106 107 Tool insert_last = new Tool ("insert_glyph_from_overview", t_("Insert glyph from overview")); 108 insert_last.select_action.connect ((self) => { 109 KerningDisplay d = MainWindow.get_kerning_display (); 110 GlyphSelection gs = new GlyphSelection (); 111 112 gs.selected_glyph.connect ((gc) => { 113 d.inser_glyph (gc.get_current ()); 114 MainWindow.get_tab_bar ().select_tab_name ("Kerning"); 115 }); 116 117 GlyphCanvas.set_display (gs); 118 self.set_selected (false); 119 }); 120 kerning_tools.add_tool (insert_last); 121 122 Tool insert_unicode = new Tool ("insert_unichar", t_("Insert character by unicode value")); 123 insert_unicode.select_action.connect ((self) => { 124 KerningDisplay d = MainWindow.get_kerning_display (); 125 d.insert_unichar (); 126 self.set_selected (false); 127 }); 128 kerning_tools.add_tool (insert_unicode); 129 130 Tool right_to_left = new Tool ("right_to_left", t_("Right to left")); 131 right_to_left.select_action.connect ((self) => { 132 KerningDisplay.right_to_left = !KerningDisplay.right_to_left; 133 right_to_left.set_selected (KerningDisplay.right_to_left); 134 GlyphCanvas.redraw (); 135 }); 136 kerning_tools.add_tool (right_to_left); 137 138 string empty_kerning_text = t_("Open a text file with kerning strings first."); 139 140 previous_kerning_string = new Tool ("previous_kerning_string", t_("Previous kerning string")); 141 previous_kerning_string.select_action.connect ((self) => { 142 FontDisplay fd = MainWindow.get_current_display (); 143 KerningDisplay d = (KerningDisplay) fd; 144 Font f = BirdFont.get_current_font (); 145 string w = f.kerning_strings.previous (); 146 147 if (f.kerning_strings.is_empty ()) { 148 MainWindow.show_message (empty_kerning_text); 149 } else if (w == "") { 150 MainWindow.show_message (t_("You have reached the beginning of the list.")); 151 } else { 152 d.new_line (); 153 d.add_text (w); 154 } 155 self.set_selected (false); 156 }); 157 kerning_tools.add_tool (previous_kerning_string); 158 159 next_kerning_string = new Tool ("next_kerning_string", t_("Next kerning string")); 160 next_kerning_string.select_action.connect ((self) => { 161 FontDisplay fd = MainWindow.get_current_display (); 162 KerningDisplay d = (KerningDisplay) fd; 163 Font f = BirdFont.get_current_font (); 164 string w = f.kerning_strings.next (); 165 166 if (f.kerning_strings.is_empty ()) { 167 MainWindow.show_message (empty_kerning_text); 168 } else if (w == "") { 169 MainWindow.show_message (t_("You have reached the end of the list.")); 170 } else { 171 d.new_line (); 172 d.add_text (w); 173 } 174 self.set_selected (false); 175 }); 176 kerning_tools.add_tool (next_kerning_string); 177 178 otf_features = new Expander (t_("Substitutions")); 179 180 foreach (string tag in font.alternates.get_all_tags ()) { 181 add_otf_label (tag); 182 } 183 184 kerning_tools.set_persistent (false); 185 kerning_tools.set_unique (false); 186 187 classes.set_persistent (true); 188 classes.set_unique (true); 189 190 expanders.add (font_name); 191 expanders.add (zoom_expander); 192 expanders.add (kerning_tools); 193 expanders.add (otf_features); 194 expanders.add (classes); 195 } 196 197 public static void add_otf_label (string tag) { 198 OtfLabel otf_label = new OtfLabel (tag); 199 FontSettings fs = BirdFont.get_current_font ().settings; 200 201 otf_features.add_tool (otf_label); 202 otf_label.otf_feature_activity.connect ((enable, tag) => { 203 OtfTags tags = active_otf_features.copy (); 204 KerningDisplay kd = MainWindow.get_kerning_display (); 205 kd.new_segment (); 206 207 // create a new feature set in order to keep the features 208 // for other parts of the text in kerning tab 209 active_otf_features = tags; 210 211 if (enable) { 212 tags.add (tag); 213 fs.set_setting (@"kerning_$(tag)", "true"); 214 } else { 215 tags.remove (tag); 216 fs.set_setting (@"kerning_$(tag)", "false"); 217 } 218 219 kd.get_last_segment ().set_otf_tags (tags); 220 221 GlyphCanvas.redraw (); 222 }); 223 224 bool enable = fs.get_setting (@"kerning_$(tag)") == "true"; 225 otf_label.set_selected_tag (enable); 226 } 227 228 public static void add_unique_class (KerningRange kerning_class) { 229 KerningRange k; 230 231 if (is_null (classes)) { // FIXME: export without tools 232 init (); 233 } 234 235 foreach (Tool t in classes.tool) { 236 if (!(t is KerningRange)) { 237 warning ("Tool is not kerning range"); 238 return; 239 } 240 241 k = (KerningRange) t; 242 if (k.glyph_range.get_all_ranges () == kerning_class.glyph_range.get_all_ranges ()) { 243 return; 244 } 245 } 246 247 classes.add_tool (kerning_class); 248 } 249 250 public static GlyphRange get_kerning_class (int index) { 251 if (likely (0 <= index < classes.tool.size)) { 252 return ((KerningRange) classes.tool.get (index)).glyph_range; 253 } else { 254 warning ("Index out of bounds."); 255 return new GlyphRange (); 256 } 257 } 258 259 public static void update_kerning_classes () { 260 Font font = BirdFont.get_current_font (); 261 KerningClasses k = font.get_kerning_classes (); 262 KerningRange kr; 263 GlyphRange r; 264 int i; 265 266 remove_all_kerning_classes (); 267 268 for (i = 0; i < k.classes_first.size; i++) { 269 r = k.classes_first.get (i); 270 if (r.is_class ()) { 271 kr = new KerningRange (font); 272 kr.set_ranges (r.get_all_ranges ()); 273 add_unique_class (kr); 274 } 275 276 r = k.classes_last.get (i); 277 if (r.is_class ()) { 278 kr = new KerningRange (font); 279 kr.set_ranges (r.get_all_ranges ()); 280 add_unique_class (kr); 281 } 282 } 283 284 classes.clear_cache (); 285 classes.redraw (); 286 } 287 288 private static void remove_all_kerning_classes () { 289 if (is_null (classes)) { // FIXME: export without tools 290 init (); 291 } 292 293 classes.tool.clear (); 294 295 if (!is_null (MainWindow.get_toolbox ())) { 296 MainWindow.get_toolbox ().update_expanders (); 297 } 298 } 299 300 public static void remove_empty_classes () { 301 KerningRange kr; 302 int i; 303 304 if (classes.tool.size == 0) { 305 return; 306 } 307 308 i = 0; 309 foreach (Tool t in classes.tool) { 310 return_if_fail (t is KerningRange); 311 312 kr = (KerningRange) t; 313 if (kr.glyph_range.is_empty ()) { 314 classes.tool.remove_at (i); 315 remove_empty_classes (); 316 Toolbox.redraw_tool_box (); 317 return; 318 } 319 320 i++; 321 } 322 } 323 324 public override Gee.ArrayList<Expander> get_expanders () { 325 return expanders; 326 } 327 328 public static void update_spacing_classes () { 329 KerningRange kr; 330 331 if (classes.tool.size == 0) { 332 return; 333 } 334 335 foreach (Tool t in classes.tool) { 336 return_if_fail (t is KerningRange); 337 338 kr = (KerningRange) t; 339 kr.update_spacing_class (); 340 } 341 } 342 343 public override Gee.ArrayList<string> get_displays () { 344 Gee.ArrayList<string> d = new Gee.ArrayList<string> (); 345 d.add ("Kerning"); 346 d.add ("Spacing"); 347 return d; 348 } 349 350 } 351 352 } 353