src/sp-glyph.cpp

   1 #ifdef HAVE_CONFIG_H
   2 # include <config.h>
   3 #endif
   4
   5 #ifdef ENABLE_SVG_FONTS
   6 #define __SP_GLYPH_C__
   7
   8 /*
   9  * SVG <glyph> element implementation
  10  *
  11  * Author:
  12  *   Felipe C. da S. Sanches <juca@members.fsf.org>
  13  *   Abhishek Sharma
  14  *
  15  * Copyright (C) 2008, Felipe C. da S. Sanches
  16  *
  17  * Released under GNU GPL, read the file 'COPYING' for more information
  18  */
  19
  20 #include "xml/repr.h"
  21 #include "attributes.h"
  22 #include "sp-glyph.h"
  23 #include "document.h"
  24
  25 static void sp_glyph_class_init(SPGlyphClass *gc);
  26 static void sp_glyph_init(SPGlyph *glyph);
  27
  28 static void sp_glyph_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  29 static void sp_glyph_release(SPObject *object);
  30 static void sp_glyph_set(SPObject *object, unsigned int key, const gchar *value);
  31 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
  32 static void sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags);
  33
  34 static SPObjectClass *parent_class;
  35
  36 GType sp_glyph_get_type(void)
  37 {
  38     static GType type = 0;
  39
  40     if (!type) {
  41         GTypeInfo info = {
  42             sizeof(SPGlyphClass),
  43             NULL,       /* base_init */
  44             NULL,       /* base_finalize */
  45             (GClassInitFunc) sp_glyph_class_init,
  46             NULL,       /* class_finalize */
  47             NULL,       /* class_data */
  48             sizeof(SPGlyph),
  49             16, /* n_preallocs */
  50             (GInstanceInitFunc) sp_glyph_init,
  51             NULL,       /* value_table */
  52         };
  53         type = g_type_register_static(SP_TYPE_OBJECT, "SPGlyph", &info, (GTypeFlags) 0);
  54     }
  55
  56     return type;
  57 }
  58
  59 static void sp_glyph_class_init(SPGlyphClass *gc)
  60 {
  61     SPObjectClass *sp_object_class = (SPObjectClass *) gc;
  62
  63     parent_class = (SPObjectClass*)g_type_class_peek_parent(gc);
  64
  65     sp_object_class->build = sp_glyph_build;
  66     sp_object_class->release = sp_glyph_release;
  67     sp_object_class->set = sp_glyph_set;
  68     sp_object_class->write = sp_glyph_write;
  69     sp_object_class->update = sp_glyph_update;
  70 }
  71
  72 static void sp_glyph_init(SPGlyph *glyph)
  73 {
  74 //TODO: correct these values:
  75
  76     new (&glyph->unicode) Glib::ustring();
  77     new (&glyph->glyph_name) Glib::ustring();
  78     glyph->d = NULL;
  79     glyph->orientation = GLYPH_ORIENTATION_BOTH;
  80     glyph->arabic_form = GLYPH_ARABIC_FORM_INITIAL;
  81     glyph->lang = NULL;
  82     glyph->horiz_adv_x = 0;
  83     glyph->vert_origin_x = 0;
  84     glyph->vert_origin_y = 0;
  85     glyph->vert_adv_y = 0;
  86 }
  87
  88 static void sp_glyph_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  89 {
  90     if (((SPObjectClass *) (parent_class))->build) {
  91         ((SPObjectClass *) (parent_class))->build(object, document, repr);
  92     }
  93
  94     object->readAttr( "unicode" );
  95     object->readAttr( "glyph-name" );
  96     object->readAttr( "d" );
  97     object->readAttr( "orientation" );
  98     object->readAttr( "arabic-form" );
  99     object->readAttr( "lang" );
 100     object->readAttr( "horiz-adv-x" );
 101     object->readAttr( "vert-origin-x" );
 102     object->readAttr( "vert-origin-y" );
 103     object->readAttr( "vert-adv-y" );
 104 }
 105
 106 static void sp_glyph_release(SPObject *object)
 107 {
 108     //SPGlyph *glyph = SP_GLYPH(object);
 109
 110     if (((SPObjectClass *) parent_class)->release) {
 111         ((SPObjectClass *) parent_class)->release(object);
 112     }
 113 }
 114
 115 static glyphArabicForm sp_glyph_read_arabic_form(gchar const *value){
 116     if (!value) return GLYPH_ARABIC_FORM_INITIAL; //TODO: verify which is the default default (for me, the spec is not clear)
 117     switch(value[0]){
 118         case 'i':
 119             if (strncmp(value, "initial", 7) == 0) return GLYPH_ARABIC_FORM_INITIAL;
 120             if (strncmp(value, "isolated", 8) == 0) return GLYPH_ARABIC_FORM_ISOLATED;
 121             break;
 122         case 'm':
 123             if (strncmp(value, "medial", 6) == 0) return GLYPH_ARABIC_FORM_MEDIAL;
 124             break;
 125         case 't':
 126             if (strncmp(value, "terminal", 8) == 0) return GLYPH_ARABIC_FORM_TERMINAL;
 127             break;
 128     }
 129     return GLYPH_ARABIC_FORM_INITIAL; //TODO: VERIFY DEFAULT!
 130 }
 131
 132 static glyphOrientation sp_glyph_read_orientation(gchar const *value){
 133     if (!value) return GLYPH_ORIENTATION_BOTH;
 134     switch(value[0]){
 135         case 'h':
 136             return GLYPH_ORIENTATION_HORIZONTAL;
 137             break;
 138         case 'v':
 139             return GLYPH_ORIENTATION_VERTICAL;
 140             break;
 141     }
 142 //ERROR? TODO: VERIFY PROPER ERROR HANDLING
 143     return GLYPH_ORIENTATION_BOTH;
 144 }
 145
 146 static void sp_glyph_set(SPObject *object, unsigned int key, const gchar *value)
 147 {
 148     SPGlyph *glyph = SP_GLYPH(object);
 149
 150     switch (key) {
 151         case SP_ATTR_UNICODE:
 152         {
 153             glyph->unicode.clear();
 154             if (value) glyph->unicode.append(value);
 155             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 156             break;
 157         }
 158         case SP_ATTR_GLYPH_NAME:
 159         {
 160             glyph->glyph_name.clear();
 161             if (value) glyph->glyph_name.append(value);
 162             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 163             break;
 164         }
 165         case SP_ATTR_D:
 166         {
 167             if (glyph->d) g_free(glyph->d);
 168             glyph->d = g_strdup(value);
 169             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 170             break;
 171         }
 172         case SP_ATTR_ORIENTATION:
 173         {
 174             glyphOrientation orient = sp_glyph_read_orientation(value);
 175             if (glyph->orientation != orient){
 176                 glyph->orientation = orient;
 177                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 178             }
 179             break;
 180         }
 181         case SP_ATTR_ARABIC_FORM:
 182         {
 183             glyphArabicForm form = sp_glyph_read_arabic_form(value);
 184             if (glyph->arabic_form != form){
 185                 glyph->arabic_form = form;
 186                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 187             }
 188             break;
 189         }
 190         case SP_ATTR_LANG:
 191         {
 192             if (glyph->lang) g_free(glyph->lang);
 193             glyph->lang = g_strdup(value);
 194             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 195             break;
 196         }
 197         case SP_ATTR_HORIZ_ADV_X:
 198         {
 199             double number = value ? g_ascii_strtod(value, 0) : 0;
 200             if (number != glyph->horiz_adv_x){
 201                 glyph->horiz_adv_x = number;
 202                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 203             }
 204             break;
 205         }
 206         case SP_ATTR_VERT_ORIGIN_X:
 207         {
 208             double number = value ? g_ascii_strtod(value, 0) : 0;
 209             if (number != glyph->vert_origin_x){
 210                 glyph->vert_origin_x = number;
 211                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 212             }
 213             break;
 214         }
 215         case SP_ATTR_VERT_ORIGIN_Y:
 216         {
 217             double number = value ? g_ascii_strtod(value, 0) : 0;
 218             if (number != glyph->vert_origin_y){
 219                 glyph->vert_origin_y = number;
 220                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 221             }
 222             break;
 223         }
 224         case SP_ATTR_VERT_ADV_Y:
 225         {
 226             double number = value ? g_ascii_strtod(value, 0) : 0;
 227             if (number != glyph->vert_adv_y){
 228                 glyph->vert_adv_y = number;
 229                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 230             }
 231             break;
 232         }
 233         default:
 234         {
 235             if (((SPObjectClass *) (parent_class))->set) {
 236                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 237             }
 238             break;
 239         }
 240     }
 241 }
 242
 243 /**
 244  *  * Receives update notifications.
 245  *   */
 246 static void
 247 sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags)
 248 {
 249     SPGlyph *glyph = SP_GLYPH(object);
 250     (void)glyph;
 251
 252     if (flags & SP_OBJECT_MODIFIED_FLAG) {
 253         /* do something to trigger redisplay, updates? */
 254             object->readAttr( "unicode" );
 255             object->readAttr( "glyph-name" );
 256             object->readAttr( "d" );
 257             object->readAttr( "orientation" );
 258             object->readAttr( "arabic-form" );
 259             object->readAttr( "lang" );
 260             object->readAttr( "horiz-adv-x" );
 261             object->readAttr( "vert-origin-x" );
 262             object->readAttr( "vert-origin-y" );
 263             object->readAttr( "vert-adv-y" );
 264     }
 265
 266     if (((SPObjectClass *) parent_class)->update) {
 267         ((SPObjectClass *) parent_class)->update(object, ctx, flags);
 268     }
 269 }
 270
 271 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
 272
 273 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
 274 {
 275 //    SPGlyph *glyph = SP_GLYPH(object);
 276
 277     if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 278         repr = xml_doc->createElement("svg:glyph");
 279     }
 280
 281 /* I am commenting out this part because I am not certain how does it work. I will have to study it later. Juca
 282     repr->setAttribute("unicode", glyph->unicode);
 283     repr->setAttribute("glyph-name", glyph->glyph_name);
 284     repr->setAttribute("d", glyph->d);
 285     sp_repr_set_svg_double(repr, "orientation", (double) glyph->orientation);
 286     sp_repr_set_svg_double(repr, "arabic-form", (double) glyph->arabic_form);
 287     repr->setAttribute("lang", glyph->lang);
 288     sp_repr_set_svg_double(repr, "horiz-adv-x", glyph->horiz_adv_x);
 289     sp_repr_set_svg_double(repr, "vert-origin-x", glyph->vert_origin_x);
 290     sp_repr_set_svg_double(repr, "vert-origin-y", glyph->vert_origin_y);
 291     sp_repr_set_svg_double(repr, "vert-adv-y", glyph->vert_adv_y);
 292 */
 293     if (repr != SP_OBJECT_REPR(object)) {
 294         // All the COPY_ATTR functions below use
 295         //   XML Tree directly while they shouldn't.
 296         COPY_ATTR(repr, object->getRepr(), "unicode");
 297         COPY_ATTR(repr, object->getRepr(), "glyph-name");
 298         COPY_ATTR(repr, object->getRepr(), "d");
 299         COPY_ATTR(repr, object->getRepr(), "orientation");
 300         COPY_ATTR(repr, object->getRepr(), "arabic-form");
 301         COPY_ATTR(repr, object->getRepr(), "lang");
 302         COPY_ATTR(repr, object->getRepr(), "horiz-adv-x");
 303         COPY_ATTR(repr, object->getRepr(), "vert-origin-x");
 304         COPY_ATTR(repr, object->getRepr(), "vert-origin-y");
 305         COPY_ATTR(repr, object->getRepr(), "vert-adv-y");
 306     }
 307
 308     if (((SPObjectClass *) (parent_class))->write) {
 309         ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
 310     }
 311
 312     return repr;
 313 }
 314 #endif //#ifdef ENABLE_SVG_FONTS
 315 /*
 316   Local Variables:
 317   mode:c++
 318   c-file-style:"stroustrup"
 319   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 320   indent-tabs-mode:nil
 321   fill-column:99
 322   End:
 323 */
 324 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :