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  *
  14  * Copyright (C) 2008, Felipe C. da S. Sanches
  15  *
  16  * Released under GNU GPL, read the file 'COPYING' for more information
  17  */
  18
  19 #include "xml/repr.h"
  20 #include "attributes.h"
  21 #include "sp-glyph.h"
  22 #include "document.h"
  23 #include "helper-fns.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     sp_object_read_attr(object, "unicode");
  95     sp_object_read_attr(object, "glyph-name");
  96     sp_object_read_attr(object, "d");
  97     sp_object_read_attr(object, "orientation");
  98     sp_object_read_attr(object, "arabic-form");
  99     sp_object_read_attr(object, "lang");
 100     sp_object_read_attr(object, "horiz-adv-x");
 101     sp_object_read_attr(object, "vert-origin-x");
 102     sp_object_read_attr(object, "vert-origin-y");
 103     sp_object_read_attr(object, "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     double number;
 150     glyphOrientation orient;
 151     glyphArabicForm form;
 152
 153     switch (key) {
 154         case SP_ATTR_UNICODE:
 155             glyph->unicode.clear();
 156             if (value) glyph->unicode.append(value);
 157             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 158             break;
 159         case SP_ATTR_GLYPH_NAME:
 160             glyph->glyph_name.clear();
 161             if (value) glyph->glyph_name.append(value);
 162             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 163             break;
 164         case SP_ATTR_D:
 165             if (glyph->d) g_free(glyph->d);
 166             glyph->d = g_strdup(value);
 167             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 168             break;
 169         case SP_ATTR_ORIENTATION:
 170             orient = sp_glyph_read_orientation(value);
 171             if (glyph->orientation != orient){
 172                 glyph->orientation = orient;
 173                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 174             }
 175             break;
 176         case SP_ATTR_ARABIC_FORM:
 177             form = sp_glyph_read_arabic_form(value);
 178             if (glyph->arabic_form != form){
 179                 glyph->arabic_form = form;
 180                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 181             }
 182             break;
 183         case SP_ATTR_LANG:
 184             if (glyph->lang) g_free(glyph->lang);
 185             glyph->lang = g_strdup(value);
 186             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 187             break;
 188         case SP_ATTR_HORIZ_ADV_X:
 189             number = helperfns_read_number(value);
 190             if (number != glyph->horiz_adv_x){
 191                 glyph->horiz_adv_x = number;
 192                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 193             }
 194             break;
 195         case SP_ATTR_VERT_ORIGIN_X:
 196             number = helperfns_read_number(value);
 197             if (number != glyph->vert_origin_x){
 198                 glyph->vert_origin_x = number;
 199                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 200             }
 201             break;
 202         case SP_ATTR_VERT_ORIGIN_Y:
 203             number = helperfns_read_number(value);
 204             if (number != glyph->vert_origin_y){
 205                 glyph->vert_origin_y = number;
 206                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 207             }
 208             break;
 209         case SP_ATTR_VERT_ADV_Y:
 210             number = helperfns_read_number(value);
 211             if (number != glyph->vert_adv_y){
 212                 glyph->vert_adv_y = number;
 213                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 214             }
 215             break;
 216         default:
 217             if (((SPObjectClass *) (parent_class))->set) {
 218                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 219             }
 220             break;
 221     }
 222 }
 223
 224 /**
 225  *  * Receives update notifications.
 226  *   */
 227 static void
 228 sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags)
 229 {
 230     SPGlyph *glyph = SP_GLYPH(object);
 231     (void)glyph;
 232
 233     if (flags & SP_OBJECT_MODIFIED_FLAG) {
 234         /* do something to trigger redisplay, updates? */
 235             sp_object_read_attr(object, "unicode");
 236             sp_object_read_attr(object, "glyph-name");
 237             sp_object_read_attr(object, "d");
 238             sp_object_read_attr(object, "orientation");
 239             sp_object_read_attr(object, "arabic-form");
 240             sp_object_read_attr(object, "lang");
 241             sp_object_read_attr(object, "horiz-adv-x");
 242             sp_object_read_attr(object, "vert-origin-x");
 243             sp_object_read_attr(object, "vert-origin-y");
 244             sp_object_read_attr(object, "vert-adv-y");
 245     }
 246
 247     if (((SPObjectClass *) parent_class)->update) {
 248         ((SPObjectClass *) parent_class)->update(object, ctx, flags);
 249     }
 250 }
 251
 252 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
 253
 254 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
 255 {
 256 //    SPGlyph *glyph = SP_GLYPH(object);
 257
 258     if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 259         repr = xml_doc->createElement("svg:glyph");
 260     }
 261
 262 /* I am commenting out this part because I am not certain how does it work. I will have to study it later. Juca
 263     repr->setAttribute("unicode", glyph->unicode);
 264     repr->setAttribute("glyph-name", glyph->glyph_name);
 265     repr->setAttribute("d", glyph->d);
 266     sp_repr_set_svg_double(repr, "orientation", (double) glyph->orientation);
 267     sp_repr_set_svg_double(repr, "arabic-form", (double) glyph->arabic_form);
 268     repr->setAttribute("lang", glyph->lang);
 269     sp_repr_set_svg_double(repr, "horiz-adv-x", glyph->horiz_adv_x);
 270     sp_repr_set_svg_double(repr, "vert-origin-x", glyph->vert_origin_x);
 271     sp_repr_set_svg_double(repr, "vert-origin-y", glyph->vert_origin_y);
 272     sp_repr_set_svg_double(repr, "vert-adv-y", glyph->vert_adv_y);
 273 */
 274     if (repr != SP_OBJECT_REPR(object)) {
 275         COPY_ATTR(repr, object->repr, "unicode");
 276         COPY_ATTR(repr, object->repr, "glyph-name");
 277         COPY_ATTR(repr, object->repr, "d");
 278         COPY_ATTR(repr, object->repr, "orientation");
 279         COPY_ATTR(repr, object->repr, "arabic-form");
 280         COPY_ATTR(repr, object->repr, "lang");
 281         COPY_ATTR(repr, object->repr, "horiz-adv-x");
 282         COPY_ATTR(repr, object->repr, "vert-origin-x");
 283         COPY_ATTR(repr, object->repr, "vert-origin-y");
 284         COPY_ATTR(repr, object->repr, "vert-adv-y");
 285     }
 286
 287     if (((SPObjectClass *) (parent_class))->write) {
 288         ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
 289     }
 290
 291     return repr;
 292 }
 293 #endif //#ifdef ENABLE_SVG_FONTS
 294 /*
 295   Local Variables:
 296   mode:c++
 297   c-file-style:"stroustrup"
 298   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 299   indent-tabs-mode:nil
 300   fill-column:99
 301   End:
 302 */
 303 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :