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 <felipe.sanches@gmail.com>
  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     glyph->unicode = NULL;
  76     glyph->glyph_name = NULL;
  77     glyph->d = NULL;
  78     glyph->orientation = GLYPH_ORIENTATION_BOTH;
  79     glyph->arabic_form = GLYPH_ARABIC_FORM_INITIAL;
  80     glyph->lang = NULL;
  81     glyph->horiz_adv_x = 0;
  82     glyph->vert_origin_x = 0;
  83     glyph->vert_origin_y = 0;
  84     glyph->vert_adv_y = 0;
  85 }
  86
  87 static void sp_glyph_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  88 {
  89     if (((SPObjectClass *) (parent_class))->build) {
  90         ((SPObjectClass *) (parent_class))->build(object, document, repr);
  91     }
  92
  93     sp_object_read_attr(object, "unicode");
  94     sp_object_read_attr(object, "glyph-name");
  95     sp_object_read_attr(object, "d");
  96     sp_object_read_attr(object, "orientation");
  97     sp_object_read_attr(object, "arabic-form");
  98     sp_object_read_attr(object, "lang");
  99     sp_object_read_attr(object, "horiz-adv-x");
 100     sp_object_read_attr(object, "vert-origin-x");
 101     sp_object_read_attr(object, "vert-origin-y");
 102     sp_object_read_attr(object, "vert-adv-y");
 103 }
 104
 105 static void sp_glyph_release(SPObject *object)
 106 {
 107     //SPGlyph *glyph = SP_GLYPH(object);
 108
 109     if (((SPObjectClass *) parent_class)->release) {
 110         ((SPObjectClass *) parent_class)->release(object);
 111     }
 112 }
 113
 114 static glyphArabicForm sp_glyph_read_arabic_form(gchar const *value){
 115     if (!value) return GLYPH_ARABIC_FORM_INITIAL; //TODO: verify which is the default default (for me, the spec is not clear)
 116     switch(value[0]){
 117         case 'i':
 118             if (strncmp(value, "initial", 7) == 0) return GLYPH_ARABIC_FORM_INITIAL;
 119             if (strncmp(value, "isolated", 8) == 0) return GLYPH_ARABIC_FORM_ISOLATED;
 120             break;
 121         case 'm':
 122             if (strncmp(value, "medial", 6) == 0) return GLYPH_ARABIC_FORM_MEDIAL;
 123             break;
 124         case 't':
 125             if (strncmp(value, "terminal", 8) == 0) return GLYPH_ARABIC_FORM_TERMINAL;
 126             break;
 127     }
 128     return GLYPH_ARABIC_FORM_INITIAL; //TODO: VERIFY DEFAULT!
 129 }
 130
 131 static glyphOrientation sp_glyph_read_orientation(gchar const *value){
 132     if (!value) return GLYPH_ORIENTATION_BOTH;
 133     switch(value[0]){
 134         case 'h':
 135             return GLYPH_ORIENTATION_HORIZONTAL;
 136             break;
 137         case 'v':
 138             return GLYPH_ORIENTATION_VERTICAL;
 139             break;
 140     }
 141 //ERROR? TODO: VERIFY PROPER ERROR HANDLING
 142     return GLYPH_ORIENTATION_BOTH;
 143 }
 144
 145 static void sp_glyph_set(SPObject *object, unsigned int key, const gchar *value)
 146 {
 147     SPGlyph *glyph = SP_GLYPH(object);
 148     double number;
 149     glyphOrientation orient;
 150     glyphArabicForm form;
 151
 152     switch (key) {
 153         case SP_ATTR_UNICODE:
 154             if (glyph->unicode) g_free(glyph->unicode);
 155             glyph->unicode = g_strdup(value);
 156             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 157 g_warning("<glyph>: SP_ATTR_UNICODE: %s", value);
 158              break;
 159         case SP_ATTR_GLYPH_NAME:
 160             if (glyph->glyph_name) g_free(glyph->glyph_name);
 161             glyph->glyph_name = g_strdup(value);
 162             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 163 g_warning("<glyph>: SP_ATTR_GLYPH_NAME: %s", value);
 164              break;
 165         case SP_ATTR_D:
 166             if (glyph->d) g_free(glyph->d);
 167             glyph->d = g_strdup(value);
 168             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 169 g_warning("<glyph>: SP_ATTR_D: %s", value);
 170             break;
 171         case SP_ATTR_ORIENTATION:
 172             orient = sp_glyph_read_orientation(value);
 173             if (glyph->orientation != orient){
 174                 glyph->orientation = orient;
 175                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 176             }
 177 g_warning("<glyph>: SP_ATTR_ORIENTATION: %d", orient);
 178             break;
 179         case SP_ATTR_ARABIC_FORM:
 180             form = sp_glyph_read_arabic_form(value);
 181             if (glyph->arabic_form != form){
 182                 glyph->arabic_form = form;
 183                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 184             }
 185 g_warning("<glyph>: SP_ATTR_ARABIC_FORM: %d", glyph->arabic_form);
 186             break;
 187         case SP_ATTR_LANG:
 188             if (glyph->lang) g_free(glyph->lang);
 189             glyph->lang = g_strdup(value);
 190 g_warning("<glyph>: SP_ATTR_LANG: %s", value);
 191             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 192             break;
 193         case SP_ATTR_HORIZ_ADV_X:
 194             number = helperfns_read_number(value);
 195             if (number != glyph->horiz_adv_x){
 196                 glyph->horiz_adv_x = number;
 197 g_warning("<glyph>: SP_ATTR_HORIZ_ADV_X: %f", number);
 198                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 199             }
 200             break;
 201         case SP_ATTR_VERT_ORIGIN_X:
 202             number = helperfns_read_number(value);
 203             if (number != glyph->vert_origin_x){
 204                 glyph->vert_origin_x = number;
 205 g_warning("<glyph>: SP_ATTR_VERT_ORIGIN_X: %f", number);
 206                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 207             }
 208             break;
 209         case SP_ATTR_VERT_ORIGIN_Y:
 210             number = helperfns_read_number(value);
 211             if (number != glyph->vert_origin_y){
 212                 glyph->vert_origin_y = number;
 213 g_warning("<glyph>: SP_ATTR_VERT_ORIGIN_Y: %f", number);
 214                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 215             }
 216             break;
 217         case SP_ATTR_VERT_ADV_Y:
 218             number = helperfns_read_number(value);
 219             if (number != glyph->vert_adv_y){
 220                 glyph->vert_adv_y = number;
 221 g_warning("<glyph>: SP_ATTR_VERT_ADV_Y: %f", number);
 222                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 223             }
 224             break;
 225         default:
 226             if (((SPObjectClass *) (parent_class))->set) {
 227                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 228             }
 229             break;
 230     }
 231 }
 232
 233 /**
 234  *  * Receives update notifications.
 235  *   */
 236 static void
 237 sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags)
 238 {
 239     SPGlyph *glyph = SP_GLYPH(object);
 240     (void)glyph;
 241
 242     if (flags & SP_OBJECT_MODIFIED_FLAG) {
 243         /* do something to trigger redisplay, updates? */
 244             sp_object_read_attr(object, "unicode");
 245             sp_object_read_attr(object, "glyph-name");
 246             sp_object_read_attr(object, "d");
 247             sp_object_read_attr(object, "orientation");
 248             sp_object_read_attr(object, "arabic-form");
 249             sp_object_read_attr(object, "lang");
 250             sp_object_read_attr(object, "horiz-adv-x");
 251             sp_object_read_attr(object, "vert-origin-x");
 252             sp_object_read_attr(object, "vert-origin-y");
 253             sp_object_read_attr(object, "vert-adv-y");
 254     }
 255
 256     if (((SPObjectClass *) parent_class)->update) {
 257         ((SPObjectClass *) parent_class)->update(object, ctx, flags);
 258     }
 259 }
 260
 261 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
 262
 263 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
 264 {
 265 //    SPGlyph *glyph = SP_GLYPH(object);
 266
 267     if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 268         repr = xml_doc->createElement("svg:glyph");
 269     }
 270
 271 /* I am commenting out this part because I am not certain how does it work. I will have to study it later. Juca
 272     repr->setAttribute("unicode", glyph->unicode);
 273     repr->setAttribute("glyph-name", glyph->glyph_name);
 274     repr->setAttribute("d", glyph->d);
 275     sp_repr_set_svg_double(repr, "orientation", (double) glyph->orientation);
 276     sp_repr_set_svg_double(repr, "arabic-form", (double) glyph->arabic_form);
 277     repr->setAttribute("lang", glyph->lang);
 278     sp_repr_set_svg_double(repr, "horiz-adv-x", glyph->horiz_adv_x);
 279     sp_repr_set_svg_double(repr, "vert-origin-x", glyph->vert_origin_x);
 280     sp_repr_set_svg_double(repr, "vert-origin-y", glyph->vert_origin_y);
 281     sp_repr_set_svg_double(repr, "vert-adv-y", glyph->vert_adv_y);
 282 */
 283     if (repr != SP_OBJECT_REPR(object)) {
 284         COPY_ATTR(repr, object->repr, "unicode");
 285         COPY_ATTR(repr, object->repr, "glyph-name");
 286         COPY_ATTR(repr, object->repr, "d");
 287         COPY_ATTR(repr, object->repr, "orientation");
 288         COPY_ATTR(repr, object->repr, "arabic-form");
 289         COPY_ATTR(repr, object->repr, "lang");
 290         COPY_ATTR(repr, object->repr, "horiz-adv-x");
 291         COPY_ATTR(repr, object->repr, "vert-origin-x");
 292         COPY_ATTR(repr, object->repr, "vert-origin-y");
 293         COPY_ATTR(repr, object->repr, "vert-adv-y");
 294     }
 295
 296     if (((SPObjectClass *) (parent_class))->write) {
 297         ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
 298     }
 299
 300     return repr;
 301 }
 302 #endif //#ifdef ENABLE_SVG_FONTS
 303 /*
 304   Local Variables:
 305   mode:c++
 306   c-file-style:"stroustrup"
 307   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 308   indent-tabs-mode:nil
 309   fill-column:99
 310   End:
 311 */
 312 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :