src/sp-glyph.cpp

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