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