src/sp-glyph.cpp

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