src/sp-glyph.cpp

   1 #define __SP_GLYPH_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 static void sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags);
  28
  29 static SPObjectClass *parent_class;
  30
  31 GType sp_glyph_get_type(void)
  32 {
  33     static GType type = 0;
  34
  35     if (!type) {
  36         GTypeInfo info = {
  37             sizeof(SPGlyphClass),
  38             NULL,       /* base_init */
  39             NULL,       /* base_finalize */
  40             (GClassInitFunc) sp_glyph_class_init,
  41             NULL,       /* class_finalize */
  42             NULL,       /* class_data */
  43             sizeof(SPGlyph),
  44             16, /* n_preallocs */
  45             (GInstanceInitFunc) sp_glyph_init,
  46             NULL,       /* value_table */
  47         };
  48         type = g_type_register_static(SP_TYPE_OBJECT, "SPGlyph", &info, (GTypeFlags) 0);
  49     }
  50
  51     return type;
  52 }
  53
  54 static void sp_glyph_class_init(SPGlyphClass *gc)
  55 {
  56     SPObjectClass *sp_object_class = (SPObjectClass *) gc;
  57
  58     parent_class = (SPObjectClass*)g_type_class_peek_parent(gc);
  59
  60     sp_object_class->build = sp_glyph_build;
  61     sp_object_class->release = sp_glyph_release;
  62     sp_object_class->set = sp_glyph_set;
  63     sp_object_class->write = sp_glyph_write;
  64     sp_object_class->update = sp_glyph_update;
  65 }
  66
  67 static void sp_glyph_init(SPGlyph *glyph)
  68 {
  69 //TODO: correct these values:
  70     glyph->unicode = NULL;
  71     glyph->glyph_name = NULL;
  72     glyph->d = NULL;
  73     glyph->orientation = GLYPH_ORIENTATION_BOTH;
  74     glyph->arabic_form = GLYPH_ARABIC_FORM_INITIAL;
  75     glyph->lang = NULL;
  76     glyph->horiz_adv_x = 0;
  77     glyph->vert_origin_x = 0;
  78     glyph->vert_origin_y = 0;
  79     glyph->vert_adv_y = 0;
  80 }
  81
  82 static void sp_glyph_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  83 {
  84     if (((SPObjectClass *) (parent_class))->build) {
  85         ((SPObjectClass *) (parent_class))->build(object, document, repr);
  86     }
  87
  88     sp_object_read_attr(object, "unicode");
  89     sp_object_read_attr(object, "glyph-name");
  90     sp_object_read_attr(object, "d");
  91     sp_object_read_attr(object, "orientation");
  92     sp_object_read_attr(object, "arabic-form");
  93     sp_object_read_attr(object, "lang");
  94     sp_object_read_attr(object, "horiz-adv-x");
  95     sp_object_read_attr(object, "vert-origin-x");
  96     sp_object_read_attr(object, "vert-origin-y");
  97     sp_object_read_attr(object, "vert-adv-y");
  98 }
  99
 100 static void sp_glyph_release(SPObject *object)
 101 {
 102     //SPGlyph *glyph = SP_GLYPH(object);
 103
 104     if (((SPObjectClass *) parent_class)->release) {
 105         ((SPObjectClass *) parent_class)->release(object);
 106     }
 107 }
 108
 109 static glyphArabicForm sp_glyph_read_arabic_form(gchar const *value){
 110     if (!value) return GLYPH_ARABIC_FORM_INITIAL; //TODO: verify which is the default default (for me, the spec is not clear)
 111     switch(value[0]){
 112         case 'i':
 113             if (strncmp(value, "initial", 7) == 0) return GLYPH_ARABIC_FORM_INITIAL;
 114             if (strncmp(value, "isolated", 8) == 0) return GLYPH_ARABIC_FORM_ISOLATED;
 115             break;
 116         case 'm':
 117             if (strncmp(value, "medial", 6) == 0) return GLYPH_ARABIC_FORM_MEDIAL;
 118             break;
 119         case 't':
 120             if (strncmp(value, "terminal", 8) == 0) return GLYPH_ARABIC_FORM_TERMINAL;
 121             break;
 122     }
 123     return GLYPH_ARABIC_FORM_INITIAL; //TODO: VERIFY DEFAULT!
 124 }
 125
 126 static glyphOrientation sp_glyph_read_orientation(gchar const *value){
 127     if (!value) return GLYPH_ORIENTATION_BOTH;
 128     switch(value[0]){
 129         case 'h':
 130             return GLYPH_ORIENTATION_HORIZONTAL;
 131             break;
 132         case 'v':
 133             return GLYPH_ORIENTATION_VERTICAL;
 134             break;
 135     }
 136 //ERROR? TODO: VERIFY PROPER ERROR HANDLING
 137     return GLYPH_ORIENTATION_BOTH;
 138 }
 139
 140 static void sp_glyph_set(SPObject *object, unsigned int key, const gchar *value)
 141 {
 142     SPGlyph *glyph = SP_GLYPH(object);
 143     double number;
 144     glyphOrientation orient;
 145     glyphArabicForm form;
 146
 147     switch (key) {
 148         case SP_ATTR_UNICODE:
 149             if (glyph->unicode) g_free(glyph->unicode);
 150             glyph->unicode = g_strdup(value);
 151             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 152 g_warning("<glyph>: SP_ATTR_UNICODE: %s", value);
 153              break;
 154         case SP_ATTR_GLYPH_NAME:
 155             if (glyph->glyph_name) g_free(glyph->glyph_name);
 156             glyph->glyph_name = g_strdup(value);
 157             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 158 g_warning("<glyph>: SP_ATTR_GLYPH_NAME: %s", value);
 159              break;
 160         case SP_ATTR_D:
 161             if (glyph->d) g_free(glyph->d);
 162             glyph->d = g_strdup(value);
 163             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 164 g_warning("<glyph>: SP_ATTR_D: %s", value);
 165             break;
 166         case SP_ATTR_ORIENTATION:
 167             orient = sp_glyph_read_orientation(value);
 168             if (glyph->orientation != orient){
 169                 glyph->orientation = orient;
 170                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 171             }
 172 g_warning("<glyph>: SP_ATTR_ORIENTATION: %d", orient);
 173             break;
 174         case SP_ATTR_ARABIC_FORM:
 175             form = sp_glyph_read_arabic_form(value);
 176             if (glyph->arabic_form != form){
 177                 glyph->arabic_form = form;
 178                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 179             }
 180 g_warning("<glyph>: SP_ATTR_ARABIC_FORM: %d", glyph->arabic_form);
 181             break;
 182         case SP_ATTR_LANG:
 183             if (glyph->lang) g_free(glyph->lang);
 184             glyph->lang = g_strdup(value);
 185 g_warning("<glyph>: SP_ATTR_LANG: %s", 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 g_warning("<glyph>: SP_ATTR_HORIZ_ADV_X: %f", number);
 193                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 194             }
 195             break;
 196         case SP_ATTR_VERT_ORIGIN_X:
 197             number = helperfns_read_number(value);
 198             if (number != glyph->vert_origin_x){
 199                 glyph->vert_origin_x = number;
 200 g_warning("<glyph>: SP_ATTR_VERT_ORIGIN_X: %f", number);
 201                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 202             }
 203             break;
 204         case SP_ATTR_VERT_ORIGIN_Y:
 205             number = helperfns_read_number(value);
 206             if (number != glyph->vert_origin_y){
 207                 glyph->vert_origin_y = number;
 208 g_warning("<glyph>: SP_ATTR_VERT_ORIGIN_Y: %f", number);
 209                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 210             }
 211             break;
 212         case SP_ATTR_VERT_ADV_Y:
 213             number = helperfns_read_number(value);
 214             if (number != glyph->vert_adv_y){
 215                 glyph->vert_adv_y = number;
 216 g_warning("<glyph>: SP_ATTR_VERT_ADV_Y: %f", number);
 217                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 218             }
 219             break;
 220         default:
 221             if (((SPObjectClass *) (parent_class))->set) {
 222                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 223             }
 224             break;
 225     }
 226 }
 227
 228 /**
 229  *  * Receives update notifications.
 230  *   */
 231 static void
 232 sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags)
 233 {
 234     SPGlyph *glyph = SP_GLYPH(object);
 235     (void)glyph;
 236
 237     if (flags & SP_OBJECT_MODIFIED_FLAG) {
 238         /* do something to trigger redisplay, updates? */
 239             sp_object_read_attr(object, "unicode");
 240             sp_object_read_attr(object, "glyph-name");
 241             sp_object_read_attr(object, "d");
 242             sp_object_read_attr(object, "orientation");
 243             sp_object_read_attr(object, "arabic-form");
 244             sp_object_read_attr(object, "lang");
 245             sp_object_read_attr(object, "horiz-adv-x");
 246             sp_object_read_attr(object, "vert-origin-x");
 247             sp_object_read_attr(object, "vert-origin-y");
 248             sp_object_read_attr(object, "vert-adv-y");
 249     }
 250
 251     if (((SPObjectClass *) parent_class)->update) {
 252         ((SPObjectClass *) parent_class)->update(object, ctx, flags);
 253     }
 254 }
 255
 256 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
 257
 258 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 259 {
 260 //    SPGlyph *glyph = SP_GLYPH(object);
 261
 262     if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 263         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
 264         repr = xml_doc->createElement("svg:glyph");
 265     }
 266
 267 /* I am commenting out this part because I am not certain how does it work. I will have to study it later. Juca
 268     repr->setAttribute("unicode", glyph->unicode);
 269     repr->setAttribute("glyph-name", glyph->glyph_name);
 270     repr->setAttribute("d", glyph->d);
 271     sp_repr_set_svg_double(repr, "orientation", (double) glyph->orientation);
 272     sp_repr_set_svg_double(repr, "arabic-form", (double) glyph->arabic_form);
 273     repr->setAttribute("lang", glyph->lang);
 274     sp_repr_set_svg_double(repr, "horiz-adv-x", glyph->horiz_adv_x);
 275     sp_repr_set_svg_double(repr, "vert-origin-x", glyph->vert_origin_x);
 276     sp_repr_set_svg_double(repr, "vert-origin-y", glyph->vert_origin_y);
 277     sp_repr_set_svg_double(repr, "vert-adv-y", glyph->vert_adv_y);
 278 */
 279     if (repr != SP_OBJECT_REPR(object)) {
 280         COPY_ATTR(repr, object->repr, "unicode");
 281         COPY_ATTR(repr, object->repr, "glyph-name");
 282         COPY_ATTR(repr, object->repr, "d");
 283         COPY_ATTR(repr, object->repr, "orientation");
 284         COPY_ATTR(repr, object->repr, "arabic-form");
 285         COPY_ATTR(repr, object->repr, "lang");
 286         COPY_ATTR(repr, object->repr, "horiz-adv-x");
 287         COPY_ATTR(repr, object->repr, "vert-origin-x");
 288         COPY_ATTR(repr, object->repr, "vert-origin-y");
 289         COPY_ATTR(repr, object->repr, "vert-adv-y");
 290     }
 291
 292     if (((SPObjectClass *) (parent_class))->write) {
 293         ((SPObjectClass *) (parent_class))->write(object, repr, flags);
 294     }
 295
 296     return repr;
 297 }
 298
 299 /*
 300   Local Variables:
 301   mode:c++
 302   c-file-style:"stroustrup"
 303   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 304   indent-tabs-mode:nil
 305   fill-column:99
 306   End:
 307 */
 308 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :