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 <juca@members.fsf.org>
  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
  24 static void sp_glyph_class_init(SPGlyphClass *gc);
  25 static void sp_glyph_init(SPGlyph *glyph);
  26
  27 static void sp_glyph_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  28 static void sp_glyph_release(SPObject *object);
  29 static void sp_glyph_set(SPObject *object, unsigned int key, const gchar *value);
  30 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
  31 static void sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags);
  32
  33 static SPObjectClass *parent_class;
  34
  35 GType sp_glyph_get_type(void)
  36 {
  37     static GType type = 0;
  38
  39     if (!type) {
  40         GTypeInfo info = {
  41             sizeof(SPGlyphClass),
  42             NULL,       /* base_init */
  43             NULL,       /* base_finalize */
  44             (GClassInitFunc) sp_glyph_class_init,
  45             NULL,       /* class_finalize */
  46             NULL,       /* class_data */
  47             sizeof(SPGlyph),
  48             16, /* n_preallocs */
  49             (GInstanceInitFunc) sp_glyph_init,
  50             NULL,       /* value_table */
  51         };
  52         type = g_type_register_static(SP_TYPE_OBJECT, "SPGlyph", &info, (GTypeFlags) 0);
  53     }
  54
  55     return type;
  56 }
  57
  58 static void sp_glyph_class_init(SPGlyphClass *gc)
  59 {
  60     SPObjectClass *sp_object_class = (SPObjectClass *) gc;
  61
  62     parent_class = (SPObjectClass*)g_type_class_peek_parent(gc);
  63
  64     sp_object_class->build = sp_glyph_build;
  65     sp_object_class->release = sp_glyph_release;
  66     sp_object_class->set = sp_glyph_set;
  67     sp_object_class->write = sp_glyph_write;
  68     sp_object_class->update = sp_glyph_update;
  69 }
  70
  71 static void sp_glyph_init(SPGlyph *glyph)
  72 {
  73 //TODO: correct these values:
  74
  75     new (&glyph->unicode) Glib::ustring();
  76     new (&glyph->glyph_name) Glib::ustring();
  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     object->readAttr( "unicode");
  94     object->readAttr( "glyph-name");
  95     object->readAttr( "d");
  96     object->readAttr( "orientation");
  97     object->readAttr( "arabic-form");
  98     object->readAttr( "lang");
  99     object->readAttr( "horiz-adv-x");
 100     object->readAttr( "vert-origin-x");
 101     object->readAttr( "vert-origin-y");
 102     object->readAttr( "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
 149     switch (key) {
 150         case SP_ATTR_UNICODE:
 151         {
 152             glyph->unicode.clear();
 153             if (value) glyph->unicode.append(value);
 154             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 155             break;
 156         }
 157         case SP_ATTR_GLYPH_NAME:
 158         {
 159             glyph->glyph_name.clear();
 160             if (value) glyph->glyph_name.append(value);
 161             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 162             break;
 163         }
 164         case SP_ATTR_D:
 165         {
 166             if (glyph->d) g_free(glyph->d);
 167             glyph->d = g_strdup(value);
 168             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 169             break;
 170         }
 171         case SP_ATTR_ORIENTATION:
 172         {
 173             glyphOrientation orient = sp_glyph_read_orientation(value);
 174             if (glyph->orientation != orient){
 175                 glyph->orientation = orient;
 176                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 177             }
 178             break;
 179         }
 180         case SP_ATTR_ARABIC_FORM:
 181         {
 182             glyphArabicForm form = sp_glyph_read_arabic_form(value);
 183             if (glyph->arabic_form != form){
 184                 glyph->arabic_form = form;
 185                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 186             }
 187             break;
 188         }
 189         case SP_ATTR_LANG:
 190         {
 191             if (glyph->lang) g_free(glyph->lang);
 192             glyph->lang = g_strdup(value);
 193             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 194             break;
 195         }
 196         case SP_ATTR_HORIZ_ADV_X:
 197         {
 198             double number = value ? g_ascii_strtod(value, 0) : 0;
 199             if (number != glyph->horiz_adv_x){
 200                 glyph->horiz_adv_x = number;
 201                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 202             }
 203             break;
 204         }
 205         case SP_ATTR_VERT_ORIGIN_X:
 206         {
 207             double number = value ? g_ascii_strtod(value, 0) : 0;
 208             if (number != glyph->vert_origin_x){
 209                 glyph->vert_origin_x = number;
 210                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 211             }
 212             break;
 213         }
 214         case SP_ATTR_VERT_ORIGIN_Y:
 215         {
 216             double number = value ? g_ascii_strtod(value, 0) : 0;
 217             if (number != glyph->vert_origin_y){
 218                 glyph->vert_origin_y = number;
 219                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 220             }
 221             break;
 222         }
 223         case SP_ATTR_VERT_ADV_Y:
 224         {
 225             double number = value ? g_ascii_strtod(value, 0) : 0;
 226             if (number != glyph->vert_adv_y){
 227                 glyph->vert_adv_y = number;
 228                 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 229             }
 230             break;
 231         }
 232         default:
 233         {
 234             if (((SPObjectClass *) (parent_class))->set) {
 235                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 236             }
 237             break;
 238         }
 239     }
 240 }
 241
 242 /**
 243  *  * Receives update notifications.
 244  *   */
 245 static void
 246 sp_glyph_update(SPObject *object, SPCtx *ctx, guint flags)
 247 {
 248     SPGlyph *glyph = SP_GLYPH(object);
 249     (void)glyph;
 250
 251     if (flags & SP_OBJECT_MODIFIED_FLAG) {
 252         /* do something to trigger redisplay, updates? */
 253             object->readAttr( "unicode");
 254             object->readAttr( "glyph-name");
 255             object->readAttr( "d");
 256             object->readAttr( "orientation");
 257             object->readAttr( "arabic-form");
 258             object->readAttr( "lang");
 259             object->readAttr( "horiz-adv-x");
 260             object->readAttr( "vert-origin-x");
 261             object->readAttr( "vert-origin-y");
 262             object->readAttr( "vert-adv-y");
 263     }
 264
 265     if (((SPObjectClass *) parent_class)->update) {
 266         ((SPObjectClass *) parent_class)->update(object, ctx, flags);
 267     }
 268 }
 269
 270 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
 271
 272 static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
 273 {
 274 //    SPGlyph *glyph = SP_GLYPH(object);
 275
 276     if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
 277         repr = xml_doc->createElement("svg:glyph");
 278     }
 279
 280 /* I am commenting out this part because I am not certain how does it work. I will have to study it later. Juca
 281     repr->setAttribute("unicode", glyph->unicode);
 282     repr->setAttribute("glyph-name", glyph->glyph_name);
 283     repr->setAttribute("d", glyph->d);
 284     sp_repr_set_svg_double(repr, "orientation", (double) glyph->orientation);
 285     sp_repr_set_svg_double(repr, "arabic-form", (double) glyph->arabic_form);
 286     repr->setAttribute("lang", glyph->lang);
 287     sp_repr_set_svg_double(repr, "horiz-adv-x", glyph->horiz_adv_x);
 288     sp_repr_set_svg_double(repr, "vert-origin-x", glyph->vert_origin_x);
 289     sp_repr_set_svg_double(repr, "vert-origin-y", glyph->vert_origin_y);
 290     sp_repr_set_svg_double(repr, "vert-adv-y", glyph->vert_adv_y);
 291 */
 292     if (repr != SP_OBJECT_REPR(object)) {
 293                 /* All the COPY_ATTR functions below use
 294                    XML Tree directly while they shouldn't. */
 295         COPY_ATTR(repr, object->getRepr(), "unicode");
 296         COPY_ATTR(repr, object->getRepr(), "glyph-name");
 297         COPY_ATTR(repr, object->getRepr(), "d");
 298         COPY_ATTR(repr, object->getRepr(), "orientation");
 299         COPY_ATTR(repr, object->getRepr(), "arabic-form");
 300         COPY_ATTR(repr, object->getRepr(), "lang");
 301         COPY_ATTR(repr, object->getRepr(), "horiz-adv-x");
 302         COPY_ATTR(repr, object->getRepr(), "vert-origin-x");
 303         COPY_ATTR(repr, object->getRepr(), "vert-origin-y");
 304         COPY_ATTR(repr, object->getRepr(), "vert-adv-y");
 305     }
 306
 307     if (((SPObjectClass *) (parent_class))->write) {
 308         ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
 309     }
 310
 311     return repr;
 312 }
 313 #endif //#ifdef ENABLE_SVG_FONTS
 314 /*
 315   Local Variables:
 316   mode:c++
 317   c-file-style:"stroustrup"
 318   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 319   indent-tabs-mode:nil
 320   fill-column:99
 321   End:
 322 */
 323 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :