1 #ifdef HAVE_CONFIG_H
2 # include <config.h>
3 #endif
5 #ifdef ENABLE_SVG_FONTS
7 /*
8 * SVG <font> element implementation
9 *
10 * Author:
11 * Felipe C. da S. Sanches <juca@members.fsf.org>
12 * Abhishek Sharma
13 *
14 * Copyright (C) 2008, Felipe C. da S. Sanches
15 *
16 * Released under GNU GPL, read the file 'COPYING' for more information
17 */
19 #include "xml/repr.h"
20 #include "attributes.h"
21 #include "sp-font.h"
22 #include "sp-glyph.h"
23 #include "sp-missing-glyph.h"
24 #include "document.h"
26 #include "display/nr-svgfonts.h"
28 static void sp_font_class_init(SPFontClass *fc);
29 static void sp_font_init(SPFont *font);
31 static void sp_font_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
32 static void sp_font_release(SPObject *object);
33 static void sp_font_set(SPObject *object, unsigned int key, const gchar *value);
34 static Inkscape::XML::Node *sp_font_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
36 static void sp_font_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
37 static void sp_font_remove_child(SPObject *object, Inkscape::XML::Node *child);
38 static void sp_font_update(SPObject *object, SPCtx *ctx, guint flags);
40 // static gchar *sp_font_description(SPItem *item);
42 static SPObjectClass *parent_class;
44 GType sp_font_get_type(void)
45 {
46 static GType type = 0;
48 if (!type) {
49 GTypeInfo info = {
50 sizeof(SPFontClass),
51 NULL, /* base_init */
52 NULL, /* base_finalize */
53 (GClassInitFunc) sp_font_class_init,
54 NULL, /* class_finalize */
55 NULL, /* class_data */
56 sizeof(SPFont),
57 16, /* n_preallocs */
58 (GInstanceInitFunc) sp_font_init,
59 NULL, /* value_table */
60 };
61 type = g_type_register_static(SP_TYPE_OBJECT, "SPFont", &info, (GTypeFlags) 0);
62 }
64 return type;
65 }
67 static void sp_font_class_init(SPFontClass *fc)
68 {
69 SPObjectClass *sp_object_class = (SPObjectClass *) fc;
71 parent_class = (SPObjectClass *) g_type_class_ref(SP_TYPE_OBJECT);
73 sp_object_class->build = sp_font_build;
74 sp_object_class->release = sp_font_release;
75 sp_object_class->set = sp_font_set;
76 sp_object_class->write = sp_font_write;
77 sp_object_class->child_added = sp_font_child_added;
78 sp_object_class->remove_child = sp_font_remove_child;
79 sp_object_class->update = sp_font_update;
80 }
82 //I think we should have extra stuff here and in the set method in order to set default value as specified at http://www.w3.org/TR/SVG/fonts.html
84 // TODO determine better values and/or make these dynamic:
85 double FNT_DEFAULT_ADV = 90; // TODO determine proper default
86 double FNT_DEFAULT_ASCENT = 90; // TODO determine proper default
87 double FNT_UNITS_PER_EM = 90; // TODO determine proper default
89 static void sp_font_init(SPFont *font)
90 {
91 font->horiz_origin_x = 0;
92 font->horiz_origin_y = 0;
93 font->horiz_adv_x = FNT_DEFAULT_ADV;
94 font->vert_origin_x = FNT_DEFAULT_ADV / 2.0;
95 font->vert_origin_y = FNT_DEFAULT_ASCENT;
96 font->vert_adv_y = FNT_UNITS_PER_EM;
97 }
99 static void sp_font_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
100 {
101 if (((SPObjectClass *) (parent_class))->build) {
102 ((SPObjectClass *) (parent_class))->build(object, document, repr);
103 }
105 object->readAttr( "horiz-origin-x" );
106 object->readAttr( "horiz-origin-y" );
107 object->readAttr( "horiz-adv-x" );
108 object->readAttr( "vert-origin-x" );
109 object->readAttr( "vert-origin-y" );
110 object->readAttr( "vert-adv-y" );
112 document->addResource("font", object);
113 }
116 static void sp_font_children_modified(SPFont */*sp_font*/)
117 {
118 }
120 /**
121 * Callback for child_added event.
122 */
123 static void
124 sp_font_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
125 {
126 SPFont *f = SP_FONT(object);
128 if (((SPObjectClass *) parent_class)->child_added)
129 (* ((SPObjectClass *) parent_class)->child_added)(object, child, ref);
131 sp_font_children_modified(f);
132 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
133 }
136 /**
137 * Callback for remove_child event.
138 */
139 static void
140 sp_font_remove_child(SPObject *object, Inkscape::XML::Node *child)
141 {
142 SPFont *f = SP_FONT(object);
144 if (((SPObjectClass *) parent_class)->remove_child)
145 (* ((SPObjectClass *) parent_class)->remove_child)(object, child);
147 sp_font_children_modified(f);
148 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
149 }
151 static void sp_font_release(SPObject *object)
152 {
153 //SPFont *font = SP_FONT(object);
154 SP_OBJECT_DOCUMENT(object)->removeResource("font", object);
156 if (((SPObjectClass *) parent_class)->release) {
157 ((SPObjectClass *) parent_class)->release(object);
158 }
159 }
161 static void sp_font_set(SPObject *object, unsigned int key, const gchar *value)
162 {
163 SPFont *font = SP_FONT(object);
165 // TODO these are floating point, so some epsilon comparison would be good
166 switch (key) {
167 case SP_ATTR_HORIZ_ORIGIN_X:
168 {
169 double number = value ? g_ascii_strtod(value, 0) : 0;
170 if (number != font->horiz_origin_x){
171 font->horiz_origin_x = number;
172 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
173 }
174 break;
175 }
176 case SP_ATTR_HORIZ_ORIGIN_Y:
177 {
178 double number = value ? g_ascii_strtod(value, 0) : 0;
179 if (number != font->horiz_origin_y){
180 font->horiz_origin_y = number;
181 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
182 }
183 break;
184 }
185 case SP_ATTR_HORIZ_ADV_X:
186 {
187 double number = value ? g_ascii_strtod(value, 0) : FNT_DEFAULT_ADV;
188 if (number != font->horiz_adv_x){
189 font->horiz_adv_x = number;
190 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
191 }
192 break;
193 }
194 case SP_ATTR_VERT_ORIGIN_X:
195 {
196 double number = value ? g_ascii_strtod(value, 0) : FNT_DEFAULT_ADV / 2.0;
197 if (number != font->vert_origin_x){
198 font->vert_origin_x = number;
199 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
200 }
201 break;
202 }
203 case SP_ATTR_VERT_ORIGIN_Y:
204 {
205 double number = value ? g_ascii_strtod(value, 0) : FNT_DEFAULT_ASCENT;
206 if (number != font->vert_origin_y){
207 font->vert_origin_y = number;
208 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
209 }
210 break;
211 }
212 case SP_ATTR_VERT_ADV_Y:
213 {
214 double number = value ? g_ascii_strtod(value, 0) : FNT_UNITS_PER_EM;
215 if (number != font->vert_adv_y){
216 font->vert_adv_y = number;
217 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
218 }
219 break;
220 }
221 default:
222 if (((SPObjectClass *) (parent_class))->set) {
223 ((SPObjectClass *) (parent_class))->set(object, key, value);
224 }
225 break;
226 }
227 }
229 /**
230 * Receives update notifications.
231 */
232 static void
233 sp_font_update(SPObject *object, SPCtx *ctx, guint flags)
234 {
235 if (flags & (SP_OBJECT_MODIFIED_FLAG)) {
236 object->readAttr( "horiz-origin-x" );
237 object->readAttr( "horiz-origin-y" );
238 object->readAttr( "horiz-adv-x" );
239 object->readAttr( "vert-origin-x" );
240 object->readAttr( "vert-origin-y" );
241 object->readAttr( "vert-adv-y" );
242 }
244 if (((SPObjectClass *) parent_class)->update) {
245 ((SPObjectClass *) parent_class)->update(object, ctx, flags);
246 }
247 }
249 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
251 static Inkscape::XML::Node *sp_font_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
252 {
253 SPFont *font = SP_FONT(object);
255 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
256 repr = xml_doc->createElement("svg:font");
257 }
259 sp_repr_set_svg_double(repr, "horiz-origin-x", font->horiz_origin_x);
260 sp_repr_set_svg_double(repr, "horiz-origin-y", font->horiz_origin_y);
261 sp_repr_set_svg_double(repr, "horiz-adv-x", font->horiz_adv_x);
262 sp_repr_set_svg_double(repr, "vert-origin-x", font->vert_origin_x);
263 sp_repr_set_svg_double(repr, "vert-origin-y", font->vert_origin_y);
264 sp_repr_set_svg_double(repr, "vert-adv-y", font->vert_adv_y);
266 if (repr != SP_OBJECT_REPR(object)) {
267 // All the below COPY_ATTR funtions are directly using
268 // the XML Tree while they shouldn't
269 COPY_ATTR(repr, object->getRepr(), "horiz-origin-x");
270 COPY_ATTR(repr, object->getRepr(), "horiz-origin-y");
271 COPY_ATTR(repr, object->getRepr(), "horiz-adv-x");
272 COPY_ATTR(repr, object->getRepr(), "vert-origin-x");
273 COPY_ATTR(repr, object->getRepr(), "vert-origin-y");
274 COPY_ATTR(repr, object->getRepr(), "vert-adv-y");
275 }
277 if (((SPObjectClass *) (parent_class))->write) {
278 ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
279 }
281 return repr;
282 }
283 #endif //#ifdef ENABLE_SVG_FONTS
284 /*
285 Local Variables:
286 mode:c++
287 c-file-style:"stroustrup"
288 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
289 indent-tabs-mode:nil
290 fill-column:99
291 End:
292 */
293 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :