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 *
13 * Copyright (C) 2008, Felipe C. da S. Sanches
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #include "xml/repr.h"
19 #include "attributes.h"
20 #include "sp-font.h"
21 #include "sp-glyph.h"
22 #include "sp-missing-glyph.h"
23 #include "document.h"
25 #include "display/nr-svgfonts.h"
27 static void sp_font_class_init(SPFontClass *fc);
28 static void sp_font_init(SPFont *font);
30 static void sp_font_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
31 static void sp_font_release(SPObject *object);
32 static void sp_font_set(SPObject *object, unsigned int key, const gchar *value);
33 static Inkscape::XML::Node *sp_font_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
35 static void sp_font_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
36 static void sp_font_remove_child(SPObject *object, Inkscape::XML::Node *child);
37 static void sp_font_update(SPObject *object, SPCtx *ctx, guint flags);
39 // static gchar *sp_font_description(SPItem *item);
41 static SPObjectClass *parent_class;
43 GType sp_font_get_type(void)
44 {
45 static GType type = 0;
47 if (!type) {
48 GTypeInfo info = {
49 sizeof(SPFontClass),
50 NULL, /* base_init */
51 NULL, /* base_finalize */
52 (GClassInitFunc) sp_font_class_init,
53 NULL, /* class_finalize */
54 NULL, /* class_data */
55 sizeof(SPFont),
56 16, /* n_preallocs */
57 (GInstanceInitFunc) sp_font_init,
58 NULL, /* value_table */
59 };
60 type = g_type_register_static(SP_TYPE_OBJECT, "SPFont", &info, (GTypeFlags) 0);
61 }
63 return type;
64 }
66 static void sp_font_class_init(SPFontClass *fc)
67 {
68 SPObjectClass *sp_object_class = (SPObjectClass *) fc;
70 parent_class = (SPObjectClass *) g_type_class_ref(SP_TYPE_OBJECT);
72 sp_object_class->build = sp_font_build;
73 sp_object_class->release = sp_font_release;
74 sp_object_class->set = sp_font_set;
75 sp_object_class->write = sp_font_write;
76 sp_object_class->child_added = sp_font_child_added;
77 sp_object_class->remove_child = sp_font_remove_child;
78 sp_object_class->update = sp_font_update;
79 }
81 //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
83 // TODO determine better values and/or make these dynamic:
84 double FNT_DEFAULT_ADV = 90; // TODO determine proper default
85 double FNT_DEFAULT_ASCENT = 90; // TODO determine proper default
86 double FNT_UNITS_PER_EM = 90; // TODO determine proper default
88 static void sp_font_init(SPFont *font)
89 {
90 font->horiz_origin_x = 0;
91 font->horiz_origin_y = 0;
92 font->horiz_adv_x = FNT_DEFAULT_ADV;
93 font->vert_origin_x = FNT_DEFAULT_ADV / 2.0;
94 font->vert_origin_y = FNT_DEFAULT_ASCENT;
95 font->vert_adv_y = FNT_UNITS_PER_EM;
96 }
98 static void sp_font_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
99 {
100 if (((SPObjectClass *) (parent_class))->build) {
101 ((SPObjectClass *) (parent_class))->build(object, document, repr);
102 }
104 sp_object_read_attr(object, "horiz-origin-x");
105 sp_object_read_attr(object, "horiz-origin-y");
106 sp_object_read_attr(object, "horiz-adv-x");
107 sp_object_read_attr(object, "vert-origin-x");
108 sp_object_read_attr(object, "vert-origin-y");
109 sp_object_read_attr(object, "vert-adv-y");
111 sp_document_add_resource(document, "font", object);
112 }
115 static void sp_font_children_modified(SPFont */*sp_font*/)
116 {
117 }
119 /**
120 * Callback for child_added event.
121 */
122 static void
123 sp_font_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
124 {
125 SPFont *f = SP_FONT(object);
127 if (((SPObjectClass *) parent_class)->child_added)
128 (* ((SPObjectClass *) parent_class)->child_added)(object, child, ref);
130 sp_font_children_modified(f);
131 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
132 }
135 /**
136 * Callback for remove_child event.
137 */
138 static void
139 sp_font_remove_child(SPObject *object, Inkscape::XML::Node *child)
140 {
141 SPFont *f = SP_FONT(object);
143 if (((SPObjectClass *) parent_class)->remove_child)
144 (* ((SPObjectClass *) parent_class)->remove_child)(object, child);
146 sp_font_children_modified(f);
147 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
148 }
150 static void sp_font_release(SPObject *object)
151 {
152 //SPFont *font = SP_FONT(object);
153 sp_document_remove_resource(SP_OBJECT_DOCUMENT(object), "font", object);
155 if (((SPObjectClass *) parent_class)->release) {
156 ((SPObjectClass *) parent_class)->release(object);
157 }
158 }
160 static void sp_font_set(SPObject *object, unsigned int key, const gchar *value)
161 {
162 SPFont *font = SP_FONT(object);
164 // TODO these are floating point, so some epsilon comparison would be good
165 switch (key) {
166 case SP_ATTR_HORIZ_ORIGIN_X:
167 {
168 double number = value ? g_ascii_strtod(value, 0) : 0;
169 if (number != font->horiz_origin_x){
170 font->horiz_origin_x = number;
171 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
172 }
173 break;
174 }
175 case SP_ATTR_HORIZ_ORIGIN_Y:
176 {
177 double number = value ? g_ascii_strtod(value, 0) : 0;
178 if (number != font->horiz_origin_y){
179 font->horiz_origin_y = number;
180 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
181 }
182 break;
183 }
184 case SP_ATTR_HORIZ_ADV_X:
185 {
186 double number = value ? g_ascii_strtod(value, 0) : FNT_DEFAULT_ADV;
187 if (number != font->horiz_adv_x){
188 font->horiz_adv_x = number;
189 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
190 }
191 break;
192 }
193 case SP_ATTR_VERT_ORIGIN_X:
194 {
195 double number = value ? g_ascii_strtod(value, 0) : FNT_DEFAULT_ADV / 2.0;
196 if (number != font->vert_origin_x){
197 font->vert_origin_x = number;
198 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
199 }
200 break;
201 }
202 case SP_ATTR_VERT_ORIGIN_Y:
203 {
204 double number = value ? g_ascii_strtod(value, 0) : FNT_DEFAULT_ASCENT;
205 if (number != font->vert_origin_y){
206 font->vert_origin_y = number;
207 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
208 }
209 break;
210 }
211 case SP_ATTR_VERT_ADV_Y:
212 {
213 double number = value ? g_ascii_strtod(value, 0) : FNT_UNITS_PER_EM;
214 if (number != font->vert_adv_y){
215 font->vert_adv_y = number;
216 object->requestModified(SP_OBJECT_MODIFIED_FLAG);
217 }
218 break;
219 }
220 default:
221 if (((SPObjectClass *) (parent_class))->set) {
222 ((SPObjectClass *) (parent_class))->set(object, key, value);
223 }
224 break;
225 }
226 }
228 /**
229 * Receives update notifications.
230 */
231 static void
232 sp_font_update(SPObject *object, SPCtx *ctx, guint flags)
233 {
234 if (flags & (SP_OBJECT_MODIFIED_FLAG)) {
235 sp_object_read_attr(object, "horiz-origin-x");
236 sp_object_read_attr(object, "horiz-origin-y");
237 sp_object_read_attr(object, "horiz-adv-x");
238 sp_object_read_attr(object, "vert-origin-x");
239 sp_object_read_attr(object, "vert-origin-y");
240 sp_object_read_attr(object, "vert-adv-y");
241 }
243 if (((SPObjectClass *) parent_class)->update) {
244 ((SPObjectClass *) parent_class)->update(object, ctx, flags);
245 }
246 }
248 #define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
250 static Inkscape::XML::Node *sp_font_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
251 {
252 SPFont *font = SP_FONT(object);
254 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
255 repr = xml_doc->createElement("svg:font");
256 }
258 sp_repr_set_svg_double(repr, "horiz-origin-x", font->horiz_origin_x);
259 sp_repr_set_svg_double(repr, "horiz-origin-y", font->horiz_origin_y);
260 sp_repr_set_svg_double(repr, "horiz-adv-x", font->horiz_adv_x);
261 sp_repr_set_svg_double(repr, "vert-origin-x", font->vert_origin_x);
262 sp_repr_set_svg_double(repr, "vert-origin-y", font->vert_origin_y);
263 sp_repr_set_svg_double(repr, "vert-adv-y", font->vert_adv_y);
265 if (repr != SP_OBJECT_REPR(object)) {
266 COPY_ATTR(repr, object->repr, "horiz-origin-x");
267 COPY_ATTR(repr, object->repr, "horiz-origin-y");
268 COPY_ATTR(repr, object->repr, "horiz-adv-x");
269 COPY_ATTR(repr, object->repr, "vert-origin-x");
270 COPY_ATTR(repr, object->repr, "vert-origin-y");
271 COPY_ATTR(repr, object->repr, "vert-adv-y");
272 }
274 if (((SPObjectClass *) (parent_class))->write) {
275 ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
276 }
278 return repr;
279 }
280 #endif //#ifdef ENABLE_SVG_FONTS
281 /*
282 Local Variables:
283 mode:c++
284 c-file-style:"stroustrup"
285 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
286 indent-tabs-mode:nil
287 fill-column:99
288 End:
289 */
290 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :