src/sp-filter-primitive.cpp

   1 #define __SP_FILTER_PRIMITIVE_CPP__\r
   2 \r
   3 /** \file\r
   4  * SVG <filter_primitive> implementation, used as an example for a base starting class\r
   5  * when implementing new sp-objects.\r
   6  *\r
   7  * In vi, three global search-and-replaces will let you rename everything\r
   8  * in this and the .h file:\r
   9  *\r
  10  *   :%s/FILTER_PRIMITIVE/YOURNAME/g\r
  11  *   :%s/FilterPrimitive/Yourname/g\r
  12  *   :%s/filter_primitive/yourname/g\r
  13  */\r
  14 /*\r
  15  * Authors:\r
  16  *   Kees Cook <kees@outflux.net>\r
  17  *\r
  18  * Copyright (C) 2004 Kees Cook\r
  19  *\r
  20  * Released under GNU GPL, read the file 'COPYING' for more information\r
  21  */\r
  22 \r
  23 #ifdef HAVE_CONFIG_H\r
  24 # include "config.h"\r
  25 #endif\r
  26 \r
  27 #include "attributes.h"\r
  28 #include "sp-filter-primitive.h"\r
  29 #include "xml/repr.h"\r
  30 \r
  31 \r
  32 /* FilterPrimitive base class */\r
  33 \r
  34 static void sp_filter_primitive_class_init(SPFilterPrimitiveClass *klass);\r
  35 static void sp_filter_primitive_init(SPFilterPrimitive *filter_primitive);\r
  36 \r
  37 static void sp_filter_primitive_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);\r
  38 static void sp_filter_primitive_release(SPObject *object);\r
  39 static void sp_filter_primitive_set(SPObject *object, unsigned int key, gchar const *value);\r
  40 static void sp_filter_primitive_update(SPObject *object, SPCtx *ctx, guint flags);\r
  41 static Inkscape::XML::Node *sp_filter_primitive_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);\r
  42 \r
  43 static SPObjectClass *filter_primitive_parent_class;\r
  44 \r
  45 GType\r
  46 sp_filter_primitive_get_type()\r
  47 {\r
  48     static GType filter_primitive_type = 0;\r
  49 \r
  50     if (!filter_primitive_type) {\r
  51         GTypeInfo filter_primitive_info = {\r
  52             sizeof(SPFilterPrimitiveClass),\r
  53             NULL, NULL,\r
  54             (GClassInitFunc) sp_filter_primitive_class_init,\r
  55             NULL, NULL,\r
  56             sizeof(SPFilterPrimitive),\r
  57             16,\r
  58             (GInstanceInitFunc) sp_filter_primitive_init,\r
  59             NULL,    /* value_table */\r
  60         };\r
  61         filter_primitive_type = g_type_register_static(SP_TYPE_OBJECT, "SPFilterPrimitive", &filter_primitive_info, (GTypeFlags)0);\r
  62     }\r
  63     return filter_primitive_type;\r
  64 }\r
  65 \r
  66 static void\r
  67 sp_filter_primitive_class_init(SPFilterPrimitiveClass *klass)\r
  68 {\r
  69     //GObjectClass *gobject_class = (GObjectClass *)klass;\r
  70     SPObjectClass *sp_object_class = (SPObjectClass *)klass;\r
  71 \r
  72     filter_primitive_parent_class = (SPObjectClass*)g_type_class_peek_parent(klass);\r
  73 \r
  74     sp_object_class->build = sp_filter_primitive_build;\r
  75     sp_object_class->release = sp_filter_primitive_release;\r
  76     sp_object_class->write = sp_filter_primitive_write;\r
  77     sp_object_class->set = sp_filter_primitive_set;\r
  78     sp_object_class->update = sp_filter_primitive_update;\r
  79 }\r
  80 \r
  81 static void\r
  82 sp_filter_primitive_init(SPFilterPrimitive *filter_primitive)\r
  83 {\r
  84 }\r
  85 \r
  86 /**\r
  87  * Reads the Inkscape::XML::Node, and initializes SPFilterPrimitive variables.  For this to get called,\r
  88  * our name must be associated with a repr via "sp_object_type_register".  Best done through\r
  89  * sp-object-repr.cpp's repr_name_entries array.\r
  90  */\r
  91 static void\r
  92 sp_filter_primitive_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)\r
  93 {\r
  94     if (((SPObjectClass *) filter_primitive_parent_class)->build) {\r
  95         ((SPObjectClass *) filter_primitive_parent_class)->build(object, document, repr);\r
  96     }\r
  97 \r
  98     /*\r
  99        Pay attention to certain settings here\r
 100 \r
 101     sp_object_read_attr(object, "xlink:href");\r
 102     sp_object_read_attr(object, "attributeName");\r
 103     sp_object_read_attr(object, "attributeType");\r
 104     sp_object_read_attr(object, "begin");\r
 105     sp_object_read_attr(object, "dur");\r
 106     sp_object_read_attr(object, "end");\r
 107     sp_object_read_attr(object, "min");\r
 108     sp_object_read_attr(object, "max");\r
 109     sp_object_read_attr(object, "restart");\r
 110     sp_object_read_attr(object, "repeatCount");\r
 111     sp_object_read_attr(object, "repeatDur");\r
 112     sp_object_read_attr(object, "fill");\r
 113     */\r
 114 }\r
 115 \r
 116 /**\r
 117  * Drops any allocated memory.\r
 118  */\r
 119 static void\r
 120 sp_filter_primitive_release(SPObject *object)\r
 121 {\r
 122 \r
 123     /* deal with our children and our selves here */\r
 124 \r
 125     if (((SPObjectClass *) filter_primitive_parent_class)->release)\r
 126         ((SPObjectClass *) filter_primitive_parent_class)->release(object);\r
 127 }\r
 128 \r
 129 /**\r
 130  * Sets a specific value in the SPFilterPrimitive.\r
 131  */\r
 132 static void\r
 133 sp_filter_primitive_set(SPObject *object, unsigned int key, gchar const *value)\r
 134 {\r
 135     SPFilterPrimitive *filter_primitive = SP_FILTER_PRIMITIVE(object);\r
 136 \r
 137     /* See if any parents need this value. */\r
 138     if (((SPObjectClass *) filter_primitive_parent_class)->set) {\r
 139         ((SPObjectClass *) filter_primitive_parent_class)->set(object, key, value);\r
 140     }\r
 141 }\r
 142 \r
 143 /**\r
 144  * Receives update notifications.\r
 145  */\r
 146 static void\r
 147 sp_filter_primitive_update(SPObject *object, SPCtx *ctx, guint flags)\r
 148 {\r
 149     //SPFilterPrimitive *filter_primitive = SP_FILTER_PRIMITIVE(object);\r
 150 \r
 151     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |\r
 152                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {\r
 153 \r
 154         /* do something to trigger redisplay, updates? */\r
 155 \r
 156     }\r
 157 \r
 158     if (((SPObjectClass *) filter_primitive_parent_class)->update) {\r
 159         ((SPObjectClass *) filter_primitive_parent_class)->update(object, ctx, flags);\r
 160     }\r
 161 }\r
 162 \r
 163 /**\r
 164  * Writes its settings to an incoming repr object, if any.\r
 165  */\r
 166 static Inkscape::XML::Node *\r
 167 sp_filter_primitive_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)\r
 168 {\r
 169     //SPFilterPrimitive *filterPrimitive = SP_FILTER_PRIMITIVE(object);\r
 170 \r
 171     // Inkscape-only object, not copied during an "plain SVG" dump:\r
 172     if (flags & SP_OBJECT_WRITE_EXT) {\r
 173         if (repr) {\r
 174             // is this sane?\r
 175             repr->mergeFrom(SP_OBJECT_REPR(object), "id");\r
 176         } else {\r
 177             repr = SP_OBJECT_REPR(object)->duplicate();\r
 178         }\r
 179     }\r
 180 \r
 181     if (((SPObjectClass *) filter_primitive_parent_class)->write) {\r
 182         ((SPObjectClass *) filter_primitive_parent_class)->write(object, repr, flags);\r
 183     }\r
 184 \r
 185     return repr;\r
 186 }\r
 187 \r
 188 \r
 189 /*\r
 190   Local Variables:\r
 191   mode:c++\r
 192   c-file-style:"stroustrup"\r
 193   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))\r
 194   indent-tabs-mode:nil\r
 195   fill-column:99\r
 196   End:\r
 197 */\r
 198 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :\r