src/sp-filter-primitive.cpp

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