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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 ts=4 expandtab: */
/*
rsvg-defs.c: Manage SVG defs and references.
Copyright (C) 2000 Eazel, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Raph Levien <raph@artofcode.com>
*/
#include "config.h"
#include "rsvg-private.h"
#include "rsvg-defs.h"
#include "rsvg-styles.h"
#include "rsvg-image.h"
#include "rsvg-io.h"
#include <glib.h>
struct _RsvgDefs {
GHashTable *hash;
GPtrArray *unnamed;
GHashTable *externs;
GSList *toresolve;
RsvgHandle *ctx;
};
typedef struct _RsvgResolutionPending RsvgResolutionPending;
struct _RsvgResolutionPending {
RsvgNode **tochange;
char *name;
};
RsvgDefs *
rsvg_defs_new (RsvgHandle *handle)
{
RsvgDefs *result = g_new (RsvgDefs, 1);
result->hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
result->externs =
g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_object_unref);
result->unnamed = g_ptr_array_new ();
result->toresolve = NULL;
result->ctx = handle; /* no need to take a ref here */
return result;
}
static int
rsvg_defs_load_extern (const RsvgDefs * defs, const char *name)
{
RsvgHandle *handle;
gchar *filename, *base_uri;
guint8 *data;
gsize data_len;
filename = rsvg_get_file_path (name, rsvg_handle_get_base_uri (defs->ctx));
data = _rsvg_handle_acquire_data (defs->ctx, name, &data_len, NULL);
if (data) {
handle = rsvg_handle_new ();
base_uri = rsvg_get_base_uri_from_filename (filename);
rsvg_handle_set_base_uri (handle, base_uri);
g_free (base_uri);
if (rsvg_handle_write (handle, data, data_len, NULL) &&
rsvg_handle_close (handle, NULL)) {
g_hash_table_insert (defs->externs, g_strdup (name), handle);
}
g_free (data);
}
g_free (filename);
return 0;
}
static RsvgNode *
rsvg_defs_extern_lookup (const RsvgDefs * defs, const char *filename, const char *name)
{
RsvgHandle *file;
file = (RsvgHandle *) g_hash_table_lookup (defs->externs, filename);
if (file == NULL) {
if (rsvg_defs_load_extern (defs, filename))
return NULL;
file = (RsvgHandle *) g_hash_table_lookup (defs->externs, filename);
}
if (file != NULL)
return (RsvgNode *) g_hash_table_lookup (file->priv->defs->hash, name);
else
return NULL;
}
RsvgNode *
rsvg_defs_lookup (const RsvgDefs * defs, const char *name)
{
char *hashpos;
hashpos = g_strrstr (name, "#");
if (!hashpos) {
return NULL;
}
if (hashpos == name) {
return (RsvgNode *) g_hash_table_lookup (defs->hash, name + 1);
} else {
gchar **splitbits;
RsvgNode *toreturn;
splitbits = g_strsplit (name, "#", 2);
toreturn = rsvg_defs_extern_lookup (defs, splitbits[0], splitbits[1]);
g_strfreev (splitbits);
return toreturn;
}
}
void
rsvg_defs_set (RsvgDefs * defs, const char *name, RsvgNode * val)
{
if (name == NULL);
else if (name[0] == '\0');
else
rsvg_defs_register_name (defs, name, val);
rsvg_defs_register_memory (defs, val);
}
void
rsvg_defs_register_name (RsvgDefs * defs, const char *name, RsvgNode * val)
{
g_hash_table_insert (defs->hash, g_strdup (name), val);
}
void
rsvg_defs_register_memory (RsvgDefs * defs, RsvgNode * val)
{
g_ptr_array_add (defs->unnamed, val);
}
static void
rsvg_defs_free_toresolve (RsvgDefs *defs)
{
GSList *l;
for (l = defs->toresolve; l ; l = l ->next) {
RsvgResolutionPending *data = l->data;
g_free (data->name);
g_free (data);
}
g_slist_free (defs->toresolve);
}
void
rsvg_defs_free (RsvgDefs * defs)
{
guint i;
g_hash_table_destroy (defs->hash);
for (i = 0; i < defs->unnamed->len; i++)
((RsvgNode *) g_ptr_array_index (defs->unnamed, i))->
free (g_ptr_array_index (defs->unnamed, i));
g_ptr_array_free (defs->unnamed, TRUE);
g_hash_table_destroy (defs->externs);
rsvg_defs_free_toresolve (defs);
g_free (defs);
}
void
rsvg_defs_add_resolver (RsvgDefs * defs, RsvgNode ** tochange, const gchar * name)
{
RsvgResolutionPending *data;
data = g_new (RsvgResolutionPending, 1);
data->tochange = tochange;
data->name = g_strdup (name);
defs->toresolve = g_slist_prepend (defs->toresolve, data);
}
void
rsvg_defs_resolve_all (RsvgDefs * defs)
{
GSList *l;
for (l = defs->toresolve; l ; l = l ->next) {
RsvgResolutionPending *data = l->data;
*(data->tochange) = rsvg_defs_lookup (defs, data->name);
}
rsvg_defs_free_toresolve (defs);
defs->toresolve = NULL;
}
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