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// Copyright (C) 2004-2021 Artifex Software, Inc.
//
// This file is part of MuPDF.
//
// MuPDF is free software: you can redistribute it and/or modify it under the
// terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// MuPDF 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 Affero General Public License for more
// details.
//
// You should have received a copy of the GNU Affero General Public License
// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
//
// Alternative licensing terms are available from the licensor.
// For commercial licensing, see <https://www.artifex.com/> or contact
// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
// CA 94129, USA, for further information.
#include "mupdf/fitz.h"
#include "xps-imp.h"
#include <string.h>
static fz_xml *
xps_lookup_resource(fz_context *ctx, xps_document *doc, xps_resource *dict, char *name, char **urip)
{
xps_resource *head, *node;
for (head = dict; head; head = head->parent)
{
for (node = head; node; node = node->next)
{
if (!strcmp(node->name, name))
{
if (urip && head->base_uri)
*urip = head->base_uri;
return node->data;
}
}
}
return NULL;
}
static fz_xml *
xps_parse_resource_reference(fz_context *ctx, xps_document *doc, xps_resource *dict, char *att, char **urip)
{
char name[1024];
char *s;
if (strstr(att, "{StaticResource ") != att)
return NULL;
fz_strlcpy(name, att + 16, sizeof name);
s = strrchr(name, '}');
if (s)
*s = 0;
return xps_lookup_resource(ctx, doc, dict, name, urip);
}
void
xps_resolve_resource_reference(fz_context *ctx, xps_document *doc, xps_resource *dict,
char **attp, fz_xml **tagp, char **urip)
{
if (*attp)
{
fz_xml *rsrc = xps_parse_resource_reference(ctx, doc, dict, *attp, urip);
if (rsrc)
{
*attp = NULL;
*tagp = rsrc;
}
}
}
static xps_resource *
xps_parse_remote_resource_dictionary(fz_context *ctx, xps_document *doc, char *base_uri, char *source_att)
{
char part_name[1024];
char part_uri[1024];
xps_part *part;
xps_resource *dict = NULL;
fz_xml_doc *xml = NULL;
char *s;
fz_var(xml);
/* External resource dictionaries MUST NOT reference other resource dictionaries */
xps_resolve_url(ctx, doc, part_name, base_uri, source_att, sizeof part_name);
part = xps_read_part(ctx, doc, part_name);
fz_try(ctx)
{
xml = fz_parse_xml(ctx, part->data, 0);
if (!fz_xml_is_tag(fz_xml_root(xml), "ResourceDictionary"))
fz_throw(ctx, FZ_ERROR_FORMAT, "expected ResourceDictionary element");
fz_strlcpy(part_uri, part_name, sizeof part_uri);
s = strrchr(part_uri, '/');
if (s)
s[1] = 0;
dict = xps_parse_resource_dictionary(ctx, doc, part_uri, fz_xml_root(xml));
if (dict)
{
dict->base_xml = xml; /* pass on ownership */
xml = NULL;
}
}
fz_always(ctx)
{
xps_drop_part(ctx, doc, part);
fz_drop_xml(ctx, xml);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
return dict;
}
xps_resource *
xps_parse_resource_dictionary(fz_context *ctx, xps_document *doc, char *base_uri, fz_xml *root)
{
xps_resource *head;
xps_resource *entry;
fz_xml *node;
char *source;
char *key;
source = fz_xml_att(root, "Source");
if (source)
return xps_parse_remote_resource_dictionary(ctx, doc, base_uri, source);
head = NULL;
for (node = fz_xml_down(root); node; node = fz_xml_next(node))
{
key = fz_xml_att(node, "x:Key");
if (key)
{
entry = fz_malloc_struct(ctx, xps_resource);
entry->name = key;
entry->base_uri = NULL;
entry->base_xml = NULL;
entry->data = node;
entry->next = head;
entry->parent = NULL;
head = entry;
}
}
if (head)
{
fz_try(ctx)
head->base_uri = fz_strdup(ctx, base_uri);
fz_catch(ctx)
{
fz_free(ctx, entry);
fz_rethrow(ctx);
}
}
return head;
}
void
xps_drop_resource_dictionary(fz_context *ctx, xps_document *doc, xps_resource *dict)
{
xps_resource *next;
while (dict)
{
next = dict->next;
fz_drop_xml(ctx, dict->base_xml);
fz_free(ctx, dict->base_uri);
fz_free(ctx, dict);
dict = next;
}
}
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