1 files changed, 172 insertions, 0 deletions
diff --git a/source/xps/xps-resource.c b/source/xps/xps-resource.c
new file mode 100644
index 00000000..5c927e1d
--- /dev/null
+++ b/source/xps/xps-resource.c
@@ -0,0 +1,172 @@
+#include "mupdf/xps.h"
+
+static fz_xml *
+xps_lookup_resource(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(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(doc, dict, name, urip);
+}
+
+void
+xps_resolve_resource_reference(xps_document *doc, xps_resource *dict,
+		char **attp, fz_xml **tagp, char **urip)
+{
+	if (*attp)
+	{
+		fz_xml *rsrc = xps_parse_resource_reference(doc, dict, *attp, urip);
+		if (rsrc)
+		{
+			*attp = NULL;
+			*tagp = rsrc;
+		}
+	}
+}
+
+static xps_resource *
+xps_parse_remote_resource_dictionary(xps_document *doc, char *base_uri, char *source_att)
+{
+	char part_name[1024];
+	char part_uri[1024];
+	xps_resource *dict;
+	xps_part *part;
+	fz_xml *xml;
+	char *s;
+	fz_context *ctx = doc->ctx;
+
+	/* External resource dictionaries MUST NOT reference other resource dictionaries */
+	xps_resolve_url(part_name, base_uri, source_att, sizeof part_name);
+	part = xps_read_part(doc, part_name);
+	fz_try(ctx)
+	{
+		xml = fz_parse_xml(doc->ctx, part->data, part->size);
+	}
+	fz_always(ctx)
+	{
+		xps_free_part(doc, part);
+	}
+	fz_catch(ctx)
+	{
+		/* FIXME: TryLater ? */
+		xml = NULL;
+	}
+
+	if (!xml)
+		return NULL;
+
+	if (strcmp(fz_xml_tag(xml), "ResourceDictionary"))
+	{
+		fz_free_xml(doc->ctx, xml);
+		fz_throw(doc->ctx, FZ_ERROR_GENERIC, "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(doc, part_uri, xml);
+	if (dict)
+		dict->base_xml = xml; /* pass on ownership */
+
+	return dict;
+}
+
+xps_resource *
+xps_parse_resource_dictionary(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(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(doc->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)
+		head->base_uri = fz_strdup(doc->ctx, base_uri);
+
+	return head;
+}
+
+void
+xps_free_resource_dictionary(xps_document *doc, xps_resource *dict)
+{
+	xps_resource *next;
+	while (dict)
+	{
+		next = dict->next;
+		if (dict->base_xml)
+			fz_free_xml(doc->ctx, dict->base_xml);
+		if (dict->base_uri)
+			fz_free(doc->ctx, dict->base_uri);
+		fz_free(doc->ctx, dict);
+		dict = next;
+	}
+}
+
+void
+xps_print_resource_dictionary(xps_resource *dict)
+{
+	while (dict)
+	{
+		if (dict->base_uri)
+			printf("URI = '%s'\n", dict->base_uri);
+		printf("KEY = '%s' VAL = %p\n", dict->name, dict->data);
+		if (dict->parent)
+		{
+			printf("PARENT = {\n");
+			xps_print_resource_dictionary(dict->parent);
+			printf("}\n");
+		}
+		dict = dict->next;
+	}
+}