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#include "mupdf/fitz.h"
#include "xps-imp.h"
#include <stdlib.h>
#include <math.h>
/*
* Parse the document structure / outline parts referenced from fixdoc relationships.
*/
static fz_outline *
xps_lookup_last_outline_at_level(fz_context *ctx, xps_document *doc, fz_outline *node, int level, int target_level)
{
while (node->next)
node = node->next;
if (level == target_level || !node->down)
return node;
return xps_lookup_last_outline_at_level(ctx, doc, node->down, level + 1, target_level);
}
static fz_outline *
xps_parse_document_outline(fz_context *ctx, xps_document *doc, fz_xml *root)
{
fz_xml *node;
fz_outline *head = NULL, *entry, *tail;
int last_level = 1, this_level;
for (node = fz_xml_down(root); node; node = fz_xml_next(node))
{
if (fz_xml_is_tag(node, "OutlineEntry"))
{
char *level = fz_xml_att(node, "OutlineLevel");
char *target = fz_xml_att(node, "OutlineTarget");
char *description = fz_xml_att(node, "Description");
if (!target || !description)
continue;
entry = fz_new_outline(ctx);
entry->title = fz_strdup(ctx, description);
entry->uri = fz_strdup(ctx, target);
entry->page = xps_lookup_link_target(ctx, (fz_document*)doc, target, NULL, NULL);
entry->down = NULL;
entry->next = NULL;
this_level = level ? atoi(level) : 1;
if (!head)
{
head = entry;
}
else
{
tail = xps_lookup_last_outline_at_level(ctx, doc, head, 1, this_level);
if (this_level > last_level)
tail->down = entry;
else
tail->next = entry;
}
last_level = this_level;
}
}
return head;
}
static fz_outline *
xps_parse_document_structure(fz_context *ctx, xps_document *doc, fz_xml *root)
{
fz_xml *node;
if (fz_xml_is_tag(root, "DocumentStructure"))
{
node = fz_xml_down(root);
if (node && fz_xml_is_tag(node, "DocumentStructure.Outline"))
{
node = fz_xml_down(node);
if (node && fz_xml_is_tag(node, "DocumentOutline"))
return xps_parse_document_outline(ctx, doc, node);
}
}
return NULL;
}
static fz_outline *
xps_load_document_structure(fz_context *ctx, xps_document *doc, xps_fixdoc *fixdoc)
{
xps_part *part;
fz_xml *root = NULL;
fz_outline *outline = NULL;
part = xps_read_part(ctx, doc, fixdoc->outline);
fz_try(ctx)
{
root = fz_parse_xml(ctx, part->data, 0);
}
fz_always(ctx)
{
xps_drop_part(ctx, doc, part);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
if (!root)
return NULL;
fz_try(ctx)
{
outline = xps_parse_document_structure(ctx, doc, root);
}
fz_always(ctx)
{
fz_drop_xml(ctx, root);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
return outline;
}
fz_outline *
xps_load_outline(fz_context *ctx, fz_document *doc_)
{
xps_document *doc = (xps_document*)doc_;
xps_fixdoc *fixdoc;
fz_outline *head = NULL, *tail, *outline = NULL;
for (fixdoc = doc->first_fixdoc; fixdoc; fixdoc = fixdoc->next)
{
if (fixdoc->outline)
{
fz_try(ctx)
{
outline = xps_load_document_structure(ctx, doc, fixdoc);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
outline = NULL;
}
if (!outline)
continue;
if (!head)
head = outline;
else
{
while (tail->next)
tail = tail->next;
tail->next = outline;
}
tail = outline;
}
}
return head;
}
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