void
pdf_insert_page(pdf_document *doc, pdf_page *page, int at)
{
fz_context *ctx = doc->ctx;
int count = pdf_count_pages(doc);
pdf_obj *parent, *kids;
pdf_obj *page_ref;
int i;
page_ref = pdf_new_ref(doc, page->me);
fz_try(ctx)
{
if (count == 0)
{
/* TODO: create new page tree? */
fz_throw(ctx, FZ_ERROR_GENERIC, "empty page tree, cannot insert page");
}
else if (at >= count)
{
if (at > count)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot insert page beyond end of page tree");
/* append after last page */
pdf_lookup_page_loc(doc, count - 1, &parent, &i);
kids = pdf_dict_gets(parent, "Kids");
pdf_array_insert(kids, page_ref, i + 1);
}
else
{
/* insert before found page */
pdf_lookup_page_loc(doc, at, &parent, &i);
kids = pdf_dict_gets(parent, "Kids");
pdf_array_insert(kids, page_ref, i);
}
pdf_dict_puts(page->me, "Parent", parent);
/* Adjust page counts */
while (parent)
{
int count = pdf_to_int(pdf_dict_gets(parent, "Count"));
pdf_dict_puts_drop(parent, "Count", pdf_new_int(doc, count + 1));
parent = pdf_dict_gets(parent, "Parent");
}
}
fz_always(ctx)
{
pdf_drop_obj(page_ref);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static int
pdf_name_tree_insert(fz_context *ctx, pdf_document *doc, pdf_obj *tree, pdf_obj *key, pdf_obj *val)
{
find_data data;
pdf_obj *names, *limits, *limit0, *limit1;
data.key = key;
data.found = NULL;
data.found_index = 0;
data.last = NULL;
data.last_index = 0;
data.entry = 0;
pdf_name_tree_map(ctx, tree, find_position, &data);
if (!data.found)
{
data.found = data.last;
data.found_index = data.last_index;
}
if (!data.found)
{
/* Completely empty name tree! */
pdf_dict_put_drop(ctx, tree, PDF_NAME_Names, pdf_new_array(ctx, doc, 2));
pdf_dict_put_drop(ctx, tree, PDF_NAME_Limits, pdf_new_array(ctx, doc, 2));
data.found = tree;
data.found_index = 0;
}
names = pdf_dict_get(ctx, data.found, PDF_NAME_Names);
if (names == NULL)
pdf_dict_put_drop(ctx, data.found, PDF_NAME_Names, (names = pdf_new_array(ctx, doc, 2)));
pdf_array_insert(ctx, names, key, 2*data.found_index);
pdf_array_insert(ctx, names, val, 2*data.found_index+1);
limits = pdf_dict_get(ctx, data.found, PDF_NAME_Limits);
if (limits == NULL)
pdf_dict_put_drop(ctx, data.found, PDF_NAME_Limits, (limits = pdf_new_array(ctx, doc, 2)));
limit0 = pdf_array_get(ctx, limits, 0);
limit1 = pdf_array_get(ctx, limits, 1);
if (!pdf_is_string(ctx, limit0) || data.found_index == 0)
pdf_array_put(ctx, limits, 0, key);
if (!pdf_is_string(ctx, limit1) || 2 * (data.found_index+1) == pdf_array_len(ctx, limits))
pdf_array_put(ctx, limits, 1, key);
return data.entry;
}
void
pdf_array_insert_drop(fz_context *ctx, pdf_obj *obj, pdf_obj *item, int i)
{
fz_try(ctx)
pdf_array_insert(ctx, obj, item, i);
fz_always(ctx)
pdf_drop_obj(ctx, item);
fz_catch(ctx)
fz_rethrow(ctx);
}
void
pdf_array_insert_drop(fz_context *ctx, pdf_obj *obj, pdf_obj *item, int i)
{
RESOLVE(obj);
if (obj >= PDF_OBJ__LIMIT)
{
fz_try(ctx)
pdf_array_insert(ctx, obj, item, i);
fz_always(ctx)
pdf_drop_obj(ctx, item);
fz_catch(ctx)
fz_rethrow(ctx);
}
}
void
pdf_insert_page(pdf_document *doc, pdf_page *page, int at)
{
fz_context *ctx = doc->ctx;
int count = pdf_count_pages(doc);
pdf_obj *parent, *kids;
pdf_obj *page_ref;
int i;
page_ref = pdf_new_ref(doc, page->me);
fz_try(ctx)
{
if (count == 0)
{
pdf_obj *root = pdf_dict_gets(pdf_trailer(doc), "Root");
parent = pdf_dict_gets(root, "Pages");
if (!parent)
fz_throw(doc->ctx, FZ_ERROR_GENERIC, "cannot find page tree");
kids = pdf_dict_gets(parent, "Kids");
if (!kids)
fz_throw(doc->ctx, FZ_ERROR_GENERIC, "malformed page tree");
pdf_array_insert(kids, page_ref, 0);
}
else if (at >= count)
{
if (at == INT_MAX)
at = count;
if (at > count)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot insert page beyond end of page tree");
/* append after last page */
pdf_lookup_page_loc(doc, count - 1, &parent, &i);
kids = pdf_dict_gets(parent, "Kids");
pdf_array_insert(kids, page_ref, i + 1);
}
else
{
/* insert before found page */
pdf_lookup_page_loc(doc, at, &parent, &i);
kids = pdf_dict_gets(parent, "Kids");
pdf_array_insert(kids, page_ref, i);
}
pdf_dict_puts(page->me, "Parent", parent);
/* Adjust page counts */
while (parent)
{
int count = pdf_to_int(pdf_dict_gets(parent, "Count"));
pdf_dict_puts_drop(parent, "Count", pdf_new_int(doc, count + 1));
parent = pdf_dict_gets(parent, "Parent");
}
}
fz_always(ctx)
{
pdf_drop_obj(page_ref);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
doc->page_count = 0; /* invalidate cached value */
}
