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diff --git a/content/handlers/html/object.h b/content/handlers/html/object.h
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+/*
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * HTML content object interface
+ */
+
+#ifndef NETSURF_HTML_OBJECT_H
+#define NETSURF_HTML_OBJECT_H
+
+struct html_content;
+struct browser_window;
+struct box;
+
+/**
+ * Start a fetch for an object required by a page.
+ *
+ * The created content object is added to the HTML content which is
+ *  updated as the fetch progresses. The box (if any) is updated when
+ *  the object content becomes done.
+ *
+ * \param c content of type CONTENT_HTML
+ * \param url URL of object to fetch
+ * \param box box that will contain the object or NULL if none
+ * \param permitted_types bitmap of acceptable types
+ * \param background this is a background image
+ * \return true on success, false on memory exhaustion
+ */
+bool html_fetch_object(struct html_content *c, nsurl *url, struct box *box, content_type permitted_types, bool background);
+
+/**
+ * release memory of content objects associated with a HTML content
+ *
+ * The content objects contents should have been previously closed
+ *  with html_object_close_objects().
+ *
+ * \param html The html content to release the objects from.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_free_objects(struct html_content *html);
+
+/**
+ * close content of content objects associated with a HTML content
+ *
+ * \param html The html content to close the objects from.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_close_objects(struct html_content *html);
+
+
+/**
+ * open content of content objects associated with a HTML content
+ *
+ * \param html The html content to open the objects from.
+ * \param bw Browser window handle to open contents with.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_open_objects(struct html_content *html, struct browser_window *bw);
+
+
+/**
+ * abort any content objects that have not completed fetching.
+ *
+ * \param html The html content to abort the objects from.
+ * \return NSERROR_OK on success else appropriate error code.
+ */
+nserror html_object_abort_objects(struct html_content *html);
+
+#endif