diff --git a/content/content.h b/content/content.h
index 169fd5ae3..2b16c5225 100644
--- a/content/content.h
+++ b/content/content.h
@@ -24,14 +24,13 @@
  * The content functions manipulate struct contents, which correspond to URLs.
  */
 
-#ifndef _NETSURF_CONTENT_CONTENT_H_
-#define _NETSURF_CONTENT_CONTENT_H_
+#ifndef NETSURF_CONTENT_CONTENT_H_
+#define NETSURF_CONTENT_CONTENT_H_
 
 #include <libwapcaplet/libwapcaplet.h>
 
-#include "utils/errors.h"
-#include "content/content_factory.h"
 #include "desktop/search.h" /* search flags enum */
+#include "netsurf/content_type.h"
 #include "netsurf/mouse.h" /* mouse state enums */
 #include "netsurf/console.h" /* console state and flags enums */
 
@@ -43,48 +42,8 @@ struct hlcache_handle;
 struct object_params;
 struct rect;
 struct redraw_context;
-struct llcache_query_msg;
 struct cert_chain;
 
-/** Status of a content */
-typedef enum {
-	CONTENT_STATUS_LOADING,	/**< Content is being fetched or
-				  converted and is not safe to display. */
-	CONTENT_STATUS_READY,	/**< Some parts of content still being
-				  loaded, but can be displayed. */
-	CONTENT_STATUS_DONE,	/**< All finished. */
-	CONTENT_STATUS_ERROR	/**< Error occurred, content will be
-				  destroyed imminently. */
-} content_status;
-
-/** Used in callbacks to indicate what has occurred. */
-typedef enum {
-	CONTENT_MSG_LOG,       /**< Content wishes to log something */
-	CONTENT_MSG_SSL_CERTS, /**< Content is from SSL and this is its chain */
-	CONTENT_MSG_LOADING,   /**< fetching or converting */
-	CONTENT_MSG_READY,     /**< may be displayed */
-	CONTENT_MSG_DONE,      /**< finished */
-	CONTENT_MSG_ERROR,     /**< error occurred */
-	CONTENT_MSG_REDIRECT,  /**< fetch url redirect occured */
-	CONTENT_MSG_STATUS,    /**< new status string */
-	CONTENT_MSG_REFORMAT,  /**< content_reformat done */
-	CONTENT_MSG_REDRAW,    /**< needs redraw (eg. new animation frame) */
-	CONTENT_MSG_REFRESH,   /**< wants refresh */
-	CONTENT_MSG_DOWNLOAD,  /**< download, not for display */
-	CONTENT_MSG_LINK,      /**< RFC5988 link */
-	CONTENT_MSG_GETTHREAD, /**< Javascript thread */
-	CONTENT_MSG_GETDIMS,   /**< Get viewport dimensions. */
-	CONTENT_MSG_SCROLL,    /**< Request to scroll content */
-	CONTENT_MSG_DRAGSAVE,  /**< Allow drag saving of content */
-	CONTENT_MSG_SAVELINK,  /**< Allow URL to be saved */
-	CONTENT_MSG_POINTER,   /**< Wants a specific mouse pointer set */
-	CONTENT_MSG_SELECTION, /**< A selection made or cleared */
-	CONTENT_MSG_CARET,     /**< Caret movement / hiding */
-	CONTENT_MSG_DRAG,      /**< A drag started or ended */
-	CONTENT_MSG_SELECTMENU,/**< Create a select menu */
-	CONTENT_MSG_GADGETCLICK/**< A gadget has been clicked on (mainly for file) */
-} content_msg;
-
 
 /** RFC5988 metadata link */
 struct content_rfc5988_link {
@@ -286,114 +245,6 @@ union content_msg_data {
 };
 
 
-/* The following are for hlcache */
-
-/**
- * Destroy and free a content.
- *
- * Calls the destroy function for the content, and frees the structure.
- */
-void content_destroy(struct content *c);
-
-/**
- * Register a user for callbacks.
- *
- * \param c the content to register
- * \param callback the user callback function
- * \param pw callback private data
- * \return true on success, false otherwise on memory exhaustion
- *
- * The callback will be called when content_broadcast() is
- * called with the content.
- */
-bool content_add_user(struct content *h,
-		      void (*callback)(
-				       struct content *c,
-				       content_msg msg,
-				       const union content_msg_data *data,
-				       void *pw),
-		      void *pw);
-
-/**
- * Remove a callback user.
- *
- * The callback function and pw must be identical to those passed to
- * content_add_user().
- *
- * \param c Content to remove user from
- * \param callback passed when added
- * \param ctx Context passed when added
- */
-void content_remove_user(struct content *c,
-			 void (*callback)(
-					  struct content *c,
-					  content_msg msg,
-					  const union content_msg_data *data,
-					  void *pw),
-			 void *ctx);
-
-
-/**
- * Count users for the content.
- *
- * \param c Content to consider
- */
-uint32_t content_count_users(struct content *c);
-
-
-/**
- * Determine if quirks mode matches
- *
- * \param c Content to consider
- * \param quirks  Quirks mode to match
- * \return True if quirks match, false otherwise
- */
-bool content_matches_quirks(struct content *c, bool quirks);
-
-/**
- * Determine if a content is shareable
- *
- * \param c  Content to consider
- * \return True if content is shareable, false otherwise
- */
-bool content_is_shareable(struct content *c);
-
-/**
- * Retrieve the low-level cache handle for a content
- *
- * \note only used by hlcache
- *
- * \param c Content to retrieve from
- * \return Low-level cache handle
- */
-const struct llcache_handle *content_get_llcache_handle(struct content *c);
-
-/**
- * Retrieve URL associated with content
- *
- * \param c  Content to retrieve URL from
- * \return Pointer to URL, or NULL if not found.
- */
-struct nsurl *content_get_url(struct content *c);
-
-/**
- * Clone a content object in its current state.
- *
- * \param c  Content to clone
- * \return Clone of \a c
- */
-struct content *content_clone(struct content *c);
-
-/**
- * Abort a content object
- *
- * \param c The content object to abort
- * \return NSERROR_OK on success, otherwise appropriate error
- */
-nserror content_abort(struct content *c);
-
-/* Client functions */
-
 /**
  * Get whether a content can reformat
  *
diff --git a/content/content_factory.h b/content/content_factory.h
index 9beeb193c..354a1789f 100644
--- a/content/content_factory.h
+++ b/content/content_factory.h
@@ -46,13 +46,12 @@ nserror HNAME##_init(void)						\
 
 struct content;
 struct llcache_handle;
-
-typedef struct content_handler content_handler;
+struct content_handler;
 
 void content_factory_fini(void);
 
 nserror content_factory_register_handler(const char *mime_type,
-		const content_handler *handler);
+		const struct content_handler *handler);
 
 struct content *content_factory_create_content(struct llcache_handle *llcache, 
 		const char *fallback_charset, bool quirks,
diff --git a/content/content_protected.h b/content/content_protected.h
index 3b6d1f7d3..314a0a9a3 100644
--- a/content/content_protected.h
+++ b/content/content_protected.h
@@ -28,15 +28,24 @@
 #define NETSURF_CONTENT_CONTENT_PROTECTED_H_
 
 #include <stdio.h>
+#include <libwapcaplet/libwapcaplet.h>
 
 #include "netsurf/content_type.h"
-#include "content/content.h"
+#include "desktop/search.h" /* search flags enum */
+#include "netsurf/mouse.h" /* mouse state enums */
 
 struct nsurl;
 struct content_redraw_data;
+union content_msg_data;
 struct http_parameter;
 struct llcache_handle;
 struct object_params;
+struct content;
+struct redraw_context;
+struct rect;
+struct browser_window_features;
+
+typedef struct content_handler content_handler;
 
 /**
  * Content operation function table
@@ -457,4 +466,108 @@ const char *content__get_encoding(struct content *c, enum content_encoding_type
  */
 bool content__is_locked(struct content *c);
 
+/**
+ * Destroy and free a content.
+ *
+ * Calls the destroy function for the content, and frees the structure.
+ */
+void content_destroy(struct content *c);
+
+/**
+ * Register a user for callbacks.
+ *
+ * \param c the content to register
+ * \param callback the user callback function
+ * \param pw callback private data
+ * \return true on success, false otherwise on memory exhaustion
+ *
+ * The callback will be called when content_broadcast() is
+ * called with the content.
+ */
+bool content_add_user(struct content *h,
+		      void (*callback)(
+				       struct content *c,
+				       content_msg msg,
+				       const union content_msg_data *data,
+				       void *pw),
+		      void *pw);
+
+/**
+ * Remove a callback user.
+ *
+ * The callback function and pw must be identical to those passed to
+ * content_add_user().
+ *
+ * \param c Content to remove user from
+ * \param callback passed when added
+ * \param ctx Context passed when added
+ */
+void content_remove_user(struct content *c,
+			 void (*callback)(
+					  struct content *c,
+					  content_msg msg,
+					  const union content_msg_data *data,
+					  void *pw),
+			 void *ctx);
+
+
+/**
+ * Count users for the content.
+ *
+ * \param c Content to consider
+ */
+uint32_t content_count_users(struct content *c);
+
+
+/**
+ * Determine if quirks mode matches
+ *
+ * \param c Content to consider
+ * \param quirks  Quirks mode to match
+ * \return True if quirks match, false otherwise
+ */
+bool content_matches_quirks(struct content *c, bool quirks);
+
+/**
+ * Determine if a content is shareable
+ *
+ * \param c  Content to consider
+ * \return True if content is shareable, false otherwise
+ */
+bool content_is_shareable(struct content *c);
+
+/**
+ * Retrieve the low-level cache handle for a content
+ *
+ * \note only used by hlcache
+ *
+ * \param c Content to retrieve from
+ * \return Low-level cache handle
+ */
+const struct llcache_handle *content_get_llcache_handle(struct content *c);
+
+/**
+ * Retrieve URL associated with content
+ *
+ * \param c  Content to retrieve URL from
+ * \return Pointer to URL, or NULL if not found.
+ */
+struct nsurl *content_get_url(struct content *c);
+
+/**
+ * Clone a content object in its current state.
+ *
+ * \param c  Content to clone
+ * \return Clone of \a c
+ */
+struct content *content_clone(struct content *c);
+
+/**
+ * Abort a content object
+ *
+ * \param c The content object to abort
+ * \return NSERROR_OK on success, otherwise appropriate error
+ */
+nserror content_abort(struct content *c);
+
 #endif
diff --git a/content/handlers/css/css.c b/content/handlers/css/css.c
index af2a9bc88..6bdc124e2 100644
--- a/content/handlers/css/css.c
+++ b/content/handlers/css/css.c
@@ -20,15 +20,17 @@
 #include <libwapcaplet/libwapcaplet.h>
 #include <dom/dom.h>
 
-#include "content/content_protected.h"
-#include "content/fetch.h"
-#include "content/hlcache.h"
-#include "desktop/system_colour.h"
+#include "utils/errors.h"
 #include "utils/corestrings.h"
 #include "utils/utils.h"
 #include "utils/http.h"
 #include "utils/log.h"
 #include "utils/messages.h"
+#include "content/content_protected.h"
+#include "content/content_factory.h"
+#include "content/fetch.h"
+#include "content/hlcache.h"
+#include "desktop/system_colour.h"
 
 #include "css/css.h"
 #include "css/hints.h"
diff --git a/content/handlers/html/box_special.c b/content/handlers/html/box_special.c
index a369ec8ce..23cfeec0b 100644
--- a/content/handlers/html/box_special.c
+++ b/content/handlers/html/box_special.c
@@ -40,6 +40,7 @@
 #include "netsurf/plot_style.h"
 #include "css/hints.h"
 #include "desktop/frame_types.h"
+#include "content/content_factory.h"
 
 #include "html/html.h"
 #include "html/private.h"
diff --git a/content/handlers/html/dom_event.c b/content/handlers/html/dom_event.c
index 08a1e45f2..b702cb304 100644
--- a/content/handlers/html/dom_event.c
+++ b/content/handlers/html/dom_event.c
@@ -22,12 +22,14 @@
  * Implementation of HTML content DOM event handling.
  */
 
+#include "utils/config.h"
 #include "utils/corestrings.h"
 #include "utils/nsoption.h"
 #include "utils/log.h"
 #include "utils/ascii.h"
 #include "utils/string.h"
 #include "utils/nsurl.h"
+#include "content/content.h"
 #include "javascript/js.h"
 
 #include "html/private.h"
diff --git a/content/handlers/html/html.c b/content/handlers/html/html.c
index 0e13b9407..af06431bf 100644
--- a/content/handlers/html/html.c
+++ b/content/handlers/html/html.c
@@ -48,6 +48,7 @@
 #include "netsurf/layout.h"
 #include "netsurf/misc.h"
 #include "content/hlcache.h"
+#include "content/content_factory.h"
 #include "desktop/selection.h"
 #include "desktop/scrollbar.h"
 #include "desktop/textarea.h"
diff --git a/content/handlers/html/layout.c b/content/handlers/html/layout.c
index b87fd16c4..ddf1d1632 100644
--- a/content/handlers/html/layout.c
+++ b/content/handlers/html/layout.c
@@ -52,6 +52,7 @@
 #include "netsurf/content.h"
 #include "netsurf/browser_window.h"
 #include "netsurf/layout.h"
+#include "content/content.h"
 #include "content/content_protected.h"
 #include "css/utils.h"
 #include "desktop/scrollbar.h"
diff --git a/content/handlers/html/redraw.c b/content/handlers/html/redraw.c
index fa4cd954d..936c1b333 100644
--- a/content/handlers/html/redraw.c
+++ b/content/handlers/html/redraw.c
@@ -45,6 +45,7 @@
 #include "netsurf/plotters.h"
 #include "netsurf/bitmap.h"
 #include "netsurf/layout.h"
+#include "content/content.h"
 #include "content/content_protected.h"
 #include "css/utils.h"
 #include "desktop/selection.h"
diff --git a/content/handlers/html/script.c b/content/handlers/html/script.c
index faab08ba6..962386d68 100644
--- a/content/handlers/html/script.c
+++ b/content/handlers/html/script.c
@@ -36,6 +36,7 @@
 #include "netsurf/content.h"
 #include "javascript/js.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/fetch.h"
 #include "content/hlcache.h"
 
diff --git a/content/handlers/image/bmp.c b/content/handlers/image/bmp.c
index 448728ede..a1a6ce686 100644
--- a/content/handlers/image/bmp.c
+++ b/content/handlers/image/bmp.c
@@ -33,6 +33,7 @@
 #include "netsurf/content.h"
 #include "content/llcache.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "desktop/gui_internal.h"
 
 #include "image/bmp.h"
@@ -87,10 +88,14 @@ static nserror nsbmp_create_bmp_data(nsbmp_content *bmp)
 	return NSERROR_OK;
 }
 
-static nserror nsbmp_create(const content_handler *handler,
-		lwc_string *imime_type, const struct http_parameter *params,
-		llcache_handle *llcache, const char *fallback_charset,
-		bool quirks, struct content **c)
+static nserror
+nsbmp_create(const struct content_handler *handler,
+	     lwc_string *imime_type,
+	     const struct http_parameter *params,
+	     llcache_handle *llcache,
+	     const char *fallback_charset,
+	     bool quirks,
+	     struct content **c)
 {
 	nsbmp_content *bmp;
 	nserror error;
diff --git a/content/handlers/image/gif.c b/content/handlers/image/gif.c
index fa09f401c..6ef4fa7e7 100644
--- a/content/handlers/image/gif.c
+++ b/content/handlers/image/gif.c
@@ -43,7 +43,9 @@
 #include "netsurf/bitmap.h"
 #include "netsurf/content.h"
 #include "content/llcache.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "desktop/gui_internal.h"
 
 #include "image/image.h"
diff --git a/content/handlers/image/ico.c b/content/handlers/image/ico.c
index fdaff829a..312127869 100644
--- a/content/handlers/image/ico.c
+++ b/content/handlers/image/ico.c
@@ -32,6 +32,7 @@
 #include "netsurf/content.h"
 #include "content/llcache.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "desktop/gui_internal.h"
 
 #include "image/image.h"
diff --git a/content/handlers/image/jpeg.c b/content/handlers/image/jpeg.c
index 9df084b74..09e68fd29 100644
--- a/content/handlers/image/jpeg.c
+++ b/content/handlers/image/jpeg.c
@@ -33,7 +33,9 @@
 #include "utils/messages.h"
 #include "netsurf/bitmap.h"
 #include "content/llcache.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "desktop/gui_internal.h"
 
 #include "image/image_cache.h"
diff --git a/content/handlers/image/png.c b/content/handlers/image/png.c
index cf8e780d6..1fa707d35 100644
--- a/content/handlers/image/png.c
+++ b/content/handlers/image/png.c
@@ -29,6 +29,7 @@
 #include "netsurf/bitmap.h"
 #include "content/llcache.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "desktop/gui_internal.h"
 
 #include "image/image_cache.h"
diff --git a/content/handlers/image/rsvg.c b/content/handlers/image/rsvg.c
index c7cb6257e..5cf900dac 100644
--- a/content/handlers/image/rsvg.c
+++ b/content/handlers/image/rsvg.c
@@ -49,6 +49,7 @@
 #include "netsurf/content.h"
 #include "content/llcache.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "desktop/gui_internal.h"
 
 #include "image/rsvg.h"
diff --git a/content/handlers/image/svg.c b/content/handlers/image/svg.c
index 6194389bf..895d799df 100644
--- a/content/handlers/image/svg.c
+++ b/content/handlers/image/svg.c
@@ -34,6 +34,7 @@
 #include "netsurf/plotters.h"
 #include "netsurf/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 
 #include "image/svg.h"
 
diff --git a/content/handlers/javascript/content.c b/content/handlers/javascript/content.c
index 2cb5ecd6f..9f37e126c 100644
--- a/content/handlers/javascript/content.c
+++ b/content/handlers/javascript/content.c
@@ -26,8 +26,10 @@
 #include <stdbool.h>
 #include <stdlib.h>
 
+#include "utils/errors.h"
 #include "utils/config.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/hlcache.h"
 #include "utils/log.h"
 #include "utils/messages.h"
diff --git a/content/handlers/text/textplain.c b/content/handlers/text/textplain.c
index 86122ff73..e9037f9ba 100644
--- a/content/handlers/text/textplain.c
+++ b/content/handlers/text/textplain.c
@@ -45,6 +45,7 @@
 #include "netsurf/plotters.h"
 #include "netsurf/layout.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/hlcache.h"
 #include "css/utils.h"
 #include "utils/nsoption.h"
diff --git a/content/hlcache.c b/content/hlcache.c
index 23dbc5706..2e15edd56 100644
--- a/content/hlcache.c
+++ b/content/hlcache.c
@@ -38,6 +38,7 @@
 #include "content/hlcache.h"
 // Note, this is *ONLY* so that we can abort cleanly during shutdown of the cache
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 
 typedef struct hlcache_entry hlcache_entry;
 typedef struct hlcache_retrieval_ctx hlcache_retrieval_ctx;
diff --git a/desktop/search.c b/desktop/search.c
index 3d3e7704f..c4b5b3535 100644
--- a/desktop/search.c
+++ b/desktop/search.c
@@ -23,6 +23,7 @@
  * Free text search (core)
  */
 
+#include "utils/errors.h"
 #include "content/content.h"
 #include "netsurf/types.h"
 #include "netsurf/browser_window.h"
diff --git a/desktop/textinput.c b/desktop/textinput.c
index e19fb61d2..b8dced689 100644
--- a/desktop/textinput.c
+++ b/desktop/textinput.c
@@ -33,14 +33,13 @@
 #include "utils/talloc.h"
 #include "utils/utf8.h"
 #include "utils/utils.h"
+#include "netsurf/types.h"
 #include "netsurf/mouse.h"
 #include "netsurf/form.h"
 #include "netsurf/window.h"
 #include "netsurf/browser_window.h"
 #include "netsurf/keypress.h"
-#include "html/box.h"
-#include "html/private.h"
-#include "html/layout.h"
+#include "content/content.h"
 
 #include "desktop/browser_private.h"
 #include "desktop/textinput.h"
diff --git a/frontends/amiga/dt_anim.c b/frontends/amiga/dt_anim.c
index 70f7e6ba6..99ccffe32 100644
--- a/frontends/amiga/dt_anim.c
+++ b/frontends/amiga/dt_anim.c
@@ -40,7 +40,9 @@
 #include "netsurf/plotters.h"
 #include "netsurf/bitmap.h"
 #include "netsurf/content.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/llcache.h"
 
 #include "amiga/bitmap.h"
diff --git a/frontends/amiga/dt_picture.c b/frontends/amiga/dt_picture.c
index 3b2b942b0..2e5d1555b 100644
--- a/frontends/amiga/dt_picture.c
+++ b/frontends/amiga/dt_picture.c
@@ -36,7 +36,9 @@
 #include "netsurf/plotters.h"
 #include "netsurf/bitmap.h"
 #include "content/llcache.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/handlers/image/image_cache.h"
 
 #include "amiga/bitmap.h"
diff --git a/frontends/amiga/dt_sound.c b/frontends/amiga/dt_sound.c
index e0a794fa9..e0081039e 100644
--- a/frontends/amiga/dt_sound.c
+++ b/frontends/amiga/dt_sound.c
@@ -36,6 +36,7 @@
 #include "html/box.h"
 #include "content/llcache.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 
 #include "amiga/filetype.h"
 #include "amiga/datatypes.h"
diff --git a/frontends/amiga/file.c b/frontends/amiga/file.c
index 67866aa48..2fe7d6635 100644
--- a/frontends/amiga/file.c
+++ b/frontends/amiga/file.c
@@ -29,6 +29,7 @@
 #include "utils/nsurl.h"
 #include "netsurf/browser_window.h"
 #include "netsurf/content.h"
+#include "content/content_factory.h"
 #include "desktop/save_complete.h"
 #include "desktop/save_pdf.h"
 #include "desktop/save_text.h"
diff --git a/frontends/amiga/icon.c b/frontends/amiga/icon.c
index 914ab65f2..353ba9196 100644
--- a/frontends/amiga/icon.c
+++ b/frontends/amiga/icon.c
@@ -45,7 +45,9 @@
 #include "netsurf/plotters.h"
 #include "netsurf/bitmap.h"
 #include "netsurf/content.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 
 #include "amiga/os3support.h"
 #include "amiga/bitmap.h"
diff --git a/frontends/amiga/plugin_hack.c b/frontends/amiga/plugin_hack.c
index 5d7ec19c1..fa75bd910 100644
--- a/frontends/amiga/plugin_hack.c
+++ b/frontends/amiga/plugin_hack.c
@@ -35,6 +35,7 @@
 #include "amiga/filetype.h"
 #include "amiga/plugin_hack.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/llcache.h"
 
 
diff --git a/frontends/riscos/content-handlers/artworks.c b/frontends/riscos/content-handlers/artworks.c
index eecb0f8ab..0227603d9 100644
--- a/frontends/riscos/content-handlers/artworks.c
+++ b/frontends/riscos/content-handlers/artworks.c
@@ -38,7 +38,9 @@
 #include "utils/utils.h"
 #include "netsurf/plotters.h"
 #include "netsurf/content.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/llcache.h"
 
 #include "riscos/content-handlers/artworks.h"
diff --git a/frontends/riscos/content-handlers/draw.c b/frontends/riscos/content-handlers/draw.c
index 870e33be3..522d5d3fe 100644
--- a/frontends/riscos/content-handlers/draw.c
+++ b/frontends/riscos/content-handlers/draw.c
@@ -35,7 +35,9 @@
 #include "utils/utils.h"
 #include "netsurf/plotters.h"
 #include "netsurf/content.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 #include "content/llcache.h"
 
 #include "riscos/content-handlers/draw.h"
diff --git a/frontends/riscos/content-handlers/sprite.c b/frontends/riscos/content-handlers/sprite.c
index 86749096f..f6ab68451 100644
--- a/frontends/riscos/content-handlers/sprite.c
+++ b/frontends/riscos/content-handlers/sprite.c
@@ -36,7 +36,9 @@
 #include "netsurf/plotters.h"
 #include "netsurf/content.h"
 #include "content/llcache.h"
+#include "content/content.h"
 #include "content/content_protected.h"
+#include "content/content_factory.h"
 
 #include "riscos/gui.h"
 #include "riscos/image.h"
diff --git a/include/netsurf/content_type.h b/include/netsurf/content_type.h
index ef654cd70..b6bc5c218 100644
--- a/include/netsurf/content_type.h
+++ b/include/netsurf/content_type.h
@@ -18,7 +18,7 @@
 
 /**
  * \file
- * Declaration of content type enumerations.
+ * Declaration of content enumerations.
  *
  * The content enumerations are defined here.
  */
@@ -28,17 +28,27 @@
 
 /** Debugging dump operations */
 enum content_debug {
-	CONTENT_DEBUG_RENDER, /** Debug the contents rendering. */
-	CONTENT_DEBUG_DOM,    /** Debug the contents Document Object. */
-	CONTENT_DEBUG_REDRAW  /** Debug redraw operations. */
+	/** Debug the contents rendering. */
+	CONTENT_DEBUG_RENDER,
+
+	/** Debug the contents Document Object. */
+	CONTENT_DEBUG_DOM,
+
+	/** Debug redraw operations. */
+	CONTENT_DEBUG_REDRAW
 };
 
+
 /** Content encoding information types */
 enum content_encoding_type {
-	CONTENT_ENCODING_NORMAL, /** The content encoding */
-	CONTENT_ENCODING_SOURCE  /** The content encoding source */
+	/** The content encoding */
+	CONTENT_ENCODING_NORMAL,
+
+	/** The content encoding source */
+	CONTENT_ENCODING_SOURCE
 };
 
+
 /** The type of a content. */
 typedef enum {
 	/** no type for content */
@@ -73,4 +83,98 @@ typedef enum {
 } content_type;
 
 
+/** Status of a content */
+typedef enum {
+	/** Content is being fetched or converted and is not safe to display. */
+	CONTENT_STATUS_LOADING,
+
+	/** Some parts of content still being loaded, but can be displayed. */
+	CONTENT_STATUS_READY,
+
+	/** Content has completed all processing. */
+	CONTENT_STATUS_DONE,
+
+	/** Error occurred, content will be destroyed imminently. */
+	CONTENT_STATUS_ERROR
+} content_status;
+
+
+/**
+ * Used in callbacks to indicate what has occurred.
+ */
+typedef enum {
+	/** Content wishes to log something */
+	CONTENT_MSG_LOG,
+
+	/** Content is from SSL and this is its chain */
+	CONTENT_MSG_SSL_CERTS,
+
+	/** fetching or converting */
+	CONTENT_MSG_LOADING,
+
+	/** may be displayed */
+	CONTENT_MSG_READY,
+
+	/** content has finished processing */
+	CONTENT_MSG_DONE,
+
+	/** error occurred */
+	CONTENT_MSG_ERROR,
+
+	/** fetch url redirect occured */
+	CONTENT_MSG_REDIRECT,
+
+	/** new status string */
+	CONTENT_MSG_STATUS,
+
+	/** content_reformat done */
+	CONTENT_MSG_REFORMAT,
+
+	/** needs redraw (eg. new animation frame) */
+	CONTENT_MSG_REDRAW,
+
+	/** wants refresh */
+	CONTENT_MSG_REFRESH,
+
+	/** download, not for display */
+	CONTENT_MSG_DOWNLOAD,
+
+	/** RFC5988 link */
+	CONTENT_MSG_LINK,
+
+	/** Javascript thread */
+	CONTENT_MSG_GETTHREAD,
+
+	/** Get viewport dimensions. */
+	CONTENT_MSG_GETDIMS,
+
+	/** Request to scroll content */
+	CONTENT_MSG_SCROLL,
+
+	/** Allow drag saving of content */
+	CONTENT_MSG_DRAGSAVE,
+
+	/** Allow URL to be saved */
+	CONTENT_MSG_SAVELINK,
+
+	/** Wants a specific mouse pointer set */
+	CONTENT_MSG_POINTER,
+
+	/** A selection made or cleared */
+	CONTENT_MSG_SELECTION,
+
+	/** Caret movement / hiding */
+	CONTENT_MSG_CARET,
+
+	/** A drag started or ended */
+	CONTENT_MSG_DRAG,
+
+	/** Create a select menu */
+	CONTENT_MSG_SELECTMENU,
+
+	/** A gadget has been clicked on (mainly for file) */
+	CONTENT_MSG_GADGETCLICK
+} content_msg;
+
+
 #endif