From 657abbd245dc777f61314ad476deb821cff0b90a Mon Sep 17 00:00:00 2001
From: Vincent Sanders <vince@kyllikki.org>
Date: Sat, 8 Mar 2014 14:40:09 +0000
Subject: low level source data cache backing store interface.

---
 desktop/gui.h         | 11 ++++++++++-
 desktop/gui_factory.c | 41 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 50 insertions(+), 2 deletions(-)

(limited to 'desktop')

diff --git a/desktop/gui.h b/desktop/gui.h
index c0a5a4e21..24838c9df 100644
--- a/desktop/gui.h
+++ b/desktop/gui.h
@@ -69,6 +69,7 @@ struct hlcache_handle;
 struct download_context;
 struct nsurl;
 struct gui_file_table;
+struct gui_llcache_table;
 
 typedef struct nsnsclipboard_styles {
 	size_t start;			/**< Start of run */
@@ -520,7 +521,6 @@ struct gui_browser_table {
 
 };
 
-
 /**
  * NetSurf operation function table
  *
@@ -572,6 +572,15 @@ struct netsurf_table {
 	 * Provides routines for the interactive text search on a page.
 	 */
 	struct gui_search_table *search;
+
+	/**
+	 * Low level cache table.
+	 *
+	 * Used by the low level cache to push objects to persistant
+	 * storage. The table is optional and may be NULL which
+	 * uses the default implementation.
+	 */
+	struct gui_llcache_table *llcache;
 };
 
 
diff --git a/desktop/gui_factory.c b/desktop/gui_factory.c
index 756f5dd0e..45d9516fa 100644
--- a/desktop/gui_factory.c
+++ b/desktop/gui_factory.c
@@ -17,6 +17,8 @@
  */
 
 #include "content/hlcache.h"
+#include "content/backing_store.h"
+
 #include "desktop/download.h"
 #include "desktop/gui_factory.h"
 #include "utils/file.h"
@@ -25,7 +27,6 @@
 struct netsurf_table *guit = NULL;
 
 
-
 static void gui_default_window_set_title(struct gui_window *g, const char *title)
 {
 }
@@ -400,6 +401,34 @@ static nserror verify_search_register(struct gui_search_table *gst)
 	return NSERROR_OK;
 }
 
+/** verify low level cache persistant backing store table is valid */
+static nserror verify_llcache_register(struct gui_llcache_table *glt)
+{
+	/* check table is present */
+	if (glt == NULL) {
+		return NSERROR_BAD_PARAMETER;
+	}
+
+	/* mandantory operations */
+	if (glt->store == NULL) {
+		return NSERROR_BAD_PARAMETER;
+	}
+	if (glt->fetch == NULL) {
+		return NSERROR_BAD_PARAMETER;
+	}
+	if (glt->invalidate == NULL) {
+		return NSERROR_BAD_PARAMETER;
+	}
+	if (glt->initialise == NULL) {
+		return NSERROR_BAD_PARAMETER;
+	}
+	if (glt->finalise == NULL) {
+		return NSERROR_BAD_PARAMETER;
+	}
+
+	return NSERROR_OK;
+}
+
 static nsurl *gui_default_get_resource_url(const char *path)
 {
 	return NULL;
@@ -622,6 +651,16 @@ nserror gui_factory_register(struct netsurf_table *gt)
 		return err;
 	}
 
+	/* llcache table */
+	if (gt->llcache == NULL) {
+		/* set default backing store table */
+		gt->llcache = null_llcache_table;
+	}
+	err = verify_llcache_register(gt->llcache);
+	if (err != NSERROR_OK) {
+		return err;
+	}
+
 	guit = gt;
 
 	return NSERROR_OK;
-- 
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