Hotlist: Allow hotlist initilialisation without hotlist corewindow.

Now, hotlist_init can be called without a corewindow.  This allows the
hotlist backend to be up and running, before any hostlist manager is
opened.  Calling hotlist_manager_init attaches the hotlist to a corewindow.

desktop/hotlist.c

@@ -1227,8 +1227,7 @@ static nserror hotlist_populate(const char *path)
 
 
 /* Exported interface, documented in hotlist.h */
-nserror hotlist_init(struct core_window_callback_table *cw_t,
-		void *core_window_handle, const char *path)
+nserror hotlist_init(const char *path)
 {
 	nserror err;
 
@@ -1252,8 +1251,7 @@ nserror hotlist_init(struct core_window_callback_table *cw_t,
 
 	/* Create the hotlist treeview */
 	err = treeview_create(&hl_ctx.tree, &hl_tree_cb_t,
-			HL_N_FIELDS, hl_ctx.fields,
-			cw_t, core_window_handle,
+			HL_N_FIELDS, hl_ctx.fields, NULL, NULL,
 			TREEVIEW_NO_FLAGS);
 	if (err != NSERROR_OK) {
 		hl_ctx.tree = NULL;
@@ -1271,10 +1269,41 @@ nserror hotlist_init(struct core_window_callback_table *cw_t,
 	 * the treeview is built. */
 	hl_ctx.built = true;
 
+	LOG("Loaded hotlist");
+
+	return NSERROR_OK;
+}
+
+
+/* Exported interface, documented in hotlist.h */
+nserror hotlist_manager_init(struct core_window_callback_table *cw_t,
+		void *core_window_handle)
+{
+	nserror err;
+
+	/* Create the hotlist treeview */
+	err = treeview_cw_attach(hl_ctx.tree, cw_t, core_window_handle);
+	if (err != NSERROR_OK) {
+		return err;
+	}
+
 	/* Inform client of window height */
 	treeview_get_height(hl_ctx.tree);
 
-	LOG("Loaded hotlist");
+	return NSERROR_OK;
+}
+
+
+/* Exported interface, documented in hotlist.h */
+nserror hotlist_manager_fini(void)
+{
+	nserror err;
+
+	/* Create the hotlist treeview */
+	err = treeview_cw_detach(hl_ctx.tree);
+	if (err != NSERROR_OK) {
+		return err;
+	}
 
 	return NSERROR_OK;
 }

desktop/hotlist.h

@@ -33,18 +33,44 @@ struct rect;
 /**
  * Initialise the hotlist.
  *
- * This opens the hotlist file, generating the hotlist data, and creates a
+ * This opens the hotlist file, construct the hostlist, and creates a
  * treeview.  If there's no hotlist file, it generates a default hotlist.
  *
- * This must be called before any other hotlist_* function.
+ * This must be called before any other hotlist_* function.  It must
+ * be called before URLs can be added to the hotlist, and before the
+ * hotlist can be queried to ask if URLs are present in the hotlist.
  *
- * \param cw_t Callback table for core_window containing the treeview
- * \param core_window_handle The handle in which the treeview is shown
  * \param path The path to hotlist file to load
  * \return NSERROR_OK on success, appropriate error otherwise
  */
-nserror hotlist_init(struct core_window_callback_table *cw_t,
-		void *core_window_handle, const char *path);
+nserror hotlist_init(const char *path);
+
+/**
+ * Initialise the hotlist manager.
+ *
+ * This connects the underlying hotlist treeview to a corewindow for display.
+ *
+ * The provided core window handle must be valid until hotlist_fini is called.
+ *
+ * \param cw_t Callback table for core_window containing the treeview
+ * \param core_window_handle The handle in which the treeview is shown
+ * \return NSERROR_OK on success, appropriate error otherwise
+ */
+nserror hotlist_manager_init(struct core_window_callback_table *cw_t,
+		void *core_window_handle);
+
+
+/**
+ * Finalise the hotlist manager.
+ *
+ * This simply disconnects the underlying treeview from its corewindow,
+ * allowing destruction of a GUI hotlist window, without finalising the
+ * hotlist module.
+ *
+ * \param path		The path to save hotlist to
+ * \return NSERROR_OK on success, appropriate error otherwise
+ */
+nserror hotlist_manager_fini(void);
 
 /**
  * Finalise the hotlist.