gecko/toolkit/components/places/nsPlacesTriggers.h

163 lines
6.4 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Places code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Shawn Wilsher <me@shawnwilsher.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsPlacesTables.h"
#ifndef __nsPlacesTriggers_h__
#define __nsPlacesTriggers_h__
/**
* Exclude these visit types:
* 0 - invalid
* 4 - EMBED
* 7 - DOWNLOAD
* 7 - FRAMED_LINK
**/
#define EXCLUDED_VISIT_TYPES "0, 4, 7, 8"
/**
* This triggers update visit_count and last_visit_date based on historyvisits
* table changes.
*/
#define CREATE_HISTORYVISITS_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_historyvisits_afterinsert_v2_trigger " \
"AFTER INSERT ON moz_historyvisits FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places SET " \
"visit_count = visit_count + (SELECT NEW.visit_type NOT IN (" EXCLUDED_VISIT_TYPES ")), "\
"last_visit_date = MAX(IFNULL(last_visit_date, 0), NEW.visit_date) " \
"WHERE id = NEW.place_id;" \
"END" \
)
#define CREATE_HISTORYVISITS_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_historyvisits_afterdelete_v2_trigger " \
"AFTER DELETE ON moz_historyvisits FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places SET " \
"visit_count = visit_count - (SELECT OLD.visit_type NOT IN (" EXCLUDED_VISIT_TYPES ")), "\
"last_visit_date = (SELECT visit_date FROM moz_historyvisits " \
"WHERE place_id = OLD.place_id " \
"ORDER BY visit_date DESC LIMIT 1) " \
"WHERE id = OLD.place_id;" \
"END" \
)
/**
* These triggers update the hostnames table whenever moz_places changes.
*/
#define CREATE_PLACES_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterinsert_trigger " \
"AFTER INSERT ON moz_places FOR EACH ROW " \
"WHEN LENGTH(NEW.rev_host) > 1 " \
"BEGIN " \
"INSERT OR REPLACE INTO moz_hosts (id, host, frecency, typed) " \
"VALUES (" \
"(SELECT id FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), " \
"fixup_url(get_unreversed_host(NEW.rev_host)), " \
"MAX((SELECT frecency FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), NEW.frecency), " \
"MAX(IFNULL((SELECT typed FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), 0), NEW.typed) " \
"); " \
"END" \
)
#define CREATE_PLACES_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterdelete_trigger " \
"AFTER DELETE ON moz_places FOR EACH ROW " \
"BEGIN " \
"DELETE FROM moz_hosts " \
"WHERE host = fixup_url(get_unreversed_host(OLD.rev_host)) " \
"AND NOT EXISTS(" \
"SELECT 1 FROM moz_places " \
"WHERE rev_host = get_unreversed_host(host || '.') || '.' " \
"OR rev_host = get_unreversed_host(host || '.') || '.www.' " \
"); " \
"END" \
)
// For performance reasons the host frecency is updated only when the page
// frecency changes by a meaningful percentage. This is because the frecency
// decay algorithm requires to update all the frecencies at once, causing a
// too high overhead, while leaving the ordering unchanged.
#define CREATE_PLACES_AFTERUPDATE_FRECENCY_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterupdate_frecency_trigger " \
"AFTER UPDATE OF frecency ON moz_places FOR EACH ROW " \
"WHEN NEW.frecency >= 0 " \
"AND ABS(" \
"IFNULL((NEW.frecency - OLD.frecency) / CAST(NEW.frecency AS REAL), " \
"(NEW.frecency - OLD.frecency))" \
") > .05 " \
"BEGIN " \
"UPDATE moz_hosts " \
"SET frecency = (SELECT MAX(frecency) FROM moz_places " \
"WHERE rev_host = get_unreversed_host(host || '.') || '.' " \
"OR rev_host = get_unreversed_host(host || '.') || '.www.') " \
"WHERE host = fixup_url(get_unreversed_host(NEW.rev_host)); " \
"END" \
)
#define CREATE_PLACES_AFTERUPDATE_TYPED_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterupdate_typed_trigger " \
"AFTER UPDATE OF typed ON moz_places FOR EACH ROW " \
"WHEN NEW.typed = 1 " \
"BEGIN " \
"UPDATE moz_hosts " \
"SET typed = 1 " \
"WHERE host = fixup_url(get_unreversed_host(NEW.rev_host)); " \
"END" \
)
/**
* This trigger removes a row from moz_openpages_temp when open_count reaches 0.
*
* @note this should be kept up-to-date with the definition in
* nsPlacesAutoComplete.js
*/
#define CREATE_REMOVEOPENPAGE_CLEANUP_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMPORARY TRIGGER moz_openpages_temp_afterupdate_trigger " \
"AFTER UPDATE OF open_count ON moz_openpages_temp FOR EACH ROW " \
"WHEN NEW.open_count = 0 " \
"BEGIN " \
"DELETE FROM moz_openpages_temp " \
"WHERE url = NEW.url;" \
"END" \
)
#endif // __nsPlacesTriggers_h__