The Tor Browser: toolkit/components/places/nsPlacesTriggers.h@6474c204b198 (annotated)

toolkit/components/places/nsPlacesTriggers.h@6474c204b198 (annotated)

toolkit/components/places/nsPlacesTriggers.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #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" \
 )
 /**
  * A predicate matching pages on rev_host, based on a given host value.
  * 'host' may be either the moz_hosts.host column or an alias representing an
  * equivalent value.
  */
 #define HOST_TO_REVHOST_PREDICATE \
   "rev_host = get_unreversed_host(host || '.') || '.' " \
   "OR rev_host = get_unreversed_host(host || '.') || '.www.'"
 /**
  * Select the best prefix for a host, based on existing pages registered for it.
  * Prefixes have a priority, from the top to the bottom, so that secure pages
  * have higher priority, and more generically "www." prefixed hosts come before
  * unprefixed ones.
  * Given a host, examine associated pages and:
  *  - if all of the typed pages start with https://www. return https://www.
  *  - if all of the typed pages start with https:// return https://
  *  - if all of the typed pages start with ftp: return ftp://
  *  - if all of the typed pages start with www. return www.
  *  - otherwise don't use any prefix
  */
 #define HOSTS_PREFIX_PRIORITY_FRAGMENT \
   "SELECT CASE " \
     "WHEN 1 = ( " \
       "SELECT min(substr(url,1,12) = 'https://www.') FROM moz_places h " \
       "WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
     ") THEN 'https://www.' " \
     "WHEN 1 = ( " \
       "SELECT min(substr(url,1,8) = 'https://') FROM moz_places h " \
       "WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
     ") THEN 'https://' " \
     "WHEN 1 = ( " \
       "SELECT min(substr(url,1,4) = 'ftp:') FROM moz_places h " \
       "WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
     ") THEN 'ftp://' " \
     "WHEN 1 = ( " \
       "SELECT min(substr(url,1,11) = 'http://www.') FROM moz_places h " \
       "WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
     ") THEN 'www.' " \
   "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, prefix) " \
     "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(IFNULL((SELECT frecency FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), -1), NEW.frecency), " \
       "MAX(IFNULL((SELECT typed FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), 0), NEW.typed), " \
       "(" HOSTS_PREFIX_PRIORITY_FRAGMENT \
        "FROM ( " \
           "SELECT fixup_url(get_unreversed_host(NEW.rev_host)) AS host " \
         ") AS match " \
       ") " \
     "); " \
   "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.' " \
       "); " \
     "UPDATE moz_hosts " \
     "SET prefix = (" HOSTS_PREFIX_PRIORITY_FRAGMENT ") " \
     "WHERE host = fixup_url(get_unreversed_host(OLD.rev_host)); " \
   "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__

The Tor Browser / annotate

toolkit/components/places/nsPlacesTriggers.h@6474c204b198 (annotated)

toolkit/components/places/nsPlacesTriggers.h