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nsPlacesAutoComplete.js
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=2 sts=2 expandtab
* ***** 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 mozilla.org 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 ***** */
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
////////////////////////////////////////////////////////////////////////////////
//// Constants
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
// This is just a helper for the next constant.
function book_tag_sql_fragment(aName, aColumn, aForTag)
{
return ["(",
"SELECT ", aColumn, " ",
"FROM moz_bookmarks b ",
"JOIN moz_bookmarks t ",
"ON t.id = b.parent ",
"AND t.parent ", (aForTag ? "" : "!"), "= :parent ",
"WHERE b.type = ", Ci.nsINavBookmarksService.TYPE_BOOKMARK, " ",
"AND b.fk = h.id ",
(aForTag ? "AND LENGTH(t.title) > 0" :
"ORDER BY b.lastModified DESC LIMIT 1"),
") AS ", aName].join("");
}
// This SQL query fragment provides the following:
// - the parent folder for bookmarked entries (kQueryIndexParent)
// - the bookmark title, if it is a bookmark (kQueryIndexBookmarkTitle)
// - the tags associated with a bookmarked entry (kQueryIndexTags)
const kBookTagSQLFragment =
book_tag_sql_fragment("parent", "b.parent", false) + ", " +
book_tag_sql_fragment("bookmark", "b.title", false) + ", " +
book_tag_sql_fragment("tags", "GROUP_CONCAT(t.title, ',')", true);
// observer topics
const kQuitApplication = "quit-application";
const kPrefChanged = "nsPref:changed";
// Match type constants. These indicate what type of search function we should
// be using.
const MATCH_ANYWHERE = Ci.mozIPlacesAutoComplete.MATCH_ANYWHERE;
const MATCH_BOUNDARY_ANYWHERE = Ci.mozIPlacesAutoComplete.MATCH_BOUNDARY_ANYWHERE;
const MATCH_BOUNDARY = Ci.mozIPlacesAutoComplete.MATCH_BOUNDARY;
const MATCH_BEGINNING = Ci.mozIPlacesAutoComplete.MATCH_BEGINNING;
// AutoComplete index constants. All AutoComplete queries will provide these
// columns in this order.
const kQueryIndexURL = 0;
const kQueryIndexTitle = 1;
const kQueryIndexFaviconURL = 2;
const kQueryIndexParentId = 3;
const kQueryIndexBookmarkTitle = 4;
const kQueryIndexTags = 5;
const kQueryIndexVisitCount = 6;
const kQueryIndexTyped = 7;
const kQueryIndexPlaceId = 8;
const kQueryIndexQueryType = 9;
// AutoComplete query type constants. Describes the various types of queries
// that we can process.
const kQueryTypeKeyword = 0;
const kQueryTypeFiltered = 1;
// This separator is used as an RTL-friendly way to split the title and tags.
// It can also be used by an nsIAutoCompleteResult consumer to re-split the
// "comment" back into the title and the tag.
const kTitleTagsSeparator = " \u2013 ";
const kBrowserUrlbarBranch = "browser.urlbar.";
////////////////////////////////////////////////////////////////////////////////
//// Global Functions
/**
* Generates the SQL subquery to get the best favicon for a given revhost. This
* is the favicon for the most recent visit.
*
* @param aTableName
* The table to join to the moz_favicons table with. This must have a
* column called favicon_id.
* @return the SQL subquery (in string form) to get the best favicon.
*/
function best_favicon_for_revhost(aTableName)
{
return "(" +
"SELECT f.url " +
"FROM " + aTableName + " " +
"JOIN moz_favicons f ON f.id = favicon_id " +
"WHERE rev_host = IFNULL( " +
"(SELECT rev_host FROM moz_places_temp WHERE id = b.fk), " +
"(SELECT rev_host FROM moz_places WHERE id = b.fk) " +
") " +
"ORDER BY frecency DESC " +
"LIMIT 1 " +
")";
}
////////////////////////////////////////////////////////////////////////////////
//// AutoCompleteStatementCallbackWrapper class
/**
* Wraps a callback and ensures that handleCompletion is not dispatched if the
* query is no longer tracked.
*
* @param aCallback
* A reference to a nsPlacesAutoComplete.
* @param aDBConnection
* The database connection to execute the queries on.
*/
function AutoCompleteStatementCallbackWrapper(aCallback,
aDBConnection)
{
this._callback = aCallback;
this._db = aDBConnection;
}
AutoCompleteStatementCallbackWrapper.prototype = {
//////////////////////////////////////////////////////////////////////////////
//// mozIStorageStatementCallback
handleResult: function ACSCW_handleResult(aResultSet)
{
this._callback.handleResult.apply(this._callback, arguments);
},
handleError: function ACSCW_handleError(aError)
{
this._callback.handleError.apply(this._callback, arguments);
},
handleCompletion: function ACSCW_handleCompletion(aReason)
{
// Only dispatch handleCompletion if we are not done searching and are a
// pending search.
let callback = this._callback;
if (!callback.isSearchComplete() && callback.isPendingSearch(this._handle))
callback.handleCompletion.apply(callback, arguments);
},
//////////////////////////////////////////////////////////////////////////////
//// AutoCompleteStatementCallbackWrapper
/**
* Executes the specified query asynchronously. This object will notify
* this._callback if we should notify (logic explained in handleCompletion).
*
* @param aQueries
* The queries to execute asynchronously.
* @return a mozIStoragePendingStatement that can be used to cancel the
* queries.
*/
executeAsync: function ACSCW_executeAsync(aQueries)
{
return this._handle = this._db.executeAsync(aQueries, aQueries.length,
this);
},
//////////////////////////////////////////////////////////////////////////////
//// nsISupports
QueryInterface: XPCOMUtils.generateQI([
Ci.mozIStorageStatementCallback,
])
};
////////////////////////////////////////////////////////////////////////////////
//// nsPlacesAutoComplete class
function nsPlacesAutoComplete()
{
//////////////////////////////////////////////////////////////////////////////
//// Shared Constants for Smart Getters
// Define common pieces of various queries.
// TODO bug 412736 in case of a frecency tie, break it with h.typed and
// h.visit_count which is better than nothing. This is slow, so not doing it
// yet...
// Note: h.frecency is only selected because we need it for ordering.
function sql_base_fragment(aTableName) {
return "SELECT h.url, h.title, f.url, " + kBookTagSQLFragment + ", " +
"h.visit_count, h.typed, h.id, :query_type, h.frecency " +
"FROM " + aTableName + " h " +
"LEFT OUTER JOIN moz_favicons f ON f.id = h.favicon_id " +
"WHERE h.frecency <> 0 " +
"AND AUTOCOMPLETE_MATCH(:searchString, h.url, " +
"IFNULL(bookmark, h.title), tags, " +
"h.visit_count, h.typed, parent, " +
":matchBehavior, :searchBehavior) " +
"{ADDITIONAL_CONDITIONS} ";
}
const SQL_BASE = sql_base_fragment("moz_places_temp") +
"UNION ALL " +
sql_base_fragment("moz_places") +
"AND +h.id NOT IN (SELECT id FROM moz_places_temp) " +
"ORDER BY h.frecency DESC, h.id DESC " +
"LIMIT :maxResults";
//////////////////////////////////////////////////////////////////////////////
//// Smart Getters
this.__defineGetter__("_db", function() {
delete this._db;
return this._db = Cc["@mozilla.org/browser/nav-history-service;1"].
getService(Ci.nsPIPlacesDatabase).
DBConnection;
});
this.__defineGetter__("_bh", function() {
delete this._bh;
return this._bh = Cc["@mozilla.org/browser/global-history;2"].
getService(Ci.nsIBrowserHistory);
});
this.__defineGetter__("_textURIService", function() {
delete this._textURIService;
return this._textURIService = Cc["@mozilla.org/intl/texttosuburi;1"].
getService(Ci.nsITextToSubURI);
});
this.__defineGetter__("_bs", function() {
delete this._bs;
return this._bs = Cc["@mozilla.org/browser/nav-bookmarks-service;1"].
getService(Ci.nsINavBookmarksService);
});
this.__defineGetter__("_ioService", function() {
delete this._ioService;
return this._ioService = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
});
this.__defineGetter__("_faviconService", function() {
delete this._faviconService;
return this._faviconService = Cc["@mozilla.org/browser/favicon-service;1"].
getService(Ci.nsIFaviconService);
});
this.__defineGetter__("_defaultQuery", function() {
delete this._defaultQuery;
let replacementText = "";
return this._defaultQuery = this._db.createStatement(
SQL_BASE.replace("{ADDITIONAL_CONDITIONS}", replacementText, "g")
);
});
this.__defineGetter__("_historyQuery", function() {
delete this._historyQuery;
let replacementText = "AND h.visit_count > 0";
return this._historyQuery = this._db.createStatement(
SQL_BASE.replace("{ADDITIONAL_CONDITIONS}", replacementText, "g")
);
});
this.__defineGetter__("_bookmarkQuery", function() {
delete this._bookmarkQuery;
let replacementText = "AND bookmark IS NOT NULL";
return this._bookmarkQuery = this._db.createStatement(
SQL_BASE.replace("{ADDITIONAL_CONDITIONS}", replacementText, "g")
);
});
this.__defineGetter__("_tagsQuery", function() {
delete this._tagsQuery;
let replacementText = "AND tags IS NOT NULL";
return this._tagsQuery = this._db.createStatement(
SQL_BASE.replace("{ADDITIONAL_CONDITIONS}", replacementText, "g")
);
});
this.__defineGetter__("_typedQuery", function() {
delete this._typedQuery;
let replacementText = "AND h.typed = 1";
return this._typedQuery = this._db.createStatement(
SQL_BASE.replace("{ADDITIONAL_CONDITIONS}", replacementText, "g")
);
});
this.__defineGetter__("_adaptiveQuery", function() {
delete this._adaptiveQuery;
// In this query, we are taking kBookTagSQLFragment only for h.id because it
// uses data from the moz_bookmarks table and we sync tables on bookmark
// insert. So, most likely, h.id will always be populated when we have any
// bookmark. We still need to join on moz_places_temp for other data (eg.
// title).
return this._adaptiveQuery = this._db.createStatement(
"/* do not warn (bug 487789) */ " +
"SELECT IFNULL(h_t.url, h.url) AS c_url, " +
"IFNULL(h_t.title, h.title) AS c_title, f.url, " +
kBookTagSQLFragment + ", " +
"IFNULL(h_t.visit_count, h.visit_count) AS c_visit_count, " +
"IFNULL(h_t.typed, h.typed) AS c_typed, " +
"IFNULL(h_t.id, h.id), :query_type, rank " +
"FROM ( " +
"SELECT ROUND(MAX(((i.input = :search_string) + " +
"(SUBSTR(i.input, 1, LENGTH(:search_string)) = :search_string)) * " +
"i.use_count), 1) AS rank, place_id " +
"FROM moz_inputhistory i " +
"GROUP BY i.place_id " +
"HAVING rank > 0 " +
") AS i " +
"LEFT JOIN moz_places h ON h.id = i.place_id " +
"LEFT JOIN moz_places_temp h_t ON h_t.id = i.place_id " +
"LEFT JOIN moz_favicons f ON f.id = IFNULL(h_t.favicon_id, h.favicon_id) " +
"WHERE c_url NOTNULL " +
"AND AUTOCOMPLETE_MATCH(:searchString, c_url, " +
"IFNULL(bookmark, c_title), tags, " +
"c_visit_count, c_typed, parent, " +
":matchBehavior, :searchBehavior) " +
"ORDER BY rank DESC, IFNULL(h_t.frecency, h.frecency) DESC"
);
});
this.__defineGetter__("_keywordQuery", function() {
delete this._keywordQuery;
return this._keywordQuery = this._db.createStatement(
"/* do not warn (bug 487787) */ " +
"SELECT IFNULL( " +
"(SELECT REPLACE(url, '%s', :query_string) FROM moz_places_temp WHERE id = b.fk), " +
"(SELECT REPLACE(url, '%s', :query_string) FROM moz_places WHERE id = b.fk) " +
") AS search_url, IFNULL(h_t.title, h.title), " +
"COALESCE(f.url, " + best_favicon_for_revhost("moz_places_temp") + "," +
best_favicon_for_revhost("moz_places") + "), b.parent, " +
"b.title, NULL, IFNULL(h_t.visit_count, h.visit_count), " +
"IFNULL(h_t.typed, h.typed), COALESCE(h_t.id, h.id, b.fk), " +
":query_type " +
"FROM moz_keywords k " +
"JOIN moz_bookmarks b ON b.keyword_id = k.id " +
"LEFT JOIN moz_places AS h ON h.url = search_url " +
"LEFT JOIN moz_places_temp AS h_t ON h_t.url = search_url " +
"LEFT JOIN moz_favicons f ON f.id = IFNULL(h_t.favicon_id, h.favicon_id) " +
"WHERE LOWER(k.keyword) = LOWER(:keyword) " +
"ORDER BY IFNULL(h_t.frecency, h.frecency) DESC"
);
});
//////////////////////////////////////////////////////////////////////////////
//// Initialization
// load preferences
this._prefs = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService).
getBranch(kBrowserUrlbarBranch);
this._loadPrefs(true);
// register observers
this._os = Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
this._os.addObserver(this, kQuitApplication, false);
}
nsPlacesAutoComplete.prototype = {
//////////////////////////////////////////////////////////////////////////////
//// nsIAutoCompleteSearch
startSearch: function PAC_startSearch(aSearchString, aSearchParam,
aPreviousResult, aListener)
{
// Note: We don't use aPreviousResult to make sure ordering of results are
// consistent. See bug 412730 for more details.
// We want to store the original string with no leading or trailing
// whitespace for case sensitive searches.
this._originalSearchString = aSearchString.trim();
this._currentSearchString =
this._fixupSearchText(this._originalSearchString.toLowerCase());
this._listener = aListener;
let result = Cc["@mozilla.org/autocomplete/simple-result;1"].
createInstance(Ci.nsIAutoCompleteSimpleResult);
result.setSearchString(aSearchString);
result.setListener(this);
this._result = result;
// If we are not enabled, we need to return now.
if (!this._enabled) {
this._finishSearch(true);
return;
}
// Reset our search behavior to the default.
if (this._currentSearchString)
this._behavior = this._defaultBehavior;
else
this._behavior = this._emptySearchDefaultBehavior;
// For any given search, we run up to three queries:
// 1) keywords (this._keywordQuery)
// 2) adaptive learning (this._adaptiveQuery)
// 3) query from this._getSearch
// We always run (2) and (3), but (1) only gets ran if we get any filtered
// tokens from this._getSearch (if there are no tokens, there is nothing to
// match, so there is no reason to run the query).
let {query, tokens} =
this._getSearch(this._getUnfilteredSearchTokens(this._currentSearchString));
let queries = tokens.length ?
[this._getBoundKeywordQuery(tokens), this._getBoundAdaptiveQuery(), query] :
[this._getBoundAdaptiveQuery(), query];
// Start executing our queries.
this._executeQueries(queries);
// Set up our persistent state for the duration of the search.
this._searchTokens = tokens;
this._usedPlaceIds = {};
},
stopSearch: function PAC_stopSearch()
{
// We need to cancel our searches so we do not get any [more] results.
// However, it's possible we haven't actually started any searches, so this
// method may throw because this._pendingQuery may be undefined.
if (this._pendingQuery)
this._stopActiveQuery();
this._finishSearch(false);
},
//////////////////////////////////////////////////////////////////////////////
//// nsIAutoCompleteSimpleResultListener
onValueRemoved: function PAC_onValueRemoved(aResult, aURISpec, aRemoveFromDB)
{
if (aRemoveFromDB)
this._bh.removePage(this._ioService.newURI(aURISpec, null, null));
},
//////////////////////////////////////////////////////////////////////////////
//// mozIStorageStatementCallback
handleResult: function PAC_handleResult(aResultSet)
{
let row, haveMatches = false;
while (row = aResultSet.getNextRow()) {
let match = this._processRow(row);
haveMatches = haveMatches || match;
if (this._result.matchCount == this._maxRichResults) {
// We have enough results, so stop running our search.
this._stopActiveQuery();
// And finish our search.
this._finishSearch(true);
return;
}
}
// Notify about results if we've gotten them.
if (haveMatches)
this._notifyResults(true);
},
handleError: function PAC_handleError(aError)
{
Components.utils.reportError("Places AutoComplete: " + aError);
},
handleCompletion: function PAC_handleCompletion(aReason)
{
// If we have already finished our search, we should bail out early.
if (this.isSearchComplete())
return;
// If we do not have enough results, and our match type is
// MATCH_BOUNDARY_ANYWHERE, search again with MATCH_ANYWHERE to get more
// results.
if (this._matchBehavior == MATCH_BOUNDARY_ANYWHERE &&
this._result.matchCount < this._maxRichResults && !this._secondPass) {
this._secondPass = true;
let queries = [
this._getBoundAdaptiveQuery(MATCH_ANYWHERE),
this._getBoundSearchQuery(MATCH_ANYWHERE, this._searchTokens),
];
this._executeQueries(queries);
return;
}
this._finishSearch(true);
},
//////////////////////////////////////////////////////////////////////////////
//// nsIObserver
observe: function PAC_observe(aSubject, aTopic, aData)
{
if (aTopic == kQuitApplication) {
this._os.removeObserver(this, kQuitApplication);
// Remove our preference observer.
this._prefs.removeObserver("", this);
delete this._prefs;
// Finalize the statements that we have used.
let stmts = [
"_defaultQuery",
"_historyQuery",
"_bookmarkQuery",
"_tagsQuery",
"_typedQuery",
"_adaptiveQuery",
"_keywordQuery",
];
for (let i = 0; i < stmts.length; i++) {
// We do not want to create any query we haven't already created, so
// see if it is a getter first. __lookupGetter__ returns null if it is
// actually a statement.
if (!this.__lookupGetter__(stmts[i]))
this[stmts[i]].finalize();
}
}
else if (aTopic == kPrefChanged) {
this._loadPrefs();
}
},
//////////////////////////////////////////////////////////////////////////////
//// nsPlacesAutoComplete
/**
* Used to unescape encoded URI strings, and drop information that we do not
* care about for searching.
*
* @param aURIString
* The text to unescape and modify.
* @return the modified uri.
*/
_fixupSearchText: function PAC_fixupSearchText(aURIString)
{
let uri = aURIString;
if (uri.indexOf("http://") == 0)
uri = uri.slice(7);
else if (uri.indexOf("https://") == 0)
uri = uri.slice(8);
else if (uri.indexOf("ftp://") == 0)
uri = uri.slice(6);
return this._textURIService.unEscapeURIForUI("UTF-8", uri);
},
/**
* Generates the tokens used in searching from a given string.
*
* @param aSearchString
* The string to generate tokens from.
* @return an array of tokens.
*/
_getUnfilteredSearchTokens: function PAC_unfilteredSearchTokens(aSearchString)
{
// Calling split on an empty string will return an array containing one
// empty string. We don't want that, as it'll break our logic, so return an
// empty array then.
return aSearchString.length ? aSearchString.split(" ") : [];
},
/**
* Properly cleans up when searching is completed.
*
* @param aNotify
* Indicates if we should notify the AutoComplete listener about our
* results or not.
*/
_finishSearch: function PAC_finishSearch(aNotify)
{
// Notify about results if we are supposed to.
if (aNotify)
this._notifyResults(false);
// Clear our state
delete this._originalSearchString;
delete this._currentSearchString;
delete this._searchTokens;
delete this._listener;
delete this._result;
delete this._usedPlaceIds;
delete this._pendingQuery;
this._secondPass = false;
},
/**
* Executes the given queries asynchronously.
*
* @param aQueries
* The queries to execute.
*/
_executeQueries: function PAC_executeQueries(aQueries)
{
// Because we might get a handleCompletion for canceled queries, we want to
// filter out queries we no longer care about (described in the
// handleCompletion implementation of AutoCompleteStatementCallbackWrapper).
// Create our wrapper object and execute the queries.
let wrapper = new AutoCompleteStatementCallbackWrapper(this, this._db);
this._pendingQuery = wrapper.executeAsync(aQueries);
},
/**
* Stops executing our active query.
*/
_stopActiveQuery: function PAC_stopActiveQuery()
{
this._pendingQuery.cancel();
delete this._pendingQuery;
},
/**
* Notifies the listener about results.
*
* @param aSearchOngoing
* Indicates if the search is ongoing or not.
*/
_notifyResults: function PAC_notifyResults(aSearchOngoing)
{
let result = this._result;
let resultCode = result.matchCount ? "RESULT_SUCCESS" : "RESULT_NOMATCH";
if (aSearchOngoing)
resultCode += "_ONGOING";
result.setSearchResult(Ci.nsIAutoCompleteResult[resultCode]);
result.setDefaultIndex(result.matchCount ? 0 : -1);
this._listener.onSearchResult(this, result);
},
/**
* Loads the preferences that we care about.
*
* @param [optional] aRegisterObserver
* Indicates if the preference observer should be added or not. The
* default value is false.
*/
_loadPrefs: function PAC_loadPrefs(aRegisterObserver)
{
let self = this;
function safeGetter(aName, aDefault) {
let types = {
boolean: "Bool",
number: "Int",
string: "Char"
};
let type = types[typeof(aDefault)];
if (!type)
throw "Unknown type!";
// If the pref isn't set, we want to use the default.
try {
return self._prefs["get" + type + "Pref"](aName);
}
catch (e) {
return aDefault;
}
}
this._enabled = safeGetter("autocomplete.enabled", true);
this._matchBehavior = safeGetter("matchBehavior", MATCH_BOUNDARY_ANYWHERE);
this._filterJavaScript = safeGetter("filter.javascript", true);
this._maxRichResults = safeGetter("maxRichResults", 25);
this._restrictHistoryToken = safeGetter("restrict.history", "^");
this._restrictBookmarkToken = safeGetter("restrict.bookmark", "*");
this._restrictTypedToken = safeGetter("restrict.typed", "~");
this._restrictTagToken = safeGetter("restrict.tag", "+");
this._matchTitleToken = safeGetter("match.title", "#");
this._matchURLToken = safeGetter("match.url", "@");
this._defaultBehavior = safeGetter("default.behavior", 0);
// Further restrictions to apply for "empty searches" (i.e. searches for "").
// By default we use (HISTORY | TYPED) = 33.
this._emptySearchDefaultBehavior = this._defaultBehavior |
safeGetter("default.behavior.emptyRestriction", 33);
// Validate matchBehavior; default to MATCH_BOUNDARY_ANYWHERE.
if (this._matchBehavior != MATCH_ANYWHERE &&
this._matchBehavior != MATCH_BOUNDARY &&
this._matchBehavior != MATCH_BEGINNING)
this._matchBehavior = MATCH_BOUNDARY_ANYWHERE;
// register observer
if (aRegisterObserver) {
let pb = this._prefs.QueryInterface(Ci.nsIPrefBranch2);
pb.addObserver("", this, false);
}
},
/**
* Given an array of tokens, this function determines which query should be
* ran. It also removes any special search tokens.
*
* @param aTokens
* An array of search tokens.
* @return an object with two properties:
* query: the correctly optimized, bound query to search the database
* with.
* tokens: the filtered list of tokens to search with.
*/
_getSearch: function PAC_getSearch(aTokens)
{
// Set the proper behavior so our call to _getBoundSearchQuery gives us the
// correct query.
for (let i = aTokens.length - 1; i >= 0; i--) {
switch (aTokens[i]) {
case this._restrictHistoryToken:
this._setBehavior("history");
break;
case this._restrictBookmarkToken:
this._setBehavior("bookmark");
break;
case this._restrictTagToken:
this._setBehavior("tag");
break;
case this._matchTitleToken:
this._setBehavior("title");
break;
case this._matchURLToken:
this._setBehavior("url");
break;
case this._restrictTypedToken:
this._setBehavior("typed");
break;
default:
// We do not want to remove the token if we did not match.
continue;
};
aTokens.splice(i, 1);
}
// Set the right JavaScript behavior based on our preference. Note that the
// preference is whether or not we should filter JavaScript, and the
// behavior is if we should search it or not.
if (!this._filterJavaScript)
this._setBehavior("javascript");
return {
query: this._getBoundSearchQuery(this._matchBehavior, aTokens),
tokens: aTokens
};
},
/**
* Obtains the search query to be used based on the previously set search
* behaviors (accessed by this._hasBehavior). The query is bound and ready to
* execute.
*
* @param aMatchBehavior
* How this query should match its tokens to the search string.
* @param aTokens
* An array of search tokens.
* @return the correctly optimized query to search the database with and the
* new list of tokens to search with. The query has all the needed
* parameters bound, so consumers can execute it without doing any
* additional work.
*/
_getBoundSearchQuery: function PAC_getBoundSearchQuery(aMatchBehavior,
aTokens)
{
// We use more optimized queries for restricted searches, so we will always
// return the most restrictive one to the least restrictive one if more than
// one token is found.
let query = this._hasBehavior("tag") ? this._tagsQuery :
this._hasBehavior("bookmark") ? this._bookmarkQuery :
this._hasBehavior("typed") ? this._typedQuery :
this._hasBehavior("history") ? this._historyQuery :
this._defaultQuery;
// Bind the needed parameters to the query so consumers can use it.
let (params = query.params) {
params.parent = this._bs.tagsFolder;
params.query_type = kQueryTypeFiltered;
params.matchBehavior = aMatchBehavior;
params.searchBehavior = this._behavior;
// We only want to search the tokens that we are left with - not the
// original search string.
params.searchString = aTokens.join(" ");
// Limit the query to the the maximum number of desired results.
// This way we can avoid doing more work than needed.
params.maxResults = this._maxRichResults;
}
return query;
},
/**
* Obtains the keyword query with the properly bound parameters.
*
* @param aTokens
* The array of search tokens to check against.
* @return the bound keyword query.
*/
_getBoundKeywordQuery: function PAC_getBoundKeywordQuery(aTokens)
{
// The keyword is the first word in the search string, with the parameters
// following it.
let searchString = this._originalSearchString;
let queryString = searchString.substring(searchString.indexOf(" ") + 1);
// We need to escape the parameters as if they were the query in a URL
queryString = encodeURIComponent(queryString).replace("%20", "+", "g");
// The first word could be a keyword, so that's what we'll search.
let keyword = aTokens[0];
let query = this._keywordQuery;
let (params = query.params) {
params.keyword = keyword;
params.query_string = queryString;
params.query_type = kQueryTypeKeyword;
}
return query;
},
/**
* Obtains the adaptive query with the properly bound parameters.
*
* @return the bound adaptive query.
*/
_getBoundAdaptiveQuery: function PAC_getBoundAdaptiveQuery(aMatchBehavior)
{
// If we were not given a match behavior, use the stored match behavior.
if (arguments.length == 0)
aMatchBehavior = this._matchBehavior;
let query = this._adaptiveQuery;
let (params = query.params) {
params.parent = this._bs.tagsFolder;
params.search_string = this._currentSearchString;
params.query_type = kQueryTypeFiltered;
params.matchBehavior = aMatchBehavior;
params.searchBehavior = this._behavior;
}
return query;
},
/**
* Processes a mozIStorageRow to generate the proper data for the AutoComplete
* result. This will add an entry to the current result if it matches the
* criteria.
*
* @param aRow
* The row to process.
* @return true if the row is accepted, and false if not.
*/
_processRow: function PAC_processRow(aRow)
{
// Before we do any work, make sure this entry isn't already in our results.
let entryId = aRow.getResultByIndex(kQueryIndexPlaceId);
if (this._inResults(entryId))
return false;
let escapedEntryURL = aRow.getResultByIndex(kQueryIndexURL);
let entryTitle = aRow.getResultByIndex(kQueryIndexTitle) || "";
let entryFavicon = aRow.getResultByIndex(kQueryIndexFaviconURL) || "";
let entryParentId = aRow.getResultByIndex(kQueryIndexParentId);
let entryBookmarkTitle = entryParentId ?
aRow.getResultByIndex(kQueryIndexBookmarkTitle) : null;
let entryTags = aRow.getResultByIndex(kQueryIndexTags) || "";
// Always prefer the bookmark title unless it is empty
let title = entryBookmarkTitle || entryTitle;
let style;
if (aRow.getResultByIndex(kQueryIndexQueryType) == kQueryTypeKeyword) {
// If we do not have a title, then we must have a keyword, so let the UI
// know it is a keyword. Otherwise, we found an exact page match, so just
// show the page like a regular result. Because the page title is likely
// going to be more specific than the bookmark title (keyword title).
if (!entryTitle)
style = "keyword";
else
title = entryTitle;
}
// We will always prefer to show tags if we have them.
let showTags = !!entryTags;
// However, we'll act as if a page is not bookmarked or tagged if the user
// only wants only history and not bookmarks or tags.
if (this._hasBehavior("history") &&
!(this._hasBehavior("bookmark") || this._hasBehavior("tag"))) {
showTags = false;
style = "favicon";
}
// If we have tags and should show them, we need to add them to the title.
if (showTags)
title += kTitleTagsSeparator + entryTags;
// We have to determine the right style to display. Tags show the tag icon,
// bookmarks get the bookmark icon, and keywords get the keyword icon. If
// the result does not fall into any of those, it just gets the favicon.
if (!style) {
// It is possible that we already have a style set (from a keyword
// search or because of the user's preferences), so only set it if we
// haven't already done so.
if (showTags)
style = "tag";
else if (entryParentId)
style = "bookmark";
else
style = "favicon";
}
// And finally add this to our results.
this._addToResults(entryId, escapedEntryURL, title, entryFavicon, style);
return true;
},
/**
* Checks to see if the given place has already been added to the results.
*
* @param aPlaceId
* The place_id to check for.
* @return true if the place has been added, false otherwise.
*/
_inResults: function PAC_inResults(aPlaceId)
{
return (aPlaceId in this._usedPlaceIds);
},
/**
* Adds a result to the AutoComplete results. Also tracks that we've added
* this place_id into the result set.
*
* @param aPlaceId
* The place_id of the item to be added to the result set. This is
* used by _inResults.
* @param aURISpec
* The URI spec for the entry.
* @param aTitle
* The title to give the entry.
* @param aFaviconSpec
* The favicon to give to the entry.
* @param aStyle
* Indicates how the entry should be styled when displayed.
*/
_addToResults: function PAC_addToResults(aPlaceId, aURISpec, aTitle,
aFaviconSpec, aStyle)
{
// Add this to our internal tracker to ensure duplicates do not end up in
// the result. _usedPlaceIds is an Object that is being used as a set.
this._usedPlaceIds[aPlaceId] = true;
// Obtain the favicon for this URI.
let favicon;
if (aFaviconSpec) {
let uri = this._ioService.newURI(aFaviconSpec, null, null);
favicon = this._faviconService.getFaviconLinkForIcon(uri).spec;
}
favicon = favicon || this._faviconService.defaultFavicon.spec;
this._result.appendMatch(aURISpec, aTitle, favicon, aStyle);
},
/**
* Determines if the specified AutoComplete behavior is set.
*
* @param aType
* The behavior type to test for.
* @return true if the behavior is set, false otherwise.
*/
_hasBehavior: function PAC_hasBehavior(aType)
{
return (this._behavior &
Ci.mozIPlacesAutoComplete["BEHAVIOR_" + aType.toUpperCase()]);
},
/**
* Enables the desired AutoComplete behavior.
*
* @param aType
* The behavior type to set.
*/
_setBehavior: function PAC_setBehavior(aType)
{
this._behavior |=
Ci.mozIPlacesAutoComplete["BEHAVIOR_" + aType.toUpperCase()];
},
/**
* Determines if we are done searching or not.
*
* @return true if we have completed searching, false otherwise.
*/
isSearchComplete: function PAC_isSearchComplete()
{
// If _pendingQuery is null, we should no longer do any work since we have
// already called _finishSearch. This means we completed our search.
return this._pendingQuery == null;
},
/**
* Determines if the given handle of a pending statement is a pending search
* or not.
*
* @param aHandle
* A mozIStoragePendingStatement to check and see if we are waiting for
* results from it still.
* @return true if it is a pending query, false otherwise.
*/
isPendingSearch: function PAC_isPendingSearch(aHandle)
{
return this._pendingQuery == aHandle;
},
//////////////////////////////////////////////////////////////////////////////
//// nsISupports
classDescription: "AutoComplete result generator for Places.",
classID: Components.ID("d0272978-beab-4adc-a3d4-04b76acfa4e7"),
contractID: "@mozilla.org/autocomplete/search;1?name=history",
QueryInterface: XPCOMUtils.generateQI([
Ci.nsIAutoCompleteSearch,
Ci.nsIAutoCompleteSimpleResultListener,
Ci.mozIStorageStatementCallback,
Ci.nsIObserver,
])
};
////////////////////////////////////////////////////////////////////////////////
//// Module Registration
let components = [nsPlacesAutoComplete];
function NSGetModule(compMgr, fileSpec)
{
return XPCOMUtils.generateModule(components);
}