Limit the Safari history to the most recent 200 items

Fixes quicksilver/Quicksilver#3085

NB: This is inentionally in the `remote-action` branch so I can test the new plugin release process.

Author: n8henrie

Documentation.mdown

@@ -4,6 +4,18 @@ The Safari plug-in allows you to index your Safari bookmarks and history. You ca
 
 It also provides access to all currently open pages. Select "Open Web Pages" in the first pane and hit → or /.
 
+As of 2.5.3 the history is limited by default to the most recent 200 items, which resolves an issue that results in tremendous memory consumption.
+
+To adjust this number:
+
+1. Go to ~/Library/Application Support/Quicksilver/PlugIns/
+1. find `Safari Plugin.qsplugin`
+1. right-click -> "Show Package Contents"
+1. then open `Contents/Info.plist`
+1. In there, find the entry QSPresetAdditions -> Item 0 -> children -> Item 1 -> settings -> historySize
+1. Change the number to something different
+1. Restart Quicksilver and rescan the catalog
+
 ### Proxy Objects ###
 
 There are two proxy objects: Current Web Page and Current Website

Info.plist

@@ -17,9 +17,9 @@
 	<key>CFBundlePackageType</key>
 	<string>BNDL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.5.2</string>
+	<string>2.5.3</string>
 	<key>CFBundleVersion</key>
-	<string>150</string>
+	<string>151</string>
 	<key>QSActions</key>
 	<dict>
 		<key>QSSafariAddToReadingListAction</key>
@@ -126,6 +126,8 @@
 						<string>~/Library/Safari/History.db-wal</string>
 						<key>skipItem</key>
 						<integer>1</integer>
+						<key>historySize</key>
+						<integer>1000</integer>
 					</dict>
 					<key>source</key>
 					<string>QSFileSystemObjectSource</string>

QSSafariPlugin.m

@@ -339,9 +339,9 @@ - (NSArray *)objectsFromPath:(NSString *)path withSettings:(NSDictionary *)setti
 		if (!db) {
 			return @[];
 		}
-		NSString *query = @"SELECT i.url AS url, v.title AS title FROM history_items i INNER JOIN history_visits v ON i.id=v.history_item ORDER BY v.visit_time DESC;";
-		FMResultSet *rs = [db executeQuery:query];
-		
+		NSString *query = @"SELECT i.url AS url, v.title AS title FROM history_items i INNER JOIN history_visits v ON i.id=v.history_item ORDER BY v.visit_time DESC LIMIT ?;";
+		FMResultSet *rs = [db executeQuery:query, [settings objectForKey:@"historySize"]];
+
 		if ([db hadError]) {
 			NSLog(@"Error while reading Safari history database. Error %d: %@", [db lastErrorCode], [db lastErrorMessage]);
 			return @[];