From 14ebf05e43d0286618300ec89ed1c40a10918159 Mon Sep 17 00:00:00 2001
From: Jacopo De Simoi <wilderkde@gmail.com>
Date: Wed, 19 May 2010 09:51:21 +0000
Subject: [PATCH] Saturates the relevance boost given to already run matches;
 this avoids very commonly selected matches (e.g. konsole) to beat any other
 match even if the latter is in principle more relevant

svn path=/trunk/KDE/kdelibs/; revision=1128445
---
 runnercontext.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/runnercontext.cpp b/runnercontext.cpp
index 05582c830..5d57540d9 100644
--- a/runnercontext.cpp
+++ b/runnercontext.cpp
@@ -19,6 +19,8 @@
 
 #include "runnercontext.h"
 
+#include <cmath>
+
 #include <QReadWriteLock>
 
 #include <QDir>
@@ -375,8 +377,9 @@ bool RunnerContext::addMatches(const QString &term, const QList<QueryMatch> &mat
     LOCK_FOR_WRITE(d)
     foreach (QueryMatch match, matches) {
         // Give previously launched matches a slight boost in relevance
+        // The boost smoothly saturates to 0.5;
         if (int count = d->launchCounts.value(match.id())) {
-            match.setRelevance(match.relevance() + 0.05 * count);
+            match.setRelevance(match.relevance() + 0.5 * (1-exp(-count*0.3)));
         }
 
         d->matches.append(match);