Upgraded the index feature.

1: The index itself is computed so that the _change_ in index value
   between any two points in time indicates the average performance
   increase during this time period in terms of a log2-based
   difference. An index value _change_ of 1, 0, and -1 thus
   indicates a doubled, unchanged, and halved performance respectively.
   (The corresponding linear factors would be 2, 1, and 0.5.).

   Note: Individual index values bear no useful meaning when regarded in
   isolation. The graph is however shifted vertically so that each
   individual index value indicates the change from the index value at the
   given base time (the index value of the latter is then 0 and 1 in the
   log2 and linear domain respectively).

2: Clicking on a particular data point in the index graph now opens a
   page that shows the top-10 results histories that contributed most
   significantly to this particular change in the index value.

   Each contributor graph indicates the data points that were used for
   computing the contribution for this index value.

1 files changed, 25 insertions, 0 deletions

diff --git a/src/bm/bmrequest.h b/src/bm/bmrequest.h
index a769e0f..0732778 100644
--- a/src/bm/bmrequest.h
+++ b/src/bm/bmrequest.h
@@ -25,6 +25,7 @@
 #define BMREQUEST_H
 
 #include "bmmisc.h"
+#include "index.h"
 #include <QtXml>
 #include <QImage>
 #include <QColor>
@@ -693,6 +694,7 @@ private:
 };
 
 // ### 2 B DOCUMENTED (in bmclient.html and bmproto.html)
+// ### NOTE: This request should be renamed to GetTCHistories ... 2 B DONE!
 class BMRequest_GetHistories : public BMRequest
 {
 public:
@@ -730,4 +732,27 @@ private:
     void handleReply_JSON(const QStringList &args) const;
 };
 
+// ### 2 B DOCUMENTED (in bmclient.html and bmproto.html)
+class BMRequest_GetIXHistories : public BMRequest
+{
+public:
+    BMRequest_GetIXHistories(
+        const int evalTimestamp, const QList<Index::RankedInfo> &rankedInfos,
+        const QString &cacheKey)
+        : evalTimestamp(evalTimestamp), rankedInfos(rankedInfos), cacheKey(cacheKey) {}
+    BMRequest_GetIXHistories(const QDomDocument &doc) : BMRequest(doc) {}
+private:
+    mutable int evalTimestamp;
+    QList<Index::RankedInfo> rankedInfos;
+    QString cacheKey;
+
+    QString name() const { return "GetIXHistories"; }
+    QByteArray toRequestBuffer(QString *error);
+    QByteArray toReplyBuffer();
+    void handleReply_Raw(const QStringList &args) const { Q_UNUSED(args); /* 2 B DONE! */ };
+    void handleReply_JSON(const QStringList &args) const { Q_UNUSED(args); /* 2 B DONE! */ }
+    void handleReply_HTML(const QStringList &args) const;
+    void handleReply_Image(const QStringList &args) const;
+};
+
 #endif // BMREQUEST_H