Move trim_data into a new class: rrdFlotSelection, in the rrdFlotSupport module

1 files changed, 45 insertions, 0 deletions

diff --git a/src/lib/rrdFlotSupport.js b/src/lib/rrdFlotSupport.js
index 8aa9e49..ede309c 100644
--- a/src/lib/rrdFlotSupport.js
+++ b/src/lib/rrdFlotSupport.js
@@ -43,3 +43,48 @@ function rrdDS2FlotSeries(rrd_file,ds_id,rra_idx,want_label) {
   }

 }

 

+// ======================================

+// Helper class for handling selections

+// =======================================================

+function rrdFlotSelection() {

+  this.selection_min=null;

+  this.selection_max=null;

+}

+

+// reset to a state where ther is no selection

+rrdFlotSelection.prototype.reset = function() {

+      this.selection_min=null;

+      this.selection_max=null;

+}

+

+// given the selection ranges, set internal variable accordingly

+rrdFlotSelection.prototype.setFromFlotRanges = function(ranges) {

+      this.selection_min=ranges.xaxis.from;

+      this.selection_max=ranges.xaxis.to;

+}

+

+// Given an array of flot lines, limit to the selection

+rrdFlotSelection.prototype.trim_flot_data = function(flot_data) {

+  var out_data=[];

+  for (var i=0; i<flot_data.length; i++) {

+    var data_el=flot_data[i];

+    out_data.push({label : data_el.label, data:this.trim_data(data_el.data)});

+  }

+  return out_data;

+};

+

+// Limit to selection the flot series data element

+rrdFlotSelection.prototype.trim_data = function(data_list) {

+  if (this.selection_min==null) return data_list; // no selection => no filtering

+

+  var out_data=[];

+  for (var i=0; i<data_list.length; i++) {

+    if (data_list[i]==null) continue; // protect

+    var nr=data_list[i][0];

+    if ((nr>=this.selection_min) && (nr<=this.selection_max)) {

+      out_data.push(data_list[i]);

+    }

+  }

+  return out_data;

+};

+