| // Copyright 2011 Google Inc. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package com.google.typography.font.compression; |
| |
| import com.google.common.collect.Lists; |
| |
| import java.io.PrintWriter; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Class for gathering up stats, for summarizing and graphing. |
| * |
| * @author raph@google.com (Raph Levien) |
| */ |
| public class StatsCollector { |
| private final List<Double> values; |
| |
| public StatsCollector() { |
| values = Lists.newArrayList(); |
| } |
| |
| public void addStat(double value) { |
| values.add(value); |
| } |
| |
| public double mean() { |
| double sum = 0; |
| for (Double value : values) { |
| sum += value; |
| } |
| return sum / values.size(); |
| } |
| |
| public double median() { |
| Collections.sort(values); |
| int length = values.size(); |
| if (length % 2 == 1) { |
| return values.get((length - 1) / 2); |
| } else { |
| return 0.5 * (values.get(length / 2 - 1) + values.get(length / 2)); |
| } |
| } |
| |
| // Need to print <html> before calling this method |
| public void chartHeader(PrintWriter o, int n) { |
| o.println("<head>"); |
| o.println("<script type='text/javascript' src='https://www.google.com/jsapi'></script>"); |
| o.println("<script type='text/javascript'>"); |
| o.println("google.load('visualization', '1', {packages:['corechart']});"); |
| o.println("google.setOnLoadCallback(drawChart);"); |
| o.println("function drawChart() {"); |
| o.println(" var data = new google.visualization.DataTable()"); |
| o.println(" data.addColumn('string', 'Font');"); |
| if (n == 1) { |
| o.println(" data.addColumn('number', 'Ratio');"); |
| } else { |
| for (int i = 0; i < n; i++) { |
| o.printf(" data.addColumn('number', 'Ratio %c');\n", 'A' + i); |
| } |
| } |
| o.printf(" data.addRows(%d);\n", values.size()); |
| } |
| |
| public void chartData(PrintWriter o, int ix) { |
| Collections.sort(values); |
| int length = values.size(); |
| for (int i = 0; i < length; i++) { |
| o.printf(" data.setValue(%d, %d, %f);\n", i, ix, values.get(i)); |
| } |
| } |
| |
| public void chartEnd(PrintWriter o) { |
| o.println(" var chart = new google.visualization.LineChart(document.getElementById(" |
| + "'chart_div'));"); |
| o.println(" chart.draw(data, {width:700, height:400, title: 'Compression ratio'});"); |
| o.println("}"); |
| o.println("</script>"); |
| o.println("</head>"); |
| |
| o.println(); |
| o.println("<body>"); |
| o.println("<div id='chart_div'></div>"); |
| // TODO: split so we can get content into the HTML |
| } |
| public void chartFooter(PrintWriter o) { |
| o.println("</body>"); |
| o.println("</html>"); |
| } |
| } |