text: /* Pretty handling of time axes.
  
  Copyright (c) 2007-2014 IOLA and Ole Laursen.
  Licensed under the MIT license.
  
  Set axis.mode to "time" to enable. See the section "Time series data" in
  API.txt for details.
  
  */
  
  (function ($) {
  
      var options = {
          xaxis: {
              timezone: null, // "browser" for local to the client or timezone for timezone-js
              timeformat: null, // format string to use
              twelveHourClock: false, // 12 or 24 time in time mode
              monthNames: null // list of names of months
          }
      };
  
      // round to nearby lower multiple of base
  
      function floorInBase(n, base) {
          return base * Math.floor(n / base);
      }
  
      // Returns a string with the date d formatted according to fmt.
      // A subset of the Open Group's strftime format is supported.
  
      function formatDate(d, fmt, monthNames, dayNames) {
  
          if (typeof d.strftime == "function") {
              return d.strftime(fmt);
          }
  
          var leftPad = function (n, pad) {
              n = "" + n;
              pad = "" + (pad == null ? "0" : pad);
              return n.length == 1 ? pad + n : n;
          };
  
          var r = [];
          var escape = false;
          var hours = d.getHours();
          var isAM = hours < 12;
  
          if (monthNames == null) {
              monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
          }
  
          if (dayNames == null) {
              dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
          }
  
          var hours12;
  
          if (hours > 12) {
              hours12 = hours - 12;
          } else if (hours == 0) {
              hours12 = 12;
          } else {
              hours12 = hours;
          }
  
          for (var i = 0; i < fmt.length; ++i) {
  
              var c = fmt.charAt(i);
  
              if (escape) {
                  switch (c) {
                      case 'a':
                          c = "" + dayNames[d.getDay()];
                          break;
                      case 'b':
                          c = "" + monthNames[d.getMonth()];
                          break;
                      case 'd':
                          c = leftPad(d.getDate());
                          break;
                      case 'e':
                          c = leftPad(d.getDate(), " ");
                          break;
                      case 'h': // For back-compat with 0.7; remove in 1.0
                      case 'H':
                          c = leftPad(hours);
                          break;
                      case 'I':
                          c = leftPad(hours12);
                          break;
                      case 'l':
                          c = leftPad(hours12, " ");
                          break;
                      case 'm':
                          c = leftPad(d.getMonth() + 1);
                          break;
                      case 'M':
                          c = leftPad(d.getMinutes());
                          break;
                          // quarters not in Open Group's strftime specification
                      case 'q':
                          c = "" + (Math.floor(d.getMonth() / 3) + 1);
                          break;
                      case 'S':
                          c = leftPad(d.getSeconds());
                          break;
                      case 'y':
                          c = leftPad(d.getFullYear() % 100);
                          break;
                      case 'Y':
                          c = "" + d.getFullYear();
                          break;
                      case 'p':
                          c = (isAM) ? ("" + "am") : ("" + "pm");
                          break;
                      case 'P':
                          c = (isAM) ? ("" + "AM") : ("" + "PM");
                          break;
                      case 'w':
                          c = "" + d.getDay();
                          break;
                  }
                  r.push(c);
                  escape = false;
              } else {
                  if (c == "%") {
                      escape = true;
                  } else {
                      r.push(c);
                  }
              }
          }
  
          return r.join("");
      }
  
      // To have a consistent view of time-based data independent of which time
      // zone the client happens to be in we need a date-like object independent
      // of time zones.  This is done through a wrapper that only calls the UTC
      // versions of the accessor methods.
  
      function makeUtcWrapper(d) {
  
          function addProxyMethod(sourceObj, sourceMethod, targetObj, targetMethod) {
              sourceObj[sourceMethod] = function () {
                  return targetObj[targetMethod].apply(targetObj, arguments);
              };
          };
  
          var utc = {
              date: d
          };
  
          // support strftime, if found
  
          if (d.strftime != undefined) {
              addProxyMethod(utc, "strftime", d, "strftime");
          }
  
          addProxyMethod(utc, "getTime", d, "getTime");
          addProxyMethod(utc, "setTime", d, "setTime");
  
          var props = ["Date", "Day", "FullYear", "Hours", "Milliseconds", "Minutes", "Month", "Seconds"];
  
          for (var p = 0; p < props.length; p++) {
              addProxyMethod(utc, "get" + props[p], d, "getUTC" + props[p]);
              addProxyMethod(utc, "set" + props[p], d, "setUTC" + props[p]);
          }
  
          return utc;
      };
  
      // select time zone strategy.  This returns a date-like object tied to the
      // desired timezone
  
      function dateGenerator(ts, opts) {
          if (opts.timezone == "browser") {
              return new Date(ts);
          } else if (!opts.timezone || opts.timezone == "utc") {
              return makeUtcWrapper(new Date(ts));
          } else if (typeof timezoneJS != "undefined" && typeof timezoneJS.Date != "undefined") {
              var d = new timezoneJS.Date();
              // timezone-js is fickle, so be sure to set the time zone before
              // setting the time.
              d.setTimezone(opts.timezone);
              d.setTime(ts);
              return d;
          } else {
              return makeUtcWrapper(new Date(ts));
          }
      }
  
      // map of app. size of time units in milliseconds
  
      var timeUnitSize = {
          "second": 1000,
          "minute": 60 * 1000,
          "hour": 60 * 60 * 1000,
          "day": 24 * 60 * 60 * 1000,
          "month": 30 * 24 * 60 * 60 * 1000,
          "quarter": 3 * 30 * 24 * 60 * 60 * 1000,
          "year": 365.2425 * 24 * 60 * 60 * 1000
      };
  
      // the allowed tick sizes, after 1 year we use
      // an integer algorithm
  
      var baseSpec = [
          [1, "second"],
          [2, "second"],
          [5, "second"],
          [10, "second"],
          [30, "second"],
          [1, "minute"],
          [2, "minute"],
          [5, "minute"],
          [10, "minute"],
          [30, "minute"],
          [1, "hour"],
          [2, "hour"],
          [4, "hour"],
          [8, "hour"],
          [12, "hour"],
          [1, "day"],
          [2, "day"],
          [3, "day"],
          [0.25, "month"],
          [0.5, "month"],
          [1, "month"],
          [2, "month"]
      ];
  
      // we don't know which variant(s) we'll need yet, but generating both is
      // cheap
  
      var specMonths = baseSpec.concat([
          [3, "month"],
          [6, "month"],
          [1, "year"]
      ]);
      var specQuarters = baseSpec.concat([
          [1, "quarter"],
          [2, "quarter"],
          [1, "year"]
      ]);
  
      function init(plot) {
          plot.hooks.processOptions.push(function (plot, options) {
              $.each(plot.getAxes(), function (axisName, axis) {
  
                  var opts = axis.options;
  
                  if (opts.mode == "time") {
                      axis.tickGenerator = function (axis) {
  
                          var ticks = [];
                          var d = dateGenerator(axis.min, opts);
                          var minSize = 0;
  
                          // make quarter use a possibility if quarters are
                          // mentioned in either of these options
  
                          var spec = (opts.tickSize && opts.tickSize[1] ===
                                  "quarter") ||
                              (opts.minTickSize && opts.minTickSize[1] ===
                                  "quarter") ? specQuarters : specMonths;
  
                          if (opts.minTickSize != null) {
                              if (typeof opts.tickSize == "number") {
                                  minSize = opts.tickSize;
                              } else {
                                  minSize = opts.minTickSize[0] * timeUnitSize[opts.minTickSize[1]];
                              }
                          }
  
                          for (var i = 0; i < spec.length - 1; ++i) {
                              if (axis.delta < (spec[i][0] * timeUnitSize[spec[i][1]] +
                                      spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2 &&
                                  spec[i][0] * timeUnitSize[spec[i][1]] >= minSize) {
                                  break;
                              }
                          }
  
                          var size = spec[i][0];
                          var unit = spec[i][1];
  
                          // special-case the possibility of several years
  
                          if (unit == "year") {
  
                              // if given a minTickSize in years, just use it,
                              // ensuring that it's an integer
  
                              if (opts.minTickSize != null && opts.minTickSize[1] == "year") {
                                  size = Math.floor(opts.minTickSize[0]);
                              } else {
  
                                  var magn = Math.pow(10, Math.floor(Math.log(axis.delta / timeUnitSize.year) / Math.LN10));
                                  var norm = (axis.delta / timeUnitSize.year) / magn;
  
                                  if (norm < 1.5) {
                                      size = 1;
                                  } else if (norm < 3) {
                                      size = 2;
                                  } else if (norm < 7.5) {
                                      size = 5;
                                  } else {
                                      size = 10;
                                  }
  
                                  size *= magn;
                              }
  
                              // minimum size for years is 1
  
                              if (size < 1) {
                                  size = 1;
                              }
                          }
  
                          axis.tickSize = opts.tickSize || [size, unit];
                          var tickSize = axis.tickSize[0];
                          unit = axis.tickSize[1];
  
                          var step = tickSize * timeUnitSize[unit];
  
                          if (unit == "second") {
                              d.setSeconds(floorInBase(d.getSeconds(), tickSize));
                          } else if (unit == "minute") {
                              d.setMinutes(floorInBase(d.getMinutes(), tickSize));
                          } else if (unit == "hour") {
                              d.setHours(floorInBase(d.getHours(), tickSize));
                          } else if (unit == "month") {
                              d.setMonth(floorInBase(d.getMonth(), tickSize));
                          } else if (unit == "quarter") {
                              d.setMonth(3 * floorInBase(d.getMonth() / 3,
                                  tickSize));
                          } else if (unit == "year") {
                              d.setFullYear(floorInBase(d.getFullYear(), tickSize));
                          }
  
                          // reset smaller components
  
                          d.setMilliseconds(0);
  
                          if (step >= timeUnitSize.minute) {
                              d.setSeconds(0);
                          }
                          if (step >= timeUnitSize.hour) {
                              d.setMinutes(0);
                          }
                          if (step >= timeUnitSize.day) {
                              d.setHours(0);
                          }
                          if (step >= timeUnitSize.day * 4) {
                              d.setDate(1);
                          }
                          if (step >= timeUnitSize.month * 2) {
                              d.setMonth(floorInBase(d.getMonth(), 3));
                          }
                          if (step >= timeUnitSize.quarter * 2) {
                              d.setMonth(floorInBase(d.getMonth(), 6));
                          }
                          if (step >= timeUnitSize.year) {
                              d.setMonth(0);
                          }
  
                          var carry = 0;
                          var v = Number.NaN;
                          var prev;
  
                          do {
  
                              prev = v;
                              v = d.getTime();
                              ticks.push(v);
  
                              if (unit == "month" || unit == "quarter") {
                                  if (tickSize < 1) {
  
                                      // a bit complicated - we'll divide the
                                      // month/quarter up but we need to take
                                      // care of fractions so we don't end up in
                                      // the middle of a day
  
                                      d.setDate(1);
                                      var start = d.getTime();
                                      d.setMonth(d.getMonth() +
                                          (unit == "quarter" ? 3 : 1));
                                      var end = d.getTime();
                                      d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
                                      carry = d.getHours();
                                      d.setHours(0);
                                  } else {
                                      d.setMonth(d.getMonth() +
                                          tickSize * (unit == "quarter" ? 3 : 1));
                                  }
                              } else if (unit == "year") {
                                  d.setFullYear(d.getFullYear() + tickSize);
                              } else {
                                  d.setTime(v + step);
                              }
                          } while (v < axis.max && v != prev);
  
                          return ticks;
                      };
  
                      axis.tickFormatter = function (v, axis) {
  
                          var d = dateGenerator(v, axis.options);
  
                          // first check global format
  
                          if (opts.timeformat != null) {
                              return formatDate(d, opts.timeformat, opts.monthNames, opts.dayNames);
                          }
  
                          // possibly use quarters if quarters are mentioned in
                          // any of these places
  
                          var useQuarters = (axis.options.tickSize &&
                                  axis.options.tickSize[1] == "quarter") ||
                              (axis.options.minTickSize &&
                                  axis.options.minTickSize[1] == "quarter");
  
                          var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
                          var span = axis.max - axis.min;
                          var suffix = (opts.twelveHourClock) ? " %p" : "";
                          var hourCode = (opts.twelveHourClock) ? "%I" : "%H";
                          var fmt;
  
                          if (t < timeUnitSize.minute) {
                              fmt = hourCode + ":%M:%S" + suffix;
                          } else if (t < timeUnitSize.day) {
                              if (span < 2 * timeUnitSize.day) {
                                  fmt = hourCode + ":%M" + suffix;
                              } else {
                                  fmt = "%b %d " + hourCode + ":%M" + suffix;
                              }
                          } else if (t < timeUnitSize.month) {
                              fmt = "%b %d";
                          } else if ((useQuarters && t < timeUnitSize.quarter) ||
                              (!useQuarters && t < timeUnitSize.year)) {
                              if (span < timeUnitSize.year) {
                                  fmt = "%b";
                              } else {
                                  fmt = "%b %Y";
                              }
                          } else if (useQuarters && t < timeUnitSize.year) {
                              if (span < timeUnitSize.year) {
                                  fmt = "Q%q";
                              } else {
                                  fmt = "Q%q %Y";
                              }
                          } else {
                              fmt = "%Y";
                          }
  
                          var rt = formatDate(d, fmt, opts.monthNames, opts.dayNames);
  
                          return rt;
                      };
                  }
              });
          });
      }
  
      $.plot.plugins.push({
          init: init,
          options: options,
          name: 'time',
          version: '1.0'
      });
  
      // Time-axis support used to be in Flot core, which exposed the
      // formatDate function on the plot object.  Various plugins depend
      // on the function, so we need to re-expose it here.
  
      $.plot.formatDate = formatDate;
      $.plot.dateGenerator = dateGenerator;
  
  })(jQuery);