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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; })(jQuery);