+++ /dev/null
-/* Pretty handling of time axes.
-
-Copyright (c) 2007-2013 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;
-
-})(jQuery);
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