+++ /dev/null
-/**
- * @license
- * Copyright 2011 Dan Vanderkam (danvdk@gmail.com)
- * MIT-licensed (http://opensource.org/licenses/MIT)
- */
-
-/**
- * @fileoverview This file contains utility functions used by dygraphs. These
- * are typically static (i.e. not related to any particular dygraph). Examples
- * include date/time formatting functions, basic algorithms (e.g. binary
- * search) and generic DOM-manipulation functions.
- */
-
-(function() {
-
-/*global Dygraph:false, Node:false */
-"use strict";
-
-Dygraph.LOG_SCALE = 10;
-Dygraph.LN_TEN = Math.log(Dygraph.LOG_SCALE);
-
-/**
- * @private
- * @param {number} x
- * @return {number}
- */
-Dygraph.log10 = function(x) {
- return Math.log(x) / Dygraph.LN_TEN;
-};
-
-/** A dotted line stroke pattern. */
-Dygraph.DOTTED_LINE = [2, 2];
-/** A dashed line stroke pattern. */
-Dygraph.DASHED_LINE = [7, 3];
-/** A dot dash stroke pattern. */
-Dygraph.DOT_DASH_LINE = [7, 2, 2, 2];
-
-/**
- * Return the 2d context for a dygraph canvas.
- *
- * This method is only exposed for the sake of replacing the function in
- * automated tests, e.g.
- *
- * var oldFunc = Dygraph.getContext();
- * Dygraph.getContext = function(canvas) {
- * var realContext = oldFunc(canvas);
- * return new Proxy(realContext);
- * };
- * @param {!HTMLCanvasElement} canvas
- * @return {!CanvasRenderingContext2D}
- * @private
- */
-Dygraph.getContext = function(canvas) {
- return /** @type{!CanvasRenderingContext2D}*/(canvas.getContext("2d"));
-};
-
-/**
- * Add an event handler.
- * @param {!Node} elem The element to add the event to.
- * @param {string} type The type of the event, e.g. 'click' or 'mousemove'.
- * @param {function(Event):(boolean|undefined)} fn The function to call
- * on the event. The function takes one parameter: the event object.
- * @private
- */
-Dygraph.addEvent = function addEvent(elem, type, fn) {
- elem.addEventListener(type, fn, false);
-};
-
-/**
- * Add an event handler. This event handler is kept until the graph is
- * destroyed with a call to graph.destroy().
- *
- * @param {!Node} elem The element to add the event to.
- * @param {string} type The type of the event, e.g. 'click' or 'mousemove'.
- * @param {function(Event):(boolean|undefined)} fn The function to call
- * on the event. The function takes one parameter: the event object.
- * @private
- */
-Dygraph.prototype.addAndTrackEvent = function(elem, type, fn) {
- Dygraph.addEvent(elem, type, fn);
- this.registeredEvents_.push({ elem : elem, type : type, fn : fn });
-};
-
-/**
- * Remove an event handler.
- * @param {!Node} elem The element to remove the event from.
- * @param {string} type The type of the event, e.g. 'click' or 'mousemove'.
- * @param {function(Event):(boolean|undefined)} fn The function to call
- * on the event. The function takes one parameter: the event object.
- * @private
- */
-Dygraph.removeEvent = function(elem, type, fn) {
- elem.removeEventListener(type, fn, false);
-};
-
-Dygraph.prototype.removeTrackedEvents_ = function() {
- if (this.registeredEvents_) {
- for (var idx = 0; idx < this.registeredEvents_.length; idx++) {
- var reg = this.registeredEvents_[idx];
- Dygraph.removeEvent(reg.elem, reg.type, reg.fn);
- }
- }
-
- this.registeredEvents_ = [];
-};
-
-/**
- * Cancels further processing of an event. This is useful to prevent default
- * browser actions, e.g. highlighting text on a double-click.
- * Based on the article at
- * http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel
- * @param {!Event} e The event whose normal behavior should be canceled.
- * @private
- */
-Dygraph.cancelEvent = function(e) {
- e = e ? e : window.event;
- if (e.stopPropagation) {
- e.stopPropagation();
- }
- if (e.preventDefault) {
- e.preventDefault();
- }
- e.cancelBubble = true;
- e.cancel = true;
- e.returnValue = false;
- return false;
-};
-
-/**
- * Convert hsv values to an rgb(r,g,b) string. Taken from MochiKit.Color. This
- * is used to generate default series colors which are evenly spaced on the
- * color wheel.
- * @param { number } hue Range is 0.0-1.0.
- * @param { number } saturation Range is 0.0-1.0.
- * @param { number } value Range is 0.0-1.0.
- * @return { string } "rgb(r,g,b)" where r, g and b range from 0-255.
- * @private
- */
-Dygraph.hsvToRGB = function (hue, saturation, value) {
- var red;
- var green;
- var blue;
- if (saturation === 0) {
- red = value;
- green = value;
- blue = value;
- } else {
- var i = Math.floor(hue * 6);
- var f = (hue * 6) - i;
- var p = value * (1 - saturation);
- var q = value * (1 - (saturation * f));
- var t = value * (1 - (saturation * (1 - f)));
- switch (i) {
- case 1: red = q; green = value; blue = p; break;
- case 2: red = p; green = value; blue = t; break;
- case 3: red = p; green = q; blue = value; break;
- case 4: red = t; green = p; blue = value; break;
- case 5: red = value; green = p; blue = q; break;
- case 6: // fall through
- case 0: red = value; green = t; blue = p; break;
- }
- }
- red = Math.floor(255 * red + 0.5);
- green = Math.floor(255 * green + 0.5);
- blue = Math.floor(255 * blue + 0.5);
- return 'rgb(' + red + ',' + green + ',' + blue + ')';
-};
-
-// The following functions are from quirksmode.org with a modification for Safari from
-// http://blog.firetree.net/2005/07/04/javascript-find-position/
-// http://www.quirksmode.org/js/findpos.html
-// ... and modifications to support scrolling divs.
-
-/**
- * Find the coordinates of an object relative to the top left of the page.
- *
- * TODO(danvk): change obj type from Node -> !Node
- * @param {Node} obj
- * @return {{x:number,y:number}}
- * @private
- */
-Dygraph.findPos = function(obj) {
- var curleft = 0, curtop = 0;
- if (obj.offsetParent) {
- var copyObj = obj;
- while (1) {
- var borderLeft = "0", borderTop = "0";
- var computedStyle = window.getComputedStyle(copyObj, null);
- borderLeft = computedStyle.borderLeft || "0";
- borderTop = computedStyle.borderTop || "0";
- curleft += parseInt(borderLeft, 10) ;
- curtop += parseInt(borderTop, 10) ;
- curleft += copyObj.offsetLeft;
- curtop += copyObj.offsetTop;
- if (!copyObj.offsetParent) {
- break;
- }
- copyObj = copyObj.offsetParent;
- }
- } else {
- // TODO(danvk): why would obj ever have these properties?
- if (obj.x) curleft += obj.x;
- if (obj.y) curtop += obj.y;
- }
-
- // This handles the case where the object is inside a scrolled div.
- while (obj && obj != document.body) {
- curleft -= obj.scrollLeft;
- curtop -= obj.scrollTop;
- obj = obj.parentNode;
- }
- return {x: curleft, y: curtop};
-};
-
-/**
- * Returns the x-coordinate of the event in a coordinate system where the
- * top-left corner of the page (not the window) is (0,0).
- * Taken from MochiKit.Signal
- * @param {!Event} e
- * @return {number}
- * @private
- */
-Dygraph.pageX = function(e) {
- if (e.pageX) {
- return (!e.pageX || e.pageX < 0) ? 0 : e.pageX;
- } else {
- var de = document.documentElement;
- var b = document.body;
- return e.clientX +
- (de.scrollLeft || b.scrollLeft) -
- (de.clientLeft || 0);
- }
-};
-
-/**
- * Returns the y-coordinate of the event in a coordinate system where the
- * top-left corner of the page (not the window) is (0,0).
- * Taken from MochiKit.Signal
- * @param {!Event} e
- * @return {number}
- * @private
- */
-Dygraph.pageY = function(e) {
- if (e.pageY) {
- return (!e.pageY || e.pageY < 0) ? 0 : e.pageY;
- } else {
- var de = document.documentElement;
- var b = document.body;
- return e.clientY +
- (de.scrollTop || b.scrollTop) -
- (de.clientTop || 0);
- }
-};
-
-/**
- * Converts page the x-coordinate of the event to pixel x-coordinates on the
- * canvas (i.e. DOM Coords).
- * @param {!Event} e Drag event.
- * @param {!DygraphInteractionContext} context Interaction context object.
- * @return {number} The amount by which the drag has moved to the right.
- */
-Dygraph.dragGetX_ = function(e, context) {
- return Dygraph.pageX(e) - context.px;
-};
-
-/**
- * Converts page the y-coordinate of the event to pixel y-coordinates on the
- * canvas (i.e. DOM Coords).
- * @param {!Event} e Drag event.
- * @param {!DygraphInteractionContext} context Interaction context object.
- * @return {number} The amount by which the drag has moved down.
- */
-Dygraph.dragGetY_ = function(e, context) {
- return Dygraph.pageY(e) - context.py;
-};
-
-/**
- * This returns true unless the parameter is 0, null, undefined or NaN.
- * TODO(danvk): rename this function to something like 'isNonZeroNan'.
- *
- * @param {number} x The number to consider.
- * @return {boolean} Whether the number is zero or NaN.
- * @private
- */
-Dygraph.isOK = function(x) {
- return !!x && !isNaN(x);
-};
-
-/**
- * @param {{x:?number,y:?number,yval:?number}} p The point to consider, valid
- * points are {x, y} objects
- * @param {boolean=} opt_allowNaNY Treat point with y=NaN as valid
- * @return {boolean} Whether the point has numeric x and y.
- * @private
- */
-Dygraph.isValidPoint = function(p, opt_allowNaNY) {
- if (!p) return false; // null or undefined object
- if (p.yval === null) return false; // missing point
- if (p.x === null || p.x === undefined) return false;
- if (p.y === null || p.y === undefined) return false;
- if (isNaN(p.x) || (!opt_allowNaNY && isNaN(p.y))) return false;
- return true;
-};
-
-/**
- * Number formatting function which mimicks the behavior of %g in printf, i.e.
- * either exponential or fixed format (without trailing 0s) is used depending on
- * the length of the generated string. The advantage of this format is that
- * there is a predictable upper bound on the resulting string length,
- * significant figures are not dropped, and normal numbers are not displayed in
- * exponential notation.
- *
- * NOTE: JavaScript's native toPrecision() is NOT a drop-in replacement for %g.
- * It creates strings which are too long for absolute values between 10^-4 and
- * 10^-6, e.g. '0.00001' instead of '1e-5'. See tests/number-format.html for
- * output examples.
- *
- * @param {number} x The number to format
- * @param {number=} opt_precision The precision to use, default 2.
- * @return {string} A string formatted like %g in printf. The max generated
- * string length should be precision + 6 (e.g 1.123e+300).
- */
-Dygraph.floatFormat = function(x, opt_precision) {
- // Avoid invalid precision values; [1, 21] is the valid range.
- var p = Math.min(Math.max(1, opt_precision || 2), 21);
-
- // This is deceptively simple. The actual algorithm comes from:
- //
- // Max allowed length = p + 4
- // where 4 comes from 'e+n' and '.'.
- //
- // Length of fixed format = 2 + y + p
- // where 2 comes from '0.' and y = # of leading zeroes.
- //
- // Equating the two and solving for y yields y = 2, or 0.00xxxx which is
- // 1.0e-3.
- //
- // Since the behavior of toPrecision() is identical for larger numbers, we
- // don't have to worry about the other bound.
- //
- // Finally, the argument for toExponential() is the number of trailing digits,
- // so we take off 1 for the value before the '.'.
- return (Math.abs(x) < 1.0e-3 && x !== 0.0) ?
- x.toExponential(p - 1) : x.toPrecision(p);
-};
-
-/**
- * Converts '9' to '09' (useful for dates)
- * @param {number} x
- * @return {string}
- * @private
- */
-Dygraph.zeropad = function(x) {
- if (x < 10) return "0" + x; else return "" + x;
-};
-
-/**
- * Date accessors to get the parts of a calendar date (year, month,
- * day, hour, minute, second and millisecond) according to local time,
- * and factory method to call the Date constructor with an array of arguments.
- */
-Dygraph.DateAccessorsLocal = {
- getFullYear: function(d) {return d.getFullYear();},
- getMonth: function(d) {return d.getMonth();},
- getDate: function(d) {return d.getDate();},
- getHours: function(d) {return d.getHours();},
- getMinutes: function(d) {return d.getMinutes();},
- getSeconds: function(d) {return d.getSeconds();},
- getMilliseconds: function(d) {return d.getMilliseconds();},
- getDay: function(d) {return d.getDay();},
- makeDate: function(y, m, d, hh, mm, ss, ms) {
- return new Date(y, m, d, hh, mm, ss, ms);
- }
-};
-
-/**
- * Date accessors to get the parts of a calendar date (year, month,
- * day of month, hour, minute, second and millisecond) according to UTC time,
- * and factory method to call the Date constructor with an array of arguments.
- */
-Dygraph.DateAccessorsUTC = {
- getFullYear: function(d) {return d.getUTCFullYear();},
- getMonth: function(d) {return d.getUTCMonth();},
- getDate: function(d) {return d.getUTCDate();},
- getHours: function(d) {return d.getUTCHours();},
- getMinutes: function(d) {return d.getUTCMinutes();},
- getSeconds: function(d) {return d.getUTCSeconds();},
- getMilliseconds: function(d) {return d.getUTCMilliseconds();},
- getDay: function(d) {return d.getUTCDay();},
- makeDate: function(y, m, d, hh, mm, ss, ms) {
- return new Date(Date.UTC(y, m, d, hh, mm, ss, ms));
- }
-};
-
-/**
- * Return a string version of the hours, minutes and seconds portion of a date.
- * @param {number} hh The hours (from 0-23)
- * @param {number} mm The minutes (from 0-59)
- * @param {number} ss The seconds (from 0-59)
- * @return {string} A time of the form "HH:MM" or "HH:MM:SS"
- * @private
- */
-Dygraph.hmsString_ = function(hh, mm, ss) {
- var zeropad = Dygraph.zeropad;
- var ret = zeropad(hh) + ":" + zeropad(mm);
- if (ss) {
- ret += ":" + zeropad(ss);
- }
- return ret;
-};
-
-/**
- * Convert a JS date (millis since epoch) to a formatted string.
- * @param {number} time The JavaScript time value (ms since epoch)
- * @param {boolean} utc Wether output UTC or local time
- * @return {string} A date of one of these forms:
- * "YYYY/MM/DD", "YYYY/MM/DD HH:MM" or "YYYY/MM/DD HH:MM:SS"
- * @private
- */
-Dygraph.dateString_ = function(time, utc) {
- var zeropad = Dygraph.zeropad;
- var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal;
- var date = new Date(time);
- var y = accessors.getFullYear(date);
- var m = accessors.getMonth(date);
- var d = accessors.getDate(date);
- var hh = accessors.getHours(date);
- var mm = accessors.getMinutes(date);
- var ss = accessors.getSeconds(date);
- // Get a year string:
- var year = "" + y;
- // Get a 0 padded month string
- var month = zeropad(m + 1); //months are 0-offset, sigh
- // Get a 0 padded day string
- var day = zeropad(d);
- var frac = hh * 3600 + mm * 60 + ss;
- var ret = year + "/" + month + "/" + day;
- if (frac) {
- ret += " " + Dygraph.hmsString_(hh, mm, ss);
- }
- return ret;
-};
-
-/**
- * Round a number to the specified number of digits past the decimal point.
- * @param {number} num The number to round
- * @param {number} places The number of decimals to which to round
- * @return {number} The rounded number
- * @private
- */
-Dygraph.round_ = function(num, places) {
- var shift = Math.pow(10, places);
- return Math.round(num * shift)/shift;
-};
-
-/**
- * Implementation of binary search over an array.
- * Currently does not work when val is outside the range of arry's values.
- * @param {number} val the value to search for
- * @param {Array.<number>} arry is the value over which to search
- * @param {number} abs If abs > 0, find the lowest entry greater than val
- * If abs < 0, find the highest entry less than val.
- * If abs == 0, find the entry that equals val.
- * @param {number=} low The first index in arry to consider (optional)
- * @param {number=} high The last index in arry to consider (optional)
- * @return {number} Index of the element, or -1 if it isn't found.
- * @private
- */
-Dygraph.binarySearch = function(val, arry, abs, low, high) {
- if (low === null || low === undefined ||
- high === null || high === undefined) {
- low = 0;
- high = arry.length - 1;
- }
- if (low > high) {
- return -1;
- }
- if (abs === null || abs === undefined) {
- abs = 0;
- }
- var validIndex = function(idx) {
- return idx >= 0 && idx < arry.length;
- };
- var mid = parseInt((low + high) / 2, 10);
- var element = arry[mid];
- var idx;
- if (element == val) {
- return mid;
- } else if (element > val) {
- if (abs > 0) {
- // Accept if element > val, but also if prior element < val.
- idx = mid - 1;
- if (validIndex(idx) && arry[idx] < val) {
- return mid;
- }
- }
- return Dygraph.binarySearch(val, arry, abs, low, mid - 1);
- } else if (element < val) {
- if (abs < 0) {
- // Accept if element < val, but also if prior element > val.
- idx = mid + 1;
- if (validIndex(idx) && arry[idx] > val) {
- return mid;
- }
- }
- return Dygraph.binarySearch(val, arry, abs, mid + 1, high);
- }
- return -1; // can't actually happen, but makes closure compiler happy
-};
-
-/**
- * Parses a date, returning the number of milliseconds since epoch. This can be
- * passed in as an xValueParser in the Dygraph constructor.
- * TODO(danvk): enumerate formats that this understands.
- *
- * @param {string} dateStr A date in a variety of possible string formats.
- * @return {number} Milliseconds since epoch.
- * @private
- */
-Dygraph.dateParser = function(dateStr) {
- var dateStrSlashed;
- var d;
-
- // Let the system try the format first, with one caveat:
- // YYYY-MM-DD[ HH:MM:SS] is interpreted as UTC by a variety of browsers.
- // dygraphs displays dates in local time, so this will result in surprising
- // inconsistencies. But if you specify "T" or "Z" (i.e. YYYY-MM-DDTHH:MM:SS),
- // then you probably know what you're doing, so we'll let you go ahead.
- // Issue: http://code.google.com/p/dygraphs/issues/detail?id=255
- if (dateStr.search("-") == -1 ||
- dateStr.search("T") != -1 || dateStr.search("Z") != -1) {
- d = Dygraph.dateStrToMillis(dateStr);
- if (d && !isNaN(d)) return d;
- }
-
- if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12'
- dateStrSlashed = dateStr.replace("-", "/", "g");
- while (dateStrSlashed.search("-") != -1) {
- dateStrSlashed = dateStrSlashed.replace("-", "/");
- }
- d = Dygraph.dateStrToMillis(dateStrSlashed);
- } else if (dateStr.length == 8) { // e.g. '20090712'
- // TODO(danvk): remove support for this format. It's confusing.
- dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) + "/" +
- dateStr.substr(6,2);
- d = Dygraph.dateStrToMillis(dateStrSlashed);
- } else {
- // Any format that Date.parse will accept, e.g. "2009/07/12" or
- // "2009/07/12 12:34:56"
- d = Dygraph.dateStrToMillis(dateStr);
- }
-
- if (!d || isNaN(d)) {
- console.error("Couldn't parse " + dateStr + " as a date");
- }
- return d;
-};
-
-/**
- * This is identical to JavaScript's built-in Date.parse() method, except that
- * it doesn't get replaced with an incompatible method by aggressive JS
- * libraries like MooTools or Joomla.
- * @param {string} str The date string, e.g. "2011/05/06"
- * @return {number} millis since epoch
- * @private
- */
-Dygraph.dateStrToMillis = function(str) {
- return new Date(str).getTime();
-};
-
-// These functions are all based on MochiKit.
-/**
- * Copies all the properties from o to self.
- *
- * @param {!Object} self
- * @param {!Object} o
- * @return {!Object}
- */
-Dygraph.update = function(self, o) {
- if (typeof(o) != 'undefined' && o !== null) {
- for (var k in o) {
- if (o.hasOwnProperty(k)) {
- self[k] = o[k];
- }
- }
- }
- return self;
-};
-
-/**
- * Copies all the properties from o to self.
- *
- * @param {!Object} self
- * @param {!Object} o
- * @return {!Object}
- * @private
- */
-Dygraph.updateDeep = function (self, o) {
- // Taken from http://stackoverflow.com/questions/384286/javascript-isdom-how-do-you-check-if-a-javascript-object-is-a-dom-object
- function isNode(o) {
- return (
- typeof Node === "object" ? o instanceof Node :
- typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName==="string"
- );
- }
-
- if (typeof(o) != 'undefined' && o !== null) {
- for (var k in o) {
- if (o.hasOwnProperty(k)) {
- if (o[k] === null) {
- self[k] = null;
- } else if (Dygraph.isArrayLike(o[k])) {
- self[k] = o[k].slice();
- } else if (isNode(o[k])) {
- // DOM objects are shallowly-copied.
- self[k] = o[k];
- } else if (typeof(o[k]) == 'object') {
- if (typeof(self[k]) != 'object' || self[k] === null) {
- self[k] = {};
- }
- Dygraph.updateDeep(self[k], o[k]);
- } else {
- self[k] = o[k];
- }
- }
- }
- }
- return self;
-};
-
-/**
- * @param {*} o
- * @return {boolean}
- * @private
- */
-Dygraph.isArrayLike = function(o) {
- var typ = typeof(o);
- if (
- (typ != 'object' && !(typ == 'function' &&
- typeof(o.item) == 'function')) ||
- o === null ||
- typeof(o.length) != 'number' ||
- o.nodeType === 3
- ) {
- return false;
- }
- return true;
-};
-
-/**
- * @param {Object} o
- * @return {boolean}
- * @private
- */
-Dygraph.isDateLike = function (o) {
- if (typeof(o) != "object" || o === null ||
- typeof(o.getTime) != 'function') {
- return false;
- }
- return true;
-};
-
-/**
- * Note: this only seems to work for arrays.
- * @param {!Array} o
- * @return {!Array}
- * @private
- */
-Dygraph.clone = function(o) {
- // TODO(danvk): figure out how MochiKit's version works
- var r = [];
- for (var i = 0; i < o.length; i++) {
- if (Dygraph.isArrayLike(o[i])) {
- r.push(Dygraph.clone(o[i]));
- } else {
- r.push(o[i]);
- }
- }
- return r;
-};
-
-/**
- * Create a new canvas element.
- *
- * @return {!HTMLCanvasElement}
- * @private
- */
-Dygraph.createCanvas = function() {
- return document.createElement('canvas');
-};
-
-/**
- * Returns the context's pixel ratio, which is the ratio between the device
- * pixel ratio and the backing store ratio. Typically this is 1 for conventional
- * displays, and > 1 for HiDPI displays (such as the Retina MBP).
- * See http://www.html5rocks.com/en/tutorials/canvas/hidpi/ for more details.
- *
- * @param {!CanvasRenderingContext2D} context The canvas's 2d context.
- * @return {number} The ratio of the device pixel ratio and the backing store
- * ratio for the specified context.
- */
-Dygraph.getContextPixelRatio = function(context) {
- try {
- var devicePixelRatio = window.devicePixelRatio;
- var backingStoreRatio = context.webkitBackingStorePixelRatio ||
- context.mozBackingStorePixelRatio ||
- context.msBackingStorePixelRatio ||
- context.oBackingStorePixelRatio ||
- context.backingStorePixelRatio || 1;
- if (devicePixelRatio !== undefined) {
- return devicePixelRatio / backingStoreRatio;
- } else {
- // At least devicePixelRatio must be defined for this ratio to make sense.
- // We default backingStoreRatio to 1: this does not exist on some browsers
- // (i.e. desktop Chrome).
- return 1;
- }
- } catch (e) {
- return 1;
- }
-};
-
-/**
- * Checks whether the user is on an Android browser.
- * Android does not fully support the <canvas> tag, e.g. w/r/t/ clipping.
- * @return {boolean}
- * @private
- */
-Dygraph.isAndroid = function() {
- return (/Android/).test(navigator.userAgent);
-};
-
-
-/**
- * TODO(danvk): use @template here when it's better supported for classes.
- * @param {!Array} array
- * @param {number} start
- * @param {number} length
- * @param {function(!Array,?):boolean=} predicate
- * @constructor
- */
-Dygraph.Iterator = function(array, start, length, predicate) {
- start = start || 0;
- length = length || array.length;
- this.hasNext = true; // Use to identify if there's another element.
- this.peek = null; // Use for look-ahead
- this.start_ = start;
- this.array_ = array;
- this.predicate_ = predicate;
- this.end_ = Math.min(array.length, start + length);
- this.nextIdx_ = start - 1; // use -1 so initial advance works.
- this.next(); // ignoring result.
-};
-
-/**
- * @return {Object}
- */
-Dygraph.Iterator.prototype.next = function() {
- if (!this.hasNext) {
- return null;
- }
- var obj = this.peek;
-
- var nextIdx = this.nextIdx_ + 1;
- var found = false;
- while (nextIdx < this.end_) {
- if (!this.predicate_ || this.predicate_(this.array_, nextIdx)) {
- this.peek = this.array_[nextIdx];
- found = true;
- break;
- }
- nextIdx++;
- }
- this.nextIdx_ = nextIdx;
- if (!found) {
- this.hasNext = false;
- this.peek = null;
- }
- return obj;
-};
-
-/**
- * Returns a new iterator over array, between indexes start and
- * start + length, and only returns entries that pass the accept function
- *
- * @param {!Array} array the array to iterate over.
- * @param {number} start the first index to iterate over, 0 if absent.
- * @param {number} length the number of elements in the array to iterate over.
- * This, along with start, defines a slice of the array, and so length
- * doesn't imply the number of elements in the iterator when accept doesn't
- * always accept all values. array.length when absent.
- * @param {function(?):boolean=} opt_predicate a function that takes
- * parameters array and idx, which returns true when the element should be
- * returned. If omitted, all elements are accepted.
- * @private
- */
-Dygraph.createIterator = function(array, start, length, opt_predicate) {
- return new Dygraph.Iterator(array, start, length, opt_predicate);
-};
-
-// Shim layer with setTimeout fallback.
-// From: http://paulirish.com/2011/requestanimationframe-for-smart-animating/
-// Should be called with the window context:
-// Dygraph.requestAnimFrame.call(window, function() {})
-Dygraph.requestAnimFrame = (function() {
- return window.requestAnimationFrame ||
- window.webkitRequestAnimationFrame ||
- window.mozRequestAnimationFrame ||
- window.oRequestAnimationFrame ||
- window.msRequestAnimationFrame ||
- function (callback) {
- window.setTimeout(callback, 1000 / 60);
- };
-})();
-
-/**
- * Call a function at most maxFrames times at an attempted interval of
- * framePeriodInMillis, then call a cleanup function once. repeatFn is called
- * once immediately, then at most (maxFrames - 1) times asynchronously. If
- * maxFrames==1, then cleanup_fn() is also called synchronously. This function
- * is used to sequence animation.
- * @param {function(number)} repeatFn Called repeatedly -- takes the frame
- * number (from 0 to maxFrames-1) as an argument.
- * @param {number} maxFrames The max number of times to call repeatFn
- * @param {number} framePeriodInMillis Max requested time between frames.
- * @param {function()} cleanupFn A function to call after all repeatFn calls.
- * @private
- */
-Dygraph.repeatAndCleanup = function(repeatFn, maxFrames, framePeriodInMillis,
- cleanupFn) {
- var frameNumber = 0;
- var previousFrameNumber;
- var startTime = new Date().getTime();
- repeatFn(frameNumber);
- if (maxFrames == 1) {
- cleanupFn();
- return;
- }
- var maxFrameArg = maxFrames - 1;
-
- (function loop() {
- if (frameNumber >= maxFrames) return;
- Dygraph.requestAnimFrame.call(window, function() {
- // Determine which frame to draw based on the delay so far. Will skip
- // frames if necessary.
- var currentTime = new Date().getTime();
- var delayInMillis = currentTime - startTime;
- previousFrameNumber = frameNumber;
- frameNumber = Math.floor(delayInMillis / framePeriodInMillis);
- var frameDelta = frameNumber - previousFrameNumber;
- // If we predict that the subsequent repeatFn call will overshoot our
- // total frame target, so our last call will cause a stutter, then jump to
- // the last call immediately. If we're going to cause a stutter, better
- // to do it faster than slower.
- var predictOvershootStutter = (frameNumber + frameDelta) > maxFrameArg;
- if (predictOvershootStutter || (frameNumber >= maxFrameArg)) {
- repeatFn(maxFrameArg); // Ensure final call with maxFrameArg.
- cleanupFn();
- } else {
- if (frameDelta !== 0) { // Don't call repeatFn with duplicate frames.
- repeatFn(frameNumber);
- }
- loop();
- }
- });
- })();
-};
-
-// A whitelist of options that do not change pixel positions.
-var pixelSafeOptions = {
- 'annotationClickHandler': true,
- 'annotationDblClickHandler': true,
- 'annotationMouseOutHandler': true,
- 'annotationMouseOverHandler': true,
- 'axisLabelColor': true,
- 'axisLineColor': true,
- 'axisLineWidth': true,
- 'clickCallback': true,
- 'drawCallback': true,
- 'drawHighlightPointCallback': true,
- 'drawPoints': true,
- 'drawPointCallback': true,
- 'drawGrid': true,
- 'fillAlpha': true,
- 'gridLineColor': true,
- 'gridLineWidth': true,
- 'hideOverlayOnMouseOut': true,
- 'highlightCallback': true,
- 'highlightCircleSize': true,
- 'interactionModel': true,
- 'isZoomedIgnoreProgrammaticZoom': true,
- 'labelsDiv': true,
- 'labelsDivStyles': true,
- 'labelsDivWidth': true,
- 'labelsKMB': true,
- 'labelsKMG2': true,
- 'labelsSeparateLines': true,
- 'labelsShowZeroValues': true,
- 'legend': true,
- 'panEdgeFraction': true,
- 'pixelsPerYLabel': true,
- 'pointClickCallback': true,
- 'pointSize': true,
- 'rangeSelectorPlotFillColor': true,
- 'rangeSelectorPlotFillGradientColor': true,
- 'rangeSelectorPlotStrokeColor': true,
- 'rangeSelectorBackgroundStrokeColor': true,
- 'rangeSelectorBackgroundLineWidth': true,
- 'rangeSelectorPlotLineWidth': true,
- 'rangeSelectorForegroundStrokeColor': true,
- 'rangeSelectorForegroundLineWidth': true,
- 'rangeSelectorAlpha': true,
- 'showLabelsOnHighlight': true,
- 'showRoller': true,
- 'strokeWidth': true,
- 'underlayCallback': true,
- 'unhighlightCallback': true,
- 'zoomCallback': true
-};
-
-/**
- * This function will scan the option list and determine if they
- * require us to recalculate the pixel positions of each point.
- * TODO: move this into dygraph-options.js
- * @param {!Array.<string>} labels a list of options to check.
- * @param {!Object} attrs
- * @return {boolean} true if the graph needs new points else false.
- * @private
- */
-Dygraph.isPixelChangingOptionList = function(labels, attrs) {
- // Assume that we do not require new points.
- // This will change to true if we actually do need new points.
-
- // Create a dictionary of series names for faster lookup.
- // If there are no labels, then the dictionary stays empty.
- var seriesNamesDictionary = { };
- if (labels) {
- for (var i = 1; i < labels.length; i++) {
- seriesNamesDictionary[labels[i]] = true;
- }
- }
-
- // Scan through a flat (i.e. non-nested) object of options.
- // Returns true/false depending on whether new points are needed.
- var scanFlatOptions = function(options) {
- for (var property in options) {
- if (options.hasOwnProperty(property) &&
- !pixelSafeOptions[property]) {
- return true;
- }
- }
- return false;
- };
-
- // Iterate through the list of updated options.
- for (var property in attrs) {
- if (!attrs.hasOwnProperty(property)) continue;
-
- // Find out of this field is actually a series specific options list.
- if (property == 'highlightSeriesOpts' ||
- (seriesNamesDictionary[property] && !attrs.series)) {
- // This property value is a list of options for this series.
- if (scanFlatOptions(attrs[property])) return true;
- } else if (property == 'series' || property == 'axes') {
- // This is twice-nested options list.
- var perSeries = attrs[property];
- for (var series in perSeries) {
- if (perSeries.hasOwnProperty(series) &&
- scanFlatOptions(perSeries[series])) {
- return true;
- }
- }
- } else {
- // If this was not a series specific option list, check if it's a pixel
- // changing property.
- if (!pixelSafeOptions[property]) return true;
- }
- }
-
- return false;
-};
-
-Dygraph.Circles = {
- DEFAULT : function(g, name, ctx, canvasx, canvasy, color, radius) {
- ctx.beginPath();
- ctx.fillStyle = color;
- ctx.arc(canvasx, canvasy, radius, 0, 2 * Math.PI, false);
- ctx.fill();
- }
- // For more shapes, include extras/shapes.js
-};
-
-/**
- * To create a "drag" interaction, you typically register a mousedown event
- * handler on the element where the drag begins. In that handler, you register a
- * mouseup handler on the window to determine when the mouse is released,
- * wherever that release happens. This works well, except when the user releases
- * the mouse over an off-domain iframe. In that case, the mouseup event is
- * handled by the iframe and never bubbles up to the window handler.
- *
- * To deal with this issue, we cover iframes with high z-index divs to make sure
- * they don't capture mouseup.
- *
- * Usage:
- * element.addEventListener('mousedown', function() {
- * var tarper = new Dygraph.IFrameTarp();
- * tarper.cover();
- * var mouseUpHandler = function() {
- * ...
- * window.removeEventListener(mouseUpHandler);
- * tarper.uncover();
- * };
- * window.addEventListener('mouseup', mouseUpHandler);
- * };
- *
- * @constructor
- */
-Dygraph.IFrameTarp = function() {
- /** @type {Array.<!HTMLDivElement>} */
- this.tarps = [];
-};
-
-/**
- * Find all the iframes in the document and cover them with high z-index
- * transparent divs.
- */
-Dygraph.IFrameTarp.prototype.cover = function() {
- var iframes = document.getElementsByTagName("iframe");
- for (var i = 0; i < iframes.length; i++) {
- var iframe = iframes[i];
- var pos = Dygraph.findPos(iframe),
- x = pos.x,
- y = pos.y,
- width = iframe.offsetWidth,
- height = iframe.offsetHeight;
-
- var div = document.createElement("div");
- div.style.position = "absolute";
- div.style.left = x + 'px';
- div.style.top = y + 'px';
- div.style.width = width + 'px';
- div.style.height = height + 'px';
- div.style.zIndex = 999;
- document.body.appendChild(div);
- this.tarps.push(div);
- }
-};
-
-/**
- * Remove all the iframe covers. You should call this in a mouseup handler.
- */
-Dygraph.IFrameTarp.prototype.uncover = function() {
- for (var i = 0; i < this.tarps.length; i++) {
- this.tarps[i].parentNode.removeChild(this.tarps[i]);
- }
- this.tarps = [];
-};
-
-/**
- * Determine whether |data| is delimited by CR, CRLF, LF, LFCR.
- * @param {string} data
- * @return {?string} the delimiter that was detected (or null on failure).
- */
-Dygraph.detectLineDelimiter = function(data) {
- for (var i = 0; i < data.length; i++) {
- var code = data.charAt(i);
- if (code === '\r') {
- // Might actually be "\r\n".
- if (((i + 1) < data.length) && (data.charAt(i + 1) === '\n')) {
- return '\r\n';
- }
- return code;
- }
- if (code === '\n') {
- // Might actually be "\n\r".
- if (((i + 1) < data.length) && (data.charAt(i + 1) === '\r')) {
- return '\n\r';
- }
- return code;
- }
- }
-
- return null;
-};
-
-/**
- * Is one node contained by another?
- * @param {Node} containee The contained node.
- * @param {Node} container The container node.
- * @return {boolean} Whether containee is inside (or equal to) container.
- * @private
- */
-Dygraph.isNodeContainedBy = function(containee, container) {
- if (container === null || containee === null) {
- return false;
- }
- var containeeNode = /** @type {Node} */ (containee);
- while (containeeNode && containeeNode !== container) {
- containeeNode = containeeNode.parentNode;
- }
- return (containeeNode === container);
-};
-
-
-// This masks some numeric issues in older versions of Firefox,
-// where 1.0/Math.pow(10,2) != Math.pow(10,-2).
-/** @type {function(number,number):number} */
-Dygraph.pow = function(base, exp) {
- if (exp < 0) {
- return 1.0 / Math.pow(base, -exp);
- }
- return Math.pow(base, exp);
-};
-
-/**
- * Converts any valid CSS color (hex, rgb(), named color) to an RGB tuple.
- *
- * @param {!string} colorStr Any valid CSS color string.
- * @return {{r:number,g:number,b:number}} Parsed RGB tuple.
- * @private
- */
-Dygraph.toRGB_ = function(colorStr) {
- // TODO(danvk): cache color parses to avoid repeated DOM manipulation.
- var div = document.createElement('div');
- div.style.backgroundColor = colorStr;
- div.style.visibility = 'hidden';
- document.body.appendChild(div);
- var rgbStr = window.getComputedStyle(div, null).backgroundColor;
- document.body.removeChild(div);
- var bits = /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/.exec(rgbStr);
- return {
- r: parseInt(bits[1], 10),
- g: parseInt(bits[2], 10),
- b: parseInt(bits[3], 10)
- };
-};
-
-/**
- * Checks whether the browser supports the <canvas> tag.
- * @param {HTMLCanvasElement=} opt_canvasElement Pass a canvas element as an
- * optimization if you have one.
- * @return {boolean} Whether the browser supports canvas.
- */
-Dygraph.isCanvasSupported = function(opt_canvasElement) {
- try {
- var canvas = opt_canvasElement || document.createElement("canvas");
- canvas.getContext("2d");
- } catch (e) {
- return false;
- }
- return true;
-};
-
-/**
- * Parses the value as a floating point number. This is like the parseFloat()
- * built-in, but with a few differences:
- * - the empty string is parsed as null, rather than NaN.
- * - if the string cannot be parsed at all, an error is logged.
- * If the string can't be parsed, this method returns null.
- * @param {string} x The string to be parsed
- * @param {number=} opt_line_no The line number from which the string comes.
- * @param {string=} opt_line The text of the line from which the string comes.
- */
-Dygraph.parseFloat_ = function(x, opt_line_no, opt_line) {
- var val = parseFloat(x);
- if (!isNaN(val)) return val;
-
- // Try to figure out what happeend.
- // If the value is the empty string, parse it as null.
- if (/^ *$/.test(x)) return null;
-
- // If it was actually "NaN", return it as NaN.
- if (/^ *nan *$/i.test(x)) return NaN;
-
- // Looks like a parsing error.
- var msg = "Unable to parse '" + x + "' as a number";
- if (opt_line !== undefined && opt_line_no !== undefined) {
- msg += " on line " + (1+(opt_line_no||0)) + " ('" + opt_line + "') of CSV.";
- }
- console.error(msg);
-
- return null;
-};
-
-})();
projects / dygraphs.git / blobdiff