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index.js
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'use strict';
var d3 = require('@plotly/d3');
var utcFormat = require('d3-time-format').utcFormat;
var d3Format = require('d3-format').format;
var isNumeric = require('fast-isnumeric');
var numConstants = require('../constants/numerical');
var MAX_SAFE = numConstants.FP_SAFE;
var MIN_SAFE = -MAX_SAFE;
var BADNUM = numConstants.BADNUM;
var lib = module.exports = {};
lib.adjustFormat = function adjustFormat(formatStr) {
if(
!formatStr ||
/^\d[.]\df/.test(formatStr) ||
/[.]\d%/.test(formatStr)
) return formatStr;
if(formatStr === '0.f') return '~f';
if(/^\d%/.test(formatStr)) return '~%';
if(/^\ds/.test(formatStr)) return '~s';
// try adding tilde to the start of format in order to trim
if(!(/^[~,.0$]/.test(formatStr)) && /[&fps]/.test(formatStr)) return '~' + formatStr;
return formatStr;
};
var seenBadFormats = {};
lib.warnBadFormat = function(f) {
var key = String(f);
if(!seenBadFormats[key]) {
seenBadFormats[key] = 1;
lib.warn('encountered bad format: "' + key + '"');
}
};
lib.noFormat = function(value) {
return String(value);
};
lib.numberFormat = function(formatStr) {
var fn;
try {
fn = d3Format(lib.adjustFormat(formatStr));
} catch(e) {
lib.warnBadFormat(formatStr);
return lib.noFormat;
}
return fn;
};
lib.nestedProperty = require('./nested_property');
lib.keyedContainer = require('./keyed_container');
lib.relativeAttr = require('./relative_attr');
lib.isPlainObject = require('./is_plain_object');
lib.toLogRange = require('./to_log_range');
lib.relinkPrivateKeys = require('./relink_private');
var arrayModule = require('./array');
lib.isTypedArray = arrayModule.isTypedArray;
lib.isArrayOrTypedArray = arrayModule.isArrayOrTypedArray;
lib.isArray1D = arrayModule.isArray1D;
lib.ensureArray = arrayModule.ensureArray;
lib.concat = arrayModule.concat;
lib.maxRowLength = arrayModule.maxRowLength;
lib.minRowLength = arrayModule.minRowLength;
var modModule = require('./mod');
lib.mod = modModule.mod;
lib.modHalf = modModule.modHalf;
var coerceModule = require('./coerce');
lib.valObjectMeta = coerceModule.valObjectMeta;
lib.coerce = coerceModule.coerce;
lib.coerce2 = coerceModule.coerce2;
lib.coerceFont = coerceModule.coerceFont;
lib.coercePattern = coerceModule.coercePattern;
lib.coerceHoverinfo = coerceModule.coerceHoverinfo;
lib.coerceSelectionMarkerOpacity = coerceModule.coerceSelectionMarkerOpacity;
lib.validate = coerceModule.validate;
var datesModule = require('./dates');
lib.dateTime2ms = datesModule.dateTime2ms;
lib.isDateTime = datesModule.isDateTime;
lib.ms2DateTime = datesModule.ms2DateTime;
lib.ms2DateTimeLocal = datesModule.ms2DateTimeLocal;
lib.cleanDate = datesModule.cleanDate;
lib.isJSDate = datesModule.isJSDate;
lib.formatDate = datesModule.formatDate;
lib.incrementMonth = datesModule.incrementMonth;
lib.dateTick0 = datesModule.dateTick0;
lib.dfltRange = datesModule.dfltRange;
lib.findExactDates = datesModule.findExactDates;
lib.MIN_MS = datesModule.MIN_MS;
lib.MAX_MS = datesModule.MAX_MS;
var searchModule = require('./search');
lib.findBin = searchModule.findBin;
lib.sorterAsc = searchModule.sorterAsc;
lib.sorterDes = searchModule.sorterDes;
lib.distinctVals = searchModule.distinctVals;
lib.roundUp = searchModule.roundUp;
lib.sort = searchModule.sort;
lib.findIndexOfMin = searchModule.findIndexOfMin;
lib.sortObjectKeys = require('./sort_object_keys');
var statsModule = require('./stats');
lib.aggNums = statsModule.aggNums;
lib.len = statsModule.len;
lib.mean = statsModule.mean;
lib.median = statsModule.median;
lib.midRange = statsModule.midRange;
lib.variance = statsModule.variance;
lib.stdev = statsModule.stdev;
lib.interp = statsModule.interp;
var matrixModule = require('./matrix');
lib.init2dArray = matrixModule.init2dArray;
lib.transposeRagged = matrixModule.transposeRagged;
lib.dot = matrixModule.dot;
lib.translationMatrix = matrixModule.translationMatrix;
lib.rotationMatrix = matrixModule.rotationMatrix;
lib.rotationXYMatrix = matrixModule.rotationXYMatrix;
lib.apply3DTransform = matrixModule.apply3DTransform;
lib.apply2DTransform = matrixModule.apply2DTransform;
lib.apply2DTransform2 = matrixModule.apply2DTransform2;
lib.convertCssMatrix = matrixModule.convertCssMatrix;
lib.inverseTransformMatrix = matrixModule.inverseTransformMatrix;
var anglesModule = require('./angles');
lib.deg2rad = anglesModule.deg2rad;
lib.rad2deg = anglesModule.rad2deg;
lib.angleDelta = anglesModule.angleDelta;
lib.angleDist = anglesModule.angleDist;
lib.isFullCircle = anglesModule.isFullCircle;
lib.isAngleInsideSector = anglesModule.isAngleInsideSector;
lib.isPtInsideSector = anglesModule.isPtInsideSector;
lib.pathArc = anglesModule.pathArc;
lib.pathSector = anglesModule.pathSector;
lib.pathAnnulus = anglesModule.pathAnnulus;
var anchorUtils = require('./anchor_utils');
lib.isLeftAnchor = anchorUtils.isLeftAnchor;
lib.isCenterAnchor = anchorUtils.isCenterAnchor;
lib.isRightAnchor = anchorUtils.isRightAnchor;
lib.isTopAnchor = anchorUtils.isTopAnchor;
lib.isMiddleAnchor = anchorUtils.isMiddleAnchor;
lib.isBottomAnchor = anchorUtils.isBottomAnchor;
var geom2dModule = require('./geometry2d');
lib.segmentsIntersect = geom2dModule.segmentsIntersect;
lib.segmentDistance = geom2dModule.segmentDistance;
lib.getTextLocation = geom2dModule.getTextLocation;
lib.clearLocationCache = geom2dModule.clearLocationCache;
lib.getVisibleSegment = geom2dModule.getVisibleSegment;
lib.findPointOnPath = geom2dModule.findPointOnPath;
var extendModule = require('./extend');
lib.extendFlat = extendModule.extendFlat;
lib.extendDeep = extendModule.extendDeep;
lib.extendDeepAll = extendModule.extendDeepAll;
lib.extendDeepNoArrays = extendModule.extendDeepNoArrays;
var loggersModule = require('./loggers');
lib.log = loggersModule.log;
lib.warn = loggersModule.warn;
lib.error = loggersModule.error;
var regexModule = require('./regex');
lib.counterRegex = regexModule.counter;
var throttleModule = require('./throttle');
lib.throttle = throttleModule.throttle;
lib.throttleDone = throttleModule.done;
lib.clearThrottle = throttleModule.clear;
var domModule = require('./dom');
lib.getGraphDiv = domModule.getGraphDiv;
lib.isPlotDiv = domModule.isPlotDiv;
lib.removeElement = domModule.removeElement;
lib.addStyleRule = domModule.addStyleRule;
lib.addRelatedStyleRule = domModule.addRelatedStyleRule;
lib.deleteRelatedStyleRule = domModule.deleteRelatedStyleRule;
lib.getFullTransformMatrix = domModule.getFullTransformMatrix;
lib.getElementTransformMatrix = domModule.getElementTransformMatrix;
lib.getElementAndAncestors = domModule.getElementAndAncestors;
lib.equalDomRects = domModule.equalDomRects;
lib.clearResponsive = require('./clear_responsive');
lib.preserveDrawingBuffer = require('./preserve_drawing_buffer');
lib.makeTraceGroups = require('./make_trace_groups');
lib._ = require('./localize');
lib.notifier = require('./notifier');
lib.filterUnique = require('./filter_unique');
lib.filterVisible = require('./filter_visible');
lib.pushUnique = require('./push_unique');
lib.increment = require('./increment');
lib.cleanNumber = require('./clean_number');
lib.ensureNumber = function ensureNumber(v) {
if(!isNumeric(v)) return BADNUM;
v = Number(v);
return (v > MAX_SAFE || v < MIN_SAFE) ? BADNUM : v;
};
/**
* Is v a valid array index? Accepts numeric strings as well as numbers.
*
* @param {any} v: the value to test
* @param {Optional[integer]} len: the array length we are indexing
*
* @return {bool}: v is a valid array index
*/
lib.isIndex = function(v, len) {
if(len !== undefined && v >= len) return false;
return isNumeric(v) && (v >= 0) && (v % 1 === 0);
};
lib.noop = require('./noop');
lib.identity = require('./identity');
/**
* create an array of length 'cnt' filled with 'v' at all indices
*
* @param {any} v
* @param {number} cnt
* @return {array}
*/
lib.repeat = function(v, cnt) {
var out = new Array(cnt);
for(var i = 0; i < cnt; i++) {
out[i] = v;
}
return out;
};
/**
* swap x and y of the same attribute in container cont
* specify attr with a ? in place of x/y
* you can also swap other things than x/y by providing part1 and part2
*/
lib.swapAttrs = function(cont, attrList, part1, part2) {
if(!part1) part1 = 'x';
if(!part2) part2 = 'y';
for(var i = 0; i < attrList.length; i++) {
var attr = attrList[i];
var xp = lib.nestedProperty(cont, attr.replace('?', part1));
var yp = lib.nestedProperty(cont, attr.replace('?', part2));
var temp = xp.get();
xp.set(yp.get());
yp.set(temp);
}
};
/**
* SVG painter's algo worked around with reinsertion
*/
lib.raiseToTop = function raiseToTop(elem) {
elem.parentNode.appendChild(elem);
};
/**
* cancel a possibly pending transition; returned selection may be used by caller
*/
lib.cancelTransition = function(selection) {
return selection.transition().duration(0);
};
// constrain - restrict a number v to be between v0 and v1
lib.constrain = function(v, v0, v1) {
if(v0 > v1) return Math.max(v1, Math.min(v0, v));
return Math.max(v0, Math.min(v1, v));
};
/**
* do two bounding boxes from getBoundingClientRect,
* ie {left,right,top,bottom,width,height}, overlap?
* takes optional padding pixels
*/
lib.bBoxIntersect = function(a, b, pad) {
pad = pad || 0;
return (a.left <= b.right + pad &&
b.left <= a.right + pad &&
a.top <= b.bottom + pad &&
b.top <= a.bottom + pad);
};
/*
* simpleMap: alternative to Array.map that only
* passes on the element and up to 2 extra args you
* provide (but not the array index or the whole array)
*
* array: the array to map it to
* func: the function to apply
* x1, x2: optional extra args
*/
lib.simpleMap = function(array, func, x1, x2, opts) {
var len = array.length;
var out = new Array(len);
for(var i = 0; i < len; i++) out[i] = func(array[i], x1, x2, opts);
return out;
};
/**
* Random string generator
*
* @param {object} existing
* pass in strings to avoid as keys with truthy values
* @param {int} bits
* bits of information in the output string, default 24
* @param {int} base
* base of string representation, default 16. Should be a power of 2.
*/
lib.randstr = function randstr(existing, bits, base, _recursion) {
if(!base) base = 16;
if(bits === undefined) bits = 24;
if(bits <= 0) return '0';
var digits = Math.log(Math.pow(2, bits)) / Math.log(base);
var res = '';
var i, b, x;
for(i = 2; digits === Infinity; i *= 2) {
digits = Math.log(Math.pow(2, bits / i)) / Math.log(base) * i;
}
var rem = digits - Math.floor(digits);
for(i = 0; i < Math.floor(digits); i++) {
x = Math.floor(Math.random() * base).toString(base);
res = x + res;
}
if(rem) {
b = Math.pow(base, rem);
x = Math.floor(Math.random() * b).toString(base);
res = x + res;
}
var parsed = parseInt(res, base);
if((existing && existing[res]) ||
(parsed !== Infinity && parsed >= Math.pow(2, bits))) {
if(_recursion > 10) {
lib.warn('randstr failed uniqueness');
return res;
}
return randstr(existing, bits, base, (_recursion || 0) + 1);
} else return res;
};
lib.OptionControl = function(opt, optname) {
/*
* An environment to contain all option setters and
* getters that collectively modify opts.
*
* You can call up opts from any function in new object
* as this.optname || this.opt
*
* See FitOpts for example of usage
*/
if(!opt) opt = {};
if(!optname) optname = 'opt';
var self = {};
self.optionList = [];
self._newoption = function(optObj) {
optObj[optname] = opt;
self[optObj.name] = optObj;
self.optionList.push(optObj);
};
self['_' + optname] = opt;
return self;
};
/**
* lib.smooth: smooth arrayIn by convolving with
* a hann window with given full width at half max
* bounce the ends in, so the output has the same length as the input
*/
lib.smooth = function(arrayIn, FWHM) {
FWHM = Math.round(FWHM) || 0; // only makes sense for integers
if(FWHM < 2) return arrayIn;
var alen = arrayIn.length;
var alen2 = 2 * alen;
var wlen = 2 * FWHM - 1;
var w = new Array(wlen);
var arrayOut = new Array(alen);
var i;
var j;
var k;
var v;
// first make the window array
for(i = 0; i < wlen; i++) {
w[i] = (1 - Math.cos(Math.PI * (i + 1) / FWHM)) / (2 * FWHM);
}
// now do the convolution
for(i = 0; i < alen; i++) {
v = 0;
for(j = 0; j < wlen; j++) {
k = i + j + 1 - FWHM;
// multibounce
if(k < -alen) k -= alen2 * Math.round(k / alen2);
else if(k >= alen2) k -= alen2 * Math.floor(k / alen2);
// single bounce
if(k < 0) k = - 1 - k;
else if(k >= alen) k = alen2 - 1 - k;
v += arrayIn[k] * w[j];
}
arrayOut[i] = v;
}
return arrayOut;
};
/**
* syncOrAsync: run a sequence of functions synchronously
* as long as its returns are not promises (ie have no .then)
* includes one argument arg to send to all functions...
* this is mainly just to prevent us having to make wrapper functions
* when the only purpose of the wrapper is to reference gd
* and a final step to be executed at the end
* TODO: if there's an error and everything is sync,
* this doesn't happen yet because we want to make sure
* that it gets reported
*/
lib.syncOrAsync = function(sequence, arg, finalStep) {
var ret, fni;
function continueAsync() {
return lib.syncOrAsync(sequence, arg, finalStep);
}
while(sequence.length) {
fni = sequence.splice(0, 1)[0];
ret = fni(arg);
if(ret && ret.then) {
return ret.then(continueAsync);
}
}
return finalStep && finalStep(arg);
};
/**
* Helper to strip trailing slash, from
* http://stackoverflow.com/questions/6680825/return-string-without-trailing-slash
*/
lib.stripTrailingSlash = function(str) {
if(str.substr(-1) === '/') return str.substr(0, str.length - 1);
return str;
};
lib.noneOrAll = function(containerIn, containerOut, attrList) {
/**
* some attributes come together, so if you have one of them
* in the input, you should copy the default values of the others
* to the input as well.
*/
if(!containerIn) return;
var hasAny = false;
var hasAll = true;
var i;
var val;
for(i = 0; i < attrList.length; i++) {
val = containerIn[attrList[i]];
if(val !== undefined && val !== null) hasAny = true;
else hasAll = false;
}
if(hasAny && !hasAll) {
for(i = 0; i < attrList.length; i++) {
containerIn[attrList[i]] = containerOut[attrList[i]];
}
}
};
/** merges calcdata field (given by cdAttr) with traceAttr values
*
* N.B. Loop over minimum of cd.length and traceAttr.length
* i.e. it does not try to fill in beyond traceAttr.length-1
*
* @param {array} traceAttr : trace attribute
* @param {object} cd : calcdata trace
* @param {string} cdAttr : calcdata key
*/
lib.mergeArray = function(traceAttr, cd, cdAttr, fn) {
var hasFn = typeof fn === 'function';
if(lib.isArrayOrTypedArray(traceAttr)) {
var imax = Math.min(traceAttr.length, cd.length);
for(var i = 0; i < imax; i++) {
var v = traceAttr[i];
cd[i][cdAttr] = hasFn ? fn(v) : v;
}
}
};
// cast numbers to positive numbers, returns 0 if not greater than 0
lib.mergeArrayCastPositive = function(traceAttr, cd, cdAttr) {
return lib.mergeArray(traceAttr, cd, cdAttr, function(v) {
var w = +v;
return !isFinite(w) ? 0 : w > 0 ? w : 0;
});
};
/** fills calcdata field (given by cdAttr) with traceAttr values
* or function of traceAttr values (e.g. some fallback)
*
* N.B. Loops over all cd items.
*
* @param {array} traceAttr : trace attribute
* @param {object} cd : calcdata trace
* @param {string} cdAttr : calcdata key
* @param {function} [fn] : optional function to apply to each array item
*/
lib.fillArray = function(traceAttr, cd, cdAttr, fn) {
fn = fn || lib.identity;
if(lib.isArrayOrTypedArray(traceAttr)) {
for(var i = 0; i < cd.length; i++) {
cd[i][cdAttr] = fn(traceAttr[i]);
}
}
};
/** Handler for trace-wide vs per-point options
*
* @param {object} trace : (full) trace object
* @param {number} ptNumber : index of the point in question
* @param {string} astr : attribute string
* @param {function} [fn] : optional function to apply to each array item
*
* @return {any}
*/
lib.castOption = function(trace, ptNumber, astr, fn) {
fn = fn || lib.identity;
var val = lib.nestedProperty(trace, astr).get();
if(lib.isArrayOrTypedArray(val)) {
if(Array.isArray(ptNumber) && lib.isArrayOrTypedArray(val[ptNumber[0]])) {
return fn(val[ptNumber[0]][ptNumber[1]]);
} else {
return fn(val[ptNumber]);
}
} else {
return val;
}
};
/** Extract option from calcdata item, correctly falling back to
* trace value if not found.
*
* @param {object} calcPt : calcdata[i][j] item
* @param {object} trace : (full) trace object
* @param {string} calcKey : calcdata key
* @param {string} traceKey : aka trace attribute string
* @return {any}
*/
lib.extractOption = function(calcPt, trace, calcKey, traceKey) {
if(calcKey in calcPt) return calcPt[calcKey];
// fallback to trace value,
// must check if value isn't itself an array
// which means the trace attribute has a corresponding
// calcdata key, but its value is falsy
var traceVal = lib.nestedProperty(trace, traceKey).get();
if(!Array.isArray(traceVal)) return traceVal;
};
function makePtIndex2PtNumber(indexToPoints) {
var ptIndex2ptNumber = {};
for(var k in indexToPoints) {
var pts = indexToPoints[k];
for(var j = 0; j < pts.length; j++) {
ptIndex2ptNumber[pts[j]] = +k;
}
}
return ptIndex2ptNumber;
}
/** Tag selected calcdata items
*
* N.B. note that point 'index' corresponds to input data array index
* whereas 'number' is its post-transform version.
*
* @param {array} calcTrace
* @param {object} trace
* - selectedpoints {array}
* - _indexToPoints {object}
* @param {ptNumber2cdIndex} ptNumber2cdIndex (optional)
* optional map object for trace types that do not have 1-to-1 point number to
* calcdata item index correspondence (e.g. histogram)
*/
lib.tagSelected = function(calcTrace, trace, ptNumber2cdIndex) {
var selectedpoints = trace.selectedpoints;
var indexToPoints = trace._indexToPoints;
var ptIndex2ptNumber;
// make pt index-to-number map object, which takes care of transformed traces
if(indexToPoints) {
ptIndex2ptNumber = makePtIndex2PtNumber(indexToPoints);
}
function isCdIndexValid(v) {
return v !== undefined && v < calcTrace.length;
}
for(var i = 0; i < selectedpoints.length; i++) {
var ptIndex = selectedpoints[i];
if(lib.isIndex(ptIndex) ||
(lib.isArrayOrTypedArray(ptIndex) && lib.isIndex(ptIndex[0]) && lib.isIndex(ptIndex[1]))
) {
var ptNumber = ptIndex2ptNumber ? ptIndex2ptNumber[ptIndex] : ptIndex;
var cdIndex = ptNumber2cdIndex ? ptNumber2cdIndex[ptNumber] : ptNumber;
if(isCdIndexValid(cdIndex)) {
calcTrace[cdIndex].selected = 1;
}
}
}
};
lib.selIndices2selPoints = function(trace) {
var selectedpoints = trace.selectedpoints;
var indexToPoints = trace._indexToPoints;
if(indexToPoints) {
var ptIndex2ptNumber = makePtIndex2PtNumber(indexToPoints);
var out = [];
for(var i = 0; i < selectedpoints.length; i++) {
var ptIndex = selectedpoints[i];
if(lib.isIndex(ptIndex)) {
var ptNumber = ptIndex2ptNumber[ptIndex];
if(lib.isIndex(ptNumber)) {
out.push(ptNumber);
}
}
}
return out;
} else {
return selectedpoints;
}
};
/** Returns target as set by 'target' transform attribute
*
* @param {object} trace : full trace object
* @param {object} transformOpts : transform option object
* - target (string} :
* either an attribute string referencing an array in the trace object, or
* a set array.
*
* @return {array or false} : the target array (NOT a copy!!) or false if invalid
*/
lib.getTargetArray = function(trace, transformOpts) {
var target = transformOpts.target;
if(typeof target === 'string' && target) {
var array = lib.nestedProperty(trace, target).get();
return Array.isArray(array) ? array : false;
} else if(Array.isArray(target)) {
return target;
}
return false;
};
/**
* modified version of jQuery's extend to strip out private objs and functions,
* and cut arrays down to first <arraylen> or 1 elements
* because extend-like algorithms are hella slow
* obj2 is assumed to already be clean of these things (including no arrays)
*/
function minExtend(obj1, obj2, opt) {
var objOut = {};
if(typeof obj2 !== 'object') obj2 = {};
var arrayLen = opt === 'pieLike' ? -1 : 3;
var keys = Object.keys(obj1);
var i, k, v;
for(i = 0; i < keys.length; i++) {
k = keys[i];
v = obj1[k];
if(k.charAt(0) === '_' || typeof v === 'function') continue;
else if(k === 'module') objOut[k] = v;
else if(Array.isArray(v)) {
if(k === 'colorscale' || arrayLen === -1) {
objOut[k] = v.slice();
} else {
objOut[k] = v.slice(0, arrayLen);
}
} else if(lib.isTypedArray(v)) {
if(arrayLen === -1) {
objOut[k] = v.subarray();
} else {
objOut[k] = v.subarray(0, arrayLen);
}
} else if(v && (typeof v === 'object')) objOut[k] = minExtend(obj1[k], obj2[k], opt);
else objOut[k] = v;
}
keys = Object.keys(obj2);
for(i = 0; i < keys.length; i++) {
k = keys[i];
v = obj2[k];
if(typeof v !== 'object' || !(k in objOut) || typeof objOut[k] !== 'object') {
objOut[k] = v;
}
}
return objOut;
}
lib.minExtend = minExtend;
lib.titleCase = function(s) {
return s.charAt(0).toUpperCase() + s.substr(1);
};
lib.containsAny = function(s, fragments) {
for(var i = 0; i < fragments.length; i++) {
if(s.indexOf(fragments[i]) !== -1) return true;
}
return false;
};
lib.isIE = function() {
return typeof window.navigator.msSaveBlob !== 'undefined';
};
var IS_SAFARI_REGEX = /Version\/[\d\.]+.*Safari/;
lib.isSafari = function() {
return IS_SAFARI_REGEX.test(window.navigator.userAgent);
};
var IS_IOS_REGEX = /iPad|iPhone|iPod/;
lib.isIOS = function() {
return IS_IOS_REGEX.test(window.navigator.userAgent);
};
var FIREFOX_VERSION_REGEX = /Firefox\/(\d+)\.\d+/;
lib.getFirefoxVersion = function() {
var match = FIREFOX_VERSION_REGEX.exec(window.navigator.userAgent);
if(match && match.length === 2) {
var versionInt = parseInt(match[1]);
if(!isNaN(versionInt)) {
return versionInt;
}
}
return null;
};
lib.isD3Selection = function(obj) {
return obj instanceof d3.selection;
};
/**
* Append element to DOM only if not present.
*
* @param {d3 selection} parent : parent selection of the element in question
* @param {string} nodeType : node type of element to append
* @param {string} className (optional) : class name of element in question
* @param {fn} enterFn (optional) : optional fn applied to entering elements only
* @return {d3 selection} selection of new layer
*
* Previously, we were using the following pattern:
*
* ```
* var sel = parent.selectAll('.' + className)
* .data([0]);
*
* sel.enter().append(nodeType)
* .classed(className, true);
*
* return sel;
* ```
*
* in numerous places in our codebase to achieve the same behavior.
*
* The logic below performs much better, mostly as we are using
* `.select` instead `.selectAll` that is `querySelector` instead of
* `querySelectorAll`.
*
*/
lib.ensureSingle = function(parent, nodeType, className, enterFn) {
var sel = parent.select(nodeType + (className ? '.' + className : ''));
if(sel.size()) return sel;
var layer = parent.append(nodeType);
if(className) layer.classed(className, true);
if(enterFn) layer.call(enterFn);
return layer;
};
/**
* Same as Lib.ensureSingle, but using id as selector.
* This version is mostly used for clipPath nodes.
*
* @param {d3 selection} parent : parent selection of the element in question
* @param {string} nodeType : node type of element to append
* @param {string} id : id of element in question
* @param {fn} enterFn (optional) : optional fn applied to entering elements only
* @return {d3 selection} selection of new layer
*/
lib.ensureSingleById = function(parent, nodeType, id, enterFn) {
var sel = parent.select(nodeType + '#' + id);
if(sel.size()) return sel;
var layer = parent.append(nodeType).attr('id', id);
if(enterFn) layer.call(enterFn);
return layer;
};
/**
* Converts a string path to an object.
*
* When given a string containing an array element, it will create a `null`
* filled array of the given size.
*
* @example
* lib.objectFromPath('nested.test[2].path', 'value');
* // returns { nested: { test: [null, null, { path: 'value' }]}
*
* @param {string} path to nested value
* @param {*} any value to be set
*
* @return {Object} the constructed object with a full nested path
*/
lib.objectFromPath = function(path, value) {
var keys = path.split('.');
var tmpObj;
var obj = tmpObj = {};
for(var i = 0; i < keys.length; i++) {
var key = keys[i];
var el = null;
var parts = keys[i].match(/(.*)\[([0-9]+)\]/);
if(parts) {
key = parts[1];
el = parts[2];
tmpObj = tmpObj[key] = [];
if(i === keys.length - 1) {
tmpObj[el] = value;
} else {
tmpObj[el] = {};
}
tmpObj = tmpObj[el];
} else {
if(i === keys.length - 1) {
tmpObj[key] = value;
} else {
tmpObj[key] = {};
}
tmpObj = tmpObj[key];
}
}
return obj;
};
/**
* Iterate through an object in-place, converting dotted properties to objects.
*
* Examples:
*
* lib.expandObjectPaths({'nested.test.path': 'value'});
* => { nested: { test: {path: 'value'}}}
*
* It also handles array notation, e.g.:
*
* lib.expandObjectPaths({'foo[1].bar': 'value'});
* => { foo: [null, {bar: value}] }
*
* It handles merges the results when two properties are specified in parallel:
*
* lib.expandObjectPaths({'foo[1].bar': 10, 'foo[0].bar': 20});
* => { foo: [{bar: 10}, {bar: 20}] }
*
* It does NOT, however, merge multiple multiply-nested arrays::
*
* lib.expandObjectPaths({'marker[1].range[1]': 5, 'marker[1].range[0]': 4})
* => { marker: [null, {range: 4}] }
*/
// Store this to avoid recompiling regex on *every* prop since this may happen many
// many times for animations. Could maybe be inside the function. Not sure about
// scoping vs. recompilation tradeoff, but at least it's not just inlining it into
// the inner loop.
var dottedPropertyRegex = /^([^\[\.]+)\.(.+)?/;
var indexedPropertyRegex = /^([^\.]+)\[([0-9]+)\](\.)?(.+)?/;
lib.expandObjectPaths = function(data) {
var match, key, prop, datum, idx, dest, trailingPath;
if(typeof data === 'object' && !Array.isArray(data)) {
for(key in data) {
if(data.hasOwnProperty(key)) {
if((match = key.match(dottedPropertyRegex))) {
datum = data[key];
prop = match[1];
delete data[key];
data[prop] = lib.extendDeepNoArrays(data[prop] || {}, lib.objectFromPath(key, lib.expandObjectPaths(datum))[prop]);
} else if((match = key.match(indexedPropertyRegex))) {
datum = data[key];
prop = match[1];
idx = parseInt(match[2]);
delete data[key];
data[prop] = data[prop] || [];
if(match[3] === '.') {
// This is the case where theere are subsequent properties into which
// we must recurse, e.g. transforms[0].value
trailingPath = match[4];
dest = data[prop][idx] = data[prop][idx] || {};
// NB: Extend deep no arrays prevents this from working on multiple
// nested properties in the same object, e.g.
//
// {
// foo[0].bar[1].range
// foo[0].bar[0].range
// }
//
// In this case, the extendDeepNoArrays will overwrite one array with
// the other, so that both properties *will not* be present in the
// result. Fixing this would require a more intelligent tracking
// of changes and merging than extendDeepNoArrays currently accomplishes.
lib.extendDeepNoArrays(dest, lib.objectFromPath(trailingPath, lib.expandObjectPaths(datum)));
} else {
// This is the case where this property is the end of the line,
// e.g. xaxis.range[0]
data[prop][idx] = lib.expandObjectPaths(datum);
}
} else {
data[key] = lib.expandObjectPaths(data[key]);
}
}
}
}
return data;
};
/**
* Converts value to string separated by the provided separators.
*
* @example
* lib.numSeparate(2016, '.,');
* // returns '2016'
*
* @example
* lib.numSeparate(3000, '.,', true);
* // returns '3,000'
*
* @example
* lib.numSeparate(1234.56, '|,')
* // returns '1,234|56'
*
* @param {string|number} value the value to be converted
* @param {string} separators string of decimal, then thousands separators