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vega-util

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vega-util - npm Package Compare versions

Comparing version 1.5.0 to 1.6.0

src/transform.js

84

build/vega-util.js

@@ -171,2 +171,72 @@ (function (global, factory) {

var peek = function(array) {
return array[array.length - 1];
};
var toNumber = function(_) {
return _ == null || _ === '' ? null : +_;
};
function exp(sign) {
return function(x) { return sign * Math.exp(x); };
}
function log$1(sign) {
return function(x) { return Math.log(sign * x); };
}
function pow(exponent) {
return function(x) {
return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
};
}
function pan(domain, delta, lift, ground) {
var d0 = lift(domain[0]),
d1 = lift(peek(domain)),
dd = (d1 - d0) * delta;
return [
ground(d0 - dd),
ground(d1 - dd)
];
}
function panLinear(domain, delta) {
return pan(domain, delta, toNumber, identity);
}
function panLog(domain, delta) {
var sign = Math.sign(domain[0]);
return pan(domain, delta, log$1(sign), exp(sign));
}
function panPow(domain, delta, exponent) {
return pan(domain, delta, pow(exponent), pow(1/exponent));
}
function zoom(domain, anchor, scale, lift, ground) {
var d0 = lift(domain[0]),
d1 = lift(peek(domain)),
da = anchor != null ? lift(anchor) : (d0 + d1) / 2;
return [
ground(da + (d0 - da) * scale),
ground(da + (d1 - da) * scale)
];
}
function zoomLinear(domain, anchor, scale) {
return zoom(domain, anchor, scale, toNumber, identity);
}
function zoomLog(domain, anchor, scale) {
var sign = Math.sign(domain[0]);
return zoom(domain, anchor, scale, log$1(sign), exp(sign));
}
function zoomPow(domain, anchor, scale, exponent) {
return zoom(domain, anchor, scale, pow(exponent), pow(1/exponent));
}
var array = function(_) {

@@ -473,6 +543,2 @@ return _ != null ? (isArray(_) ? _ : [_]) : [];

var peek = function(array) {
return array[array.length - 1];
};
var toBoolean = function(_) {

@@ -491,6 +557,2 @@ return _ == null || _ === '' ? null : !_ || _ === 'false' || _ === '0' ? false : !!_;

var toNumber = function(_) {
return _ == null || _ === '' ? null : +_;
};
var toString = function(_) {

@@ -545,2 +607,8 @@ return _ == null || _ === '' ? null : _ + '';

exports.Debug = Debug;
exports.panLinear = panLinear;
exports.panLog = panLog;
exports.panPow = panPow;
exports.zoomLinear = zoomLinear;
exports.zoomLog = zoomLog;
exports.zoomPow = zoomPow;
exports.array = array;

@@ -547,0 +615,0 @@ exports.compare = compare;

2

build/vega-util.min.js

@@ -1,1 +0,1 @@

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9

index.js

@@ -25,2 +25,11 @@ export {

export {
panLinear,
panLog,
panPow,
zoomLinear,
zoomLog,
zoomPow
} from './src/transform';
export {default as array} from './src/array';

@@ -27,0 +36,0 @@ export {default as compare} from './src/compare';

2

package.json
{
"name": "vega-util",
"version": "1.5.0",
"version": "1.6.0",
"description": "JavaScript utilities for Vega.",

@@ -5,0 +5,0 @@ "keywords": [

84

README.md

@@ -337,13 +337,5 @@ # vega-util

<a name="peek" href="#peek">#</a>
vega.<b>peek</b>(<i>array</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/peek.js "Source")
Returns the last element in the input *array*. Similar to the built-in
`Array.pop` method, except that it does not remove the last element. This
method is a convenient shorthand for `array[array.length - 1]`.
<a name="merge" href="#merge">#</a>
vega.<b>merge</b>(<i>compare</i>, <i>array1</i>, <i>array2</i>[, <i>output</i>])
[<>](https://github.com/vega/vega-util/blob/master/src/peek.js "Source")
[<>](https://github.com/vega/vega-util/blob/master/src/merge.js "Source")

@@ -356,2 +348,44 @@ Merge two sorted arrays into a single sorted array. The input *compare*

<a name="panLinear" href="#panLinear">#</a>
vega.<b>panLinear</b>(<i>domain</i>, <i>delta</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/transform.js "Source")
Given an input numeric _domain_ (sorted in increasing order), returns a
new domain array that translates the domain by a _delta_ using a linear
transform. The _delta_ value is expressed as a fraction of the current
domain span, and may be positive or negative to indicate the translation
direction. The return value is a two-element array indicating the starting
and ending value of the translated (panned) domain.
<a name="panLog" href="#panLog">#</a>
vega.<b>panLog</b>(<i>domain</i>, <i>delta</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/transform.js "Source")
Given an input numeric _domain_ (sorted in increasing order), returns a
new domain array that translates the domain by a _delta_ using a logarithmic
transform. The _delta_ value is expressed as a fraction of the current
domain span, and may be positive or negative to indicate the translation
direction. The return value is a two-element array indicating the starting
and ending value of the translated (panned) domain.
<a name="panPow" href="#panPow">#</a>
vega.<b>panPow</b>(<i>domain</i>, <i>delta</i>, <i>exponent</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/transform.js "Source")
Given an input numeric _domain_ (sorted in increasing order), returns a
new domain array that translates the domain by a _delta_ using a power
scale transform parameterized by the provided _exponent_. The _delta_ value
is expressed as a fraction of the current domain span, and may be positive
or negative to indicate the translation direction. The return value is a
two-element array indicating the starting and ending value of the
translated (panned) domain.
<a name="peek" href="#peek">#</a>
vega.<b>peek</b>(<i>array</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/peek.js "Source")
Returns the last element in the input *array*. Similar to the built-in
`Array.pop` method, except that it does not remove the last element. This
method is a convenient shorthand for `array[array.length - 1]`.
<a name="toSet" href="#toSet">#</a>

@@ -393,3 +427,35 @@ vega.<b>toSet</b>(<i>array</i>)

<a name="zoomLinear" href="#zoomLinear">#</a>
vega.<b>zoomLinear</b>(<i>domain</i>, <i>anchor</i>, <i>scale</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/transform.js "Source")
Given an input numeric _domain_ (sorted in increasing order), returns a
new domain array that scales (zooms) the domain by a _scale_ factor using
a linear transform, centered on the given _anchor_ value. If _anchor_ is
`null`, the midpoint of the domain is used instead. The return value is a
two-element array indicating the starting and ending value of the
scaled (zoomed) domain.
<a name="zoomLog" href="#zoomLog">#</a>
vega.<b>zoomLog</b>(<i>domain</i>, <i>anchor</i>, <i>scale</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/transform.js "Source")
Given an input numeric _domain_ (sorted in increasing order), returns a
new domain array that scales (zooms) the domain by a _scale_ factor using
a logarithmic transform, centered on the given _anchor_ value. If _anchor_
is `null`, the midpoint of the domain is used instead. The return value is
a two-element array indicating the starting and ending value of the
scaled (zoomed) domain.
<a name="zoomPow" href="#zoomPow">#</a>
vega.<b>zoomPow</b>(<i>domain</i>, <i>anchor</i>, <i>scale</i>, <i>exponent</i>)
[<>](https://github.com/vega/vega-util/blob/master/src/transform.js "Source")
Given an input numeric _domain_ (sorted in increasing order), returns a
new domain array that scales (zooms) the domain by a _scale_ factor using
a power scale transform parameterized by the provided _exponent_, centered
on the given _anchor_ value. If _anchor_ is `null`, the midpoint of the
domain is used instead. The return value is a two-element array indicating
the starting and ending value of the scaled (zoomed) domain.
### Strings

@@ -396,0 +462,0 @@ 

.npmignore
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