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function configureRangeStep(type, _, count) {
if (type !== Band && type !== Point) {
error('Only band and point scales support rangeStep.');
}
// calculate full range based on requested step size and padding
var outer = (_.paddingOuter != null ? _.paddingOuter : _.padding) || 0,
inner = type === Point ? 1
: ((_.paddingInner != null ? _.paddingInner : _.padding) || 0);
return [0, _.rangeStep * bandSpace(count, inner, outer)];
}
// else if a range scheme is defined, use that
else if (_.scheme) {
range = configureScheme(type, _, count);
if (isFunction(range)) {
if (scale.interpolator) {
return scale.interpolator(range);
} else {
error(`Scale type ${type} does not support interpolating color schemes.`);
}
}
}
// given a range array for an interpolating scale, convert to interpolator
if (range && isInterpolating(type)) {
return scale.interpolator(
interpolateColors(flip(range, _.reverse), _.interpolate, _.interpolateGamma)
);
}
// configure rounding / interpolation
if (range && _.interpolate && scale.interpolate) {
scale.interpolate(getInterpolate(_.interpolate, _.interpolateGamma));
} else if (isFunction(scale.round)) {
scale.round(round);
} else if (isFunction(scale.rangeRound)) {
scale.interpolate(round ? interpolateRound : interpolate);
}
if (range) scale.range(flip(range, _.reverse));
}
function configureScheme(type, _, count) {
var extent = _.schemeExtent,
name, scheme;
if (isArray(_.scheme)) {
scheme = interpolateColors(_.scheme, _.interpolate, _.interpolateGamma);
} else {
name = _.scheme.toLowerCase();
scheme = getScheme(name);
if (!scheme) error(`Unrecognized scheme name: ${_.scheme}`);
}
// determine size for potential discrete range
count = (type === Threshold) ? count + 1
: (type === BinOrdinal) ? count - 1
: (type === Quantile || type === Quantize) ? (+_.schemeCount || DEFAULT_COUNT)
: count;
// adjust and/or quantize scheme as appropriate
return isInterpolating(type) ? adjustScheme(scheme, extent, _.reverse)
: isFunction(scheme) ? quantizeInterpolator(adjustScheme(scheme, extent), count)
: type === Ordinal ? scheme : scheme.slice(0, count);
if (isArray(_.scheme)) {
scheme = interpolateColors(_.scheme, _.interpolate, _.interpolateGamma);
} else {
name = _.scheme.toLowerCase();
scheme = getScheme(name);
if (!scheme) error(`Unrecognized scheme name: ${_.scheme}`);
}
// determine size for potential discrete range
count = (type === Threshold) ? count + 1
: (type === BinOrdinal) ? count - 1
: (type === Quantile || type === Quantize) ? (+_.schemeCount || DEFAULT_COUNT)
: count;
// adjust and/or quantize scheme as appropriate
return isInterpolating(type) ? adjustScheme(scheme, extent, _.reverse)
: isFunction(scheme) ? quantizeInterpolator(adjustScheme(scheme, extent), count)
: type === Ordinal ? scheme : scheme.slice(0, count);
}
}
// else if a range scheme is defined, use that
else if (_.scheme) {
range = configureScheme(type, _, count);
if (isFunction(range)) {
if (scale.interpolator) {
return scale.interpolator(range);
} else {
error(`Scale type ${type} does not support interpolating color schemes.`);
}
}
}
// given a range array for an interpolating scale, convert to interpolator
if (range && isInterpolating(type)) {
return scale.interpolator(
interpolateColors(flip(range, _.reverse), _.interpolate, _.interpolateGamma)
);
}
// configure rounding / interpolation
if (range && _.interpolate && scale.interpolate) {
scale.interpolate(getInterpolate(_.interpolate, _.interpolateGamma));
} else if (isFunction(scale.round)) {
scale.round(round);
} else if (isFunction(scale.rangeRound)) {
scale.interpolate(round ? interpolateRound : interpolate);
}
if (range) scale.range(flip(range, _.reverse));
}
function domainCheck(type, domain, df) {
if (isLogarithmic(type)) {
// sum signs of domain values
// if all pos or all neg, abs(sum) === domain.length
var s = Math.abs(domain.reduce(function(s, v) {
return s + (v < 0 ? -1 : v > 0 ? 1 : 0);
}, 0));
if (s !== domain.length) {
df.warn('Log scale domain includes zero: ' + stringValue(domain));
}
}
return domain;
}
export default function(scale, p0, p1, count, group) {
scale = getScale(scale, (group || this).context);
const gradient = Gradient(p0, p1);
let stops = scale.domain(),
min = stops[0],
max = peek(stops),
fraction = identity
if (!(max - min)) {
// expand scale if domain has zero span, fix #1479
scale = (scale.interpolator
? get('sequential')().interpolator(scale.interpolator())
: get('linear')().interpolate(scale.interpolate()).range(scale.range())
).domain([min=0, max=1]);
} else {
fraction = scaleFraction(scale, min, max);
}
if (scale.ticks) {
stops = scale.ticks(+count || 15);
if (min !== stops[0]) stops.unshift(min);
if (max !== peek(stops)) stops.push(max);
}
stops.forEach(_ => gradient.stop(fraction(_), scale(_)));
return gradient;
}
export default function(scale, p0, p1, count, group) {
scale = getScale(scale, (group || this).context);
const gradient = Gradient(p0, p1);
let stops = scale.domain(),
min = stops[0],
max = peek(stops),
fraction = identity
if (!(max - min)) {
// expand scale if domain has zero span, fix #1479
scale = (scale.interpolator
? get('sequential')().interpolator(scale.interpolator())
: get('linear')().interpolate(scale.interpolate()).range(scale.range())
).domain([min=0, max=1]);
} else {
fraction = scaleFraction(scale, min, max);
}
if (scale.ticks) {
stops = scale.ticks(+count || 15);
if (min !== stops[0]) stops.unshift(min);
if (max !== peek(stops)) stops.push(max);
}
stops.forEach(_ => gradient.stop(fraction(_), scale(_)));
return gradient;
}
if (!(mod || pulse.changed(pulse.ADD_REM) || Params.some(modp))) return;
var data = pulse.materialize(pulse.SOURCE).source,
layout = this.value,
as = _.as || Output,
fontSize = _.fontSize || 14,
range;
isFunction(fontSize)
? (range = _.fontSizeRange)
: (fontSize = constant(fontSize));
// create font size scaling function as needed
if (range) {
var fsize = fontSize,
sizeScale = scale('sqrt')()
.domain(extent(fsize, data))
.range(range);
fontSize = function(x) { return sizeScale(fsize(x)); };
}
data.forEach(function(t) {
t[as[0]] = NaN;
t[as[1]] = NaN;
t[as[3]] = 0;
});
// configure layout
var words = layout
.words(data)
.text(_.text)
.size(_.size || [500, 500])
prototype.transform = function(_, pulse) {
var df = pulse.dataflow,
scale = this.value,
key = scaleKey(_);
if (!scale || key !== scale.type) {
this.value = scale = getScale(key)();
}
for (key in _) if (!SKIP[key]) {
// padding is a scale property for band/point but not others
if (key === 'padding' && includePad(scale.type)) continue;
// invoke scale property setter, raise warning if not found
isFunction(scale[key])
? scale[key](_[key])
: df.warn('Unsupported scale property: ' + key);
}
configureRange(scale, _,
configureBins(scale, _, configureDomain(scale, _, df))
);
return pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS);