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chore: untangle continuous scales file
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@nickofthyme
nickofthyme committed Sep 30, 2021
1 parent a6aa2dd commit 252b94d
Showing 1 changed file with 138 additions and 138 deletions.
276 changes: 138 additions & 138 deletions packages/charts/src/scales/scale_continuous.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,136 @@ const SCALES = {
[ScaleType.Time]: scaleUtc,
};

const isUnitRange = ([r1, r2]: Range) => r1 === 0 && r2 === 1;

/** @internal */
export function limitLogScaleDomain([min, max]: ContinuousDomain, logMinLimit: number) {
// todo further simplify this
const absLimit = Math.abs(logMinLimit);
const fallback = absLimit || LOG_MIN_ABS_DOMAIN;
if (absLimit > 0 && min > 0 && min < absLimit) return max > absLimit ? [absLimit, max] : [absLimit, absLimit];
if (absLimit > 0 && max < 0 && max > -absLimit) return min < -absLimit ? [min, -absLimit] : [-absLimit, -absLimit];
if (min === 0) return max > 0 ? [fallback, max] : max < 0 ? [-fallback, max] : [fallback, fallback];
if (max === 0) return min > 0 ? [min, fallback] : min < 0 ? [min, -fallback] : [fallback, fallback];
if (min < 0 && max > 0) return Math.abs(max) >= Math.abs(min) ? [fallback, max] : [min, -fallback];
if (min > 0 && max < 0) return Math.abs(min) >= Math.abs(max) ? [min, fallback] : [-fallback, max];
return [min, max];
}

function getPixelPaddedDomain(
chartHeight: number,
domain: [number, number],
desiredPixelPadding: number,
constrainDomainPadding?: boolean,
intercept = 0,
) {
const inverted = domain[1] < domain[0];
const orderedDomain: [min: number, max: number] = inverted ? [domain[1], domain[0]] : domain;
const { scaleMultiplier } = screenspaceMarkerScaleCompressor(
orderedDomain,
[2 * desiredPixelPadding, 2 * desiredPixelPadding],
chartHeight,
);
const baselinePaddedDomainLo = orderedDomain[0] - desiredPixelPadding / scaleMultiplier;
const baselinePaddedDomainHigh = orderedDomain[1] + desiredPixelPadding / scaleMultiplier;
const crossBelow = constrainDomainPadding && baselinePaddedDomainLo < intercept && orderedDomain[0] >= intercept;
const crossAbove = constrainDomainPadding && baselinePaddedDomainHigh > 0 && orderedDomain[1] <= 0;
const paddedDomainLo = crossBelow
? intercept
: crossAbove
? orderedDomain[0] -
desiredPixelPadding /
screenspaceMarkerScaleCompressor([orderedDomain[0], intercept], [2 * desiredPixelPadding, 0], chartHeight)
.scaleMultiplier
: baselinePaddedDomainLo;
const paddedDomainHigh = crossBelow
? orderedDomain[1] +
desiredPixelPadding /
screenspaceMarkerScaleCompressor([intercept, orderedDomain[1]], [0, 2 * desiredPixelPadding], chartHeight)
.scaleMultiplier
: crossAbove
? intercept
: baselinePaddedDomainHigh;

return inverted ? [paddedDomainHigh, paddedDomainLo] : [paddedDomainLo, paddedDomainHigh];
}

/**
* All possible d3 scales
*/

interface ScaleData {
/** The Type of continuous scale */
type: ScaleContinuousType;
/** The data input domain */
domain: number[];
/** The data output range */
range: Range;
nice?: boolean;
}

type ScaleOptions = Required<LogScaleOptions, 'logBase'> & {
/**
* The desired bandwidth for a linear band scale.
* @defaultValue 0
*/
bandwidth: number;
/**
* The min interval computed on the XDomain. Not available for yDomains.
* @defaultValue 0
*/
minInterval: number;
/**
* A time zone identifier. Can be any IANA zone supported by he host environment,
* or a fixed-offset name of the form 'utc+3', or the strings 'local' or 'utc'.
* @defaultValue `utc`
*/
timeZone: string;
/**
* The number of bars in the cluster. Used to correctly compute scales when
* using padding between bars.
* @defaultValue 1
*/
totalBarsInCluster: number;
/**
* The proportion of the range that is reserved for blank space between bands
* A number between 0 and 1.
* @defaultValue 0
*/
barsPadding: number;
/**
* Pixel value to extend the domain. Applied __before__ nicing.
*
* Does not apply to time scales
* @defaultValue 0
*/
domainPixelPadding: number;
/**
* Constrains domain pixel padding to the zero baseline
* Does not apply to time scales
*/
constrainDomainPadding?: boolean;
/**
* The approximated number of ticks.
* @defaultValue 10
*/
desiredTickCount: number;
/**
* true if the scale was adjusted to fit one single value histogram
*/
isSingleValueHistogram: boolean;
/**
* Show only integer values
*/
integersOnly: boolean;
/**
* As log(0) = -Infinite, a log scale domain must be strictly-positive
* or strictly-negative; the domain must not include or cross zero value.
* We need to limit the domain scale to the right value on all possible cases.
*/
logMinLimit: number;
};

const defaultScaleOptions: ScaleOptions = {
bandwidth: 0,
minInterval: 0,
Expand All @@ -50,7 +180,10 @@ const defaultScaleOptions: ScaleOptions = {
logMinLimit: NaN, // NaN preserves the replaced `undefined` semantics
};

const isUnitRange = ([r1, r2]: Range) => r1 === 0 && r2 === 1;
/**
* d3 scales excluding time scale
*/
type D3ScaleNonTime<R = PrimitiveValue, O = number> = ScaleLinear<R, O> | ScaleLogarithmic<R, O> | ScalePower<R, O>;

/** @internal */
export class ScaleContinuous implements Scale<number> {
Expand Down Expand Up @@ -220,6 +353,10 @@ export class ScaleContinuous implements Scale<number> {
handleDomainPadding() {}
}

function isDegenerateDomain(domain: unknown[]): boolean {
return domain.every((v) => v === domain[0]);
}

function getTimeTicks(desiredTickCount: number, timeZone: string, domain: number[]) {
const startDomain = getMomentWithTz(domain[0], timeZone);
const endDomain = getMomentWithTz(domain[1], timeZone);
Expand All @@ -236,140 +373,3 @@ function getTimeTicks(desiredTickCount: number, timeZone: string, domain: number
return currentDateTime.subtract(currentOffset, 'minutes').valueOf();
});
}

function isDegenerateDomain(domain: unknown[]): boolean {
return domain.every((v) => v === domain[0]);
}

/** @internal */
export function limitLogScaleDomain([min, max]: ContinuousDomain, logMinLimit: number) {
// todo further simplify this
const absLimit = Math.abs(logMinLimit);
const fallback = absLimit || LOG_MIN_ABS_DOMAIN;
if (absLimit > 0 && min > 0 && min < absLimit) return max > absLimit ? [absLimit, max] : [absLimit, absLimit];
if (absLimit > 0 && max < 0 && max > -absLimit) return min < -absLimit ? [min, -absLimit] : [-absLimit, -absLimit];
if (min === 0) return max > 0 ? [fallback, max] : max < 0 ? [-fallback, max] : [fallback, fallback];
if (max === 0) return min > 0 ? [min, fallback] : min < 0 ? [min, -fallback] : [fallback, fallback];
if (min < 0 && max > 0) return Math.abs(max) >= Math.abs(min) ? [fallback, max] : [min, -fallback];
if (min > 0 && max < 0) return Math.abs(min) >= Math.abs(max) ? [min, fallback] : [-fallback, max];
return [min, max];
}

function getPixelPaddedDomain(
chartHeight: number,
domain: [number, number],
desiredPixelPadding: number,
constrainDomainPadding?: boolean,
intercept = 0,
) {
const inverted = domain[1] < domain[0];
const orderedDomain: [number, number] = inverted ? [domain[1], domain[0]] : domain;
const { scaleMultiplier } = screenspaceMarkerScaleCompressor(
orderedDomain,
[2 * desiredPixelPadding, 2 * desiredPixelPadding],
chartHeight,
);
const baselinePaddedDomainLo = orderedDomain[0] - desiredPixelPadding / scaleMultiplier;
const baselinePaddedDomainHigh = orderedDomain[1] + desiredPixelPadding / scaleMultiplier;
const crossBelow = constrainDomainPadding && baselinePaddedDomainLo < intercept && orderedDomain[0] >= intercept;
const crossAbove = constrainDomainPadding && baselinePaddedDomainHigh > 0 && orderedDomain[1] <= 0;
const paddedDomainLo = crossBelow
? intercept
: crossAbove
? orderedDomain[0] -
desiredPixelPadding /
screenspaceMarkerScaleCompressor([orderedDomain[0], intercept], [2 * desiredPixelPadding, 0], chartHeight)
.scaleMultiplier
: baselinePaddedDomainLo;
const paddedDomainHigh = crossBelow
? orderedDomain[1] +
desiredPixelPadding /
screenspaceMarkerScaleCompressor([intercept, orderedDomain[1]], [0, 2 * desiredPixelPadding], chartHeight)
.scaleMultiplier
: crossAbove
? intercept
: baselinePaddedDomainHigh;

return inverted ? [paddedDomainHigh, paddedDomainLo] : [paddedDomainLo, paddedDomainHigh];
}

/**
* d3 scales excluding time scale
*/
type D3ScaleNonTime<R = PrimitiveValue, O = number> = ScaleLinear<R, O> | ScaleLogarithmic<R, O> | ScalePower<R, O>;

/**
* All possible d3 scales
*/

interface ScaleData {
/** The Type of continuous scale */
type: ScaleContinuousType;
/** The data input domain */
domain: number[];
/** The data output range */
range: Range;
nice?: boolean;
}

type ScaleOptions = Required<LogScaleOptions, 'logBase'> & {
/**
* The desired bandwidth for a linear band scale.
* @defaultValue 0
*/
bandwidth: number;
/**
* The min interval computed on the XDomain. Not available for yDomains.
* @defaultValue 0
*/
minInterval: number;
/**
* A time zone identifier. Can be any IANA zone supported by he host environment,
* or a fixed-offset name of the form 'utc+3', or the strings 'local' or 'utc'.
* @defaultValue `utc`
*/
timeZone: string;
/**
* The number of bars in the cluster. Used to correctly compute scales when
* using padding between bars.
* @defaultValue 1
*/
totalBarsInCluster: number;
/**
* The proportion of the range that is reserved for blank space between bands
* A number between 0 and 1.
* @defaultValue 0
*/
barsPadding: number;
/**
* Pixel value to extend the domain. Applied __before__ nicing.
*
* Does not apply to time scales
* @defaultValue 0
*/
domainPixelPadding: number;
/**
* Constrains domain pixel padding to the zero baseline
* Does not apply to time scales
*/
constrainDomainPadding?: boolean;
/**
* The approximated number of ticks.
* @defaultValue 10
*/
desiredTickCount: number;
/**
* true if the scale was adjusted to fit one single value histogram
*/
isSingleValueHistogram: boolean;
/**
* Show only integer values
*/
integersOnly: boolean;
/**
* As log(0) = -Infinite, a log scale domain must be strictly-positive
* or strictly-negative; the domain must not include or cross zero value.
* We need to limit the domain scale to the right value on all possible cases.
*/
logMinLimit: number;
};

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