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94 lines
3.4 KiB
94 lines
3.4 KiB
/*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.ux.material.libmonet.scheme;
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import com.google.ux.material.libmonet.hct.Hct;
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import com.google.ux.material.libmonet.palettes.TonalPalette;
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import com.google.ux.material.libmonet.utils.MathUtils;
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/**
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* Provides important settings for creating colors dynamically, and 6 color palettes. Requires: 1. A
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* color. (source color) 2. A theme. (Variant) 3. Whether or not its dark mode. 4. Contrast level.
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* (-1 to 1, currently contrast ratio 3.0 and 7.0)
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*/
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public class DynamicScheme {
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public final int sourceColorArgb;
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public final Hct sourceColorHct;
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public final Variant variant;
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public final boolean isDark;
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public final double contrastLevel;
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public final TonalPalette primaryPalette;
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public final TonalPalette secondaryPalette;
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public final TonalPalette tertiaryPalette;
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public final TonalPalette neutralPalette;
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public final TonalPalette neutralVariantPalette;
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public final TonalPalette errorPalette;
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public DynamicScheme(
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Hct sourceColorHct,
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Variant variant,
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boolean isDark,
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double contrastLevel,
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TonalPalette primaryPalette,
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TonalPalette secondaryPalette,
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TonalPalette tertiaryPalette,
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TonalPalette neutralPalette,
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TonalPalette neutralVariantPalette) {
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this.sourceColorArgb = sourceColorHct.toInt();
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this.sourceColorHct = sourceColorHct;
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this.variant = variant;
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this.isDark = isDark;
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this.contrastLevel = contrastLevel;
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this.primaryPalette = primaryPalette;
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this.secondaryPalette = secondaryPalette;
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this.tertiaryPalette = tertiaryPalette;
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this.neutralPalette = neutralPalette;
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this.neutralVariantPalette = neutralVariantPalette;
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this.errorPalette = TonalPalette.fromHueAndChroma(25.0, 84.0);
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}
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/**
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* Given a set of hues and set of hue rotations, locate which hues the source color's hue is
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* between, apply the rotation at the same index as the first hue in the range, and return the
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* rotated hue.
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*
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* @param sourceColorHct The color whose hue should be rotated.
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* @param hues A set of hues.
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* @param rotations A set of hue rotations.
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* @return Color's hue with a rotation applied.
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*/
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public static double getRotatedHue(Hct sourceColorHct, double[] hues, double[] rotations) {
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final double sourceHue = sourceColorHct.getHue();
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if (rotations.length == 1) {
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return MathUtils.sanitizeDegreesDouble(sourceHue + rotations[0]);
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}
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final int size = hues.length;
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for (int i = 0; i <= (size - 2); i++) {
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final double thisHue = hues[i];
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final double nextHue = hues[i + 1];
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if (thisHue < sourceHue && sourceHue < nextHue) {
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return MathUtils.sanitizeDegreesDouble(sourceHue + rotations[i]);
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}
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}
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// If this statement executes, something is wrong, there should have been a rotation
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// found using the arrays.
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return sourceHue;
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}
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}
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