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Code Issues Releases Activity

fix: Shopping List Label Text Color (#4302)

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Michael Genson 2024-10-01 10:47:51 -05:00 • committed by GitHub
parent f1d56cad9c
commit 3d1b08779b
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3 changed files with 52 additions and 41 deletions
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42
frontend/components/Domain/ShoppingList/MultiPurposeLabel.vue
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@ -8,8 +8,7 @@
<script lang="ts">
import { computed, defineComponent } from "@nuxtjs/composition-api";
// @ts-ignore missing color types
import Color from "@sphinxxxx/color-conversion";
import { getTextColor } from "~/composables/use-text-color";
import { MultiPurposeLabelSummary } from "~/lib/api/types/recipe";
@ -21,44 +20,7 @@ export default defineComponent({
},
},
setup(props) {
const textColor = computed(() => {
if (!props.label.color) {
return "black";
}
return pickTextColorBasedOnBgColorAdvanced(props.label.color, "white", "black");
});
/*
Function to pick the text color based on the background color.
Based on -> https://stackoverflow.com/questions/3942878/how-to-decide-font-color-in-white-or-black-depending-on-background-color
*/
const ACCESSIBILITY_THRESHOLD = 0.179;
function pickTextColorBasedOnBgColorAdvanced(bgColor: string, lightColor: string, darkColor: string) {
try {
const color = new Color(bgColor);
// if opacity is less than 0.3 always return dark color
if (color._rgba[3] < 0.3) {
return darkColor;
}
const uicolors = [color._rgba[0] / 255, color._rgba[1] / 255, color._rgba[2] / 255];
const c = uicolors.map((col) => {
if (col <= 0.03928) {
return col / 12.92;
}
return Math.pow((col + 0.055) / 1.055, 2.4);
});
const L = 0.2126 * c[0] + 0.7152 * c[1] + 0.0722 * c[2];
return L > ACCESSIBILITY_THRESHOLD ? darkColor : lightColor;
} catch (error) {
console.warn(error);
return "black";
}
}
const textColor = computed(() => getTextColor(props.label.color));
return {
textColor,