Introduce dark mode and primary color picker

hassio/src/hassio-main.ts

@@ -94,7 +94,8 @@ class HassioMain extends ProvideHassLitMixin(HassRouterPage) {
     applyThemesOnElement(
       this.parentElement,
       this.hass.themes,
-      this.hass.selectedTheme || this.hass.themes.default_theme
+      this.hass.selectedTheme?.theme || this.hass.themes.default_theme,
+      this.hass.selectedTheme
     );
 
     this.style.setProperty(

package.json

@@ -35,6 +35,7 @@
     "@material/mwc-icon-button": "^0.17.2",
     "@material/mwc-list": "^0.17.2",
     "@material/mwc-menu": "^0.17.2",
+    "@material/mwc-radio": "^0.17.2",
     "@material/mwc-ripple": "^0.17.2",
     "@material/mwc-switch": "^0.17.2",
     "@material/mwc-tab": "^0.17.2",
@@ -100,7 +101,7 @@
     "lit-element": "^2.3.1",
     "lit-html": "^1.2.1",
     "lit-virtualizer": "^0.4.2",
-    "marked": "^0.6.1",
+    "marked": "^1.1.1",
     "mdn-polyfills": "^5.16.0",
     "memoize-one": "^5.0.2",
     "node-vibrant": "^3.1.5",
@@ -136,11 +137,12 @@
     "@rollup/plugin-replace": "^2.3.2",
     "@types/chai": "^4.1.7",
     "@types/chromecast-caf-receiver": "^3.0.12",
-    "@types/codemirror": "^0.0.78",
+    "@types/codemirror": "^0.0.97",
     "@types/hls.js": "^0.12.3",
     "@types/js-yaml": "^3.12.1",
     "@types/leaflet": "^1.4.3",
     "@types/leaflet-draw": "^1.0.1",
+    "@types/marked": "^1.1.0",
     "@types/memoize-one": "4.1.0",
     "@types/mocha": "^5.2.6",
     "@types/resize-observer-browser": "^0.1.3",

src/common/color/convert-color.ts

@@ -0,0 +1,113 @@
+const expand_hex = (hex: string): string => {
+  let result = "";
+  for (const val of hex) {
+    result += val + val;
+  }
+  return result;
+};
+
+const rgb_hex = (component: number): string => {
+  const hex = Math.round(Math.min(Math.max(component, 0), 255)).toString(16);
+  return hex.length === 1 ? `0${hex}` : hex;
+};
+
+// Conversion between HEX and RGB
+
+export const hex2rgb = (hex: string): [number, number, number] => {
+  hex = hex.replace("#", "");
+  if (hex.length === 3 || hex.length === 4) {
+    hex = expand_hex(hex);
+  }
+
+  return [
+    parseInt(hex.substring(0, 2), 16),
+    parseInt(hex.substring(2, 4), 16),
+    parseInt(hex.substring(4, 6), 16),
+  ];
+};
+
+export const rgb2hex = (rgb: [number, number, number]): string => {
+  return `#${rgb_hex(rgb[0])}${rgb_hex(rgb[1])}${rgb_hex(rgb[2])}`;
+};
+
+// Conversion between LAB, XYZ and RGB from https://github.com/gka/chroma.js
+// Copyright (c) 2011-2019, Gregor Aisch
+
+// Constants for XYZ and LAB conversion
+const Xn = 0.95047;
+const Yn = 1;
+const Zn = 1.08883;
+
+const t0 = 0.137931034; // 4 / 29
+const t1 = 0.206896552; // 6 / 29
+const t2 = 0.12841855; // 3 * t1 * t1
+const t3 = 0.008856452; // t1 * t1 * t1
+
+const rgb_xyz = (r: number) => {
+  r /= 255;
+  if (r <= 0.04045) {
+    return r / 12.92;
+  }
+  return ((r + 0.055) / 1.055) ** 2.4;
+};
+
+const xyz_lab = (t: number) => {
+  if (t > t3) {
+    return t ** (1 / 3);
+  }
+  return t / t2 + t0;
+};
+
+const xyz_rgb = (r: number) => {
+  return 255 * (r <= 0.00304 ? 12.92 * r : 1.055 * r ** (1 / 2.4) - 0.055);
+};
+
+const lab_xyz = (t: number) => {
+  return t > t1 ? t * t * t : t2 * (t - t0);
+};
+
+// Conversions between RGB and LAB
+
+const rgb2xyz = (rgb: [number, number, number]): [number, number, number] => {
+  let [r, g, b] = rgb;
+  r = rgb_xyz(r);
+  g = rgb_xyz(g);
+  b = rgb_xyz(b);
+  const x = xyz_lab((0.4124564 * r + 0.3575761 * g + 0.1804375 * b) / Xn);
+  const y = xyz_lab((0.2126729 * r + 0.7151522 * g + 0.072175 * b) / Yn);
+  const z = xyz_lab((0.0193339 * r + 0.119192 * g + 0.9503041 * b) / Zn);
+  return [x, y, z];
+};
+
+export const rgb2lab = (
+  rgb: [number, number, number]
+): [number, number, number] => {
+  const [x, y, z] = rgb2xyz(rgb);
+  const l = 116 * y - 16;
+  return [l < 0 ? 0 : l, 500 * (x - y), 200 * (y - z)];
+};
+
+export const lab2rgb = (
+  lab: [number, number, number]
+): [number, number, number] => {
+  const [l, a, b] = lab;
+
+  let y = (l + 16) / 116;
+  let x = isNaN(a) ? y : y + a / 500;
+  let z = isNaN(b) ? y : y - b / 200;
+
+  y = Yn * lab_xyz(y);
+  x = Xn * lab_xyz(x);
+  z = Zn * lab_xyz(z);
+
+  const r = xyz_rgb(3.2404542 * x - 1.5371385 * y - 0.4985314 * z); // D65 -> sRGB
+  const g = xyz_rgb(-0.969266 * x + 1.8760108 * y + 0.041556 * z);
+  const b_ = xyz_rgb(0.0556434 * x - 0.2040259 * y + 1.0572252 * z);
+
+  return [r, g, b_];
+};
+
+export const lab2hex = (lab: [number, number, number]): string => {
+  const rgb = lab2rgb(lab);
+  return rgb2hex(rgb);
+};

src/common/color/lab.ts

@@ -0,0 +1,16 @@
+// From https://github.com/gka/chroma.js
+// Copyright (c) 2011-2019, Gregor Aisch
+
+export const labDarken = (
+  lab: [number, number, number],
+  amount = 1
+): [number, number, number] => {
+  return [lab[0] - 18 * amount, lab[1], lab[2]];
+};
+
+export const labBrighten = (
+  lab: [number, number, number],
+  amount = 1
+): [number, number, number] => {
+  return labDarken(lab, -amount);
+};

src/common/color/rgb.ts

@@ -0,0 +1,24 @@
+const luminosity = (rgb: [number, number, number]): number => {
+  // http://www.w3.org/TR/WCAG20/#relativeluminancedef
+  const lum: [number, number, number] = [0, 0, 0];
+  for (let i = 0; i < rgb.length; i++) {
+    const chan = rgb[i] / 255;
+    lum[i] = chan <= 0.03928 ? chan / 12.92 : ((chan + 0.055) / 1.055) ** 2.4;
+  }
+
+  return 0.2126 * lum[0] + 0.7152 * lum[1] + 0.0722 * lum[2];
+};
+
+export const rgbContrast = (
+  color1: [number, number, number],
+  color2: [number, number, number]
+) => {
+  const lum1 = luminosity(color1);
+  const lum2 = luminosity(color2);
+
+  if (lum1 > lum2) {
+    return (lum1 + 0.05) / (lum2 + 0.05);
+  }
+
+  return (lum2 + 0.05) / (lum1 + 0.05);
+};

src/common/dom/apply_themes_on_element.ts

@@ -1,26 +1,20 @@
-import { derivedStyles } from "../../resources/styles";
+import { derivedStyles, darkStyles } from "../../resources/styles";
 import { HomeAssistant, Theme } from "../../types";
+import {
+  hex2rgb,
+  rgb2hex,
+  rgb2lab,
+  lab2rgb,
+  lab2hex,
+} from "../color/convert-color";
+import { rgbContrast } from "../color/rgb";
+import { labDarken, labBrighten } from "../color/lab";
 
 interface ProcessedTheme {
   keys: { [key: string]: "" };
   styles: { [key: string]: string };
 }
 
-const hexToRgb = (hex: string): string | null => {
-  const shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
-  const checkHex = hex.replace(shorthandRegex, (_m, r, g, b) => {
-    return r + r + g + g + b + b;
-  });
-
-  const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(checkHex);
-  return result
-    ? `${parseInt(result[1], 16)}, ${parseInt(result[2], 16)}, ${parseInt(
-        result[3],
-        16
-      )}`
-    : null;
-};
-
 let PROCESSED_THEMES: { [key: string]: ProcessedTheme } = {};
 
 /**
@@ -33,17 +27,56 @@ let PROCESSED_THEMES: { [key: string]: ProcessedTheme } = {};
 export const applyThemesOnElement = (
   element,
   themes: HomeAssistant["themes"],
-  selectedTheme?: string
+  selectedTheme?: string,
+  themeOptions?: Partial<HomeAssistant["selectedTheme"]>
 ) => {
-  const newTheme = selectedTheme
-    ? PROCESSED_THEMES[selectedTheme] || processTheme(selectedTheme, themes)
-    : undefined;
+  let cacheKey = selectedTheme;
+  let themeRules: Partial<Theme> = {};
 
-  if (!element._themes && !newTheme) {
+  if (selectedTheme === "default" && themeOptions) {
+    if (themeOptions.dark) {
+      cacheKey = `${cacheKey}__dark`;
+      themeRules = darkStyles;
+    }
+    if (themeOptions.primaryColor) {
+      cacheKey = `${cacheKey}__primary_${themeOptions.primaryColor}`;
+      const rgbPrimaryColor = hex2rgb(themeOptions.primaryColor);
+      const labPrimaryColor = rgb2lab(rgbPrimaryColor);
+      themeRules["primary-color"] = themeOptions.primaryColor;
+      const rgbLigthPrimaryColor = lab2rgb(labBrighten(labPrimaryColor));
+      themeRules["light-primary-color"] = rgb2hex(rgbLigthPrimaryColor);
+      themeRules["dark-primary-color"] = lab2hex(labDarken(labPrimaryColor));
+      themeRules["text-primary-color"] =
+        rgbContrast(rgbPrimaryColor, [33, 33, 33]) < 6 ? "#fff" : "#212121";
+      themeRules["text-light-primary-color"] =
+        rgbContrast(rgbLigthPrimaryColor, [33, 33, 33]) < 6
+          ? "#fff"
+          : "#212121";
+      themeRules["state-icon-color"] = themeRules["dark-primary-color"];
+    }
+    if (themeOptions.accentColor) {
+      cacheKey = `${cacheKey}__accent_${themeOptions.accentColor}`;
+      themeRules["accent-color"] = themeOptions.accentColor;
+      const rgbAccentColor = hex2rgb(themeOptions.accentColor);
+      themeRules["text-accent-color"] =
+        rgbContrast(rgbAccentColor, [33, 33, 33]) < 6 ? "#fff" : "#212121";
+    }
+  }
+
+  if (selectedTheme && themes.themes[selectedTheme]) {
+    themeRules = themes.themes[selectedTheme];
+  }
+
+  if (!element._themes && !Object.keys(themeRules).length) {
     // No styles to reset, and no styles to set
     return;
   }
 
+  const newTheme =
+    themeRules && cacheKey
+      ? PROCESSED_THEMES[cacheKey] || processTheme(cacheKey, themeRules)
+      : undefined;
+
   // Add previous set keys to reset them, and new theme
   const styles = { ...element._themes, ...newTheme?.styles };
   element._themes = newTheme?.keys;
@@ -58,42 +91,45 @@ export const applyThemesOnElement = (
 };
 
 const processTheme = (
-  themeName: string,
-  themes: HomeAssistant["themes"]
+  cacheKey: string,
+  theme: Partial<Theme>
 ): ProcessedTheme | undefined => {
-  if (!themes.themes[themeName]) {
+  if (!theme || !Object.keys(theme).length) {
     return undefined;
   }
-  const theme: Theme = {
+  const combinedTheme: Partial<Theme> = {
     ...derivedStyles,
-    ...themes.themes[themeName],
+    ...theme,
   };
   const styles = {};
   const keys = {};
-  for (const key of Object.keys(theme)) {
+  for (const key of Object.keys(combinedTheme)) {
     const prefixedKey = `--${key}`;
-    const value = theme[key];
+    const value = combinedTheme[key]!;
     styles[prefixedKey] = value;
     keys[prefixedKey] = "";
 
-    // Try to create a rgb value for this key if it is a hex color
+    // Try to create a rgb value for this key if it is not a var
     if (!value.startsWith("#")) {
-      // Not a hex color
+      // Can't convert non hex value
       continue;
     }
+
     const rgbKey = `rgb-${key}`;
-    if (theme[rgbKey] !== undefined) {
+    if (combinedTheme[rgbKey] !== undefined) {
       // Theme has it's own rgb value
       continue;
     }
-    const rgbValue = hexToRgb(value);
-    if (rgbValue !== null) {
+    try {
+      const rgbValue = hex2rgb(value).join(",");
       const prefixedRgbKey = `--${rgbKey}`;
       styles[prefixedRgbKey] = rgbValue;
       keys[prefixedRgbKey] = "";
+    } catch (e) {
+      continue;
     }
   }
-  PROCESSED_THEMES[themeName] = { styles, keys };
+  PROCESSED_THEMES[cacheKey] = { styles, keys };
   return { styles, keys };
 };