smiles-drawer/src/ThemeManager.js

A SMILES drawer and parser. Generate molecular structure depictions in pure JavaScript.

export default class ThemeManager {
    constructor(colors, theme) {
        this.colors = colors;
        this.theme = this.colors[theme];
    }

    /**
     * Returns the hex code of a color associated with a key from the current theme.
     *
     * @param {String} key The color key in the theme (e.g. C, N, BACKGROUND, ...).
     * @returns {String} A color hex value.
     */
    getColor(key) {
        if (key) {
            key = key.toUpperCase();

            if (key in this.theme) {
                return this.theme[key];
            }
        }

        return this.theme['C'];
    }

    /**
     * Sets the theme to the specified string if it exists. If it does not, this
     * does nothing.
     *
     * @param {String} theme the name of the theme to switch to
     */
    setTheme(theme) {
        if (theme in this.colors) {
            this.theme = this.colors[theme];
        }

    // TODO: this probably should notify those who are watching this theme
    // manager that the theme has changed so that colors can be changed
    // on the fly
    }
}