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products/sources/formale Sprachen/C/Firefox/devtools/client/shared/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 2 kB

Quelle theme.js Sprache: JAVA

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

const THEME_PREF = "devtools.theme";

/* eslint-disable no-unused-vars */

/**
* Returns the "auto" theme.
*/
const getAutoTheme = (exports.getAutoTheme = () => {
  return Services.appinfo.chromeColorSchemeIsDark ? "dark" : "light";
});

/**
* Returns the string value of the current theme,
* like "dark" or "light".
*/
const getTheme = (exports.getTheme = () => {
  const theme = getThemePrefValue();
  if (theme == "auto") {
    return getAutoTheme();
  }
  return theme;
});

/**
* Returns the value of the pref of the current theme,
* like "auto", "dark" or "light".
*/
const getThemePrefValue = (exports.getThemePrefValue = () => {
  return Services.prefs.getCharPref(THEME_PREF, "");
});

/**
* Returns the color of a CSS variable (--theme-toolbar-background, --theme-highlight-red),
* for the current toolbox theme, or null if the variable does not exist, or it's not a
* registered property, or doesn't have a <color> syntax.
*
* @param {String} variableName
* @param {Window} win: The window into which the variable should be defined.
* @returns {String|null}
*/
const getCssVariableColor = (exports.getCssVariableColor = (
  variableName,
  win
) => {
  const value = win
    .getComputedStyle(win.document.documentElement)
    .getPropertyValue(variableName);

  if (!value) {
    console.warn("Unknown", variableName, "CSS variable");
    return null;
  }

  return value;
});

/**
* Set the theme preference.
*/
const setTheme = (exports.setTheme = newTheme => {
  Services.prefs.setCharPref(THEME_PREF, newTheme);
});

/**
* Add an observer for theme changes.
*/
const addThemeObserver = (exports.addThemeObserver = observer => {
  Services.obs.addObserver(observer, "look-and-feel-changed");
  Services.prefs.addObserver(THEME_PREF, observer);
});

/**
* Remove an observer for theme changes.
*/
const removeThemeObserver = (exports.removeThemeObserver = observer => {
  Services.obs.removeObserver(observer, "look-and-feel-changed");
  Services.prefs.removeObserver(THEME_PREF, observer);
});
/* eslint-enable */

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