@uifabric/styling
Version:
Styling helpers for Fluent UI React.
104 lines • 4.1 kB
JavaScript
import { __assign } from "tslib";
import { Customizations, getWindow } from '@uifabric/utilities';
import { loadTheme as legacyLoadTheme } from '@microsoft/load-themed-styles';
import { createTheme } from '@fluentui/theme/lib/createTheme';
export { createTheme } from '@fluentui/theme/lib/createTheme';
var _theme = createTheme({});
var _onThemeChangeCallbacks = [];
export var ThemeSettingName = 'theme';
export function initializeThemeInCustomizations() {
var _a;
var _b, _c, _d, _e;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
var win = getWindow();
if ((_c = (_b = win) === null || _b === void 0 ? void 0 : _b.FabricConfig) === null || _c === void 0 ? void 0 : _c.legacyTheme) {
// does everything the `else` clause does and more, such as invoke legacy theming
loadTheme(win.FabricConfig.legacyTheme);
}
else if (!Customizations.getSettings([ThemeSettingName]).theme) {
if ((_e = (_d = win) === null || _d === void 0 ? void 0 : _d.FabricConfig) === null || _e === void 0 ? void 0 : _e.theme) {
_theme = createTheme(win.FabricConfig.theme);
}
// Set the default theme.
Customizations.applySettings((_a = {}, _a[ThemeSettingName] = _theme, _a));
}
}
// Ensure theme is initialized when this package is referenced.
initializeThemeInCustomizations();
/**
* Gets the theme object
* @param depComments - Whether to include deprecated tags as comments for deprecated slots.
*/
export function getTheme(depComments) {
if (depComments === void 0) { depComments = false; }
if (depComments === true) {
_theme = createTheme({}, depComments);
}
return _theme;
}
/**
* Registers a callback that gets called whenever the theme changes.
* This should only be used when the component cannot automatically get theme changes through its state.
* This will not register duplicate callbacks.
*/
export function registerOnThemeChangeCallback(callback) {
if (_onThemeChangeCallbacks.indexOf(callback) === -1) {
_onThemeChangeCallbacks.push(callback);
}
}
/**
* See registerOnThemeChangeCallback().
* Removes previously registered callbacks.
*/
export function removeOnThemeChangeCallback(callback) {
var i = _onThemeChangeCallbacks.indexOf(callback);
if (i === -1) {
return;
}
_onThemeChangeCallbacks.splice(i, 1);
}
/**
* Applies the theme, while filling in missing slots.
* @param theme - Partial theme object.
* @param depComments - Whether to include deprecated tags as comments for deprecated slots.
*/
export function loadTheme(theme, depComments) {
var _a;
if (depComments === void 0) { depComments = false; }
_theme = createTheme(theme, depComments);
// Invoke the legacy method of theming the page as well.
legacyLoadTheme(__assign(__assign(__assign(__assign({}, _theme.palette), _theme.semanticColors), _theme.effects), _loadFonts(_theme)));
Customizations.applySettings((_a = {}, _a[ThemeSettingName] = _theme, _a));
_onThemeChangeCallbacks.forEach(function (callback) {
try {
callback(_theme);
}
catch (e) {
// don't let a bad callback break everything else
}
});
return _theme;
}
/**
* Loads font variables into a JSON object.
* @param theme - The theme object
*/
function _loadFonts(theme) {
var lines = {};
for (var _i = 0, _a = Object.keys(theme.fonts); _i < _a.length; _i++) {
var fontName = _a[_i];
var font = theme.fonts[fontName];
for (var _b = 0, _c = Object.keys(font); _b < _c.length; _b++) {
var propName = _c[_b];
var name_1 = fontName + propName.charAt(0).toUpperCase() + propName.slice(1);
var value = font[propName];
if (propName === 'fontSize' && typeof value === 'number') {
// if it's a number, convert it to px by default like our theming system does
value = value + 'px';
}
lines[name_1] = value;
}
}
return lines;
}
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