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9de72a3ac6
Differential Revision: https://phabricator.services.mozilla.com/D34196 --HG-- extra : moz-landing-system : lando
77 lines
2.8 KiB
JavaScript
77 lines
2.8 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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/*
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* Helper functions extract values from manifest members
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* and reports conformance violations.
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*/
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/* globals Components*/
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"use strict";
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const {XPCOMUtils} = ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyGlobalGetters(this, ["InspectorUtils"]);
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function ValueExtractor(aConsole, aBundle) {
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this.console = aConsole;
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this.domBundle = aBundle;
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}
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ValueExtractor.prototype = {
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// This function takes a 'spec' object and destructures
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// it to extract a value. If the value is of th wrong type, it
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// warns the developer and returns undefined.
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// expectType: is the type of a JS primitive (string, number, etc.)
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// object: is the object from which to extract the value.
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// objectName: string used to construct the developer warning.
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// property: the name of the property being extracted.
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// trim: boolean, if the value should be trimmed (used by string type).
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extractValue({expectedType, object, objectName, property, trim}) {
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const value = object[property];
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const isArray = Array.isArray(value);
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// We need to special-case "array", as it's not a JS primitive.
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const type = (isArray) ? "array" : typeof value;
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if (type !== expectedType) {
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if (type !== "undefined") {
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this.console.warn(this.domBundle.formatStringFromName("ManifestInvalidType",
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[objectName, property, expectedType]));
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}
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return undefined;
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}
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// Trim string and returned undefined if the empty string.
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const shouldTrim = expectedType === "string" && value && trim;
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if (shouldTrim) {
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return value.trim() || undefined;
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}
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return value;
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},
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extractColorValue(spec) {
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const value = this.extractValue(spec);
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let color;
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if (InspectorUtils.isValidCSSColor(value)) {
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const rgba = InspectorUtils.colorToRGBA(value);
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color = "#" + ((rgba.r << 16) |
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(rgba.g << 8) |
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rgba.b).toString(16);
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} else if (value) {
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this.console.warn(this.domBundle.formatStringFromName("ManifestInvalidCSSColor",
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[spec.property, value]));
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}
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return color;
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},
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extractLanguageValue(spec) {
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let langTag;
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const value = this.extractValue(spec);
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if (value !== undefined) {
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try {
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langTag = Intl.getCanonicalLocales(value)[0];
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} catch (err) {
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console.warn(this.domBundle.formatStringFromName("ManifestLangIsInvalid",
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[spec.property, value]));
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}
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}
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return langTag;
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},
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};
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var EXPORTED_SYMBOLS = ["ValueExtractor"]; // jshint ignore:line
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