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/* 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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
TranslationsParent: "resource://gre/actors/TranslationsParent.sys.mjs",
});
/**
* A class containing static functionality that is shared by both
* the FullPageTranslationsPanel and SelectTranslationsPanel classes.
*/
export class TranslationsPanelShared {
static #langListsInitState = new Map();
/**
* Defines lazy getters for accessing elements in the document based on provided entries.
*
* @param {Document} document - The document object.
* @param {object} lazyElements - An object where lazy getters will be defined.
* @param {object} entries - An object of key/value pairs for which to define lazy getters.
*/
static defineLazyElements(document, lazyElements, entries) {
for (const [name, discriminator] of Object.entries(entries)) {
let element;
Object.defineProperty(lazyElements, name, {
get: () => {
if (!element) {
if (discriminator[0] === ".") {
// Lookup by class
element = document.querySelector(discriminator);
} else {
// Lookup by id
element = document.getElementById(discriminator);
}
}
if (!element) {
throw new Error(`Could not find "${name}" at "#${discriminator}".`);
}
return element;
},
});
}
}
/**
* Retrieves the initialization state of language lists for the specified panel.
*
* @param {FullPageTranslationsPanel | SelectTranslationsPanel} panel
* - The panel for which to look up the state.
*/
static getLangListsInitState(panel) {
return TranslationsPanelShared.#langListsInitState.get(panel.id);
}
/**
* Builds the <menulist> of languages for both the "from" and "to". This can be
* called every time the popup is shown, as it will retry when there is an error
* (such as a network error) or be a noop if it's already initialized.
*
* @param {Document} document - The document object.
* @param {FullPageTranslationsPanel | SelectTranslationsPanel} panel
* - The panel for which to ensure language lists are built.
*/
static async ensureLangListsBuilt(document, panel, innerWindowId) {
const { id } = panel;
switch (
TranslationsPanelShared.#langListsInitState.get(`${id}-${innerWindowId}`)
) {
case "initialized":
// This has already been initialized.
return;
case "error":
case undefined:
// attempt to initialize
break;
default:
throw new Error(
`Unknown langList phase ${
TranslationsPanelShared.#langListsInitState
}`
);
}
/** @type {SupportedLanguages} */
const { languagePairs, fromLanguages, toLanguages } =
await lazy.TranslationsParent.getSupportedLanguages();
// Verify that we are in a proper state.
if (languagePairs.length === 0) {
throw new Error("No translation languages were retrieved.");
}
const fromPopups = panel.querySelectorAll(
".translations-panel-language-menupopup-from"
);
const toPopups = panel.querySelectorAll(
".translations-panel-language-menupopup-to"
);
for (const popup of fromPopups) {
for (const { langTag, displayName } of fromLanguages) {
const fromMenuItem = document.createXULElement("menuitem");
fromMenuItem.setAttribute("value", langTag);
fromMenuItem.setAttribute("label", displayName);
popup.appendChild(fromMenuItem);
}
}
for (const popup of toPopups) {
for (const { langTag, displayName } of toLanguages) {
const toMenuItem = document.createXULElement("menuitem");
toMenuItem.setAttribute("value", langTag);
toMenuItem.setAttribute("label", displayName);
popup.appendChild(toMenuItem);
}
}
TranslationsPanelShared.#langListsInitState.set(id, "initialized");
}
}
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