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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/. */
"use strict";
module.metadata = {
"stability": "experimental"
};
const { Ci } = require("chrome");
const SHEET_TYPE = {
"agent": "AGENT_SHEET",
"user": "USER_SHEET",
"author": "AUTHOR_SHEET"
};
function getDOMWindowUtils(window) {
return window.QueryInterface(Ci.nsIInterfaceRequestor).
getInterface(Ci.nsIDOMWindowUtils);
};
/**
* Synchronously loads a style sheet from `uri` and adds it to the list of
* additional style sheets of the document.
* The sheets added takes effect immediately, and only on the document of the
* `window` given.
*/
function loadSheet(window, url, type) {
if (!(type && type in SHEET_TYPE))
type = "author";
type = SHEET_TYPE[type];
if (url instanceof Ci.nsIURI)
url = url.spec;
let winUtils = getDOMWindowUtils(window);
try {
winUtils.loadSheetUsingURIString(url, winUtils[type]);
}
catch (e) {};
};
exports.loadSheet = loadSheet;
/**
* Remove the document style sheet at `sheetURI` from the list of additional
* style sheets of the document. The removal takes effect immediately.
*/
function removeSheet(window, url, type) {
if (!(type && type in SHEET_TYPE))
type = "author";
type = SHEET_TYPE[type];
if (url instanceof Ci.nsIURI)
url = url.spec;
let winUtils = getDOMWindowUtils(window);
try {
winUtils.removeSheetUsingURIString(url, winUtils[type]);
}
catch (e) {};
};
exports.removeSheet = removeSheet;
/**
* Returns `true` if the `type` given is valid, otherwise `false`.
* The values currently accepted are: "agent", "user" and "author".
*/
function isTypeValid(type) {
return type in SHEET_TYPE;
}
exports.isTypeValid = isTypeValid;
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