namespace pxt.shell {

export enum EditorLayoutType {

IDE,

Sandbox,

Widget,

Controller

}

let layoutType: EditorLayoutType;

let editorReadonly: boolean = false;

function init() {

if (layoutType !== undefined) return;

const sandbox = /sandbox=1|#sandbox|#sandboxproject/i.test(window.location.href)

// in iframe

|| pxt.BrowserUtils.isIFrame();

const nosandbox = /nosandbox=1/i.test(window.location.href);

const controller = /controller=1/i.test(window.location.href) && pxt.BrowserUtils.isIFrame();

const readonly = /readonly=1/i.test(window.location.href);

const layout = /editorlayout=(widget|sandbox|ide)/i.exec(window.location.href);

layoutType = EditorLayoutType.IDE;

if (nosandbox)

layoutType = EditorLayoutType.Widget;

else if (controller)

layoutType = EditorLayoutType.Controller;

else if (sandbox)

layoutType = EditorLayoutType.Sandbox;

if (controller && readonly) editorReadonly = true;

if (layout) {

switch (layout[1].toLowerCase()) {

case "widget": layoutType = EditorLayoutType.Widget; break;

case "sandbox": layoutType = EditorLayoutType.Sandbox; break;

case "ide": layoutType = EditorLayoutType.IDE; break;

}

}

pxt.debug(`shell: layout type ${EditorLayoutType[layoutType]}, readonly ${isReadOnly()}`);

}

export function layoutTypeClass(): string {

init();

return pxt.shell.EditorLayoutType[layoutType].toLowerCase();

}

export function isSandboxMode() {

init();

return layoutType == EditorLayoutType.Sandbox;

}

export function isReadOnly() {

return (isSandboxMode()

&& !/[?&]edit=1/i.test(window.location.href)) ||

(isControllerMode() && editorReadonly);

}

export function isControllerMode() {

init();

return layoutType == EditorLayoutType.Controller;

}

}