import {View} from "ui/core/view";

import * as utils from "utils/utils";

export module ios {

export function getActualHeight(view: UIView): number {

if (view.window && !view.hidden) {

return view.frame.size.height;

}

return 0;

}

export function getStatusBarHeight(): number {

var app = UIApplication.sharedApplication();

if (!app || app.statusBarHidden) {

return 0;

}

var statusFrame = app.statusBarFrame;

return Math.min(statusFrame.size.width, statusFrame.size.height);

}

export function _layoutRootView(rootView: View, parentBounds: CGRect) {

if (!rootView || !parentBounds) {

return;

}

let size = parentBounds.size;

let width = size.width;

let height = size.height;

var superview = (<UIView>rootView._nativeView).superview;

var superViewRotationRadians;

if (superview) {

superViewRotationRadians = atan2f(superview.transform.b, superview.transform.a);

}

if (utils.ios.MajorVersion < 8 && utils.ios.isLandscape() && !superViewRotationRadians) {

// in iOS 7 when in landscape we switch width with height because on device they don't change even when rotated.

width = size.height;

height = size.width;

}

var origin = parentBounds.origin;

var left = origin.x;

var top = origin.y;

var widthSpec = utils.layout.makeMeasureSpec(width, utils.layout.EXACTLY);

var heightSpec = utils.layout.makeMeasureSpec(height, utils.layout.EXACTLY);

rootView.measure(widthSpec, heightSpec);

rootView.layout(left, top, width, height);

}

}