ttrss/lib/dojo/window.js.uncompressed.js

define("dojo/window", ["./_base/lang", "./_base/sniff", "./_base/window", "./dom", "./dom-geometry", "./dom-style"],
	function(lang, has, baseWindow, dom, geom, style) {

// module:
//		dojo/window
// summary:
//		TODOC

var window = lang.getObject("dojo.window", true);

/*=====
dojo.window = {
	// summary:
	//		TODO
};
window = dojo.window;
=====*/

window.getBox = function(){
	// summary:
	//		Returns the dimensions and scroll position of the viewable area of a browser window

	var
		scrollRoot = (baseWindow.doc.compatMode == 'BackCompat') ? baseWindow.body() : baseWindow.doc.documentElement,
		// get scroll position
		scroll = geom.docScroll(), // scrollRoot.scrollTop/Left should work
		w, h;

	if(has("touch")){ // if(scrollbars not supported)
		var uiWindow = baseWindow.doc.parentWindow || baseWindow.doc.defaultView;   // use UI window, not dojo.global window. baseWindow.doc.parentWindow probably not needed since it's not defined for webkit
		// on mobile, scrollRoot.clientHeight <= uiWindow.innerHeight <= scrollRoot.offsetHeight, return uiWindow.innerHeight
		w = uiWindow.innerWidth || scrollRoot.clientWidth; // || scrollRoot.clientXXX probably never evaluated
		h = uiWindow.innerHeight || scrollRoot.clientHeight;
	}else{
		// on desktops, scrollRoot.clientHeight <= scrollRoot.offsetHeight <= uiWindow.innerHeight, return scrollRoot.clientHeight
		// uiWindow.innerWidth/Height includes the scrollbar and cannot be used
		w = scrollRoot.clientWidth;
		h = scrollRoot.clientHeight;
	}
	return {
		l: scroll.x,
		t: scroll.y,
		w: w,
		h: h
	};
};

window.get = function(doc){
	// summary:
	// 		Get window object associated with document doc

	// In some IE versions (at least 6.0), document.parentWindow does not return a
	// reference to the real window object (maybe a copy), so we must fix it as well
	// We use IE specific execScript to attach the real window reference to
	// document._parentWindow for later use
	if(has("ie") && window !== document.parentWindow){
		/*
		In IE 6, only the variable "window" can be used to connect events (others
		may be only copies).
		*/
		doc.parentWindow.execScript("document._parentWindow = window;", "Javascript");
		//to prevent memory leak, unset it after use
		//another possibility is to add an onUnload handler which seems overkill to me (liucougar)
		var win = doc._parentWindow;
		doc._parentWindow = null;
		return win;	//	Window
	}

	return doc.parentWindow || doc.defaultView;	//	Window
};

window.scrollIntoView = function(/*DomNode*/ node, /*Object?*/ pos){
	// summary:
	//		Scroll the passed node into view, if it is not already.

	// don't rely on node.scrollIntoView working just because the function is there

	try{ // catch unexpected/unrecreatable errors (#7808) since we can recover using a semi-acceptable native method
		node = dom.byId(node);
		var doc = node.ownerDocument || baseWindow.doc,
			body = doc.body || baseWindow.body(),
			html = doc.documentElement || body.parentNode,
			isIE = has("ie"), isWK = has("webkit");
		// if an untested browser, then use the native method
		if((!(has("mozilla") || isIE || isWK || has("opera")) || node == body || node == html) && (typeof node.scrollIntoView != "undefined")){
			node.scrollIntoView(false); // short-circuit to native if possible
			return;
		}
		var backCompat = doc.compatMode == 'BackCompat',
			clientAreaRoot = (isIE >= 9 && node.ownerDocument.parentWindow.frameElement)
				? ((html.clientHeight > 0 && html.clientWidth > 0 && (body.clientHeight == 0 || body.clientWidth == 0 || body.clientHeight > html.clientHeight || body.clientWidth > html.clientWidth)) ? html : body)
				: (backCompat ? body : html),
			scrollRoot = isWK ? body : clientAreaRoot,
			rootWidth = clientAreaRoot.clientWidth,
			rootHeight = clientAreaRoot.clientHeight,
			rtl = !geom.isBodyLtr(),
			nodePos = pos || geom.position(node),
			el = node.parentNode,
			isFixed = function(el){
				return ((isIE <= 6 || (isIE && backCompat))? false : (style.get(el, 'position').toLowerCase() == "fixed"));
			};
		if(isFixed(node)){ return; } // nothing to do

		while(el){
			if(el == body){ el = scrollRoot; }
			var elPos = geom.position(el),
				fixedPos = isFixed(el);

			if(el == scrollRoot){
				elPos.w = rootWidth; elPos.h = rootHeight;
				if(scrollRoot == html && isIE && rtl){ elPos.x += scrollRoot.offsetWidth-elPos.w; } // IE workaround where scrollbar causes negative x
				if(elPos.x < 0 || !isIE){ elPos.x = 0; } // IE can have values > 0
				if(elPos.y < 0 || !isIE){ elPos.y = 0; }
			}else{
				var pb = geom.getPadBorderExtents(el);
				elPos.w -= pb.w; elPos.h -= pb.h; elPos.x += pb.l; elPos.y += pb.t;
				var clientSize = el.clientWidth,
					scrollBarSize = elPos.w - clientSize;
				if(clientSize > 0 && scrollBarSize > 0){
					elPos.w = clientSize;
					elPos.x += (rtl && (isIE || el.clientLeft > pb.l/*Chrome*/)) ? scrollBarSize : 0;
				}
				clientSize = el.clientHeight;
				scrollBarSize = elPos.h - clientSize;
				if(clientSize > 0 && scrollBarSize > 0){
					elPos.h = clientSize;
				}
			}
			if(fixedPos){ // bounded by viewport, not parents
				if(elPos.y < 0){
					elPos.h += elPos.y; elPos.y = 0;
				}
				if(elPos.x < 0){
					elPos.w += elPos.x; elPos.x = 0;
				}
				if(elPos.y + elPos.h > rootHeight){
					elPos.h = rootHeight - elPos.y;
				}
				if(elPos.x + elPos.w > rootWidth){
					elPos.w = rootWidth - elPos.x;
				}
			}
			// calculate overflow in all 4 directions
			var l = nodePos.x - elPos.x, // beyond left: < 0
				t = nodePos.y - Math.max(elPos.y, 0), // beyond top: < 0
				r = l + nodePos.w - elPos.w, // beyond right: > 0
				bot = t + nodePos.h - elPos.h; // beyond bottom: > 0
			if(r * l > 0){
				var s = Math[l < 0? "max" : "min"](l, r);
				if(rtl && ((isIE == 8 && !backCompat) || isIE >= 9)){ s = -s; }
				nodePos.x += el.scrollLeft;
				el.scrollLeft += s;
				nodePos.x -= el.scrollLeft;
			}
			if(bot * t > 0){
				nodePos.y += el.scrollTop;
				el.scrollTop += Math[t < 0? "max" : "min"](t, bot);
				nodePos.y -= el.scrollTop;
			}
			el = (el != scrollRoot) && !fixedPos && el.parentNode;
		}
	}catch(error){
		console.error('scrollIntoView: ' + error);
		node.scrollIntoView(false);
	}
};

return window;
});