GZ/nwyj/WebContent/admin/scripts/dojo/dijit/_base/place.js

if (!dojo._hasResource["dijit._base.place"]) { // _hasResource checks added by
												// build. Do not use
												// _hasResource directly in your
												// code.
	dojo._hasResource["dijit._base.place"] = true;
	dojo.provide("dijit._base.place");

	// ported from dojo.html.util

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

		var _window = dojo.global;
		var _document = dojo.doc;

		// get viewport size
		var w = 0, h = 0;
		if (dojo.isMozilla) {
			// mozilla
			// _window.innerHeight includes the height taken by the scroll bar
			// clientHeight is ideal but has DTD issues:
			// #4539: FF reverses the roles of body.clientHeight/Width and
			// documentElement.clientHeight/Width based on the DTD!
			// check DTD to see whether body or documentElement returns the
			// viewport dimensions using this algorithm:
			var minw, minh, maxw, maxh;
			if (_document.body.clientWidth > _document.documentElement.clientWidth) {
				minw = _document.documentElement.clientWidth;
				maxw = _document.body.clientWidth;
			} else {
				maxw = _document.documentElement.clientWidth;
				minw = _document.body.clientWidth;
			}
			if (_document.body.clientHeight > _document.documentElement.clientHeight) {
				minh = _document.documentElement.clientHeight;
				maxh = _document.body.clientHeight;
			} else {
				maxh = _document.documentElement.clientHeight;
				minh = _document.body.clientHeight;
			}
			w = (maxw > _window.innerWidth) ? minw : maxw;
			h = (maxh > _window.innerHeight) ? minh : maxh;
		} else if (!dojo.isOpera && _window.innerWidth) {
			// in opera9, dojo.body().clientWidth should be used, instead
			// of window.innerWidth/document.documentElement.clientWidth
			// so we have to check whether it is opera
			w = _window.innerWidth;
			h = _window.innerHeight;
		} else if (dojo.isIE && _document.documentElement
				&& _document.documentElement.clientHeight) {
			w = _document.documentElement.clientWidth;
			h = _document.documentElement.clientHeight;
		} else if (dojo.body().clientWidth) {
			// IE5, Opera
			w = dojo.body().clientWidth;
			h = dojo.body().clientHeight;
		}

		// get scroll position
		var scroll = dojo._docScroll();

		return {
			w : w,
			h : h,
			l : scroll.x,
			t : scroll.y
		}; // object
	};

	dijit.placeOnScreen = function(
			/* DomNode */node,
			/* Object */pos,
			/* Object */corners,
			/* boolean? */tryOnly) {
		// summary:
		// Keeps 'node' in the visible area of the screen while trying to
		// place closest to pos.x, pos.y. The input coordinates are
		// expected to be the desired document position.
		//
		// Set which corner(s) you want to bind to, such as
		//		
		// placeOnScreen(node, {x: 10, y: 20}, ["TR", "BL"])
		//		
		// The desired x/y will be treated as the topleft(TL)/topright(TR) or
		// BottomLeft(BL)/BottomRight(BR) corner of the node. Each corner is
		// tested
		// and if a perfect match is found, it will be used. Otherwise, it goes
		// through
		// all of the specified corners, and choose the most appropriate one.
		//		
		// NOTE: node is assumed to be absolutely or relatively positioned.

		var choices = dojo.map(corners, function(corner) {
					return {
						corner : corner,
						pos : pos
					};
				});

		return dijit._place(node, choices);
	}

	dijit._place = function(/* DomNode */node, /* Array */choices, /* Function */
			layoutNode) {
		// summary:
		// Given a list of spots to put node, put it at the first spot where it
		// fits,
		// of if it doesn't fit anywhere then the place with the least overflow
		// choices: Array
		// Array of elements like: {corner: 'TL', pos: {x: 10, y: 20} }
		// Above example says to put the top-left corner of the node at (10,20)
		// layoutNode: Function(node, orient)
		// for things like tooltip, they are displayed differently (and have
		// different dimensions)
		// based on their orientation relative to the parent. This adjusts the
		// popup based on orientation.

		// get {x: 10, y: 10, w: 100, h:100} type obj representing position of
		// viewport over document
		var view = dijit.getViewport();

		// This won't work if the node is inside a <div style="position:
		// relative">,
		// so reattach it to document.body. (Otherwise, the positioning will be
		// wrong
		// and also it might get cutoff)
		if (!node.parentNode
				|| String(node.parentNode.tagName).toLowerCase() != "body") {
			dojo.body().appendChild(node);
		}

		var best = null;
		for (var i = 0; i < choices.length; i++) {
			var corner = choices[i].corner;
			var pos = choices[i].pos;

			// configure node to be displayed in given position relative to
			// button
			// (need to do this in order to get an accurate size for the node,
			// because
			// a tooltips size changes based on position, due to triangle)
			if (layoutNode) {
				layoutNode(corner);
			}

			// get node's size
			var oldDisplay = node.style.display;
			var oldVis = node.style.visibility;
			node.style.visibility = "hidden";
			node.style.display = "";
			var mb = dojo.marginBox(node);
			node.style.display = oldDisplay;
			node.style.visibility = oldVis;

			// coordinates and size of node with specified corner placed at pos,
			// and clipped by viewport
			var startX = (corner.charAt(1) == 'L' ? pos.x : Math.max(view.l,
					pos.x - mb.w)), startY = (corner.charAt(0) == 'T'
					? pos.y
					: Math.max(view.t, pos.y - mb.h)), endX = (corner.charAt(1) == 'L'
					? Math.min(view.l + view.w, startX + mb.w)
					: pos.x), endY = (corner.charAt(0) == 'T' ? Math.min(view.t
							+ view.h, startY + mb.h) : pos.y), width = endX
					- startX, height = endY - startY, overflow = (mb.w - width)
					+ (mb.h - height);

			if (best == null || overflow < best.overflow) {
				best = {
					corner : corner,
					aroundCorner : choices[i].aroundCorner,
					x : startX,
					y : startY,
					w : width,
					h : height,
					overflow : overflow
				};
			}
			if (overflow == 0) {
				break;
			}
		}

		node.style.left = best.x + "px";
		node.style.top = best.y + "px";
		return best;
	}

	dijit.placeOnScreenAroundElement = function(
			/* DomNode */node,
			/* DomNode */aroundNode,
			/* Object */aroundCorners,
			/* Function */layoutNode) {

		// summary
		// Like placeOnScreen, except it accepts aroundNode instead of x,y
		// and attempts to place node around it. Uses margin box dimensions.
		//
		// aroundCorners
		// specify Which corner of aroundNode should be
		// used to place the node => which corner(s) of node to use (see the
		// corners parameter in dijit.placeOnScreen)
		// e.g. {'TL': 'BL', 'BL': 'TL'}
		//
		// layoutNode: Function(node, orient)
		// for things like tooltip, they are displayed differently (and have
		// different dimensions)
		// based on their orientation relative to the parent. This adjusts the
		// popup based on orientation.

		// get coordinates of aroundNode
		aroundNode = dojo.byId(aroundNode);
		var oldDisplay = aroundNode.style.display;
		aroundNode.style.display = "";
		// #3172: use the slightly tighter border box instead of marginBox
		var aroundNodeW = aroundNode.offsetWidth; // mb.w;
		var aroundNodeH = aroundNode.offsetHeight; // mb.h;
		var aroundNodePos = dojo.coords(aroundNode, true);
		aroundNode.style.display = oldDisplay;

		// Generate list of possible positions for node
		var choices = [];
		for (var nodeCorner in aroundCorners) {
			choices.push({
						aroundCorner : nodeCorner,
						corner : aroundCorners[nodeCorner],
						pos : {
							x : aroundNodePos.x
									+ (nodeCorner.charAt(1) == 'L'
											? 0
											: aroundNodeW),
							y : aroundNodePos.y
									+ (nodeCorner.charAt(0) == 'T'
											? 0
											: aroundNodeH)
						}
					});
		}

		return dijit._place(node, choices, layoutNode);
	}

}