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/*
Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dojo.window"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojo.window"] = true;
dojo.provide("dojo.window");
dojo.window.getBox = function(){
// summary:
// Returns the dimensions and scroll position of the viewable area of a browser window
var scrollRoot = (dojo.doc.compatMode == 'BackCompat') ? dojo.body() : dojo.doc.documentElement;
// get scroll position
var scroll = dojo._docScroll(); // scrollRoot.scrollTop/Left should work
return { w: scrollRoot.clientWidth, h: scrollRoot.clientHeight, l: scroll.x, t: scroll.y };
};
dojo.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(dojo.isIE && 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
};
dojo.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 = dojo.byId(node);
var doc = node.ownerDocument || dojo.doc,
body = doc.body || dojo.body(),
html = doc.documentElement || body.parentNode,
isIE = dojo.isIE, isWK = dojo.isWebKit;
// if an untested browser, then use the native method
if((!(dojo.isMoz || isIE || isWK || dojo.isOpera) || node == body || node == html) && (typeof node.scrollIntoView != "undefined")){
node.scrollIntoView(false); // short-circuit to native if possible
return;
}
var backCompat = doc.compatMode == 'BackCompat',
clientAreaRoot = backCompat? body : html,
scrollRoot = isWK ? body : clientAreaRoot,
rootWidth = clientAreaRoot.clientWidth,
rootHeight = clientAreaRoot.clientHeight,
rtl = !dojo._isBodyLtr(),
nodePos = pos || dojo.position(node),
el = node.parentNode,
isFixed = function(el){
return ((isIE <= 6 || (isIE && backCompat))? false : (dojo.style(el, 'position').toLowerCase() == "fixed"));
};
if(isFixed(node)){ return; } // nothing to do
while(el){
if(el == body){ el = scrollRoot; }
var elPos = dojo.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 = dojo._getPadBorderExtents(el);
elPos.w -= pb.w; elPos.h -= pb.h; elPos.x += pb.l; elPos.y += pb.t;
}
if(el != scrollRoot){ // body, html sizes already have the scrollbar removed
var clientSize = el.clientWidth,
scrollBarSize = elPos.w - clientSize;
if(clientSize > 0 && scrollBarSize > 0){
elPos.w = clientSize;
if(isIE && rtl){ elPos.x += scrollBarSize; }
}
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);
nodePos.x += el.scrollLeft;
el.scrollLeft += (isIE >= 8 && !backCompat && rtl)? -s : 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);
}
};
}
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