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/**
* Selection save and restore module for Rangy.
* Saves and restores user selections using marker invisible elements in the DOM.
*
* Part of Rangy, a cross-browser JavaScript range and selection library
* https://github.com/timdown/rangy
*
* Depends on Rangy core.
*
* Copyright 2015, Tim Down
* Licensed under the MIT license.
* Version: 1.3.0
* Build date: 10 May 2015
*/
!function(e,n){"function"==typeof define&&define.amd?define(["./rangy-core"],e):"undefined"!=typeof module&&"object"==typeof exports?module.exports=e(require("rangy")):e(n.rangy)}(function(e){return e.createModule("SaveRestore",["WrappedRange"],function(e,n){function r(e,n){return(n||document).getElementById(e)}function t(e,n){var r,t="selectionBoundary_"+ +new Date+"_"+(""+Math.random()).slice(2),a=m.getDocument(e.startContainer),o=e.cloneRange();return o.collapse(n),r=a.createElement("span"),r.id=t,r.style.lineHeight="0",r.style.display="none",r.className="rangySelectionBoundary",r.appendChild(a.createTextNode(k)),o.insertNode(r),r}function a(e,t,a,o){var s=r(a,e);s?(t[o?"setStartBefore":"setEndBefore"](s),p(s)):n.warn("Marker element has been removed. Cannot restore selection.")}function o(e,n){return n.compareBoundaryPoints(e.START_TO_START,e)}function s(n,r){var a,o,s=e.DomRange.getRangeDocument(n),i=n.toString(),d=v(r);return n.collapsed?(o=t(n,!1),{document:s,markerId:o.id,collapsed:!0}):(o=t(n,!1),a=t(n,!0),{document:s,startMarkerId:a.id,endMarkerId:o.id,collapsed:!1,backward:d,toString:function(){return"original text: '"+i+"', new text: '"+n.toString()+"'"}})}function i(t,o){var s=t.document;"undefined"==typeof o&&(o=!0);var i=e.createRange(s);if(t.collapsed){var d=r(t.markerId,s);if(d){d.style.display="inline";var l=d.previousSibling;l&&3==l.nodeType?(p(d),i.collapseToPoint(l,l.length)):(i.collapseBefore(d),p(d))}else n.warn("Marker element has been removed. Cannot restore selection.")}else a(s,i,t.startMarkerId,!0),a(s,i,t.endMarkerId,!1);return o&&i.normalizeBoundaries(),i}function d(n,t){var a,i,d=[],l=v(t);n=n.slice(0),n.sort(o);for(var c=0,u=n.length;u>c;++c)d[c]=s(n[c],l);for(c=u-1;c>=0;--c)a=n[c],i=e.DomRange.getRangeDocument(a),a.collapsed?a.collapseAfter(r(d[c].markerId,i)):(a.setEndBefore(r(d[c].endMarkerId,i)),a.setStartAfter(r(d[c].startMarkerId,i)));return d}function l(r){if(!e.isSelectionValid(r))return n.warn("Cannot save selection. This usually happens when the selection is collapsed and the selection document has lost focus."),null;var t=e.getSelection(r),a=t.getAllRanges(),o=1==a.length&&t.isBackward(),s=d(a,o);return o?t.setSingleRange(a[0],o):t.setRanges(a),{win:r,rangeInfos:s,restored:!1}}function c(e){for(var n=[],r=e.length,t=r-1;t>=0;t--)n[t]=i(e[t],!0);return n}function u(n,r){if(!n.restored){var t=n.rangeInfos,a=e.getSelection(n.win),o=c(t),s=t.length;1==s&&r&&e.features.selectionHasExtend&&t[0].backward?(a.removeAllRanges(),a.addRange(o[0],!0)):a.setRanges(o),n.restored=!0}}function f(e,n){var t=r(n,e);t&&p(t)}function g(e){for(var n,r=e.rangeInfos,t=0,a=r.length;a>t;++t)n=r[t],n.collapsed?f(e.doc,n.markerId):(f(e.doc,n.startMarkerId),f(e.doc,n.endMarkerId))}var m=e.dom,p=m.removeNode,v=e.Selection.isDirectionBackward,k="";e.util.extend(e,{saveRange:s,restoreRange:i,saveRanges:d,restoreRanges:c,saveSelection:l,restoreSelection:u,removeMarkerElement:f,removeMarkers:g})}),e},this);
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