//
//  iWeb - HeaderControls.js
//  Copyright (c) 2007-2008 Apple Inc. All rights reserved.
//

var HeaderControls=Class.create(Widget,{widgetIdentifier:"com-apple-iweb-widget-headercontrols",initialize:function($super,instanceID,widgetPath,sharedPath,sitePath,preferences,runningInApp)
{if(instanceID!=null)
{$super(instanceID,widgetPath,sharedPath,sitePath,preferences,runningInApp);NotificationCenter.addObserver(this,HeaderControls.prototype.p_prevPage,"PreviousPage",this.p_mediaGridID());NotificationCenter.addObserver(this,HeaderControls.prototype.p_nextPage,"NextPage",this.p_mediaGridID());NotificationCenter.addObserver(this,HeaderControls.prototype.p_setPage,"SetPage",this.p_mediaGridID());this.mRange=new IWPageRange(0,5);this.p_updateRange();}},onload:function()
{var defaults={showBackToIndex:true,showSubscribe:true,showSlideshow:true,mediaIndex:false,entriesPerPage:99,entryCount:0};this.initializeDefaultPreferences(defaults);this.setPage(0);this.updateFromPreferences();if(this.preferences&&this.preferences.postNotification)
{this.preferences.postNotification("BLWidgetIsSafeToDrawNotification",1);}},onunload:function()
{},startup:function()
{this.p_updateCanvasControls();this.p_updateBackToIndex();this.p_updatePaginationControls();this.p_updateSubscribe();this.p_updateSlideshow();if(this.p_mediaIndex())
{this.getElementById("media_index_only").show();}
else
{this.getElementById("album_only").show();}},changedPreferenceForKey:function(key)
{if(key=="entriesPerPage"||key=="entryCount"||key=="x-currentPage")
{this.p_updateRange();this.p_updatePaginationControls();}
else if(key=="showBackToIndex")
{this.p_updateBackToIndex();}
else if(key=="showSubscribe")
{this.p_updateSubscribe();}
else if(key=="showSlideshow")
{this.p_updateSlideshow();}
else if(key=="canvas controls")
{this.p_updateCanvasControls();}
else if(this.runningInApp)
{if(key=="x-nextPage")
{this.nextPage();}
else if(key=="x-previousPage")
{this.prevPage();}
else if(key=="x-setPage")
{this.setPage(this.p_setPagePreference());}}},updateFromPreferences:function()
{this.startup();},prevPage:function()
{NotificationCenter.postNotification(new IWNotification("PreviousPage",this.p_mediaGridID(),null));},nextPage:function()
{NotificationCenter.postNotification(new IWNotification("NextPage",this.p_mediaGridID(),null));},setPage:function(pageIndex)
{NotificationCenter.postNotification(new IWNotification("SetPage",this.p_mediaGridID(),{pageIndex:pageIndex}));},playSlideshow:function()
{if(this.mPlaySlideshowFunction)
{this.mPlaySlideshowFunction();}},setPlaySlideshowFunction:function(playSlideshow)
{this.mPlaySlideshowFunction=playSlideshow;},p_canNavigateToPrev:function()
{return(this.p_currentPage()>0);},p_prevPage:function(notification)
{if(this.p_canNavigateToPrev())
{this.setPage(this.p_currentPage()-1);}},p_canNavigateToNext:function()
{return(this.p_currentPage()<this.p_pageCount()-1);},p_nextPage:function(notification)
{if(this.p_canNavigateToNext())
{this.setPage(this.p_currentPage()+1);}},p_setPage:function(notification)
{var pageIndex=notification.userInfo().pageIndex;this.setPreferenceForKey(pageIndex,"x-currentPage");if(!this.runningInApp)
{var entriesPerPage=this.p_entriesPerPage();var location=pageIndex*entriesPerPage;var length=Math.min(this.p_entryCount()-location,entriesPerPage);var userInfo={"range":new IWRange(location,length)};NotificationCenter.postNotification(new IWNotification("RangeChanged",this.p_mediaGridID(),userInfo));}},p_showBackToIndex:function()
{var show=this.preferenceForKey("showBackToIndex");(function(){return show!==undefined}).assert();return show;},p_showSubscribe:function()
{var show=this.preferenceForKey("showSubscribe");(function(){return show!==undefined}).assert();return show;},p_showSlideshow:function()
{var show=this.preferenceForKey("showSlideshow");(function(){return show!==undefined}).assert();return show;},p_mediaGridID:function()
{var mediaGridID=null;if(this.preferences)
{mediaGridID=this.preferenceForKey("gridID");}
if(mediaGridID===undefined)
{mediaGridID=null;}
return mediaGridID;},p_setPagePreference:function()
{var setPagePreference=null;if(this.preferences)
{setPagePreference=this.preferenceForKey("x-setPage");}
if(setPagePreference===undefined)
{setPagePreference=null;}
return setPagePreference;},p_updatePaginationControls:function()
{var widgetDiv=this.div();var currentPage=this.p_currentPage();var controls="";if(this.p_isPaginated())
{var canvasControlURLs=this.preferenceForKey("canvas controls");if(this.p_canNavigateToPrev())
{var leftArrowSrc=canvasControlURLs['canvas_arrow-left'];controls+="<a href='javascript:#{WIDGET_ID}.prevPage()'>";controls+=imgMarkup(leftArrowSrc,'','','');controls+="</a> ";}
else
{var leftArrowSrc=canvasControlURLs['canvas_arrow-left-D'];controls+=imgMarkup(leftArrowSrc,'','','')+" ";}
for(var i=this.mRange.min();i<this.mRange.max();i++)
{if(i==currentPage)
{controls+="<span class='current_page'>"+(i+1)+"</span> ";}
else
{controls+="<a href='javascript:#{WIDGET_ID}.setPage("+i+")'>"+(i+1)+"</a> ";}}
if(this.p_canNavigateToNext())
{var rightArrowSrc=canvasControlURLs['canvas_arrow-right'];controls+="<a href='javascript:#{WIDGET_ID}.nextPage()'>";controls+=imgMarkup(rightArrowSrc,'','','');controls+="</a>";}
else
{var rightArrowSrc=canvasControlURLs['canvas_arrow-right-D'];controls+=imgMarkup(rightArrowSrc,'','','');}}
var template=new Template(controls);var myControls=template.evaluate({WIDGET_ID:this.instanceID});this.getElementById("pagination_controls").update(myControls);widgetDiv.select(".paginated_only").invoke(this.p_isPaginated()?'show':'hide');widgetDiv.select(".non_paginated_only").invoke(this.p_isPaginated()?'hide':'show');if(this.runningInApp)
{this.setPreferenceForKey(controls,"x-paginationSpanContents");}
else
{NotificationCenter.postNotification(new IWNotification("paginationSpanContents",this.p_mediaGridID(),{controls:controls}));}},p_setAnchorsUnderElementToHREF:function(element,href)
{$(element).select('a').map(function(anchor){anchor.href=href;});},p_updateCanvasControls:function()
{var canvasControlURLs=this.preferenceForKey("canvas controls");this.div().select('.canvas').each(function(img)
{var canvasControlName="canvas_"+img.classNames().toArray()[1];setImgSrc(img,canvasControlURLs[canvasControlName]);});},p_updateBackToIndex:function()
{var element=this.getElementById("back_to_index");this.p_showBackToIndex()?element.show():element.hide();if(!this.runningInApp)
{this.p_setAnchorsUnderElementToHREF(element,this.p_indexURL());}},p_updateSubscribe:function()
{this.div().select(".subscribe").invoke(this.p_showSubscribe()?'show':'hide');if(!this.runningInApp)
{var feedURL="javascript:"+this.instanceID+(this.p_mediaIndex()?".mediaIndexSubscribe()":".photocastSubscribe()")
var self=this;this.div().select(".subscribe").each(function(element)
{self.p_setAnchorsUnderElementToHREF(element,feedURL);});}},mediaIndexSubscribe:function()
{window.location=this.p_feedURL();},photocastSubscribe:function()
{photocastHelper(this.p_feedURL());},p_updateSlideshow:function()
{this.div().select(".play_slideshow").invoke(this.p_showSlideshow()?'show':'hide');},p_mediaIndex:function()
{var mediaIndex=null;if(this.preferences)
{mediaIndex=this.preferenceForKey("mediaIndex");}
if(mediaIndex===undefined)
{mediaIndex=false;}
return mediaIndex;},p_currentPage:function()
{var currentPage=0;if(this.preferences)
{currentPage=this.preferenceForKey("x-currentPage");}
if(!currentPage)
{currentPage=0;}
return currentPage;},p_entriesPerPage:function()
{var entriesPerPage=null;if(this.preferences)
{entriesPerPage=this.preferenceForKey("entriesPerPage");}
if(entriesPerPage==undefined)
{entriesPerPage=99;}
return entriesPerPage;},p_entryCount:function()
{var entryCount=null;if(this.preferences)
{entryCount=this.preferenceForKey("entryCount");}
if(entryCount==undefined)
{entryCount=0;}
return entryCount;},p_indexURL:function()
{return this.preferenceForKey("indexURL");},p_feedURL:function()
{return this.preferenceForKey("feedURL");},p_isPaginated:function()
{return(this.p_entryCount()>this.p_entriesPerPage());},p_pageCount:function()
{return Math.ceil(this.p_entryCount()/this.p_entriesPerPage());},p_updateRange:function()
{var pageCount=this.p_pageCount();var currentPage=this.p_currentPage();if(currentPage>=pageCount)
{currentPage=pageCount-1;this.setPreferenceForKey(currentPage,"x-currentPage");}
if(pageCount<=5||this.mRange.length()<3||this.mRange.max()>pageCount)
{this.mRange.setMax(Math.min(5,pageCount));}
if(currentPage<this.mRange.min())
{this.mRange.shift(currentPage-this.mRange.min());}
else if(currentPage>=this.mRange.max())
{this.mRange.shift(currentPage-this.mRange.max()+1);}}});


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