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WordPress/wp-admin/js/revisions.min.js
Adam Silverstein c7b217cee9 JavaScript: when starting Backbone history, stop if previously started. 
Prevent a potential error condition if Backbone history is started by a plugin or theme before core tries to start it. 

Props tfrommen.
Fixes #39612.

Built from https://develop.svn.wordpress.org/trunk@40076


git-svn-id: http://core.svn.wordpress.org/trunk@40013 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-02-17 22:00:42 +00:00

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window.wp=window.wp||{},function(a){var b;b=wp.revisions={model:{},view:{},controller:{}},b.settings=window._wpRevisionsSettings||{},b.debug=!1,b.log=function(){window.console&&b.debug&&window.console.log.apply(window.console,arguments)},a.fn.allOffsets=function(){var b=this.offset()||{top:0,left:0},c=a(window);return _.extend(b,{right:c.width()-b.left-this.outerWidth(),bottom:c.height()-b.top-this.outerHeight()})},a.fn.allPositions=function(){var a=this.position()||{top:0,left:0},b=this.parent();return _.extend(a,{right:b.outerWidth()-a.left-this.outerWidth(),bottom:b.outerHeight()-a.top-this.outerHeight()})},b.model.Slider=Backbone.Model.extend({defaults:{value:null,values:null,min:0,max:1,step:1,range:!1,compareTwoMode:!1},initialize:function(a){this.frame=a.frame,this.revisions=a.revisions,this.listenTo(this.frame,"update:revisions",this.receiveRevisions),this.listenTo(this.frame,"change:compareTwoMode",this.updateMode),this.on("change:from",this.handleLocalChanges),this.on("change:to",this.handleLocalChanges),this.on("change:compareTwoMode",this.updateSliderSettings),this.on("update:revisions",this.updateSliderSettings),this.on("change:hoveredRevision",this.hoverRevision),this.set({max:this.revisions.length-1,compareTwoMode:this.frame.get("compareTwoMode"),from:this.frame.get("from"),to:this.frame.get("to")}),this.updateSliderSettings()},getSliderValue:function(a,b){return isRtl?this.revisions.length-this.revisions.indexOf(this.get(a))-1:this.revisions.indexOf(this.get(b))},updateSliderSettings:function(){this.get("compareTwoMode")?this.set({values:[this.getSliderValue("to","from"),this.getSliderValue("from","to")],value:null,range:!0}):this.set({value:this.getSliderValue("to","to"),values:null,range:!1}),this.trigger("update:slider")},hoverRevision:function(a,b){this.trigger("hovered:revision",b)},updateMode:function(a,b){this.set({compareTwoMode:b})},handleLocalChanges:function(){this.frame.set({from:this.get("from"),to:this.get("to")})},receiveRevisions:function(a,b){this.get("from")===a&&this.get("to")===b||(this.set({from:a,to:b},{silent:!0}),this.trigger("update:revisions",a,b))}}),b.model.Tooltip=Backbone.Model.extend({defaults:{revision:null,offset:{},hovering:!1,scrubbing:!1},initialize:function(a){this.frame=a.frame,this.revisions=a.revisions,this.slider=a.slider,this.listenTo(this.slider,"hovered:revision",this.updateRevision),this.listenTo(this.slider,"change:hovering",this.setHovering),this.listenTo(this.slider,"change:scrubbing",this.setScrubbing)},updateRevision:function(a){this.set({revision:a})},setHovering:function(a,b){this.set({hovering:b})},setScrubbing:function(a,b){this.set({scrubbing:b})}}),b.model.Revision=Backbone.Model.extend({}),b.model.Revisions=Backbone.Collection.extend({model:b.model.Revision,initialize:function(){_.bindAll(this,"next","prev")},next:function(a){var b=this.indexOf(a);if(b!==-1&&b!==this.length-1)return this.at(b+1)},prev:function(a){var b=this.indexOf(a);if(b!==-1&&0!==b)return this.at(b-1)}}),b.model.Field=Backbone.Model.extend({}),b.model.Fields=Backbone.Collection.extend({model:b.model.Field}),b.model.Diff=Backbone.Model.extend({initialize:function(){var a=this.get("fields");this.unset("fields"),this.fields=new b.model.Fields(a)}}),b.model.Diffs=Backbone.Collection.extend({initialize:function(a,b){_.bindAll(this,"getClosestUnloaded"),this.loadAll=_.once(this._loadAll),this.revisions=b.revisions,this.postId=b.postId,this.requests={}},model:b.model.Diff,ensure:function(b,c){var d=this.get(b),e=this.requests[b],f=a.Deferred(),g={},h=b.split(":")[0],i=b.split(":")[1];return g[b]=!0,wp.revisions.log("ensure",b),this.trigger("ensure",g,h,i,f.promise()),d?f.resolveWith(c,[d]):(this.trigger("ensure:load",g,h,i,f.promise()),_.each(g,_.bind(function(a){this.requests[a]&&delete g[a],this.get(a)&&delete g[a]},this)),e||(g[b]=!0,e=this.load(_.keys(g))),e.done(_.bind(function(){f.resolveWith(c,[this.get(b)])},this)).fail(_.bind(function(){f.reject()}))),f.promise()},getClosestUnloaded:function(a,b){var c=this;return _.chain([0].concat(a)).initial().zip(a).sortBy(function(a){return Math.abs(b-a[1])}).map(function(a){return a.join(":")}).filter(function(a){return _.isUndefined(c.get(a))&&!c.requests[a]}).value()},_loadAll:function(b,c,d){var e=this,f=a.Deferred(),g=_.first(this.getClosestUnloaded(b,c),d);return _.size(g)>0?this.load(g).done(function(){e._loadAll(b,c,d).done(function(){f.resolve()})}).fail(function(){1===d?f.reject():e._loadAll(b,c,Math.ceil(d/2)).done(function(){f.resolve()})}):f.resolve(),f},load:function(a){return wp.revisions.log("load",a),this.fetch({data:{compare:a},remove:!1}).done(function(){wp.revisions.log("load:complete",a)})},sync:function(a,b,c){if("read"===a){c=c||{},c.context=this,c.data=_.extend(c.data||{},{action:"get-revision-diffs",post_id:this.postId});var d=wp.ajax.send(c),e=this.requests;return c.data.compare&&_.each(c.data.compare,function(a){e[a]=d}),d.always(function(){c.data.compare&&_.each(c.data.compare,function(a){delete e[a]})}),d}return Backbone.Model.prototype.sync.apply(this,arguments)}}),b.model.FrameState=Backbone.Model.extend({defaults:{loading:!1,error:!1,compareTwoMode:!1},initialize:function(a,c){var d=this.get("initialDiffState");_.bindAll(this,"receiveDiff"),this._debouncedEnsureDiff=_.debounce(this._ensureDiff,200),this.revisions=c.revisions,this.diffs=new b.model.Diffs([],{revisions:this.revisions,postId:this.get("postId")}),this.diffs.set(this.get("diffData")),this.listenTo(this,"change:from",this.changeRevisionHandler),this.listenTo(this,"change:to",this.changeRevisionHandler),this.listenTo(this,"change:compareTwoMode",this.changeMode),this.listenTo(this,"update:revisions",this.updatedRevisions),this.listenTo(this.diffs,"ensure:load",this.updateLoadingStatus),this.listenTo(this,"update:diff",this.updateLoadingStatus),this.set({to:this.revisions.get(d.to),from:this.revisions.get(d.from),compareTwoMode:d.compareTwoMode}),window.history&&window.history.pushState&&(this.router=new b.Router({model:this}),Backbone.History.started&&Backbone.history.stop(),Backbone.history.start({pushState:!0}))},updateLoadingStatus:function(){this.set("error",!1),this.set("loading",!this.diff())},changeMode:function(a,b){var c=this.revisions.indexOf(this.get("to"));b&&0===c&&this.set({from:this.revisions.at(c),to:this.revisions.at(c+1)}),b||0===c||this.set({from:this.revisions.at(c-1),to:this.revisions.at(c)})},updatedRevisions:function(a,b){this.get("compareTwoMode")||this.diffs.loadAll(this.revisions.pluck("id"),b.id,40)},diff:function(){return this.diffs.get(this._diffId)},updateDiff:function(b){var c,d,e,f;return b=b||{},c=this.get("from"),d=this.get("to"),e=(c?c.id:0)+":"+d.id,this._diffId===e?a.Deferred().reject().promise():(this._diffId=e,this.trigger("update:revisions",c,d),f=this.diffs.get(e),f?(this.receiveDiff(f),a.Deferred().resolve().promise()):b.immediate?this._ensureDiff():(this._debouncedEnsureDiff(),a.Deferred().reject().promise()))},changeRevisionHandler:function(){this.updateDiff()},receiveDiff:function(a){_.isUndefined(a)||_.isUndefined(a.id)?this.set({loading:!1,error:!0}):this._diffId===a.id&&this.trigger("update:diff",a)},_ensureDiff:function(){return this.diffs.ensure(this._diffId,this).always(this.receiveDiff)}}),b.view.Frame=wp.Backbone.View.extend({className:"revisions",template:wp.template("revisions-frame"),initialize:function(){this.listenTo(this.model,"update:diff",this.renderDiff),this.listenTo(this.model,"change:compareTwoMode",this.updateCompareTwoMode),this.listenTo(this.model,"change:loading",this.updateLoadingStatus),this.listenTo(this.model,"change:error",this.updateErrorStatus),this.views.set(".revisions-control-frame",new b.view.Controls({model:this.model}))},render:function(){return wp.Backbone.View.prototype.render.apply(this,arguments),a("html").css("overflow-y","scroll"),a("#wpbody-content .wrap").append(this.el),this.updateCompareTwoMode(),this.renderDiff(this.model.diff()),this.views.ready(),this},renderDiff:function(a){this.views.set(".revisions-diff-frame",new b.view.Diff({model:a}))},updateLoadingStatus:function(){this.$el.toggleClass("loading",this.model.get("loading"))},updateErrorStatus:function(){this.$el.toggleClass("diff-error",this.model.get("error"))},updateCompareTwoMode:function(){this.$el.toggleClass("comparing-two-revisions",this.model.get("compareTwoMode"))}}),b.view.Controls=wp.Backbone.View.extend({className:"revisions-controls",initialize:function(){_.bindAll(this,"setWidth"),this.views.add(new b.view.Buttons({model:this.model})),this.views.add(new b.view.Checkbox({model:this.model}));var a=new b.model.Slider({frame:this.model,revisions:this.model.revisions}),c=new b.model.Tooltip({frame:this.model,revisions:this.model.revisions,slider:a});this.views.add(new b.view.Tooltip({model:c})),this.views.add(new b.view.Tickmarks({model:c})),this.views.add(new b.view.Slider({model:a})),this.views.add(new b.view.Metabox({model:this.model}))},ready:function(){this.top=this.$el.offset().top,this.window=a(window),this.window.on("scroll.wp.revisions",{controls:this},function(a){var b=a.data.controls,c=b.$el.parent(),d=b.window.scrollTop(),e=b.views.parent;d>=b.top?(e.$el.hasClass("pinned")||(b.setWidth(),c.css("height",c.height()+"px"),b.window.on("resize.wp.revisions.pinning click.wp.revisions.pinning",{controls:b},function(a){a.data.controls.setWidth()})),e.$el.addClass("pinned")):e.$el.hasClass("pinned")?(b.window.off(".wp.revisions.pinning"),b.$el.css("width","auto"),e.$el.removeClass("pinned"),c.css("height","auto"),b.top=b.$el.offset().top):b.top=b.$el.offset().top})},setWidth:function(){this.$el.css("width",this.$el.parent().width()+"px")}}),b.view.Tickmarks=wp.Backbone.View.extend({className:"revisions-tickmarks",direction:isRtl?"right":"left",initialize:function(){this.listenTo(this.model,"change:revision",this.reportTickPosition)},reportTickPosition:function(a,b){var c,d,e,f,g=this.model.revisions.indexOf(b);d=this.$el.allOffsets(),e=this.$el.parent().allOffsets(),g===this.model.revisions.length-1?c={rightPlusWidth:d.left-e.left+1,leftPlusWidth:d.right-e.right+1}:(f=this.$("div:nth-of-type("+(g+1)+")"),c=f.allPositions(),_.extend(c,{left:c.left+d.left-e.left,right:c.right+d.right-e.right}),_.extend(c,{leftPlusWidth:c.left+f.outerWidth(),rightPlusWidth:c.right+f.outerWidth()})),this.model.set({offset:c})},ready:function(){var a,b;a=this.model.revisions.length-1,b=1/a,this.$el.css("width",50*this.model.revisions.length+"px"),_(a).times(function(a){this.$el.append('<div style="'+this.direction+": "+100*b*a+'%"></div>')},this)}}),b.view.Metabox=wp.Backbone.View.extend({className:"revisions-meta",initialize:function(){this.views.add(new b.view.MetaFrom({model:this.model,className:"diff-meta diff-meta-from"})),this.views.add(new b.view.MetaTo({model:this.model}))}}),b.view.Meta=wp.Backbone.View.extend({template:wp.template("revisions-meta"),events:{"click .restore-revision":"restoreRevision"},initialize:function(){this.listenTo(this.model,"update:revisions",this.render)},prepare:function(){return _.extend(this.model.toJSON()[this.type]||{},{type:this.type})},restoreRevision:function(){document.location=this.model.get("to").attributes.restoreUrl}}),b.view.MetaFrom=b.view.Meta.extend({className:"diff-meta diff-meta-from",type:"from"}),b.view.MetaTo=b.view.Meta.extend({className:"diff-meta diff-meta-to",type:"to"}),b.view.Checkbox=wp.Backbone.View.extend({className:"revisions-checkbox",template:wp.template("revisions-checkbox"),events:{"click .compare-two-revisions":"compareTwoToggle"},initialize:function(){this.listenTo(this.model,"change:compareTwoMode",this.updateCompareTwoMode)},ready:function(){this.model.revisions.length<3&&a(".revision-toggle-compare-mode").hide()},updateCompareTwoMode:function(){this.$(".compare-two-revisions").prop("checked",this.model.get("compareTwoMode"))},compareTwoToggle:function(){this.model.set({compareTwoMode:a(".compare-two-revisions").prop("checked")})}}),b.view.Tooltip=wp.Backbone.View.extend({className:"revisions-tooltip",template:wp.template("revisions-meta"),initialize:function(){this.listenTo(this.model,"change:offset",this.render),this.listenTo(this.model,"change:hovering",this.toggleVisibility),this.listenTo(this.model,"change:scrubbing",this.toggleVisibility)},prepare:function(){return _.isNull(this.model.get("revision"))?void 0:_.extend({type:"tooltip"},{attributes:this.model.get("revision").toJSON()})},render:function(){var a,b,c,d,e={},f=this.model.revisions.indexOf(this.model.get("revision"))+1;d=f/this.model.revisions.length>.5,isRtl?(b=d?"left":"right",c=d?"leftPlusWidth":b):(b=d?"right":"left",c=d?"rightPlusWidth":b),a="right"===b?"left":"right",wp.Backbone.View.prototype.render.apply(this,arguments),e[b]=this.model.get("offset")[c]+"px",e[a]="",this.$el.toggleClass("flipped",d).css(e)},visible:function(){return this.model.get("scrubbing")||this.model.get("hovering")},toggleVisibility:function(){this.visible()?this.$el.stop().show().fadeTo(100-100*this.el.style.opacity,1):this.$el.stop().fadeTo(300*this.el.style.opacity,0,function(){a(this).hide()})}}),b.view.Buttons=wp.Backbone.View.extend({className:"revisions-buttons",template:wp.template("revisions-buttons"),events:{"click .revisions-next .button":"nextRevision","click .revisions-previous .button":"previousRevision"},initialize:function(){this.listenTo(this.model,"update:revisions",this.disabledButtonCheck)},ready:function(){this.disabledButtonCheck()},gotoModel:function(a){var b={to:this.model.revisions.at(a)};a?b.from=this.model.revisions.at(a-1):this.model.unset("from",{silent:!0}),this.model.set(b)},nextRevision:function(){var a=this.model.revisions.indexOf(this.model.get("to"))+1;this.gotoModel(a)},previousRevision:function(){var a=this.model.revisions.indexOf(this.model.get("to"))-1;this.gotoModel(a)},disabledButtonCheck:function(){var b=this.model.revisions.length-1,c=0,d=a(".revisions-next .button"),e=a(".revisions-previous .button"),f=this.model.revisions.indexOf(this.model.get("to"));d.prop("disabled",b===f),e.prop("disabled",c===f)}}),b.view.Slider=wp.Backbone.View.extend({className:"wp-slider",direction:isRtl?"right":"left",events:{mousemove:"mouseMove"},initialize:function(){_.bindAll(this,"start","slide","stop","mouseMove","mouseEnter","mouseLeave"),this.listenTo(this.model,"update:slider",this.applySliderSettings)},ready:function(){this.$el.css("width",50*this.model.revisions.length+"px"),this.$el.slider(_.extend(this.model.toJSON(),{start:this.start,slide:this.slide,stop:this.stop})),this.$el.hoverIntent({over:this.mouseEnter,out:this.mouseLeave,timeout:800}),this.applySliderSettings()},mouseMove:function(b){var c=this.model.revisions.length-1,d=this.$el.allOffsets()[this.direction],e=this.$el.width(),f=e/c,g=(isRtl?a(window).width()-b.pageX:b.pageX)-d,h=Math.floor((g+f/2)/f);h<0?h=0:h>=this.model.revisions.length&&(h=this.model.revisions.length-1),this.model.set({hoveredRevision:this.model.revisions.at(h)})},mouseLeave:function(){this.model.set({hovering:!1})},mouseEnter:function(){this.model.set({hovering:!0})},applySliderSettings:function(){this.$el.slider(_.pick(this.model.toJSON(),"value","values","range"));var a=this.$("a.ui-slider-handle");this.model.get("compareTwoMode")?(a.first().toggleClass("to-handle",!!isRtl).toggleClass("from-handle",!isRtl),a.last().toggleClass("from-handle",!!isRtl).toggleClass("to-handle",!isRtl)):a.removeClass("from-handle to-handle")},start:function(b,c){this.model.set({scrubbing:!0}),a(window).on("mousemove.wp.revisions",{view:this},function(b){var d,e=b.data.view,f=e.$el.offset().left,g=f,h=f+e.$el.width(),i=h,j="0",k="100%",l=a(c.handle);e.model.get("compareTwoMode")&&(d=l.parent().find(".ui-slider-handle"),l.is(d.first())?(i=d.last().offset().left,k=i-g):(f=d.first().offset().left+d.first().width(),j=f-g)),b.pageX<f?l.css("left",j):b.pageX>i?l.css("left",k):l.css("left",b.pageX-g)})},getPosition:function(a){return isRtl?this.model.revisions.length-a-1:a},slide:function(a,b){var c,d;if(this.model.get("compareTwoMode")){if(b.values[1]===b.values[0])return!1;isRtl&&b.values.reverse(),c={from:this.model.revisions.at(this.getPosition(b.values[0])),to:this.model.revisions.at(this.getPosition(b.values[1]))}}else c={to:this.model.revisions.at(this.getPosition(b.value))},this.getPosition(b.value)>0?c.from=this.model.revisions.at(this.getPosition(b.value)-1):c.from=void 0;d=this.model.revisions.at(this.getPosition(b.value)),this.model.get("scrubbing")&&(c.hoveredRevision=d),this.model.set(c)},stop:function(){a(window).off("mousemove.wp.revisions"),this.model.updateSliderSettings(),this.model.set({scrubbing:!1})}}),b.view.Diff=wp.Backbone.View.extend({className:"revisions-diff",template:wp.template("revisions-diff"),prepare:function(){return _.extend({fields:this.model.fields.toJSON()},this.options)}}),b.Router=Backbone.Router.extend({initialize:function(a){this.model=a.model,this.listenTo(this.model,"update:diff",_.debounce(this.updateUrl,250)),this.listenTo(this.model,"change:compareTwoMode",this.updateUrl)},baseUrl:function(a){return this.model.get("baseUrl")+a},updateUrl:function(){var a=this.model.has("from")?this.model.get("from").id:0,b=this.model.get("to").id;this.model.get("compareTwoMode")?this.navigate(this.baseUrl("?from="+a+"&to="+b),{replace:!0}):this.navigate(this.baseUrl("?revision="+b),{replace:!0})},handleRoute:function(a,b){var c=_.isUndefined(b);c||(b=this.model.revisions.get(a),a=this.model.revisions.prev(b),b=b?b.id:0,a=a?a.id:0)}}),b.init=function(){var a;window.adminpage&&"revision-php"===window.adminpage&&(a=new b.model.FrameState({initialDiffState:{to:parseInt(b.settings.to,10),from:parseInt(b.settings.from,10),compareTwoMode:"1"===b.settings.compareTwoMode},diffData:b.settings.diffData,baseUrl:b.settings.baseUrl,postId:parseInt(b.settings.postId,10)},{revisions:new b.model.Revisions(b.settings.revisionData)}),b.view.frame=new b.view.Frame({model:a}).render())},a(b.init)}(jQuery);
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