Handle touch events

1 files changed, 45 insertions, 26 deletions

diff --git a/server/static/js.go b/server/static/js.go
index 9f7c717..27bf361 100644
--- a/server/static/js.go
+++ b/server/static/js.go
@@ -1,10 +1,30 @@
 // Code generated by go generate; DO NOT EDIT.
-// 2017-11-27 21:07:53.215205872 -0800 PST m=+0.009392100
+// 2017-12-02 14:53:55.175825378 -0800 PST m=+0.009022020
 
 package static
 
 var Javascript = map[string]string{
-	"app": `(function(){'use strict';class KeyboardHandler{constructor(){this.queue=[];this.shortcuts={};}
+	"app": `(function(){'use strict';class DomHelper{static isVisible(element){return element.offsetParent!==null;}
+static openNewTab(url){let win=window.open(url,"_blank");win.focus();}
+static scrollPageTo(element){let windowScrollPosition=window.pageYOffset;let windowHeight=document.documentElement.clientHeight;let viewportPosition=windowScrollPosition+windowHeight;let itemBottomPosition=element.offsetTop+element.offsetHeight;if(viewportPosition-itemBottomPosition<0||viewportPosition-element.offsetTop>windowHeight){window.scrollTo(0,element.offsetTop-10);}}
+static getVisibleElements(selector){let elements=document.querySelectorAll(selector);let result=[];for(let i=0;i<elements.length;i++){if(this.isVisible(elements[i])){result.push(elements[i]);}}
+return result;}}
+class TouchHandler{constructor(){this.reset();}
+reset(){this.touch={start:{x:-1,y:-1},move:{x:-1,y:-1},element:null};}
+calculateDistance(){if(this.touch.start.x>=-1&&this.touch.move.x>=-1){let horizontalDistance=Math.abs(this.touch.move.x-this.touch.start.x);let verticalDistance=Math.abs(this.touch.move.y-this.touch.start.y);if(horizontalDistance>30&&verticalDistance<70){return this.touch.move.x-this.touch.start.x;}}
+return 0;}
+findElement(element){if(element.classList.contains("touch-item")){return element;}
+for(;element&&element!==document;element=element.parentNode){if(element.classList.contains("touch-item")){return element;}}
+return null;}
+onTouchStart(event){if(event.touches===undefined||event.touches.length!==1){return;}
+this.reset();this.touch.start.x=event.touches[0].clientX;this.touch.start.y=event.touches[0].clientY;this.touch.element=this.findElement(event.touches[0].target);}
+onTouchMove(event){if(event.touches===undefined||event.touches.length!==1||this.element===null){return;}
+this.touch.move.x=event.touches[0].clientX;this.touch.move.y=event.touches[0].clientY;let distance=this.calculateDistance();let absDistance=Math.abs(distance);if(absDistance>0){let opacity=1-(absDistance>75?0.9:absDistance/75*0.9);let tx=distance>75?75:(distance<-75?-75:distance);this.touch.element.style.opacity=opacity;this.touch.element.style.transform="translateX("+tx+"px)";}}
+onTouchEnd(event){if(event.touches===undefined){return;}
+if(this.touch.element!==null){let distance=Math.abs(this.calculateDistance());if(distance>75){EntryHandler.toggleEntryStatus(this.touch.element);this.touch.element.style.opacity=1;this.touch.element.style.transform="none";}}
+this.reset();}
+listen(){let elements=document.querySelectorAll(".touch-item");elements.forEach((element)=>{element.addEventListener("touchstart",(e)=>this.onTouchStart(e),false);element.addEventListener("touchmove",(e)=>this.onTouchMove(e),false);element.addEventListener("touchend",(e)=>this.onTouchEnd(e),false);element.addEventListener("touchcancel",()=>this.reset(),false);});}}
+class KeyboardHandler{constructor(){this.queue=[];this.shortcuts={};}
 on(combination,callback){this.shortcuts[combination]=callback;}
 listen(){document.onkeydown=(event)=>{if(this.isEventIgnored(event)){return;}
 let key=this.getKey(event);this.queue.push(key);for(let combination in this.shortcuts){let keys=combination.split(" ");if(keys.every((value,index)=>value===this.queue[index])){this.queue=[];this.shortcuts[combination]();return;}
@@ -15,40 +35,39 @@ getKey(event){const mapping={'Esc':'Escape','Up':'ArrowUp','Down':'ArrowDown','L
 return event.key;}}
 class FormHandler{static handleSubmitButtons(){let elements=document.querySelectorAll("form");elements.forEach(function(element){element.onsubmit=function(){let button=document.querySelector("button");if(button){button.innerHTML=button.dataset.labelLoading;button.disabled=true;}};});}}
 class MouseHandler{onClick(selector,callback){let elements=document.querySelectorAll(selector);elements.forEach((element)=>{element.onclick=(event)=>{event.preventDefault();callback(event);};});}}
-class App{run(){FormHandler.handleSubmitButtons();let keyboardHandler=new KeyboardHandler();keyboardHandler.on("g u",()=>this.goToPage("unread"));keyboardHandler.on("g h",()=>this.goToPage("history"));keyboardHandler.on("g f",()=>this.goToPage("feeds"));keyboardHandler.on("g c",()=>this.goToPage("categories"));keyboardHandler.on("g s",()=>this.goToPage("settings"));keyboardHandler.on("ArrowLeft",()=>this.goToPrevious());keyboardHandler.on("ArrowRight",()=>this.goToNext());keyboardHandler.on("j",()=>this.goToPrevious());keyboardHandler.on("p",()=>this.goToPrevious());keyboardHandler.on("k",()=>this.goToNext());keyboardHandler.on("n",()=>this.goToNext());keyboardHandler.on("h",()=>this.goToPage("previous"));keyboardHandler.on("l",()=>this.goToPage("next"));keyboardHandler.on("o",()=>this.openSelectedItem());keyboardHandler.on("v",()=>this.openOriginalLink());keyboardHandler.on("m",()=>this.toggleEntryStatus());keyboardHandler.on("A",()=>this.markPageAsRead());keyboardHandler.listen();let mouseHandler=new MouseHandler();mouseHandler.onClick("a[data-on-click=markPageAsRead]",()=>this.markPageAsRead());mouseHandler.onClick("a[data-confirm]",(event)=>this.confirm(event));if(document.documentElement.clientWidth<600){mouseHandler.onClick(".logo",()=>this.toggleMainMenu());mouseHandler.onClick(".header nav li",(event)=>this.clickMenuListItem(event));}}
-remove(url){let request=new Request(url,{method:"POST",cache:"no-cache",credentials:"include",headers:new Headers({"X-Csrf-Token":this.getCsrfToken()})});fetch(request).then(()=>{window.location.reload();});}
-confirm(event){let questionElement=document.createElement("span");let linkElement=event.target;let containerElement=linkElement.parentNode;linkElement.style.display="none";let yesElement=document.createElement("a");yesElement.href="#";yesElement.appendChild(document.createTextNode(linkElement.dataset.labelYes));yesElement.onclick=(event)=>{event.preventDefault();let loadingElement=document.createElement("span");loadingElement.className="loading";loadingElement.appendChild(document.createTextNode(linkElement.dataset.labelLoading));questionElement.remove();containerElement.appendChild(loadingElement);this.remove(linkElement.dataset.url);};let noElement=document.createElement("a");noElement.href="#";noElement.appendChild(document.createTextNode(linkElement.dataset.labelNo));noElement.onclick=(event)=>{event.preventDefault();linkElement.style.display="inline";questionElement.remove();};questionElement.className="confirm";questionElement.appendChild(document.createTextNode(linkElement.dataset.labelQuestion+" "));questionElement.appendChild(yesElement);questionElement.appendChild(document.createTextNode(", "));questionElement.appendChild(noElement);containerElement.appendChild(questionElement);}
-clickMenuListItem(event){let element=event.target;console.log(element);if(element.tagName==="A"){window.location.href=element.getAttribute("href");}else{window.location.href=element.querySelector("a").getAttribute("href");}}
-toggleMainMenu(){let menu=document.querySelector(".header nav ul");if(this.isVisible(menu)){menu.style.display="none";}else{menu.style.display="block";}}
-updateEntriesStatus(entryIDs,status){let url=document.body.dataset.entriesStatusUrl;let request=new Request(url,{method:"POST",cache:"no-cache",credentials:"include",body:JSON.stringify({entry_ids:entryIDs,status:status}),headers:new Headers({"Content-Type":"application/json","X-Csrf-Token":this.getCsrfToken()})});fetch(request);}
-markPageAsRead(){let items=this.getVisibleElements(".items .item");let entryIDs=[];items.forEach((element)=>{element.classList.add("item-status-read");entryIDs.push(parseInt(element.dataset.id,10));});if(entryIDs.length>0){this.updateEntriesStatus(entryIDs,"read");}
+class RequestBuilder{constructor(url){this.callback=null;this.url=url;this.options={method:"POST",cache:"no-cache",credentials:"include",body:null,headers:new Headers({"Content-Type":"application/json","X-Csrf-Token":this.getCsrfToken()})};}
+withBody(body){this.options.body=JSON.stringify(body);return this;}
+withCallback(callback){this.callback=callback;return this;}
+getCsrfToken(){let element=document.querySelector("meta[name=X-CSRF-Token]");if(element!==null){return element.getAttribute("value");}
+return "";}
+execute(){fetch(new Request(this.url,this.options)).then((response)=>{if(this.callback){this.callback(response);}});}}
+class EntryHandler{static updateEntriesStatus(entryIDs,status){let url=document.body.dataset.entriesStatusUrl;let request=new RequestBuilder(url);request.withBody({entry_ids:entryIDs,status:status});request.execute();}
+static toggleEntryStatus(element){let entryID=parseInt(element.dataset.id,10);let statuses={read:"unread",unread:"read"};for(let currentStatus in statuses){let newStatus=statuses[currentStatus];if(element.classList.contains("item-status-"+currentStatus)){element.classList.remove("item-status-"+currentStatus);element.classList.add("item-status-"+newStatus);this.updateEntriesStatus([entryID],newStatus);break;}}}}
+class ConfirmHandler{remove(url){let request=new RequestBuilder(url);request.withCallback(()=>window.location.reload());request.execute();}
+handle(event){let questionElement=document.createElement("span");let linkElement=event.target;let containerElement=linkElement.parentNode;linkElement.style.display="none";let yesElement=document.createElement("a");yesElement.href="#";yesElement.appendChild(document.createTextNode(linkElement.dataset.labelYes));yesElement.onclick=(event)=>{event.preventDefault();let loadingElement=document.createElement("span");loadingElement.className="loading";loadingElement.appendChild(document.createTextNode(linkElement.dataset.labelLoading));questionElement.remove();containerElement.appendChild(loadingElement);this.remove(linkElement.dataset.url);};let noElement=document.createElement("a");noElement.href="#";noElement.appendChild(document.createTextNode(linkElement.dataset.labelNo));noElement.onclick=(event)=>{event.preventDefault();linkElement.style.display="inline";questionElement.remove();};questionElement.className="confirm";questionElement.appendChild(document.createTextNode(linkElement.dataset.labelQuestion+" "));questionElement.appendChild(yesElement);questionElement.appendChild(document.createTextNode(", "));questionElement.appendChild(noElement);containerElement.appendChild(questionElement);}}
+class MenuHandler{clickMenuListItem(event){let element=event.target;if(element.tagName==="A"){window.location.href=element.getAttribute("href");}else{window.location.href=element.querySelector("a").getAttribute("href");}}
+toggleMainMenu(){let menu=document.querySelector(".header nav ul");if(DomHelper.isVisible(menu)){menu.style.display="none";}else{menu.style.display="block";}}}
+class NavHandler{markPageAsRead(){let items=DomHelper.getVisibleElements(".items .item");let entryIDs=[];items.forEach((element)=>{element.classList.add("item-status-read");entryIDs.push(parseInt(element.dataset.id,10));});if(entryIDs.length>0){EntryHandler.updateEntriesStatus(entryIDs,"read");}
 this.goToPage("next");}
-toggleEntryStatus(){let currentItem=document.querySelector(".current-item");if(currentItem!==null){let entryID=parseInt(currentItem.dataset.id,10);let statuses={read:"unread",unread:"read"};for(let currentStatus in statuses){let newStatus=statuses[currentStatus];if(currentItem.classList.contains("item-status-"+currentStatus)){this.goToNextListItem();currentItem.classList.remove("item-status-"+currentStatus);currentItem.classList.add("item-status-"+newStatus);this.updateEntriesStatus([entryID],newStatus);break;}}}}
-openOriginalLink(){let entryLink=document.querySelector(".entry h1 a");if(entryLink!==null){this.openNewTab(entryLink.getAttribute("href"));return;}
-let currentItemOriginalLink=document.querySelector(".current-item a[data-original-link]");if(currentItemOriginalLink!==null){this.openNewTab(currentItemOriginalLink.getAttribute("href"));}}
+toggleEntryStatus(){let currentItem=document.querySelector(".current-item");if(currentItem!==null){EntryHandler.toggleEntryStatus(currentItem);this.goToNextListItem();}}
+openOriginalLink(){let entryLink=document.querySelector(".entry h1 a");if(entryLink!==null){DomHelper.openNewTab(entryLink.getAttribute("href"));return;}
+let currentItemOriginalLink=document.querySelector(".current-item a[data-original-link]");if(currentItemOriginalLink!==null){DomHelper.openNewTab(currentItemOriginalLink.getAttribute("href"));}}
 openSelectedItem(){let currentItemLink=document.querySelector(".current-item .item-title a");if(currentItemLink!==null){window.location.href=currentItemLink.getAttribute("href");}}
 goToPage(page){let element=document.querySelector("a[data-page="+page+"]");if(element){document.location.href=element.href;}}
 goToPrevious(){if(this.isListView()){this.goToPreviousListItem();}else{this.goToPage("previous");}}
 goToNext(){if(this.isListView()){this.goToNextListItem();}else{this.goToPage("next");}}
-goToPreviousListItem(){let items=this.getVisibleElements(".items .item");if(items.length===0){return;}
+goToPreviousListItem(){let items=DomHelper.getVisibleElements(".items .item");if(items.length===0){return;}
 if(document.querySelector(".current-item")===null){items[0].classList.add("current-item");return;}
-for(let i=0;i<items.length;i++){if(items[i].classList.contains("current-item")){items[i].classList.remove("current-item");if(i-1>=0){items[i-1].classList.add("current-item");this.scrollPageTo(items[i-1]);}
+for(let i=0;i<items.length;i++){if(items[i].classList.contains("current-item")){items[i].classList.remove("current-item");if(i-1>=0){items[i-1].classList.add("current-item");DomHelper.scrollPageTo(items[i-1]);}
 break;}}}
-goToNextListItem(){let items=this.getVisibleElements(".items .item");if(items.length===0){return;}
+goToNextListItem(){let items=DomHelper.getVisibleElements(".items .item");if(items.length===0){return;}
 if(document.querySelector(".current-item")===null){items[0].classList.add("current-item");return;}
-for(let i=0;i<items.length;i++){if(items[i].classList.contains("current-item")){items[i].classList.remove("current-item");if(i+1<items.length){items[i+1].classList.add("current-item");this.scrollPageTo(items[i+1]);}
+for(let i=0;i<items.length;i++){if(items[i].classList.contains("current-item")){items[i].classList.remove("current-item");if(i+1<items.length){items[i+1].classList.add("current-item");DomHelper.scrollPageTo(items[i+1]);}
 break;}}}
-getVisibleElements(selector){let elements=document.querySelectorAll(selector);let result=[];for(let i=0;i<elements.length;i++){if(this.isVisible(elements[i])){result.push(elements[i]);}}
-return result;}
-isListView(){return document.querySelector(".items")!==null;}
-scrollPageTo(item){let windowScrollPosition=window.pageYOffset;let windowHeight=document.documentElement.clientHeight;let viewportPosition=windowScrollPosition+windowHeight;let itemBottomPosition=item.offsetTop+item.offsetHeight;if(viewportPosition-itemBottomPosition<0||viewportPosition-item.offsetTop>windowHeight){window.scrollTo(0,item.offsetTop-10);}}
-openNewTab(url){let win=window.open(url,"_blank");win.focus();}
-isVisible(element){return element.offsetParent!==null;}
-getCsrfToken(){let element=document.querySelector("meta[name=X-CSRF-Token]");if(element!==null){return element.getAttribute("value");}
-return "";}}
-document.addEventListener("DOMContentLoaded",function(){(new App()).run();});})();`,
+isListView(){return document.querySelector(".items")!==null;}}
+document.addEventListener("DOMContentLoaded",function(){FormHandler.handleSubmitButtons();let touchHandler=new TouchHandler();touchHandler.listen();let navHandler=new NavHandler();let keyboardHandler=new KeyboardHandler();keyboardHandler.on("g u",()=>navHandler.goToPage("unread"));keyboardHandler.on("g h",()=>navHandler.goToPage("history"));keyboardHandler.on("g f",()=>navHandler.goToPage("feeds"));keyboardHandler.on("g c",()=>navHandler.goToPage("categories"));keyboardHandler.on("g s",()=>navHandler.goToPage("settings"));keyboardHandler.on("ArrowLeft",()=>navHandler.goToPrevious());keyboardHandler.on("ArrowRight",()=>navHandler.goToNext());keyboardHandler.on("j",()=>navHandler.goToPrevious());keyboardHandler.on("p",()=>navHandler.goToPrevious());keyboardHandler.on("k",()=>navHandler.goToNext());keyboardHandler.on("n",()=>navHandler.goToNext());keyboardHandler.on("h",()=>navHandler.goToPage("previous"));keyboardHandler.on("l",()=>navHandler.goToPage("next"));keyboardHandler.on("o",()=>navHandler.openSelectedItem());keyboardHandler.on("v",()=>navHandler.openOriginalLink());keyboardHandler.on("m",()=>navHandler.toggleEntryStatus());keyboardHandler.on("A",()=>navHandler.markPageAsRead());keyboardHandler.listen();let mouseHandler=new MouseHandler();mouseHandler.onClick("a[data-on-click=markPageAsRead]",()=>navHandler.markPageAsRead());mouseHandler.onClick("a[data-confirm]",(event)=>{(new ConfirmHandler()).handle(event);});if(document.documentElement.clientWidth<600){let menuHandler=new MenuHandler();mouseHandler.onClick(".logo",()=>menuHandler.toggleMainMenu());mouseHandler.onClick(".header nav li",(event)=>menuHandler.clickMenuListItem(event));}});})();`,
 }
 
 var JavascriptChecksums = map[string]string{
-	"app": "cc5edd35e9e10e45cd84487bd11bed357f4e759917da1c83137f3c37006edd6f",
+	"app": "e1a955eaf7c0672da771ddbb87090bd7831197c46c5508349aa87a955f7814f6",
 }