diff options
Diffstat (limited to 'ui/static')
-rw-r--r-- | ui/static/js.go | 8 | ||||
-rw-r--r-- | ui/static/js/dom_helper.js | 19 | ||||
-rw-r--r-- | ui/static/js/touch_handler.js | 9 |
3 files changed, 29 insertions, 7 deletions
diff --git a/ui/static/js.go b/ui/static/js.go index 7e59986..a6b7b1c 100644 --- a/ui/static/js.go +++ b/ui/static/js.go @@ -9,7 +9,9 @@ static scrollPageTo(element){let windowScrollPosition=window.pageYOffset;let win 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;} static findParent(element,selector){for(;element&&element!==document;element=element.parentNode){if(element.classList.contains(selector)){return element;}} -return null;}} +return null;} +static hasPassiveEventListenerOption(){var passiveSupported=false;try{var options=Object.defineProperty({},"passive",{get:function(){passiveSupported=true;}});window.addEventListener("test",options,options);window.removeEventListener("test",options,options);}catch(err){passiveSupported=false;} +return passiveSupported;}} 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;}} @@ -24,7 +26,7 @@ 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);});}} +listen(){let elements=document.querySelectorAll(".touch-item");let hasPassiveOption=DomHelper.hasPassiveEventListenerOption();elements.forEach((element)=>{element.addEventListener("touchstart",(e)=>this.onTouchStart(e),hasPassiveOption?{passive:true}:false);element.addEventListener("touchmove",(e)=>this.onTouchMove(e),hasPassiveOption?{passive:true}:false);element.addEventListener("touchend",(e)=>this.onTouchEnd(e),hasPassiveOption?{passive:true}:false);element.addEventListener("touchcancel",()=>this.reset(),hasPassiveOption?{passive:true}:false);});}} class KeyboardHandler{constructor(){this.queue=[];this.shortcuts={};} on(combination,callback){this.shortcuts[combination]=callback;} listen(){document.onkeydown=(event)=>{if(this.isEventIgnored(event)){return;} @@ -93,5 +95,5 @@ document.addEventListener("DOMContentLoaded",function(){FormHandler.handleSubmit } var JavascriptChecksums = map[string]string{ - "app": "c090bbc7f503aa032b4cfe68b58bc4754133aaed4f77ff768ac63f41528f55c3", + "app": "ef0457f301b924c25a20fa00e65bfda5437f41bc9ad0a0762b62b9c64b6d0ac5", } diff --git a/ui/static/js/dom_helper.js b/ui/static/js/dom_helper.js index 8a0644b..903e9a9 100644 --- a/ui/static/js/dom_helper.js +++ b/ui/static/js/dom_helper.js @@ -43,4 +43,23 @@ class DomHelper { return null; } + + static hasPassiveEventListenerOption() { + var passiveSupported = false; + + try { + var options = Object.defineProperty({}, "passive", { + get: function() { + passiveSupported = true; + } + }); + + window.addEventListener("test", options, options); + window.removeEventListener("test", options, options); + } catch(err) { + passiveSupported = false; + } + + return passiveSupported; + } } diff --git a/ui/static/js/touch_handler.js b/ui/static/js/touch_handler.js index 69488a5..a6c5c81 100644 --- a/ui/static/js/touch_handler.js +++ b/ui/static/js/touch_handler.js @@ -83,12 +83,13 @@ class TouchHandler { listen() { let elements = document.querySelectorAll(".touch-item"); + let hasPassiveOption = DomHelper.hasPassiveEventListenerOption(); 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); + element.addEventListener("touchstart", (e) => this.onTouchStart(e), hasPassiveOption ? { passive: true } : false); + element.addEventListener("touchmove", (e) => this.onTouchMove(e), hasPassiveOption ? { passive: true } : false); + element.addEventListener("touchend", (e) => this.onTouchEnd(e), hasPassiveOption ? { passive: true } : false); + element.addEventListener("touchcancel", () => this.reset(), hasPassiveOption ? { passive: true } : false); }); } } |