Add Magic Remote directional navigation and OK activation

tests/remote-navigation.test.js

@@ -0,0 +1,29 @@
+const assert=require('assert');
+const fs=require('fs');
+const path=require('path');
+const vm=require('vm');
+const handlers={},windowHandlers={};
+const doc={activeElement:null,addEventListener(type,handler){handlers[type]=handler;}};
+const buttons=['start','stop','refresh','autostart'].map(id=>({
+ id,disabled:false,clicks:0,handlers:{},
+ addEventListener(type,handler){this.handlers[type]=handler;},
+ focus(){doc.activeElement=this;this.handlers.focus();},
+ click(){this.clicks++;}
+}));
+const context={};vm.createContext(context);
+vm.runInContext(fs.readFileSync(path.join(__dirname,'../app/remote.js'),'utf8'),context);
+context.setupRemoteNavigation(buttons,doc,{addEventListener(type,handler){windowHandlers[type]=handler;}});
+function key(code,type='keydown',repeat=false){let prevented=false;handlers[type]({keyCode:code,repeat,preventDefault(){prevented=true;}});return prevented;}
+buttons[0].focus();assert(key(39));assert.equal(doc.activeElement.id,'stop');
+key(37);assert.equal(doc.activeElement.id,'start');key(37);assert.equal(doc.activeElement.id,'autostart');
+key(39);assert.equal(doc.activeElement.id,'start');
+buttons[1].disabled=true;key(39);assert.equal(doc.activeElement.id,'refresh');
+key(13);assert.equal(buttons[2].clicks,1);key(13);key(13,'keydown',true);assert.equal(buttons[2].clicks,1);
+key(13,'keyup');key(13);assert.equal(buttons[2].clicks,2);key(13,'keyup');
+buttons[3].handlers.mouseenter();assert.equal(doc.activeElement.id,'autostart');key(37);assert.equal(doc.activeElement.id,'refresh');
+doc.activeElement=null;key(39);assert.equal(doc.activeElement.id,'refresh');
+assert(!key(461));assert(!key(65));
+key(40);assert.equal(doc.activeElement.id,'autostart');key(38);assert.equal(doc.activeElement.id,'refresh');
+key(13);windowHandlers.blur();key(13);assert.equal(buttons[2].clicks,4);
+buttons.forEach(button=>button.disabled=true);assert(key(39));
+console.log('PASS: arrow navigation, wraparound, disabled controls, OK once per press, pointer handoff, focus recovery, Back preserved');