third_party/chromevox/chromeVoxKbExplorerScript.js

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cvox.ChromeVox.isChromeOS=-1!=navigator.userAgent.indexOf("CrOS");cvox.ChromeVox.isMac=-1!=navigator.platform.indexOf("Mac");cvox.ChromeVox.modKeyStr=cvox.ChromeVox.isChromeOS?"Shift+Search":cvox.ChromeVox.isMac?"Ctrl+Cmd":"Shift+Alt";cvox.ChromeVox.sequenceSwitchKeyCodes=[];cvox.ChromeVox.visitedUrls={};cvox.ChromeVox.markInUserCommand=function(){};cvox.ChromeVox.syncToNode=function(){};cvox.ChromeVox.speakNode=function(){};cvox.ChromeVox.executeUserCommand=function(){};
cvox.ChromeVox.entireDocumentIsHidden=!1;cvox.ChromeVox.storeOn=function(a){a.isStickyPrefOn=cvox.ChromeVox.isStickyPrefOn;cvox.ChromeVox.navigationManager.storeOn(a)};cvox.ChromeVox.readFrom=function(a){cvox.ChromeVox.isStickyPrefOn=a.isStickyPrefOn;cvox.ChromeVox.navigationManager.readFrom(a)};cvox.ChromeVox.isStickyModeOn=function(){return null!==cvox.ChromeVox.stickyOverride?cvox.ChromeVox.stickyOverride:cvox.ChromeVox.isStickyPrefOn};cvox.KeySequence=function(a,b,c,d){this.doubleTap=!!d;this.cvoxModifier=void 0==b?this.isCVoxModifierActive(a):b;this.stickyMode=!!a.stickyMode;this.prefixKey=!!a.keyPrefix;this.skipStripping=!!c;if(this.stickyMode&&this.prefixKey)throw"Prefix key and sticky mode cannot both be enabled: "+a;a=this.resolveChromeOSSpecialKeys_(a);this.keys={ctrlKey:[],searchKeyHeld:[],altKey:[],altGraphKey:[],shiftKey:[],metaKey:[],keyCode:[]};this.extractKey_(a)};
cvox.KeySequence.KEY_PRESS_CODE={39:222,44:188,45:189,46:190,47:191,59:186,91:219,92:220,93:221};cvox.KeySequence.doubleTapCache=[];cvox.KeySequence.prototype.addKeyEvent=function(a){if(1<this.keys.keyCode.length)return!1;this.extractKey_(a);return!0};cvox.KeySequence.prototype.equals=function(a){if(!this.checkKeyEquality_(a)||this.doubleTap!=a.doubleTap)return!1;if(this.cvoxModifier===a.cvoxModifier)return!0;a=this.cvoxModifier?a:this;return a.stickyMode||a.prefixKey};
cvox.KeySequence.prototype.extractKey_=function(a){for(var b in this.keys)if("keyCode"==b){var c;"keypress"==a.type&&97<=a[b]&&122>=a[b]?c=a[b]-32:"keypress"==a.type&&(c=cvox.KeySequence.KEY_PRESS_CODE[a[b]]);this.keys[b].push(c||a[b])}else this.isKeyModifierActive(a,b)?this.keys[b].push(!0):this.keys[b].push(!1);this.cvoxModifier&&this.rationalizeKeys_()};
cvox.KeySequence.prototype.rationalizeKeys_=function(){if(!this.skipStripping){var a=cvox.ChromeVox.modKeyStr.split(/\+/g),b=this.keys.keyCode.length-1;-1!=a.indexOf("Ctrl")&&(this.keys.ctrlKey[b]=!1);-1!=a.indexOf("Alt")&&(this.keys.altKey[b]=!1);-1!=a.indexOf("Shift")&&(this.keys.shiftKey[b]=!1);var c=this.getMetaKeyName_();if(-1!=a.indexOf(c))if("Search"==c)this.keys.searchKeyHeld[b]=!1;else if("Cmd"==c||"Win"==c)this.keys.metaKey[b]=!1}};
cvox.KeySequence.prototype.getMetaKeyName_=function(){return cvox.ChromeVox.isChromeOS?"Search":cvox.ChromeVox.isMac?"Cmd":"Win"};cvox.KeySequence.prototype.checkKeyEquality_=function(a){for(var b in this.keys)for(var c=this.keys[b].length;c--;)if(this.keys[b][c]!==a.keys[b][c])return!1;return!0};cvox.KeySequence.prototype.length=function(){return this.keys.keyCode.length};cvox.KeySequence.prototype.isModifierKey=function(a){return 16==a||17==a||18==a||91==a||93==a};
cvox.KeySequence.prototype.isCVoxModifierActive=function(a){var b=cvox.ChromeVox.modKeyStr.split(/\+/g);this.isKeyModifierActive(a,"ctrlKey")&&(b=b.filter(function(a){return"Ctrl"!=a}));this.isKeyModifierActive(a,"altKey")&&(b=b.filter(function(a){return"Alt"!=a}));this.isKeyModifierActive(a,"shiftKey")&&(b=b.filter(function(a){return"Shift"!=a}));if(this.isKeyModifierActive(a,"metaKey")||this.isKeyModifierActive(a,"searchKeyHeld"))var c=this.getMetaKeyName_(),b=b.filter(function(a){return a!=c});
return 0==b.length};cvox.KeySequence.prototype.isKeyModifierActive=function(a,b){switch(b){case "ctrlKey":return a.ctrlKey||17==a.keyCode;case "altKey":return a.altKey||18==a.keyCode;case "shiftKey":return a.shiftKey||16==a.keyCode;case "metaKey":return a.metaKey||!cvox.ChromeVox.isChromeOS&&91==a.keyCode;case "searchKeyHeld":return cvox.ChromeVox.isChromeOS&&91==a.keyCode||a.searchKeyHeld}return!1};
cvox.KeySequence.deserialize=function(a){var b={};b.stickyMode=void 0==a.stickyMode?!1:a.stickyMode;b.prefixKey=void 0==a.prefixKey?!1:a.prefixKey;var c=1<a.keys.keyCode.length,d={},e;for(e in a.keys)b[e]=a.keys[e][0],c&&(d[e]=a.keys[e][1]);e=new cvox.KeySequence(b,a.cvoxModifier,!0,a.doubleTap);c&&(cvox.ChromeVox.sequenceSwitchKeyCodes.push(new cvox.KeySequence(b,a.cvoxModifier)),e.addKeyEvent(d));a.doubleTap&&cvox.KeySequence.doubleTapCache.push(e);return e};
cvox.KeySequence.fromStr=function(a){var b={},c={},d;d=-1==a.indexOf(">")?!1:!0;var e=!1;b.stickyMode=!1;b.prefixKey=!1;a=a.split("+");for(var h=0;h<a.length;h++)for(var f=a[h].split(">"),g=0;g<f.length;g++){if("#"==f[g].charAt(0)){var k=parseInt(f[g].substr(1),10);0<g?c.keyCode=k:b.keyCode=k}k=f[g];1==f[g].length?0<g?c.keyCode=f[g].charCodeAt(0):b.keyCode=f[g].charCodeAt(0):(0<g?cvox.KeySequence.setModifiersOnEvent_(k,c):cvox.KeySequence.setModifiersOnEvent_(k,b),"Cvox"==k&&(e=!0))}b=new cvox.KeySequence(b,
e);d&&b.addKeyEvent(c);return b};cvox.KeySequence.setModifiersOnEvent_=function(a,b){"Ctrl"==a?(b.ctrlKey=!0,b.keyCode=17):"Alt"==a?(b.altKey=!0,b.keyCode=18):"Shift"==a?(b.shiftKey=!0,b.keyCode=16):"Search"==a?(b.searchKeyHeld=!0,b.keyCode=91):"Cmd"==a?(b.metaKey=!0,b.keyCode=91):"Win"==a?(b.metaKey=!0,b.keyCode=91):"Insert"==a&&(b.keyCode=45)};
cvox.KeySequence.prototype.resolveChromeOSSpecialKeys_=function(a){if(!this.cvoxModifier||this.stickyMode||this.prefixKey||!cvox.ChromeVox.isChromeOS)return a;var b={},c;for(c in a)b[c]=a[c];switch(b.keyCode){case 33:b.keyCode=38;break;case 34:b.keyCode=40;break;case 35:b.keyCode=39;break;case 36:b.keyCode=37;break;case 45:b.keyCode=190;break;case 46:b.keyCode=8;break;case 112:b.keyCode=49;break;case 113:b.keyCode=50;break;case 114:b.keyCode=51;break;case 115:b.keyCode=52;break;case 116:b.keyCode=
53;break;case 117:b.keyCode=54;break;case 118:b.keyCode=55;break;case 119:b.keyCode=56;break;case 120:b.keyCode=57;break;case 121:b.keyCode=48;break;case 122:b.keyCode=189;break;case 123:b.keyCode=187}return b};cvox.KeyUtil=function(){};cvox.KeyUtil.modeKeyPressTime=0;cvox.KeyUtil.sequencing=!1;cvox.KeyUtil.prevKeySequence=null;cvox.KeyUtil.stickyKeySequence=null;cvox.KeyUtil.maxSeqLength=2;
cvox.KeyUtil.keyEventToKeySequence=function(a){var b=cvox.KeyUtil;b.prevKeySequence&&b.maxSeqLength==b.prevKeySequence.length()&&(b.sequencing=!1,b.prevKeySequence=null);var c=b.sequencing||a.keyPrefix||a.stickyMode,d=new cvox.KeySequence(a),e=d.cvoxModifier;if(c||e){if(!b.sequencing&&b.isSequenceSwitchKeyCode(d))return b.sequencing=!0,b.prevKeySequence=d;if(b.sequencing){if(b.prevKeySequence.addKeyEvent(a))return d=b.prevKeySequence,b.prevKeySequence=null,b.sequencing=!1,d;throw"Think sequencing is enabled, yet util.prevKeySequence alreadyhas two key codes"+
b.prevKeySequence;}}else b.sequencing=!1;c=(new Date).getTime();if(cvox.KeyUtil.isDoubleTapKey(d)&&b.prevKeySequence&&d.equals(b.prevKeySequence)&&(e=b.modeKeyPressTime,0<e&&300>c-e))return d=b.prevKeySequence,d.doubleTap=!0,b.prevKeySequence=null,b.sequencing=!1,cvox.ChromeVox.isChromeOS&&a.keyCode==cvox.KeyUtil.getStickyKeyCode()&&(cvox.ChromeVox.searchKeyHeld=!1),d;b.prevKeySequence=d;b.modeKeyPressTime=c;return d};
cvox.KeyUtil.keyCodeToString=function(a){return 17==a?"Ctrl":18==a?"Alt":16==a?"Shift":91==a||93==a?cvox.ChromeVox.isChromeOS?"Search":cvox.ChromeVox.isMac?"Cmd":"Win":45==a?"Insert":65<=a&&90>=a?String.fromCharCode(a):48<=a&&57>=a?String.fromCharCode(a):"#"+a};cvox.KeyUtil.modStringToKeyCode=function(a){switch(a){case "Ctrl":return 17;case "Alt":return 18;case "Shift":return 16;case "Cmd":case "Win":return 91}return-1};
cvox.KeyUtil.cvoxModKeyCodes=function(){var a=cvox.ChromeVox.modKeyStr.split(/\+/g);return a=a.map(function(a){return cvox.KeyUtil.modStringToKeyCode(a)})};cvox.KeyUtil.isSequenceSwitchKeyCode=function(a){for(var b=0;b<cvox.ChromeVox.sequenceSwitchKeyCodes.length;b++){var c=cvox.ChromeVox.sequenceSwitchKeyCodes[b];if(c.equals(a))return!0}return!1};
cvox.KeyUtil.getReadableNameForKeyCode=function(a){if(0==a)return"Power button";if(17==a)return"Control";if(18==a)return"Alt";if(16==a)return"Shift";if(9==a)return"Tab";if(91==a||93==a)return cvox.ChromeVox.isChromeOS?"Search":cvox.ChromeVox.isMac?"Cmd":"Win";if(8==a)return"Backspace";if(32==a)return"Space";if(35==a)return"end";if(36==a)return"home";if(37==a)return"Left arrow";if(38==a)return"Up arrow";if(39==a)return"Right arrow";if(40==a)return"Down arrow";if(45==a)return"Insert";if(13==a)return"Enter";
if(27==a)return"Escape";if(112==a)return cvox.ChromeVox.isChromeOS?"Back":"F1";if(113==a)return cvox.ChromeVox.isChromeOS?"Forward":"F2";if(114==a)return cvox.ChromeVox.isChromeOS?"Refresh":"F3";if(115==a)return cvox.ChromeVox.isChromeOS?"Toggle full screen":"F4";if(116==a)return"F5";if(117==a)return"F6";if(118==a)return"F7";if(119==a)return"F8";if(120==a)return"F9";if(121==a)return"F10";if(122==a)return"F11";if(123==a)return"F12";if(186==a)return"Semicolon";if(187==a)return"Equal sign";if(188==a)return"Comma";
if(189==a)return"Dash";if(190==a)return"Period";if(191==a)return"Forward slash";if(192==a)return"Grave accent";if(219==a)return"Open bracket";if(220==a)return"Back slash";if(221==a)return"Close bracket";if(222==a)return"Single quote";if(115==a)return"Toggle full screen";if(48<=a&&90>=a)return String.fromCharCode(a)};cvox.KeyUtil.getStickyKeyCode=function(){var a=45;if(cvox.ChromeVox.isChromeOS||cvox.ChromeVox.isMac)a=91;return a};
cvox.KeyUtil.getStickyKeySequence=function(){if(null==cvox.KeyUtil.stickyKeySequence){var a=cvox.KeyUtil.getStickyKeyCode(),a={keyCode:a,stickyMode:!0},b=new cvox.KeySequence(a);b.addKeyEvent(a);cvox.KeyUtil.stickyKeySequence=b}return cvox.KeyUtil.stickyKeySequence};cvox.KeyUtil.getReadableNameForStr=function(){return null};
cvox.KeyUtil.keySequenceToString=function(a,b,c){for(var d="",e=a.length(),h=0;h<e;h++){""==d||c?""!=d&&(d+="+"):d+=">";var f="",g;for(g in a.keys)if(a.keys[g][h]){var k="";switch(g){case "ctrlKey":k="Ctrl";break;case "searchKeyHeld":k=cvox.KeyUtil.getReadableNameForKeyCode(91);break;case "altKey":k="Alt";break;case "altGraphKey":k="AltGraph";break;case "shiftKey":k="Shift";break;case "metaKey":k=cvox.KeyUtil.getReadableNameForKeyCode(91);break;case "keyCode":var l=a.keys[g][h];a.isModifierKey(l)||
c||(f=b?f+cvox.KeyUtil.getReadableNameForKeyCode(l):f+cvox.KeyUtil.keyCodeToString(l))}-1==d.indexOf(k)&&(f+=k+"+")}d+=f;"+"==d[d.length-1]&&(d=d.slice(0,-1))}a.cvoxModifier||a.prefixKey?d=""!=d?"Cvox+"+d:"Cvox":a.stickyMode&&(">"==d[d.length-1]&&(d=d.slice(0,-1)),d=d+"+"+d);return d};cvox.KeyUtil.isDoubleTapKey=function(a){var b=!1,c=a.doubleTap;a.doubleTap=!0;for(var d=0,e;e=cvox.KeySequence.doubleTapCache[d];d++)if(e.equals(a)){b=!0;break}a.doubleTap=c;return b};cvox.KbExplorer=function(){};cvox.KbExplorer.init=function(){document.addEventListener("keydown",cvox.KbExplorer.onKeyDown,!1);document.addEventListener("keyup",cvox.KbExplorer.onKeyUp,!1);document.addEventListener("keypress",cvox.KbExplorer.onKeyPress,!1)};cvox.KbExplorer.onKeyDown=function(a){chrome.extension.getBackgroundPage().speak(cvox.KeyUtil.getReadableNameForKeyCode(a.keyCode),!1,{});a.preventDefault();a.stopPropagation()};cvox.KbExplorer.onKeyUp=function(a){a.preventDefault();a.stopPropagation()};
cvox.KbExplorer.onKeyPress=function(a){a.preventDefault();a.stopPropagation()};document.addEventListener("DOMContentLoaded",function(){cvox.KbExplorer.init()},!1);