Diff: base/web-ajax-class.js

Revision:

110:8ab752842d25

Parent:

109:3e82f62c7e1f

Child:

111:aaa858678e34

--- a/base/web-ajax-class.js	Mon Apr 29 14:45:30 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,146 +0,0 @@
-//Ajax class
-'use strict';
-
-//Exposed properties
-let ajaxResponse_   = '';
-let ajaxHeaders_    = '';
-let ajaxDate_       = null;
-let ajaxMs_         =  0;
-let ajaxOnResponse_ = null;
-let ajaxOnTick_     = null;
-let ajaxServer_     = '';
-
-//Private variables
-let   ajaxOverrideBlockUpdateOnFocus_ = false;
-let   ajaxXhr_                        =  null;
-let   ajaxMsCountAtAjaxSend_          =     0;
-const ajaxTickMs_                     =   100;
-const ajaxUpdateMs_                   = 10000;
-
-//Private utilities
-function ajaxGetElementOrNull_(elementName) //Returns the element if it: exists; block is overidden; does not have focus
-{
-    let elem = document.getElementById(elementName);
-    if (!elem) return null;
-    if (ajaxOverrideBlockUpdateOnFocus_) return elem;
-    if (elem !== document.activeElement) return elem;
-    return null;
-}
-function ajaxHexToBit_(text, iBit)
-{
-   let value = parseInt(text, 16);
-   value >>= iBit;
-   return value & 1;
-}
-function ajaxHexToSignedInt8_(text)
-{
-    let value = parseInt(text, 16);
-    if (value < 0x80) return value;
-    return value - 0x100;
-}
-function ajaxHexToSignedInt16_(text)
-{
-    let value = parseInt(text, 16);
-    if (value < 0x8000) return value;
-    return value - 0x10000;
-}
-function ajaxHexToSignedInt32_(text)
-{
-    let value = parseInt(text, 16);
-    if (value < 0x80000000) return value;
-    return value - 0x100000000;
-}
-
-
-//Private ajax functions
-function ajaxHandleAjaxResponse_()
-{
-   if (ajaxXhr_.readyState == 4 && ajaxXhr_.status == 200)
-   {
-        ajaxResponse_ = ajaxXhr_.responseText;
-        ajaxHeaders_  = ajaxXhr_.getAllResponseHeaders();
-        let iDateStart = Ajax.headers.toLowerCase().indexOf('date:');
-        let iDateEnd   = Ajax.headers.indexOf('\r', iDateStart);
-        ajaxDate_      = new Date(Ajax.headers.slice(iDateStart + 5, iDateEnd));
-
-        let elem;
-        elem = ajaxGetElementOrNull_('ajax-response'   ); if (elem) elem.textContent = ajaxResponse_;
-        elem = ajaxGetElementOrNull_('ajax-headers'    ); if (elem) elem.textContent = ajaxHeaders_;
-        elem = ajaxGetElementOrNull_('ajax-date-local' );
-        if (elem)
-        {
-            elem.textContent = ajaxDate_.toLocaleString(    undefined, {  weekday     : 'short'  ,
-                                                                          day         : '2-digit',
-                                                                          month       : 'short'  ,
-                                                                          year        : 'numeric',
-                                                                          hour        : '2-digit',
-                                                                          minute      : '2-digit',
-                                                                          timeZoneName: 'short'
-                                                                       }
-                                                       );
-        }
-        if (ajaxOnResponse_) ajaxOnResponse_();
-        ajaxOverrideBlockUpdateOnFocus_ = false; //Received response so reset override after display
-   }
-}
-function ajaxSendAjaxRequest_(request) //Used by this script and from HTML page
-{
-    ajaxXhr_ = new XMLHttpRequest();
-    ajaxXhr_.onreadystatechange = ajaxHandleAjaxResponse_;
-    if (request)
-    {
-        request = request.split('+').join('%2B');
-        ajaxXhr_.open('GET', ajaxServer_ + '?' + request, true);
-    }
-    else
-    {
-        ajaxXhr_.open('GET', ajaxServer_                , true);
-    }
-    ajaxXhr_.send();
-    ajaxMsCountAtAjaxSend_ = ajaxMs_;
-}
-function AjaxRequest(request) //From html
-{
-    ajaxOverrideBlockUpdateOnFocus_ = true; //Request has come from an update
-    ajaxSendAjaxRequest_(request);
-}
-
-//Private functions
-function ajaxTick_() //Called about every 100ms
-{
-    ajaxMs_ += ajaxTickMs_; //Don't use Date.now() as we don't know when the PC's clock will be updated around a leap second
-    if (ajaxMs_ >= ajaxMsCountAtAjaxSend_ + ajaxUpdateMs_) ajaxSendAjaxRequest_('');
-    if (ajaxOnTick_) ajaxOnTick_();
-}
-function ajaxInit_()
-{
-    setInterval(ajaxTick_, ajaxTickMs_);
-    ajaxSendAjaxRequest_('');
-}
-
-//Exposed public
-class Ajax
-{
-    static get ms        ()  { return ajaxMs_         ; }
-    static get response  ()  { return ajaxResponse_   ; }
-    static get headers   ()  { return ajaxHeaders_    ; }
-    static get date      ()  { return ajaxDate_       ; }
-    
-    static set tickMs    (v) { ajaxTickMs_     = v; }
-    static set updateMs  (v) { ajaxUpdateMs_   = v; }
-    static set server    (v) { ajaxServer_     = v; }
-    static set onResponse(v) { ajaxOnResponse_ = v; }
-    static set onTick    (v) { ajaxOnTick_     = v; }
-
-    static getElementOrNull(elementName) { return ajaxGetElementOrNull_(elementName) ; }
-    static hexToBit        (text, iBit ) { return ajaxHexToBit_        (text, iBit ) ; }
-    static hexToSignedInt8 (text       ) { return ajaxHexToSignedInt8_ (text       ) ; }
-    static hexToSignedInt16(text       ) { return ajaxHexToSignedInt16_(text       ) ; }
-    static hexToSignedInt32(text       ) { return ajaxHexToSignedInt32_(text       ) ; }
-    
-    static init()
-    {
-        if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', ajaxInit_ ); // Loading hasn't finished yet
-        else                                                                                 ajaxInit_(); //`DOMContentLoaded` has already fired
-    }
-}
\ No newline at end of file