core/util/logging.js

   1 /*
   2  * noVNC: HTML5 VNC client
   3  * Copyright (C) 2019 The noVNC Authors
   4  * Licensed under MPL 2.0 (see LICENSE.txt)
   5  *
   6  * See README.md for usage and integration instructions.
   7  */
   8
   9 /*
  10  * Logging/debug routines
  11  */
  12
  13 let _log_level = 'warn';
  14
  15 let Debug = () => {};
  16 let Info = () => {};
  17 let Warn = () => {};
  18 let Error = () => {};
  19
  20 export function init_logging(level) {
  21     if (typeof level === 'undefined') {
  22         level = _log_level;
  23     } else {
  24         _log_level = level;
  25     }
  26
  27     Debug = Info = Warn = Error = () => {};
  28
  29     if (typeof window.console !== "undefined") {
  30         /* eslint-disable no-console, no-fallthrough */
  31         switch (level) {
  32             case 'debug':
  33                 Debug = console.debug.bind(window.console);
  34             case 'info':
  35                 Info  = console.info.bind(window.console);
  36             case 'warn':
  37                 Warn  = console.warn.bind(window.console);
  38             case 'error':
  39                 Error = console.error.bind(window.console);
  40             case 'none':
  41                 break;
  42             default:
  43                 throw new window.Error("invalid logging type '" + level + "'");
  44         }
  45         /* eslint-enable no-console, no-fallthrough */
  46     }
  47 }
  48
  49 export function get_logging() {
  50     return _log_level;
  51 }
  52
  53 export { Debug, Info, Warn, Error };
  54
  55 // Initialize logging level
  56 init_logging();