twitst4tz

twitter statistics web application
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callsite-tostring.js (2229B)

      1 /*!
      2  * depd
      3  * Copyright(c) 2014 Douglas Christopher Wilson
      4  * MIT Licensed
      5  */
      6 
      7 'use strict'
      8 
      9 /**
     10  * Module exports.
     11  */
     12 
     13 module.exports = callSiteToString
     14 
     15 /**
     16  * Format a CallSite file location to a string.
     17  */
     18 
     19 function callSiteFileLocation (callSite) {
     20   var fileName
     21   var fileLocation = ''
     22 
     23   if (callSite.isNative()) {
     24     fileLocation = 'native'
     25   } else if (callSite.isEval()) {
     26     fileName = callSite.getScriptNameOrSourceURL()
     27     if (!fileName) {
     28       fileLocation = callSite.getEvalOrigin()
     29     }
     30   } else {
     31     fileName = callSite.getFileName()
     32   }
     33 
     34   if (fileName) {
     35     fileLocation += fileName
     36 
     37     var lineNumber = callSite.getLineNumber()
     38     if (lineNumber != null) {
     39       fileLocation += ':' + lineNumber
     40 
     41       var columnNumber = callSite.getColumnNumber()
     42       if (columnNumber) {
     43         fileLocation += ':' + columnNumber
     44       }
     45     }
     46   }
     47 
     48   return fileLocation || 'unknown source'
     49 }
     50 
     51 /**
     52  * Format a CallSite to a string.
     53  */
     54 
     55 function callSiteToString (callSite) {
     56   var addSuffix = true
     57   var fileLocation = callSiteFileLocation(callSite)
     58   var functionName = callSite.getFunctionName()
     59   var isConstructor = callSite.isConstructor()
     60   var isMethodCall = !(callSite.isToplevel() || isConstructor)
     61   var line = ''
     62 
     63   if (isMethodCall) {
     64     var methodName = callSite.getMethodName()
     65     var typeName = getConstructorName(callSite)
     66 
     67     if (functionName) {
     68       if (typeName && functionName.indexOf(typeName) !== 0) {
     69         line += typeName + '.'
     70       }
     71 
     72       line += functionName
     73 
     74       if (methodName && functionName.lastIndexOf('.' + methodName) !== functionName.length - methodName.length - 1) {
     75         line += ' [as ' + methodName + ']'
     76       }
     77     } else {
     78       line += typeName + '.' + (methodName || '<anonymous>')
     79     }
     80   } else if (isConstructor) {
     81     line += 'new ' + (functionName || '<anonymous>')
     82   } else if (functionName) {
     83     line += functionName
     84   } else {
     85     addSuffix = false
     86     line += fileLocation
     87   }
     88 
     89   if (addSuffix) {
     90     line += ' (' + fileLocation + ')'
     91   }
     92 
     93   return line
     94 }
     95 
     96 /**
     97  * Get constructor name of reviver.
     98  */
     99 
    100 function getConstructorName (obj) {
    101   var receiver = obj.receiver
    102   return (receiver.constructor && receiver.constructor.name) || null
    103 }