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| 1 | +/* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | + * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| 3 | + * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 4 | +"use strict"; |
| 5 | + |
| 6 | +const global = this; |
| 7 | + |
| 8 | +Instances.register("ScriptError", "@mozilla.org/scripterror;1", "nsIScriptError", "init"); |
| 9 | + |
| 10 | +var UNKNOWN_STACK = { |
| 11 | + stackMsg: "", |
| 12 | + sourceName: "unknown", |
| 13 | + sourceLine: "", |
| 14 | + lineNumber: 0, |
| 15 | + columnNumber: 0 |
| 16 | +}; |
| 17 | +Object.freeze(UNKNOWN_STACK); |
| 18 | + |
| 19 | +function prepareStack(stack) { |
| 20 | + if (!stack || !(stack instanceof Ci.nsIStackFrame)) { |
| 21 | + stack = Components.stack; |
| 22 | + for (let i = 0; stack && i < 2; ++i) { |
| 23 | + stack = stack.caller; |
| 24 | + } |
| 25 | + if (!stack) { |
| 26 | + return UNKNOWN_STACK; |
| 27 | + } |
| 28 | + } |
| 29 | + let rv = {}; |
| 30 | + rv.sourceName = stack.filename; |
| 31 | + rv.sourceLine = stack.sourceLine; |
| 32 | + rv.lineNumber = stack.lineNumber; |
| 33 | + let message = []; |
| 34 | + for (let i = 0; stack && i < 6; ++i, stack = stack.caller) { |
| 35 | + if (stack.lineNumber) { |
| 36 | + message.push("\t" + (stack.name || "[anonymous]") + "() @ " + stack.filename + ":" + stack.lineNumber); |
| 37 | + } |
| 38 | + else { |
| 39 | + message.push("\t[native @ " + (stack.languageName || "???" ) + "]"); |
| 40 | + } |
| 41 | + } |
| 42 | + rv.stackMsg = message.join("\n"); |
| 43 | + rv.prototype = UNKNOWN_STACK; |
| 44 | + return rv; |
| 45 | +} |
| 46 | + |
| 47 | +const { |
| 48 | + errorFlag, |
| 49 | + warningFlag, |
| 50 | + exceptionFlag |
| 51 | +} = Ci.nsIScriptError; |
| 52 | + |
| 53 | +Object.defineProperties(exports, { |
| 54 | + LOG_DEBUG: {value: 0, enumerable: true}, |
| 55 | + LOG_INFO: {value: 1, enumerable: true}, |
| 56 | + LOG_ERROR: {value: 2, enumerable: true}, |
| 57 | + LOG_NONE: {value: 0x7FFFFFFF}, |
| 58 | + PREFIX: {get: function() prefix}, |
| 59 | + setLogLevel: {value: function(l) global.level = l} |
| 60 | +}); |
| 61 | + |
| 62 | +var prefix = ADDON.name; |
| 63 | +var level = exports.LOG_NONE; |
| 64 | + |
| 65 | +exports.log = function(level, message, exception) { |
| 66 | + try { |
| 67 | + if (global.level > level) { |
| 68 | + return; |
| 69 | + } |
| 70 | + |
| 71 | + if (message instanceof Ci.nsIScriptError || message instanceof Ci.nsIException || message.fileName) { |
| 72 | + exception = message; |
| 73 | + message = exception.message; |
| 74 | + } |
| 75 | + else if (exception) { |
| 76 | + message = message + " [Exception: " + exception.message + "]"; |
| 77 | + } |
| 78 | + |
| 79 | + let { |
| 80 | + stackMsg, |
| 81 | + sourceName, |
| 82 | + sourceLine, |
| 83 | + lineNumber, |
| 84 | + columnNumber |
| 85 | + } = prepareStack((exception && exception.location) || null); |
| 86 | + |
| 87 | + if (stackMsg) { |
| 88 | + message += "\n" + stackMsg; |
| 89 | + } |
| 90 | + |
| 91 | + let category = "component javascript"; |
| 92 | + |
| 93 | + if (exception) { |
| 94 | + if (exception instanceof Ci.nsIScriptError) { |
| 95 | + sourceName = exception.sourceName; |
| 96 | + sourceLine = exception.sourceLine; |
| 97 | + lineNumber = exception.lineNumber; |
| 98 | + columnNumber = exception.columnNumber; |
| 99 | + category = exception.category; |
| 100 | + } |
| 101 | + else if (exception instanceof Ci.nsIException) { |
| 102 | + sourceName = exception.filename; |
| 103 | + lineNumber = exception.lineNumber; |
| 104 | + } |
| 105 | + else { |
| 106 | + sourceName = exception.fileName || sourceName; |
| 107 | + lineNumber = exception.lineNumber || lineNumber; |
| 108 | + } |
| 109 | + } |
| 110 | + |
| 111 | + let levelMsg; |
| 112 | + switch (level) { |
| 113 | + case exports.LOG_ERROR: |
| 114 | + levelMsg = "error"; |
| 115 | + break; |
| 116 | + case exports.LOG_INFO: |
| 117 | + levelMsg = "info"; |
| 118 | + break; |
| 119 | + default: |
| 120 | + levelMsg = "debug"; |
| 121 | + } |
| 122 | + |
| 123 | + message = global.prefix + " (" + levelMsg + ") - " + message; |
| 124 | + |
| 125 | + const scriptError = new Instances.ScriptError( |
| 126 | + message, |
| 127 | + sourceName, |
| 128 | + sourceLine, |
| 129 | + lineNumber, |
| 130 | + columnNumber, |
| 131 | + level >= exports.LOG_ERROR ? errorFlag : warningFlag, |
| 132 | + category); |
| 133 | + Services.console.logMessage(scriptError); |
| 134 | + } |
| 135 | + catch (ex) { |
| 136 | + reportError("failed to log"); |
| 137 | + reportError(ex); |
| 138 | + reportError(exception || message); |
| 139 | + } |
| 140 | +} |
| 141 | + |
| 142 | +/* vim: set et ts=2 sw=2 : */ |
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