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authorMatt A. Tobin <email@mattatobin.com>2018-02-09 06:46:43 -0500
committerMatt A. Tobin <email@mattatobin.com>2018-02-09 06:46:43 -0500
commitac46df8daea09899ce30dc8fd70986e258c746bf (patch)
tree2750d3125fc253fd5b0671e4bd268eff1fd97296 /toolkit/jetpack/sdk/console/traceback.js
parent8cecf8d5208f3945b35f879bba3015bb1a11bec6 (diff)
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Move Add-on SDK source to toolkit/jetpack
Diffstat (limited to 'toolkit/jetpack/sdk/console/traceback.js')
-rw-r--r--toolkit/jetpack/sdk/console/traceback.js86
1 files changed, 86 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/console/traceback.js b/toolkit/jetpack/sdk/console/traceback.js
new file mode 100644
index 000000000..be0fb7b94
--- /dev/null
+++ b/toolkit/jetpack/sdk/console/traceback.js
@@ -0,0 +1,86 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+ "stability": "experimental"
+};
+
+const { Ci, components } = require("chrome");
+const { parseStack, sourceURI } = require("toolkit/loader");
+const { readURISync } = require("../net/url");
+
+function safeGetFileLine(path, line) {
+ try {
+ var scheme = require("../url").URL(path).scheme;
+ // TODO: There should be an easier, more accurate way to figure out
+ // what's the case here.
+ if (!(scheme == "http" || scheme == "https"))
+ return readURISync(path).split("\n")[line - 1];
+ } catch (e) {}
+ return null;
+}
+
+function nsIStackFramesToJSON(frame) {
+ var stack = [];
+
+ while (frame) {
+ if (frame.filename) {
+ stack.unshift({
+ fileName: sourceURI(frame.filename),
+ lineNumber: frame.lineNumber,
+ name: frame.name
+ });
+ }
+ frame = frame.caller;
+ }
+
+ return stack;
+};
+
+var fromException = exports.fromException = function fromException(e) {
+ if (e instanceof Ci.nsIException)
+ return nsIStackFramesToJSON(e.location);
+ if (e.stack && e.stack.length)
+ return parseStack(e.stack);
+ if (e.fileName && typeof(e.lineNumber == "number"))
+ return [{fileName: sourceURI(e.fileName),
+ lineNumber: e.lineNumber,
+ name: null}];
+ return [];
+};
+
+var get = exports.get = function get() {
+ return nsIStackFramesToJSON(components.stack.caller);
+};
+
+var format = exports.format = function format(tbOrException) {
+ if (tbOrException === undefined) {
+ tbOrException = get();
+ tbOrException.pop();
+ }
+
+ var tb;
+ if (typeof(tbOrException) == "object" &&
+ tbOrException.constructor.name == "Array")
+ tb = tbOrException;
+ else
+ tb = fromException(tbOrException);
+
+ var lines = ["Traceback (most recent call last):"];
+
+ tb.forEach(
+ function(frame) {
+ if (!(frame.fileName || frame.lineNumber || frame.name))
+ return;
+
+ lines.push(' File "' + frame.fileName + '", line ' +
+ frame.lineNumber + ', in ' + frame.name);
+ var sourceLine = safeGetFileLine(frame.fileName, frame.lineNumber);
+ if (sourceLine)
+ lines.push(' ' + sourceLine.trim());
+ });
+
+ return lines.join("\n");
+};