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/* 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/. */
var EXPORTED_SYMBOLS = ['findCallerFrame'];
/**
* @namespace Defines utility methods for handling stack frames
*/
/**
* Find the frame to use for logging the test result. If a start frame has
* been specified, we walk down the stack until a frame with the same filename
* as the start frame has been found. The next file in the stack will be the
* frame to use for logging the result.
*
* @memberOf stack
* @param {Object} [aStartFrame=Components.stack] Frame to start from walking up the stack.
* @returns {Object} Frame of the stack to use for logging the result.
*/
function findCallerFrame(aStartFrame) {
let frame = Components.stack;
let filename = frame.filename.replace(/(.*)-> /, "");
// If a start frame has been specified, walk up the stack until we have
// found the corresponding file
if (aStartFrame) {
filename = aStartFrame.filename.replace(/(.*)-> /, "");
while (frame.caller &&
frame.filename && (frame.filename.indexOf(filename) == -1)) {
frame = frame.caller;
}
}
// Walk even up more until the next file has been found
while (frame.caller &&
(!frame.filename || (frame.filename.indexOf(filename) != -1)))
frame = frame.caller;
return frame;
}
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