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44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at http://mozilla.org/MPL/2.0/. */
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var EXPORTED_SYMBOLS = ['findCallerFrame'];
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/**
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* @namespace Defines utility methods for handling stack frames
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*/
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/**
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* Find the frame to use for logging the test result. If a start frame has
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* been specified, we walk down the stack until a frame with the same filename
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* as the start frame has been found. The next file in the stack will be the
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* frame to use for logging the result.
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*
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* @memberOf stack
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* @param {Object} [aStartFrame=Components.stack] Frame to start from walking up the stack.
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* @returns {Object} Frame of the stack to use for logging the result.
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*/
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function findCallerFrame(aStartFrame) {
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let frame = Components.stack;
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let filename = frame.filename.replace(/(.*)-> /, "");
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// If a start frame has been specified, walk up the stack until we have
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// found the corresponding file
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if (aStartFrame) {
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filename = aStartFrame.filename.replace(/(.*)-> /, "");
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while (frame.caller &&
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frame.filename && (frame.filename.indexOf(filename) == -1)) {
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frame = frame.caller;
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}
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}
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// Walk even up more until the next file has been found
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while (frame.caller &&
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(!frame.filename || (frame.filename.indexOf(filename) != -1)))
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frame = frame.caller;
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return frame;
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}
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