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/**
* @fileoverview Prevent access to CPOWs in browser mochitests.
*
* 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";
// -----------------------------------------------------------------------------
// Rule Definition
// -----------------------------------------------------------------------------
var helpers = require("../helpers");
var cpows = [
/^gBrowser\.contentWindow/,
/^gBrowser\.contentDocument/,
/^gBrowser\.selectedBrowser.contentWindow/,
/^browser\.contentDocument/,
/^window\.content/
];
var isInContentTask = false;
module.exports = function(context) {
// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
function showError(node, identifier) {
if (isInContentTask) {
return;
}
context.report({
node: node,
message: identifier +
" is a possible Cross Process Object Wrapper (CPOW)."
});
}
function isContentTask(node) {
return node &&
node.type === "MemberExpression" &&
node.property.type === "Identifier" &&
node.property.name === "spawn" &&
node.object.type === "Identifier" &&
node.object.name === "ContentTask";
}
// ---------------------------------------------------------------------------
// Public
// ---------------------------------------------------------------------------
return {
CallExpression: function(node) {
if (isContentTask(node.callee)) {
isInContentTask = true;
}
},
"CallExpression:exit": function(node) {
if (isContentTask(node.callee)) {
isInContentTask = false;
}
},
MemberExpression: function(node) {
if (helpers.getTestType(this) != "browser") {
return;
}
var expression = context.getSource(node);
// Only report a single CPOW error per node -- so if checking
// |cpows| reports one, don't report another below.
var someCpowFound = cpows.some(function(cpow) {
if (cpow.test(expression)) {
showError(node, expression);
return true;
}
return false;
});
if (!someCpowFound && helpers.getIsGlobalScope(context.getAncestors())) {
if (/^content\./.test(expression)) {
showError(node, expression);
return;
}
}
},
Identifier: function(node) {
if (helpers.getTestType(this) != "browser") {
return;
}
var expression = context.getSource(node);
if (expression == "content" || /^content\./.test(expression)) {
if (node.parent.type === "MemberExpression" &&
node.parent.object &&
node.parent.object.type === "Identifier" &&
node.parent.object.name != "content") {
return;
}
showError(node, expression);
return;
}
}
};
};
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