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Ensure sourceURL support doesn't cause errors in Adobe's JS engine.

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Former-commit-id: 2ad1214e6a58832c732499b272ebfc434953213b
This commit is contained in:
John-David Dalton
2012-06-12 19:28:47 -04:00
parent a5873a3158
commit b60d43e5f6
2 changed files with 17 additions and 8 deletions
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2
build/pre-compile.js
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@@ -217,7 +217,7 @@
source = source.replace('"\';\\n"', '"\';"');
// remove debug sourceURL in `_.template`
source = source.replace(/\+(?:\s*\/\/.*)*\s*'\/\/@ sourceURL=[^;]+/, '');
source = source.replace(/(?:\s*\/\/.*\n)* *if *\(useSourceURL[^}]+}/, '');
// minify `_.sortBy` internal properties
(function() {

23
lodash.js
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@@ -54,6 +54,12 @@
/** Used to store tokenized template text snippets */
var tokenized = [];
/** Detect if sourceURL syntax is usable without erroring */
try {
// Adobe's and Narwhal's JS engines will error
var useSourceURL = (Function('//@')(), true);
} catch(e){ }
/**
* Used to escape characters for inclusion in HTML.
* The `>` and `/` characters don't require escaping in HTML and have no
@@ -2641,8 +2647,9 @@
// ensure both objects have the same number of properties
if (result) {
for (prop in b) {
// Adobe JS engines have an operator precedence bug that causes `!size--`
// to produce the wrong result so it must be wrapped in parentheses.
// Adobe's JS engine, embedded in applications like InDesign, has a
// bug that causes `!size--` to throw an error so it must be wrapped
// in parentheses.
// https://github.com/documentcloud/underscore/issues/355
if (hasOwnProperty.call(b, prop) && !(size--)) {
break;
@@ -3208,11 +3215,13 @@
'var __p, __t, __j = Array.prototype.join;\n' +
'function print() { __p += __j.call(arguments, \'\') }\n' +
text +
'return __p\n}\n' +
// add sourceURL for easier debugging
// (Narwhal requires a trailing newline to prevent a syntax error)
// http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
'//@ sourceURL=/lodash/template/source[' + (templateCounter++) + ']\n';
'return __p\n}';
// add a sourceURL for easier debugging
// http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
if (useSourceURL) {
text += '\n//@ sourceURL=/lodash/template/source[' + (templateCounter++) + ']';
}
result = Function('_', 'return ' + text)(lodash);