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getting stripping to work for individual tests (faking input)
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@SlexAxton
SlexAxton committed Nov 22, 2010
1 parent c88b933 commit 90eb824
Showing 1 changed file with 184 additions and 64 deletions.
248 changes: 184 additions & 64 deletions modulizr/js/modulizr.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,118 +16,238 @@
* Function ize
*
* @argument source {string} The marked up original source
* @argument modules {array} An array of strings that match identifiers in the source
* @argument tests {array} An array of strings that match test string identifiers in the source
*
* @returns {string} The new source with only the requested modules
*/
ize: function(source, modules){
ize: function(source, tests){
// Variables for string manipulation and saving
var strings = [],
sid = '_' + ( + new Date());
var js_notests,
js_nostr,
parsed,
i, j,
strings = [],
testStack = [],
sid = '_' + ( + new Date()),
multilinespaceExp = new RegExp(/\s{4}\n/g);

source = this._removeComments(source);

// Mark the tests
js_notests = source.replace(/tests\['(.*)'\]/g, function($0, $1) {
testStack[testStack.length] = {"code":$0, "name": $1};
return 'TEST__'+$1+'__'
});

// remove string literals
var js_nostr = source.replace(/("|')((?:\\\1|.)+?)\1/g, function($0) {
js_nostr = js_notestsstr.replace(/("|')((?:\\\1|.)+?)\1/g, function($0) {
strings[strings.length] = $0;
return sid;
return 'STR__'+(strings.length-1)+'__';
});

// filter each block
console.log(js_nostr);

// put the strings back where they belong!
var parsed = js_nostr.replace(RegExp(sid, 'g'), function() {
return strings.shift();
});
js_nostr = this._pullOutTests(js_nostr, ['flexbox', 'touch', 'geolocation']);

parsed = js_nostr;

for (j = 0; j < strings.length; j++) {
// put the strings back where they belong!
parsed = parsed.replace(RegExp("STR__"+j+"__", 'g'), function() {
return strings[j];
});
}

// put the test array declarations back where they go
for (i = 0; i < testStack.length; i++) {
parsed = parsed.replace(RegExp("TEST__"+testStack[i].name+"__", 'g'), function($0) {
return testStack[i].code;
});
}

// Strip out the 4space-newline stuff that's left over, just for fun.
while (multilinespaceExp.test(parsed)) {
parsed = parsed.replace(multilinespaceExp, "");
}

// return the altered version
return parsed;

},

_pullOutTests: function(source, wanted) {
var sub, i, j, start, end, name,
sub2, bracketStack, tests = {},
tmpStart, tmpEnd,
spaceOffset = 0;

// Step through the source
for (i = 0; i < source.length; i++) {
sub = source.substr(i, 6);
// If we find a test identifier
if (sub === "TEST__") {
// Save the beginning here
start = i;

// counts along the name
j = 0;

// Grab it's name
while (source.substr(i+j+6,2) !== '__') {
j++;
}
// Save the name
name = source.substr(i+6, j);

// update counter
i = i + j;

// Look for a function definition next
while (source.substr(i, 8) !== 'function') {
i++;
}

// Skip past the function def
i += 8;

// Look for the opening '{' character
while (source.substr(i, 1) !== '{') {
i++;
}

// Set the initial count
bracketStack = 1;
i++;

// Find an even amount of {} pairs
while(bracketStack) {
sub2 = source.substr(i,1);
if (sub2 === '{') {
bracketStack++;
}
else if (sub2 === '}') {
bracketStack--;
}
i++;
}
// Add the semicolon
end = i+1;

// Add this to the tests hash
tests[name] = {
"start": start,
"end": end
};
}
}

// Turn our wanted array into a hash, for speeedz
var wantedHash = (function(){
var hash = {}, k;
for(k = 0; k < wanted.length; k++) {
hash[wanted[k]] = true;
}
return hash;
})();

// go through the tests that we know about, and remove the ones we don't want
for (var test in tests) {
if (tests.hasOwnProperty(test)) {
// If it's not one that we want
if (!wantedHash[test]) {
tmpStart = tests[test].start;
tmpEnd = tests[test].end;
// Take it out
source = source.substr(0, tmpStart - spaceOffset) + source.substr(tmpEnd - spaceOffset);
spaceOffset += tmpEnd - tmpStart;
}
}
}
return source;
},

/*
* Stolen from james padolsey at
* http://james.padolsey.com/javascript/removing-comments-in-javascript/
* - This function is loosely based on the one found here:
* - http://www.weanswer.it/blog/optimize-css-javascript-remove-comments-php/
*/
_removeComments: function(str) {
str = ('__' + str + '__').split('');
var mode = {
singleQuote: false,
doubleQuote: false,
regex: false,
blockComment: false,
lineComment: false,
condComp: false
};
for (var i = 0, l = str.length; i < l; i++) {
str = ('__' + str + '__').split('');
var mode = {
singleQuote: false,
doubleQuote: false,
regex: false,
blockComment: false,
lineComment: false,
condComp: false
};
for (var i = 0, l = str.length; i < l; i++) {

if (mode.regex) {
if (str[i] === '/' && str[i-1] !== '\\') {
mode.regex = false;
}
continue;
if (str[i] === '/' && str[i-1] !== '\\') {
mode.regex = false;
}
continue;
}

if (mode.singleQuote) {
if (str[i] === "'" && str[i-1] !== '\\') {
mode.singleQuote = false;
}
continue;
if (str[i] === "'" && str[i-1] !== '\\') {
mode.singleQuote = false;
}
continue;
}

if (mode.doubleQuote) {
if (str[i] === '"' && str[i-1] !== '\\') {
mode.doubleQuote = false;
}
continue;
if (str[i] === '"' && str[i-1] !== '\\') {
mode.doubleQuote = false;
}
continue;
}

if (mode.blockComment) {
if (str[i] === '*' && str[i+1] === '/') {
str[i+1] = '';
mode.blockComment = false;
}
str[i] = '';
continue;
if (str[i] === '*' && str[i+1] === '/') {
str[i+1] = '';
mode.blockComment = false;
}
str[i] = '';
continue;
}

if (mode.lineComment) {
if (str[i+1] === '\n' || str[i+1] === '\r') {
mode.lineComment = false;
}
str[i] = '';
continue;
if (str[i+1] === '\n' || str[i+1] === '\r') {
mode.lineComment = false;
}
str[i] = '';
continue;
}

if (mode.condComp) {
if (str[i-2] === '@' && str[i-1] === '*' && str[i] === '/') {
mode.condComp = false;
}
continue;
if (str[i-2] === '@' && str[i-1] === '*' && str[i] === '/') {
mode.condComp = false;
}
continue;
}

mode.doubleQuote = str[i] === '"';
mode.singleQuote = str[i] === "'";

if (str[i] === '/') {

if (str[i+1] === '*' && str[i+2] === '@') {
mode.condComp = true;
continue;
}
if (str[i+1] === '*') {
str[i] = '';
mode.blockComment = true;
continue;
}
if (str[i+1] === '/') {
str[i] = '';
mode.lineComment = true;
continue;
}
mode.regex = true;
if (str[i+1] === '*' && str[i+2] === '@') {
mode.condComp = true;
continue;
}
if (str[i+1] === '*') {
str[i] = '';
mode.blockComment = true;
continue;
}
if (str[i+1] === '/') {
str[i] = '';
mode.lineComment = true;
continue;
}
mode.regex = true;

}

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