First versionHEADmaster

1 files changed, 142 insertions, 0 deletions

diff --git a/point/libs/require-css/normalize.js b/point/libs/require-css/normalize.js
new file mode 100644
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+++ b/point/libs/require-css/normalize.js
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+//>>excludeStart('excludeRequireCss', pragmas.excludeRequireCss)
+/*
+ * css.normalize.js
+ *
+ * CSS Normalization
+ *
+ * CSS paths are normalized based on an optional basePath and the RequireJS config
+ *
+ * Usage:
+ *   normalize(css, fromBasePath, toBasePath);
+ *
+ * css: the stylesheet content to normalize
+ * fromBasePath: the absolute base path of the css relative to any root (but without ../ backtracking)
+ * toBasePath: the absolute new base path of the css relative to the same root
+ * 
+ * Absolute dependencies are left untouched.
+ *
+ * Urls in the CSS are picked up by regular expressions.
+ * These will catch all statements of the form:
+ *
+ * url(*)
+ * url('*')
+ * url("*")
+ * 
+ * @import '*'
+ * @import "*"
+ *
+ * (and so also @import url(*) variations)
+ *
+ * For urls needing normalization
+ *
+ */
+
+define(function () {
+
+        // regular expression for removing double slashes
+        // eg http://www.example.com//my///url/here -> http://www.example.com/my/url/here
+        var slashes = /([^:])\/+/g
+        var removeDoubleSlashes = function (uri) {
+                return uri.replace(slashes, '$1/');
+        }
+
+        // given a relative URI, and two absolute base URIs, convert it from one base to another
+        var protocolRegEx = /[^\:\/]*:\/\/([^\/])*/;
+        var absUrlRegEx = /^(\/|data:)/;
+
+        function convertURIBase(uri, fromBase, toBase) {
+                if (uri.match(absUrlRegEx) || uri.match(protocolRegEx))
+                        return uri;
+                uri = removeDoubleSlashes(uri);
+                // if toBase specifies a protocol path, ensure this is the same protocol as fromBase, if not
+                // use absolute path at fromBase
+                var toBaseProtocol = toBase.match(protocolRegEx);
+                var fromBaseProtocol = fromBase.match(protocolRegEx);
+                if (fromBaseProtocol && (!toBaseProtocol || toBaseProtocol[1] != fromBaseProtocol[1] || toBaseProtocol[2] != fromBaseProtocol[2]))
+                        return absoluteURI(uri, fromBase);
+
+                else {
+                        return relativeURI(absoluteURI(uri, fromBase), toBase);
+                }
+        };
+
+        // given a relative URI, calculate the absolute URI
+        function absoluteURI(uri, base) {
+                if (uri.substr(0, 2) == './')
+                        uri = uri.substr(2);
+
+                // absolute urls are left in tact
+                if (uri.match(absUrlRegEx) || uri.match(protocolRegEx))
+                        return uri;
+
+                var baseParts = base.split('/');
+                var uriParts = uri.split('/');
+
+                baseParts.pop();
+
+                while (curPart = uriParts.shift())
+                        if (curPart == '..')
+                                baseParts.pop();
+                        else
+                                baseParts.push(curPart);
+
+                return baseParts.join('/');
+        };
+
+
+        // given an absolute URI, calculate the relative URI
+        function relativeURI(uri, base) {
+
+                // reduce base and uri strings to just their difference string
+                var baseParts = base.split('/');
+                baseParts.pop();
+                base = baseParts.join('/') + '/';
+                i = 0;
+                while (base.substr(i, 1) == uri.substr(i, 1))
+                        i++;
+                while (base.substr(i, 1) != '/')
+                        i--;
+                base = base.substr(i + 1);
+                uri = uri.substr(i + 1);
+
+                // each base folder difference is thus a backtrack
+                baseParts = base.split('/');
+                var uriParts = uri.split('/');
+                out = '';
+                while (baseParts.shift())
+                        out += '../';
+
+                // finally add uri parts
+                while (curPart = uriParts.shift())
+                        out += curPart + '/';
+
+                return out.substr(0, out.length - 1);
+        };
+
+        var normalizeCSS = function (source, fromBase, toBase) {
+
+                fromBase = removeDoubleSlashes(fromBase);
+                toBase = removeDoubleSlashes(toBase);
+
+                var urlRegEx = /@import\s*("([^"]*)"|'([^']*)')|url\s*\(\s*(\s*"([^"]*)"|'([^']*)'|[^\)]*\s*)\s*\)/ig;
+                var result, url, source;
+
+                while (result = urlRegEx.exec(source)) {
+                        url = result[3] || result[2] || result[5] || result[6] || result[4];
+                        var newUrl;
+                        newUrl = convertURIBase(url, fromBase, toBase);
+                        var quoteLen = result[5] || result[6] ? 1 : 0;
+                        source = source.substr(0, urlRegEx.lastIndex - url.length - quoteLen - 1) + newUrl + source.substr(urlRegEx.lastIndex - quoteLen - 1);
+                        urlRegEx.lastIndex = urlRegEx.lastIndex + (newUrl.length - url.length);
+                }
+
+                return source;
+        };
+
+        normalizeCSS.convertURIBase = convertURIBase;
+        normalizeCSS.absoluteURI = absoluteURI;
+        normalizeCSS.relativeURI = relativeURI;
+
+        return normalizeCSS;
+});
+//>>excludeEnd('excludeRequireCss')