08-27-周三_17-09-29

node_modules/less/lib/less-browser/cache.js

@@ -0,0 +1,35 @@
+// Cache system is a bit outdated and could do with work
+
+module.exports = function(window, options, logger) {
+    var cache = null;
+    if (options.env !== 'development') {
+        try {
+            cache = (typeof window.localStorage === 'undefined') ? null : window.localStorage;
+        } catch (_) {}
+    }
+    return {
+        setCSS: function(path, lastModified, styles) {
+            if (cache) {
+                logger.info('saving ' + path + ' to cache.');
+                try {
+                    cache.setItem(path, styles);
+                    cache.setItem(path + ':timestamp', lastModified);
+                } catch(e) {
+                    //TODO - could do with adding more robust error handling
+                    logger.error('failed to save "' + path + '" to local storage for caching.');
+                }
+            }
+        },
+        getCSS: function(path, webInfo) {
+            var css       = cache && cache.getItem(path),
+                timestamp = cache && cache.getItem(path + ':timestamp');
+
+            if (timestamp && webInfo.lastModified &&
+                (new Date(webInfo.lastModified).valueOf() ===
+                    new Date(timestamp).valueOf())) {
+                // Use local copy
+                return css;
+            }
+        }
+    };
+};