08-27-周三_17-09-29

node_modules/less/lib/less-browser/file-manager.js

@@ -0,0 +1,119 @@
+/*global window, XMLHttpRequest */
+
+module.exports = function(options, logger) {
+
+    var AbstractFileManager = require("../less/environment/abstract-file-manager.js");
+
+    var fileCache = {};
+
+    //TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load
+
+    function getXMLHttpRequest() {
+        if (window.XMLHttpRequest && (window.location.protocol !== "file:" || !("ActiveXObject" in window))) {
+            return new XMLHttpRequest();
+        } else {
+            try {
+                /*global ActiveXObject */
+                return new ActiveXObject("Microsoft.XMLHTTP");
+            } catch (e) {
+                logger.error("browser doesn't support AJAX.");
+                return null;
+            }
+        }
+    }
+
+    var FileManager = function() {
+    };
+
+    FileManager.prototype = new AbstractFileManager();
+
+    FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() {
+        return true;
+    };
+    FileManager.prototype.join = function join(basePath, laterPath) {
+        if (!basePath) {
+            return laterPath;
+        }
+        return this.extractUrlParts(laterPath, basePath).path;
+    };
+    FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) {
+
+        var xhr = getXMLHttpRequest();
+        var async = options.isFileProtocol ? options.fileAsync : options.async;
+
+        if (typeof xhr.overrideMimeType === 'function') {
+            xhr.overrideMimeType('text/css');
+        }
+        logger.debug("XHR: Getting '" + url + "'");
+        xhr.open('GET', url, async);
+        xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');
+        xhr.send(null);
+
+        function handleResponse(xhr, callback, errback) {
+            if (xhr.status >= 200 && xhr.status < 300) {
+                callback(xhr.responseText,
+                    xhr.getResponseHeader("Last-Modified"));
+            } else if (typeof errback === 'function') {
+                errback(xhr.status, url);
+            }
+        }
+
+        if (options.isFileProtocol && !options.fileAsync) {
+            if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {
+                callback(xhr.responseText);
+            } else {
+                errback(xhr.status, url);
+            }
+        } else if (async) {
+            xhr.onreadystatechange = function () {
+                if (xhr.readyState == 4) {
+                    handleResponse(xhr, callback, errback);
+                }
+            };
+        } else {
+            handleResponse(xhr, callback, errback);
+        }
+    };
+    FileManager.prototype.supports = function(filename, currentDirectory, options, environment) {
+        return true;
+    };
+
+    FileManager.prototype.clearFileCache = function() {
+        fileCache = {};
+    };
+
+    FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment, callback) {
+        if (currentDirectory && !this.isPathAbsolute(filename)) {
+            filename = currentDirectory + filename;
+        }
+
+        options = options || {};
+
+        // sheet may be set to the stylesheet for the initial load or a collection of properties including
+        // some context variables for imports
+        var hrefParts = this.extractUrlParts(filename, window.location.href);
+        var href      = hrefParts.url;
+
+        if (options.useFileCache && fileCache[href]) {
+            try {
+                var lessText = fileCache[href];
+                callback(null, { contents: lessText, filename: href, webInfo: { lastModified: new Date() }});
+            } catch (e) {
+                callback({filename: href, message: "Error loading file " + href + " error was " + e.message});
+            }
+            return;
+        }
+
+        this.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {
+            // per file cache
+            fileCache[href] = data;
+
+            // Use remote copy (re-parse)
+            callback(null, { contents: data, filename: href, webInfo: { lastModified: lastModified }});
+        }, function doXHRError(status, url) {
+            callback({ type: 'File', message: "'" + url + "' wasn't found (" + status + ")", href: href });
+        });
+    };
+
+    return FileManager;
+};