file-manager.js
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/*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;
};