文件.Basename.js（来自JSAN）

Posted 2021-02-26

File.Basename - A library that provides unix-like tools 'dirname' and 'basename'

/*
 Author:     Lee Carmichael [email protected]
 Copyright: Copyright (c) 2005 Lee Carmichael. All rights reserved.
 License:   Artistic License
 Source:    http://www.openjsan.org
 
 Description: 
 
    File.Basename - A library that provides unix-like tools 'dirname' and 'basename'
    (Grabbed from JSAN, modified syntax.)
 
 Example:
 
   File.basename('/javascripts/bin.js',2) // => bin.js
   File.dirname('/javascripts/bin.js',2) // => /javascripts
   File.path('/javascripts/bin.js',1) // => /javascripts/bin.js
   File.platform('/javascripts/bin.js',2) // => 2
   File.platformString('/javascripts/bin.js',2) // => Macintosh
   File.platformString('/javascripts/bin.js',1) // => Windows
   File.platformString('/javascripts/bin.js',2) // => Macintosh
   File.platformString('/javascripts/bin.js',3) // => UNIX
   File.platformString('/javascripts/bin.js',4) // => undefined
 
*/
 
var File = (function() {
    var TEMP = {};
    // it would be nice to turn this into a class
    function _chop(str) {
        // if not defined return empty string
        if (!str)
        return "";
 
        // remove last character from string
        return str.substr(0, (str.length - 1));
    }
    var File = {
        CONSTANTS: {
            WIN: 1,
            MAC: 2,
            UNIX: 3,
            platformStrs: new Array("N/A", "Windows", "Macintosh", "UNIX")
        },
 
        analyze_path: function(path, platform) {
            // should we error here? or just return?
            if (!path) return;
            // setup the path
            TEMP._path = path;
            // need to check this value
            // grab passed platform
            if (platform) TEMP._platform = platform;
            // figure out client type
            if (typeof(TEMP._platform) == "undefined") {
                // need to check for navigator and platform
                // just in case if not in browser env...
                if (navigator.platform.indexOf("Win") >= 0) {
                    TEMP._platform = File.CONSTANTS.WIN;
                } else if (navigator.platform.indexOf("Mac") >= 0) {
                    TEMP._platform = File.CONSTANTS.MAC;
                } else {
                    TEMP._platform = File.CONSTANTS.UNIX;
                }
            };
            // set path pattern (current for Win we leave the <Drive Letter>)
            if (TEMP._platform == File.CONSTANTS.WIN)
            TEMP._pattern = /^(.*\)?(.*)/;
            // this will not match drive letter...
            else
            TEMP._pattern = /^(.*/)?(.*)/;
 
            // match string
            var rc = TEMP._path.match(TEMP._pattern);
 
            // should we check values here?
            // * skip rc[0] since it returns our string *
            // setup basename
            TEMP._basename = rc[2];
 
            if (!TEMP._basename) TEMP._basename = "";
 
            // setup dirname
            // and remove trailing slash
            TEMP._dirname = _chop(rc[1]);
 
            return {
                basename: TEMP._basename,
                dirname: TEMP._dirname,
                path: TEMP._path,
                platform: TEMP._platform,
                platformString: File.CONSTANTS.platformStrs[TEMP._platform]
            };
        },
        basename: function(path, platform) {
            return File.analyze_path(path, platform).basename
        },
        dirname: function(path, platform) {
            return File.analyze_path(path, platform).dirname
        },
        path: function(path, platform) {
            return File.analyze_path(path, platform).path
        },
        platform: function(path, platform) {
            return File.analyze_path(path, platform).platform
        },
        platformString: function(path, platform) {
            return File.analyze_path(path, platform).platformString
        }
 
 
    }
    return File;
})()
// File.Basename -