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/**
 * @author Dongsheng Cai <dongsheng@moodle.com>
 */

// No need to require lang packs in moodle plugins.

var ed, url;

if (url = tinyMCEPopup.getParam("media_external_list_url")) {
    document.write('<script language="javascript" type="text/javascript" src="' + tinyMCEPopup.editor.documentBaseURI.toAbsolute(url) + '"></script>');
}

function init() {
    ed = tinyMCEPopup.editor;
    document.getElementById('filebrowsercontainer').innerHTML = getFileBrowserHTML('filebrowser','src','media','media');
}

function insertMedia() {
    var f = document.forms[0];
    var url = f.filename.value;
    var linkname = url.substring(url.lastIndexOf('/')+1);
    var h = '<a href="'+f.src.value+'">'+linkname+'</a>';
    ed.execCommand('mceInsertContent', false, h);
    tinyMCEPopup.close();
}

function serializeParameters() {
    var d = document, s = '';
    s += getStr(null, 'src');

// delete the tail comma
    s = s.length > 0 ? s.substring(0, s.length - 1) : s;

return s;
}

function getStr(p, n, d) {
    var e = document.forms[0].elements[(p != null ? p + "_" : "") + n];
    var v = e.type == "hidden" ? e.value : e.options[e.selectedIndex].value;

if (n == 'src')
            v = tinyMCEPopup.editor.convertURL(v, 'src', null);

return ((n == d || v == '') ? '' : n + ":'" + jsEncode(v) + "',");
}

function jsEncode(s) {
    s = s.replace(new RegExp('\\\\', 'g'), '\\\\');
    s = s.replace(new RegExp('"', 'g'), '\\"');
    s = s.replace(new RegExp("'", 'g'), "\\'");

return s;
}

function generatePreview(c) {
    var f = document.forms[0], p = document.getElementById('prev');

p.innerHTML = '';
    var re = new RegExp("(.+)\#(.+)", "i");
    var result = f.src.value.match(re);
    if (result) {
        f.src.value = result[1];
        f.filename.value = result[2];
    } else {
        f.src.value = f.src.value;
        f.filename.value = f.src.value;
    }

// After constrain
    var pl = serializeParameters();
    if (pl == '') {
            p.innerHTML = '';
            return;
    }
    pl = tinyMCEPopup.editor.plugins.moodlemedia._parse(pl);

if (!pl.src) {
            p.innerHTML = '';
            return;
    }

pl.src = tinyMCEPopup.editor.documentBaseURI.toAbsolute(pl.src);

// NOTE: Do not try to prevent https security popups here - users would get them later on real page anyway!

// We can not include URL directly in parameters because some security filters might block it.
    p.innerHTML = '<iframe src="' + tinyMCEPopup.editor.getParam("moodle_plugin_base") + 'moodlemedia/preview.php'
        + '?media=' + encodeURIComponent(encode64(pl.src.toString()))
        + '&sesskey=' + encodeURIComponent(parent.M.cfg.sesskey)
        + '" width="100%" height="100%"></iframe>';
}

function encode64(input) {
    /*
      CryptoMX Tools
      Copyright (C) 2004 - 2006 Derek Buitenhuis

This program is free software; you can redistribute it and/or
      modify it under the terms of the GNU General Public License
      as published by the Free Software Foundation; either version 2
      of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.

You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
   */
    var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    var output = "";
    var chr1, chr2, chr3 = "";
    var enc1, enc2, enc3, enc4 = "";
    var i = 0;

do {
        chr1 = input.charCodeAt(i++);
        chr2 = input.charCodeAt(i++);
        chr3 = input.charCodeAt(i++);

enc1 = chr1 >> 2;
        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
        enc4 = chr3 & 63;

if (isNaN(chr2)) {
            enc3 = enc4 = 64;
        } else if (isNaN(chr3)) {
            enc4 = 64;
        }

output = output +
            keyStr.charAt(enc1) +
            keyStr.charAt(enc2) +
            keyStr.charAt(enc3) +
            keyStr.charAt(enc4);
        chr1 = chr2 = chr3 = "";
        enc1 = enc2 = enc3 = enc4 = "";
    } while (i < input.length);

return output;
}

tinyMCEPopup.onInit.add(init);