Proyectos de Subversion Moodle

// This file is part of Moodle - http://moodle.org/

//

// Moodle 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 3 of the License, or

// (at your option) any later version.

//

// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 *

 * File Manager UI

 * =====

 * this.api, stores the URL to make ajax request

 * this.currentpath

 * this.filepicker_options

 * this.movefile_dialog

 * this.mkdir_dialog

 * this.rename_dialog

 * this.client_id

 * this.filecount, how many files in this filemanager

 * this.maxfiles

 * this.maxbytes

 * this.areamaxbytes, the maximum size of the area

 * this.filemanager, contains reference to filemanager Node

 * this.selectnode, contains referenct to select-file Node

 * this.selectui, M.core.dialogue to select the file

 * this.viewmode, contains current view mode - icons, tree or details

 *

 * FileManager options:

 * =====

 * this.options.currentpath

 * this.options.itemid

 */

/* eslint camelcase: off */

M.form_filemanager = {

    templates: {},

    formChangeChecker: null,

};

require(['core_form/changechecker'], function(FormChangeChecker) {

    // This is a nasty, hacky, way of doing it but it's the smallest evil.

    M.form_filemanager.formChangeChecker = FormChangeChecker;

});

M.form_filemanager.set_templates = function(Y, templates) {

    M.form_filemanager.templates = templates;

};

/**

 * This fucntion is called for each file picker on page.

 */

M.form_filemanager.init = function(Y, options) {

    var FileManagerHelper = function(options) {

        FileManagerHelper.superclass.constructor.apply(this, arguments);

    };

    FileManagerHelper.NAME = "FileManager";

    FileManagerHelper.ATTRS = {

        options: {},

        lang: {}

    };

    Y.extend(FileManagerHelper, Y.Base, {

        api: M.cfg.wwwroot+'/repository/draftfiles_ajax.php',

        menus: {},

        initializer: function(options) {

            this.options = options;

            if (options.mainfile) {

                this.enablemainfile = options.mainfile;

            }

            this.client_id = options.client_id;

            this.currentpath = '/';

            this.maxfiles = options.maxfiles;

            this.maxbytes = options.maxbytes;

            this.areamaxbytes = options.areamaxbytes;

            this.userprefs = options.userprefs;

            this.emptycallback = null; // Used by drag and drop upload

            this.filepicker_options = options.filepicker?options.filepicker:{};

            this.filepicker_options.client_id = this.client_id;

            this.filepicker_options.context = options.context;

            this.filepicker_options.maxfiles = this.maxfiles;

            this.filepicker_options.maxbytes = this.maxbytes;

            this.filepicker_options.areamaxbytes = this.areamaxbytes;

            this.filepicker_options.env = 'filemanager';

            this.filepicker_options.itemid = options.itemid;

            if (options.filecount) {

                this.filecount = options.filecount;

            } else {

                this.filecount = 0;

            }

            // prepare filemanager for drag-and-drop upload

            this.filemanager = Y.one('#filemanager-'+options.client_id);

            if (this.filemanager.hasClass('filemanager-container') || !this.filemanager.one('.filemanager-container')) {

                this.dndcontainer = this.filemanager;

            } else  {

                this.dndcontainer = this.filemanager.one('.filemanager-container');

                if (!this.dndcontainer.get('id')) {

                    this.dndcontainer.generateID();

                }

            }

            // save template for one path element and location of path bar

            if (this.filemanager.one('.fp-path-folder')) {

                this.pathnode = this.filemanager.one('.fp-path-folder');

                this.pathbar = this.pathnode.get('parentNode');

                this.pathbar.removeChild(this.pathnode);

            }

            // initialize 'select file' panel

            this.selectnode = Y.Node.create(M.form_filemanager.templates.fileselectlayout);

            this.selectnode.setAttribute('aria-live', 'assertive');

            this.selectnode.setAttribute('role', 'dialog');

            this.selectnode.generateID();

            var labelid = 'fm-dialog-label_'+ this.selectnode.get('id');

            this.selectui = new M.core.dialogue({

                draggable    : true,

                headerContent: '<h3 id="' + labelid +'">' + M.util.get_string('edit', 'moodle') + '</h3>',

                bodyContent  : this.selectnode,

                centered     : true,

                width        : '480px',

                modal        : true,

                visible      : false

            });

            Y.one('#'+this.selectnode.get('id')).setAttribute('aria-labelledby', labelid);

            this.selectui.hide();

            this.setup_select_file();

            // setup buttons onclick events

            this.setup_buttons();

            // set event handler for lazy loading of thumbnails

            this.filemanager.one('.fp-content').on(['scroll','resize'], this.content_scrolled, this);

            // display files

            this.viewmode = this.get_preference("recentviewmode");

            if (this.viewmode != 2 && this.viewmode != 3) {

                this.viewmode = 1;

            }

            var viewmodeselectors = {'1': '.fp-vb-icons', '2': '.fp-vb-tree', '3': '.fp-vb-details'};

            this.filemanager.all('.fp-vb-icons,.fp-vb-tree,.fp-vb-details').removeClass('checked');

            this.filemanager.all(viewmodeselectors[this.viewmode]).addClass('checked');

            this.refresh(this.currentpath); // MDL-31113 get latest list from server

        },

        wait: function() {

           this.filemanager.addClass('fm-updating');

        },

        request: function(args, redraw) {

            var api = this.api + '?action='+args.action;

            var params = {};

            var scope = this;

            if (args['scope']) {

                scope = args['scope'];

            }

            params['sesskey'] = M.cfg.sesskey;

            params['client_id'] = this.client_id;

            params['filepath'] = this.currentpath;

            params['itemid'] = this.options.itemid?this.options.itemid:0;

            if (args['params']) {

                for (i in args['params']) {

                    params[i] = args['params'][i];

                }

            }

            var cfg = {

                method: 'POST',

                on: {

                    complete: function(id,o,p) {

                        if (!o) {

                            alert('IO FATAL');

                            return;

                        }

                        var data = null;

                        try {

                            data = Y.JSON.parse(o.responseText);

                        } catch(e) {

                            scope.print_msg(M.util.get_string('invalidjson', 'repository'), 'error');

                            Y.error(M.util.get_string('invalidjson', 'repository')+":\n"+o.responseText);

                            return;

                        }

                        if (data && data.tree && scope.set_current_tree) {

                            scope.set_current_tree(data.tree);

                        }

                        args.callback(id,data,p);

                    }

                },

                arguments: {

                    scope: scope

                },

                headers: {

                    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'

                },

                data: build_querystring(params)

            };

            if (args.form) {

                cfg.form = args.form;

            }

            Y.io(api, cfg);

            if (redraw) {

                this.wait();

            }

        },

        filepicker_callback: function(obj) {

            this.filecount++;

            this.check_buttons();

            this.refresh(this.currentpath);

            M.form_filemanager.formChangeChecker.markFormChangedFromNode(this.filemanager.getDOMNode());

            require(['core_form/events'], function(FormEvent) {

                FormEvent.notifyUploadChanged(this.filemanager.get('id'));

            }.bind(this));

        },

        check_buttons: function() {

            if (this.filecount>0) {

                this.filemanager.removeClass('fm-nofiles');

            } else {

                this.filemanager.addClass('fm-nofiles');

            }

            if (this.filecount >= this.maxfiles && this.maxfiles!=-1) {

                this.filemanager.addClass('fm-maxfiles');

            }

            else {

                this.filemanager.removeClass('fm-maxfiles');

            }

        },

        refresh: function(filepath, action) {

            var scope = this;

            this.currentpath = filepath;

            if (!filepath) {

                filepath = this.currentpath;

            } else {

                this.currentpath = filepath;

            }

            this.request({

                action: 'list',

                scope: scope,

                params: {'filepath':filepath},

                callback: function(id, obj, args) {

                    scope.filecount = obj.filecount;

                    scope.options = obj;

                    scope.lazyloading = {};

                    scope.check_buttons();

                    scope.render(obj, action);

                }

            }, true);

        },

        /** displays message in a popup */

        print_msg: function(msg, type, options) {

            var header = M.util.get_string('error', 'moodle');

            if (type != 'error') {

                type = 'info'; // one of only two types excepted

                header = M.util.get_string('info', 'moodle');

            }

            if (!this.msg_dlg) {

                this.msg_dlg_node = Y.Node.create(M.form_filemanager.templates.message);

                var nodeid = this.msg_dlg_node.generateID();

                var previousActiveElement = null;

                if (typeof options.previousActiveElement != 'undefined') {

                    previousActiveElement = options.previousActiveElement;

                }

                this.msg_dlg = new M.core.dialogue({

                    draggable    : true,

                    bodyContent  : this.msg_dlg_node,

                    centered     : true,

                    modal        : true,

                    visible      : false,

                    focusAfterHide: previousActiveElement,

                });

                this.msg_dlg_node.one('.fp-msg-butok').on('click', function(e) {

                    e.preventDefault();

                    this.msg_dlg.hide();

                }, this);

            }

            this.msg_dlg.set('headerContent', header);

            this.msg_dlg_node.removeClass('fp-msg-info').removeClass('fp-msg-error').addClass('fp-msg-'+type)

            this.msg_dlg_node.one('.fp-msg-text').setContent(Y.Escape.html(msg));

            this.msg_dlg.show();

        },

        is_disabled: function() {

            return this.filemanager.ancestor('.fitem.disabled') != null;

        },

        getSelectedFiles: function() {

            var markedFiles = this.filemanager.all('[data-togglegroup][data-toggle=slave]:checked');

            var filenames = [];

            markedFiles.each(function(item) {

                var fileinfo = this.options.list.find(function(element) {

                    return item.getData().fullname == element.fullname;

                });

                if (fileinfo && fileinfo != undefined) {

                    filenames.push({

                        filepath: fileinfo.filepath,

                        filename: fileinfo.filename

                    });

                }

            }, this);

            return filenames;

        },

        setup_buttons: function() {

            var button_download = this.filemanager.one('.fp-btn-download');

            var button_create   = this.filemanager.one('.fp-btn-mkdir');

            var button_addfile  = this.filemanager.one('.fp-btn-add');

            var buttonDeleteFile = this.filemanager.one('.fp-btn-delete');

            // setup 'add file' button

            button_addfile.on('click', this.show_filepicker, this);

            var dndarrow = this.filemanager.one('.dndupload-arrow');

            if (dndarrow) {

                dndarrow.on('click', this.show_filepicker, this);

            }

            // setup 'make a folder' button

            if (this.options.subdirs) {

                button_create.on('click',function(e) {

                    e.preventDefault();

                    if (this.is_disabled()) {

                        return;

                    }

                    var scope = this;

                    // a function used to perform an ajax request

                    var perform_action = function(e) {

                        e.preventDefault();

                        var foldername = Y.one('#fm-newname-'+scope.client_id).get('value');

                        if (!foldername) {

                            scope.mkdir_dialog.hide();

                            return;

                        }

                        scope.request({

                            action:'mkdir',

                            params: {filepath:scope.currentpath, newdirname:foldername},

                            callback: function(id, obj, args) {

                                var filepath = obj.filepath;

                                scope.mkdir_dialog.hide();

                                scope.refresh(filepath);

                                Y.one('#fm-newname-'+scope.client_id).set('value', '');

                                M.form_filemanager.formChangeChecker.markFormChangedFromNode(scope.filemanager.getDOMNode());

                            }

                        });

                    };

                    var validate_folder_name = function() {

                        var valid = false;

                        var foldername = Y.one('#fm-newname-'+scope.client_id).get('value');

                        if (foldername.length > 0) {

                            valid = true;

                        }

                        var btn = Y.one('#fm-mkdir-butcreate-'+scope.client_id);

                        if (btn) {

                            btn.set('disabled', !valid);

                        }

                        return valid;

                    };

                    if (!this.mkdir_dialog) {

                        var node = Y.Node.create(M.form_filemanager.templates.mkdir);

                        this.mkdir_dialog = new M.core.dialogue({

                            draggable    : true,

                            bodyContent  : node,

                            centered     : true,

                            modal        : true,

                            visible      : false,

                            focusAfterHide: e.target.ancestor('a', true),

                        });

                        node.one('.fp-dlg-butcreate').set('id', 'fm-mkdir-butcreate-'+this.client_id).on('click',

                                perform_action, this);

                        node.one('input').set('id', 'fm-newname-'+this.client_id).on('keydown', function(e) {

                            var valid = Y.bind(validate_folder_name, this)();

                            if (valid && e.keyCode === 13) {

                                Y.bind(perform_action, this)(e);

                            }

                        }, this);

                        node.one('#fm-newname-'+this.client_id).on(['keyup', 'change'], function(e) {

                            Y.bind(validate_folder_name, this)();

                        }, this);

                        node.one('label').set('for', 'fm-newname-' + this.client_id);

                        node.all('.fp-dlg-butcancel').on('click', function(e){e.preventDefault();this.mkdir_dialog.hide();}, this);

                        node.all('.fp-dlg-curpath').set('id', 'fm-curpath-'+this.client_id);

                    }

                    this.mkdir_dialog.show();

                    // Default folder name:

                    var foldername = M.util.get_string('newfolder', 'repository');

                    while (this.has_folder(foldername)) {

                        foldername = increment_filename(foldername, true);

                    }

                    Y.one('#fm-newname-'+scope.client_id).set('value', foldername);

                    Y.bind(validate_folder_name, this)();

                    Y.one('#fm-newname-'+scope.client_id).focus().select();

                    Y.all('#fm-curpath-'+scope.client_id).setContent(this.currentpath);

                }, this);

            } else {

                this.filemanager.addClass('fm-nomkdir');

            }

            // setup 'download this folder' button

            button_download.on('click',function(e) {

                e.preventDefault();

                if (this.is_disabled()) {

                    return;

                }

                var scope = this;

                var image_downloading = this.filemanager.one('.fp-img-downloading');

                if (image_downloading.getStyle('display') == 'inline') {

                    return;

                }

                image_downloading.setStyle('display', 'inline');

                var filenames = this.getSelectedFiles();

                // perform downloaddir ajax request

                this.request({

                    action: 'downloadselected',

                    scope: scope,

                    params: {selected: Y.JSON.stringify(filenames)},

                    callback: function(id, obj, args) {

                        var image_downloading = scope.filemanager.one('.fp-img-downloading');

                        image_downloading.setStyle('display', 'none');

                        if (obj) {

                            scope.refresh(obj.filepath);

                            node = Y.Node.create('<iframe></iframe>').setStyles({

                                visibility : 'hidden',

                                width : '1px',

                                height : '1px'

                            });

                            node.set('src', obj.fileurl);

                            Y.one('body').appendChild(node);

                        } else {

                            scope.print_msg(M.util.get_string('draftareanofiles', 'repository'), 'error');

                        }

                    }

                });

            }, this);

            buttonDeleteFile.on('click', function(e) {

                e.preventDefault();

                var dialogOptions = {};

                var filenames = this.getSelectedFiles();

                var previousActiveElement = e.target.ancestor('a', true);

                if (!filenames.length) {

                    var options = {};

                    options.previousActiveElement = previousActiveElement;

                    this.print_msg(M.util.get_string('nofilesselected', 'repository'), 'error', options);

                    return;

                }

                dialogOptions.scope = this;

                var params = {

                    selected: Y.JSON.stringify(filenames)

                };

                dialogOptions.header = M.util.get_string('confirm', 'moodle');

                dialogOptions.message = M.util.get_string('confirmdeleteselectedfile', 'repository', filenames.length);

                dialogOptions.previousActiveElement = previousActiveElement;

                dialogOptions.callbackargs = [params];

                dialogOptions.callback = function(params) {

                    this.request({

                        action: 'deleteselected',

                        scope: this,

                        params: params,

                        callback: function(id, obj, args) {

                            // Do something here

                            args.scope.filecount -= params.length;

                            if (obj && obj.length) {

                                args.scope.refresh(obj[0], {action: 'delete'});

                            }

                            M.form_filemanager.formChangeChecker.markFormChangedFromNode(this.scope.filemanager.getDOMNode());

                            require(['core_form/events'], function(FormEvent) {

                                FormEvent.notifyUploadChanged(this.scope.filemanager.get('id'));

                            }.bind(this));

                        }

                    });

                };

                this.show_confirm_dialog(dialogOptions);

            }, this);

            this.filemanager.all('.fp-vb-icons,.fp-vb-tree,.fp-vb-details').

                on('click', function(e) {

                    e.preventDefault();

                    var viewbar = this.filemanager.one('.fp-viewbar')

                    if (!this.is_disabled() && (!viewbar || !viewbar.hasClass('disabled'))) {

                        this.filemanager.all('.fp-vb-icons,.fp-vb-tree,.fp-vb-details').removeClass('checked')

                        if (e.currentTarget.hasClass('fp-vb-tree')) {

                            this.viewmode = 2;

                        } else if (e.currentTarget.hasClass('fp-vb-details')) {

                            this.viewmode = 3;

                        } else {

                            this.viewmode = 1;

                        }

                        e.currentTarget.addClass('checked')

                        this.render();

                        this.filemanager.one('.fp-content').setAttribute('tabIndex', '0');

                        this.filemanager.one('.fp-content').focus();

                        this.set_preference('recentviewmode', this.viewmode);

                    }

                }, this);

        },

        show_filepicker: function (e) {

            // if maxfiles == -1, the no limit

            e.preventDefault();

            if (this.is_disabled()) {

                return;

            }

            var options = this.filepicker_options;

            options.formcallback = this.filepicker_callback;

            // XXX: magic here, to let filepicker use filemanager scope

            options.magicscope = this;

            options.savepath = this.currentpath;

            options.previousActiveElement = e.target.ancestor('a', true);

            M.core_filepicker.show(Y, options);

        },

        print_path: function() {

            var p = this.options.path;

            this.pathbar.setContent('').addClass('empty');

            if (p && p.length!=0 && this.viewmode != 2) {

                for(var i = 0; i < p.length; i++) {

                    var el = this.pathnode.cloneNode(true);

                    this.pathbar.appendChild(el);

                    if (i == 0) {

                        el.addClass('first');

                    }

                    if (i == p.length-1) {

                        el.addClass('last');

                    }

                    if (i%2) {

                        el.addClass('even');

                    } else {

                        el.addClass('odd');

                    }

                    el.one('.fp-path-folder-name').setContent(Y.Escape.html(p[i].name)).

                        on('click', function(e, path) {

                            e.preventDefault();

                            if (!this.is_disabled()) {

                                this.refresh(path);

                            }

                        }, this, p[i].path);

                }

                this.pathbar.removeClass('empty');

            }

        },

        get_filepath: function(obj) {

            if (obj.path && obj.path.length) {

                return obj.path[obj.path.length-1].path;

            }

            return '';

        },

        treeview_dynload: function(node, cb) {

            var retrieved_children = {};

            if (node.children) {

                for (var i in node.children) {

                    retrieved_children[node.children[i].path] = node.children[i];

                }

            }

            if (!node.path || node.path == '/') {

                // this is a root pseudo folder

                node.fileinfo.filepath = '/';

                node.fileinfo.type = 'folder';

                node.fileinfo.fullname = node.fileinfo.title;

                node.fileinfo.filename = '.';

            }

            this.request({

                action:'list',

                params: {filepath:node.path?node.path:''},

                scope:this,

                callback: function(id, obj, args) {

                    var list = obj.list;

                    var scope = args.scope;

                    // check that user did not leave the view mode before recieving this response

                    if (!(scope.viewmode == 2 && node && node.getChildrenEl())) {

                        return;

                    }

                    if (cb != null) { // (in manual mode do not update current path)

                        scope.options = obj;

                        scope.currentpath = node.path?node.path:'/';

                    }

                    node.highlight(false);

                    node.origlist = obj.list ? obj.list : null;

                    node.origpath = obj.path ? obj.path : null;

                    node.children = [];

                    for(k in list) {

                        if (list[k].type == 'folder' && retrieved_children[list[k].filepath]) {

                            // if this child is a folder and has already been retrieved

                            retrieved_children[list[k].filepath].fileinfo = list[k];

                            node.children[node.children.length] = retrieved_children[list[k].filepath];

                        } else {

                            // append new file to the list

                            scope.view_files([list[k]]);

                        }

                    }

                    if (cb == null) {

                        node.refresh();

                    } else {

                        // invoke callback requested by TreeView component

                        cb();

                    }

                    scope.content_scrolled();

                }

            }, false);

        },

        content_scrolled: function(e) {

            setTimeout(Y.bind(function() {

                if (this.processingimages) {return;}

                this.processingimages = true;

                var scope = this,

                    fpcontent = this.filemanager.one('.fp-content'),

                    fpcontenty = fpcontent.getY(),

                    fpcontentheight = fpcontent.getStylePx('height'),

                    is_node_visible = function(node) {

                        var offset = node.getY()-fpcontenty;

                        if (offset <= fpcontentheight && (offset >=0 || offset+node.getStylePx('height')>=0)) {

                            return true;

                        }

                        return false;

                    };

                // replace src for visible images that need to be lazy-loaded

                if (scope.lazyloading) {

                    fpcontent.all('img').each( function(node) {

                        if (node.get('id') && scope.lazyloading[node.get('id')] && is_node_visible(node)) {

                            node.setImgRealSrc(scope.lazyloading);

                        }

                    });

                }

                this.processingimages = false;

            }, this), 200)

        },

        view_files: function(appendfiles, actionfiles) {

            this.filemanager.removeClass('fm-updating').removeClass('fm-noitems');

            if ((appendfiles == null) && (!this.options.list || this.options.list.length == 0) && this.viewmode != 2) {

                this.filemanager.addClass('fm-noitems');

                // This is used to focus after refreshing the list files is empty by deletion file action.

                if (actionfiles !== undefined && actionfiles.action == 'delete') {

                    this.filemanager.one('.fp-btn-add a').focus();

                }

                return;

            }

            var list = (appendfiles != null) ? appendfiles : this.options.list;

            var element_template;

            if (this.viewmode == 2 || this.viewmode == 3) {

                element_template = Y.Node.create(M.form_filemanager.templates.listfilename);

            } else {

                this.viewmode = 1;

                element_template = Y.Node.create(M.form_filemanager.templates.iconfilename);

            }

            if (this.viewmode == 1 || this.viewmode == 2) {

                this.filemanager.one('.fp-btn-delete').addClass('d-none');

            } else {

                this.filemanager.one('.fp-btn-delete').removeClass('d-none');

            }

            var options = {

                viewmode : this.viewmode,

                appendonly : appendfiles != null,

                filenode : element_template,

                disablecheckboxes: false,

                callbackcontext : this,

                callback : function(e, node) {

                    if (e.preventDefault) { e.preventDefault(); }

                    if (node.type == 'folder') {

                        this.refresh(node.filepath);

                    } else {

                        // This is used to focus on file after dialogue closed.

                        var previousActiveElement = e.target.ancestor('a', true);

                        this.options.previousActiveElement = previousActiveElement;

                        this.selectui.set('focusOnPreviousTargetAfterHide', true);

                        this.selectui.set('focusAfterHide', previousActiveElement);

                        this.select_file(node);

                    }

                },

                rightclickcallback : function(e, node) {

                    if (e.preventDefault) { e.preventDefault(); }

                    this.select_file(node);

                },

                classnamecallback : function(node) {

                    var classname = '';

                    if (node.type == 'folder' || (!node.type && !node.filename)) {

                        classname = classname + ' fp-folder';

                    }

                    if (node.filename || node.filepath || (node.path && node.path != '/')) {

                        classname = classname + ' fp-hascontextmenu';

                    }

                    if (node.isref) {

                        classname = classname + ' fp-isreference';

                    }

                    if (node.refcount) {

                        classname = classname + ' fp-hasreferences';

                    }

                    if (node.originalmissing) {

                        classname = classname + ' fp-originalmissing';

                    }

                    if (node.sortorder == 1) { classname = classname + ' fp-mainfile';}

                    return Y.Lang.trim(classname);

                }

            };

            if (this.viewmode == 2) {

                options.dynload = true;

                options.filepath = this.options.path;

                options.treeview_dynload = this.treeview_dynload;

                options.norootrightclick = true;

                options.callback = function(e, node) {

                    // TODO MDL-32736 e is not an event here but an object with properties 'event' and 'node'

                    if (!node.fullname) {return;}

                    if (node.type != 'folder') {

                        if (e.node.parent && e.node.parent.origpath) {

                            // set the current path

                            this.options.path = e.node.parent.origpath;

                            this.options.list = e.node.parent.origlist;

                            this.print_path();

                        }

                        this.currentpath = node.filepath;

                        var previousActiveElement = Y.Node(e.event.target).ancestor('a', true);

                        this.options.previousActiveElement = previousActiveElement;

                        this.selectui.set('focusOnPreviousTargetAfterHide', true);

                        this.selectui.set('focusAfterHide', previousActiveElement);

                        this.select_file(node);

                    } else {

                        // save current path and filelist (in case we want to jump to other viewmode)

                        this.options.path = e.node.origpath;

                        this.options.list = e.node.origlist;

                        this.currentpath = node.filepath;

                        this.print_path();

                        //this.content_scrolled();

                    }

                };

            }

            if (!this.lazyloading) {

                this.lazyloading={};

            }

            this.filemanager.one('.fp-content').fp_display_filelist(options, list, this.lazyloading);

            this.content_scrolled();

            // This is used to focus after refreshing the list files by update file and set main file action.

            if (actionfiles !== undefined) {

                if (actionfiles.action == 'updatefile' || actionfiles.action == 'setmainfile') {

                    var fileslist = this.filemanager.one('.fp-content');

                    fileslist.all('a').each(function(parentnode) {

                        parentnode.all('.fp-filename').each(function(childnode) {

                            if (childnode.get('innerHTML') == actionfiles.newfilename) {

                                parentnode.focus();

                            }

                        });

                    });

                }

                if (actionfiles.action == 'delete') {

                    this.filemanager.one('.fp-btn-delete a').focus();

                }

            }

        },

        populateLicensesSelect: function(licensenode, filenode) {

            if (!licensenode) {

                return;

            }

            licensenode.setContent('');

            var selectedlicense = this.filepicker_options.defaultlicense;

            if (filenode) {

                // File has a license already, use it.

                selectedlicense = filenode.license;

            } else if (this.filepicker_options.rememberuserlicensepref && this.get_preference('recentlicense')) {

                // When 'Remember user licence preference' is enabled use the last license selected by the user, if any.

                selectedlicense = this.get_preference('recentlicense');

            }

            var licenses = this.filepicker_options.licenses;

            for (var i in licenses) {

                // Include the file's current license, even if not enabled, to prevent displaying

                // misleading information about which license the file currently has assigned to it.

                if (licenses[i].enabled == true || (filenode !== undefined && licenses[i].shortname === filenode.license)) {

                    var option = Y.Node.create('<option/>').

                    set('selected', (licenses[i].shortname == selectedlicense)).

                    set('value', licenses[i].shortname).

                    setContent(Y.Escape.html(licenses[i].fullname));

                    licensenode.appendChild(option);

                }

            }

        },

        set_current_tree: function(tree) {

            var appendfilepaths = function(list, node) {

                if (!node || !node.children || !node.children.length) {return;}

                for (var i in node.children) {

                    list[list.length] = node.children[i].filepath;

                    appendfilepaths(list, node.children[i]);

                }

            }

            var list = ['/'];

            appendfilepaths(list, tree);

            var selectnode = this.selectnode;

            node = selectnode.one('.fp-path select');

            node.setContent('');

            for (var i in list) {

                node.appendChild(Y.Node.create('<option/>').

                    set('value', list[i]).setContent(Y.Escape.html(list[i])));

            }

        },

        update_file: function(confirmed) {

            var selectnode = this.selectnode;

            var fileinfo = this.selectui.fileinfo;

            var newfilename = Y.Lang.trim(selectnode.one('.fp-saveas input').get('value'));

            var filenamechanged = (newfilename && newfilename != fileinfo.fullname);

            var pathselect = selectnode.one('.fp-path select'),

                    pathindex = pathselect.get('selectedIndex'),

                    targetpath = pathselect.get("options").item(pathindex).get('value');

            var filepathchanged = (targetpath != this.get_parent_folder_name(fileinfo));

            var newauthor = Y.Lang.trim(selectnode.one('.fp-author input').get('value'));

            var authorchanged = (newauthor != Y.Lang.trim(fileinfo.author));

            var licenseselect = selectnode.one('.fp-license select'),

                    licenseindex = licenseselect.get('selectedIndex'),

                    newlicense = licenseselect.get("options").item(licenseindex).get('value');

            var licensechanged = (newlicense != fileinfo.license);

            var params, action;

            var dialog_options = {callback:this.update_file, callbackargs:[true], scope:this};

            if (fileinfo.type == 'folder') {

                if (!newfilename) {

                    this.print_msg(M.util.get_string('entername', 'repository'), 'error');

                    return;

                }

                if (filenamechanged || filepathchanged) {

                    if (!confirmed) {

                        dialog_options.message = M.util.get_string('confirmrenamefolder', 'repository');

                        this.show_confirm_dialog(dialog_options);

                        this.selectui.hide();

                        return;

                    }

                    params = {filepath:fileinfo.filepath, newdirname:newfilename, newfilepath:targetpath};

                    action = 'updatedir';

                }

            } else {

                if (!newfilename) {

                    this.print_msg(M.util.get_string('enternewname', 'repository'), 'error');

                    return;

                }

                if ((filenamechanged || filepathchanged) && !confirmed) {

                    var warnings = '';

                    var originalfilenamearr = fileinfo.fullname.split('.');

                    var originalextension = (originalfilenamearr.length > 1) ? originalfilenamearr.pop() : "";

                    var newfilenamearr = newfilename.split('.');

                    var newextension = (newfilenamearr.length > 1) ? newfilenamearr.pop() : "";

                    if (newextension !== originalextension) {

                        if (newextension === "") {

                            var string = M.util.get_string('originalextensionremove', 'repository', originalextension);

                        } else {

                            var stringvars = {

                                originalextension: originalextension,

                                newextension: newextension

                            }

                            string = M.util.get_string('originalextensionchange', 'repository', stringvars);

                        }

                        warnings = warnings.concat('<li>', string, '</li>');

                    }

                    if (fileinfo.refcount) {

                        var string = M.util.get_string('aliaseschange', 'repository', fileinfo.refcount);

                        warnings = warnings.concat('<li>', string, '</li>');

                    }

                    if (warnings.length > 0) {

                        var message = '';

                        var confirmmsg = M.util.get_string('confirmrenamefile', 'repository', fileinfo.refcount);

                        dialog_options.message = message.concat('<p>', confirmmsg, '</p>',

                            '<ul class="px-5">', warnings, '</ul>');

                        this.show_confirm_dialog(dialog_options);

                        return;

                    }

                }

                if (filenamechanged || filepathchanged || licensechanged || authorchanged) {

                    params = {filepath:fileinfo.filepath, filename:fileinfo.fullname,

                        newfilename:newfilename, newfilepath:targetpath,

                        newlicense:newlicense, newauthor:newauthor};

                    action = 'updatefile';

                }

            }

            if (!action) {

                // no changes

                this.selectui.hide();

                return;

            }

            selectnode.addClass('loading');

            this.request({

                action: action,

                scope: this,

                params: params,

                callback: function(id, obj, args) {

                    if (obj.error) {

                        selectnode.removeClass('loading');

                        args.scope.print_msg(obj.error, 'error');

                    } else {

                        args.scope.selectui.hide();

                        var actionfile = {action: action, newfilename: newfilename};

                        args.scope.refresh((obj && obj.filepath) ? obj.filepath : '/', actionfile);

                        M.form_filemanager.formChangeChecker.markFormChangedFromNode(this.scope.filemanager.getDOMNode());

                    }

                }

            });

        },

        /**

         * Displays a confirmation dialog

         * Expected attributes in dialog_options: message, callback, callbackargs(optional), scope(optional)

         */

        show_confirm_dialog: function(dialogOptions) {

            require(['core/notification', 'core/str'], function(Notification, Str) {

                Notification.saveCancelPromise(

                    Str.get_string('confirm', 'moodle'),

                    dialogOptions.message,

                    Str.get_string('yes', 'moodle')

                ).then(function() {

                    dialogOptions.callback.apply(dialogOptions.scope, dialogOptions.callbackargs);

                    return;

                }).catch(function() {

                    // User cancelled.

                });

            });

        },

        setup_select_file: function() {

            var selectnode = this.selectnode;

            var scope = this;

            // bind labels with corresponding inputs

            selectnode.all('.fp-saveas,.fp-path,.fp-author,.fp-license').each(function (node) {

                node.all('label').set('for', node.one('input,select').generateID());

            });

            // register event on clicking buttons

            selectnode.one('.fp-file-update').on('click', function(e) {

                e.preventDefault();

                this.update_file();

            }, this);

            selectnode.all('form input').on('key', function(e) {

                e.preventDefault();

                scope.update_file();

            }, 'enter');

            selectnode.one('.fp-file-download').on('click', function(e) {

                e.preventDefault();

                if (this.selectui.fileinfo.type != 'folder') {

                    node = Y.Node.create('<iframe></iframe>').setStyles({

                        visibility : 'hidden',

                        width : '1px',

                        height : '1px'

                    });

                    node.set('src', this.selectui.fileinfo.url);

                    Y.one('body').appendChild(node);

                }

            }, this);

            selectnode.one('.fp-file-delete').on('click', function(e) {

                e.preventDefault();

                var dialog_options = {

                    scope: this,

                    header: M.util.get_string('confirm', 'moodle'),

                };

                var params = {};

                var fileinfo = this.selectui.fileinfo;

                params.filepath = fileinfo.filepath;

                if (fileinfo.type == 'folder') {

                    params.filename = '.';

                    dialog_options.message = M.util.get_string('confirmdeletefolder', 'repository');

                } else {

                    params.filename = fileinfo.fullname;

                    if (fileinfo.refcount) {

                        dialog_options.message = M.util.get_string('confirmdeletefilewithhref', 'repository', fileinfo.refcount);

                    } else {

                        dialog_options.message = M.util.get_string('confirmdeletefile', 'repository');

                    }

                }

                dialog_options.callbackargs = [params];

                dialog_options.callback = function(params) {

                    //selectnode.addClass('loading');

                    this.request({

                        action: 'delete',

                        scope: this,

                        params: params,

                        callback: function(id, obj, args) {

                            //args.scope.selectui.hide();

                            args.scope.filecount--;

                            args.scope.refresh(obj.filepath, {action: 'delete'});

                            M.form_filemanager.formChangeChecker.markFormChangedFromNode(this.scope.filemanager.getDOMNode());

                            require(['core_form/events'], function(FormEvent) {

                                FormEvent.notifyUploadChanged(this.scope.filemanager.get('id'));

                            }.bind(this));

                        }

                    });

                };

                this.selectui.hide(); // TODO remove this after confirm dialog is replaced with YUI3

                // This is used to focus on before active element after confirm dialogue closed.

                if (this.options.previousActiveElement !== undefined) {

                    dialog_options.previousActiveElement = this.options.previousActiveElement;

                }