File: ux.js

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/*
 * ux.js
 *
 * FileTea, low-friction file sharing <http://filetea.net>
 *
 * Copyright (C) 2011, Igalia S.L.
 *
 * Authors:
 *   Eduardo Lima Mitev <elima@igalia.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * version 3, or (at your option) any later version as published by
 * the Free Software Foundation.
 *
 * This library 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
 * Affero General Public License at http://www.gnu.org/licenses/agpl.html
 * for more details.
 */

// UxManager
var UxManager = new Evd.Constructor ();
UxManager.prototype = new Evd.Object ();

Evd.Object.extend (UxManager.prototype, {

    _init: function (args) {
        var self = this;

        this._baseTitle = document.title;

        this._content = args.contentManager;
        this._transfers = args.transferManager;

        this._highlights = {};

        this._content.addEventListener ("add",
            function (id, name, content, index) {
                self._addContent (id, name, content, index);
            });
        this._content.addEventListener ("show",
            function (id, name) {
                document.title = name + " - " + self._baseTitle;
                self.setHighlight (id, false);
            });
        this._content.addEventListener ("loading",
            function (id) {
                self._loading (id);
            });

        this._content.addEventListener ("not-found",
            function (id) {
                self._openDownloadView (id);
            });

        // confirm before navigating away from page
        window.onbeforeunload = function () {
            if (self._sharedFilesView.isEmpty ())
                return null;

            $("#dialog-confirm-close").dialog ({
                width: 640,
                height: 220,
                modal: true,
                position: "top",
                hide: "blind"
            });
            setTimeout (function () {
                            $( "#dialog-confirm-close" ).dialog("close");
                        }, 1);

            return "If you navigate away from this page, shared files will be removed and any active transfer will be interrupted. Are you sure?";
        };

        // shared-files view
        require (["sharedFilesView.js"],
            function (SharedFilesView) {
                self._sharedFilesView = new SharedFilesView ({
                    parentElement: $ ("#shared-files-list").get(0),
                    fileSources: Ft.files
                });

                self._sharedFilesView.addEventListener ("item-added",
                    function () {
                        self._content.open ("shared-files");
                    });
            });

        // transfers view
        require (["transfersView.js"],
            function (TransfersView) {
                self._transfersView = new TransfersView ({
                    parentElement: $ ("#transfers").get(0),
                    transferManager: Ft.transfers
                });

                self._transfersView.addEventListener ("have-updates",
                     function () {
                         if (self._content.getCurrent () != "transfers")
                             self.setHighlight ("transfers", true);
                     });
            });

        self._tabs = $ ("#tabs");

        self._tabs.tabs ({
            tabTemplate: "<li id='#{href}-menu-item'><a href='#{href}'>#{label}</a><span class='ui-icon ui-icon-close'>Remove Tab</span></li>",
            remove: function (event, ui) {
                self._content.invalidate (ui.panel.id);
            },
            beforeActivate: function (event, ui) {
                window.location.hash = ui.newPanel[0].id;
            }
        });

        self._content.start ();

        setTimeout (function () {
            $ ("#content").get (0).style.display = "block";
            self._fireEvent ("ready", []);
        }, 1);
    },

    _addContent: function (id, name, content, index) {
        var self = this;

        function getTab (id, name, index) {
            var div = document.getElementById (id);
            if (! div) {
                div = document.createElement ("div");
                div.id = id;
                document.getElementById ("tabs").appendChild (div);
                var closeButton = $ ("<span class='ui-icon ui-icon-close'>Remove Tab</span>");
                closeButton.on ("click", function (event, ui) {
                    var tab = $ (this).parent ().remove();
                    var panelId = tab.attr( "aria-controls" );
                    $( "#" + panelId ).remove();
                    self._tabs.tabs ("refresh");
                });

                $ ("<li>").append($ ("<a>", {href: "#" + id}).html(name))
                    .append(closeButton)
                    .appendTo($ ("#tabs .ui-tabs-nav"));
                self._tabs.tabs("refresh");
            }

            return div;
        }

        var div = getTab (id, name, index);
        div.innerHTML = content;
    },

    _loading: function (id) {
        var div = document.getElementById (id);
        if (div) {
            var index = $('#tabs a[href="#' + id + '"]').parent().index();
            this._tabs.tabs ("option", "active", index);
            div.innerHTML = '<div id="content-loading"></div>';
        }
    },

    _openDownloadView: function (id) {
        var view = null;

        this._addContent (id, "Download");
        this._loading (id);
        var index = $('#tabs a[href="#' + id + '"]').parent().index();
        this._tabs.tabs('option', 'active', index);

        var el = $ ("#" + id).get(0);

        var self = this;

        require (["./downloadView.js"],
            function (DownloadView) {
                view = new DownloadView ({
                    parentElement: el
                });

                view.openFile (id,
                    function (result, error) {
                        self._content.add (id,
                                           "Download",
                                           null,
                                           el.innerHTML,
                                          self._content.Mode.VOLATILE);
                    });
            });
    },

    setHighlight: function (tabId, enabled) {
        var el = $ ("#" + tabId + "-menu-item");

        if (enabled) {
            if (this._highlights[tabId])
                return;
            else {
                this._highlights[tabId] =
                    window.setInterval (function () {
                        if (el.hasClass ("highlight"))
                            el.removeClass ("highlight");
                        else
                            el.addClass ("highlight");
                    }, 500);
            }
        }
        else {
            el.removeClass ("highlight");

            if (this._highlights[tabId]) {
                window.clearInterval (this._highlights[tabId]);
                delete (this._highlights[tabId]);
            }
        }
    }
});