keeweb/app/scripts/views/app-view.js

'use strict';

var Backbone = require('backbone'),
    DragView = require('../views/drag-view'),
    MenuView = require('../views/menu/menu-view'),
    FooterView = require('../views/footer-view'),
    ListView = require('../views/list-view'),
    DetailsView = require('../views/details/details-view'),
    OpenView = require('../views/open-view'),
    SettingsView = require('../views/settings/settings-view'),
    Alerts = require('../util/alerts'),
    Keys = require('../const/keys'),
    KeyHandler = require('../util/key-handler'),
    Launcher = require('../util/launcher');

var AppView = Backbone.View.extend({
    el: 'body',

    template: require('templates/app.html'),

    events: {
        'contextmenu': 'contextmenu',
        'drop': 'drop',
        'dragover': 'dragover',
        'click a[target=_blank]': 'extLinkClick'
    },

    views: null,

    initialize: function () {
        this.views = {};
        this.views.menu = new MenuView({ model: this.model.menu });
        this.views.menuDrag = new DragView('x');
        this.views.footer = new FooterView({ model: this.model });
        this.views.list = new ListView({ model: this.model });
        this.views.listDrag = new DragView('x');
        this.views.details = new DetailsView();
        this.views.details.appModel = this.model;

        this.views.menu.listenDrag(this.views.menuDrag);
        this.views.list.listenDrag(this.views.listDrag);

        this.listenTo(this.model.settings, 'change:theme', this.setTheme);
        this.listenTo(this.model.files, 'update reset', this.fileListUpdated);

        this.listenTo(Backbone, 'menu-select', this.menuSelect);
        this.listenTo(Backbone, 'lock-workspace', this.lockWorkspace);
        this.listenTo(Backbone, 'show-file', this.showFileSettings);
        this.listenTo(Backbone, 'open-file', this.toggleOpenFile);
        this.listenTo(Backbone, 'save-all', this.saveAll);
        this.listenTo(Backbone, 'switch-view', this.switchView);
        this.listenTo(Backbone, 'toggle-settings', this.toggleSettings);
        this.listenTo(Backbone, 'toggle-menu', this.toggleMenu);

        window.onbeforeunload = this.beforeUnload.bind(this);
        window.onresize = this.windowResize.bind(this);

        KeyHandler.onKey(Keys.DOM_VK_ESCAPE, this.escPressed, this);
        KeyHandler.onKey(Keys.DOM_VK_BACK_SPACE, this.backspacePressed, this);
    },

    render: function () {
        this.setTheme();
        this.$el.html(this.template());
        this.views.menu.setElement(this.$el.find('.app__menu')).render();
        this.views.menuDrag.setElement(this.$el.find('.app__menu-drag')).render();
        this.views.footer.setElement(this.$el.find('.app__footer')).render();
        this.views.list.setElement(this.$el.find('.app__list')).render();
        this.views.listDrag.setElement(this.$el.find('.app__list-drag')).render();
        this.views.details.setElement(this.$el.find('.app__details')).render();
        return this;
    },

    showOpenFile: function() {
        this.views.menu.hide();
        this.views.menuDrag.hide();
        this.views.list.hide();
        this.views.listDrag.hide();
        this.views.details.hide();
        this.views.footer.toggle(this.model.files.hasOpenFiles());
        this.hideSettings();
        this.hideOpenFile();
        this.views.open = new OpenView({ model: this.model });
        this.views.open.setElement(this.$el.find('.app__body')).render();
        this.views.open.on('cancel', this.showEntries, this);
    },

    showEntries: function() {
        this.views.menu.show();
        this.views.menuDrag.show();
        this.views.list.show();
        this.views.listDrag.show();
        this.views.details.show();
        this.views.footer.show();
        this.hideOpenFile();
        this.hideSettings();
    },

    hideOpenFile: function() {
        if (this.views.open) {
            this.views.open.remove();
            this.views.open = null;
        }
    },

    hideSettings: function() {
        if (this.views.settings) {
            this.model.menu.setMenu('app');
            this.views.settings.remove();
            this.views.settings = null;
        }
    },

    showSettings: function(selectedMenuItem) {
        this.model.menu.setMenu('settings');
        this.views.menu.show();
        this.views.menuDrag.show();
        this.views.list.hide();
        this.views.listDrag.hide();
        this.views.details.hide();
        this.hideOpenFile();
        this.views.settings = new SettingsView();
        this.views.settings.setElement(this.$el.find('.app__body')).render();
        if (!selectedMenuItem) {
            selectedMenuItem = this.model.menu.generalSection.get('items').first();
        }
        this.model.menu.select({ item: selectedMenuItem });
    },

    fileListUpdated: function() {
        if (this.model.files.hasOpenFiles()) {
            this.showEntries();
        } else {
            this.showOpenFile();
        }
    },

    showFileSettings: function(e) {
        var menuItem = this.model.menu.filesSection.get('items').find(function(item) {
            return item.get('file').cid === e.fileId;
        });
        if (this.views.settings) {
            if (this.views.settings.file === menuItem.get('file')) {
                this.showEntries();
            } else {
                this.model.menu.select({ item: menuItem });
            }
        } else {
            this.showSettings(menuItem);
        }
    },

    toggleOpenFile: function() {
        if (this.views.open) {
            this.showEntries();
        } else {
            this.showOpenFile();
        }
    },

    beforeUnload: function() {
        if (this.model.files.hasUnsavedFiles()) {
            return 'You have unsaved files, all changes will be lost.';
        }
    },

    windowResize: function() {
        Backbone.trigger('page-geometry', { source: 'window' });
    },

    escPressed: function() {
        if (this.views.open && this.model.files.hasOpenFiles()) {
            this.showEntries();
        }
    },

    backspacePressed: function(e) {
        if (e.target === document.body) {
            e.preventDefault();
        }
    },

    menuSelect: function(item) {
        this.model.menu.select(item);
    },

    lockWorkspace: function() {
        this.model.closeAllFiles();
    },

    saveAll: function() {
        this.showFileSettings({ fileId: this.model.files.first().cid });
    },

    toggleSettings: function(page) {
        var menuItem = page ? this.model.menu[page + 'Section'] : null;
        if (menuItem) {
            menuItem = menuItem.get('items').first();
        }
        if (this.views.settings) {
            if (this.views.settings.page === page || !menuItem) {
                this.showEntries();
            } else {
                if (menuItem) {
                    this.model.menu.select({item: menuItem});
                }
            }
        } else {
            this.showSettings();
            if (menuItem) {
                this.model.menu.select({item: menuItem});
            }
        }
    },

    toggleMenu: function() {
        this.views.menu.switchVisibility();
    },

    switchView: function() {
        Alerts.notImplemented();
    },

    contextmenu: function(e) {
        if (['input', 'textarea'].indexOf(e.target.tagName.toLowerCase()) < 0) {
            e.preventDefault();
        }
    },

    dragover: function(e) {
        e.preventDefault();
    },

    drop: function(e) {
        e.preventDefault();
    },

    setTheme: function() {
        var theme = this.model.settings.get('theme');
        _.forEach(document.body.classList, function(cls) {
            if (/^th\-/.test(cls)) {
                document.body.classList.remove(cls);
            }
        });
        document.body.classList.add('th-' + theme);
    },

    extLinkClick: function(e) {
        if (Launcher) {
            e.preventDefault();
            Launcher.openLink(e.target.href);
        }
    }
});

module.exports = AppView;