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This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * This module allows to enhance the form elements MoodleQuickForm_filetypes\n *\n * @module core_form/filetypes\n * @package core_form\n * @copyright 2017 David Mudrak <david@moodle.com>\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n * @since 3.3\n */\ndefine(['jquery', 'core/log', 'core/str', 'core/modal_factory', 'core/modal_events', 'core/ajax',\n 'core/templates', 'core/tree'],\n function($, Log, Str, ModalFactory, ModalEvents, Ajax, Templates, Tree) {\n\n \"use strict\";\n\n /**\n * Constructor of the FileTypes instances.\n *\n * @constructor\n * @param {String} elementId The id of the form element to enhance\n * @param {String} elementLabel The label of the form element used as the modal selector title\n * @param {String} onlyTypes Limit the list of offered types to this\n * @param {Bool} allowAll Allow presence of the \"All file types\" item\n */\n var FileTypes = function(elementId, elementLabel, onlyTypes, allowAll) {\n\n this.elementId = elementId;\n this.elementLabel = elementLabel;\n this.onlyTypes = onlyTypes;\n this.allowAll = allowAll;\n\n this.inputField = $('#' + elementId);\n this.wrapperBrowserTrigger = $('[data-filetypesbrowser=\"' + elementId + '\"]');\n this.wrapperDescriptions = $('[data-filetypesdescriptions=\"' + elementId + '\"]');\n\n if (!this.wrapperBrowserTrigger.length) {\n // This is a valid case. Most probably the element is frozen and\n // the filetypes browser should not be available.\n return;\n }\n\n if (!this.inputField.length || !this.wrapperDescriptions.length) {\n Log.error('core_form/filetypes: Unexpected DOM structure, unable to enhance filetypes field ' + elementId);\n return;\n }\n\n this.prepareBrowserTrigger()\n .then(function() {\n return this.prepareBrowserModal();\n }.bind(this))\n\n .then(function() {\n return this.prepareBrowserTree();\n }.bind(this));\n };\n\n /**\n * Create and set the browser trigger widget (this.browserTrigger).\n *\n * @method prepareBrowserTrigger\n * @returns {Promise}\n */\n FileTypes.prototype.prepareBrowserTrigger = function() {\n return Templates.render('core_form/filetypes-trigger', {})\n .then(function(html) {\n this.wrapperBrowserTrigger.html(html);\n this.browserTrigger = this.wrapperBrowserTrigger.find('[data-filetypeswidget=\"browsertrigger\"]');\n }.bind(this));\n };\n\n /**\n * Create and set the modal for displaying the browser (this.browserModal).\n *\n * @method prepareBrowserModal\n * @returns {Promise}\n */\n FileTypes.prototype.prepareBrowserModal = function() {\n return ModalFactory.create({\n type: ModalFactory.types.SAVE_CANCEL,\n title: this.elementLabel\n\n }).then(function(modal) {\n this.browserModal = modal;\n }.bind(this))\n\n .then(function() {\n // Because we have custom conditional modal trigger, we need to\n // handle the focus after closing ourselves, too.\n this.browserModal.getRoot().on(ModalEvents.hidden, function() {\n this.browserTrigger.focus();\n }.bind(this));\n\n this.browserModal.getRoot().on(ModalEvents.save, function() {\n this.saveBrowserModal();\n }.bind(this));\n }.bind(this));\n\n };\n\n /**\n * Create and set the tree in the browser modal's body.\n *\n * @method prepareBrowserTree\n * @returns {Promise}\n */\n FileTypes.prototype.prepareBrowserTree = function() {\n\n this.browserTrigger.on('click', function(e) {\n e.preventDefault();\n\n // We want to display the browser modal only when the associated input\n // field is not frozen (disabled).\n if (this.inputField.is('[disabled]')) {\n return;\n }\n\n var bodyContent = this.loadBrowserModalBody();\n\n bodyContent.then(function() {\n\n // Turn the list of groups and extensions into the tree.\n this.browserTree = new Tree(this.browserModal.getBody());\n\n // Override the behaviour of the Enter and Space keys to toggle our checkbox,\n // rather than toggle the tree node expansion status.\n this.browserTree.handleKeyDown = function(item, e) {\n if (e.keyCode == this.browserTree.keys.enter || e.keyCode == this.browserTree.keys.space) {\n e.preventDefault();\n e.stopPropagation();\n this.toggleCheckbox(item.attr('data-filetypesbrowserkey'));\n } else {\n Tree.prototype.handleKeyDown.call(this.browserTree, item, e);\n }\n }.bind(this);\n\n if (this.allowAll) {\n // Hide all other items if \"All file types\" is enabled.\n this.hideOrShowItemsDependingOnAllowAll(this.browserModal.getRoot()\n .find('input[type=\"checkbox\"][data-filetypesbrowserkey=\"*\"]:first'));\n // And do the same whenever we click that checkbox.\n this.browserModal.getRoot().on('change', 'input[type=\"checkbox\"][data-filetypesbrowserkey=\"*\"]', function(e) {\n this.hideOrShowItemsDependingOnAllowAll($(e.currentTarget));\n }.bind(this));\n }\n\n // Synchronize checked status if the file extension is present in multiple groups.\n this.browserModal.getRoot().on('change', 'input[type=\"checkbox\"][data-filetypesbrowserkey]', function(e) {\n var checkbox = $(e.currentTarget);\n var key = checkbox.attr('data-filetypesbrowserkey');\n this.browserModal.getRoot().find('input[type=\"checkbox\"][data-filetypesbrowserkey=\"' + key + '\"]')\n .prop('checked', checkbox.prop('checked'));\n }.bind(this));\n\n }.bind(this))\n\n .then(function() {\n this.browserModal.show();\n }.bind(this));\n\n this.browserModal.setBody(bodyContent);\n\n }.bind(this));\n\n // Return a resolved promise.\n return $.when();\n };\n\n /**\n * Load the browser modal body contents.\n *\n * @returns {Promise}\n */\n FileTypes.prototype.loadBrowserModalBody = function() {\n\n var args = {\n onlytypes: this.onlyTypes.join(),\n allowall: this.allowAll,\n current: this.inputField.val()\n };\n\n return Ajax.call([{\n methodname: 'core_form_get_filetypes_browser_data',\n args: args\n\n }])[0].then(function(browserData) {\n return Templates.render('core_form/filetypes-browser', {\n elementid: this.elementId,\n groups: browserData.groups\n });\n }.bind(this));\n };\n\n /**\n * Change the checked status of the given file type (group or extension).\n *\n * @method toggleCheckbox\n * @param {String} key\n */\n FileTypes.prototype.toggleCheckbox = function(key) {\n\n var checkbox = this.browserModal.getRoot().find('input[type=\"checkbox\"][data-filetypesbrowserkey=\"' + key + '\"]:first');\n\n checkbox.prop('checked', !checkbox.prop('checked'));\n };\n\n /**\n * Update the associated input field with selected file types.\n *\n * @method saveBrowserModal\n */\n FileTypes.prototype.saveBrowserModal = function() {\n\n // Check the \"All file types\" first.\n if (this.allowAll) {\n var allcheckbox = this.browserModal.getRoot().find('input[type=\"checkbox\"][data-filetypesbrowserkey=\"*\"]');\n if (allcheckbox.length && allcheckbox.prop('checked')) {\n this.inputField.val('*');\n this.updateDescriptions(['*']);\n return;\n }\n }\n\n // Iterate over all checked boxes and populate the list.\n var newvalue = [];\n\n this.browserModal.getRoot().find('input[type=\"checkbox\"]').each(/** @this represents the checkbox */ function() {\n var checkbox = $(this);\n var key = checkbox.attr('data-filetypesbrowserkey');\n\n if (checkbox.prop('checked')) {\n newvalue.push(key);\n }\n });\n\n // Remove duplicates (e.g. file types present in multiple groups).\n newvalue = newvalue.filter(function(x, i, a) {\n return a.indexOf(x) == i;\n });\n\n this.inputField.val(newvalue.join(' '));\n this.updateDescriptions(newvalue);\n };\n\n /**\n * Describe the selected filetypes in the form when saving the browser.\n *\n * @param {Array} keys List of keys to describe\n * @returns {Promise}\n */\n FileTypes.prototype.updateDescriptions = function(keys) {\n\n var descriptions = [];\n\n keys.forEach(function(key) {\n descriptions.push({\n description: this.browserModal.getRoot().find('[data-filetypesname=\"' + key + '\"]:first').text().trim(),\n extensions: this.browserModal.getRoot().find('[data-filetypesextensions=\"' + key + '\"]:first').text().trim()\n });\n }.bind(this));\n\n var templatedata = {\n hasdescriptions: (descriptions.length > 0),\n descriptions: descriptions\n };\n\n return Templates.render('core_form/filetypes-descriptions', templatedata)\n .then(function(html) {\n this.wrapperDescriptions.html(html);\n }.bind(this));\n };\n\n /**\n * If \"All file types\" is checked, all other browser items are made hidden, and vice versa.\n *\n * @param {jQuery} allcheckbox The \"All file types\" checkbox.\n */\n FileTypes.prototype.hideOrShowItemsDependingOnAllowAll = function(allcheckbox) {\n var others = this.browserModal.getRoot().find('[role=\"treeitem\"][data-filetypesbrowserkey!=\"*\"]');\n if (allcheckbox.prop('checked')) {\n others.hide();\n } else {\n others.show();\n }\n };\n\n return {\n init: function(elementId, elementLabel, onlyTypes, allowAll) {\n new FileTypes(elementId, elementLabel, onlyTypes, allowAll);\n }\n };\n});\n"],"file":"filetypes.min.js"}