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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/*
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* @package atto_link
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* @copyright 2013 Damyon Wiese <damyon@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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/**
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* @module moodle-atto_link-button
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*/
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/**
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* Atto text editor link plugin.
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*
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* @namespace M.atto_link
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* @class button
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* @extends M.editor_atto.EditorPlugin
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*/
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var COMPONENTNAME = 'atto_link',
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CSS = {
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NEWWINDOW: 'atto_link_openinnewwindow',
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URLINPUT: 'atto_link_urlentry',
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URLTEXT: 'atto_link_urltext'
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},
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SELECTORS = {
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NEWWINDOW: '.atto_link_openinnewwindow',
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URLINPUT: '.atto_link_urlentry',
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URLTEXT: '.atto_link_urltext',
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SUBMIT: '.submit',
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LINKBROWSER: '.openlinkbrowser'
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},
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TEMPLATE = '' +
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'<form class="atto_form">' +
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'<div class="mb-1">' +
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'<label for="{{elementid}}_atto_link_urltext">{{get_string "texttodisplay" component}}</label>' +
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'<input class="form-control fullwidth {{CSS.URLTEXT}}" type="text" ' +
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'id="{{elementid}}_atto_link_urltext" size="32"/>' +
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'</div>' +
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'{{#if showFilepicker}}' +
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'<label for="{{elementid}}_atto_link_urlentry">{{get_string "enterurl" component}}</label>' +
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'<div class="input-group input-append w-100 mb-1">' +
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'<input class="form-control url {{CSS.URLINPUT}}" type="url" ' +
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'id="{{elementid}}_atto_link_urlentry"/>' +
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'<span class="input-group-append">' +
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'<button class="btn btn-secondary openlinkbrowser" type="button">' +
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'{{get_string "browserepositories" component}}</button>' +
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'</span>' +
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'</div>' +
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'{{else}}' +
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'<div class="mb-1">' +
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'<label for="{{elementid}}_atto_link_urlentry">{{get_string "enterurl" component}}</label>' +
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'<input class="form-control fullwidth url {{CSS.URLINPUT}}" type="url" ' +
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'id="{{elementid}}_atto_link_urlentry" size="32"/>' +
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'</div>' +
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'{{/if}}' +
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'<div class="form-check">' +
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'<input type="checkbox" class="form-check-input newwindow {{CSS.NEWWINDOW}}" ' +
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'id="{{elementid}}_{{CSS.NEWWINDOW}}"/>' +
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'<label class="form-check-label" for="{{elementid}}_{{CSS.NEWWINDOW}}">' +
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'{{get_string "openinnewwindow" component}}' +
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'</label>' +
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'</div>' +
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'<div class="mdl-align">' +
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'<br/>' +
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'<button type="submit" class="btn btn-secondary submit">{{get_string "createlink" component}}</button>' +
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'</div>' +
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'</form>';
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Y.namespace('M.atto_link').Button = Y.Base.create('button', Y.M.editor_atto.EditorPlugin, [], {
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/**
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* A reference to the current selection at the time that the dialogue
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* was opened.
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*
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* @property _currentSelection
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* @type Range
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* @private
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*/
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_currentSelection: null,
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/**
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* A reference to the dialogue content.
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*
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* @property _content
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* @type Node
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* @private
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*/
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_content: null,
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/**
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* Text to display has value or not.
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* @property _hasTextToDisplay
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* @type Boolean
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* @private
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*/
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_hasTextToDisplay: false,
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/**
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* User has selected plain text or not.
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* @property _hasPlainTextSelected
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* @type Boolean
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* @private
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*/
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_hasPlainTextSelected: false,
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initializer: function() {
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// Add the link button first.
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this.addButton({
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icon: 'e/insert_edit_link',
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keys: '75',
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callback: this._displayDialogue,
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tags: 'a',
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tagMatchRequiresAll: false
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});
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// And then the unlink button.
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this.addButton({
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buttonName: 'unlink',
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callback: this._unlink,
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icon: 'e/remove_link',
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title: 'unlink',
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// Watch the following tags and add/remove highlighting as appropriate:
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tags: 'a',
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tagMatchRequiresAll: false
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});
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},
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/**
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* Display the link editor.
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*
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* @method _displayDialogue
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* @private
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*/
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_displayDialogue: function() {
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// Store the current selection.
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this._currentSelection = this.get('host').getSelection();
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if (this._currentSelection === false) {
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return;
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}
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var dialogue = this.getDialogue({
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headerContent: M.util.get_string('createlink', COMPONENTNAME),
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width: 'auto',
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focusAfterHide: true,
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focusOnShowSelector: SELECTORS.URLINPUT
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});
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// Set the dialogue content, and then show the dialogue.
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dialogue.set('bodyContent', this._getDialogueContent());
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// Resolve anchors in the selected text.
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this._resolveAnchors();
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dialogue.show();
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},
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/**
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* If there is selected text and it is part of an anchor link,
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* extract the url (and target) from the link (and set them in the form).
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*
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* @method _resolveAnchors
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* @private
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*/
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_resolveAnchors: function() {
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// Find the first anchor tag in the selection.
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var selectednode = this.get('host').getSelectionParentNode(),
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anchornodes,
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anchornode,
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url,
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target,
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textToDisplay,
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title;
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// Note this is a document fragment and YUI doesn't like them.
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if (!selectednode) {
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return;
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}
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anchornodes = this._findSelectedAnchors(Y.one(selectednode));
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if (anchornodes.length > 0) {
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anchornode = anchornodes[0];
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this._currentSelection = this.get('host').getSelectionFromNode(anchornode);
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url = anchornode.getAttribute('href');
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target = anchornode.getAttribute('target');
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textToDisplay = anchornode.get('innerText');
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title = anchornode.getAttribute('title');
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if (url !== '') {
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this._content.one(SELECTORS.URLINPUT).setAttribute('value', url);
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}
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if (textToDisplay !== '') {
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this._content.one(SELECTORS.URLTEXT).set('value', textToDisplay);
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} else if (title !== '') {
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this._content.one(SELECTORS.URLTEXT).set('value', title);
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}
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if (target === '_blank') {
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this._content.one(SELECTORS.NEWWINDOW).setAttribute('checked', 'checked');
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} else {
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this._content.one(SELECTORS.NEWWINDOW).removeAttribute('checked');
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}
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} else {
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// User is selecting some text before clicking on the Link button.
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textToDisplay = this._getTextSelection();
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if (textToDisplay !== '') {
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this._hasTextToDisplay = true;
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this._hasPlainTextSelected = true;
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this._content.one(SELECTORS.URLTEXT).set('value', textToDisplay);
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}
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}
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},
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/**
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* Update the dialogue after a link was selected in the File Picker.
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*
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* @method _filepickerCallback
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* @param {object} params The parameters provided by the filepicker
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* containing information about the link.
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* @private
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*/
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_filepickerCallback: function(params) {
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this.getDialogue()
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.set('focusAfterHide', null)
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.hide();
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if (params.url !== '') {
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// Add the link.
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this._setLinkOnSelection(params.url);
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// And mark the text area as updated.
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this.markUpdated();
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}
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},
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/**
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* The link was inserted, so make changes to the editor source.
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*
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* @method _setLink
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* @param {EventFacade} e
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* @private
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*/
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_setLink: function(e) {
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var input,
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value;
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e.preventDefault();
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this.getDialogue({
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focusAfterHide: null
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}).hide();
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input = this._content.one(SELECTORS.URLINPUT);
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value = input.get('value');
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if (value !== '') {
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// We add a prefix if it is not already prefixed.
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value = value.trim();
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var expr = new RegExp(/^[a-zA-Z]*\.*\/|^#|^[a-zA-Z]*:/);
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if (!expr.test(value)) {
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value = 'http://' + value;
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}
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// Add the link.
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this._setLinkOnSelection(value);
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this.markUpdated();
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}
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},
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/**
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* Final step setting the anchor on the selection.
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*
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* @private
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* @method _setLinkOnSelection
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* @param {String} url URL the link will point to.
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* @return {Node} The added Node.
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*/
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_setLinkOnSelection: function(url) {
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var host = this.get('host'),
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link,
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selectednode,
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target,
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anchornodes,
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isUpdating,
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urlText,
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textToDisplay;
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this.editor.focus();
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host.setSelection(this._currentSelection);
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isUpdating = !this._currentSelection[0].collapsed;
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urlText = this._content.one(SELECTORS.URLTEXT);
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textToDisplay = urlText.get('value').replace(/(<([^>]+)>)/gi, "").trim();
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if (textToDisplay === '') {
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textToDisplay = url;
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}
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if (!isUpdating) {
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// Firefox cannot add links when the selection is empty so we will add it manually.
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link = Y.Node.create('<a>' + textToDisplay + '</a>');
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link.setAttribute('href', url);
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// Add the node and select it to replicate the behaviour of execCommand.
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selectednode = host.insertContentAtFocusPoint(link.get('outerHTML'));
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host.setSelection(host.getSelectionFromNode(selectednode));
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} else {
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document.execCommand('unlink', false, null);
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document.execCommand('createLink', false, url);
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// Now set the target.
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selectednode = host.getSelectionParentNode();
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}
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// Note this is a document fragment and YUI doesn't like them.
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if (!selectednode) {
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return;
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}
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anchornodes = this._findSelectedAnchors(Y.one(selectednode));
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// Add new window attributes if requested.
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Y.Array.each(anchornodes, function(anchornode) {
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target = this._content.one(SELECTORS.NEWWINDOW);
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if (target.get('checked')) {
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anchornode.setAttribute('target', '_blank');
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} else {
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anchornode.removeAttribute('target');
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}
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if (isUpdating && textToDisplay) {
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// The 'createLink' command do not allow to set the custom text to display. So we need to do it here.
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if (this._hasPlainTextSelected) {
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// Only replace the innerText if the user has not selected any element or just the plain text.
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anchornode.set('innerText', textToDisplay);
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} else {
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// The user has selected another element to add the hyperlink, like an image.
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// We should add the title attribute instead of replacing the innerText of the hyperlink.
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anchornode.setAttribute('title', textToDisplay);
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}
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}
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}, this);
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return selectednode;
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},
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/**
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* Look up and down for the nearest anchor tags that are least partly contained in the selection.
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*
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* @method _findSelectedAnchors
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* @param {Node} node The node to search under for the selected anchor.
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* @return {Node|Boolean} The Node, or false if not found.
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* @private
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*/
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_findSelectedAnchors: function(node) {
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var tagname = node.get('tagName'),
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hit, hits;
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// Direct hit.
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|
368 |
if (tagname && tagname.toLowerCase() === 'a') {
|
|
|
369 |
return [node];
|
|
|
370 |
}
|
|
|
371 |
|
|
|
372 |
// Search down but check that each node is part of the selection.
|
|
|
373 |
hits = [];
|
|
|
374 |
node.all('a').each(function(n) {
|
|
|
375 |
if (!hit && this.get('host').selectionContainsNode(n)) {
|
|
|
376 |
hits.push(n);
|
|
|
377 |
}
|
|
|
378 |
}, this);
|
|
|
379 |
if (hits.length > 0) {
|
|
|
380 |
return hits;
|
|
|
381 |
}
|
|
|
382 |
// Search up.
|
|
|
383 |
hit = node.ancestor('a');
|
|
|
384 |
if (hit) {
|
|
|
385 |
return [hit];
|
|
|
386 |
}
|
|
|
387 |
return [];
|
|
|
388 |
},
|
|
|
389 |
|
|
|
390 |
/**
|
|
|
391 |
* Generates the content of the dialogue.
|
|
|
392 |
*
|
|
|
393 |
* @method _getDialogueContent
|
|
|
394 |
* @return {Node} Node containing the dialogue content
|
|
|
395 |
* @private
|
|
|
396 |
*/
|
|
|
397 |
_getDialogueContent: function() {
|
|
|
398 |
var canShowFilepicker = this.get('host').canShowFilepicker('link'),
|
|
|
399 |
template = Y.Handlebars.compile(TEMPLATE);
|
|
|
400 |
|
|
|
401 |
this._content = Y.Node.create(template({
|
|
|
402 |
showFilepicker: canShowFilepicker,
|
|
|
403 |
component: COMPONENTNAME,
|
|
|
404 |
CSS: CSS
|
|
|
405 |
}));
|
|
|
406 |
|
|
|
407 |
this._content.one(SELECTORS.URLINPUT).on('keyup', this._updateTextToDisplay, this);
|
|
|
408 |
this._content.one(SELECTORS.URLINPUT).on('change', this._updateTextToDisplay, this);
|
|
|
409 |
this._content.one(SELECTORS.URLTEXT).on('keyup', this._setTextToDisplayState, this);
|
|
|
410 |
this._content.one(SELECTORS.SUBMIT).on('click', this._setLink, this);
|
|
|
411 |
if (canShowFilepicker) {
|
|
|
412 |
this._content.one(SELECTORS.LINKBROWSER).on('click', function(e) {
|
|
|
413 |
e.preventDefault();
|
|
|
414 |
this.get('host').showFilepicker('link', this._filepickerCallback, this);
|
|
|
415 |
}, this);
|
|
|
416 |
}
|
|
|
417 |
|
|
|
418 |
return this._content;
|
|
|
419 |
},
|
|
|
420 |
|
|
|
421 |
/**
|
|
|
422 |
* Unlinks the current selection.
|
|
|
423 |
* If the selection is empty (e.g. the cursor is placed within a link),
|
|
|
424 |
* then the whole link is unlinked.
|
|
|
425 |
*
|
|
|
426 |
* @method _unlink
|
|
|
427 |
* @private
|
|
|
428 |
*/
|
|
|
429 |
_unlink: function() {
|
|
|
430 |
var host = this.get('host'),
|
|
|
431 |
range = host.getSelection();
|
|
|
432 |
|
|
|
433 |
if (range && range.length) {
|
|
|
434 |
if (range[0].startOffset === range[0].endOffset) {
|
|
|
435 |
// The cursor was placed in the editor but there was no selection - select the whole parent.
|
|
|
436 |
var nodes = host.getSelectedNodes();
|
|
|
437 |
if (nodes) {
|
|
|
438 |
// We need to unlink each anchor individually - we cannot select a range because it may only consist of a
|
|
|
439 |
// fragment of an anchor. Selecting the parent would be dangerous because it may contain other links which
|
|
|
440 |
// would then be unlinked too.
|
|
|
441 |
nodes.each(function(node) {
|
|
|
442 |
// We need to select the whole anchor node for this to work in some browsers.
|
|
|
443 |
// We only need to search up because getSelectedNodes returns all Nodes in the selection.
|
|
|
444 |
var anchor = node.ancestor('a', true);
|
|
|
445 |
if (anchor) {
|
|
|
446 |
// Set the selection to the whole of the first anchor.
|
|
|
447 |
host.setSelection(host.getSelectionFromNode(anchor));
|
|
|
448 |
|
|
|
449 |
// Call the browser unlink.
|
|
|
450 |
document.execCommand('unlink', false, null);
|
|
|
451 |
}
|
|
|
452 |
}, this);
|
|
|
453 |
|
|
|
454 |
// And mark the text area as updated.
|
|
|
455 |
this.markUpdated();
|
|
|
456 |
}
|
|
|
457 |
} else {
|
|
|
458 |
// Call the browser unlink.
|
|
|
459 |
document.execCommand('unlink', false, null);
|
|
|
460 |
|
|
|
461 |
// And mark the text area as updated.
|
|
|
462 |
this.markUpdated();
|
|
|
463 |
}
|
|
|
464 |
}
|
|
|
465 |
},
|
|
|
466 |
|
|
|
467 |
/**
|
|
|
468 |
* Set the current text to display state.
|
|
|
469 |
*
|
|
|
470 |
* @method _setTextToDisplayState
|
|
|
471 |
* @private
|
|
|
472 |
*/
|
|
|
473 |
_setTextToDisplayState: function() {
|
|
|
474 |
var urlText,
|
|
|
475 |
urlTextVal;
|
|
|
476 |
urlText = this._content.one(SELECTORS.URLTEXT);
|
|
|
477 |
urlTextVal = urlText.get('value');
|
|
|
478 |
if (urlTextVal !== '') {
|
|
|
479 |
this._hasTextToDisplay = true;
|
|
|
480 |
} else {
|
|
|
481 |
this._hasTextToDisplay = false;
|
|
|
482 |
}
|
|
|
483 |
},
|
|
|
484 |
|
|
|
485 |
/**
|
|
|
486 |
* Update the text to display if the user does not provide the custom text.
|
|
|
487 |
*
|
|
|
488 |
* @method _updateTextToDisplay
|
|
|
489 |
* @private
|
|
|
490 |
*/
|
|
|
491 |
_updateTextToDisplay: function() {
|
|
|
492 |
var urlEntry,
|
|
|
493 |
urlText,
|
|
|
494 |
urlEntryVal;
|
|
|
495 |
urlEntry = this._content.one(SELECTORS.URLINPUT);
|
|
|
496 |
urlText = this._content.one(SELECTORS.URLTEXT);
|
|
|
497 |
urlEntryVal = urlEntry.get('value');
|
|
|
498 |
if (!this._hasTextToDisplay) {
|
|
|
499 |
urlText.set('value', urlEntryVal);
|
|
|
500 |
}
|
|
|
501 |
},
|
|
|
502 |
|
|
|
503 |
/**
|
|
|
504 |
* Get only the selected text.
|
|
|
505 |
* In some cases, window.getSelection() is not run as expected. We should only get the text value
|
|
|
506 |
* For ex: <img src="" alt="XYZ">Some text here
|
|
|
507 |
* window.getSelection() will return XYZSome text here
|
|
|
508 |
*
|
|
|
509 |
* @returns {string} Selected text
|
|
|
510 |
* @private
|
|
|
511 |
*/
|
|
|
512 |
_getTextSelection: function() {
|
|
|
513 |
var selText = '';
|
|
|
514 |
var sel = window.getSelection();
|
|
|
515 |
var rangeCount = sel.rangeCount;
|
|
|
516 |
if (rangeCount) {
|
|
|
517 |
var rangeTexts = [];
|
|
|
518 |
for (var i = 0; i < rangeCount; ++i) {
|
|
|
519 |
rangeTexts.push('' + sel.getRangeAt(i));
|
|
|
520 |
}
|
|
|
521 |
selText = rangeTexts.join('');
|
|
|
522 |
}
|
|
|
523 |
return selText;
|
|
|
524 |
}
|
|
|
525 |
});
|