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285 lines
11 KiB
JavaScript
285 lines
11 KiB
JavaScript
// 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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* Javascript helper function for IMS Content Package module.
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*
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* @package mod
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* @subpackage imscp
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* @copyright 2009 Petr Skoda {@link http://skodak.org}
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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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M.mod_imscp = {};
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M.mod_imscp.init = function(Y) {
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var imscp_layout_widget;
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var imscp_current_node;
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var imscp_buttons = [];
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var imscp_bloody_labelclick = false;
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Y.use('yui2-resize', 'yui2-dragdrop', 'yui2-container', 'yui2-button', 'yui2-layout', 'yui2-treeview', 'yui2-json', 'yui2-event', function(Y) {
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var imscp_activate_item = function(node) {
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if (!node) {
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return;
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}
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imscp_current_node = node;
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imscp_current_node.highlight();
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var content = new Y.YUI2.util.Element('imscp_content');
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try {
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// first try IE way - it can not set name attribute later
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// and also it has some restrictions on DOM access from object tag
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var obj = document.createElement('<iframe id="imscp_object" src="'+node.href+'">');
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} catch (e) {
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var obj = document.createElement('object');
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obj.setAttribute('id', 'imscp_object');
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obj.setAttribute('type', 'text/html');
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obj.setAttribute('data', node.href);
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}
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var old = Y.YUI2.util.Dom.get('imscp_object');
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if (old) {
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content.replaceChild(obj, old);
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} else {
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content.appendChild(obj);
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}
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imscp_resize_frame();
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imscp_current_node.focus();
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imscp_fixnav();
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};
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/**
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* Enables/disables navigation buttons as needed.
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* @return void
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*/
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var imscp_fixnav = function() {
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imscp_buttons[0].set('disabled', (imscp_skipprev(imscp_current_node) == null));
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imscp_buttons[1].set('disabled', (imscp_prev(imscp_current_node) == null));
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imscp_buttons[2].set('disabled', (imscp_up(imscp_current_node) == null));
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imscp_buttons[3].set('disabled', (imscp_next(imscp_current_node) == null));
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imscp_buttons[4].set('disabled', (imscp_skipnext(imscp_current_node) == null));
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};
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var imscp_resize_layout = function(alsowidth) {
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if (alsowidth) {
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var layout = Y.YUI2.util.Dom.get('imscp_layout');
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var newwidth = imscp_get_htmlelement_size('maincontent', 'width');
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layout.style.width = '600px';
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if (newwidth > 600) {
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layout.style.width = newwidth+'px';
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}
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}
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// make sure that the max width of the TOC doesn't go to far
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var left = imscp_layout_widget.getUnitByPosition('left');
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var maxwidth = parseInt(Y.YUI2.util.Dom.getStyle('imscp_layout', 'width'));
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left.set('maxWidth', (maxwidth - 10));
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var cwidth = left.get('width');
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if (cwidth > (maxwidth - 10)) {
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left.set('width', (maxwidth - 10));
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}
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var headerheight = imscp_get_htmlelement_size('page-header', 'height');
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var footerheight = imscp_get_htmlelement_size('page-footer', 'height');
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var newheight = parseInt(Y.YUI2.util.Dom.getViewportHeight()) - footerheight - headerheight - 20;
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if (newheight < 400) {
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newheight = 400;
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}
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imscp_layout_widget.setStyle('height', newheight+'px');
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imscp_layout_widget.render();
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imscp_resize_frame();
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};
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var imscp_get_htmlelement_size = function(el, prop) {
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var val = Y.YUI2.util.Dom.getStyle(el, prop);
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if (val == 'auto') {
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if (el.get) {
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el = el.get('element'); // get real HTMLElement from YUI element
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}
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val = Y.YUI2.util.Dom.getComputedStyle(Y.YUI2.util.Dom.get(el), prop);
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}
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return parseInt(val);
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};
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var imscp_resize_frame = function() {
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var obj = Y.YUI2.util.Dom.get('imscp_object');
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if (obj) {
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var content = imscp_layout_widget.getUnitByPosition('center').get('wrap');
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// basically trap IE6 and 7
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if (Y.YUI2.env.ua.ie > 5 && Y.YUI2.env.ua.ie < 8) {
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if( obj.style.setAttribute ) {
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obj.style.setAttribute("cssText", 'width: ' +(content.offsetWidth - 6)+'px; height: ' + (content.offsetHeight - 10)+'px;');
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}
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else {
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obj.style.setAttribute('width', (content.offsetWidth - 6)+'px', 0);
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obj.style.setAttribute('height', (content.offsetHeight - 10)+'px', 0);
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}
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}
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else {
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obj.style.width = (content.offsetWidth - 6)+'px';
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obj.style.height = (content.offsetHeight - 10)+'px';
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}
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}
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};
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var imscp_up = function(node) {
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if (node.depth > 0) {
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return node.parent;
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}
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return null;
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};
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var imscp_lastchild = function(node) {
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if (node.children.length) {
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return imscp_lastchild(node.children[node.children.length-1]);
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} else {
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return node;
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}
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};
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var imscp_prev = function(node) {
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if (node.previousSibling && node.previousSibling.children.length) {
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return imscp_lastchild(node.previousSibling);
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}
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return imscp_skipprev(node);
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};
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var imscp_skipprev = function(node) {
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if (node.previousSibling) {
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return node.previousSibling;
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} else if (node.depth > 0) {
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return node.parent;
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}
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return null;
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};
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var imscp_next = function(node) {
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if (node.children.length) {
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return node.children[0];
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}
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return imscp_skipnext(node);
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};
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var imscp_skipnext = function(node) {
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if (node.nextSibling) {
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return node.nextSibling;
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} else if (node.depth > 0) {
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return imscp_skipnext(node.parent);
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}
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return null;
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};
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// layout
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Y.YUI2.widget.LayoutUnit.prototype.STR_COLLAPSE = M.str.moodle.hide;
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Y.YUI2.widget.LayoutUnit.prototype.STR_EXPAND = M.str.moodle.show;
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imscp_layout_widget = new Y.YUI2.widget.Layout('imscp_layout', {
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minWidth: 600,
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minHeight: 400,
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units: [
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{ position: 'left', body: 'imscp_toc', header: M.str.imscp.toc, width: 250, resize: true, gutter: '2px 5px 5px 2px', collapse: true, minWidth:150},
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{ position: 'center', body: '<div id="imscp_content"></div>', gutter: '2px 5px 5px 2px', scroll: true}
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]
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});
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imscp_layout_widget.render();
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var left = imscp_layout_widget.getUnitByPosition('left');
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left.on('collapse', function() {
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imscp_resize_frame();
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});
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left.on('expand', function() {
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imscp_resize_frame();
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});
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// ugly resizing hack that works around problems with resizing of iframes and objects
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left._resize.on('startResize', function() {
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var obj = Y.YUI2.util.Dom.get('imscp_object');
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obj.style.display = 'none';
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});
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left._resize.on('endResize', function() {
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var obj = Y.YUI2.util.Dom.get('imscp_object');
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obj.style.display = 'block';
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imscp_resize_frame();
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});
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// TOC tree
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var tree = new Y.YUI2.widget.TreeView('imscp_tree');
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tree.singleNodeHighlight = true;
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tree.subscribe('clickEvent', function(oArgs) {
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imscp_activate_item(oArgs.node);
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if (oArgs.node.children.length) {
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imscp_bloody_labelclick = true;
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}
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Y.YUI2.util.Event.preventDefault(oArgs.event);
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return false;
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});
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tree.subscribe('collapse', function(node) {
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if (imscp_bloody_labelclick) {
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imscp_bloody_labelclick = false;
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return false;
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}
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});
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tree.subscribe('expand', function(node) {
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if (imscp_bloody_labelclick) {
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imscp_bloody_labelclick = false;
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return false;
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}
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});
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tree.expandAll();
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tree.render();
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var navbar = Y.YUI2.util.Dom.get('imscp_nav');
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navbar.style.display = 'block';
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// navigation
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imscp_buttons[0] = new Y.YUI2.widget.Button('nav_skipprev');
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imscp_buttons[1] = new Y.YUI2.widget.Button('nav_prev');
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imscp_buttons[2] = new Y.YUI2.widget.Button('nav_up');
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imscp_buttons[3] = new Y.YUI2.widget.Button('nav_next');
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imscp_buttons[4] = new Y.YUI2.widget.Button('nav_skipnext');
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imscp_buttons[0].on('click', function(ev) {
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imscp_activate_item(imscp_skipprev(imscp_current_node));
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});
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imscp_buttons[1].on('click', function(ev) {
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imscp_activate_item(imscp_prev(imscp_current_node));
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});
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imscp_buttons[2].on('click', function(ev) {
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imscp_activate_item(imscp_up(imscp_current_node));
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});
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imscp_buttons[3].on('click', function(ev) {
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imscp_activate_item(imscp_next(imscp_current_node));
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});
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imscp_buttons[4].on('click', function(ev) {
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imscp_activate_item(imscp_skipnext(imscp_current_node));
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});
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// finally activate the first item
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imscp_activate_item(tree.getRoot().children[0]);
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// resizing
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imscp_resize_layout(false);
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// fix layout if window resized
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window.onresize = function() {
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imscp_resize_layout(true);
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};
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});
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};
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