117 rivejä
3,1 KiB
JavaScript
117 rivejä
3,1 KiB
JavaScript
/********************************************************
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* *
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* Javascript for the Title-Footer plugin for Reveal.js *
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* *
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* Author: Igor Leturia *
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* *
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* License: GPL v3 *
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* http://www.gnu.org/copyleft/gpl.html *
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* *
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********************************************************/
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/* Title-Footer object and properties declaration with default values */
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var title_footer=
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{
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title: '',
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background:'rgba(0,0,0,0.1)',
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};
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/* Function to obtain all child elements with any of the indicated tags (from http://www.quirksmode.org/dom/getElementsByTagNames.html) */
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title_footer.getElementsByTagNames=function(list,obj)
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{
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if (!obj)
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{
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var obj=document;
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};
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var tagNames=list.split(',');
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var resultArray=new Array();
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for (var i=0;i<tagNames.length;i++)
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{
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var tags=obj.getElementsByTagName(tagNames[i]);
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for (var j=0;j<tags.length;j++)
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{
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resultArray.push(tags[j]);
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};
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};
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var testNode=resultArray[0];
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if (!testNode)
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{
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return [];
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};
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if (testNode.sourceIndex)
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{
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resultArray.sort(
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function (a,b)
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{
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return a.sourceIndex-b.sourceIndex;
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}
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);
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}
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else if (testNode.compareDocumentPosition)
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{
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resultArray.sort(
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function (a,b)
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{
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return 3-(a.compareDocumentPosition(b)&6);
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}
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);
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};
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return resultArray;
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};
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/* Method to initialize the Title-Footer footer */
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title_footer.initialize=function(title,background)
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{
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// Link to the Title-Footer CSS
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var link=document.createElement("link");
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link.href="plugin/title-footer/title-footer.css";
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link.type="text/css";
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link.rel="stylesheet";
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document.getElementsByTagName("head")[0].appendChild(link);
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// Initialize properties according to parameters
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this.background=background || 'rgba(0,0,0,0.1)';
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var title=title || '';
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if (title!='')
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{
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this.title=title;
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}
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else
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{
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var first_section=document.getElementsByTagName('section')[0];
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if (first_section.getElementsByTagName('section').length>0)
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{
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first_section=first_section.getElementsByTagName('section')[0];
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};
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var title_elements=this.getElementsByTagNames('h1,h2,h3',first_section);
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if (title_elements.length>0)
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{
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this.title=title_elements[0].textContent;
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for (var title_elements_index=1;title_elements_index<title_elements.length;title_elements_index++)
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{
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this.title=this.title+' - '+title_elements[title_elements_index].textContent;
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};
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};
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};
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// Create the Title-Footer footer
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var title_footer=document.createElement('footer');
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title_footer.setAttribute('id','title-footer');
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title_footer.setAttribute('style','background:'+this.background);
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var title_footer_p=document.createElement('p');
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title_footer.appendChild(title_footer_p);
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var a_element=document.createElement('a');
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a_element.setAttribute('href','#/0');
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a_element.appendChild(document.createTextNode(this.title));
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title_footer_p.appendChild(a_element);
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var div_class_reveal=document.querySelectorAll('.reveal')[0];
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div_class_reveal.appendChild(title_footer);
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};
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