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