Difference between revisions of "MediaWiki/Slideshow"

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(adds indentation to make the script more readable)
(link to where I found the script)
Line 3: Line 3:
 
One method is to simply parse the wiki markup itself and turn that into slides by effectively walking through the structure of the page (one slide for each section, and stepping through the bullets).  For this approach, a Greasemonkey script will do.
 
One method is to simply parse the wiki markup itself and turn that into slides by effectively walking through the structure of the page (one slide for each section, and stepping through the bullets).  For this approach, a Greasemonkey script will do.
  
[http://phiffer.org Dan Phiffer] wrote the following Greasemonkey script that [http://userscripts.org/scripts/show/6372 turns any MediaWiki article into a slide presentation].  The [[CSS]] was changed just a bit by Greg Rundlett to ensure compatibility with projectors.
+
[http://phiffer.org Dan Phiffer] created the following Greasemonkey script (which I found courtesy of [http://www.darcynorman.net/2007/05/02/mediawiki-as-a-presentation-application/ D'Arcy Norman]) that [http://userscripts.org/scripts/show/6372 turns any MediaWiki article into a slide presentation].  The [[CSS]] was changed just a bit by Greg Rundlett to ensure compatibility with projectors.
 
<source lang="javascript">
 
<source lang="javascript">
 
// ==UserScript==
 
// ==UserScript==
Line 12: Line 12:
  
 
var wikipedia_presentation = {
 
var wikipedia_presentation = {
    setup: function() {
+
setup: function() {
       
+
 
        this.sections = [];
+
this.sections = [];
        this.pos = 0;
+
this.pos = 0;
       
+
 
        var body = document.getElementsByTagName('body')[0];
+
var body = document.getElementsByTagName('body')[0];
        this.orig_markup = body.innerHTML;
+
this.orig_markup = body.innerHTML;
        var markup = body.innerHTML;
+
var markup = body.innerHTML;
        var start = 0;
+
var start = 0;
        var end = markup.indexOf('<span class="editsection"');
+
var end = markup.indexOf('<span class="editsection"');
        while (end != -1) {
+
while (end != -1) {
            start = markup.indexOf('</span>', end);
+
start = markup.indexOf('</span>', end);
            end = markup.indexOf('<span class="editsection"', start);
+
end = markup.indexOf('<span class="editsection"', start);
            if (end == -1) {
+
if (end == -1) {
                end = markup.indexOf('<div class="printfooter">', start);
+
end = markup.indexOf('<div class="printfooter">', start);
                this.sections.push(markup.substr(start, end - start));
+
this.sections.push(markup.substr(start, end - start));
                end = -1;
+
end = -1;
            }
+
}
            this.sections.push(markup.substr(start, end - start));
+
this.sections.push(markup.substr(start, end - start));
        }
+
}
        if (this.sections.length > 0) {
+
if (this.sections.length > 0) {
            var div = document.getElementById('bodyContent');
+
var div = document.getElementById('bodyContent');
            var link = div.insertBefore(document.createElement('a'), div.firstChild);
+
var link = div.insertBefore(document.createElement('a'), div.firstChild);
            link.innerHTML = 'Start presentation';
+
link.innerHTML = 'Start presentation';
            link.setAttribute('href', '#presentation');
+
link.setAttribute('href', '#presentation');
            link.addEventListener('click', this.start, false);
+
link.addEventListener('click', this.start, false);
        }
+
}
    },
+
},
   
+
 
    start: function() {
+
start: function() {
        var body = document.getElementsByTagName('body')[0];
+
var body = document.getElementsByTagName('body')[0];
        body.innerHTML = '';
+
body.innerHTML = '';
        body.style.textAlign = 'center';
+
body.style.textAlign = 'center';
       
+
 
        var prev = body.appendChild(document.createElement('a'));
+
var prev = body.appendChild(document.createElement('a'));
        prev.innerHTML = '&larr; Prev';
+
prev.innerHTML = '&larr; Prev';
        prev.setAttribute('href', '#prev');
+
prev.setAttribute('href', '#prev');
        prev.style.font = '11px verdana, sans-serif';
+
prev.style.font = '11px verdana, sans-serif';
        prev.addEventListener('click', function() {
+
prev.addEventListener('click', function() {
          wikipedia_presentation.prev();
+
wikipedia_presentation.prev();
        }, false);
+
}, false);
       
+
 
        body.appendChild(document.createTextNode(' / '));
+
body.appendChild(document.createTextNode(' / '));
       
+
 
        var stop = body.appendChild(document.createElement('a'));
+
var stop = body.appendChild(document.createElement('a'));
        stop.innerHTML = 'Exit';
+
stop.innerHTML = 'Exit';
        stop.setAttribute('href', '#exit');
+
stop.setAttribute('href', '#exit');
        stop.style.font = '11px verdana, sans-serif';
+
stop.style.font = '11px verdana, sans-serif';
        stop.addEventListener('click', function() {
+
stop.addEventListener('click', function() {
          wikipedia_presentation.stop();
+
wikipedia_presentation.stop();
        }, false);
+
}, false);
       
+
 
        body.appendChild(document.createTextNode(' / '));
+
body.appendChild(document.createTextNode(' / '));
       
+
 
        var next = body.appendChild(document.createElement('a'));
+
var next = body.appendChild(document.createElement('a'));
        next.innerHTML = 'Next &rarr;';
+
next.innerHTML = 'Next &rarr;';
        next.setAttribute('href', '#next');
+
next.setAttribute('href', '#next');
        next.style.font = '11px verdana, sans-serif';
+
next.style.font = '11px verdana, sans-serif';
        next.addEventListener('click', function() {
+
next.addEventListener('click', function() {
          wikipedia_presentation.next();
+
wikipedia_presentation.next();
        }, false);
+
}, false);
       
+
 
        var slide = body.appendChild(document.createElement('div'));
+
var slide = body.appendChild(document.createElement('div'));
        slide.setAttribute('id', 'wikipedia_presentation');
+
slide.setAttribute('id', 'wikipedia_presentation');
        slide.style.width = '780px';
+
slide.style.width = '780px';
        // slide.style.background = 'red';
+
// slide.style.background = 'red';
        slide.style.margin = '10px 10px 10px 20px';
+
slide.style.margin = '10px 10px 10px 20px';
        slide.style.textAlign = 'left';
+
slide.style.textAlign = 'left';
        slide.style.font = '2em verdana, sans-serif';
+
slide.style.font = '2em verdana, sans-serif';
       
+
 
        slide.innerHTML = wikipedia_presentation.sections[0];
+
slide.innerHTML = wikipedia_presentation.sections[0];
        var items = slide.getElementsByTagName('li');
+
var items = slide.getElementsByTagName('li');
        for (var i = 1; i < items.length; i++) {
+
for (var i = 1; i < items.length; i++) {
            items[i].style.display = 'none';
+
items[i].style.display = 'none';
        }
+
}
       
+
 
        document.addEventListener('keypress', wikipedia_presentation.keypress, false);
+
document.addEventListener('keypress', wikipedia_presentation.keypress, false);
    },
+
},
   
+
 
    stop: function() {
+
stop: function() {
        var body = document.getElementsByTagName('body')[0];
+
var body = document.getElementsByTagName('body')[0];
        body.innerHTML = wikipedia_presentation.orig_markup;
+
body.innerHTML = wikipedia_presentation.orig_markup;
        body.style.textAlign = 'left';
+
body.style.textAlign = 'left';
        wikipedia_presentation.setup();
+
wikipedia_presentation.setup();
        document.removeEventListener('keypress', wikipedia_presentation.keypress, false);
+
document.removeEventListener('keypress', wikipedia_presentation.keypress, false);
    },
+
},
   
+
 
    keypress: function(event) {
+
keypress: function(event) {
        if (event.keyCode == 39) {
+
if (event.keyCode == 39) {
            wikipedia_presentation.next();
+
wikipedia_presentation.next();
        } else if (event.keyCode == 37) {
+
} else if (event.keyCode == 37) {
            wikipedia_presentation.prev();
+
wikipedia_presentation.prev();
        }
+
}
    },
+
},
   
+
 
    prev: function() {
+
prev: function() {
        this.pos--;
+
this.pos--;
        if (this.pos == -1) {
+
if (this.pos == -1) {
            this.pos = this.sections.length - 1;
+
this.pos = this.sections.length - 1;
        }
+
}
        var slide = document.getElementById('wikipedia_presentation');
+
var slide = document.getElementById('wikipedia_presentation');
        slide.innerHTML = wikipedia_presentation.sections[this.pos];
+
slide.innerHTML = wikipedia_presentation.sections[this.pos];
    },
+
},
   
+
 
    next: function() {
+
next: function() {
       
+
 
        var slide = document.getElementById('wikipedia_presentation');
+
var slide = document.getElementById('wikipedia_presentation');
        var items = slide.getElementsByTagName('li');
+
var items = slide.getElementsByTagName('li');
       
+
 
        var hidden = 0;
+
var hidden = 0;
        for (var i = 0; i < items.length; i++) {
+
for (var i = 0; i < items.length; i++) {
            if (items[i].style.display == 'none') {
+
if (items[i].style.display == 'none') {
                hidden++;
+
hidden++;
            }
+
}
        }
+
}
       
+
 
        if (hidden > 0) {
+
if (hidden > 0) {
            items[items.length - hidden].style.display = 'list-item';
+
items[items.length - hidden].style.display = 'list-item';
            return;
+
return;
        }
+
}
       
+
 
        this.pos++;
+
this.pos++;
        if (this.pos == this.sections.length) {
+
if (this.pos == this.sections.length) {
            this.pos = 0;
+
this.pos = 0;
        }
+
}
        slide.innerHTML = wikipedia_presentation.sections[this.pos];
+
slide.innerHTML = wikipedia_presentation.sections[this.pos];
        var items = slide.getElementsByTagName('li');
+
var items = slide.getElementsByTagName('li');
        for (var i = 1; i < items.length; i++) {
+
for (var i = 1; i < items.length; i++) {
            items[i].style.display = 'none';
+
items[i].style.display = 'none';
        }
+
}
       
+
 
    }
+
}
 
};
 
};
  

Revision as of 00:27, 6 December 2008

If you're using MediaWiki, then you are accustomed to being able to quickly and efficiently organize your thoughts. It's a natural extension then to want to use those same "notes" in a presentation. There are many ways to achieve such a result.

One method is to simply parse the wiki markup itself and turn that into slides by effectively walking through the structure of the page (one slide for each section, and stepping through the bullets). For this approach, a Greasemonkey script will do.

Dan Phiffer created the following Greasemonkey script (which I found courtesy of D'Arcy Norman) that turns any MediaWiki article into a slide presentation.  The CSS was changed just a bit by Greg Rundlett to ensure compatibility with projectors.
// ==UserScript==
// @name           Wikipedia Presentation
// @namespace      http://phiffer.org/
// @description    Turn a Wikipedia article into a presentation
// ==/UserScript==

var wikipedia_presentation = {
setup: function() {

this.sections = [];
this.pos = 0;

var body = document.getElementsByTagName('body')[0];
this.orig_markup = body.innerHTML;
var markup = body.innerHTML;
var start = 0;
var end = markup.indexOf('<span class="editsection"');
while (end != -1) {
start = markup.indexOf('</span>', end);
end = markup.indexOf('<span class="editsection"', start);
if (end == -1) {
end = markup.indexOf('<div class="printfooter">', start);
this.sections.push(markup.substr(start, end - start));
end = -1;
}
this.sections.push(markup.substr(start, end - start));
}
if (this.sections.length > 0) {
var div = document.getElementById('bodyContent');
var link = div.insertBefore(document.createElement('a'), div.firstChild);
link.innerHTML = 'Start presentation';
link.setAttribute('href', '#presentation');
link.addEventListener('click', this.start, false);
}
},

start: function() {
var body = document.getElementsByTagName('body')[0];
body.innerHTML = '';
body.style.textAlign = 'center';

var prev = body.appendChild(document.createElement('a'));
prev.innerHTML = '&larr; Prev';
prev.setAttribute('href', '#prev');
prev.style.font = '11px verdana, sans-serif';
prev.addEventListener('click', function() {
wikipedia_presentation.prev();
}, false);

body.appendChild(document.createTextNode(' / '));

var stop = body.appendChild(document.createElement('a'));
stop.innerHTML = 'Exit';
stop.setAttribute('href', '#exit');
stop.style.font = '11px verdana, sans-serif';
stop.addEventListener('click', function() {
wikipedia_presentation.stop();
}, false);

body.appendChild(document.createTextNode(' / '));

var next = body.appendChild(document.createElement('a'));
next.innerHTML = 'Next &rarr;';
next.setAttribute('href', '#next');
next.style.font = '11px verdana, sans-serif';
next.addEventListener('click', function() {
wikipedia_presentation.next();
}, false);

var slide = body.appendChild(document.createElement('div'));
slide.setAttribute('id', 'wikipedia_presentation');
slide.style.width = '780px';
// slide.style.background = 'red';
slide.style.margin = '10px 10px 10px 20px';
slide.style.textAlign = 'left';
slide.style.font = '2em verdana, sans-serif';

slide.innerHTML = wikipedia_presentation.sections[0];
var items = slide.getElementsByTagName('li');
for (var i = 1; i < items.length; i++) {
items[i].style.display = 'none';
}

document.addEventListener('keypress', wikipedia_presentation.keypress, false);
},

stop: function() {
var body = document.getElementsByTagName('body')[0];
body.innerHTML = wikipedia_presentation.orig_markup;
body.style.textAlign = 'left';
wikipedia_presentation.setup();
document.removeEventListener('keypress', wikipedia_presentation.keypress, false);
},

keypress: function(event) {
if (event.keyCode == 39) {
wikipedia_presentation.next();
} else if (event.keyCode == 37) {
wikipedia_presentation.prev();
}
},

prev: function() {
this.pos--;
if (this.pos == -1) {
this.pos = this.sections.length - 1;
}
var slide = document.getElementById('wikipedia_presentation');
slide.innerHTML = wikipedia_presentation.sections[this.pos];
},

next: function() {

var slide = document.getElementById('wikipedia_presentation');
var items = slide.getElementsByTagName('li');

var hidden = 0;
for (var i = 0; i < items.length; i++) {
if (items[i].style.display == 'none') {
hidden++;
}
}

if (hidden > 0) {
items[items.length - hidden].style.display = 'list-item';
return;
}

this.pos++;
if (this.pos == this.sections.length) {
this.pos = 0;
}
slide.innerHTML = wikipedia_presentation.sections[this.pos];
var items = slide.getElementsByTagName('li');
for (var i = 1; i < items.length; i++) {
items[i].style.display = 'none';
}

}
};

wikipedia_presentation.setup();