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<main>
<h1>Keyboard Overflow Tests</h1>
<p>
This is an example for my post <cite><a href="http://adrianroselli.com/2016/02/keyboard-and-overflow.html">Keyboard and Overflow</a></cite>. That link also acts a handy tab-stop to see where you are as you start playing.
</p>
<h2>With Ellipsis</h2>
<table id="Books-ellipsis" class="ellipsis">
<colgroup>
<col>
<col>
<col class="number">
</colgroup>
<thead>
<tr>
<th>Author</th>
<th>Title</th>
<th class="number">Year</th>
</tr>
</thead>
<tbody>
<tr>
<td><div>Homer</div></td>
<td><div><em>Iliad</em></div></td>
<td class="number"><div>BC ~800</div></td>
</tr>
<tr>
<td><div>Miguel De Cervantes</div></td>
<td><div ><em>The Ingenious Gentleman Don Quixote of La Mancha</em></div></td>
<td class="number"><div>1605</div></td>
</tr>
<tr>
<td><div>Mary Shelley</div></td>
<td><div><em>Frankenstein; or, The Modern Prometheus</em></div></td>
<td class="number"><div>1818</div></td>
</tr>
<tr>
<td><div>Herman Melville</div></td>
<td><div><em>Moby-Dick; or, The Whale</em></div></td>
<td class="number"><div>1851</div></td>
</tr>
<tr>
<td><div>Emma Dorothy Eliza Nevitte Southworth</div></td>
<td><div><em>The Hidden Hand</em></div></td>
<td class="number"><div>1888</div></td>
</tr>
<tr>
<td><div>F. Scott Fitzgerald</div></td>
<td><div><em>The Great Gatsby</em></div></td>
<td class="number"><div>1925</div></td>
</tr>
<tr>
<td><div>George Orwell</div></td>
<td><div><em>Nineteen Eighty-Four</em></div></td>
<td class="number"><div>1948</div></td>
</tr>
<tr>
<td><div>Peter Weiss</div></td>
<td><div><em>The Persecution and Assassination of Jean-Paul Marat as Performed by the Inmates of the Asylum of Charenton Under the Direction of the Marquis de Sade</em></div></td>
<td class="number"><div>1963</div></td>
</tr>
<tr>
<td><div>William Goldman</div></td>
<td><div><em>The Princess Bride: S. Morgenstern's Classic Tale of True Love and High Adventure</em></div></td>
<td class="number"><div>1973</div></td>
</tr>
</tbody>
</table>
<h2>With Scroll</h2>
<table id="Books-scroll" class="scroll">
<colgroup>
<col>
<col>
<col class="number">
</colgroup>
<thead>
<tr>
<th>Author</th>
<th>Title</th>
<th class="number">Year</th>
</tr>
</thead>
<tbody>
<tr>
<td><div>Homer</div></td>
<td><div><em>Iliad</em></div></td>
<td class="number"><div>BC ~800</div></td>
</tr>
<tr>
<td><div>Miguel De Cervantes</div></td>
<td><div ><em>The Ingenious Gentleman Don Quixote of La Mancha</em></div></td>
<td class="number"><div>1605</div></td>
</tr>
<tr>
<td><div>Mary Shelley</div></td>
<td><div><em>Frankenstein; or, The Modern Prometheus</em></div></td>
<td class="number"><div>1818</div></td>
</tr>
<tr>
<td><div>Herman Melville</div></td>
<td><div><em>Moby-Dick; or, The Whale</em></div></td>
<td class="number"><div>1851</div></td>
</tr>
<tr>
<td><div>Emma Dorothy Eliza Nevitte Southworth</div></td>
<td><div><em>The Hidden Hand</em></div></td>
<td class="number"><div>1888</div></td>
</tr>
<tr>
<td><div>F. Scott Fitzgerald</div></td>
<td><div><em>The Great Gatsby</em></div></td>
<td class="number"><div>1925</div></td>
</tr>
<tr>
<td><div>George Orwell</div></td>
<td><div><em>Nineteen Eighty-Four</em></div></td>
<td class="number"><div>1948</div></td>
</tr>
<tr>
<td><div>Peter Weiss</div></td>
<td><div><em>The Persecution and Assassination of Jean-Paul Marat as Performed by the Inmates of the Asylum of Charenton Under the Direction of the Marquis de Sade</em></div></td>
<td class="number"><div>1963</div></td>
</tr>
<tr>
<td><div>William Goldman</div></td>
<td><div><em>The Princess Bride: S. Morgenstern's Classic Tale of True Love and High Adventure</em></div></td>
<td class="number"><div>1973</div></td>
</tr>
</tbody>
</table>
<p>
This is an example for my post <cite><a href="http://adrianroselli.com/2016/02/keyboard-and-overflow.html">Keyboard and Overflow</a></cite>. That link also acts a handy tab-stop to see where you are as you finish playing.
</p>
</main>
@import url(https://fonts.googleapis.com/css?family=Lato:400,700);
body {
background-color: #6D695C;
background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAACVBMVEUAAAAAAAAAAACDY+nAAAAAA3RSTlMmDQBzGIDBAAAAG0lEQVR42uXIIQEAAADCMHj/0NdkQMws0HEeAqvwAUGJthrXAAAAAElFTkSuQmCC);
font-size: 100%;
color: #333;
font-family: Lato, Arial, sans-serif;
padding: 0;
margin: 0;
}
main {
display: block;
box-sizing: border-box;
/*width: 90%;
margin: 1em auto;
padding: 1em 2em;*/
color: #000;
background-color: rgba(204,204,204,.7);
border: .07em solid rgba(0,0,0,.5);
border-radius: .5em;
}
table {
/*border: 1px dotted #00f;*/
margin: 1em 0;
border-collapse: collapse;
width: 100%;
}
th, td {
/*padding: .25em .5em .25em 1em;*/
/*border: 1px dotted #0f0;*/
vertical-align: text-top;
text-align: left;
/*text-indent: -.5em;*/
}
tr:nth-child(even) {
background-color: rgba(255,255,255,.25);
}
tr:nth-child(odd) {
background-color: rgba(0,0,0,.1);
}
th {
vertical-align: bottom;
background-color: rgba(0,0,0,.5);
color: #fff;
font-weight: bold;
}
td.right, th.right, td.number, th.number/*, col.number || td, col.right || td CSS4 table col selector */ {
text-align: right;
}
/* Experimental styles */
th {
padding: .25em 1vw;
}
td:nth-of-type(1) {
/*width: 25%;*/
}
td:nth-of-type(1) div {
width: 12em;
width: 20vw;
}
td:nth-of-type(2) {
/*width: 65%;*/
}
td:nth-of-type(2) div {
width: 20em;
width: 60vw;
}
td:nth-of-type(3) {
/*width: 10%;*/
}
td:nth-of-type(23) div {
width: 12vw;
}
td {
position: relative;
min-height: 1em;
padding: 0;
text-indent: 0;
}
td div {
box-sizing: border-box;
/*height: 1.7em;*/
/*width: 100%;*/
/*max-width: 10em;*/ /* apparently i need a set size, not a % */
/*width: calc(100%/2);*/
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
/*display: block;*/
margin: 0;
padding: 0;
/*outline: 1px dotted #f00;*/
padding: .25em .5vw .25em 1vw;
text-indent: -.5vw;
/*display: inline;*/
}
.scroll td div {
overflow: scroll;
text-overflow: initial;
white-space: normal;
}
.ellipsis td div:focus, .ellipsis td div:hover {
height: auto;
position: absolute;
width: 100%;
max-width: 100%;
white-space: normal;
overflow: visible;
text-overflow: initial;
z-index: 1;
outline: 1px solid #999;
}
.scroll td div, .scroll td div:focus, .scroll td div:hover {
overflow: auto;
height: 2em;
}
.scroll td div:focus, .scroll td div:hover {
outline: 1px solid #999;
}
tr:nth-child(even), tr:nth-child(even) div {
background-color: #ccc;
}
tr:nth-child(odd),tr:nth-child(odd) div {
background-color: #ddd;
}
main {
position: relative;
}
main {
width: auto;
padding: 1em 2vw;
margin: 1em 2vw;
}
/*
2 | 2 main 2 | 2 == 8
0 | 0 table 0 | 0 == 0
0 | 0 td 0 | 0 == 0
cols have 100 - 8 = 92 to split by three...
20, 60, 12
0 | 1 div .5 | 0 == 1.5 x 3 == 4.5
*/
// Checking to see if there is probably an ellipsis
function CheckOverflow(aDiv) {
try{
eID = aDiv;
// There is no way to test for presense of ellipsis, so we
// compare the width/height with the clipped width/height
if (eID.scrollWidth > eID.offsetWidth || eID.scrollHeight > eID.offsetHeight) {
// element probably has ellipsis
// console.log('yep!');
return true;
} else {
// element probably does not overflow
}
} catch(e) {
console.log('CheckOverflow(): ' + e);
}
}
// Adding accessibility attributes
function AddKbdAttrs(aDiv) {
try{
// Get the element with the passed ID
//eID = document.getElementById(divID);
eID = aDiv;
//eID.style.backgroundColor = '#0f0';
// Give the element a tabindex=0 so it has a tab stop
eID.setAttribute('tabindex', '0');
// Give it a role so screen readers know this is a thing
eID.setAttribute('role', 'region');
// Now give it a label so screen readers know why it's a thing
eID.setAttribute('aria-label', 'Text that visually overflows.');
} catch(e) {
console.log('AddKbdAttrs(): ' + e);
}
}
// Find elements within a given container and see if they are candidates
// to have content overflowing with an ellipsis, then add the appropriate
// accessibility attributes for keyboard users that also keep screen
// reader users from getting an aural assault
function PossibleOverflows(containerID) {
try{
// Get the element with the passed ID
// I do this to reduce the number of nodes to traverse
// To-do: Modify function to use document root if blank
var eID = document.getElementById(containerID);
// Get all the elements that match the selector
// You could put your own in here to reduce the resultant node list
var matches = eID.querySelectorAll('div');
// Return the node list count
// console.log(matches.length);
// Now loop
for( i=0; i < matches.length; i++ ) {
var match = matches[i];
// Get the rendered style of each
var computedStyle = window.getComputedStyle(match, null);
// Now get the overflow property
var computedOverflow = computedStyle.getPropertyValue('overflow');
//console.log(computedOverflow);
// If it is hidden, do stuff
if (computedOverflow === 'hidden') {
// Now identify if it is set to use an ellipsis
var hasEllipsis = computedStyle.getPropertyValue('text-overflow') === 'ellipsis';
// Now check if this matches
//console.log(window.getComputedStyle(match, null).textOverflow);
if (hasEllipsis) {
// Now check it against my ellipsis function
var anyEllipsis = CheckOverflow(match);
// If the function says it's ellipsising, call the function to add attrs
if (anyEllipsis === true) {
// Call function to add attributes
AddKbdAttrs(match);
}
}
} else if (computedOverflow === 'scroll' || computedOverflow === 'auto') {
// Now identify if the overflow is scrolling (auto, scroll, scroll-x, scroll-y)
//console.log('foo');
var probablyScroll = CheckOverflow(match);
if (probablyScroll === true) {
// Call function to add attributes
AddKbdAttrs(match);
}
}
}
} catch(e) {
console.log('PossibleOverflows(): ' + e);
}
}
//PossibleOverflows('Books-ellipsis');
//PossibleOverflows('Books-scroll');
window.onload = PossibleOverflows('Books-ellipsis');
window.onload = PossibleOverflows('Books-scroll');
//window.onresize = PossibleOverflows('Books-ellipsis');
//window.onresize = PossibleOverflows('Books-scroll');
Also see: Tab Triggers