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+ pv (percent of view) parameter #31

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+ pv (percent of view) parameter #31

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25 changes: 19 additions & 6 deletions jquery.visible.js
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@
* only accounts for vertical position, not horizontal.
*/
var $w = $(window);
$.fn.visible = function(partial,hidden,direction){
$.fn.visible = function(partial,hidden,direction,pv){

if (this.length < 1)
return;
Expand All @@ -21,16 +21,24 @@
vpWidth = $w.width(),
vpHeight = $w.height(),
direction = (direction) ? direction : 'both',
clientSize = hidden === true ? t.offsetWidth * t.offsetHeight : true;
clientSize = hidden === true ? t.offsetWidth * t.offsetHeight : true,
pvh = 0,
pvw = 0;

if (pv > 0) {
pvh = $t.height()*pv/100;
pvw = $t.width()*pv/100;
}


if (typeof t.getBoundingClientRect === 'function'){

// Use this native browser method, if available.
var rec = t.getBoundingClientRect(),
tViz = rec.top >= 0 && rec.top < vpHeight,
bViz = rec.bottom > 0 && rec.bottom <= vpHeight,
lViz = rec.left >= 0 && rec.left < vpWidth,
rViz = rec.right > 0 && rec.right <= vpWidth,
tViz = (rec.top + pvh) >= 0 && (rec.top + pvh) < vpHeight,
bViz = (rec.bottom - pvh) > 0 && (rec.bottom - pvh) <= vpHeight,
lViz = (rec.left + pvw) >= 0 && (rec.left + pvw) < vpWidth,
rViz = (rec.right - pvw) > 0 && (rec.right - pvw) <= vpWidth,
vVisible = partial ? tViz || bViz : tViz && bViz,
hVisible = partial ? lViz || rViz : lViz && rViz;

Expand All @@ -56,6 +64,11 @@
compareLeft = partial === true ? _right : _left,
compareRight = partial === true ? _left : _right;

compareTop = compareTop + pvh;
compareBottom = compareBottom - pvh;
compareRight = compareRight - pvw;
compareLeft = compareLeft + pvw;

if(direction === 'both')
return !!clientSize && ((compareBottom <= viewBottom) && (compareTop >= viewTop)) && ((compareRight <= viewRight) && (compareLeft >= viewLeft));
else if(direction === 'vertical')
Expand Down