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generatePagesArray: function(currentPage, collectionLength, rowsPerPage, paginationRange) | |
{ | |
var pages = []; | |
var totalPages = Math.ceil(collectionLength / rowsPerPage); | |
var halfWay = Math.ceil(paginationRange / 2); | |
var position; | |
if (currentPage <= halfWay) { | |
position = 'start'; | |
} else if (totalPages - halfWay < currentPage) { | |
position = 'end'; | |
} else { | |
position = 'middle'; | |
} | |
var ellipsesNeeded = paginationRange < totalPages; | |
var i = 1; | |
while (i <= totalPages && i <= paginationRange) { | |
var pageNumber = this.calculatePageNumber(i, currentPage, paginationRange, totalPages); | |
var openingEllipsesNeeded = (i === 2 && (position === 'middle' || position === 'end')); | |
var closingEllipsesNeeded = (i === paginationRange - 1 && (position === 'middle' || position === 'start')); | |
if (ellipsesNeeded && (openingEllipsesNeeded || closingEllipsesNeeded)) { | |
pages.push('...'); | |
} else { | |
pages.push(pageNumber); | |
} | |
i ++; | |
} | |
return pages; | |
}, | |
calculatePageNumber: function(i, currentPage, paginationRange, totalPages) | |
{ | |
var halfWay = Math.ceil(paginationRange/2); | |
if (i === paginationRange) { | |
return totalPages; | |
} else if (i === 1) { | |
return i; | |
} else if (paginationRange < totalPages) { | |
if (totalPages - halfWay < currentPage) { | |
return totalPages - paginationRange + i; | |
} else if (halfWay < currentPage) { | |
return currentPage - halfWay + i; | |
} else { | |
return i; | |
} | |
} else { | |
return i; | |
} | |
} |
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