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position.js
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position.js
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angular.module('ui.bootstrap.position', [])
/**
* A set of utility methods that can be use to retrieve position of DOM elements.
* It is meant to be used where we need to absolute-position DOM elements in
* relation to other, existing elements (this is the case for tooltips, popovers,
* typeahead suggestions etc.).
*/
.factory('$uibPosition', ['$document', '$window', function($document, $window) {
function getStyle(el, cssprop) {
if (el.currentStyle) { //IE
return el.currentStyle[cssprop];
} else if ($window.getComputedStyle) {
return $window.getComputedStyle(el)[cssprop];
}
// finally try and get inline style
return el.style[cssprop];
}
/**
* Checks if a given element is statically positioned
* @param element - raw DOM element
*/
function isStaticPositioned(element) {
return (getStyle(element, 'position') || 'static' ) === 'static';
}
/**
* returns the closest, non-statically positioned parentOffset of a given element
* @param element
*/
var parentOffsetEl = function(element) {
var docDomEl = $document[0];
var offsetParent = element.offsetParent || docDomEl;
while (offsetParent && offsetParent !== docDomEl && isStaticPositioned(offsetParent) ) {
offsetParent = offsetParent.offsetParent;
}
return offsetParent || docDomEl;
};
return {
/**
* Provides read-only equivalent of jQuery's position function:
* http://api.jquery.com/position/
*/
position: function(element) {
var elBCR = this.offset(element);
var offsetParentBCR = { top: 0, left: 0 };
var offsetParentEl = parentOffsetEl(element[0]);
if (offsetParentEl != $document[0]) {
offsetParentBCR = this.offset(angular.element(offsetParentEl));
offsetParentBCR.top += offsetParentEl.clientTop - offsetParentEl.scrollTop;
offsetParentBCR.left += offsetParentEl.clientLeft - offsetParentEl.scrollLeft;
}
var boundingClientRect = element[0].getBoundingClientRect();
return {
width: boundingClientRect.width || element.prop('offsetWidth'),
height: boundingClientRect.height || element.prop('offsetHeight'),
top: elBCR.top - offsetParentBCR.top,
left: elBCR.left - offsetParentBCR.left
};
},
/**
* Provides read-only equivalent of jQuery's offset function:
* http://api.jquery.com/offset/
*/
offset: function(element) {
var boundingClientRect = element[0].getBoundingClientRect();
return {
width: boundingClientRect.width || element.prop('offsetWidth'),
height: boundingClientRect.height || element.prop('offsetHeight'),
top: boundingClientRect.top + ($window.pageYOffset || $document[0].documentElement.scrollTop),
left: boundingClientRect.left + ($window.pageXOffset || $document[0].documentElement.scrollLeft)
};
},
/**
* Provides coordinates for the targetEl in relation to hostEl
*/
positionElements: function(hostEl, targetEl, positionStr, appendToBody) {
var positionStrParts = positionStr.split('-');
var pos0 = positionStrParts[0], pos1 = positionStrParts[1] || 'center';
var hostElPos,
targetElWidth,
targetElHeight,
targetElPos;
hostElPos = appendToBody ? this.offset(hostEl) : this.position(hostEl);
targetElWidth = targetEl.prop('offsetWidth');
targetElHeight = targetEl.prop('offsetHeight');
var shiftWidth = {
center: function() {
return hostElPos.left + hostElPos.width / 2 - targetElWidth / 2;
},
left: function() {
return hostElPos.left;
},
right: function() {
return hostElPos.left + hostElPos.width;
}
};
var shiftHeight = {
center: function() {
return hostElPos.top + hostElPos.height / 2 - targetElHeight / 2;
},
top: function() {
return hostElPos.top;
},
bottom: function() {
return hostElPos.top + hostElPos.height;
}
};
switch (pos0) {
case 'right':
targetElPos = {
top: shiftHeight[pos1](),
left: shiftWidth[pos0]()
};
break;
case 'left':
targetElPos = {
top: shiftHeight[pos1](),
left: hostElPos.left - targetElWidth
};
break;
case 'bottom':
targetElPos = {
top: shiftHeight[pos0](),
left: shiftWidth[pos1]()
};
break;
default:
targetElPos = {
top: hostElPos.top - targetElHeight,
left: shiftWidth[pos1]()
};
break;
}
return targetElPos;
}
};
}]);
/* Deprecated position below */
angular.module('ui.bootstrap.position')
.value('$positionSuppressWarning', false)
.service('$position', ['$log', '$positionSuppressWarning', '$uibPosition', function($log, $positionSuppressWarning, $uibPosition) {
if (!$positionSuppressWarning) {
$log.warn('$position is now deprecated. Use $uibPosition instead.');
}
angular.extend(this, $uibPosition);
}]);