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{getOuterSize, getBounds, getSize, extend, updateClasses, defer} = @Tether.Utils
MIRROR_ATTACH =
left: 'right'
right: 'left'
top: 'bottom'
bottom: 'top'
middle: 'middle'
BOUNDS_FORMAT = ['left', 'top', 'right', 'bottom']
getBoundingRect = (tether, to) ->
if to is 'scrollParent'
to = tether.scrollParent
else if to is 'window'
to = [pageXOffset, pageYOffset, innerWidth + pageXOffset, innerHeight + pageYOffset]
if to is document
to = to.documentElement
if to.nodeType?
pos = size = getBounds to
style = getComputedStyle to
to = [pos.left, pos.top, size.width + pos.left, size.height + pos.top]
for side, i in BOUNDS_FORMAT
side = side[0].toUpperCase() + side.substr(1)
if side in ['Top', 'Left']
to[i] += parseFloat style["border#{ side }Width"]
else
to[i] -= parseFloat style["border#{ side }Width"]
to
@Tether.modules.push
position: ({top, left, targetAttachment}) ->
return true unless @options.constraints
removeClass = (prefix) =>
@removeClass prefix
for side in BOUNDS_FORMAT
@removeClass "#{ prefix }-#{ side }"
{height, width} = @cache 'element-bounds', => getBounds @element
if width is 0 and height is 0 and @lastSize?
# Handle the item getting hidden as a result of our positioning without glitching
# the classes in and out
{width, height} = @lastSize
targetSize = @cache 'target-bounds', => @getTargetBounds()
targetHeight = targetSize.height
targetWidth = targetSize.width
tAttachment = {}
eAttachment = {}
allClasses = [@getClass('pinned'), @getClass('out-of-bounds')]
for constraint in @options.constraints
allClasses.push(constraint.outOfBoundsClass) if constraint.outOfBoundsClass
allClasses.push(constraint.pinnedClass) if constraint.pinnedClass
for cls in allClasses
for side in ['left', 'top', 'right', 'bottom']
allClasses.push "#{ cls }-#{ side }"
addClasses = []
tAttachment = extend {}, targetAttachment
eAttachment = extend {}, @attachment
for constraint in @options.constraints
{to, attachment, pin} = constraint
attachment ?= ''
if ' ' in attachment
[changeAttachY, changeAttachX] = attachment.split(' ')
else
changeAttachX = changeAttachY = attachment
bounds = getBoundingRect @, to
if changeAttachY in ['target', 'both']
if (top < bounds[1] and tAttachment.top is 'top')
top += targetHeight
tAttachment.top = 'bottom'
if (top + height > bounds[3] and tAttachment.top is 'bottom')
top -= targetHeight
tAttachment.top = 'top'
if changeAttachY is 'together'
if top < bounds[1] and tAttachment.top is 'top'
if eAttachment.top is 'bottom'
top += targetHeight
tAttachment.top = 'bottom'
top += height
eAttachment.top = 'top'
else if eAttachment.top is 'top'
top += targetHeight
tAttachment.top = 'bottom'
top -= height
eAttachment.top = 'bottom'
if top + height > bounds[3] and tAttachment.top is 'bottom'
if eAttachment.top is 'top'
top -= targetHeight
tAttachment.top = 'top'
top -= height
eAttachment.top = 'bottom'
else if eAttachment.top is 'bottom'
top -= targetHeight
tAttachment.top = 'top'
top += height
eAttachment.top = 'top'
if tAttachment.top is 'middle'
if top + height > bounds[3] and eAttachment.top is 'top'
top -= height
eAttachment.top = 'bottom'
else if top < bounds[1] and eAttachment.top is 'bottom'
top += height
eAttachment.top = 'top'
if changeAttachX in ['target', 'both']
if (left < bounds[0] and tAttachment.left is 'left')
left += targetWidth
tAttachment.left = 'right'
if (left + width > bounds[2] and tAttachment.left is 'right')
left -= targetWidth
tAttachment.left = 'left'
if changeAttachX is 'together'
if left < bounds[0] and tAttachment.left is 'left'
if eAttachment.left is 'right'
left += targetWidth
tAttachment.left = 'right'
left += width
eAttachment.left = 'left'
else if eAttachment.left is 'left'
left += targetWidth
tAttachment.left = 'right'
left -= width
eAttachment.left = 'right'
else if left + width > bounds[2] and tAttachment.left is 'right'
if eAttachment.left is 'left'
left -= targetWidth
tAttachment.left = 'left'
left -= width
eAttachment.left = 'right'
else if eAttachment.left is 'right'
left -= targetWidth
tAttachment.left = 'left'
left += width
eAttachment.left = 'left'
else if tAttachment.left is 'center'
if left + width > bounds[2] and eAttachment.left is 'left'
left -= width
eAttachment.left = 'right'
else if left < bounds[0] and eAttachment.left is 'right'
left += width
eAttachment.left = 'left'
if changeAttachY in ['element', 'both']
if (top < bounds[1] and eAttachment.top is 'bottom')
top += height
eAttachment.top = 'top'
if (top + height > bounds[3] and eAttachment.top is 'top')
top -= height
eAttachment.top = 'bottom'
if changeAttachX in ['element', 'both']
if (left < bounds[0] and eAttachment.left is 'right')
left += width
eAttachment.left = 'left'
if (left + width > bounds[2] and eAttachment.left is 'left')
left -= width
eAttachment.left = 'right'
if typeof pin is 'string'
pin = (p.trim() for p in pin.split ',')
else if pin is true
pin = ['top', 'left', 'right', 'bottom']
pin or= []
pinned = []
oob = []
if top < bounds[1]
if 'top' in pin
top = bounds[1]
pinned.push 'top'
else
oob.push 'top'
if top + height > bounds[3]
if 'bottom' in pin
top = bounds[3] - height
pinned.push 'bottom'
else
oob.push 'bottom'
if left < bounds[0]
if 'left' in pin
left = bounds[0]
pinned.push 'left'
else
oob.push 'left'
if left + width > bounds[2]
if 'right' in pin
left = bounds[2] - width
pinned.push 'right'
else
oob.push 'right'
if pinned.length
pinnedClass = @options.pinnedClass ? @getClass('pinned')
addClasses.push pinnedClass
for side in pinned
addClasses.push "#{ pinnedClass }-#{ side }"
if oob.length
oobClass = @options.outOfBoundsClass ? @getClass('out-of-bounds')
addClasses.push oobClass
for side in oob
addClasses.push "#{ oobClass }-#{ side }"
if 'left' in pinned or 'right' in pinned
eAttachment.left = tAttachment.left = false
if 'top' in pinned or 'bottom' in pinned
eAttachment.top = tAttachment.top = false
if tAttachment.top isnt targetAttachment.top or tAttachment.left isnt targetAttachment.left or eAttachment.top isnt @attachment.top or eAttachment.left isnt @attachment.left
@updateAttachClasses eAttachment, tAttachment
defer =>
updateClasses @target, addClasses, allClasses
updateClasses @element, addClasses, allClasses
{top, left}
|
