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@rafiki270
rafiki270 committed May 31, 2018
1 parent f9c149c commit f76fb30
Showing 1 changed file with 86 additions and 71 deletions.
157 changes: 86 additions & 71 deletions TheGrid/Grid view/Extensions/GridView+Layout.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -30,81 +30,13 @@ extension GridView {
func layout(_ subview: Subview) {
subview.view.snp.remakeConstraints { (make) in
// Top
if let vertical = subview.properties.vertical {
func set(vertical: Vertical) {
switch vertical.storage {
case .exactly(fromTop: let top):
make.top.equalTo(top + config.padding.value.top)
case .match(let view, margin: let margin):
make.top.equalTo(view).offset(margin)
case .below(let view, margin: let margin):
make.top.equalTo(view.snp.bottom).offset(margin)
case .above(let view, margin: let margin):
make.bottom.equalTo(view.snp.top).offset(-margin)
case .row(let views, margin: let margin):
for view in views {
make.top.greaterThanOrEqualTo(view.snp.bottom).offset(margin)
}
case .custom(let closure):
set(vertical: closure(traitCollection))
}
}
set(vertical: vertical)
} else {
make.top.greaterThanOrEqualTo(config.padding.value.top)
}
self.make(subview, top: make)

// Left
func setLeft(position: Position) {
let leftPadding = subview.properties.padding.value.left
switch position.storage {
case .col(let column):
let left = (self.x(column) + leftPadding)
make.left.equalTo(left)
case .reversed(let column):
let left = (self.x((config.numberOfColumns - column)) + leftPadding)
make.left.equalTo(left)
case .last:
make.width.equalTo(self.x(config.numberOfColumns - 1))
case .dynamic:
break
case .match(let view, margin: let margin):
make.left.equalTo(view).offset(margin + leftPadding)
case .relation(let view, margin: let margin):
make.left.equalTo(view.snp.right).offset(margin + leftPadding)
case .custom(let closure):
setLeft(position: closure(traitCollection))
}
}
setLeft(position: subview.properties.from)
self.make(subview, left: make)

// Right
func setRight(position: Position) {
let rightPadding = subview.properties.padding.value.right
let fullRightPadding = -(rightPadding + config.padding.value.right)
switch position.storage {
case .col(let column):
if column >= 0 && column < config.numberOfColumns { // Defined column
let col = config.numberOfColumns - (config.numberOfColumns - column)
make.width.equalTo((CGFloat(col) * config.columnWidth) - rightPadding)
} else {
make.right.equalTo(fullRightPadding)
}
case .reversed(let column):
make.right.equalTo(fullRightPadding - (CGFloat(column) * config.columnWidth))
case .last:
make.right.equalTo(fullRightPadding)
case .dynamic:
break
case .match(let view, margin: let margin):
make.right.equalTo(view).offset(margin - rightPadding)
case .relation(let view, margin: let margin):
make.right.equalTo(view.snp.left).offset(margin - rightPadding)
case .custom(let closure):
setRight(position: closure(traitCollection))
}
}
setRight(position: subview.properties.space)
self.make(subview, right: make)

// Dynamic size
if config.autoDynamicVertically {
Expand All @@ -119,4 +51,87 @@ extension GridView {
}
}

/// Build top constraints
private func make(_ subview: Subview, top make: ConstraintMaker) {
if let vertical = subview.properties.vertical {
func set(vertical: Vertical) {
switch vertical.storage {
case .exactly(fromTop: let top):
make.top.equalTo(top + config.padding.value.top)
case .match(let view, margin: let margin):
make.top.equalTo(view).offset(margin)
case .below(let view, margin: let margin):
make.top.equalTo(view.snp.bottom).offset(margin)
case .above(let view, margin: let margin):
make.bottom.equalTo(view.snp.top).offset(-margin)
case .row(let views, margin: let margin):
for view in views {
make.top.greaterThanOrEqualTo(view.snp.bottom).offset(margin)
}
case .custom(let closure):
set(vertical: closure(traitCollection))
}
}
set(vertical: vertical)
} else {
make.top.greaterThanOrEqualTo(config.padding.value.top)
}
}

/// Build left constraints
private func make(_ subview: Subview, left make: ConstraintMaker) {
func setLeft(position: Position) {
let leftPadding = subview.properties.padding.value.left
switch position.storage {
case .col(let column):
let left = (self.x(column) + leftPadding)
make.left.equalTo(left)
case .reversed(let column):
let left = (self.x((config.numberOfColumns - column)) + leftPadding)
make.left.equalTo(left)
case .last:
make.width.equalTo(self.x(config.numberOfColumns - 1))
case .dynamic:
break
case .match(let view, margin: let margin):
make.left.equalTo(view).offset(margin + leftPadding)
case .relation(let view, margin: let margin):
make.left.equalTo(view.snp.right).offset(margin + leftPadding)
case .custom(let closure):
setLeft(position: closure(traitCollection))
}
}
setLeft(position: subview.properties.from)
}

/// Build right constraints
private func make(_ subview: Subview, right make: ConstraintMaker) {
func setRight(position: Position) {
let rightPadding = subview.properties.padding.value.right
let fullRightPadding = -(rightPadding + config.padding.value.right)
switch position.storage {
case .col(let column):
if column >= 0 && column < config.numberOfColumns { // Defined column
let col = config.numberOfColumns - (config.numberOfColumns - column)
make.width.equalTo((CGFloat(col) * config.columnWidth) - rightPadding)
} else {
make.right.equalTo(fullRightPadding)
}
case .reversed(let column):
make.right.equalTo(fullRightPadding - (CGFloat(column) * config.columnWidth))
case .last:
make.right.equalTo(fullRightPadding)
case .dynamic:
break
case .match(let view, margin: let margin):
make.right.equalTo(view).offset(margin - rightPadding)
case .relation(let view, margin: let margin):
make.right.equalTo(view.snp.left).offset(margin - rightPadding)
case .custom(let closure):
setRight(position: closure(traitCollection))
}
}
setRight(position: subview.properties.space)
}

}

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