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refactored label to include lineheight and letterspacing

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Signed-off-by: Matt Bruce <matt.bruce@verizon.com>
This commit is contained in:
Matt Bruce 2022-08-16 16:11:07 -05:00
parent b4b1de52a2
commit aab0cd86ac
1 changed files with 43 additions and 14 deletions
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57
VDS/Components/Label/Label.swift
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@ -128,7 +128,7 @@ open class LabelBase<ModelType: LabelModel>: UILabel, ModelHandlerable, ViewProt
font = TypographicalStyle.defaultStyle.font
}
if let attributes = viewModel.attributes, let text = viewModel.text, let font = font, let textColor = textColor {
if let text = viewModel.text, let font = font, let textColor = textColor {
//clear the arrays holding actions
accessibilityCustomActions = []
actions = []
@ -136,23 +136,28 @@ open class LabelBase<ModelType: LabelModel>: UILabel, ModelHandlerable, ViewProt
//create the primary string
let startingAttributes = [NSAttributedString.Key.font: font, NSAttributedString.Key.foregroundColor: textColor]
let mutableText = NSMutableAttributedString(string: text, attributes: startingAttributes)
//set the local lineHeight/lineSpacing attributes
setStyleAttributes(viewModel: viewModel, attributedString: mutableText)
//loop through the models attributes
for attribute in attributes {
//add attribute on the string
attribute.setAttribute(on: mutableText)
//see if the attribute is Actionable
if let actionable = attribute as? any LabelAttributeActionable{
//create a accessibleAction
let customAccessibilityAction = customAccessibilityAction(range: actionable.range)
if let attributes = viewModel.attributes {
//loop through the models attributes
for attribute in attributes {
//create a wrapper for the attributes range, block and
actions.append(LabelAction(range: actionable.range, actionBlock: actionable.action, accessibilityID: customAccessibilityAction?.hashValue ?? -1))
//add attribute on the string
attribute.setAttribute(on: mutableText)
//see if the attribute is Actionable
if let actionable = attribute as? any LabelAttributeActionable{
//create a accessibleAction
let customAccessibilityAction = customAccessibilityAction(range: actionable.range)
//create a wrapper for the attributes range, block and
actions.append(LabelAction(range: actionable.range, actionBlock: actionable.action, accessibilityID: customAccessibilityAction?.hashValue ?? -1))
}
}
}
//only enabled if enabled and has actions
isUserInteractionEnabled = !viewModel.disabled && !actions.isEmpty
@ -162,6 +167,30 @@ open class LabelBase<ModelType: LabelModel>: UILabel, ModelHandlerable, ViewProt
text = viewModel.text
}
}
// MARK: - Private Attributes
private func setStyleAttributes(viewModel: ModelType, attributedString: NSMutableAttributedString) {
//get the range
let entireRange = NSRange(location: 0, length: attributedString.length)
//set letterSpacing
if viewModel.typograpicalStyle.letterSpacing > 0.0 {
attributedString.addAttribute(.kern, value: viewModel.typograpicalStyle.letterSpacing, range: entireRange)
}
//set lineHeight
if viewModel.typograpicalStyle.lineHeight > 0.0 {
let lineHeight = viewModel.typograpicalStyle.lineHeight
let adjustment = lineHeight > font.lineHeight ? 2.0 : 1.0
let baselineOffset = (lineHeight - font.lineHeight) / 2.0 / adjustment
let paragraph = NSMutableParagraphStyle().with {
$0.maximumLineHeight = lineHeight
$0.minimumLineHeight = lineHeight
}
attributedString.addAttribute(.baselineOffset, value: baselineOffset, range: entireRange)
attributedString.addAttribute( .paragraphStyle, value: paragraph, range: entireRange)
}
}
//--------------------------------------------------
// MARK: - Actionable