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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
import Foundation
import Common
import Down
import UIKit
class CustomStyler: DownStyler {
// NOTE: The content is produced by an LLM; generated links may be unsafe or unreachable.
// To keep the MVP safe, link rendering is disabled.
override func style(link str: NSMutableAttributedString, title: String?, url: String?) {}
override func style(image str: NSMutableAttributedString, title: String?, url: String?) {}
}
struct SummaryFormatter {
private struct UX {
static let headingSpacing: CGFloat = 16.0
static let bodySpacing: CGFloat = 8.0
static let listItemTopSpacing: CGFloat = 2.0
static let listItemBottomSpacing: CGFloat = 4.0
}
let theme: any Theme
func format(markdown: String) -> NSAttributedString? {
let formatter = Down(markdownString: markdown)
return try? formatter.toAttributedString(
styler: CustomStyler(
configuration: makeConfiguration()
)
)
}
private func makeConfiguration() -> DownStylerConfiguration {
let heading5Style = NSMutableParagraphStyle()
heading5Style.alignment = .center
heading5Style.paragraphSpacingBefore = UX.headingSpacing
let bodyStyle = NSMutableParagraphStyle()
bodyStyle.paragraphSpacing = UX.bodySpacing
let heading6Style = NSMutableParagraphStyle()
heading6Style.paragraphSpacing = UX.headingSpacing
heading6Style.paragraphSpacingBefore = 0
let heading2Style = NSMutableParagraphStyle()
heading2Style.paragraphSpacing = UX.headingSpacing
heading2Style.paragraphSpacingBefore = UX.bodySpacing
var paragraphStyle = StaticParagraphStyleCollection()
paragraphStyle.heading5 = heading5Style
paragraphStyle.body = bodyStyle
paragraphStyle.heading6 = heading6Style
paragraphStyle.heading2 = heading2Style
let textColor = theme.colors.textPrimary
return DownStylerConfiguration(
fonts: StaticFontCollection(
heading1: FXFontStyles.Regular.title1.scaledFont(),
heading2: FXFontStyles.Regular.title2.scaledFont(),
heading3: FXFontStyles.Regular.title3.scaledFont(),
heading4: FXFontStyles.Regular.headline.scaledFont(),
heading5: FXFontStyles.Regular.footnote.scaledFont(),
heading6: FXFontStyles.Regular.caption2.scaledFont(),
body: FXFontStyles.Regular.body.scaledFont(),
code: FXFontStyles.Regular.body.monospacedFont(),
listItemPrefix: FXFontStyles.Regular.body.scaledFont()
),
colors: StaticColorCollection(
heading1: textColor,
heading2: textColor,
heading3: textColor,
heading4: textColor,
heading5: theme.colors.textSecondary,
heading6: theme.colors.textSecondary,
body: textColor,
code: textColor,
link: textColor,
quote: textColor,
quoteStripe: textColor,
thematicBreak: textColor,
listItemPrefix: textColor,
codeBlockBackground: .clear
),
paragraphStyles: paragraphStyle,
listItemOptions: ListItemOptions(
spacingAbove: UX.listItemTopSpacing,
spacingBelow: UX.listItemBottomSpacing
)
)
}
}