element-x-ios/ElementX/Sources/Screens/RoomScreen/View/Timeline/FormattedBodyText.swift

89 lines
3.1 KiB
Swift

//
// Copyright 2022 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import Foundation
import SwiftUI
struct FormattedBodyText: View {
let attributedComponents: [AttributedStringBuilderComponent]
var body: some View {
VStack(alignment: .leading, spacing: 8.0) {
ForEach(attributedComponents, id: \.self) { component in
if component.isBlockquote {
HStack(spacing: 4.0) {
Rectangle()
.foregroundColor(Color.red)
.frame(width: 4.0)
Text(component.attributedString)
.fixedSize(horizontal: false, vertical: true)
.foregroundColor(.element.primaryContent)
}
} else {
Text(component.attributedString)
.fixedSize(horizontal: false, vertical: true)
.foregroundColor(.element.primaryContent)
}
}
}
.tint(.element.accent)
}
}
struct FormattedBodyText_Previews: PreviewProvider {
static var previews: some View {
body.preferredColorScheme(.light)
body.preferredColorScheme(.dark)
}
@ViewBuilder
static var body: some View {
let htmlStrings = [
"""
Text before blockquote
<blockquote>
<b>bold</b> <i>italic</i>
</blockquote>
Text after blockquote
""",
"""
<blockquote>First blockquote with a <a href=\"https://www.matrix.org/\">link</a> in it</blockquote>
<blockquote>Second blockquote with a <a href=\"https://www.matrix.org/\">link</a> in it</blockquote>
<blockquote>Third blockquote with a <a href=\"https://www.matrix.org/\">link</a> in it</blockquote>
""",
"""
<code>Hello world</code>
<p>Text</p>
<code><b>Hello</b> <i>world</i></code>
<p>Text</p>
<code>Hello world</code>
"""
]
let attributedStringBuilder = AttributedStringBuilder()
VStack(alignment: .leading, spacing: 24.0) {
ForEach(htmlStrings, id: \.self) { htmlString in
let attributedString = attributedStringBuilder.fromHTML(htmlString)
if let components = attributedStringBuilder.blockquoteCoalescedComponentsFrom(attributedString) {
FormattedBodyText(attributedComponents: components)
.fixedSize()
}
}
}
}
}