mirror of
https://github.com/vector-im/element-ios.git
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117 lines
4.3 KiB
Swift
117 lines
4.3 KiB
Swift
//
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// Copyright 2020 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import Foundation
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import Reusable
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protocol TextViewTableViewHeaderFooterViewDelegate: UITextViewDelegate {
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}
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class TextViewTableViewHeaderFooterView: UITableViewHeaderFooterView {
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// MARK - Private
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private var _textView: UITextView?
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private var textViewLeftConstraint: NSLayoutConstraint?
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private var textViewTopConstraint: NSLayoutConstraint?
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private var textViewRightConstraint: NSLayoutConstraint?
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private var textViewBottomConstraint: NSLayoutConstraint?
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// MARK - Public
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weak var delegate: TextViewTableViewHeaderFooterViewDelegate?
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var textViewInsets: UIEdgeInsets = UIEdgeInsets(top: 8, left: 16, bottom: 8, right: 16) {
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didSet {
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setNeedsUpdateConstraints()
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}
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}
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/// Will be created if accessed
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var textView: UITextView {
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// hide text label if textView accessed
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textLabel?.isHidden = true
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if let _textView = _textView {
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return _textView
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}
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let view = UITextView()
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view.backgroundColor = .clear
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view.translatesAutoresizingMaskIntoConstraints = false
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view.delegate = self
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view.isEditable = false
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view.isScrollEnabled = false
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view.scrollsToTop = false
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view.textContainerInset = .zero
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view.contentInset = .zero
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view.textContainer.lineFragmentPadding = 0
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contentView.addSubview(view)
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textViewLeftConstraint = view.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: textViewInsets.left)
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textViewTopConstraint = view.topAnchor.constraint(equalTo: contentView.topAnchor, constant: textViewInsets.top)
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textViewRightConstraint = contentView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: textViewInsets.right)
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textViewBottomConstraint = contentView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: textViewInsets.bottom)
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textViewLeftConstraint?.isActive = true
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textViewTopConstraint?.isActive = true
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textViewRightConstraint?.isActive = true
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textViewBottomConstraint?.isActive = true
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_textView = view
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return view
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}
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override func updateConstraints() {
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super.updateConstraints()
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textViewLeftConstraint?.constant = textViewInsets.left
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textViewTopConstraint?.constant = textViewInsets.top
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textViewRightConstraint?.constant = textViewInsets.right
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textViewBottomConstraint?.constant = textViewInsets.bottom
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}
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override func prepareForReuse() {
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super.prepareForReuse()
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textViewInsets = UIEdgeInsets(top: 8, left: 16, bottom: 8, right: 16)
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}
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}
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extension TextViewTableViewHeaderFooterView: Reusable { }
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extension TextViewTableViewHeaderFooterView: Themable {
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func update(theme: Theme) {
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contentView.backgroundColor = theme.headerBackgroundColor
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textLabel?.textColor = theme.textSecondaryColor
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_textView?.textColor = theme.textSecondaryColor
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_textView?.linkTextAttributes = [NSAttributedString.Key.foregroundColor: theme.tintColor]
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}
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}
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extension TextViewTableViewHeaderFooterView: UITextViewDelegate {
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func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
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return delegate?.textView?(textView, shouldInteractWith: URL, in: characterRange, interaction: interaction) ?? (interaction == .invokeDefaultAction)
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}
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func textViewDidChangeSelection(_ textView: UITextView) {
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return delegate?.textViewDidChangeSelection?(textView) ?? {
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textView.selectedRange = NSRange(location: 0, length: 0)
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}()
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}
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}
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