118 lines
4.1 KiB
Swift
118 lines
4.1 KiB
Swift
//
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// Copyright 2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import SignalServiceKit
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extension ImageEditorViewController {
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func updateStrokeWidthSliderValue() {
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strokeWidthSlider.value = strokeWidthValues[currentStrokeType] ?? 1
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updateStrokeWidthPreviewSize()
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}
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private func setupStrokeWidthPreviewIfNecessary() {
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guard strokeWidthSliderIsTrackingObservation == nil else { return }
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view.addSubview(strokeWidthPreviewDot)
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strokeWidthPreviewDot.autoHCenterInSuperview()
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strokeWidthPreviewDot.autoVCenterInSuperview()
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strokeWidthSliderIsTrackingObservation = strokeWidthSlider.observe(\.isTracking, options: [.new]) { [weak self] _, _ in
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self?.updateStrokeWidthPreviewVisibility()
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}
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updateStrokeWidthPreviewVisibility()
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}
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private func updateStrokeWidthPreviewVisibility() {
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strokeWidthPreviewDot.alpha = strokeWidthSlider.isTracking ? 1 : 0
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}
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func updateStrokeWidthPreviewSize() {
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guard let strokeWidthPreviewDotSize = strokeWidthPreviewDotSize else { return }
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let unitStrokeWidth = currentStrokeUnitWidth()
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let viewSize = imageEditorView.gestureReferenceView.bounds.size
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let strokeWidth = ImageEditorStrokeItem.strokeWidth(forUnitStrokeWidth: unitStrokeWidth,
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dstSize: viewSize)
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var dotSize = max(strokeWidth, 1)
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if currentStrokeType != .blur {
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dotSize += 2 * strokeWidthPreviewDot.layer.borderWidth
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}
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strokeWidthPreviewDotSize.constant = dotSize
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}
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func updateStrokeWidthPreviewColor() {
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switch currentStrokeType {
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case .pen: strokeWidthPreviewDot.backgroundColor = model.color.color
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case .highlighter: strokeWidthPreviewDot.backgroundColor = model.color.color.withAlphaComponent(Self.highligherStrokeOpacity)
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case .blur: strokeWidthPreviewDot.backgroundColor = .white
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}
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}
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@objc
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func strokeTypeButtonTapped(sender: UIButton) {
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owsAssertDebug(currentStroke == nil)
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drawToolbar.strokeTypeButton.isSelected = !drawToolbar.strokeTypeButton.isSelected
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currentStrokeType = drawToolbar.strokeTypeButton.isSelected ? .highlighter : .pen
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}
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@objc
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func handleSliderContainerTap(_ gesture: UITapGestureRecognizer) {
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setStrokeWidthSlider(revealed: !strokeWidthSliderRevealed)
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// Hide slider after delay if user doesn't interact with it.
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if strokeWidthSliderRevealed {
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owsAssertDebug(hideStrokeWidthSliderTimer == nil)
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hideStrokeWidthSliderTimer = Timer.scheduledTimer(withTimeInterval: 2, repeats: false) { [weak self] _ in
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guard let self = self else { return }
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self.setStrokeWidthSlider(revealed: false)
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}
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}
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}
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@objc
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func handleSliderTouchEvents(slider: UISlider) {
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guard slider.isTracking != strokeWidthSliderRevealed else { return }
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setStrokeWidthSlider(revealed: slider.isTracking)
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}
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@objc
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func handleSliderValueChanged(slider: UISlider) {
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strokeWidthValues[currentStrokeType] = slider.value
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updateStrokeWidthPreviewSize()
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}
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func setStrokeWidthSlider(revealed: Bool) {
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guard strokeWidthSliderRevealed != revealed else { return }
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strokeWidthSliderRevealed = revealed
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updateStrokeWidthSliderPosition()
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if strokeWidthSliderRevealed {
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setupStrokeWidthPreviewIfNecessary()
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}
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if let timer = hideStrokeWidthSliderTimer {
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timer.invalidate()
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hideStrokeWidthSliderTimer = nil
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}
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}
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private func updateStrokeWidthSliderPosition() {
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strokeWidthSliderPosition?.constant = strokeWidthSliderRevealed
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? strokeWidthSliderContainer.bounds.height/2 - 12
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: 0
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UIView.animate(withDuration: 0.2) {
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if !self.strokeWidthSliderRevealed {
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self.strokeWidthPreviewDot.alpha = 0
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}
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self.view.setNeedsLayout()
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self.view.layoutIfNeeded()
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}
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}
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}
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