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Fix translation in all of editor view's gestures.

Browse Source
pull/2/head
Matthew Chen 6 years ago
parent 674cf2e01f
commit 7130895e3f
3 changed files with 53 additions and 72 deletions
Show Stats Download Patch File Download Diff File

35
SignalMessaging/Views/ImageEditor/ImageEditorCanvasView.swift
Unescape Escape View File

@ -531,41 +531,6 @@ public class ImageEditorCanvasView: UIView {
return result
}
// MARK: - Coordinates
public func locationUnit(forGestureRecognizer gestureRecognizer: UIGestureRecognizer,
transform: ImageEditorTransform) -> CGPoint {
return ImageEditorCanvasView.locationUnit(forGestureRecognizer: gestureRecognizer,
view: self.clipView,
transform: transform)
}
public class func locationUnit(forGestureRecognizer gestureRecognizer: UIGestureRecognizer,
view: UIView,
transform: ImageEditorTransform) -> CGPoint {
let locationInView = gestureRecognizer.location(in: view)
return locationUnit(forLocationInView: locationInView,
viewBounds: view.bounds,
transform: transform)
}
public func locationUnit(forLocationInView locationInView: CGPoint,
transform: ImageEditorTransform) -> CGPoint {
let viewBounds = self.clipView.bounds
return ImageEditorCanvasView.locationUnit(forLocationInView: locationInView,
viewBounds: viewBounds,
transform: transform)
}
public class func locationUnit(forLocationInView locationInView: CGPoint,
viewBounds: CGRect,
transform: ImageEditorTransform) -> CGPoint {
let affineTransformStart = transform.affineTransform(viewSize: viewBounds.size)
let locationInContent = locationInView.minus(viewBounds.center).applyingInverse(affineTransformStart).plus(viewBounds.center)
let locationUnit = locationInContent.toUnitCoordinates(viewSize: viewBounds.size, shouldClamp: false)
return locationUnit
}
// MARK: - Actions
// Returns nil on error.

12
SignalMessaging/Views/ImageEditor/ImageEditorCropViewController.swift
Unescape Escape View File

@ -588,18 +588,6 @@ class ImageEditorCropViewController: OWSViewController {
}
}
// MARK: - Coordinates
private func locationUnit(forGestureRecognizer gestureRecognizer: UIGestureRecognizer,
transform: ImageEditorTransform) -> CGPoint {
return ImageEditorCanvasView.locationUnit(forGestureRecognizer: gestureRecognizer, view: clipView, transform: transform)
}
private func locationUnit(forLocationInView locationInView: CGPoint,
transform: ImageEditorTransform) -> CGPoint {
return ImageEditorCanvasView.locationUnit(forLocationInView: locationInView, viewSize: clipView.bounds.size, transform: transform)
}
// MARK: - Events
@objc public func didTapBackButton() {

78
SignalMessaging/Views/ImageEditor/ImageEditorView.swift
Unescape Escape View File

@ -299,7 +299,7 @@ public class ImageEditorView: UIView {
}
let location = gestureRecognizer.location(in: canvasView.gestureReferenceView)
guard let textLayer = canvasView.textLayer(forLocation: location) else {
guard let textLayer = self.textLayer(forLocation: location) else {
return
}
@ -326,7 +326,7 @@ public class ImageEditorView: UIView {
switch gestureRecognizer.state {
case .began:
let pinchState = gestureRecognizer.pinchStateStart
guard let textLayer = canvasView.textLayer(forLocation: pinchState.centroid) else {
guard let textLayer = self.textLayer(forLocation: pinchState.centroid) else {
// The pinch needs to start centered on a text item.
return
}
@ -341,14 +341,20 @@ public class ImageEditorView: UIView {
return
}
let view = self.canvasView.gestureReferenceView
let viewBounds = view.bounds
let locationStart = gestureRecognizer.pinchStateStart.centroid
let locationUnitStart = locationUnit(forLocationInView: locationStart, transform: model.currentTransform())
let locationNow = gestureRecognizer.pinchStateLast.centroid
let locationUnitNow = locationUnit(forLocationInView: locationNow, transform: model.currentTransform())
let unitLocationDelta = CGPointSubtract(locationUnitNow,
locationUnitStart)
let unitCenter = CGPointClamp01(CGPointAdd(textItem.unitCenter, unitLocationDelta))
let gestureStartImageUnit = ImageEditorView.locationImageUnit(forLocationInView: locationStart,
viewBounds: viewBounds,
model: self.model,
transform: self.model.currentTransform())
let gestureNowImageUnit = ImageEditorView.locationImageUnit(forLocationInView: locationNow,
viewBounds: viewBounds,
model: self.model,
transform: self.model.currentTransform())
let gestureDeltaImageUnit = gestureNowImageUnit.minus(gestureStartImageUnit)
let unitCenter = CGPointClamp01(textItem.unitCenter.plus(gestureDeltaImageUnit))
// NOTE: We use max(1, ...) to avoid divide-by-zero.
let newScaling = CGFloatClamp(textItem.scaling * gestureRecognizer.pinchStateLast.distance / max(1.0, gestureRecognizer.pinchStateStart.distance),
@ -383,6 +389,13 @@ public class ImageEditorView: UIView {
private var movingTextStartUnitCenter: CGPoint?
private var movingTextHasMoved = false
private func textLayer(forLocation locationInView: CGPoint) -> EditorTextLayer? {
let viewBounds = self.canvasView.gestureReferenceView.bounds
let affineTransform = self.model.currentTransform().affineTransform(viewSize: viewBounds.size)
let locationInCanvas = locationInView.minus(viewBounds.center).applyingInverse(affineTransform).plus(viewBounds.center)
return canvasView.textLayer(forLocation: locationInCanvas)
}
@objc
public func handleMoveTextGesture(_ gestureRecognizer: ImageEditorPanGestureRecognizer) {
AssertIsOnMainThread()
@ -395,7 +408,7 @@ public class ImageEditorView: UIView {
owsFailDebug("Missing locationStart.")
return
}
guard let textLayer = canvasView.textLayer(forLocation: locationStart) else {
guard let textLayer = self.textLayer(forLocation: locationStart) else {
owsFailDebug("No text layer")
return
}
@ -420,12 +433,19 @@ public class ImageEditorView: UIView {
return
}
let locationUnitStart = canvasView.locationUnit(forLocationInView: locationStart, transform: model.currentTransform())
let locationNow = gestureRecognizer.location(in: canvasView.gestureReferenceView)
let locationUnitNow = canvasView.locationUnit(forLocationInView: locationNow, transform: model.currentTransform())
let unitLocationDelta = CGPointSubtract(locationUnitNow, locationUnitStart)
let unitCenter = CGPointClamp01(CGPointAdd(movingTextStartUnitCenter, unitLocationDelta))
let view = self.canvasView.gestureReferenceView
let viewBounds = view.bounds
let locationInView = gestureRecognizer.location(in: view)
let gestureStartImageUnit = ImageEditorView.locationImageUnit(forLocationInView: locationStart,
viewBounds: viewBounds,
model: self.model,
transform: self.model.currentTransform())
let gestureNowImageUnit = ImageEditorView.locationImageUnit(forLocationInView: locationInView,
viewBounds: viewBounds,
model: self.model,
transform: self.model.currentTransform())
let gestureDeltaImageUnit = gestureNowImageUnit.minus(gestureStartImageUnit)
let unitCenter = CGPointClamp01(movingTextStartUnitCenter.plus(gestureDeltaImageUnit))
let newItem = textItem.copy(withUnitCenter: unitCenter)
if movingTextHasMoved {
@ -461,7 +481,14 @@ public class ImageEditorView: UIView {
self.currentStrokeSamples.removeAll()
}
let tryToAppendStrokeSample = {
let newSample = self.locationUnit(forGestureRecognizer: gestureRecognizer, transform: self.model.currentTransform())
let view = self.canvasView.gestureReferenceView
let viewBounds = view.bounds
let locationInView = gestureRecognizer.location(in: view)
let newSample = ImageEditorView.locationImageUnit(forLocationInView: locationInView,
viewBounds: viewBounds,
model: self.model,
transform: self.model.currentTransform())
if let prevSample = self.currentStrokeSamples.last,
prevSample == newSample {
// Ignore duplicate samples.
@ -511,14 +538,15 @@ public class ImageEditorView: UIView {
// MARK: - Coordinates
private func locationUnit(forGestureRecognizer gestureRecognizer: UIGestureRecognizer,
transform: ImageEditorTransform) -> CGPoint {
return canvasView.locationUnit(forGestureRecognizer: gestureRecognizer, transform: transform)
}
private func locationUnit(forLocationInView locationInView: CGPoint,
transform: ImageEditorTransform) -> CGPoint {
return canvasView.locationUnit(forLocationInView: locationInView, transform: transform)
private class func locationImageUnit(forLocationInView locationInView: CGPoint,
viewBounds: CGRect,
model: ImageEditorModel,
transform: ImageEditorTransform) -> CGPoint {
let imageFrame = ImageEditorCanvasView.imageFrame(forViewSize: viewBounds.size, imageSize: model.srcImageSizePixels, transform: transform)
let affineTransformStart = transform.affineTransform(viewSize: viewBounds.size)
let locationInContent = locationInView.minus(viewBounds.center).applyingInverse(affineTransformStart).plus(viewBounds.center)
let locationImageUnit = locationInContent.toUnitCoordinates(viewBounds: imageFrame, shouldClamp: false)
return locationImageUnit
}
// MARK: - Edit Text Tool
@ -586,7 +614,7 @@ extension ImageEditorView: UIGestureRecognizerDelegate {
}
let location = touch.location(in: canvasView.gestureReferenceView)
let isInTextArea = canvasView.textLayer(forLocation: location) != nil
let isInTextArea = self.textLayer(forLocation: location) != nil
return isInTextArea
}
}

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