370ff654e7
Change license to AGPL
This commit:
- Updates the `LICENSE` file
- Start every file with something like:
// Copyright YEAR_FIRST_PUBLISHED Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
---
First, I removed existing license headers with this Ruby 3.1.2 script:
require 'set'
EXTENSIONS_TO_CHECK = Set['.h', '.hpp', '.cpp', '.m', '.mm', '.pch', '.swift']
same = 0
different = 0
all_files = `git ls-files`.lines.map { |line| line.strip }
all_files.each do |relative_path|
if relative_path == 'Pods'
next
end
unless EXTENSIONS_TO_CHECK.include? File.extname(relative_path)
next
end
path = File.expand_path(relative_path)
contents = File.read(path)
new_contents = contents.sub(/\/\/\n\/\/ Copyright .*\n\/\/\n\n/, '')
if contents == new_contents
same += 1
else
different += 1
end
File.write(path, new_contents)
end
puts "updated #{different} file(s), left #{same} untouched"
I'm sure this script could be improved, but it worked well enough.
Then, I created `Scripts/lint/lint-license-headers` and ran it to auto-
fix a lot of files. This changed the mode of some files, but I think
that's actually desirable. For example,
`SignalServiceKit/src/Util/AppContext.m` previously had a mode of
`0755/-rwxr-xr-x`, and it's now `0644/-rw-r--r--`.
Then I fixed some stragglers and updated the precommit script.
See [a similar change in the Desktop app][0].
[0]: 8bfaf598af
96 lines
3.2 KiB
Swift
96 lines
3.2 KiB
Swift
//
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// Copyright 2018 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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public class GradientView: UIView {
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public override class var layerClass: AnyClass { CAGradientLayer.self }
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public var gradientLayer: CAGradientLayer { layer as! CAGradientLayer }
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public var colors: [UIColor] {
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didSet {
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updateGradientColors()
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}
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}
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public var locations: [CGFloat]? {
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didSet {
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updateGradientLocations()
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}
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}
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public convenience init(from fromColor: UIColor, to toColor: UIColor) {
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self.init(colors: [ fromColor, toColor ])
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}
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public required init(colors: [UIColor], locations: [CGFloat]? = nil) {
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self.colors = colors
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self.locations = locations
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super.init(frame: .zero)
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updateGradientColors()
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updateGradientLocations()
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}
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public required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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private func updateGradientColors() {
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gradientLayer.colors = colors.map { $0.cgColor }
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}
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private func updateGradientLocations() {
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if let locations = locations, !locations.isEmpty {
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gradientLayer.locations = locations.map { NSNumber(value: $0) }
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} else {
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gradientLayer.locations = nil
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}
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}
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/// Sets the `startPoint` and `endPoint` of the layer to reflect an angle in degrees
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/// where 0° starts at 12 o'clock and proceeds in a clockwise direction.
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public func setAngle(_ angle: UInt32) {
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// While design provides gradients with 0° at 12 o'clock, core animation's
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// coordinate system works with 0° at 3 o'clock moving in a counter clockwise
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// direction. We need to convert the provided angle accordingly before
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// calculating the gradient's start and end points.
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let caAngle =
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(360 - angle) // Invert to counter clockwise direction
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+ 90 // Rotate 90° counter clockwise to shift the start from 3 o'clock to 12 o'clock
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let radians = CGFloat(caAngle) * .pi / 180.0
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// (x,y) in terms of the signed unit circle
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var endPoint = CGPoint(x: cos(radians), y: sin(radians))
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// extrapolate to signed unit square
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if abs(endPoint.x) > abs(endPoint.y) {
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endPoint.x = endPoint.x > 0 ? 1 : -1
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endPoint.y = endPoint.x * tan(radians)
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} else {
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endPoint.y = endPoint.y > 0 ? 1 : -1
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endPoint.x = endPoint.y / tan(radians)
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}
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// The signed unit square is a coordinate space from:
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// (-1,-1) to (1,1), but the gradient coordinate space
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// ranges from (0,0) to (1,1) with 0 being the top
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// left. Convert each point accordingly to calculate
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// the final points.
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func convertPointToGradientSpace(_ point: CGPoint) -> CGPoint {
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return CGPoint(
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x: (point.x + 1) * 0.5,
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y: 1.0 - (point.y + 1) * 0.5
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)
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}
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// The start point will always be at the opposite side of the signed unit square.
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gradientLayer.startPoint = convertPointToGradientSpace(CGPoint(x: -endPoint.x, y: -endPoint.y))
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gradientLayer.endPoint = convertPointToGradientSpace(endPoint)
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}
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}
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