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chore(lint): remove magic numbers
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parent
1fb1fb9602
commit
81744becf3
21
color.go
21
color.go
@ -197,12 +197,18 @@ func hexToColor(hex string) (c color.RGBA) {
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return c
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}
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const (
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fullFormat = 7 // #RRGGBB
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shortFormat = 4 // #RGB
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)
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switch len(hex) {
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case 7: // #RRGGBB
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c.R = hexToByte(hex[1])<<4 + hexToByte(hex[2])
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c.G = hexToByte(hex[3])<<4 + hexToByte(hex[4])
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c.B = hexToByte(hex[5])<<4 + hexToByte(hex[6])
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case 4: // #RGB
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case fullFormat:
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const offset = 4
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c.R = hexToByte(hex[1])<<offset + hexToByte(hex[2])
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c.G = hexToByte(hex[3])<<offset + hexToByte(hex[4])
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c.B = hexToByte(hex[5])<<offset + hexToByte(hex[6])
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case shortFormat:
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const offset = 0x11
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c.R = hexToByte(hex[1]) * offset
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c.G = hexToByte(hex[2]) * offset
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@ -213,13 +219,14 @@ func hexToColor(hex string) (c color.RGBA) {
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}
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func hexToByte(b byte) byte {
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const offset = 10
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switch {
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case b >= '0' && b <= '9':
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return b - '0'
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case b >= 'a' && b <= 'f':
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return b - 'a' + 10
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return b - 'a' + offset
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case b >= 'A' && b <= 'F':
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return b - 'A' + 10
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return b - 'A' + offset
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}
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// Invalid, but just return 0.
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return 0
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