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feat: set comment name color above WCAG Guidelines

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rebelonion 2024-02-23 18:13:00 -06:00
parent 70c87b4067
commit 7ba117ec25
3 changed files with 108 additions and 18 deletions
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73
app/src/main/java/ani/dantotsu/media/comments/CommentItem.kt
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@ -27,12 +27,14 @@ import java.text.SimpleDateFormat
import java.util.Date
import java.util.TimeZone
import kotlin.math.abs
import kotlin.math.pow
import kotlin.math.sqrt
class CommentItem(val comment: Comment,
private val markwon: Markwon,
private val section: Section,
private val commentsActivity: CommentsActivity,
private val backgroundColor: Int
) : BindableItem<ItemCommentsBinding>() {
var binding: ItemCommentsBinding? = null
val adapter = GroupieAdapter()
@ -162,7 +164,7 @@ class CommentItem(val comment: Comment,
viewBinding.commentUserAvatar
comment.profilePictureUrl?.let { viewBinding.commentUserAvatar.loadImage(it) }
viewBinding.commentUserName.text = comment.username
viewBinding.commentUserName.setTextColor(getAvatarColor(comment.upvotes - comment.downvotes))
viewBinding.commentUserName.setTextColor(getAvatarColor(comment.upvotes - comment.downvotes, backgroundColor))
viewBinding.commentUserTime.text = "● ${formatTimestamp(comment.timestamp)}"
}
@ -236,16 +238,69 @@ class CommentItem(val comment: Comment,
}
}
private fun getAvatarColor(voteCount: Int): Int {
//0.8x^{2} where x is the level
val level = sqrt(abs(voteCount.toDouble()) / 0.8).toInt()
return if (level > usernameColors.size - 1) {
Color.parseColor(usernameColors[usernameColors.size - 1])
} else {
Color.parseColor(usernameColors[level])
}
private fun getLuminance(color: Int): Double {
val r = Color.red(color) / 255.0
val g = Color.green(color) / 255.0
val b = Color.blue(color) / 255.0
val rL = if (r <= 0.03928) r / 12.92 else ((r + 0.055) / 1.055).pow(2.4)
val gL = if (g <= 0.03928) g / 12.92 else ((g + 0.055) / 1.055).pow(2.4)
val bL = if (b <= 0.03928) b / 12.92 else ((b + 0.055) / 1.055).pow(2.4)
return 0.2126 * rL + 0.7152 * gL + 0.0722 * bL
}
private fun getContrastRatio(color1: Int, color2: Int): Double {
val l1 = getLuminance(color1)
val l2 = getLuminance(color2)
return if (l1 > l2) (l1 + 0.05) / (l2 + 0.05) else (l2 + 0.05) / (l1 + 0.05)
}
private fun getAvatarColor(voteCount: Int, backgroundColor: Int): Int {
val level = sqrt(abs(voteCount.toDouble()) / 0.8).toInt()
val colorString = if (level > usernameColors.size - 1) usernameColors[usernameColors.size - 1] else usernameColors[level]
var color = Color.parseColor(colorString)
val ratio = getContrastRatio(color, backgroundColor)
if (ratio < 4.5) {
color = adjustColorForContrast(color, backgroundColor)
}
return color
}
private fun adjustColorForContrast(originalColor: Int, backgroundColor: Int): Int {
var adjustedColor = originalColor
var contrastRatio = getContrastRatio(adjustedColor, backgroundColor)
val isBackgroundDark = getLuminance(backgroundColor) < 0.5
while (contrastRatio < 4.5) {
// Adjust brightness by modifying the RGB values
val r = Color.red(adjustedColor)
val g = Color.green(adjustedColor)
val b = Color.blue(adjustedColor)
// Calculate the amount to adjust
val adjustment = if (isBackgroundDark) 10 else -10
// Adjust the color
val newR = (r + adjustment).coerceIn(0, 255)
val newG = (g + adjustment).coerceIn(0, 255)
val newB = (b + adjustment).coerceIn(0, 255)
adjustedColor = Color.rgb(newR, newG, newB)
contrastRatio = getContrastRatio(adjustedColor, backgroundColor)
// Break the loop if the color adjustment does not change (to avoid infinite loop)
if (newR == r && newG == g && newB == b) {
break
}
}
return adjustedColor
}
private val usernameColors: Array<String> = arrayOf(
"#9932cc",
"#a020f0",