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Improves (Show More) presence to only when it actually makes a difference.

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Vitor Pamplona 2024-11-12 13:36:59 -05:00
parent bf861d6bc5
commit 3a566dad6b
1 changed files with 21 additions and 9 deletions
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30
commons/src/main/java/com/vitorpamplona/amethyst/commons/richtext/ExpandableTextCutOffCalculator.kt
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@ -27,26 +27,38 @@ class ExpandableTextCutOffCalculator {
private const val TOO_FAR_SEARCH_THE_OTHER_WAY = 450
fun indexToCutOff(content: String): Int {
// Cuts the text in the first space or new line after SHORT_TEXT_LENGTH characters
// Cuts the text in the first space or first new line after SHORT_TEXT_LENGTH characters
val firstSpaceAfterCut =
content.indexOf(' ', SHORT_TEXT_LENGTH).let { if (it < 0) content.length else it }
val firstNewLineAfterCut =
content.indexOf('\n', SHORT_TEXT_LENGTH).let { if (it < 0) content.length else it }
// Cuts the text if too many new lines have passed.
val firstLineAfterLineLimits =
content.nthIndexOf('\n', SHORTEN_AFTER_LINES).let { if (it < 0) content.length else it }
// gets the minimum of them all.
val min = minOf(firstSpaceAfterCut, firstNewLineAfterCut, firstLineAfterLineLimits)
if (min > TOO_FAR_SEARCH_THE_OTHER_WAY) {
val newString = content.take(SHORT_TEXT_LENGTH)
val firstSpaceBeforeCut =
newString.lastIndexOf(' ').let { if (it < 0) content.length else it }
val firstNewLineBeforeCut =
newString.lastIndexOf('\n').let { if (it < 0) content.length else it }
val result =
if (min > TOO_FAR_SEARCH_THE_OTHER_WAY) {
// if it is still too big, finds the first space or new line BEFORE the cut off.
val newString = content.take(SHORT_TEXT_LENGTH)
val firstSpaceBeforeCut =
newString.lastIndexOf(' ').let { if (it < 0) content.length else it }
val firstNewLineBeforeCut =
newString.lastIndexOf('\n').let { if (it < 0) content.length else it }
return maxOf(firstSpaceBeforeCut, firstNewLineBeforeCut)
maxOf(firstSpaceBeforeCut, firstNewLineBeforeCut)
} else {
min
}
// Only returns if the difference between short and long posts is more than 100 chars or too many new lines.
return if (result == firstLineAfterLineLimits || result + 100 < content.length) {
result
} else {
return min
content.length
}
}
}