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fix: extending paragraph style on paste #472

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fix: extending paragraph style on paste #472

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24 changes: 24 additions & 0 deletions android/src/main/java/com/swmansion/enriched/textinput/utils/EnrichedSpannable.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,10 @@ fun Spannable.mergeSpannables(
val isNewLineStart = startBlockSpans.isNotEmpty() || startParagraphSpans.isNotEmpty()
val isNewLineEnd = endBlockSpans.isNotEmpty() || endParagraphSpans.isNotEmpty()

val pastedHasOwnStyles =
spannable.getSpans(0, spannable.length, EnrichedBlockSpan::class.java).isNotEmpty() ||
spannable.getSpans(0, spannable.length, EnrichedParagraphSpan::class.java).isNotEmpty()

if (isNewLineStart && start != paragraphStart) {
builder.insert(start, "\n")
finalStart = start + 1
Expand All @@ -78,5 +82,25 @@ fun Spannable.mergeSpannables(

builder.replace(finalStart, finalEnd, spannable)

// Manually extend existing paragraph/block spans to cover the pasted text.
if (!pastedHasOwnStyles) {
val pasteEnd = finalStart + spannable.length

val affectedParagraphSpans = builder.getSpans(finalStart, finalStart, EnrichedParagraphSpan::class.java)
val affectedBlockSpans = builder.getSpans(finalStart, finalStart, EnrichedBlockSpan::class.java)
val affectedSpans = affectedBlockSpans.toList() + affectedParagraphSpans.toList()

for (span in affectedSpans) {
val spanStart = builder.getSpanStart(span)
val spanEnd = builder.getSpanEnd(span)
if (spanStart == -1 || spanEnd >= pasteEnd) continue

val (_, newParagraphEnd) = builder.getParagraphBounds(spanStart, pasteEnd)
val flags = builder.getSpanFlags(span)
builder.removeSpan(span)
builder.setSpan(span, spanStart, newParagraphEnd, flags)
}
}

return builder
}