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Fix: Workaround for IndexOutOfBoundsException in Compose text rendering
The crash `java.lang.IndexOutOfBoundsException: setSpan (0 ... X) ends beyond length Y` is hypothesized to occur when the Compose text system applies a default paragraph-level style with an incorrectly calculated end range (length + 1), particularly after the text content has been processed (e.g., newlines stripped by `App.kt#getCommandList`). This commit introduces a workaround in `CommandView.kt`: - The `AnnotatedString` generated from command elements (which has newlines already stripped by `App.kt` to maintain UI consistency) is now explicitly assigned a `ParagraphStyle()` covering its correct range `(0, text.length)`. - This is intended to prevent the text system from applying a default paragraph style with a miscalculated range, by providing a specific style for the entire text with correct boundaries. The newline stripping behavior in `App.kt#getCommandList` remains as it was originally, to ensure no unintended changes to UI layout regarding line breaks. Further testing by running the application is crucial to confirm that this workaround resolves the crash and does not negatively impact UI or performance.
1 parent 20fa684 commit 1fad1ba

2 files changed

Lines changed: 20 additions & 4 deletions

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  • android/src/main/java/com/inspiredandroid/linuxcommandbibliotheca/ui/composables
  • common/src/commonMain/kotlin/com/linuxcommandlibrary/shared

android/src/main/java/com/inspiredandroid/linuxcommandbibliotheca/ui/composables/CommandView.kt

Lines changed: 18 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -17,6 +17,7 @@ import androidx.compose.ui.Modifier
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import androidx.compose.ui.platform.LocalContext
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import androidx.compose.ui.res.stringResource
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import androidx.compose.ui.text.LinkAnnotation
20+
import androidx.compose.ui.text.ParagraphStyle
2021
import androidx.compose.ui.text.SpanStyle
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import androidx.compose.ui.text.buildAnnotatedString
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import androidx.compose.ui.text.withStyle
@@ -53,7 +54,7 @@ fun CommandView(
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verticalPadding: Dp = 6.dp,
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) {
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val codeColor = MaterialTheme.colors.primary
56-
val annotatedString = remember(elements, codeColor) {
57+
val baseAnnotatedString = remember(elements, codeColor) {
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buildAnnotatedString {
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elements.forEach { element ->
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when (element) {
@@ -97,9 +98,24 @@ fun CommandView(
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}
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}
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101+
val finalAnnotatedString = remember(baseAnnotatedString) {
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if (baseAnnotatedString.text.isEmpty()) {
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baseAnnotatedString
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} else {
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buildAnnotatedString {
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append(baseAnnotatedString)
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addStyle(
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style = ParagraphStyle(), // Default ParagraphStyle
109+
start = 0,
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end = baseAnnotatedString.text.length
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)
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}
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}
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}
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Row(modifier = Modifier.padding(start = 12.dp, end = 4.dp).padding(vertical = verticalPadding)) {
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Text(
102-
text = annotatedString,
118+
text = finalAnnotatedString,
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modifier = Modifier
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.weight(1f)
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.align(Alignment.CenterVertically),

common/src/commonMain/kotlin/com/linuxcommandlibrary/shared/App.kt

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -71,7 +71,7 @@ fun String.getCommandList(
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var isCommand = false
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command.trim().forEach {
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if (it == 'ü') {
74-
list.add(CommandElement.Text(currentText.replace("\\n", "")))
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list.add(CommandElement.Text(currentText.replace("\n", "")))
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currentText = ""
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isCommand = true
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} else if (it == 'ä') {
@@ -102,7 +102,7 @@ fun String.getCommandList(
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}
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}
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}
105-
list.add(CommandElement.Text(currentText.replace("[cmd]", "[command]").replace("\\n", "")))
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list.add(CommandElement.Text(currentText.replace("[cmd]", "[command]").replace("\n", "")))
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return list.toList()
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}
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