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perf(chat): memoize inline LaTeX and match bare URLs once (#1316) (#1342)

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m57 authored and GitHub committed 2026-09-28 00:49:17 +03:00
1 parent 4fc4d097cc
commit 18953e368b
2 files changed
+53 -33
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app/src/main/java/com/m57/hermescontrol/ui/chat/markdown/MarkdownInlineStyler.kt
+6 -4
View File
@@ -68,6 +68,9 @@ object MarkdownInlineStyler {
val src = text
while (i < src.length) {
// Cheap prefix gate: URL_PATTERN only matches at "http(s)://", so skip the regex elsewhere.
val urlMatch =
if (src.startsWith("http", i, ignoreCase = true)) URL_PATTERN.matchAt(src, i) else null
when {
// Inline code is opaque to emphasis parsing, and delimiters must match by run length.
src[i] == '`' -> {
@@ -312,9 +315,8 @@ object MarkdownInlineStyler {
}
// bare URL
URL_PATTERN.matchAt(src, i) != null -> {
val match = URL_PATTERN.matchAt(src, i)!!
val url = match.value
urlMatch != null -> {
val url = urlMatch.value
val urlToAppend = if (isRtl) BidiUtils.wrapLtrIsolate(url) else url
pushLink(LinkAnnotation.Url(url))
withStyle(
@@ -326,7 +328,7 @@ object MarkdownInlineStyler {
append(urlToAppend)
}
pop()
i = match.range.last + 1
i = urlMatch.range.last + 1
}
// Plain text / words in RTL
app/src/main/java/com/m57/hermescontrol/ui/chat/markdown/MarkdownInlineText.kt
+47 -29
View File
@@ -66,38 +66,56 @@ fun MarkdownInlineText(
}
val config =
LatexConfig(
fontSize = style.fontSize,
theme = LatexTheme.light(color = textColor, backgroundColor = Color.Transparent),
accessibilityEnabled = true,
)
val inlineContent = mutableMapOf<String, InlineTextContent>()
segments.forEachIndexed { index, segment ->
if (segment is InlineMathSegment.Math) {
latexMeasurer.inlineContent(segment.latex, config)?.let { inlineContent["latex-$index"] = it }
remember(style.fontSize, textColor) {
LatexConfig(
fontSize = style.fontSize,
theme = LatexTheme.light(color = textColor, backgroundColor = Color.Transparent),
accessibilityEnabled = true,
)
}
}
val annotated =
buildAnnotatedString {
val inlineContent =
remember(segments, latexMeasurer, config) {
val map = mutableMapOf<String, InlineTextContent>()
segments.forEachIndexed { index, segment ->
when (segment) {
is InlineMathSegment.Math -> {
val id = "latex-$index"
if (id in inlineContent) appendInlineContent(id, segment.latex) else append(segment.latex)
}
if (segment is InlineMathSegment.Math) {
latexMeasurer.inlineContent(segment.latex, config)?.let { map["latex-$index"] = it }
}
}
map
}
val annotated =
remember(
segments,
inlineContent,
textColor,
searchQuery,
isCurrentMatch,
linkColor,
highlights,
isRtl,
) {
buildAnnotatedString {
segments.forEachIndexed { index, segment ->
when (segment) {
is InlineMathSegment.Math -> {
val id = "latex-$index"
val measured = id in inlineContent
if (measured) appendInlineContent(id, segment.latex) else append(segment.latex)
}
is InlineMathSegment.Text -> {
append(
MarkdownInlineStyler.parseInlineSource(
text = segment.value,
textColor = textColor,
searchQuery = searchQuery,
isCurrentMatch = isCurrentMatch,
linkColor = linkColor,
highlights = highlights,
isRtl = isRtl,
),
)
is InlineMathSegment.Text -> {
append(
MarkdownInlineStyler.parseInlineSource(
text = segment.value,
textColor = textColor,
searchQuery = searchQuery,
isCurrentMatch = isCurrentMatch,
linkColor = linkColor,
highlights = highlights,
isRtl = isRtl,
),
)
}
}
}
}