From 6d81c09cca199b5eb10b7e7b5b2fdc97de711892 Mon Sep 17 00:00:00 2001
From: zufuliu <zufuliu@gmail.com>
Date: Sat, 29 Aug 2020 08:18:56 +0800
Subject: [PATCH] Trying to fix application unresponsive when wrapping
 consecutive long lines, issue #234. See
 https://sourceforge.net/p/scintilla/feature-requests/1373/

---
 scintilla/src/Document.cxx | 20 +++++++++++++-------
 scintilla/src/Document.h   |  9 +++++----
 scintilla/src/Editor.cxx   | 10 +++-------
 3 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/scintilla/src/Document.cxx b/scintilla/src/Document.cxx
index 1067f116db..aefc65cbe0 100644
--- a/scintilla/src/Document.cxx
+++ b/scintilla/src/Document.cxx
@@ -84,9 +84,9 @@ int LexInterface::LineEndTypesSupported() const noexcept {
 	return 0;
 }
 
-ActionDuration::ActionDuration(double duration_, double minDuration_, double maxDuration_) noexcept :
-	duration(duration_), minDuration(minDuration_), maxDuration(maxDuration_) {
-}
+//ActionDuration::ActionDuration(double duration_, double minDuration_, double maxDuration_) noexcept :
+//	duration(duration_), minDuration(minDuration_), maxDuration(maxDuration_) {
+//}
 
 void ActionDuration::AddSample(size_t numberActions, double durationOfActions) noexcept {
 	// Only adjust for multiple actions to avoid instability
@@ -98,17 +98,23 @@ void ActionDuration::AddSample(size_t numberActions, double durationOfActions) n
 	constexpr double alpha = 0.25;
 
 	const double durationOne = durationOfActions / numberActions;
-	duration = std::clamp(alpha * durationOne + (1.0 - alpha) * duration,
-		minDuration, maxDuration);
+	const double duration_ = alpha * durationOne + (1.0 - alpha) * duration;
+	//duration = std::clamp(duration_, minDuration, maxDuration);
+	duration = std::max(duration_, minDuration);
+	//printf("%s actions=%zu, one=%.9f, value=%.9f, [%.9f, %f, %f]\n", __func__,
+	//	numberActions, durationOne, duration_, duration, minDuration, maxDuration);
 }
 
 double ActionDuration::Duration() const noexcept {
 	return duration;
 }
 
+Sci::Line ActionDuration::LinesInAllowedTime(double secondsAllowed) const noexcept {
+	return std::clamp<Sci::Line>(static_cast<Sci::Line>(secondsAllowed / duration), 8, 0x10000);
+}
+
 Document::Document(int options) :
-	cb((options & SC_DOCUMENTOPTION_STYLES_NONE) == 0, (options & SC_DOCUMENTOPTION_TEXT_LARGE) != 0),
-	durationStyleOneLine(0.00001, 0.000001, 0.0001) {
+	cb((options & SC_DOCUMENTOPTION_STYLES_NONE) == 0, (options & SC_DOCUMENTOPTION_TEXT_LARGE) != 0) {
 	refCount = 0;
 #ifdef _WIN32
 	eolMode = SC_EOL_CRLF;
diff --git a/scintilla/src/Document.h b/scintilla/src/Document.h
index 65a23e2726..d87864ac8e 100644
--- a/scintilla/src/Document.h
+++ b/scintilla/src/Document.h
@@ -198,13 +198,14 @@ struct RegexError : public std::runtime_error {
  */
 
 class ActionDuration {
-	double duration;
-	const double minDuration;
-	const double maxDuration;
+	double duration = 1e-5;
+	static constexpr double minDuration = 1e-6;
+	static constexpr double maxDuration = 1e-4;
 public:
-	ActionDuration(double duration_, double minDuration_, double maxDuration_) noexcept;
+	//ActionDuration(double duration_, double minDuration_, double maxDuration_) noexcept;
 	void AddSample(size_t numberActions, double durationOfActions) noexcept;
 	double Duration() const noexcept;
+	Sci::Line LinesInAllowedTime(double secondsAllowed) const noexcept;
 };
 
 /**
diff --git a/scintilla/src/Editor.cxx b/scintilla/src/Editor.cxx
index a82aa0d9c1..ef225e82b9 100644
--- a/scintilla/src/Editor.cxx
+++ b/scintilla/src/Editor.cxx
@@ -109,7 +109,7 @@ static constexpr bool IsAllSpacesOrTabs(std::string_view sv) noexcept {
 	return true;
 }
 
-Editor::Editor() : durationWrapOneLine(0.00001, 0.000001, 0.0001) {
+Editor::Editor() {
 	ctrlID = 0;
 
 	stylesValid = false;
@@ -1553,9 +1553,7 @@ bool Editor::WrapLines(WrapScope ws) {
 		} else if (ws == WrapScope::wsIdle) {
 			// Try to keep time taken by wrapping reasonable so interaction remains smooth.
 			constexpr double secondsAllowed = 0.01;
-			const Sci::Line linesInAllowedTime = std::clamp<Sci::Line>(
-				static_cast<Sci::Line>(secondsAllowed / durationWrapOneLine.Duration()),
-				LinesOnScreen() + 50, 0x10000);
+			const Sci::Line linesInAllowedTime = durationWrapOneLine.LinesInAllowedTime(secondsAllowed);
 			lineToWrapEnd = lineToWrap + linesInAllowedTime;
 		}
 		const Sci::Line lineEndNeedWrap = std::min(wrapPending.end, pdoc->LinesTotal());
@@ -5116,10 +5114,8 @@ Sci::Position Editor::PositionAfterMaxStyling(Sci::Position posMax, bool scrolli
 	// Try to keep time taken by styling reasonable so interaction remains smooth.
 	// When scrolling, allow less time to ensure responsive
 	const double secondsAllowed = scrolling ? 0.005 : 0.02;
+	const Sci::Line linesToStyle = pdoc->durationStyleOneLine.LinesInAllowedTime(secondsAllowed);
 
-	const Sci::Line linesToStyle = std::clamp(
-		static_cast<int>(secondsAllowed / pdoc->durationStyleOneLine.Duration()),
-		10, 0x10000);
 	const Sci::Line stylingMaxLine = std::min(
 		pdoc->SciLineFromPosition(pdoc->GetEndStyled()) + linesToStyle,
 		pdoc->LinesTotal());