From 43ba96d61994db084e61b31df278d2d87c1f313c Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Thu, 2 Mar 2023 22:02:19 +1100
Subject: Add multithreaded wrap to significantly improve performance of
 wrapping large files.

---
 src/PositionCache.cxx | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src/PositionCache.cxx')

diff --git a/src/PositionCache.cxx b/src/PositionCache.cxx
index 30d76b1d3..9f4e4edc7 100644
--- a/src/PositionCache.cxx
+++ b/src/PositionCache.cxx
@@ -102,6 +102,13 @@ void LineLayout::Resize(int maxLineLength_) {
 	}
 }
 
+void LineLayout::ReSet(Sci::Line lineNumber_, Sci::Position maxLineLength_) {
+	lineNumber = lineNumber_;
+	Resize(static_cast<int>(maxLineLength_));
+	lines = 0;
+	Invalidate(ValidLevel::invalid);
+}
+
 void LineLayout::EnsureBidiData() {
 	if (!bidiData) {
 		bidiData = std::make_unique<BidiData>();
@@ -114,6 +121,7 @@ void LineLayout::Free() noexcept {
 	styles.reset();
 	positions.reset();
 	lineStarts.reset();
+	lenLineStarts = 0;
 	bidiData.reset();
 }
 
@@ -446,6 +454,21 @@ XYPOSITION ScreenLine::TabPositionAfter(XYPOSITION xPosition) const {
 	return (std::floor((xPosition + TabWidthMinimumPixels()) / TabWidth()) + 1) * TabWidth();
 }
 
+bool SignificantLines::LineMayCache(Sci::Line line) const noexcept {
+	switch (level) {
+	case LineCache::None:
+		return false;
+	case LineCache::Caret:
+		return line == lineCaret;
+	case LineCache::Page:
+		return (abs(line - lineCaret) < linesOnScreen) ||
+			((line >= lineTop) && (line <= (lineTop + linesOnScreen)));
+	case LineCache::Document:
+	default:
+		return true;
+	}
+}
+
 LineLayoutCache::LineLayoutCache() :
 	level(LineCache::None),
 	allInvalidated(false), styleClock(-1) {
-- 
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