2 files changed, 20 insertions, 0 deletions
diff --git a/src/Document.cxx b/src/Document.cxx
index ffbf8f557..21d492a8e 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -107,6 +107,10 @@ double ActionDuration::Duration() const noexcept {
 	return duration;
 }
 
+size_t ActionDuration::ActionsInAllowedTime(double secondsAllowed) const noexcept {
+	return std::lround(secondsAllowed / Duration());
+}
+
 Document::Document(int options) :
 	cb((options & SC_DOCUMENTOPTION_STYLES_NONE) == 0, (options & SC_DOCUMENTOPTION_TEXT_LARGE) != 0),
 	durationStyleOneLine(0.00001, 0.000001, 0.0001) {
@@ -474,6 +478,20 @@ Sci::Line Document::LineFromPositionIndex(Sci::Position pos, int lineCharacterIn
 	return cb.LineFromPositionIndex(pos, lineCharacterIndex);
 }
 
+Sci::Line Document::LineFromPositionAfter(Sci::Line line, Sci::Position length) const noexcept {
+	const Sci::Position posAfter = cb.LineStart(line) + length;
+	if (posAfter >= LengthNoExcept()) {
+		return LinesTotal();
+	}
+	const Sci::Line lineAfter = SciLineFromPosition(posAfter);
+	if (lineAfter > line) {
+		return lineAfter;
+	} else {
+		// Want to make some progress so return next line
+		return lineAfter + 1;
+	}
+}
+
 int SCI_METHOD Document::SetLevel(Sci_Position line, int level) {
 	const int prev = Levels()->SetLevel(line, level, LinesTotal());
 	if (prev != level) {
diff --git a/src/Document.h b/src/Document.h
index e2d9eddce..690871ba8 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -207,6 +207,7 @@ public:
 	ActionDuration(double duration_, double minDuration_, double maxDuration_) noexcept;
 	void AddSample(size_t numberActions, double durationOfActions) noexcept;
 	double Duration() const noexcept;
+	size_t ActionsInAllowedTime(double secondsAllowed) const noexcept;
 };
 
 /**
@@ -416,6 +417,7 @@ public:
 	Sci::Position VCHomePosition(Sci::Position position) const;
 	Sci::Position IndexLineStart(Sci::Line line, int lineCharacterIndex) const noexcept;
 	Sci::Line LineFromPositionIndex(Sci::Position pos, int lineCharacterIndex) const noexcept;
+	Sci::Line LineFromPositionAfter(Sci::Line line, Sci::Position length) const noexcept;
 
 	int SCI_METHOD SetLevel(Sci_Position line, int level) override;
 	int SCI_METHOD GetLevel(Sci_Position line) const override;