2 files changed, 17 insertions, 3 deletions
diff --git a/cocoa/ScintillaCocoa.h b/cocoa/ScintillaCocoa.h
index 4c1f10a97..f8c3357e0 100644
--- a/cocoa/ScintillaCocoa.h
+++ b/cocoa/ScintillaCocoa.h
@@ -103,6 +103,8 @@ private:
 	bool isFirstResponder;
 	bool isActive;
 
+	Point sizeClient;
+
 	bool enteredSetScrollingSize;
 
 	bool GetPasteboardData(NSPasteboard *board, SelectionText *selectedText);
@@ -118,6 +120,7 @@ private:
 
 protected:
 	Point GetVisibleOriginInMain() const override;
+	Point ClientSize() const override;
 	PRectangle GetClientRectangle() const override;
 	PRectangle GetClientDrawingRectangle() override;
 	Point ConvertPoint(NSPoint point);
diff --git a/cocoa/ScintillaCocoa.mm b/cocoa/ScintillaCocoa.mm
index 4f4fa1b71..223c9dac0 100644
--- a/cocoa/ScintillaCocoa.mm
+++ b/cocoa/ScintillaCocoa.mm
@@ -732,15 +732,22 @@ Scintilla::Internal::Point ScintillaCocoa::GetVisibleOriginInMain() const {
 //--------------------------------------------------------------------------------------------------
 
 /**
+ * Return the size of the client area which has been cached.
+ */
+Scintilla::Internal::Point ScintillaCocoa::ClientSize() const {
+	return sizeClient;
+}
+
+//--------------------------------------------------------------------------------------------------
+
+/**
  * Instead of returning the size of the inner view we have to return the visible part of it
  * in order to make scrolling working properly.
  * The returned value is in document coordinates.
  */
 PRectangle ScintillaCocoa::GetClientRectangle() const {
 	NSScrollView *scrollView = ScrollContainer();
-	NSSize size = scrollView.contentView.bounds.size;
-	Point origin = GetVisibleOriginInMain();
-	return PRectangle(origin.x, origin.y, origin.x+size.width, origin.y + size.height);
+	return NSRectToPRectangle(scrollView.contentView.bounds);
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -2033,6 +2040,10 @@ bool ScintillaCocoa::SetScrollingSize() {
 
 void ScintillaCocoa::Resize() {
 	SetScrollingSize();
+
+	const PRectangle rcClient = GetClientRectangle();
+	sizeClient = Point(rcClient.Width(), rcClient.Height());
+
 	ChangeSize();
 }