Add _ViewWidth(), _ViewHeight(), _TextWidth(), _TextHeight()

private convenience methods to calculate the text view width and
height with insets and the text rect width and height without
insets respectively.

Also add _ViewRect() and _TextRect() methods for completeness,
but they are not currently used.

Change-Id: I0582bc93a0a3a6820bbb2262a1d726457309ab9f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7162
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

headers/os/interface/TextView.h

@@ -418,6 +418,14 @@ private:
 
 			void				_UpdateInsets(const BRect& rect);
 
+			float				_ViewWidth();
+			float				_ViewHeight();
+			BRect				_ViewRect();
+
+			float				_TextWidth();
+			float				_TextHeight();
+			BRect				_TextRect();
+
 private:
 			BPrivate::TextGapBuffer*	fText;
 			LineBuffer*			fLines;

src/kits/interface/TextView.cpp

@@ -816,8 +816,7 @@ BTextView::FrameResized(float newWidth, float newHeight)
 		// don't recalculate line breaks,
 		// move text rect into position and redraw.
 
-		float dataWidth = fLayoutData->leftInset
-			+ fTextRect.Width() + fLayoutData->rightInset;
+		float dataWidth = _TextWidth();
 		newWidth = std::max(dataWidth, newWidth);
 
 		// align rect
@@ -2810,8 +2809,7 @@ BTextView::_ValidateLayoutData()
 	fLayoutData->min = min;
 
 	// compute our preferred size
-	fLayoutData->preferred.height = fTextRect.Height()
-		+ fLayoutData->topInset + fLayoutData->bottomInset;
+	fLayoutData->preferred.height = _TextHeight();
 
 	if (fWrap)
 		fLayoutData->preferred.width = min.width + 5 * lineHeight;
@@ -5050,8 +5048,7 @@ BTextView::_UpdateScrollbars()
 	// do we have a horizontal scroll bar?
 	if (horizontalScrollBar != NULL) {
 		long viewWidth = bounds.IntegerWidth();
-		long dataWidth = (long)ceilf(fTextRect.IntegerWidth()
-			+ fLayoutData->leftInset + fLayoutData->rightInset);
+		long dataWidth = (long)ceilf(_TextWidth());
 
 		long maxRange = dataWidth - viewWidth;
 		maxRange = std::max(maxRange, 0l);
@@ -5066,8 +5063,7 @@ BTextView::_UpdateScrollbars()
 	// how about a vertical scroll bar?
 	if (verticalScrollBar != NULL) {
 		long viewHeight = bounds.IntegerHeight();
-		long dataHeight = (long)ceilf(fLayoutData->topInset
-			+ fTextRect.IntegerHeight() + fLayoutData->bottomInset);
+		long dataHeight = (long)ceilf(_TextHeight());
 
 		long maxRange = dataHeight - viewHeight;
 		maxRange = std::max(maxRange, 0l);
@@ -5122,8 +5118,7 @@ BTextView::_AutoResize(bool redraw)
 	// NOTE: This container view thing is only used by Tracker.
 	// move container view if not left aligned
 	float oldWidth = Bounds().Width();
-	float newWidth = fLayoutData->leftInset + fTextRect.Width()
-		+ fLayoutData->rightInset;
+	float newWidth = _TextWidth();
 	float right = oldWidth - newWidth;
 
 	if (fAlignment == B_ALIGN_CENTER)
@@ -6041,6 +6036,68 @@ BTextView::_UpdateInsets(const BRect& rect)
 }
 
 
+float
+BTextView::_ViewWidth()
+{
+	return Bounds().Width()
+		- fLayoutData->leftInset
+		- fLayoutData->rightInset;
+}
+
+
+float
+BTextView::_ViewHeight()
+{
+	return Bounds().Height()
+		- fLayoutData->topInset
+		- fLayoutData->bottomInset;
+}
+
+
+BRect
+BTextView::_ViewRect()
+{
+	BRect rect(Bounds());
+	rect.left += fLayoutData->leftInset;
+	rect.top += fLayoutData->topInset;
+	rect.right -= fLayoutData->rightInset;
+	rect.bottom -= fLayoutData->bottomInset;
+
+	return rect;
+}
+
+
+float
+BTextView::_TextWidth()
+{
+	return fTextRect.Width()
+		+ fLayoutData->leftInset
+		+ fLayoutData->rightInset;
+}
+
+
+float
+BTextView::_TextHeight()
+{
+	return fTextRect.Height()
+		+ fLayoutData->topInset
+		+ fLayoutData->bottomInset;
+}
+
+
+BRect
+BTextView::_TextRect()
+{
+	BRect rect(fTextRect);
+	rect.left -= fLayoutData->leftInset;
+	rect.top -= fLayoutData->topInset;
+	rect.right += fLayoutData->rightInset;
+	rect.bottom += fLayoutData->bottomInset;
+
+	return rect;
+}
+
+
 // #pragma mark - BTextView::TextTrackState