diff --git a/_wip/attrstr_metrics/numlinesbyterange b/_wip/attrstr_metrics/numlinesbyterange
new file mode 100644
index 00000000..46a7ba21
--- /dev/null
+++ b/_wip/attrstr_metrics/numlinesbyterange
@@ -0,0 +1,60 @@
+darwin
+int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
+{
+	return CFArrayGetCount([tl->forLines lines]);
+}
+
+void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
+{
+	CTLineRef lr;
+	CFRange range;
+
+	lr = (CTLineRef) CFArrayGetValueAtIndex([tl->forLines lines], line);
+	range = CTLineGetStringRange(lr);
+	*start = tl->u16tou8[range.location];
+	if (tl->empty)
+		*end = *start;
+	else
+		*end = tl->u16tou8[range.location + range.length];
+}
+
+
+unix
+int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
+{
+	return pango_layout_get_line_count(tl->layout);
+}
+
+void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
+{
+	PangoLayoutLine *pll;
+
+	pll = pango_layout_get_line_readonly(tl->layout, line);
+	*start = pll->start_index;
+	*end = pll->start_index + pll->length;
+	// TODO unref pll?
+}
+
+
+windows
+int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
+{
+return 0;
+#if 0
+TODO
+	return tl->nLines;
+#endif
+}
+
+// DirectWrite doesn't provide a direct way to do this, so we have to do this manually
+// TODO does that comment still apply here or to the code at the top of this file?
+void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
+{
+#if 0
+TODO
+	*start = tl->lineInfo[line].startPos;
+	*start = tl->u16tou8[*start];
+	*end = tl->lineInfo[line].endPos - tl->lineInfo[line].newlineCount;
+	*end = tl->u16tou8[*end];
+#endif
+}
diff --git a/old_ui_attrstr.h b/_wip/attrstr_metrics/old_ui_attrstr.h
similarity index 85%
rename from old_ui_attrstr.h
rename to _wip/attrstr_metrics/old_ui_attrstr.h
index 75df996d..ebe9308d 100644
--- a/old_ui_attrstr.h
+++ b/_wip/attrstr_metrics/old_ui_attrstr.h
@@ -31,6 +31,15 @@ struct uiDrawTextLayoutLineMetrics {
 	// TODO trailing whitespace?
 };
 
+// uiDrawTextLayoutNumLines() returns the number of lines in tl.
+// This number will always be greater than or equal to 1; a text
+// layout with no text only has one line.
+_UI_EXTERN int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl);
+
+// uiDrawTextLayoutLineByteRange() returns the byte indices of the
+// text that falls into the given line of tl as [start, end).
+_UI_EXTERN void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end);
+
 _UI_EXTERN void uiDrawTextLayoutLineGetMetrics(uiDrawTextLayout *tl, int line, uiDrawTextLayoutLineMetrics *m);
 
 // TODO rewrite this documentation
diff --git a/darwin/drawtext.m b/darwin/drawtext.m
index 5406617c..c04b402b 100644
--- a/darwin/drawtext.m
+++ b/darwin/drawtext.m
@@ -212,22 +212,3 @@ void uiDrawTextLayoutExtents(uiDrawTextLayout *tl, double *width, double *height
 	[tl->frame returnWidth:width height:NULL];
 	[tl->forLines returnWidth:NULL height:height];
 }
-
-int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
-{
-	return CFArrayGetCount([tl->forLines lines]);
-}
-
-void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
-{
-	CTLineRef lr;
-	CFRange range;
-
-	lr = (CTLineRef) CFArrayGetValueAtIndex([tl->forLines lines], line);
-	range = CTLineGetStringRange(lr);
-	*start = tl->u16tou8[range.location];
-	if (tl->empty)
-		*end = *start;
-	else
-		*end = tl->u16tou8[range.location + range.length];
-}
diff --git a/ui_attrstr.h b/ui_attrstr.h
index 66b0fb4b..f4302cd5 100644
--- a/ui_attrstr.h
+++ b/ui_attrstr.h
@@ -484,15 +484,6 @@ _UI_EXTERN void uiDrawText(uiDrawContext *c, uiDrawTextLayout *tl, double x, dou
 // function to get the actual size of the text layout.
 _UI_EXTERN void uiDrawTextLayoutExtents(uiDrawTextLayout *tl, double *width, double *height);
 
-// uiDrawTextLayoutNumLines() returns the number of lines in tl.
-// This number will always be greater than or equal to 1; a text
-// layout with no text only has one line.
-_UI_EXTERN int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl);
-
-// uiDrawTextLayoutLineByteRange() returns the byte indices of the
-// text that falls into the given line of tl as [start, end).
-_UI_EXTERN void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end);
-
 // TODO metrics functions
 
 // TODO number of lines visible for clipping rect, range visible for clipping rect?
diff --git a/unix/drawtext.c b/unix/drawtext.c
index 5792f9e0..477e9ca3 100644
--- a/unix/drawtext.c
+++ b/unix/drawtext.c
@@ -79,18 +79,3 @@ void uiDrawTextLayoutExtents(uiDrawTextLayout *tl, double *width, double *height
 	*width = pangoToCairo(logical.width);
 	*height = pangoToCairo(logical.height);
 }
-
-int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
-{
-	return pango_layout_get_line_count(tl->layout);
-}
-
-void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
-{
-	PangoLayoutLine *pll;
-
-	pll = pango_layout_get_line_readonly(tl->layout, line);
-	*start = pll->start_index;
-	*end = pll->start_index + pll->length;
-	// TODO unref pll?
-}
diff --git a/windows/drawtext.cpp b/windows/drawtext.cpp
index 56a7dfbb..85accab1 100644
--- a/windows/drawtext.cpp
+++ b/windows/drawtext.cpp
@@ -534,25 +534,3 @@ void uiDrawTextLayoutExtents(uiDrawTextLayout *tl, double *width, double *height
 	// TODO make sure the behavior of this on empty strings is the same on all platforms (ideally should be 0-width, line height-height; TODO note this in the docs too)
 	*height = metrics.height;
 }
-
-int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
-{
-return 0;
-#if 0
-TODO
-	return tl->nLines;
-#endif
-}
-
-// DirectWrite doesn't provide a direct way to do this, so we have to do this manually
-// TODO does that comment still apply here or to the code at the top of this file?
-void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
-{
-#if 0
-TODO
-	*start = tl->lineInfo[line].startPos;
-	*start = tl->u16tou8[*start];
-	*end = tl->lineInfo[line].endPos - tl->lineInfo[line].newlineCount;
-	*end = tl->u16tou8[*end];
-#endif
-}