Improve compatibility for SetRichText (#976)

- support escaped string literal
- maximum character limit added
- fix missing preserve character in some case

Co-authored-by: xuri <xuri.me@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/errors.go b/errors.go
index 6b32563..0edb697 100644
--- a/errors.go
+++ b/errors.go
@@ -45,7 +45,7 @@ var (
 	ErrColumnNumber = errors.New("column number exceeds maximum limit")
 	// ErrColumnWidth defined the error message on receive an invalid column
 	// width.
-	ErrColumnWidth = errors.New("the width of the column must be smaller than or equal to 255 characters")
+	ErrColumnWidth = fmt.Errorf("the width of the column must be smaller than or equal to %d characters", MaxColumnWidth)
 	// ErrOutlineLevel defined the error message on receive an invalid outline
 	// level number.
 	ErrOutlineLevel = errors.New("invalid outline level")
@@ -111,4 +111,7 @@ var (
 	// ErrDataValidationRange defined the error message on set decimal range
 	// exceeds limit.
 	ErrDataValidationRange = errors.New("data validation range exceeds limit")
+	// ErrCellCharsLength defined the error message for receiving a cell
+	// characters length that exceeds the limit.
+	ErrCellCharsLength = fmt.Errorf("cell value must be 0-%d characters", TotalCellChars)
 )