fix weird behavior on empty placeholder

src/textarea.rs

@@ -61,7 +61,7 @@ pub struct TextArea<'a> {
     #[cfg(feature = "search")]
     search: Search,
     alignment: Alignment,
-    pub(crate) placeholder: Option<String>,
+    pub(crate) placeholder: String,
     pub(crate) placeholder_style: Style,
 }
 
@@ -160,7 +160,7 @@ impl<'a> TextArea<'a> {
             #[cfg(feature = "search")]
             search: Search::default(),
             alignment: Alignment::Left,
-            placeholder: None,
+            placeholder: String::new(),
             placeholder_style: Style::default().fg(Color::DarkGray),
         }
     }
@@ -1240,7 +1240,7 @@ impl<'a> TextArea<'a> {
 
     /// sets the placeholder text
     pub fn set_placeholder(&mut self, placeholder: String) {
-        self.placeholder = Some(placeholder);
+        self.placeholder = placeholder;
     }
 
     pub fn set_placeholder_style(&mut self, style: Style) {

src/widget.rs

@@ -119,11 +119,11 @@ impl<'a> Widget for Renderer<'a> {
         let top_row = next_scroll_top(top_row, cursor.0 as u16, height);
         let top_col = next_scroll_top(top_col, cursor.1 as u16, width);
 
-        let (text, style) = match &self.0.placeholder {
-            Some(text) if self.0.is_empty() => {
-                (Text::from(text.as_str()), self.0.placeholder_style) // When a placeholder is set and no text is in textarea
-            }
-            _ => (self.text(top_row as usize, height as usize), self.0.style()),
+        let (text, style) = if !self.0.placeholder.is_empty() && self.0.is_empty() {
+            let text = Text::from(self.0.placeholder.as_str());
+            (text, self.0.placeholder_style)
+        } else {
+            (self.text(top_row as usize, height as usize), self.0.style())
         };
 
         // To get fine control over the text color and the surrrounding block they have to be rendered separately