More documentation

examples/editor-libcosmic/src/text_box.rs

@@ -249,7 +249,9 @@ where
                 },
                 MouseEvent::WheelScrolled { delta } => match delta {
                     ScrollDelta::Lines { x, y } => {
-                        buffer.action(TextAction::Scroll((-y * 6.0) as i32));
+                        buffer.action(TextAction::Scroll {
+                            lines: (-y * 6.0) as i32,
+                        });
                         Status::Captured
                     },
                     _ => Status::Ignored,

examples/editor-orbclient/src/main.rs

@@ -227,7 +227,9 @@ fn main() {
                     );
                 }
                 EventOption::Scroll(event) => {
-                    buffer.action(TextAction::Scroll(-event.y * 3));
+                    buffer.action(TextAction::Scroll {
+                        lines: -event.y * 3,
+                    });
                 }
                 EventOption::Quit(_) => return,
                 _ => (),

src/buffer.rs

@@ -9,17 +9,28 @@ use crate::{FontLayoutLine, FontMatches, FontShapeLine};
 /// An action to perform on a [TextBuffer]
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum TextAction {
+    /// Move cursor left
     Left,
+    /// Move cursor right
     Right,
+    /// Move cursor up
     Up,
+    /// Move cursor down
     Down,
+    /// Delete text behind cursor
     Backspace,
+    /// Delete text in front of cursor
     Delete,
+    /// Scroll up one page
     PageUp,
+    /// Scroll down one page
     PageDown,
+    /// Insert character at cursor
     Insert(char),
+    /// Mouse click at specified position
     Click { x: i32, y: i32 },
-    Scroll(i32),
+    /// Scroll specified number of lines
+    Scroll { lines: i32 },
 }
 
 /// Current cursor location
@@ -87,7 +98,7 @@ pub struct TextBuffer<'a> {
     width: i32,
     height: i32,
     scroll: i32,
-    pub cursor: TextCursor,
+    cursor: TextCursor,
     pub redraw: bool,
 }
 
@@ -220,6 +231,11 @@ impl<'a> TextBuffer<'a> {
         log::debug!("relayout line {}: {:?}", line_i.get(), duration);
     }
 
+    /// Get the current cursor position
+    pub fn cursor(&self) -> TextCursor {
+        self.cursor
+    }
+
     /// Get the current [TextMetrics]
     pub fn metrics(&self) -> TextMetrics {
         self.metrics
@@ -387,7 +403,7 @@ impl<'a> TextBuffer<'a> {
             TextAction::Click { x, y } => {
                 self.click(x, y);
             },
-            TextAction::Scroll(lines) => {
+            TextAction::Scroll { lines } => {
                 self.scroll += lines;
                 self.redraw = true;
                 self.shape_until_scroll();