wip: the beginnings of ui for modifying colors

src/book/mod.rs

@@ -251,6 +251,12 @@ impl Book {
         }
     }
 
+    pub fn set_cell_style(&mut self, style: &Style, sheet: u32, cell: &Address) -> Result<()> {
+        self.model.set_cell_style(sheet, cell.row as i32, cell.col as i32, style)
+            .map_err(|s| anyhow!("Unable to format cell {}", s))?;
+        Ok(())
+    }
+
     /// Get a cells rendered content for display.
     pub fn get_cell_addr_rendered(&self, Address { row, col }: &Address) -> Result<String> {
         Ok(self

src/ui/cmd.rs

@@ -7,6 +7,9 @@ pub enum Cmd<'a> {
     Write(Option<&'a str>),
     InsertRows(usize),
     InsertColumns(usize),
+    ColorRows(usize, &'a str),
+    ColorColumns(usize, &'a str),
+    ColorCell(&'a str),
     RenameSheet(Option<usize>, &'a str),
     NewSheet(Option<&'a str>),
     SelectSheet(&'a str),
@@ -51,6 +54,9 @@ pub fn parse<'cmd, 'i: 'cmd>(input: &'i str) -> Result<Option<Cmd<'cmd>>, &'stat
     if let Some(cmd) = try_consume_rename_sheet(cursor.clone())? {
         return Ok(Some(cmd));
     }
+    if let Some(cmd) = try_consume_color_cell(cursor.clone())? {
+        return Ok(Some(cmd));
+    }
     Ok(None)
 }
 
@@ -138,6 +144,28 @@ fn try_consume_select_sheet<'cmd, 'i: 'cmd>(
     return Ok(Some(Cmd::SelectSheet(arg)));
 }
 
+fn try_consume_color_cell<'cmd, 'i: 'cmd>(
+    mut input: StrCursor<'i>,
+) -> Result<Option<Cmd<'cmd>>, &'static str> {
+    const SHORT: &'static str = "cc";
+    const LONG: &'static str = "color-cell";
+    if compare(input.clone(), LONG) {
+        input.seek(LONG.len());
+    } else if compare(input.clone(), SHORT) {
+        input.seek(SHORT.len());
+    } else {
+        return Ok(None);
+    };
+    if input.remaining() > 0 && !is_ws(&mut input) {
+        return Err("Invalid command: Did you mean to type `color-cell <color>`?");
+    }
+    let arg = input.span(0..).trim();
+    if arg.len() == 0 {
+        return Err("Invalid command: Did you mean to type `color-cell <color>`?");
+    }
+    return Ok(Some(Cmd::ColorCell(arg)));
+}
+
 fn try_consume_insert_row<'cmd, 'i: 'cmd>(
     mut input: StrCursor<'i>,
 ) -> Result<Option<Cmd<'cmd>>, &'static str> {

src/ui/mod.rs

@@ -465,6 +465,21 @@ impl<'ws> Workspace<'ws> {
             Ok(Some(Cmd::Quit)) => {
                 Ok(Some(ExitCode::SUCCESS))
             }
+            Ok(Some(Cmd::ColorRows(_count, _color))) => {
+                Ok(Some(ExitCode::FAILURE))
+            }
+            Ok(Some(Cmd::ColorColumns(_count, _color))) => {
+                Ok(Some(ExitCode::FAILURE))
+            }
+            Ok(Some(Cmd::ColorCell(color))) => {
+                let address = self.book.location.clone();
+                let sheet = self.book.current_sheet;
+                let mut style = self.book.get_cell_style(sheet, &address)
+                    .expect("I think this should be impossible.").clone();
+                style.fill.bg_color = Some(color.to_string());
+                self.book.set_cell_style(&style, sheet, &address)?;
+                Ok(None)
+            }
             Ok(None) => {
                 self.enter_dialog_mode(vec![format!("Unrecognized commmand {}", cmd_text)]);
                 Ok(None)