factor out modules; modal -> dialog

src/view/dialog.rs

@@ -0,0 +1,50 @@
+use crate::*;
+
+impl Taggart {
+    pub(crate) const FG_MODAL: Color = Color::Rgb(255, 255, 255);
+    pub(crate) const BG_MODAL: Color = Color::Rgb(0, 0, 0);
+    fn dialog (content: impl Content<TuiOut>) -> impl Content<TuiOut> {
+        let pos    = |x|Fill::xy( Align::c(x));
+        let style  = |x|Tui::modify(false, Modifier::DIM, Tui::fg_bg(Self::FG_MODAL, Self::BG_MODAL, x));
+        let border = |x|Margin::xy(1, 1, Bsp::b(Border(true, Lozenge(true, Default::default())), x));
+        let bg     = |x|Bsp::a(x, Repeat(" "));
+        pos(style(border(bg(content))))
+    }
+    fn dialog_help (&self) {
+    }
+    fn dialog_save (&self, value: u8) {
+        let choices = [
+            if value == 0 { "[ Clear changes ]"      } else { "  Clear changes  " },
+            if value == 1 { "[ Continue editing ]"   } else { "  Continue editing  " },
+            if value == 2 { "[ Write and continue ]" } else { "  Write and continue  " },
+        ];
+        Self::dialog(Bsp::s(
+            format!("Save {} change(s)?", self.tasks.len()),
+            Bsp::s("", Bsp::e(choices[0], Bsp::e(choices[1], choices[2])))));
+    }
+    fn dialog_quit (&self, value: u8) {
+        let choices = [
+            if value == 0 { "[ Exit without saving ]" } else { "  Exit without saving  " },
+            if value == 1 { "[ Cancel ]"              } else { "  Cancel  " },
+            if value == 2 { "[ Write and exit ]"      } else { "  Write and exit  " },
+        ];
+        Self::dialog(Bsp::s(
+            format!("Save {} change(s) before exiting?", self.tasks.len()),
+            Bsp::s("", Bsp::e(choices[0], Bsp::e(choices[1], choices[2])))));
+    }
+    pub fn render_dialog (&self, to: &mut TuiOut) {
+        match self.mode {
+            Some(Mode::Save { value }) => {
+                to.tint_all(Color::Rgb(96,96,96), Color::Rgb(48,48,48), Modifier::DIM);
+                Content::render(&self.dialog_save(value), to)
+            },
+            Some(Mode::Quit { value }) => {
+                to.tint_all(Color::Rgb(96,96,96), Color::Rgb(48,48,48), Modifier::DIM);
+                Content::render(&self.dialog_quit(value), to)
+            },
+            Some(Mode::Help { .. }) => {
+            },
+            _ => {},
+        }
+    }
+}