1 files changed, 77 insertions, 0 deletions
diff --git a/src/app.rs b/src/app.rs
new file mode 100644
index 0000000..eaaccc8
--- /dev/null
+++ b/src/app.rs
@@ -0,0 +1,77 @@
+use crate::input::{InputMode, InputParam, Row};
+
+pub struct App {
+    pub tab_index: usize,
+    pub tab_titles: Vec<&'static str>,
+
+    pub rows: Vec<Row>,
+    pub selected_row: usize,
+    pub selected_column: InputParam,
+
+    pub input_mode: InputMode,
+}
+
+impl App {
+    pub fn next_tab(&mut self) {
+        self.tab_index = (self.tab_index + 1) % self.tab_titles.len();
+    }
+
+    pub fn previous_tab(&mut self) {
+        if self.tab_index > 0 {
+            self.tab_index -= 1;
+        } else {
+            self.tab_index = self.tab_titles.len() - 1;
+        }
+    }
+
+    pub fn next_row(&mut self) {
+        if self.selected_row < self.rows.len() - 1 {
+            self.selected_row += 1;
+        } else {
+            self.selected_row = 0;
+        }
+    }
+
+    pub fn previous_row(&mut self) {
+        if self.selected_row > 0 {
+            self.selected_row -= 1;
+        } else {
+            self.selected_row = self.rows.len() - 1;
+        }
+    }
+
+    pub fn next_column(&mut self) {
+        self.selected_column = self.selected_column.next();
+    }
+
+    pub fn previous_column(&mut self) {
+        self.selected_column = self.selected_column.previous();
+    }
+
+    pub fn insert_row(&mut self) {
+        let index = self.selected_row;
+        self.rows.insert(index, self.rows[index].clone());
+    }
+
+    pub fn remove_row(&mut self) {
+        if self.rows.len() > 1 {
+            self.rows.remove(self.selected_row);
+            if self.selected_row > 0 {
+                self.selected_row -= 1;
+            }
+        }
+    }
+}
+
+impl Default for App {
+    fn default() -> App {
+        App {
+            tab_index: 0,
+            tab_titles: vec!["Input", "Config"],
+            rows: vec![Row::default()],
+            selected_row: 0,
+            selected_column: InputParam::Rpm(String::new()),
+            input_mode: InputMode::Normal,
+        }
+    }
+}