show tab button in help and fix help for diff (fixes #48)

Author: Stephan Dilly

src/app.rs

@@ -415,6 +415,15 @@ impl App {
             );
         }
 
+        res.push(
+            CommandInfo::new(
+                commands::TOGGLE_TABS,
+                true,
+                !self.any_popup_visible(),
+            )
+            .hidden(),
+        );
+
         res.push(
             CommandInfo::new(
                 commands::QUIT,

src/components/diff.rs

@@ -350,16 +350,15 @@ impl Component for DiffComponent {
             .hidden(),
         );
 
-        let cmd_text = if self.current.is_stage {
-            commands::DIFF_HUNK_REMOVE
-        } else {
-            commands::DIFF_HUNK_ADD
-        };
-
         out.push(CommandInfo::new(
-            cmd_text,
+            commands::DIFF_HUNK_REMOVE,
             self.selected_hunk.is_some(),
-            self.focused,
+            self.focused && self.current.is_stage,
+        ));
+        out.push(CommandInfo::new(
+            commands::DIFF_HUNK_ADD,
+            self.selected_hunk.is_some(),
+            self.focused && !self.current.is_stage,
         ));
 
         CommandBlocking::PassingOn

src/strings.rs

@@ -24,6 +24,12 @@ pub mod commands {
     static CMD_GROUP_CHANGES: &str = "Changes";
     static CMD_GROUP_COMMIT: &str = "Commit";
 
+    ///
+    pub static TOGGLE_TABS: CommandText = CommandText::new(
+        "Tabs [tabs]",
+        "switch top level tabs",
+        CMD_GROUP_GENERAL,
+    );
     ///
     pub static HELP_OPEN: CommandText = CommandText::new(
         "Help [h]",