[Add] Split Focus From UI

src/terms/focus.rs

@@ -0,0 +1,54 @@
+use crate::terms::consent_state::ConsentState;
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Focus {
+    Eula,
+    Tos,
+    Pp,
+    Cancel,
+    Continue,
+    ContinueAll,
+}
+impl Focus {
+    pub fn next(&mut self, state: ConsentState) {
+        *self = match self {
+            Focus::Eula => Focus::Tos,
+            Focus::Tos => Focus::Pp,
+            Focus::Pp => Focus::Cancel,
+            Focus::Cancel => {
+                if state.can_continue() {
+                    Focus::Continue
+                } else {
+                    Focus::Eula
+                }
+            }
+            Focus::Continue => {
+                if state.can_continue_all() {
+                    Focus::ContinueAll
+                } else {
+                    Focus::Eula
+                }
+            }
+            Focus::ContinueAll => Focus::Eula,
+        };
+    }
+
+    pub fn prev(&mut self, state: ConsentState) {
+        *self = match self {
+            Focus::Eula => {
+                if state.can_continue_all() {
+                    Focus::ContinueAll
+                } else if state.can_continue() {
+                    Focus::Continue
+                } else {
+                    Focus::Cancel
+                }
+            }
+            Focus::Tos => Focus::Eula,
+            Focus::Pp => Focus::Tos,
+            Focus::Cancel => Focus::Pp,
+            Focus::Continue => Focus::Cancel,
+            Focus::ContinueAll => Focus::Continue,
+        };
+    }
+}