Make nano home page according to Ledger app boilerplate

app/src/globals.h

@@ -112,6 +112,8 @@ typedef struct {
     struct {
         bagl_element_t bagls[4 + TZ_SCREEN_LINES_11PX];
     } ux;  /// Config for history screens for nano devices.
+    char expert_mode_state[10];  /// Expert mode state to be displayed in
+                                 /// settings.ENAELED/DISABLED.
 #endif
 
 #ifdef HAVE_NBGL

app/src/ui_home.c

@@ -22,56 +22,48 @@
 #include "app_main.h"
 #include "globals.h"
 #include "ui_home_nbgl.h"
+#include "os.h"
+#include "ux.h"
 
 #ifdef HAVE_BAGL
-/* Prototypes */
+#include "glyphs.h"
 
-static void cb(tz_ui_cb_type_t cb_type);
+UX_STEP_NOCB(ux_menu_ready_step, pnn,
+             {&C_tezos_16px, "Application", "is ready"});
+UX_STEP_NOCB(ux_menu_version_step, bn, {"Version", APPVERSION});
+UX_STEP_CB(ux_menu_settings_step, pb, ui_settings_init(SETTINGS_HOME_PAGE),
+           {&C_icon_coggle, "Settings"});
+UX_STEP_CB(ux_menu_exit_step, pb, app_exit(), {&C_icon_dashboard_x, "Quit"});
 
-/**
- * @brief Callback for home screen stream.
- *
- * @param cb_type one of the 4 home screens (HOME, VERSION, SETTINGS, QUIT) */
-static void
-cb(tz_ui_cb_type_t cb_type)
-{
-    FUNC_ENTER(("cb_type=%u", cb_type));
+// FLOW for the main menu:
+// #1 screen: ready
+// #2 screen: version of the app
+// #3 screen: Settings menu
+// #4 screen: quit
+UX_FLOW(ux_menu_main_flow, &ux_menu_ready_step, &ux_menu_version_step,
+        &ux_menu_settings_step, &ux_menu_exit_step, FLOW_LOOP);
 
-    switch (cb_type) {
-    case SCREEN_HOME:
-    case SCREEN_VERSION:
-        break;
-    case SCREEN_SETTINGS:
-        ui_settings_init(SETTINGS_HOME_PAGE);
-        break;
-    case SCREEN_QUIT:
-        app_exit();
+void
+ui_home_init(void)
+{
+    FUNC_ENTER(("void"));
+    // reserve a display stack slot if none yet
+    if (G_ux.stack_count == 0) {
+        ux_stack_push();
     }
 
+    ux_flow_init(0, ux_menu_main_flow, NULL);
+
     FUNC_LEAVE();
 }
-
 #endif  // HAVE_BAGL
 
+#ifdef HAVE_NBGL
 void
 ui_home_init(void)
 {
     FUNC_ENTER(("void"));
-#ifdef HAVE_BAGL
-    tz_ui_stream_init(cb);
-    tz_ui_stream_push(SCREEN_HOME, "Application", "is ready",
-                      TZ_UI_LAYOUT_HOME_N, TZ_UI_ICON_NONE);
-    tz_ui_stream_push(SCREEN_VERSION, "Version", APPVERSION,
-                      TZ_UI_LAYOUT_HOME_BN, TZ_UI_ICON_NONE);
-    tz_ui_stream_push(SCREEN_SETTINGS, "Settings", "", TZ_UI_LAYOUT_HOME_PB,
-                      TZ_UI_ICON_SETTINGS);
-    tz_ui_stream_push(SCREEN_QUIT, "Quit?", "", TZ_UI_LAYOUT_HOME_PB,
-                      TZ_UI_ICON_DASHBOARD);
-    tz_ui_stream_close();
-    tz_ui_stream_start();
-#elif defined(HAVE_NBGL)
     tz_ui_home_redisplay();
-#endif
-
     FUNC_LEAVE();
 }
+#endif  // HAVE_NBGL

app/src/ui_settings.c

@@ -19,46 +19,39 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
+#ifdef HAVE_BAGL
 #include "globals.h"
 
-static void cb(tz_ui_cb_type_t cb_type);
-
-#define EXPERT_MODE 0x01
-#define BACK        0x02
-
 static void
-cb(tz_ui_cb_type_t cb_type)
+expert_mode_toggle()
 {
-    FUNC_ENTER(("cb_type=%u", cb_type));
-    switch (cb_type) {
-    case EXPERT_MODE:
-        toggle_expert_mode();
-        ui_settings_init(SETTINGS_HOME_PAGE);
-        break;
-    case BACK:
-        ui_home_init();
-        break;
-    }
+    FUNC_ENTER();
+    toggle_expert_mode();
+    ui_settings_init(SETTINGS_HOME_PAGE);
+    FUNC_LEAVE();
 }
 
+UX_STEP_CB(ux_expert_mode_step, bn, expert_mode_toggle(),
+           {"Expert mode", global.expert_mode_state});
+UX_STEP_CB(ux_back_step, pb, ui_home_init(), {&C_icon_back, "Back"});
+
+UX_FLOW(ux_expert_mode_flow, &ux_expert_mode_step, &ux_back_step, FLOW_LOOP);
+
 void
-ui_settings_init(int16_t page)
+ui_settings_init(__attribute__((unused)) int16_t page)
 {
-    const char *exp_mode = "DISABLED";
-
-    FUNC_ENTER(("void"));
+    FUNC_ENTER(("Page number: %d", page));
 
     if (N_settings.expert_mode) {
-        exp_mode = "ENABLED";
+        strncpy(global.expert_mode_state, "ENABLED",
+                sizeof(global.expert_mode_state));
+    } else {
+        strncpy(global.expert_mode_state, "DISABLED",
+                sizeof(global.expert_mode_state));
     }
 
-    tz_ui_stream_init(cb);
-    tz_ui_stream_push(EXPERT_MODE, "Expert mode", exp_mode,
-                      TZ_UI_LAYOUT_HOME_BN, TZ_UI_ICON_NONE);
-    tz_ui_stream_push(BACK, "Back", "", TZ_UI_LAYOUT_HOME_PB,
-                      TZ_UI_ICON_BACK);
-    tz_ui_stream_close();
-    global.stream.current = page;
-    tz_ui_stream_start();
+    ux_flow_init(0, ux_expert_mode_flow, NULL);
     FUNC_LEAVE();
 }
+
+#endif

tests/integration/nano/test_basic.py

@@ -32,21 +32,25 @@ def test_basic(app):
     app.assert_screen(Screen.Version)
     app.backend.left_click()
     app.assert_screen(Screen.Home)
-    app.backend.left_click()
-    app.assert_screen(Screen.Home)
     app.backend.both_click()
     app.assert_screen(Screen.Home)
+    app.backend.left_click()
+    app.assert_screen(Screen.Quit)
+    app.backend.right_click()
+    app.assert_screen(Screen.Home)
     app.backend.right_click()
     app.assert_screen(Screen.Version)
     app.backend.right_click()
     app.assert_screen(Screen.Settings)
     app.backend.right_click()
     app.assert_screen(Screen.Quit)
     app.backend.right_click()
-    app.assert_screen(Screen.Quit)
+    app.assert_screen(Screen.Home)
+    app.backend.right_click()
+    app.assert_screen(Screen.Version)
 
     # Check Settings menu operation
-    app.backend.left_click()
+    app.backend.right_click()
     app.assert_screen(Screen.Settings)
     app.backend.both_click()
     app.assert_screen(Screen.Settings_expert_mode_disabled)
@@ -60,9 +64,11 @@ def test_basic(app):
     app.assert_screen(Screen.Settings_expert_mode_disabled)
     app.backend.right_click()
     app.assert_screen(Screen.Settings_back)
+    app.backend.right_click()
+    app.assert_screen(Screen.Settings_expert_mode_disabled)
+    app.backend.left_click()
+    app.assert_screen(Screen.Settings_back)
     app.backend.both_click()
     app.assert_screen(Screen.Home)
-    app.backend.right_click()
-    app.backend.right_click()
-    app.backend.right_click()
+    app.backend.left_click()
     app._quit()