From ee2bccc5c87a77cd7a60e07eb89ab2fa7cbd7f73 Mon Sep 17 00:00:00 2001
From: Alexander Zhylin <zheiling@hotmail.com>
Date: Mon, 20 Apr 2026 15:23:12 +0300
Subject: [PATCH] UI: finishes callback processing in main_window, key input
 callbacks and draw bottom bar

---
 src/connection.c               |  4 +--
 src/main.h                     |  1 +
 src/main_window.c              |  9 +++---
 src/modals/login_credentials.c |  2 +-
 src/modals/login_option.c      |  2 +-
 src/query.c                    | 19 +++++++----
 src/server.c                   |  2 +-
 src/widget/app.c               | 54 +++++++++++++++++--------------
 src/widget/app.h               |  3 +-
 src/widget/dialogue.c          |  2 +-
 src/widget/file_list.c         | 13 ++++----
 src/widget/file_list.h         |  3 +-
 src/widget/fs_file_list.c      | 59 +++++++++++++++++++++++++++-------
 src/widget/fs_file_list.h      |  3 +-
 src/widget_core/widget_core.h  |  1 +
 15 files changed, 115 insertions(+), 62 deletions(-)

diff --git a/src/connection.c b/src/connection.c
index e7071a6..e51ed21 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -26,7 +26,7 @@ void connect_to_server(w_app_t *app) {
     w_app_destroy(app, 2);
   }
   app->params->is_connected = TRUE;
-  w_app_print_bars(app);
+  w_app_draw_bars(app);
 }
 
 void init_params(params_t *params) {
@@ -59,7 +59,7 @@ void get_ip_port(params_t *params, char *ip, char *port) {
 
 void close_session(int sd) { close(sd); }
 
-int init_client() {
+int init_client(void) {
   int res;
   int cs = socket(AF_INET, SOCK_STREAM, 0);
   struct sockaddr_in client;
diff --git a/src/main.h b/src/main.h
index 1c07d3d..1a5fa0b 100644
--- a/src/main.h
+++ b/src/main.h
@@ -95,6 +95,7 @@ typedef struct main_window {
   int32_t (*cb_b_press) (void *app, void *args); /* callback on button press */
   void (*cb_refresh) (void *app); /* refresh callback */
   struct action_key *b_keys;
+  int32_t b_keys_len;
 } main_window_t;
 
 typedef struct query_args {
diff --git a/src/main_window.c b/src/main_window.c
index 370aa03..c18197f 100644
--- a/src/main_window.c
+++ b/src/main_window.c
@@ -1,5 +1,6 @@
 #include "main_window.h"
 #include "fs_file_list.h"
+#include "server.h"
 
 void main_window_set(w_app_t *app, enum main_window_type type) {
   if (app->main_ui.ui != NULL) {
@@ -8,12 +9,11 @@ void main_window_set(w_app_t *app, enum main_window_type type) {
   app->main_ui.type = type;
   switch (type) {
   case mw_fl_server:
-    app->main_ui.ui = w_fl_init(app);
-    app->active_callback = w_fl_cb;
+    w_fl_init(app);
+    app->query_args->state = S_FILE_LIST;
     break;
   case mw_fl_local:
-    app->main_ui.ui = w_lfl_init_win(app);
-    app->active_callback = w_lfl_cb;
+    w_lfl_init_win(app);
     break;
   case mw_f_desc:
     break;
@@ -33,6 +33,7 @@ void main_window_draw(w_app_t *app) {
   case mw_f_desc:
     break;
   }
+  w_app_draw_bbar(app);
 }
 
 void main_window_destroy(w_app_t *app) {
diff --git a/src/modals/login_credentials.c b/src/modals/login_credentials.c
index a610761..8bec29d 100644
--- a/src/modals/login_credentials.c
+++ b/src/modals/login_credentials.c
@@ -35,7 +35,7 @@ void init_login_credentials_modal_cb(w_cb_args_t *args) {
       server_send_string(app->query_args, app->params->uname);
       app->query_args->state = S_WAIT_SERVER;
       d->needs_destroy = true;
-      w_app_print_bars(app);
+      w_app_draw_bars(app);
       break;
     case 2:
       app->query_args->state = S_ASK_LOGIN_TYPE;
diff --git a/src/modals/login_option.c b/src/modals/login_option.c
index edc4f73..1019d4f 100644
--- a/src/modals/login_option.c
+++ b/src/modals/login_option.c
@@ -29,7 +29,7 @@ void login_modal_option_cb(w_cb_args_t *args) {
       strcpy(app->params->uname, "anonymous");
       server_send_string(app->query_args, app->params->uname);
       app->query_args->state = S_WAIT_SERVER;
-      w_app_print_bars(app);
+      w_app_draw_bars(app);
       break;
     case 2:
       d->needs_destroy = true;
diff --git a/src/query.c b/src/query.c
index 9d5be8f..38a0b6d 100644
--- a/src/query.c
+++ b/src/query.c
@@ -39,9 +39,9 @@ int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args);
 
 #define EXIT_APP(message, app, exit_code)                                      \
   {                                                                            \
-    w_alert(message);                                                            \
+    w_alert(message);                                                          \
     close_session(app->params->sd);                                            \
-    w_app_destroy(app, exit_code);                                               \
+    w_app_destroy(app, exit_code);                                             \
   }
 
 void query_loop(w_app_t *app) {
@@ -112,8 +112,14 @@ void query_loop(w_app_t *app) {
     }
 
     if (FD_ISSET(STDIN_FILENO, &readfds)) {
-      if (ERR == process_user_input(app, &d_args)) {
-        EXIT_APP("*** error while processing user input ***", app, 4)
+      if (app->main_ui.cb_b_press != NULL) {
+        if (ERR == app->main_ui.cb_b_press(app, &d_args)) {
+          EXIT_APP("*** error while processing user input ***", app, 4)
+        }
+      } else {
+        if (ERR == process_user_input(app, &d_args)) {
+          EXIT_APP("*** error while processing user input ***", app, 4)
+        }
       }
     }
   }
@@ -131,8 +137,9 @@ void wait_register(query_args_t *q_args) {
 int upload_confirm_cb(w_app_t *app, char *query, int q_len) {
   if (!strncmp("finished\n", query, sizeof("finished\n") - 1)) {
     w_ui_file_list_t *fui = (w_ui_file_list_t *)app->query_args->main_ui->ui;
-    w_notification("File upload", dc_normal, "File %s is uploaded to the server!",
-                 app->query_args->file->name);
+    w_notification("File upload", dc_normal,
+                   "File %s is uploaded to the server!",
+                   app->query_args->file->name);
     clear_file_in_query(app->query_args);
     app->query_args->state = S_FILE_LIST;
     app->modal.needs_destroy = true;
diff --git a/src/server.c b/src/server.c
index 15c801a..8cd227c 100644
--- a/src/server.c
+++ b/src/server.c
@@ -47,7 +47,7 @@ int server_wait_reg_confirm_cb(w_app_t *app, char *line, int l_len) {
             "Welcome, %s!",
             app->params->uname);
     w_notification("Registration", dc_normal, query);
-    w_app_print_bars(app);
+    w_app_draw_bars(app);
     return 0;
   } else {
     q_args->state = S_ASK_REGISTER;
diff --git a/src/widget/app.c b/src/widget/app.c
index 1b73dab..d58dc22 100644
--- a/src/widget/app.c
+++ b/src/widget/app.c
@@ -33,11 +33,9 @@ w_app_t *w_app_init() {
   _app->modal.win = NULL;
   _app->modal.is_initiated = 0;
 
-  /* default callback */
-  _app->active_callback = w_fl_cb;
-
-  /* print decorative bars */
-  w_app_print_bars(_app);
+  /* print top and bottom bars */
+  _app->main_ui.b_keys_len = 0;
+  w_app_draw_bars(_app);
 
   /* here goes box borders */
   w_app_draw_borders(_app);
@@ -96,7 +94,9 @@ int64_t print_bottom_menu_option(WINDOW *win, char *key, char *title, int64_t y,
   return key_len + title_len;
 }
 
-void w_app_print_bars(w_app_t *app) {
+void w_app_draw_bbar(w_app_t *app);
+
+void w_app_draw_bars(w_app_t *app) {
   char top_text[64] = "Hello!";
 
   wattrset(app->win, A_REVERSE);
@@ -116,32 +116,38 @@ void w_app_print_bars(w_app_t *app) {
             ip_addr[1], ip_addr[2], ip_addr[3], app->params->uname);
   }
   mvwprintw(app->win, 1, 2, "%s", top_text);
+  wattroff(app->win, A_REVERSE);
 
   /* add content to the bottom bar */
+  if (app->main_ui.b_keys_len > 0) {
+    w_app_draw_bbar(app);
+  }
+}
 
-  struct action_key action_keys[] = {
-      {.key = "F1", .title = "Help"},
-      {.key = "U", .title = "Upload"},
-      {.key = "S", .title = "Search"},
-      {.key = "F9", .title = "Quit"},
-  };
-
-  int t_margin = 0;                        /* tab margin */
-  int c_size = app->coordinates.max_x / 4; /* column size */
+void w_app_draw_bbar(w_app_t *app) {
+  wattrset(app->win, A_REVERSE);
+  int t_margin = 0; /* tab margin */
+  int c_size =
+      app->coordinates.max_x / app->main_ui.b_keys_len; /* column size */
   int incr_last = app->coordinates.max_x %
-                  4; /* increment size fo the last element (fill empty space) */
+                  app->main_ui.b_keys_len; /* increment size fo the last element
+                                              (fill empty space) */
 
-  for (int i = 0; i < 3; i++) {
-    struct action_key *k = &action_keys[i];
-    t_margin +=
-        print_bottom_menu_option(app->win, k->key, k->title,
-                                 app->coordinates.cur_y - 2, t_margin, c_size);
+  struct action_key *k = NULL;
+  if (app->main_ui.b_keys_len > 1) {
+    for (int i = 0; i < app->main_ui.b_keys_len - 1; i++) {
+      k = &(app->main_ui.b_keys)[i];
+      t_margin += print_bottom_menu_option(app->win, k->key, k->title,
+                                           app->coordinates.cur_y - 2, t_margin,
+                                           c_size);
+    }
   }
 
-  t_margin += print_bottom_menu_option(
-      app->win, action_keys[3].key, action_keys[3].title,
-      app->coordinates.cur_y - 2, t_margin, c_size + incr_last);
+  k = &(app->main_ui.b_keys)[app->main_ui.b_keys_len - 1];
 
+  t_margin += print_bottom_menu_option(app->win, k->key, k->title,
+                                       app->coordinates.cur_y - 2, t_margin,
+                                       c_size + incr_last);
   wattroff(app->win, A_REVERSE);
 }
 
diff --git a/src/widget/app.h b/src/widget/app.h
index f4e73ad..0ba7ed4 100644
--- a/src/widget/app.h
+++ b/src/widget/app.h
@@ -31,8 +31,9 @@ w_app_t *w_app_init(void);
 void  w_app_init_nc(void);
 void  w_app_destroy(w_app_t *app, int32_t exit_code);
 void  w_app_draw_borders(w_app_t *app);
-void  w_app_print_bars(w_app_t *app);
+void  w_app_draw_bars(w_app_t *app);
 void  w_app_refresh(w_app_t *app);
 void  w_app_draw_modal(w_app_t *app);
+void  w_app_draw_bbar(w_app_t *app);
 
 #endif // N_APP_H
\ No newline at end of file
diff --git a/src/widget/dialogue.c b/src/widget/dialogue.c
index 1467311..e35a147 100644
--- a/src/widget/dialogue.c
+++ b/src/widget/dialogue.c
@@ -319,7 +319,7 @@ void w_dialogue_destroy(w_dialogue_t *d, void *_app) {
   d->win = NULL;
   d->is_initiated = 0;
   d->needs_destroy = false;
-  app->active_callback = w_fl_cb;
+  app->active_callback = (w_cb_t) app->main_ui.cb_b_press;
   app->query_args->active_dialogue = NULL;
   u_d_arr_ptr_free(&(d->id_map));
   w_app_refresh(app);
diff --git a/src/widget/file_list.c b/src/widget/file_list.c
index 53ccfa7..3cbc7a2 100644
--- a/src/widget/file_list.c
+++ b/src/widget/file_list.c
@@ -19,7 +19,7 @@
 
 void w_fl_reset(w_ui_file_list_t *fl_ui);
 
-void w_fl_cb(w_cb_args_t *args) {
+static void w_fl_cb(w_cb_args_t *args) {
   w_app_t *app = args->app;
   w_ui_file_list_t *fui = app->query_args->main_ui->ui;
   int32_t key = *((int32_t *)args->data);
@@ -133,7 +133,7 @@ static struct action_key action_keys[] = {
     {.key = "F9", .title = "Quit", .code = KEY_F(9)},
 };
 
-int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args) {
+static int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args) {
   int32_t c;
   w_ui_file_list_t *fui = (w_ui_file_list_t *)app->query_args->main_ui->ui;
   c = wgetch(app->win);
@@ -143,8 +143,7 @@ int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args) {
     return OK;
   case 'U':
   case 'u':
-    if (!app->modal.is_initiated && !fui->active_search &&
-        app->main_ui.type != mw_fl_local) {
+    if (!app->modal.is_initiated && !fui->active_search) {
       /* app->query_args->state = S_UPLOAD_FILE_SELECT; */
       main_window_set(app, mw_fl_local);
       main_window_draw(app);
@@ -166,13 +165,15 @@ int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args) {
   return OK;
 }
 
-w_ui_file_list_t *w_fl_init(w_app_t *app) {
+void *w_fl_init(w_app_t *app) {
   w_ui_file_list_t *fui = malloc(sizeof(w_ui_file_list_t));
   app->main_ui.ui = fui;
   app->main_ui.type = mw_fl_server;
   app->main_ui.cb_refresh = w_fl_cb_refresh;
   app->main_ui.b_keys = action_keys;
-  app->main_ui.cb_b_press = process_user_input;
+  app->main_ui.b_keys_len = 4;
+  app->main_ui.cb_b_press = (w_cb_press_t) process_user_input;
+  app->active_callback = w_fl_cb;
   w_init(&(fui->w), NULL, &(app->win), "");
   WINDOW *win_parent = app->win;
   fui->current_idx = 0;
diff --git a/src/widget/file_list.h b/src/widget/file_list.h
index 9c91564..10680f2 100644
--- a/src/widget/file_list.h
+++ b/src/widget/file_list.h
@@ -27,8 +27,7 @@ typedef struct {
 } w_ui_file_list_t;
 
 void              w_fl_draw(w_ui_file_list_t *fl_ui);
-w_ui_file_list_t *w_fl_init(w_app_t *app);
-void              w_fl_cb(w_cb_args_t *args);
+void             *w_fl_init(w_app_t *app);
 void              w_fl_reset(w_ui_file_list_t *fl_ui);
 void              w_fl_destroy(w_ui_file_list_t **fui);
 
diff --git a/src/widget/fs_file_list.c b/src/widget/fs_file_list.c
index 07db581..a3b5e83 100644
--- a/src/widget/fs_file_list.c
+++ b/src/widget/fs_file_list.c
@@ -14,12 +14,13 @@
 #include <unistd.h>
 #include <utils.h>
 
+#include "../main_window.h"
+#include "../server.h"
 #include "alert.h"
-
 #include "fs_file_list.h"
 #include "widget_core.h"
 
-void w_fl_reset(w_lfl_ui_t *fl_ui);
+// void w_fl_reset(w_lfl_ui_t *fl_ui);
 
 struct fl_args {
   char *name;
@@ -186,7 +187,7 @@ void open_selected_item(w_lfl_ui_t *fui, w_cbrp_data *resp_data) {
 
 /* next page */
 void page_next(w_lfl_ui_t *fui) {
-  int count = fui->rows_num;
+  int count = fui->max_lines;
   w_lfl_item_t *n_page_item = fui->page_start;
   if (fui->cur_page < fui->pages_num) {
     for (; count; count--) {
@@ -202,7 +203,7 @@ void page_next(w_lfl_ui_t *fui) {
 
 /* previous page */
 void page_previous(w_lfl_ui_t *fui) {
-  int count = fui->rows_num;
+  int count = fui->max_lines;
   w_lfl_item_t *n_page_item = fui->page_start;
   if (fui->cur_page > 1) {
     for (; count; count--) {
@@ -216,13 +217,13 @@ void page_previous(w_lfl_ui_t *fui) {
   w_lfl_draw(fui);
 }
 
-void w_lfl_cb(w_cb_args_t *args) {
+static void w_lfl_cb(w_cb_args_t *args) {
   w_lfl_ui_t *fui = args->element;
   int32_t key = *((int32_t *)args->data);
   switch (key) {
   case KEY_DOWN:
     if (fui->current->next != NULL) {
-      if (fui->current_idx < fui->rows_num - 1) {
+      if (fui->current_idx < fui->max_lines - 1) {
         fui->current = fui->current->next;
         fui->current_idx++;
       } else {
@@ -269,7 +270,7 @@ w_lfl_ui_t *w_lfl_init(WINDOW **win, w_t *w_parent) {
   fl_ui->w.callback = w_lfl_cb;
   fl_ui->w.sz.x = getmaxx(win_par) / 10 * 8;
   fl_ui->w.sz.y = getmaxy(win_par) / 10 * 8;
-  fl_ui->rows_num = 0; /* detects on the first draw */
+  fl_ui->max_lines = 0; /* detects on the first draw */
   fl_ui->cur_page = 1;
   return fl_ui;
 }
@@ -284,11 +285,47 @@ static void w_lfl_cb_refresh(void *data) {
   wnoutrefresh(fui->win_info);
 }
 
+static struct action_key action_keys[] = {
+    {.key = "Esc", .title = "Back", .code = '\33'},
+    {.key = "F9", .title = "Quit", .code = KEY_F(9)},
+};
+
+static int32_t process_user_input(w_app_t *app, w_cb_args_t *d_args) {
+  int32_t c;
+  w_lfl_ui_t *fui = (w_lfl_ui_t *)app->query_args->main_ui->ui;
+  c = wgetch(app->win);
+  switch (c) {
+  case KEY_F(9):
+    w_app_destroy(app, 0);
+    return OK;
+  case 'D':
+  case 'd':
+  case '\33': /* ESC key */
+    if (!app->modal.is_initiated) {
+      main_window_set(app, mw_fl_server);
+      main_window_draw(app);
+      server_send_string(app->query_args, "file list %u %u\n", fui->max_lines,
+                         1);
+      d_args->element = app->main_ui.ui;
+      break;
+    }
+  default:
+    d_args->data = (void *)&c;
+    app->active_callback(d_args);
+    break;
+  }
+  return OK;
+}
+
 w_lfl_ui_t *w_lfl_init_win(w_app_t *app) {
   w_lfl_ui_t *fui = malloc(sizeof(w_lfl_ui_t));
   app->main_ui.ui = fui;
   app->main_ui.type = mw_fl_local;
   app->main_ui.cb_refresh = w_lfl_cb_refresh;
+  app->main_ui.b_keys = action_keys;
+  app->main_ui.b_keys_len = 2;
+  app->main_ui.cb_b_press = (w_cb_press_t)process_user_input;
+  app->active_callback = w_lfl_cb;
   w_init(&(fui->w), NULL, &(app->win), "");
   fui->current_idx = 0;
   fui->win_info = NULL;
@@ -299,7 +336,7 @@ w_lfl_ui_t *w_lfl_init_win(w_app_t *app) {
   fui->w.callback = w_lfl_cb;
   fui->w.sz.x = getmaxx(app->win);
   fui->w.sz.y = getmaxy(app->win);
-  fui->rows_num = 0; /* detects on the first draw */
+  fui->max_lines = 0; /* detects on the first draw */
   fui->cur_page = 1;
   fui->w.parent_win = &(app->win);
   /* * INIT UI * */
@@ -326,9 +363,9 @@ void w_lfl_draw(w_lfl_ui_t *fui) {
   getmaxyx(win, sz_y, sz_x);
   int32_t sz_y_f = sz_y - 2; // actual size (without box)
   int32_t sz_x_f = sz_x - 2; // actual size (without box)
-  fui->rows_num = sz_y_f;
-  fui->pages_num = fui->files_num / fui->rows_num +
-                   (fui->files_num % fui->rows_num > 0 ? 1 : 0);
+  fui->max_lines = sz_y_f;
+  fui->pages_num = fui->files_num / fui->max_lines +
+                   (fui->files_num % fui->max_lines > 0 ? 1 : 0);
   p_y = 1;
   p_x = 1;
   w_lfl_item_t *el = fui->page_start;
diff --git a/src/widget/fs_file_list.h b/src/widget/fs_file_list.h
index cd97109..88a5055 100644
--- a/src/widget/fs_file_list.h
+++ b/src/widget/fs_file_list.h
@@ -24,7 +24,7 @@ typedef struct {
     w_lfl_item_t *start;
     w_lfl_item_t *page_start;
     int32_t current_idx;
-    int32_t rows_num;
+    int32_t max_lines;
     int32_t cur_page;
     int32_t pages_num;
     size_t files_num;
@@ -35,7 +35,6 @@ typedef struct {
 
 void        w_lfl_draw(w_lfl_ui_t *fl_ui);
 void        w_lfl_destroy(w_lfl_ui_t *fl_ui);
-void        w_lfl_cb(w_cb_args_t *args);
 void        w_lfl_reset(w_lfl_ui_t *fl_ui);
 w_lfl_ui_t *w_lfl_init(WINDOW **win, w_t *w_parent);
 w_lfl_ui_t *w_lfl_init_win(w_app_t *app);
diff --git a/src/widget_core/widget_core.h b/src/widget_core/widget_core.h
index 77ee704..69d59f2 100644
--- a/src/widget_core/widget_core.h
+++ b/src/widget_core/widget_core.h
@@ -73,6 +73,7 @@ typedef struct {
 } w_cb_args_t;
 
 typedef void (*w_cb_t)(w_cb_args_t *args);
+typedef int32_t (*w_cb_press_t)(void *app, void *data);
 
 typedef struct w_t {
   int64_t id;