| 1 | ! Tab Widget Module for Sniffly |
| 2 | ! Manages visual tab bar UI with tab buttons |
| 3 | module tab_widget |
| 4 | use, intrinsic :: iso_c_binding |
| 5 | use gtk, only: gtk_box_new, gtk_box_append, gtk_box_remove, & |
| 6 | GTK_ORIENTATION_HORIZONTAL, gtk_button_new, & |
| 7 | gtk_button_new_with_label, gtk_button_set_label, & |
| 8 | gtk_widget_set_size_request, g_signal_connect, & |
| 9 | gtk_widget_add_css_class, gtk_widget_remove_css_class, & |
| 10 | gtk_label_new, gtk_box_set_spacing, gtk_widget_set_hexpand, & |
| 11 | gtk_widget_set_halign, GTK_ALIGN_END, gtk_widget_get_first_child, & |
| 12 | gtk_widget_get_next_sibling |
| 13 | use tab_manager, only: tab_state, get_tab, num_tabs, active_tab_index, & |
| 14 | MAX_TABS, switch_to_tab, create_tab, close_tab |
| 15 | implicit none |
| 16 | private |
| 17 | |
| 18 | public :: create_tab_bar, refresh_tab_bar, get_tab_bar_widget, update_tab_visual_states, & |
| 19 | register_tab_switch_callback |
| 20 | |
| 21 | ! Tab bar container |
| 22 | type(c_ptr), save :: tab_bar_container = c_null_ptr |
| 23 | |
| 24 | ! Track button pointers to determine which tab was clicked |
| 25 | type(c_ptr), dimension(MAX_TABS), save :: tab_buttons = c_null_ptr |
| 26 | type(c_ptr), dimension(MAX_TABS), save :: close_buttons = c_null_ptr |
| 27 | |
| 28 | ! Tab click callback interface |
| 29 | abstract interface |
| 30 | subroutine tab_click_callback(tab_index) |
| 31 | integer, intent(in) :: tab_index |
| 32 | end subroutine tab_click_callback |
| 33 | end interface |
| 34 | |
| 35 | ! Close tab callback interface |
| 36 | abstract interface |
| 37 | subroutine close_tab_callback(tab_index) |
| 38 | integer, intent(in) :: tab_index |
| 39 | end subroutine close_tab_callback |
| 40 | end interface |
| 41 | |
| 42 | ! New tab callback interface |
| 43 | abstract interface |
| 44 | subroutine new_tab_callback() |
| 45 | end subroutine new_tab_callback |
| 46 | end interface |
| 47 | |
| 48 | ! Tab switch callback interface (for UI updates) |
| 49 | abstract interface |
| 50 | subroutine tab_switch_callback() |
| 51 | end subroutine tab_switch_callback |
| 52 | end interface |
| 53 | |
| 54 | ! Registered callbacks |
| 55 | procedure(tab_click_callback), pointer, save :: tab_click_cb => null() |
| 56 | procedure(close_tab_callback), pointer, save :: close_tab_cb => null() |
| 57 | procedure(new_tab_callback), pointer, save :: new_tab_cb => null() |
| 58 | procedure(tab_switch_callback), pointer, save :: tab_switch_cb => null() |
| 59 | |
| 60 | contains |
| 61 | |
| 62 | ! Create the tab bar (horizontal box with tab buttons) |
| 63 | function create_tab_bar() result(tab_bar) |
| 64 | type(c_ptr) :: tab_bar |
| 65 | |
| 66 | ! Create horizontal box for tabs (aligned to right) |
| 67 | tab_bar = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 5_c_int) |
| 68 | call gtk_widget_set_halign(tab_bar, GTK_ALIGN_END) |
| 69 | call gtk_box_set_spacing(tab_bar, 5_c_int) |
| 70 | |
| 71 | ! Store reference |
| 72 | tab_bar_container = tab_bar |
| 73 | |
| 74 | print *, "Tab bar container created" |
| 75 | end function create_tab_bar |
| 76 | |
| 77 | ! Refresh tab bar (rebuild all tab buttons) |
| 78 | subroutine refresh_tab_bar() |
| 79 | type(c_ptr) :: plus_btn, tab_btn, close_btn, tab_container, child, next_child |
| 80 | type(tab_state), pointer :: tab |
| 81 | integer :: i |
| 82 | character(len=256) :: label_text |
| 83 | |
| 84 | if (.not. c_associated(tab_bar_container)) then |
| 85 | print *, "ERROR: Tab bar not initialized" |
| 86 | return |
| 87 | end if |
| 88 | |
| 89 | print *, "Refreshing tab bar with ", num_tabs, " tabs" |
| 90 | |
| 91 | ! Clear all existing children from tab bar |
| 92 | child = gtk_widget_get_first_child(tab_bar_container) |
| 93 | do while (c_associated(child)) |
| 94 | ! Get next sibling BEFORE removing current child |
| 95 | next_child = gtk_widget_get_next_sibling(child) |
| 96 | call gtk_box_remove(tab_bar_container, child) |
| 97 | child = next_child |
| 98 | end do |
| 99 | |
| 100 | ! Clear button pointer arrays |
| 101 | tab_buttons(:) = c_null_ptr |
| 102 | close_buttons(:) = c_null_ptr |
| 103 | |
| 104 | print *, "Cleared old tab bar widgets" |
| 105 | |
| 106 | ! Create plus button first (leftmost) |
| 107 | plus_btn = gtk_button_new_with_label("+"//c_null_char) |
| 108 | call gtk_widget_set_size_request(plus_btn, 30_c_int, 28_c_int) |
| 109 | call g_signal_connect(plus_btn, "clicked"//c_null_char, & |
| 110 | c_funloc(on_plus_clicked), c_null_ptr) |
| 111 | call gtk_box_append(tab_bar_container, plus_btn) |
| 112 | |
| 113 | ! Create tab buttons (one for each tab) |
| 114 | do i = 1, num_tabs |
| 115 | tab => get_tab(i) |
| 116 | if (.not. associated(tab)) cycle |
| 117 | |
| 118 | ! Create horizontal container for this tab (label + close button) |
| 119 | tab_container = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 2_c_int) |
| 120 | |
| 121 | ! Format label - show just "Empty" for empty tabs, ".../basename" for normal tabs |
| 122 | if (trim(tab%label) == "Empty") then |
| 123 | label_text = "Empty" |
| 124 | else |
| 125 | label_text = ".../" // trim(tab%label) |
| 126 | end if |
| 127 | |
| 128 | ! Create tab label button |
| 129 | tab_btn = gtk_button_new_with_label(trim(label_text)//c_null_char) |
| 130 | call gtk_widget_set_size_request(tab_btn, 110_c_int, 28_c_int) |
| 131 | |
| 132 | ! Store button pointer so we can identify which tab was clicked |
| 133 | tab_buttons(i) = tab_btn |
| 134 | |
| 135 | ! Add yellow border if active tab |
| 136 | if (i == active_tab_index) then |
| 137 | call gtk_widget_add_css_class(tab_btn, "active-tab"//c_null_char) |
| 138 | end if |
| 139 | |
| 140 | ! Connect click handler for tab selection |
| 141 | call g_signal_connect(tab_btn, "clicked"//c_null_char, & |
| 142 | c_funloc(on_tab_clicked), c_null_ptr) |
| 143 | |
| 144 | call gtk_box_append(tab_container, tab_btn) |
| 145 | |
| 146 | ! Create close button (small × button) |
| 147 | close_btn = gtk_button_new_with_label("×"//c_null_char) |
| 148 | call gtk_widget_set_size_request(close_btn, 24_c_int, 28_c_int) |
| 149 | |
| 150 | ! Store close button pointer |
| 151 | close_buttons(i) = close_btn |
| 152 | |
| 153 | ! Connect click handler for closing tab |
| 154 | call g_signal_connect(close_btn, "clicked"//c_null_char, & |
| 155 | c_funloc(on_close_clicked), c_null_ptr) |
| 156 | |
| 157 | call gtk_box_append(tab_container, close_btn) |
| 158 | |
| 159 | ! Add the tab container to the tab bar |
| 160 | call gtk_box_append(tab_bar_container, tab_container) |
| 161 | print *, "Added tab button ", i, ": ", trim(label_text) |
| 162 | end do |
| 163 | |
| 164 | print *, "Tab bar refreshed" |
| 165 | end subroutine refresh_tab_bar |
| 166 | |
| 167 | ! Get the tab bar widget pointer |
| 168 | function get_tab_bar_widget() result(widget) |
| 169 | type(c_ptr) :: widget |
| 170 | widget = tab_bar_container |
| 171 | end function get_tab_bar_widget |
| 172 | |
| 173 | ! Update visual states of tab buttons (yellow border for active tab) |
| 174 | subroutine update_tab_visual_states() |
| 175 | integer :: i |
| 176 | |
| 177 | ! Update CSS classes for all tab buttons |
| 178 | do i = 1, num_tabs |
| 179 | if (.not. c_associated(tab_buttons(i))) cycle |
| 180 | |
| 181 | ! Remove or add active-tab class based on whether this is the active tab |
| 182 | if (i == active_tab_index) then |
| 183 | call gtk_widget_add_css_class(tab_buttons(i), "active-tab"//c_null_char) |
| 184 | else |
| 185 | call gtk_widget_remove_css_class(tab_buttons(i), "active-tab"//c_null_char) |
| 186 | end if |
| 187 | end do |
| 188 | |
| 189 | print *, "Updated tab visual states - active tab: ", active_tab_index |
| 190 | end subroutine update_tab_visual_states |
| 191 | |
| 192 | ! Callback when plus button is clicked |
| 193 | subroutine on_plus_clicked(button, user_data) bind(c) |
| 194 | use iso_fortran_env, only: output_unit |
| 195 | type(c_ptr), value :: button, user_data |
| 196 | integer :: new_tab_index |
| 197 | type(tab_state), pointer :: new_tab, current_tab |
| 198 | character(len=512) :: new_tab_path |
| 199 | |
| 200 | print *, "Plus button clicked - creating new tab" |
| 201 | |
| 202 | ! New tabs start completely empty - no path to avoid accidental scans |
| 203 | new_tab_path = "" |
| 204 | |
| 205 | ! Create a new empty tab |
| 206 | new_tab_index = create_tab(new_tab_path) |
| 207 | |
| 208 | if (new_tab_index < 0) then |
| 209 | print *, "ERROR: Failed to create new tab (max tabs reached?)" |
| 210 | return |
| 211 | end if |
| 212 | |
| 213 | print *, "Created new tab ", new_tab_index |
| 214 | |
| 215 | ! Switch to the new tab |
| 216 | call switch_to_tab(new_tab_index) |
| 217 | |
| 218 | ! Rebuild tab bar to show the new tab |
| 219 | call refresh_tab_bar() |
| 220 | |
| 221 | ! Update visual states (yellow border on new active tab) |
| 222 | call update_tab_visual_states() |
| 223 | |
| 224 | ! Update UI for the new tab (but don't auto-scan empty tabs) |
| 225 | if (associated(tab_switch_cb)) then |
| 226 | call tab_switch_cb() |
| 227 | end if |
| 228 | |
| 229 | print *, "Tab bar refreshed and switched to new tab ", new_tab_index |
| 230 | end subroutine on_plus_clicked |
| 231 | |
| 232 | ! Callback when a tab button is clicked |
| 233 | subroutine on_tab_clicked(button, user_data) bind(c) |
| 234 | type(c_ptr), value :: button, user_data |
| 235 | integer :: i, clicked_tab_index |
| 236 | |
| 237 | ! Find which tab was clicked by comparing button pointers |
| 238 | clicked_tab_index = -1 |
| 239 | do i = 1, num_tabs |
| 240 | if (c_associated(tab_buttons(i), button)) then |
| 241 | clicked_tab_index = i |
| 242 | exit |
| 243 | end if |
| 244 | end do |
| 245 | |
| 246 | if (clicked_tab_index == -1) then |
| 247 | print *, "WARNING: Could not determine which tab was clicked" |
| 248 | return |
| 249 | end if |
| 250 | |
| 251 | print *, "Tab ", clicked_tab_index, " clicked" |
| 252 | |
| 253 | ! If already on this tab, nothing to do |
| 254 | if (clicked_tab_index == active_tab_index) then |
| 255 | print *, "Already on tab ", clicked_tab_index |
| 256 | return |
| 257 | end if |
| 258 | |
| 259 | ! Switch to the clicked tab |
| 260 | call switch_to_tab(clicked_tab_index) |
| 261 | |
| 262 | ! Update tab visual states (yellow border) |
| 263 | call update_tab_visual_states() |
| 264 | |
| 265 | ! Call registered UI update callback (if registered) |
| 266 | if (associated(tab_switch_cb)) then |
| 267 | call tab_switch_cb() |
| 268 | end if |
| 269 | |
| 270 | print *, "Switched to tab ", clicked_tab_index |
| 271 | end subroutine on_tab_clicked |
| 272 | |
| 273 | ! Callback when a close button is clicked |
| 274 | subroutine on_close_clicked(button, user_data) bind(c) |
| 275 | type(c_ptr), value :: button, user_data |
| 276 | integer :: i, clicked_tab_index |
| 277 | |
| 278 | ! Find which close button was clicked |
| 279 | clicked_tab_index = -1 |
| 280 | do i = 1, num_tabs |
| 281 | if (c_associated(close_buttons(i), button)) then |
| 282 | clicked_tab_index = i |
| 283 | exit |
| 284 | end if |
| 285 | end do |
| 286 | |
| 287 | if (clicked_tab_index == -1) then |
| 288 | print *, "WARNING: Could not determine which close button was clicked" |
| 289 | return |
| 290 | end if |
| 291 | |
| 292 | print *, "Close button clicked for tab ", clicked_tab_index |
| 293 | |
| 294 | ! Prevent closing last tab |
| 295 | if (num_tabs <= 1) then |
| 296 | print *, "ERROR: Cannot close last tab" |
| 297 | return |
| 298 | end if |
| 299 | |
| 300 | ! Close the tab |
| 301 | call close_tab(clicked_tab_index) |
| 302 | |
| 303 | ! Rebuild tab bar |
| 304 | call refresh_tab_bar() |
| 305 | |
| 306 | ! Update visual states |
| 307 | call update_tab_visual_states() |
| 308 | |
| 309 | ! Update UI for the new active tab |
| 310 | if (associated(tab_switch_cb)) then |
| 311 | call tab_switch_cb() |
| 312 | end if |
| 313 | |
| 314 | print *, "Tab ", clicked_tab_index, " closed - now ", num_tabs, " tabs remaining" |
| 315 | end subroutine on_close_clicked |
| 316 | |
| 317 | ! Register tab click callback |
| 318 | subroutine register_tab_click_callback(callback) |
| 319 | procedure(tab_click_callback) :: callback |
| 320 | tab_click_cb => callback |
| 321 | end subroutine register_tab_click_callback |
| 322 | |
| 323 | ! Register close tab callback |
| 324 | subroutine register_close_tab_callback(callback) |
| 325 | procedure(close_tab_callback) :: callback |
| 326 | close_tab_cb => callback |
| 327 | end subroutine register_close_tab_callback |
| 328 | |
| 329 | ! Register new tab callback |
| 330 | subroutine register_new_tab_callback(callback) |
| 331 | procedure(new_tab_callback) :: callback |
| 332 | new_tab_cb => callback |
| 333 | end subroutine register_new_tab_callback |
| 334 | |
| 335 | ! Register tab switch callback (for UI updates) |
| 336 | subroutine register_tab_switch_callback(callback) |
| 337 | procedure(tab_switch_callback) :: callback |
| 338 | tab_switch_cb => callback |
| 339 | print *, "Tab switch callback registered" |
| 340 | end subroutine register_tab_switch_callback |
| 341 | |
| 342 | end module tab_widget |
| 343 |