| 1 | ! Custom Cairo Breadcrumb Widget for Sniffly |
| 2 | ! Renders path as clickable, color-coded text segments with hover effects |
| 3 | module breadcrumb_widget |
| 4 | use, intrinsic :: iso_c_binding |
| 5 | use gtk, only: gtk_drawing_area_new, gtk_drawing_area_set_draw_func, & |
| 6 | gtk_widget_set_size_request, gtk_event_controller_motion_new, & |
| 7 | gtk_widget_add_controller, g_signal_connect, & |
| 8 | gtk_gesture_click_new, gtk_widget_queue_draw |
| 9 | use cairo, only: cairo_set_source_rgb, cairo_set_source_rgba, cairo_move_to |
| 10 | use pango, only: pango_cairo_create_layout, pango_layout_set_text, & |
| 11 | pango_font_description_from_string, pango_layout_set_font_description, & |
| 12 | pango_cairo_show_layout, pango_layout_get_pixel_size, & |
| 13 | pango_font_description_free |
| 14 | implicit none |
| 15 | private |
| 16 | |
| 17 | public :: create_breadcrumb_widget, update_breadcrumb_cache, & |
| 18 | set_navigation_callback, get_breadcrumb_widget_ptr, & |
| 19 | get_previous_breadcrumb_path, clear_previous_breadcrumb_path |
| 20 | |
| 21 | ! Callback interface for navigation events |
| 22 | abstract interface |
| 23 | subroutine navigation_callback() |
| 24 | end subroutine navigation_callback |
| 25 | end interface |
| 26 | |
| 27 | ! Segment bounds for hit-testing |
| 28 | type :: segment_bounds |
| 29 | integer(c_int) :: x, y, width, height |
| 30 | end type segment_bounds |
| 31 | |
| 32 | ! Maximum number of path segments |
| 33 | integer, parameter :: MAX_SEGMENTS = 50 |
| 34 | |
| 35 | ! Path segment cache (updated on main thread only via update_breadcrumb_cache) |
| 36 | character(len=512), dimension(MAX_SEGMENTS), save :: cached_segment_paths = "" |
| 37 | character(len=256), dimension(MAX_SEGMENTS), save :: cached_segment_names = "" |
| 38 | integer, save :: cached_segment_count = 0 |
| 39 | |
| 40 | ! Forward lookahead segments (greyed out continuation when navigating back) |
| 41 | character(len=512), dimension(MAX_SEGMENTS), save :: cached_forward_segment_paths = "" |
| 42 | character(len=256), dimension(MAX_SEGMENTS), save :: cached_forward_segment_names = "" |
| 43 | integer, save :: cached_forward_segment_count = 0 |
| 44 | |
| 45 | ! Hover state |
| 46 | integer, save :: hovered_segment = 0 ! 0 = none, 1+ = segment index |
| 47 | integer, save :: last_hovered_segment = -1 |
| 48 | |
| 49 | ! Click bounds for each segment (populated during draw) |
| 50 | type(segment_bounds), dimension(MAX_SEGMENTS), save :: segment_rects |
| 51 | |
| 52 | ! Widget pointer |
| 53 | type(c_ptr), save :: breadcrumb_widget_ptr = c_null_ptr |
| 54 | |
| 55 | ! Navigation callback (called when user clicks a segment) |
| 56 | procedure(navigation_callback), pointer, save :: nav_callback => null() |
| 57 | |
| 58 | ! Previous path before breadcrumb navigation (for lookahead detection) |
| 59 | character(len=512), save :: previous_breadcrumb_path = "" |
| 60 | |
| 61 | contains |
| 62 | |
| 63 | ! Create and initialize the breadcrumb drawing area widget |
| 64 | function create_breadcrumb_widget() result(widget) |
| 65 | type(c_ptr) :: widget, motion_controller, click_controller |
| 66 | |
| 67 | ! Create drawing area |
| 68 | widget = gtk_drawing_area_new() |
| 69 | breadcrumb_widget_ptr = widget |
| 70 | |
| 71 | if (.not. c_associated(widget)) then |
| 72 | print *, "ERROR: Failed to create breadcrumb drawing area" |
| 73 | return |
| 74 | end if |
| 75 | |
| 76 | ! Set minimum height (width will expand to fill) |
| 77 | call gtk_widget_set_size_request(widget, -1_c_int, 30_c_int) |
| 78 | |
| 79 | ! Set draw function (called when widget needs to redraw) |
| 80 | call gtk_drawing_area_set_draw_func(widget, & |
| 81 | c_funloc(on_draw_breadcrumb), & |
| 82 | c_null_ptr, & |
| 83 | c_null_funptr) |
| 84 | |
| 85 | ! Add motion event controller for hover |
| 86 | motion_controller = gtk_event_controller_motion_new() |
| 87 | call g_signal_connect(motion_controller, "motion"//c_null_char, & |
| 88 | c_funloc(on_breadcrumb_motion), c_null_ptr) |
| 89 | call gtk_widget_add_controller(widget, motion_controller) |
| 90 | |
| 91 | ! Add click gesture controller for navigation |
| 92 | click_controller = gtk_gesture_click_new() |
| 93 | call g_signal_connect(click_controller, "pressed"//c_null_char, & |
| 94 | c_funloc(on_breadcrumb_click), c_null_ptr) |
| 95 | call gtk_widget_add_controller(widget, click_controller) |
| 96 | |
| 97 | print *, "Breadcrumb widget created successfully" |
| 98 | end function create_breadcrumb_widget |
| 99 | |
| 100 | ! Get widget pointer (for external access) |
| 101 | function get_breadcrumb_widget_ptr() result(ptr) |
| 102 | type(c_ptr) :: ptr |
| 103 | ptr = breadcrumb_widget_ptr |
| 104 | end function get_breadcrumb_widget_ptr |
| 105 | |
| 106 | ! Register a callback to be called when navigation occurs |
| 107 | subroutine set_navigation_callback(callback) |
| 108 | procedure(navigation_callback) :: callback |
| 109 | nav_callback => callback |
| 110 | print *, "Breadcrumb navigation callback registered" |
| 111 | end subroutine set_navigation_callback |
| 112 | |
| 113 | ! Update cached path segments (called from main thread on navigation events) |
| 114 | ! This is the ONLY function that modifies cached_segment_* |
| 115 | subroutine update_breadcrumb_cache(full_path, forward_path) |
| 116 | character(len=*), intent(in) :: full_path |
| 117 | character(len=*), intent(in), optional :: forward_path |
| 118 | character(len=512) :: working_path, fwd_continuation |
| 119 | integer :: slash_pos, start_pos, current_len |
| 120 | |
| 121 | print *, "Updating breadcrumb cache for: ", trim(full_path) |
| 122 | |
| 123 | ! Reset cache |
| 124 | cached_segment_count = 0 |
| 125 | cached_segment_paths = "" |
| 126 | cached_segment_names = "" |
| 127 | cached_forward_segment_count = 0 |
| 128 | cached_forward_segment_paths = "" |
| 129 | cached_forward_segment_names = "" |
| 130 | |
| 131 | ! If path is empty, trigger redraw to clear breadcrumb and return |
| 132 | if (len_trim(full_path) == 0) then |
| 133 | call queue_redraw() |
| 134 | return |
| 135 | end if |
| 136 | |
| 137 | ! Use full path (no ~ abbreviation for better navigation) |
| 138 | working_path = trim(full_path) |
| 139 | |
| 140 | ! Handle root path |
| 141 | if (trim(working_path) == "/") then |
| 142 | cached_segment_count = 1 |
| 143 | cached_segment_paths(1) = "/" |
| 144 | cached_segment_names(1) = "/" |
| 145 | print *, " Segment 1: / -> /" |
| 146 | call queue_redraw() |
| 147 | return |
| 148 | end if |
| 149 | |
| 150 | ! Parse path into segments |
| 151 | start_pos = 1 |
| 152 | |
| 153 | ! Add root segment |
| 154 | if (working_path(1:1) == "/") then |
| 155 | start_pos = 2 |
| 156 | cached_segment_count = 1 |
| 157 | cached_segment_paths(1) = "/" |
| 158 | cached_segment_names(1) = "/" |
| 159 | print *, " Segment 1: / -> /" |
| 160 | end if |
| 161 | |
| 162 | ! Parse remaining segments |
| 163 | do while (start_pos <= len_trim(working_path) .and. cached_segment_count < MAX_SEGMENTS) |
| 164 | ! Skip any leading slashes |
| 165 | do while (start_pos <= len_trim(working_path) .and. working_path(start_pos:start_pos) == "/") |
| 166 | start_pos = start_pos + 1 |
| 167 | end do |
| 168 | |
| 169 | ! Check if we've reached the end |
| 170 | if (start_pos > len_trim(working_path)) exit |
| 171 | |
| 172 | ! Find next slash |
| 173 | slash_pos = index(working_path(start_pos:), "/") |
| 174 | |
| 175 | if (slash_pos == 0) then |
| 176 | ! Last segment (no trailing slash) |
| 177 | cached_segment_count = cached_segment_count + 1 |
| 178 | cached_segment_paths(cached_segment_count) = trim(working_path) |
| 179 | cached_segment_names(cached_segment_count) = trim(working_path(start_pos:)) |
| 180 | print *, " Segment ", cached_segment_count, ": ", & |
| 181 | trim(cached_segment_paths(cached_segment_count)), " -> ", & |
| 182 | trim(cached_segment_names(cached_segment_count)) |
| 183 | exit |
| 184 | else |
| 185 | ! Intermediate segment |
| 186 | cached_segment_count = cached_segment_count + 1 |
| 187 | cached_segment_paths(cached_segment_count) = trim(working_path(1:start_pos+slash_pos-2)) |
| 188 | cached_segment_names(cached_segment_count) = trim(working_path(start_pos:start_pos+slash_pos-2)) |
| 189 | print *, " Segment ", cached_segment_count, ": ", & |
| 190 | trim(cached_segment_paths(cached_segment_count)), " -> ", & |
| 191 | trim(cached_segment_names(cached_segment_count)) |
| 192 | start_pos = start_pos + slash_pos |
| 193 | end if |
| 194 | end do |
| 195 | |
| 196 | print *, "Breadcrumb cache updated: ", cached_segment_count, " segments" |
| 197 | |
| 198 | ! Parse forward lookahead continuation (if provided) |
| 199 | if (present(forward_path) .and. len_trim(forward_path) > 0) then |
| 200 | current_len = len_trim(full_path) |
| 201 | |
| 202 | ! Check if forward_path starts with current path |
| 203 | if (len_trim(forward_path) > current_len) then |
| 204 | if (forward_path(1:current_len) == full_path(1:current_len)) then |
| 205 | ! Extract continuation (everything after current path) |
| 206 | if (forward_path(current_len+1:current_len+1) == "/") then |
| 207 | fwd_continuation = trim(forward_path(current_len+1:)) |
| 208 | else |
| 209 | fwd_continuation = trim(forward_path(current_len:)) |
| 210 | end if |
| 211 | |
| 212 | print *, "Forward continuation: ", trim(fwd_continuation) |
| 213 | |
| 214 | ! Parse continuation segments (similar to main path parsing) |
| 215 | start_pos = 1 |
| 216 | |
| 217 | ! Skip leading slashes |
| 218 | do while (start_pos <= len_trim(fwd_continuation) .and. & |
| 219 | fwd_continuation(start_pos:start_pos) == "/") |
| 220 | start_pos = start_pos + 1 |
| 221 | end do |
| 222 | |
| 223 | ! Parse forward segments |
| 224 | do while (start_pos <= len_trim(fwd_continuation) .and. & |
| 225 | cached_forward_segment_count < MAX_SEGMENTS) |
| 226 | ! Skip any leading slashes |
| 227 | do while (start_pos <= len_trim(fwd_continuation) .and. & |
| 228 | fwd_continuation(start_pos:start_pos) == "/") |
| 229 | start_pos = start_pos + 1 |
| 230 | end do |
| 231 | |
| 232 | if (start_pos > len_trim(fwd_continuation)) exit |
| 233 | |
| 234 | ! Find next slash |
| 235 | slash_pos = index(fwd_continuation(start_pos:), "/") |
| 236 | |
| 237 | if (slash_pos == 0) then |
| 238 | ! Last segment |
| 239 | cached_forward_segment_count = cached_forward_segment_count + 1 |
| 240 | cached_forward_segment_paths(cached_forward_segment_count) = trim(forward_path) |
| 241 | cached_forward_segment_names(cached_forward_segment_count) = & |
| 242 | trim(fwd_continuation(start_pos:)) |
| 243 | print *, " Forward segment ", cached_forward_segment_count, ": ", & |
| 244 | trim(cached_forward_segment_names(cached_forward_segment_count)) |
| 245 | exit |
| 246 | else |
| 247 | ! Intermediate segment |
| 248 | cached_forward_segment_count = cached_forward_segment_count + 1 |
| 249 | ! Build full path up to this segment |
| 250 | cached_forward_segment_paths(cached_forward_segment_count) = & |
| 251 | trim(full_path) // trim(fwd_continuation(1:start_pos+slash_pos-2)) |
| 252 | cached_forward_segment_names(cached_forward_segment_count) = & |
| 253 | trim(fwd_continuation(start_pos:start_pos+slash_pos-2)) |
| 254 | print *, " Forward segment ", cached_forward_segment_count, ": ", & |
| 255 | trim(cached_forward_segment_names(cached_forward_segment_count)) |
| 256 | start_pos = start_pos + slash_pos |
| 257 | end if |
| 258 | end do |
| 259 | |
| 260 | print *, "Forward lookahead: ", cached_forward_segment_count, " segments" |
| 261 | end if |
| 262 | end if |
| 263 | end if |
| 264 | |
| 265 | ! Trigger redraw |
| 266 | call queue_redraw() |
| 267 | end subroutine update_breadcrumb_cache |
| 268 | |
| 269 | ! Helper: Queue redraw of widget |
| 270 | subroutine queue_redraw() |
| 271 | if (c_associated(breadcrumb_widget_ptr)) then |
| 272 | call gtk_widget_queue_draw(breadcrumb_widget_ptr) |
| 273 | end if |
| 274 | end subroutine queue_redraw |
| 275 | |
| 276 | ! Draw callback - render the breadcrumb |
| 277 | subroutine on_draw_breadcrumb(area, cr, width, height, user_data) bind(c) |
| 278 | type(c_ptr), value :: area, cr, user_data |
| 279 | integer(c_int), value :: width, height |
| 280 | type(c_ptr) :: layout, font_desc |
| 281 | integer(c_int), target :: text_width, text_height |
| 282 | integer(c_int) :: x_offset |
| 283 | integer :: i |
| 284 | character(len=:), allocatable :: separator |
| 285 | |
| 286 | ! Early return if no segments |
| 287 | if (cached_segment_count == 0) return |
| 288 | |
| 289 | ! Create Pango layout for text rendering |
| 290 | layout = pango_cairo_create_layout(cr) |
| 291 | if (.not. c_associated(layout)) then |
| 292 | print *, "ERROR: Failed to create Pango layout" |
| 293 | return |
| 294 | end if |
| 295 | |
| 296 | separator = " / " |
| 297 | x_offset = 5 ! Left padding |
| 298 | |
| 299 | ! Draw each segment |
| 300 | do i = 1, cached_segment_count |
| 301 | ! Set font and color based on segment state |
| 302 | |
| 303 | ! Root segment (first): green |
| 304 | if (i == 1) then |
| 305 | call cairo_set_source_rgb(cr, 0.0_c_double, 0.6_c_double, 0.0_c_double) |
| 306 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 307 | |
| 308 | ! Active segment (last): bold red |
| 309 | else if (i == cached_segment_count) then |
| 310 | call cairo_set_source_rgb(cr, 0.8_c_double, 0.0_c_double, 0.0_c_double) |
| 311 | font_desc = pango_font_description_from_string("Sans Bold 11"//c_null_char) |
| 312 | |
| 313 | ! Hovered segment: darker gray |
| 314 | else if (i == hovered_segment) then |
| 315 | call cairo_set_source_rgb(cr, 0.3_c_double, 0.3_c_double, 0.3_c_double) |
| 316 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 317 | |
| 318 | ! Inactive segment: gray |
| 319 | else |
| 320 | call cairo_set_source_rgb(cr, 0.5_c_double, 0.5_c_double, 0.5_c_double) |
| 321 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 322 | end if |
| 323 | |
| 324 | ! Set font |
| 325 | call pango_layout_set_font_description(layout, font_desc) |
| 326 | call pango_font_description_free(font_desc) |
| 327 | |
| 328 | ! Set text |
| 329 | call pango_layout_set_text(layout, trim(cached_segment_names(i))//c_null_char, & |
| 330 | int(len_trim(cached_segment_names(i)), c_int)) |
| 331 | |
| 332 | ! Get text size |
| 333 | call pango_layout_get_pixel_size(layout, c_loc(text_width), c_loc(text_height)) |
| 334 | |
| 335 | ! Store bounds for hit-testing |
| 336 | segment_rects(i)%x = x_offset |
| 337 | segment_rects(i)%y = 0 |
| 338 | segment_rects(i)%width = text_width |
| 339 | segment_rects(i)%height = height |
| 340 | |
| 341 | ! Position and draw text |
| 342 | call cairo_move_to(cr, real(x_offset, c_double), & |
| 343 | real((height - text_height) / 2, c_double)) ! Vertically center |
| 344 | call pango_cairo_show_layout(cr, layout) |
| 345 | |
| 346 | ! Update offset |
| 347 | x_offset = x_offset + text_width |
| 348 | |
| 349 | ! Draw separator (if not last segment) |
| 350 | if (i < cached_segment_count) then |
| 351 | ! Skip separator after root "/" since it already contains the slash |
| 352 | if (trim(cached_segment_names(i)) /= "/") then |
| 353 | ! Set separator color (black to distinguish from colored segment text) |
| 354 | call cairo_set_source_rgb(cr, 0.0_c_double, 0.0_c_double, 0.0_c_double) |
| 355 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 356 | call pango_layout_set_font_description(layout, font_desc) |
| 357 | call pango_font_description_free(font_desc) |
| 358 | |
| 359 | ! Don't trim separator to preserve both leading and trailing spaces |
| 360 | call pango_layout_set_text(layout, separator//c_null_char, & |
| 361 | int(len(separator), c_int)) |
| 362 | call pango_layout_get_pixel_size(layout, c_loc(text_width), c_loc(text_height)) |
| 363 | call cairo_move_to(cr, real(x_offset, c_double), & |
| 364 | real((height - text_height) / 2, c_double)) |
| 365 | call pango_cairo_show_layout(cr, layout) |
| 366 | |
| 367 | x_offset = x_offset + text_width |
| 368 | else |
| 369 | ! After root "/", just add a space (no slash separator since root already has it) |
| 370 | ! Set separator color (black) |
| 371 | call cairo_set_source_rgb(cr, 0.0_c_double, 0.0_c_double, 0.0_c_double) |
| 372 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 373 | call pango_layout_set_font_description(layout, font_desc) |
| 374 | call pango_font_description_free(font_desc) |
| 375 | |
| 376 | call pango_layout_set_text(layout, " "//c_null_char, 1_c_int) |
| 377 | call pango_layout_get_pixel_size(layout, c_loc(text_width), c_loc(text_height)) |
| 378 | call cairo_move_to(cr, real(x_offset, c_double), & |
| 379 | real((height - text_height) / 2, c_double)) |
| 380 | call pango_cairo_show_layout(cr, layout) |
| 381 | |
| 382 | x_offset = x_offset + text_width |
| 383 | end if |
| 384 | end if |
| 385 | end do |
| 386 | |
| 387 | ! Draw forward lookahead segments (greyed out) |
| 388 | do i = 1, cached_forward_segment_count |
| 389 | ! Draw separator before forward segment (black, but with transparency for lookahead) |
| 390 | call cairo_set_source_rgba(cr, 0.0_c_double, 0.0_c_double, 0.0_c_double, 0.5_c_double) |
| 391 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 392 | call pango_layout_set_font_description(layout, font_desc) |
| 393 | call pango_font_description_free(font_desc) |
| 394 | |
| 395 | ! Don't trim separator to preserve both leading and trailing spaces |
| 396 | call pango_layout_set_text(layout, separator//c_null_char, & |
| 397 | int(len(separator), c_int)) |
| 398 | call pango_layout_get_pixel_size(layout, c_loc(text_width), c_loc(text_height)) |
| 399 | call cairo_move_to(cr, real(x_offset, c_double), & |
| 400 | real((height - text_height) / 2, c_double)) |
| 401 | call pango_cairo_show_layout(cr, layout) |
| 402 | x_offset = x_offset + text_width |
| 403 | |
| 404 | ! Set color for forward segment based on hover state |
| 405 | if (cached_segment_count + i == hovered_segment) then |
| 406 | ! Hovered forward segment: same dark grey as regular segments (full opacity) |
| 407 | call cairo_set_source_rgb(cr, 0.3_c_double, 0.3_c_double, 0.3_c_double) |
| 408 | else |
| 409 | ! Normal forward segment: lighter grey with transparency |
| 410 | call cairo_set_source_rgba(cr, 0.5_c_double, 0.5_c_double, 0.5_c_double, 0.5_c_double) |
| 411 | end if |
| 412 | |
| 413 | font_desc = pango_font_description_from_string("Sans 11"//c_null_char) |
| 414 | call pango_layout_set_font_description(layout, font_desc) |
| 415 | call pango_font_description_free(font_desc) |
| 416 | |
| 417 | ! Draw forward segment name |
| 418 | call pango_layout_set_text(layout, trim(cached_forward_segment_names(i))//c_null_char, & |
| 419 | int(len_trim(cached_forward_segment_names(i)), c_int)) |
| 420 | call pango_layout_get_pixel_size(layout, c_loc(text_width), c_loc(text_height)) |
| 421 | |
| 422 | ! Store bounds for hit-testing (use offset indices: segment count + i) |
| 423 | segment_rects(cached_segment_count + i)%x = x_offset |
| 424 | segment_rects(cached_segment_count + i)%y = 0 |
| 425 | segment_rects(cached_segment_count + i)%width = text_width |
| 426 | segment_rects(cached_segment_count + i)%height = height |
| 427 | |
| 428 | ! Position and draw text |
| 429 | call cairo_move_to(cr, real(x_offset, c_double), & |
| 430 | real((height - text_height) / 2, c_double)) |
| 431 | call pango_cairo_show_layout(cr, layout) |
| 432 | |
| 433 | x_offset = x_offset + text_width |
| 434 | end do |
| 435 | |
| 436 | ! Clean up (Pango layout is freed by GTK automatically) |
| 437 | end subroutine on_draw_breadcrumb |
| 438 | |
| 439 | ! Motion callback - track hover state |
| 440 | subroutine on_breadcrumb_motion(controller, x, y, user_data) bind(c) |
| 441 | type(c_ptr), value :: controller, user_data |
| 442 | real(c_double), value :: x, y |
| 443 | integer :: new_hovered |
| 444 | |
| 445 | ! Find which segment is under the mouse |
| 446 | new_hovered = find_segment_at_position(x, y) |
| 447 | |
| 448 | ! Only redraw if hover state CHANGED (optimization) |
| 449 | if (new_hovered /= last_hovered_segment) then |
| 450 | last_hovered_segment = new_hovered |
| 451 | hovered_segment = new_hovered |
| 452 | call queue_redraw() |
| 453 | end if |
| 454 | end subroutine on_breadcrumb_motion |
| 455 | |
| 456 | ! Click callback - handle navigation |
| 457 | subroutine on_breadcrumb_click(gesture, n_press, x, y, user_data) bind(c) |
| 458 | use treemap_renderer, only: get_current_view_node, scan_directory |
| 459 | use progressive_scanner, only: is_scan_active |
| 460 | use types, only: file_node |
| 461 | type(c_ptr), value :: gesture, user_data |
| 462 | integer(c_int), value :: n_press |
| 463 | real(c_double), value :: x, y |
| 464 | integer :: clicked_segment, total_segments |
| 465 | type(file_node), pointer :: current_view |
| 466 | character(len=:), allocatable :: target_path |
| 467 | character(len=512) :: current_path |
| 468 | |
| 469 | ! Block navigation if scan is active (safety check) |
| 470 | if (is_scan_active()) then |
| 471 | print *, "Breadcrumb click blocked: Scan in progress" |
| 472 | return |
| 473 | end if |
| 474 | |
| 475 | ! Find which segment was clicked |
| 476 | clicked_segment = find_segment_at_position(x, y) |
| 477 | total_segments = cached_segment_count + cached_forward_segment_count |
| 478 | |
| 479 | if (clicked_segment > 0 .and. clicked_segment <= total_segments) then |
| 480 | ! Save current path before navigation (for lookahead detection) |
| 481 | current_view => get_current_view_node() |
| 482 | if (associated(current_view) .and. allocated(current_view%path)) then |
| 483 | current_path = trim(current_view%path) |
| 484 | previous_breadcrumb_path = current_path |
| 485 | print *, "Saved previous breadcrumb path: ", trim(previous_breadcrumb_path) |
| 486 | else |
| 487 | previous_breadcrumb_path = "" |
| 488 | end if |
| 489 | |
| 490 | ! Check if it's a regular segment or forward segment |
| 491 | if (clicked_segment <= cached_segment_count) then |
| 492 | ! Regular segment clicked |
| 493 | ! Don't navigate if clicking the active (last) segment |
| 494 | if (clicked_segment == cached_segment_count .and. cached_forward_segment_count == 0) then |
| 495 | print *, "Clicked active segment - no navigation" |
| 496 | previous_breadcrumb_path = "" ! Clear since no navigation |
| 497 | return |
| 498 | end if |
| 499 | |
| 500 | print *, "Breadcrumb clicked: segment ", clicked_segment, " (", & |
| 501 | trim(cached_segment_names(clicked_segment)), ")" |
| 502 | |
| 503 | ! Get the full path for this segment |
| 504 | target_path = trim(cached_segment_paths(clicked_segment)) |
| 505 | else |
| 506 | ! Forward segment clicked |
| 507 | print *, "Forward breadcrumb clicked: segment ", clicked_segment - cached_segment_count, " (", & |
| 508 | trim(cached_forward_segment_names(clicked_segment - cached_segment_count)), ")" |
| 509 | |
| 510 | ! Get the full path for this forward segment |
| 511 | target_path = trim(cached_forward_segment_paths(clicked_segment - cached_segment_count)) |
| 512 | end if |
| 513 | |
| 514 | print *, "Navigating to: ", target_path |
| 515 | print *, " (breadcrumb navigation - checking for lookahead)" |
| 516 | |
| 517 | ! Scan the target directory |
| 518 | ! This will update the current view and trigger callbacks |
| 519 | call scan_directory(target_path) |
| 520 | |
| 521 | ! Call navigation callback to update UI |
| 522 | if (associated(nav_callback)) then |
| 523 | call nav_callback() |
| 524 | end if |
| 525 | |
| 526 | ! Redraw |
| 527 | call queue_redraw() |
| 528 | end if |
| 529 | end subroutine on_breadcrumb_click |
| 530 | |
| 531 | ! Get the previous breadcrumb path (before navigation) |
| 532 | function get_previous_breadcrumb_path() result(path) |
| 533 | character(len=512) :: path |
| 534 | path = previous_breadcrumb_path |
| 535 | end function get_previous_breadcrumb_path |
| 536 | |
| 537 | ! Clear the previous breadcrumb path |
| 538 | subroutine clear_previous_breadcrumb_path() |
| 539 | previous_breadcrumb_path = "" |
| 540 | end subroutine clear_previous_breadcrumb_path |
| 541 | |
| 542 | ! Helper: Find which segment is at given position |
| 543 | function find_segment_at_position(x, y) result(segment_index) |
| 544 | real(c_double), intent(in) :: x, y |
| 545 | integer :: segment_index |
| 546 | integer :: i, total_segments |
| 547 | |
| 548 | segment_index = 0 |
| 549 | total_segments = cached_segment_count + cached_forward_segment_count |
| 550 | |
| 551 | ! Check all segments (regular + forward) |
| 552 | do i = 1, total_segments |
| 553 | if (x >= segment_rects(i)%x .and. & |
| 554 | x <= segment_rects(i)%x + segment_rects(i)%width .and. & |
| 555 | y >= segment_rects(i)%y .and. & |
| 556 | y <= segment_rects(i)%y + segment_rects(i)%height) then |
| 557 | segment_index = i |
| 558 | return |
| 559 | end if |
| 560 | end do |
| 561 | end function find_segment_at_position |
| 562 | |
| 563 | end module breadcrumb_widget |
| 564 |