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|---|---|---|---|
| 1 | #include <errno.h> | ||
| 2 | #include <stdlib.h> | ||
| 3 | #include <unistd.h> | ||
| 4 | #include "window.h" | ||
| 5 | #include "command/error.h" | ||
| 6 | #include "editor.h" | ||
| 7 | #include "file-history.h" | ||
| 8 | #include "load-save.h" | ||
| 9 | #include "lock.h" | ||
| 10 | #include "move.h" | ||
| 11 | #include "util/path.h" | ||
| 12 | #include "util/strtonum.h" | ||
| 13 | #include "util/xmalloc.h" | ||
| 14 | #include "util/xstring.h" | ||
| 15 | |||
| 16 | 13 | Window *new_window(EditorState *e) | |
| 17 | { | ||
| 18 | 13 | Window *window = xcalloc1(sizeof(Window)); | |
| 19 | 13 | window->editor = e; | |
| 20 | 13 | return window; | |
| 21 | } | ||
| 22 | |||
| 23 | 84 | View *window_add_buffer(Window *window, Buffer *buffer) | |
| 24 | { | ||
| 25 | // We rely on this being 0, for implicit initialization of | ||
| 26 | // View::selection and View::select_mode | ||
| 27 | 84 | static_assert(SELECT_NONE == 0); | |
| 28 | |||
| 29 | 84 | View *view = xmalloc(sizeof(*view)); | |
| 30 | 84 | *view = (View) { | |
| 31 | .buffer = buffer, | ||
| 32 | .window = window, | ||
| 33 | 84 | .cursor = block_iter(buffer), | |
| 34 | }; | ||
| 35 | |||
| 36 | 84 | ptr_array_append(&buffer->views, view); | |
| 37 | 84 | ptr_array_append(&window->views, view); | |
| 38 | 84 | window->update_tabbar = true; | |
| 39 | 84 | return view; | |
| 40 | } | ||
| 41 | |||
| 42 | 49 | View *window_open_empty_buffer(Window *window) | |
| 43 | { | ||
| 44 | 49 | EditorState *e = window->editor; | |
| 45 | 49 | return window_add_buffer(window, open_empty_buffer(&e->buffers, &e->options)); | |
| 46 | } | ||
| 47 | |||
| 48 | 29 | View *window_open_buffer ( | |
| 49 | Window *window, | ||
| 50 | const char *filename, | ||
| 51 | bool must_exist, | ||
| 52 | const char *encoding | ||
| 53 | ) { | ||
| 54 | 29 | ErrorBuffer *ebuf = &window->editor->err; | |
| 55 |
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29 | if (unlikely(filename[0] == '\0')) { |
| 56 | 1 | error_msg(ebuf, "Empty filename not allowed"); | |
| 57 | 1 | return NULL; | |
| 58 | } | ||
| 59 | |||
| 60 | 28 | char *absolute = path_absolute(filename); | |
| 61 |
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28 | if (!absolute) { |
| 62 | 1 | bool nodir = (errno == ENOENT); // New file in non-existing dir (usually a mistake) | |
| 63 |
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1 | const char *err = nodir ? "Directory does not exist" : strerror(errno); |
| 64 | 1 | error_msg(ebuf, "Error opening %s: %s", filename, err); | |
| 65 | 1 | return NULL; | |
| 66 | } | ||
| 67 | |||
| 68 | 27 | EditorState *e = window->editor; | |
| 69 | 27 | Buffer *buffer = find_buffer(&e->buffers, absolute); | |
| 70 |
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27 | if (buffer) { |
| 71 | // File already open in editor | ||
| 72 | ✗ | if (!streq(absolute, buffer->abs_filename)) { | |
| 73 | ✗ | const char *bufname = buffer_filename(buffer); | |
| 74 | ✗ | char *s = short_filename(absolute, &e->home_dir); | |
| 75 | ✗ | info_msg(ebuf, "%s and %s are the same file", s, bufname); // Hard links | |
| 76 | ✗ | free(s); | |
| 77 | } | ||
| 78 | ✗ | free(absolute); | |
| 79 | ✗ | return window_find_or_create_view(window, buffer); | |
| 80 | } | ||
| 81 | |||
| 82 | 27 | buffer = buffer_new(&e->buffers, &e->options, encoding); | |
| 83 |
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27 | if (!load_buffer(buffer, filename, &e->options, &e->err, must_exist)) { |
| 84 | 1 | buffer_remove_unlock_and_free(&e->buffers, buffer, &e->err, &e->locks_ctx); | |
| 85 | 1 | free(absolute); | |
| 86 | 1 | return NULL; | |
| 87 | } | ||
| 88 | |||
| 89 | 26 | BUG_ON(!absolute); | |
| 90 | 26 | BUG_ON(!path_is_absolute(absolute)); | |
| 91 | 26 | buffer->abs_filename = absolute; | |
| 92 | 26 | buffer_update_short_filename(buffer, &e->home_dir); | |
| 93 | |||
| 94 |
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26 | if (e->options.lock_files) { |
| 95 | ✗ | if (!lock_file(&e->locks_ctx, ebuf, buffer->abs_filename)) { | |
| 96 | ✗ | buffer->readonly = true; | |
| 97 | } else { | ||
| 98 | ✗ | buffer->locked = true; | |
| 99 | } | ||
| 100 | } | ||
| 101 | |||
| 102 |
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26 | if (buffer->file.mode != 0 && !buffer->readonly && access(filename, W_OK)) { |
| 103 | ✗ | error_msg(ebuf, "No write permission to %s, marking read-only", filename); | |
| 104 | ✗ | buffer->readonly = true; | |
| 105 | } | ||
| 106 | |||
| 107 | 26 | return window_add_buffer(window, buffer); | |
| 108 | } | ||
| 109 | |||
| 110 | 1 | View *window_find_or_create_view(Window *window, Buffer *buffer) | |
| 111 | { | ||
| 112 | 1 | View *view = window_find_view(window, buffer); | |
| 113 |
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1 | if (!view) { |
| 114 | // Buffer isn't open in this window; create a new view of it | ||
| 115 | ✗ | view = window_add_buffer(window, buffer); | |
| 116 | ✗ | view->cursor = buffer_get_first_view(buffer)->cursor; | |
| 117 | } | ||
| 118 | 1 | return view; | |
| 119 | } | ||
| 120 | |||
| 121 | 1 | View *window_find_view(Window *window, Buffer *buffer) | |
| 122 | { | ||
| 123 |
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1 | for (size_t i = 0, n = buffer->views.count; i < n; i++) { |
| 124 | 1 | View *view = buffer->views.ptrs[i]; | |
| 125 |
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1 | if (view->window == window) { |
| 126 | return view; | ||
| 127 | } | ||
| 128 | } | ||
| 129 | // Buffer isn't open in this window | ||
| 130 | return NULL; | ||
| 131 | } | ||
| 132 | |||
| 133 | 4 | View *window_find_unclosable_view(Window *window) | |
| 134 | { | ||
| 135 | // Check active view first | ||
| 136 |
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4 | if (window->view && !view_can_close(window->view)) { |
| 137 | 2 | return window->view; | |
| 138 | } | ||
| 139 | |||
| 140 | 2 | void **ptrs = window->views.ptrs; | |
| 141 |
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4 | for (size_t i = 0, n = window->views.count; i < n; i++) { |
| 142 | 2 | View *view = ptrs[i]; | |
| 143 |
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2 | if (!view_can_close(view)) { |
| 144 | return view; | ||
| 145 | } | ||
| 146 | } | ||
| 147 | |||
| 148 | return NULL; | ||
| 149 | } | ||
| 150 | |||
| 151 | 14 | static void window_remove_views(Window *window) | |
| 152 | { | ||
| 153 |
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72 | while (window->views.count > 0) { |
| 154 | 58 | View *view = window->views.ptrs[window->views.count - 1]; | |
| 155 | 58 | remove_view(view); | |
| 156 | } | ||
| 157 | 14 | } | |
| 158 | |||
| 159 | // NOTE: window->frame isn't removed | ||
| 160 | 13 | void window_free(Window *window) | |
| 161 | { | ||
| 162 | 13 | window_remove_views(window); | |
| 163 | 13 | ptr_array_free_array(&window->views); | |
| 164 | 13 | window->frame = NULL; | |
| 165 | 13 | free(window); | |
| 166 | 13 | } | |
| 167 | |||
| 168 | // Remove view from view->window and view->buffer->views and free it | ||
| 169 | 84 | size_t remove_view(View *view) | |
| 170 | { | ||
| 171 | 84 | Window *window = view->window; | |
| 172 | 84 | window->update_tabbar = true; | |
| 173 |
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84 | if (view == window->prev_view) { |
| 174 | 2 | window->prev_view = NULL; | |
| 175 | } | ||
| 176 | |||
| 177 | 84 | EditorState *e = window->editor; | |
| 178 |
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84 | if (view == e->view) { |
| 179 | 37 | e->view = NULL; | |
| 180 | 37 | e->buffer = NULL; | |
| 181 | } | ||
| 182 | |||
| 183 | 84 | size_t idx = ptr_array_remove(&window->views, view); | |
| 184 | 84 | Buffer *buffer = view->buffer; | |
| 185 | 84 | ptr_array_remove(&buffer->views, view); | |
| 186 | |||
| 187 |
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84 | if (buffer->views.count == 0) { |
| 188 |
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83 | if (buffer->options.file_history && buffer->abs_filename) { |
| 189 | 44 | FileHistory *hist = &e->file_history; | |
| 190 | 44 | file_history_append(hist, view->cy + 1, view->cx_char + 1, buffer->abs_filename); | |
| 191 | } | ||
| 192 | 83 | buffer_remove_unlock_and_free(&e->buffers, buffer, &e->err, &e->locks_ctx); | |
| 193 | } | ||
| 194 | |||
| 195 | 84 | free(view); | |
| 196 | 84 | return idx; | |
| 197 | } | ||
| 198 | |||
| 199 | 26 | void window_close_current_view(Window *window) | |
| 200 | { | ||
| 201 | 26 | size_t idx = remove_view(window->view); | |
| 202 |
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26 | if (window->prev_view) { |
| 203 | 21 | window->view = window->prev_view; | |
| 204 | 21 | window->prev_view = NULL; | |
| 205 | 21 | return; | |
| 206 | } | ||
| 207 | |||
| 208 | 5 | const PointerArray *views = &window->views; | |
| 209 |
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5 | if (views->count == 0) { |
| 210 | 1 | window_open_empty_buffer(window); | |
| 211 | } | ||
| 212 | |||
| 213 | 5 | idx -= (views->count == idx); | |
| 214 | 5 | window->view = views->ptrs[idx]; | |
| 215 | } | ||
| 216 | |||
| 217 | 4 | static void restore_cursor_from_history(const FileHistory *hist, View *view) | |
| 218 | { | ||
| 219 | 4 | unsigned long row, col; | |
| 220 |
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4 | if (file_history_find(hist, view->buffer->abs_filename, &row, &col)) { |
| 221 | 1 | move_to_filepos(view, row, col); | |
| 222 | } | ||
| 223 | 4 | } | |
| 224 | |||
| 225 | // Make `view` the current View in the editor, so that it takes input | ||
| 226 | // focus and becomes the active tab in its Window | ||
| 227 | 95 | void set_view(View *view) | |
| 228 | { | ||
| 229 | 95 | EditorState *e = view->window->editor; | |
| 230 |
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95 | if (e->view == view) { |
| 231 | return; | ||
| 232 | } | ||
| 233 | |||
| 234 | // Forget `prev_view` when switching views. cmd_open(), cmd_reopen(), | ||
| 235 | // cmd_show() and cmd_exec() subsequently set it as appropriate, via | ||
| 236 | // window_open_new_file() or maybe_set_view(). | ||
| 237 |
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85 | if (e->window) { |
| 238 | 83 | e->window->prev_view = NULL; | |
| 239 | } | ||
| 240 | |||
| 241 | 85 | e->view = view; | |
| 242 | 85 | e->buffer = view->buffer; | |
| 243 | 85 | e->window = view->window; // Parent Window becomes current Window | |
| 244 | 85 | e->window->view = view; | |
| 245 | |||
| 246 |
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85 | if (!view->buffer->setup) { |
| 247 | // Run deferred initialization for view->buffer. This is done when | ||
| 248 | // buffers are first viewed instead of when they're opened, so as | ||
| 249 | // to allow opening many files without a sudden flood of extra work | ||
| 250 | // (e.g. loading multiple dte-syntax(5) files). | ||
| 251 | 59 | buffer_setup(e, view->buffer); | |
| 252 |
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59 | if (view->buffer->options.file_history && view->buffer->abs_filename) { |
| 253 | 4 | restore_cursor_from_history(&e->file_history, view); | |
| 254 | } | ||
| 255 | } | ||
| 256 | |||
| 257 | // view.cursor can be invalid if same buffer was modified from another view | ||
| 258 |
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85 | if (view->restore_cursor) { |
| 259 | 1 | view->cursor.blk = BLOCK(view->buffer->blocks.next); | |
| 260 | 1 | block_iter_goto_offset(&view->cursor, view->saved_cursor_offset); | |
| 261 | 1 | view->restore_cursor = false; | |
| 262 | 1 | view->saved_cursor_offset = 0; | |
| 263 | } | ||
| 264 | |||
| 265 | // Save cursor states of views sharing same buffer | ||
| 266 | 85 | void **ptrs = view->buffer->views.ptrs; | |
| 267 |
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171 | for (size_t i = 0, n = view->buffer->views.count; i < n; i++) { |
| 268 | 86 | View *other = ptrs[i]; | |
| 269 |
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86 | if (other != view) { |
| 270 | 1 | other->saved_cursor_offset = block_iter_get_offset(&other->cursor); | |
| 271 | 1 | other->restore_cursor = true; | |
| 272 | } | ||
| 273 | } | ||
| 274 | } | ||
| 275 | |||
| 276 | 43 | View *window_open_new_file(Window *window) | |
| 277 | { | ||
| 278 | 43 | View *prev = window->view; | |
| 279 | 43 | View *view = window_open_empty_buffer(window); | |
| 280 | 43 | set_view(view); | |
| 281 | 43 | window->prev_view = prev; | |
| 282 | 43 | return view; | |
| 283 | } | ||
| 284 | |||
| 285 | 3 | static bool buffer_is_untouched(const Buffer *b) | |
| 286 | { | ||
| 287 |
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3 | return !b->abs_filename && b->change_head.nr_prev == 0 && !b->display_filename; |
| 288 | } | ||
| 289 | |||
| 290 | 6 | static View *maybe_set_view(Window *window, View *view, View *prev, bool set_prev) | |
| 291 | { | ||
| 292 |
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6 | if (view && view != prev) { |
| 293 |
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3 | bool useless_prev = prev && buffer_is_untouched(prev->buffer); |
| 294 | 3 | set_view(view); | |
| 295 |
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3 | if (useless_prev && window->views.count == 2) { |
| 296 | // If window contains only one untouched buffer it'll be closed | ||
| 297 | // after opening another view. This is done because closing the | ||
| 298 | // last view (with window_close_current_view()) causes an empty | ||
| 299 | // view to be opened (windows must contain at least one buffer). | ||
| 300 | ✗ | remove_view(prev); | |
| 301 |
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3 | } else if (set_prev) { |
| 302 | 2 | window->prev_view = prev; | |
| 303 | } | ||
| 304 | } | ||
| 305 | 6 | return view; | |
| 306 | } | ||
| 307 | |||
| 308 | 1 | View *window_open_file(Window *window, const char *filename, const char *encoding) | |
| 309 | { | ||
| 310 | 1 | View *prev = window->view; | |
| 311 | 1 | View *view = window_open_buffer(window, filename, false, encoding); | |
| 312 | 1 | return maybe_set_view(window, view, prev, true); | |
| 313 | } | ||
| 314 | |||
| 315 | // Open multiple files in window and return the first opened View | ||
| 316 | 5 | View *window_open_files(Window *window, char **filenames, const char *encoding) | |
| 317 | { | ||
| 318 | 5 | View *prev = window->view; | |
| 319 | 5 | View *first = NULL; | |
| 320 | 5 | size_t prev_nr_views = window->views.count; | |
| 321 | |||
| 322 |
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32 | for (size_t i = 0; filenames[i]; i++) { |
| 323 | 27 | View *view = window_open_buffer(window, filenames[i], false, encoding); | |
| 324 |
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27 | if (view && !first) { |
| 325 | 2 | first = view; | |
| 326 | } | ||
| 327 | } | ||
| 328 | |||
| 329 | // `Window::prev_view` is set only if a single new view was opened | ||
| 330 | 5 | size_t nr_new_views = window->views.count - prev_nr_views; | |
| 331 | 5 | return maybe_set_view(window, first, prev, nr_new_views == 1); | |
| 332 | } | ||
| 333 | |||
| 334 | 21 | void buffer_mark_tabbars_changed(Buffer *buffer) | |
| 335 | { | ||
| 336 |
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43 | for (size_t i = 0, n = buffer->views.count; i < n; i++) { |
| 337 | 22 | View *view = buffer->views.ptrs[i]; | |
| 338 | 22 | view->window->update_tabbar = true; | |
| 339 | } | ||
| 340 | 21 | } | |
| 341 | |||
| 342 | 62 | static int line_numbers_width(const GlobalOptions *options, const View *view) | |
| 343 | { | ||
| 344 |
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62 | if (!options->show_line_numbers || !view) { |
| 345 | return 0; | ||
| 346 | } | ||
| 347 | 6 | size_t width = size_str_width(view->buffer->nl) + 1; | |
| 348 | 6 | return MAX(width, LINE_NUMBERS_MIN_WIDTH); | |
| 349 | } | ||
| 350 | |||
| 351 | 41 | static int edit_x_offset(const GlobalOptions *options, const View *view) | |
| 352 | { | ||
| 353 | 41 | return line_numbers_width(options, view); | |
| 354 | } | ||
| 355 | |||
| 356 | 41 | static int edit_y_offset(const GlobalOptions *options) | |
| 357 | { | ||
| 358 | 41 | return options->tab_bar ? 1 : 0; | |
| 359 | } | ||
| 360 | |||
| 361 | 21 | static void set_edit_size(Window *window, const GlobalOptions *options) | |
| 362 | { | ||
| 363 | 21 | int xo = edit_x_offset(options, window->view); | |
| 364 | 21 | int yo = edit_y_offset(options); | |
| 365 | 21 | window->edit_w = window->w - xo; | |
| 366 | 21 | window->edit_h = window->h - yo - 1; // statusline | |
| 367 | 21 | window->edit_x = window->x + xo; | |
| 368 | 21 | } | |
| 369 | |||
| 370 | 21 | void window_calculate_line_numbers(Window *window) | |
| 371 | { | ||
| 372 | 21 | const GlobalOptions *options = &window->editor->options; | |
| 373 | 21 | int w = line_numbers_width(options, window->view); | |
| 374 |
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21 | if (w != window->line_numbers.width) { |
| 375 | 1 | window->line_numbers.width = w; | |
| 376 | 1 | window->line_numbers.first = 0; | |
| 377 | 1 | window->line_numbers.last = 0; | |
| 378 | 1 | mark_all_lines_changed(window->view->buffer); | |
| 379 | } | ||
| 380 | 21 | set_edit_size(window, options); | |
| 381 | 21 | } | |
| 382 | |||
| 383 | 20 | void window_set_coordinates(Window *window, int x, int y) | |
| 384 | { | ||
| 385 | 20 | const GlobalOptions *options = &window->editor->options; | |
| 386 | 20 | window->x = x; | |
| 387 | 20 | window->y = y; | |
| 388 | 20 | window->edit_x = x + edit_x_offset(options, window->view); | |
| 389 | 20 | window->edit_y = y + edit_y_offset(options); | |
| 390 | 20 | } | |
| 391 | |||
| 392 | 21 | void window_set_size(Window *window, int w, int h) | |
| 393 | { | ||
| 394 | 21 | window->w = w; | |
| 395 | 21 | window->h = h; | |
| 396 | 21 | window_calculate_line_numbers(window); | |
| 397 | 21 | } | |
| 398 | |||
| 399 | 7 | unsigned int window_get_scroll_margin(const Window *window) | |
| 400 | { | ||
| 401 | 7 | int edit_h = window->edit_h; | |
| 402 |
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7 | if (unlikely(edit_h <= 2)) { |
| 403 | return 0; | ||
| 404 | } | ||
| 405 | |||
| 406 | ✗ | unsigned int max = (edit_h - 1) / 2; | |
| 407 | ✗ | unsigned int scroll_margin = window->editor->options.scroll_margin; | |
| 408 | ✗ | return MIN(max, scroll_margin); | |
| 409 | } | ||
| 410 | |||
| 411 | // Recursion is bounded by the number of descendant frames, which is | ||
| 412 | // typically not more than 5 or so | ||
| 413 | // NOLINTNEXTLINE(misc-no-recursion) | ||
| 414 | 12 | void frame_for_each_window(const Frame *frame, void (*func)(Window*, void*), void *data) | |
| 415 | { | ||
| 416 |
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12 | if (frame->window) { |
| 417 | 10 | func(frame->window, data); | |
| 418 | 10 | return; | |
| 419 | } | ||
| 420 | |||
| 421 | 2 | void **ptrs = frame->frames.ptrs; | |
| 422 |
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6 | for (size_t i = 0, n = frame->frames.count; i < n; i++) { |
| 423 | 4 | frame_for_each_window(ptrs[i], func, data); | |
| 424 | } | ||
| 425 | } | ||
| 426 | |||
| 427 | typedef struct { | ||
| 428 | const Window *const target; // Window to search for (set at init.) | ||
| 429 | Window *first; // Window passed in first callback invocation | ||
| 430 | Window *last; // Window passed in last callback invocation | ||
| 431 | Window *prev; // Window immediately before target (if any) | ||
| 432 | Window *next; // Window immediately after target (if any) | ||
| 433 | bool found; // Set to true when target is found | ||
| 434 | } WindowCallbackData; | ||
| 435 | |||
| 436 | 6 | static void find_prev_and_next(Window *window, void *ud) | |
| 437 | { | ||
| 438 | 6 | WindowCallbackData *data = ud; | |
| 439 | 6 | data->last = window; | |
| 440 |
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6 | if (data->found) { |
| 441 |
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1 | if (!data->next) { |
| 442 | 1 | data->next = window; | |
| 443 | } | ||
| 444 | 1 | return; | |
| 445 | } | ||
| 446 |
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5 | if (!data->first) { |
| 447 | 4 | data->first = window; | |
| 448 | } | ||
| 449 |
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5 | if (window == data->target) { |
| 450 | 4 | data->found = true; | |
| 451 | 4 | return; | |
| 452 | } | ||
| 453 | 1 | data->prev = window; | |
| 454 | } | ||
| 455 | |||
| 456 | 1 | Window *window_prev(Window *window) | |
| 457 | { | ||
| 458 | 1 | WindowCallbackData data = {.target = window}; | |
| 459 | 1 | frame_for_each_window(window->editor->root_frame, find_prev_and_next, &data); | |
| 460 | 1 | BUG_ON(!data.found); | |
| 461 |
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1 | return data.prev ? data.prev : data.last; |
| 462 | } | ||
| 463 | |||
| 464 | 1 | Window *window_next(Window *window) | |
| 465 | { | ||
| 466 | 1 | WindowCallbackData data = {.target = window}; | |
| 467 | 1 | frame_for_each_window(window->editor->root_frame, find_prev_and_next, &data); | |
| 468 | 1 | BUG_ON(!data.found); | |
| 469 |
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1 | return data.next ? data.next : data.first; |
| 470 | } | ||
| 471 | |||
| 472 | 3 | void window_close(Window *window) | |
| 473 | { | ||
| 474 | 3 | EditorState *e = window->editor; | |
| 475 |
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3 | if (!window->frame->parent) { |
| 476 | // Don't close last window | ||
| 477 | 1 | window_remove_views(window); | |
| 478 | 1 | set_view(window_open_empty_buffer(window)); | |
| 479 | 1 | return; | |
| 480 | } | ||
| 481 | |||
| 482 | 2 | WindowCallbackData data = {.target = window}; | |
| 483 | 2 | frame_for_each_window(e->root_frame, find_prev_and_next, &data); | |
| 484 | 2 | BUG_ON(!data.found); | |
| 485 |
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2 | Window *next_or_prev = data.next ? data.next : data.prev; |
| 486 | 2 | BUG_ON(!next_or_prev); | |
| 487 | |||
| 488 | 2 | frame_remove(e, window->frame); | |
| 489 | 2 | e->window = NULL; | |
| 490 | 2 | set_view(next_or_prev->view); | |
| 491 | |||
| 492 | 2 | e->screen_update |= UPDATE_ALL; | |
| 493 | 2 | frame_debug(e->root_frame); | |
| 494 | } | ||
| 495 |