Mercurial > vim
annotate src/move.c @ 15975:915ed7ca92fa v8.1.0993
patch 8.1.0993: ch_read() may return garbage if terminating NL is missing
commit https://github.com/vim/vim/commit/772153f8d85c83e08427d93460a676d7f079f002
Author: Bram Moolenaar <Bram@vim.org>
Date: Mon Mar 4 12:09:49 2019 +0100
patch 8.1.0993: ch_read() may return garbage if terminating NL is missing
Problem: ch_read() may return garbage if terminating NL is missing.
Solution: Add terminating NUL. (Ozaki Kiichi, closes https://github.com/vim/vim/issues/4065)
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Mon, 04 Mar 2019 12:15:05 +0100 |
| parents | ad8b2c109b22 |
| children | 7952be788a49 |
| rev | line source |
|---|---|
|
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commit https://github.com/vim/vim/commit/edf3f97ae2af024708ebb4ac614227327033ca47
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 /* | |
| 10 * move.c: Functions for moving the cursor and scrolling text. | |
| 11 * | |
| 12 * There are two ways to move the cursor: | |
| 13 * 1. Move the cursor directly, the text is scrolled to keep the cursor in the | |
| 14 * window. | |
| 15 * 2. Scroll the text, the cursor is moved into the text visible in the | |
| 16 * window. | |
| 17 * The 'scrolloff' option makes this a bit complicated. | |
| 18 */ | |
| 19 | |
| 20 #include "vim.h" | |
| 21 | |
|
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22 static int scrolljump_value(void); |
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23 static int check_top_offset(void); |
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24 static void curs_rows(win_T *wp); |
| 7 | 25 |
| 26 typedef struct | |
| 27 { | |
| 28 linenr_T lnum; /* line number */ | |
| 29 #ifdef FEAT_DIFF | |
| 30 int fill; /* filler lines */ | |
| 31 #endif | |
| 32 int height; /* height of added line */ | |
| 33 } lineoff_T; | |
| 34 | |
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35 static void topline_back(lineoff_T *lp); |
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36 static void botline_forw(lineoff_T *lp); |
| 7 | 37 |
| 38 /* | |
| 39 * Compute wp->w_botline for the current wp->w_topline. Can be called after | |
| 40 * wp->w_topline changed. | |
| 41 */ | |
| 42 static void | |
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43 comp_botline(win_T *wp) |
| 7 | 44 { |
| 45 int n; | |
| 46 linenr_T lnum; | |
| 47 int done; | |
| 48 #ifdef FEAT_FOLDING | |
| 49 linenr_T last; | |
| 50 int folded; | |
| 51 #endif | |
| 52 | |
| 53 /* | |
| 54 * If w_cline_row is valid, start there. | |
| 55 * Otherwise have to start at w_topline. | |
| 56 */ | |
| 57 check_cursor_moved(wp); | |
| 58 if (wp->w_valid & VALID_CROW) | |
| 59 { | |
| 60 lnum = wp->w_cursor.lnum; | |
| 61 done = wp->w_cline_row; | |
| 62 } | |
| 63 else | |
| 64 { | |
| 65 lnum = wp->w_topline; | |
| 66 done = 0; | |
| 67 } | |
| 68 | |
| 69 for ( ; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum) | |
| 70 { | |
| 71 #ifdef FEAT_FOLDING | |
| 72 last = lnum; | |
| 73 folded = FALSE; | |
| 74 if (hasFoldingWin(wp, lnum, NULL, &last, TRUE, NULL)) | |
| 75 { | |
| 76 n = 1; | |
| 77 folded = TRUE; | |
| 78 } | |
| 79 else | |
| 80 #endif | |
| 81 #ifdef FEAT_DIFF | |
| 82 if (lnum == wp->w_topline) | |
| 83 n = plines_win_nofill(wp, lnum, TRUE) + wp->w_topfill; | |
| 84 else | |
| 85 #endif | |
| 86 n = plines_win(wp, lnum, TRUE); | |
| 87 if ( | |
| 88 #ifdef FEAT_FOLDING | |
| 89 lnum <= wp->w_cursor.lnum && last >= wp->w_cursor.lnum | |
| 90 #else | |
| 91 lnum == wp->w_cursor.lnum | |
| 92 #endif | |
| 93 ) | |
| 94 { | |
| 95 wp->w_cline_row = done; | |
| 96 wp->w_cline_height = n; | |
| 97 #ifdef FEAT_FOLDING | |
| 98 wp->w_cline_folded = folded; | |
| 99 #endif | |
| 5764 | 100 redraw_for_cursorline(wp); |
| 7 | 101 wp->w_valid |= (VALID_CROW|VALID_CHEIGHT); |
| 102 } | |
| 103 if (done + n > wp->w_height) | |
| 104 break; | |
| 105 done += n; | |
| 106 #ifdef FEAT_FOLDING | |
| 107 lnum = last; | |
| 108 #endif | |
| 109 } | |
| 110 | |
| 111 /* wp->w_botline is the line that is just below the window */ | |
| 112 wp->w_botline = lnum; | |
| 113 wp->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 114 | |
| 115 set_empty_rows(wp, done); | |
| 116 } | |
| 117 | |
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118 #ifdef FEAT_SYN_HL |
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119 void |
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120 reset_cursorline(void) |
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121 { |
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122 curwin->w_last_cursorline = 0; |
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123 } |
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124 #endif |
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125 |
| 7 | 126 /* |
| 5764 | 127 * Redraw when w_cline_row changes and 'relativenumber' or 'cursorline' is |
| 128 * set. | |
| 129 */ | |
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130 void |
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131 redraw_for_cursorline(win_T *wp) |
| 5764 | 132 { |
| 133 if ((wp->w_p_rnu | |
| 134 #ifdef FEAT_SYN_HL | |
| 135 || wp->w_p_cul | |
| 136 #endif | |
| 137 ) | |
| 138 && (wp->w_valid & VALID_CROW) == 0 | |
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139 #ifdef FEAT_INS_EXPAND |
| 5764 | 140 && !pum_visible() |
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141 #endif |
| 5764 | 142 ) |
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143 { |
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144 if (wp->w_p_rnu) |
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145 // win_line() will redraw the number column only. |
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146 redraw_win_later(wp, VALID); |
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147 #ifdef FEAT_SYN_HL |
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148 if (wp->w_p_cul) |
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149 { |
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150 if (wp->w_redr_type <= VALID && wp->w_last_cursorline != 0) |
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151 { |
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152 // "w_last_cursorline" may be outdated, worst case we redraw |
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153 // too much. This is optimized for moving the cursor around in |
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154 // the current window. |
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155 redrawWinline(wp, wp->w_last_cursorline); |
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156 redrawWinline(wp, wp->w_cursor.lnum); |
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157 } |
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158 else |
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159 redraw_win_later(wp, SOME_VALID); |
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160 } |
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161 #endif |
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162 } |
| 5764 | 163 } |
| 164 | |
| 165 /* | |
| 7 | 166 * Update curwin->w_topline and redraw if necessary. |
| 167 * Used to update the screen before printing a message. | |
| 168 */ | |
| 169 void | |
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170 update_topline_redraw(void) |
| 7 | 171 { |
| 172 update_topline(); | |
| 173 if (must_redraw) | |
| 174 update_screen(0); | |
| 175 } | |
| 176 | |
| 177 /* | |
| 178 * Update curwin->w_topline to move the cursor onto the screen. | |
| 179 */ | |
| 180 void | |
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181 update_topline(void) |
| 7 | 182 { |
| 183 long line_count; | |
| 184 int halfheight; | |
| 185 int n; | |
| 186 linenr_T old_topline; | |
| 187 #ifdef FEAT_DIFF | |
| 188 int old_topfill; | |
| 189 #endif | |
| 190 #ifdef FEAT_FOLDING | |
| 191 linenr_T lnum; | |
| 192 #endif | |
| 193 int check_topline = FALSE; | |
| 194 int check_botline = FALSE; | |
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195 long *so_ptr = curwin->w_p_so >= 0 ? &curwin->w_p_so : &p_so; |
| 7 | 196 #ifdef FEAT_MOUSE |
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197 int save_so = *so_ptr; |
| 7 | 198 #endif |
| 199 | |
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200 /* If there is no valid screen and when the window height is zero just use |
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201 * the cursor line. */ |
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202 if (!screen_valid(TRUE) || curwin->w_height == 0) |
| 6247 | 203 { |
| 204 curwin->w_topline = curwin->w_cursor.lnum; | |
| 205 curwin->w_botline = curwin->w_topline; | |
| 206 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 207 curwin->w_scbind_pos = 1; | |
| 208 return; | |
| 209 } | |
| 210 | |
| 7 | 211 check_cursor_moved(curwin); |
| 212 if (curwin->w_valid & VALID_TOPLINE) | |
| 213 return; | |
| 214 | |
| 215 #ifdef FEAT_MOUSE | |
| 216 /* When dragging with the mouse, don't scroll that quickly */ | |
| 1121 | 217 if (mouse_dragging > 0) |
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218 *so_ptr = mouse_dragging - 1; |
| 7 | 219 #endif |
| 220 | |
| 221 old_topline = curwin->w_topline; | |
| 222 #ifdef FEAT_DIFF | |
| 223 old_topfill = curwin->w_topfill; | |
| 224 #endif | |
| 225 | |
| 226 /* | |
| 227 * If the buffer is empty, always set topline to 1. | |
| 228 */ | |
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229 if (BUFEMPTY()) /* special case - file is empty */ |
| 7 | 230 { |
| 231 if (curwin->w_topline != 1) | |
| 232 redraw_later(NOT_VALID); | |
| 233 curwin->w_topline = 1; | |
| 234 curwin->w_botline = 2; | |
| 235 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 236 curwin->w_scbind_pos = 1; | |
| 237 } | |
| 238 | |
| 239 /* | |
| 240 * If the cursor is above or near the top of the window, scroll the window | |
| 241 * to show the line the cursor is in, with 'scrolloff' context. | |
| 242 */ | |
| 243 else | |
| 244 { | |
| 245 if (curwin->w_topline > 1) | |
| 246 { | |
| 247 /* If the cursor is above topline, scrolling is always needed. | |
| 248 * If the cursor is far below topline and there is no folding, | |
| 249 * scrolling down is never needed. */ | |
| 250 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 251 check_topline = TRUE; | |
| 252 else if (check_top_offset()) | |
| 253 check_topline = TRUE; | |
| 254 } | |
| 255 #ifdef FEAT_DIFF | |
| 256 /* Check if there are more filler lines than allowed. */ | |
| 257 if (!check_topline && curwin->w_topfill > diff_check_fill(curwin, | |
| 258 curwin->w_topline)) | |
| 259 check_topline = TRUE; | |
| 260 #endif | |
| 261 | |
| 262 if (check_topline) | |
| 263 { | |
| 264 halfheight = curwin->w_height / 2 - 1; | |
| 265 if (halfheight < 2) | |
| 266 halfheight = 2; | |
| 267 | |
| 268 #ifdef FEAT_FOLDING | |
| 269 if (hasAnyFolding(curwin)) | |
| 270 { | |
| 271 /* Count the number of logical lines between the cursor and | |
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272 * topline + scrolloff (approximation of how much will be |
| 7 | 273 * scrolled). */ |
| 274 n = 0; | |
| 275 for (lnum = curwin->w_cursor.lnum; | |
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276 lnum < curwin->w_topline + *so_ptr; ++lnum) |
| 7 | 277 { |
| 278 ++n; | |
| 279 /* stop at end of file or when we know we are far off */ | |
| 280 if (lnum >= curbuf->b_ml.ml_line_count || n >= halfheight) | |
| 281 break; | |
| 282 (void)hasFolding(lnum, NULL, &lnum); | |
| 283 } | |
| 284 } | |
| 285 else | |
| 286 #endif | |
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287 n = curwin->w_topline + *so_ptr - curwin->w_cursor.lnum; |
| 7 | 288 |
| 289 /* If we weren't very close to begin with, we scroll to put the | |
| 290 * cursor in the middle of the window. Otherwise put the cursor | |
| 291 * near the top of the window. */ | |
| 292 if (n >= halfheight) | |
| 293 scroll_cursor_halfway(FALSE); | |
| 294 else | |
| 295 { | |
| 532 | 296 scroll_cursor_top(scrolljump_value(), FALSE); |
| 7 | 297 check_botline = TRUE; |
| 298 } | |
| 299 } | |
| 300 | |
| 301 else | |
| 302 { | |
| 303 #ifdef FEAT_FOLDING | |
| 304 /* Make sure topline is the first line of a fold. */ | |
| 305 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 306 #endif | |
| 307 check_botline = TRUE; | |
| 308 } | |
| 309 } | |
| 310 | |
| 311 /* | |
| 312 * If the cursor is below the bottom of the window, scroll the window | |
| 313 * to put the cursor on the window. | |
| 314 * When w_botline is invalid, recompute it first, to avoid a redraw later. | |
| 315 * If w_botline was approximated, we might need a redraw later in a few | |
| 316 * cases, but we don't want to spend (a lot of) time recomputing w_botline | |
| 317 * for every small change. | |
| 318 */ | |
| 319 if (check_botline) | |
| 320 { | |
| 321 if (!(curwin->w_valid & VALID_BOTLINE_AP)) | |
| 322 validate_botline(); | |
| 323 | |
| 324 if (curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 325 { | |
| 1744 | 326 if (curwin->w_cursor.lnum < curwin->w_botline) |
| 327 { | |
| 328 if (((long)curwin->w_cursor.lnum | |
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329 >= (long)curwin->w_botline - *so_ptr |
| 7 | 330 #ifdef FEAT_FOLDING |
| 331 || hasAnyFolding(curwin) | |
| 332 #endif | |
| 333 )) | |
| 1744 | 334 { |
| 7 | 335 lineoff_T loff; |
| 336 | |
| 1744 | 337 /* Cursor is (a few lines) above botline, check if there are |
| 338 * 'scrolloff' window lines below the cursor. If not, need to | |
| 339 * scroll. */ | |
| 7 | 340 n = curwin->w_empty_rows; |
| 341 loff.lnum = curwin->w_cursor.lnum; | |
| 342 #ifdef FEAT_FOLDING | |
| 343 /* In a fold go to its last line. */ | |
| 344 (void)hasFolding(loff.lnum, NULL, &loff.lnum); | |
| 345 #endif | |
| 346 #ifdef FEAT_DIFF | |
| 347 loff.fill = 0; | |
| 348 n += curwin->w_filler_rows; | |
| 349 #endif | |
| 350 loff.height = 0; | |
| 351 while (loff.lnum < curwin->w_botline | |
| 352 #ifdef FEAT_DIFF | |
| 353 && (loff.lnum + 1 < curwin->w_botline || loff.fill == 0) | |
| 354 #endif | |
| 355 ) | |
| 356 { | |
| 357 n += loff.height; | |
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358 if (n >= *so_ptr) |
| 7 | 359 break; |
| 360 botline_forw(&loff); | |
| 361 } | |
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362 if (n >= *so_ptr) |
| 7 | 363 /* sufficient context, no need to scroll */ |
| 364 check_botline = FALSE; | |
| 1744 | 365 } |
| 366 else | |
| 367 /* sufficient context, no need to scroll */ | |
| 368 check_botline = FALSE; | |
| 7 | 369 } |
| 370 if (check_botline) | |
| 371 { | |
| 372 #ifdef FEAT_FOLDING | |
| 373 if (hasAnyFolding(curwin)) | |
| 374 { | |
| 375 /* Count the number of logical lines between the cursor and | |
|
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376 * botline - scrolloff (approximation of how much will be |
| 7 | 377 * scrolled). */ |
| 378 line_count = 0; | |
| 379 for (lnum = curwin->w_cursor.lnum; | |
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380 lnum >= curwin->w_botline - *so_ptr; --lnum) |
| 7 | 381 { |
| 382 ++line_count; | |
| 383 /* stop at end of file or when we know we are far off */ | |
| 384 if (lnum <= 0 || line_count > curwin->w_height + 1) | |
| 385 break; | |
| 386 (void)hasFolding(lnum, &lnum, NULL); | |
| 387 } | |
| 388 } | |
| 389 else | |
| 390 #endif | |
| 391 line_count = curwin->w_cursor.lnum - curwin->w_botline | |
|
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392 + 1 + *so_ptr; |
| 7 | 393 if (line_count <= curwin->w_height + 1) |
| 532 | 394 scroll_cursor_bot(scrolljump_value(), FALSE); |
| 7 | 395 else |
| 396 scroll_cursor_halfway(FALSE); | |
| 397 } | |
| 398 } | |
| 399 } | |
| 400 curwin->w_valid |= VALID_TOPLINE; | |
| 401 | |
| 402 /* | |
| 403 * Need to redraw when topline changed. | |
| 404 */ | |
| 405 if (curwin->w_topline != old_topline | |
| 406 #ifdef FEAT_DIFF | |
| 407 || curwin->w_topfill != old_topfill | |
| 408 #endif | |
| 409 ) | |
| 410 { | |
| 3318 | 411 dollar_vcol = -1; |
| 740 | 412 if (curwin->w_skipcol != 0) |
| 7 | 413 { |
| 414 curwin->w_skipcol = 0; | |
| 415 redraw_later(NOT_VALID); | |
| 416 } | |
| 417 else | |
| 418 redraw_later(VALID); | |
| 419 /* May need to set w_skipcol when cursor in w_topline. */ | |
| 420 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 421 validate_cursor(); | |
| 422 } | |
| 423 | |
| 424 #ifdef FEAT_MOUSE | |
|
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425 *so_ptr = save_so; |
| 7 | 426 #endif |
| 427 } | |
| 428 | |
| 429 /* | |
| 532 | 430 * Return the scrolljump value to use for the current window. |
| 431 * When 'scrolljump' is positive use it as-is. | |
| 432 * When 'scrolljump' is negative use it as a percentage of the window height. | |
| 433 */ | |
| 434 static int | |
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435 scrolljump_value(void) |
| 532 | 436 { |
| 437 if (p_sj >= 0) | |
| 438 return (int)p_sj; | |
| 439 return (curwin->w_height * -p_sj) / 100; | |
| 440 } | |
| 441 | |
| 442 /* | |
| 7 | 443 * Return TRUE when there are not 'scrolloff' lines above the cursor for the |
| 444 * current window. | |
| 445 */ | |
| 446 static int | |
|
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447 check_top_offset(void) |
| 7 | 448 { |
| 449 lineoff_T loff; | |
| 450 int n; | |
|
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451 long so = get_scrolloff_value(); |
| 7 | 452 |
|
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453 if (curwin->w_cursor.lnum < curwin->w_topline + so |
| 7 | 454 #ifdef FEAT_FOLDING |
| 455 || hasAnyFolding(curwin) | |
| 456 #endif | |
| 457 ) | |
| 458 { | |
| 459 loff.lnum = curwin->w_cursor.lnum; | |
| 460 #ifdef FEAT_DIFF | |
| 461 loff.fill = 0; | |
| 462 n = curwin->w_topfill; /* always have this context */ | |
| 463 #else | |
| 464 n = 0; | |
| 465 #endif | |
| 466 /* Count the visible screen lines above the cursor line. */ | |
|
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467 while (n < so) |
| 7 | 468 { |
| 469 topline_back(&loff); | |
| 470 /* Stop when included a line above the window. */ | |
| 471 if (loff.lnum < curwin->w_topline | |
| 472 #ifdef FEAT_DIFF | |
| 473 || (loff.lnum == curwin->w_topline && loff.fill > 0) | |
| 474 #endif | |
| 475 ) | |
| 476 break; | |
| 477 n += loff.height; | |
| 478 } | |
|
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479 if (n < so) |
| 7 | 480 return TRUE; |
| 481 } | |
| 482 return FALSE; | |
| 483 } | |
| 484 | |
| 485 void | |
|
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486 update_curswant(void) |
| 7 | 487 { |
| 488 if (curwin->w_set_curswant) | |
| 489 { | |
| 490 validate_virtcol(); | |
| 491 curwin->w_curswant = curwin->w_virtcol; | |
| 492 curwin->w_set_curswant = FALSE; | |
| 493 } | |
| 494 } | |
| 495 | |
| 496 /* | |
| 497 * Check if the cursor has moved. Set the w_valid flag accordingly. | |
| 498 */ | |
| 499 void | |
|
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500 check_cursor_moved(win_T *wp) |
| 7 | 501 { |
| 502 if (wp->w_cursor.lnum != wp->w_valid_cursor.lnum) | |
| 503 { | |
| 504 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 505 |VALID_CHEIGHT|VALID_CROW|VALID_TOPLINE); | |
| 506 wp->w_valid_cursor = wp->w_cursor; | |
| 507 wp->w_valid_leftcol = wp->w_leftcol; | |
| 508 } | |
| 509 else if (wp->w_cursor.col != wp->w_valid_cursor.col | |
| 510 || wp->w_leftcol != wp->w_valid_leftcol | |
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511 || wp->w_cursor.coladd != wp->w_valid_cursor.coladd) |
| 7 | 512 { |
| 513 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL); | |
| 514 wp->w_valid_cursor.col = wp->w_cursor.col; | |
| 515 wp->w_valid_leftcol = wp->w_leftcol; | |
| 516 wp->w_valid_cursor.coladd = wp->w_cursor.coladd; | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 /* | |
| 521 * Call this function when some window settings have changed, which require | |
| 522 * the cursor position, botline and topline to be recomputed and the window to | |
| 523 * be redrawn. E.g, when changing the 'wrap' option or folding. | |
| 524 */ | |
| 525 void | |
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526 changed_window_setting(void) |
| 7 | 527 { |
| 528 changed_window_setting_win(curwin); | |
| 529 } | |
| 530 | |
| 531 void | |
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532 changed_window_setting_win(win_T *wp) |
| 7 | 533 { |
| 534 wp->w_lines_valid = 0; | |
| 535 changed_line_abv_curs_win(wp); | |
| 536 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP|VALID_TOPLINE); | |
| 537 redraw_win_later(wp, NOT_VALID); | |
| 538 } | |
| 539 | |
| 540 /* | |
| 541 * Set wp->w_topline to a certain number. | |
| 542 */ | |
| 543 void | |
|
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544 set_topline(win_T *wp, linenr_T lnum) |
| 7 | 545 { |
| 546 #ifdef FEAT_FOLDING | |
| 547 /* go to first of folded lines */ | |
| 548 (void)hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL); | |
| 549 #endif | |
| 550 /* Approximate the value of w_botline */ | |
| 551 wp->w_botline += lnum - wp->w_topline; | |
| 552 wp->w_topline = lnum; | |
| 1744 | 553 wp->w_topline_was_set = TRUE; |
| 7 | 554 #ifdef FEAT_DIFF |
| 555 wp->w_topfill = 0; | |
| 556 #endif | |
| 557 wp->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_TOPLINE); | |
| 558 /* Don't set VALID_TOPLINE here, 'scrolloff' needs to be checked. */ | |
| 559 redraw_later(VALID); | |
| 560 } | |
| 561 | |
| 562 /* | |
| 563 * Call this function when the length of the cursor line (in screen | |
| 564 * characters) has changed, and the change is before the cursor. | |
| 565 * Need to take care of w_botline separately! | |
| 566 */ | |
| 567 void | |
|
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568 changed_cline_bef_curs(void) |
| 7 | 569 { |
| 570 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 571 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 572 } | |
| 573 | |
| 574 void | |
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575 changed_cline_bef_curs_win(win_T *wp) |
| 7 | 576 { |
| 577 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 578 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 579 } | |
| 580 | |
| 581 /* | |
| 582 * Call this function when the length of a line (in screen characters) above | |
| 583 * the cursor have changed. | |
| 584 * Need to take care of w_botline separately! | |
| 585 */ | |
| 586 void | |
|
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587 changed_line_abv_curs(void) |
| 7 | 588 { |
| 589 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW | |
| 590 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 591 } | |
| 592 | |
| 593 void | |
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594 changed_line_abv_curs_win(win_T *wp) |
| 7 | 595 { |
| 596 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW | |
| 597 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 598 } | |
| 599 | |
| 600 /* | |
| 601 * Make sure the value of curwin->w_botline is valid. | |
| 602 */ | |
| 603 void | |
|
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604 validate_botline(void) |
| 7 | 605 { |
| 606 if (!(curwin->w_valid & VALID_BOTLINE)) | |
| 607 comp_botline(curwin); | |
| 608 } | |
| 609 | |
| 610 /* | |
| 611 * Mark curwin->w_botline as invalid (because of some change in the buffer). | |
| 612 */ | |
| 613 void | |
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614 invalidate_botline(void) |
| 7 | 615 { |
| 616 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 617 } | |
| 618 | |
| 619 void | |
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620 invalidate_botline_win(win_T *wp) |
| 7 | 621 { |
| 622 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 623 } | |
| 624 | |
| 625 void | |
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626 approximate_botline_win( |
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627 win_T *wp) |
| 7 | 628 { |
| 629 wp->w_valid &= ~VALID_BOTLINE; | |
| 630 } | |
| 631 | |
| 632 /* | |
| 633 * Return TRUE if curwin->w_wrow and curwin->w_wcol are valid. | |
| 634 */ | |
| 635 int | |
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636 cursor_valid(void) |
| 7 | 637 { |
| 638 check_cursor_moved(curwin); | |
| 639 return ((curwin->w_valid & (VALID_WROW|VALID_WCOL)) == | |
| 640 (VALID_WROW|VALID_WCOL)); | |
| 641 } | |
| 642 | |
| 643 /* | |
| 644 * Validate cursor position. Makes sure w_wrow and w_wcol are valid. | |
| 645 * w_topline must be valid, you may need to call update_topline() first! | |
| 646 */ | |
| 647 void | |
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648 validate_cursor(void) |
| 7 | 649 { |
| 650 check_cursor_moved(curwin); | |
| 651 if ((curwin->w_valid & (VALID_WCOL|VALID_WROW)) != (VALID_WCOL|VALID_WROW)) | |
| 652 curs_columns(TRUE); | |
| 653 } | |
| 654 | |
| 655 #if defined(FEAT_GUI) || defined(PROTO) | |
| 656 /* | |
| 657 * validate w_cline_row. | |
| 658 */ | |
| 659 void | |
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660 validate_cline_row(void) |
| 7 | 661 { |
| 662 /* | |
| 663 * First make sure that w_topline is valid (after moving the cursor). | |
| 664 */ | |
| 665 update_topline(); | |
| 666 check_cursor_moved(curwin); | |
| 667 if (!(curwin->w_valid & VALID_CROW)) | |
| 6441 | 668 curs_rows(curwin); |
| 7 | 669 } |
| 670 #endif | |
| 671 | |
| 672 /* | |
| 673 * Compute wp->w_cline_row and wp->w_cline_height, based on the current value | |
|
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674 * of wp->w_topline. |
| 7 | 675 */ |
| 676 static void | |
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677 curs_rows(win_T *wp) |
| 7 | 678 { |
| 679 linenr_T lnum; | |
| 680 int i; | |
| 681 int all_invalid; | |
| 682 int valid; | |
| 683 #ifdef FEAT_FOLDING | |
| 684 long fold_count; | |
| 685 #endif | |
| 686 | |
| 687 /* Check if wp->w_lines[].wl_size is invalid */ | |
| 688 all_invalid = (!redrawing() | |
| 689 || wp->w_lines_valid == 0 | |
| 690 || wp->w_lines[0].wl_lnum > wp->w_topline); | |
| 691 i = 0; | |
| 692 wp->w_cline_row = 0; | |
| 693 for (lnum = wp->w_topline; lnum < wp->w_cursor.lnum; ++i) | |
| 694 { | |
| 695 valid = FALSE; | |
| 696 if (!all_invalid && i < wp->w_lines_valid) | |
| 697 { | |
| 698 if (wp->w_lines[i].wl_lnum < lnum || !wp->w_lines[i].wl_valid) | |
| 699 continue; /* skip changed or deleted lines */ | |
| 700 if (wp->w_lines[i].wl_lnum == lnum) | |
| 701 { | |
| 702 #ifdef FEAT_FOLDING | |
| 703 /* Check for newly inserted lines below this row, in which | |
| 704 * case we need to check for folded lines. */ | |
| 705 if (!wp->w_buffer->b_mod_set | |
| 706 || wp->w_lines[i].wl_lastlnum < wp->w_cursor.lnum | |
| 707 || wp->w_buffer->b_mod_top | |
| 708 > wp->w_lines[i].wl_lastlnum + 1) | |
| 709 #endif | |
| 710 valid = TRUE; | |
| 711 } | |
| 712 else if (wp->w_lines[i].wl_lnum > lnum) | |
| 713 --i; /* hold at inserted lines */ | |
| 714 } | |
| 715 if (valid | |
| 716 #ifdef FEAT_DIFF | |
| 717 && (lnum != wp->w_topline || !wp->w_p_diff) | |
| 718 #endif | |
| 719 ) | |
| 720 { | |
| 721 #ifdef FEAT_FOLDING | |
| 722 lnum = wp->w_lines[i].wl_lastlnum + 1; | |
| 723 /* Cursor inside folded lines, don't count this row */ | |
| 724 if (lnum > wp->w_cursor.lnum) | |
| 725 break; | |
| 726 #else | |
| 727 ++lnum; | |
| 728 #endif | |
| 729 wp->w_cline_row += wp->w_lines[i].wl_size; | |
| 730 } | |
| 731 else | |
| 732 { | |
| 733 #ifdef FEAT_FOLDING | |
| 734 fold_count = foldedCount(wp, lnum, NULL); | |
| 735 if (fold_count) | |
| 736 { | |
| 737 lnum += fold_count; | |
| 738 if (lnum > wp->w_cursor.lnum) | |
| 739 break; | |
| 740 ++wp->w_cline_row; | |
| 741 } | |
| 742 else | |
| 743 #endif | |
| 744 #ifdef FEAT_DIFF | |
| 745 if (lnum == wp->w_topline) | |
| 746 wp->w_cline_row += plines_win_nofill(wp, lnum++, TRUE) | |
| 747 + wp->w_topfill; | |
| 748 else | |
| 749 #endif | |
| 750 wp->w_cline_row += plines_win(wp, lnum++, TRUE); | |
| 751 } | |
| 752 } | |
| 753 | |
| 754 check_cursor_moved(wp); | |
| 755 if (!(wp->w_valid & VALID_CHEIGHT)) | |
| 756 { | |
| 757 if (all_invalid | |
| 758 || i == wp->w_lines_valid | |
| 759 || (i < wp->w_lines_valid | |
| 760 && (!wp->w_lines[i].wl_valid | |
| 761 || wp->w_lines[i].wl_lnum != wp->w_cursor.lnum))) | |
| 762 { | |
| 763 #ifdef FEAT_DIFF | |
| 764 if (wp->w_cursor.lnum == wp->w_topline) | |
| 765 wp->w_cline_height = plines_win_nofill(wp, wp->w_cursor.lnum, | |
| 766 TRUE) + wp->w_topfill; | |
| 767 else | |
| 768 #endif | |
| 769 wp->w_cline_height = plines_win(wp, wp->w_cursor.lnum, TRUE); | |
| 770 #ifdef FEAT_FOLDING | |
| 771 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum, | |
| 772 NULL, NULL, TRUE, NULL); | |
| 773 #endif | |
| 774 } | |
| 775 else if (i > wp->w_lines_valid) | |
| 776 { | |
| 777 /* a line that is too long to fit on the last screen line */ | |
| 778 wp->w_cline_height = 0; | |
| 779 #ifdef FEAT_FOLDING | |
| 780 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum, | |
| 781 NULL, NULL, TRUE, NULL); | |
| 782 #endif | |
| 783 } | |
| 784 else | |
| 785 { | |
| 786 wp->w_cline_height = wp->w_lines[i].wl_size; | |
| 787 #ifdef FEAT_FOLDING | |
| 788 wp->w_cline_folded = wp->w_lines[i].wl_folded; | |
| 789 #endif | |
| 790 } | |
| 791 } | |
| 792 | |
| 5764 | 793 redraw_for_cursorline(curwin); |
| 7 | 794 wp->w_valid |= VALID_CROW|VALID_CHEIGHT; |
| 795 | |
| 796 } | |
| 797 | |
| 798 /* | |
| 799 * Validate curwin->w_virtcol only. | |
| 800 */ | |
| 801 void | |
|
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802 validate_virtcol(void) |
| 7 | 803 { |
| 804 validate_virtcol_win(curwin); | |
| 805 } | |
| 806 | |
| 807 /* | |
| 808 * Validate wp->w_virtcol only. | |
| 809 */ | |
| 810 void | |
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811 validate_virtcol_win(win_T *wp) |
| 7 | 812 { |
| 813 check_cursor_moved(wp); | |
| 814 if (!(wp->w_valid & VALID_VIRTCOL)) | |
| 815 { | |
| 816 getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL); | |
| 817 wp->w_valid |= VALID_VIRTCOL; | |
| 740 | 818 #ifdef FEAT_SYN_HL |
| 752 | 819 if (wp->w_p_cuc |
| 820 # ifdef FEAT_INS_EXPAND | |
| 821 && !pum_visible() | |
| 822 # endif | |
| 823 ) | |
| 740 | 824 redraw_win_later(wp, SOME_VALID); |
| 825 #endif | |
| 7 | 826 } |
| 827 } | |
| 828 | |
| 829 /* | |
| 830 * Validate curwin->w_cline_height only. | |
| 831 */ | |
| 832 static void | |
|
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833 validate_cheight(void) |
| 7 | 834 { |
| 835 check_cursor_moved(curwin); | |
| 836 if (!(curwin->w_valid & VALID_CHEIGHT)) | |
| 837 { | |
| 838 #ifdef FEAT_DIFF | |
| 839 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 840 curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum) | |
| 841 + curwin->w_topfill; | |
| 842 else | |
| 843 #endif | |
| 844 curwin->w_cline_height = plines(curwin->w_cursor.lnum); | |
| 845 #ifdef FEAT_FOLDING | |
| 846 curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL); | |
| 847 #endif | |
| 848 curwin->w_valid |= VALID_CHEIGHT; | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 /* | |
| 1668 | 853 * Validate w_wcol and w_virtcol only. |
| 7 | 854 */ |
| 855 void | |
|
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856 validate_cursor_col(void) |
| 7 | 857 { |
| 858 colnr_T off; | |
| 859 colnr_T col; | |
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860 int width; |
| 7 | 861 |
| 862 validate_virtcol(); | |
| 863 if (!(curwin->w_valid & VALID_WCOL)) | |
| 864 { | |
| 865 col = curwin->w_virtcol; | |
| 866 off = curwin_col_off(); | |
| 867 col += off; | |
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868 width = curwin->w_width - off + curwin_col_off2(); |
| 7 | 869 |
| 870 /* long line wrapping, adjust curwin->w_wrow */ | |
| 1668 | 871 if (curwin->w_p_wrap |
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872 && col >= (colnr_T)curwin->w_width |
|
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873 && width > 0) |
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874 /* use same formula as what is used in curs_columns() */ |
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875 col -= ((col - curwin->w_width) / width + 1) * width; |
| 1668 | 876 if (col > (int)curwin->w_leftcol) |
| 877 col -= curwin->w_leftcol; | |
| 878 else | |
| 879 col = 0; | |
| 7 | 880 curwin->w_wcol = col; |
| 1668 | 881 |
| 7 | 882 curwin->w_valid |= VALID_WCOL; |
| 883 } | |
| 884 } | |
| 885 | |
| 886 /* | |
|
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887 * Compute offset of a window, occupied by absolute or relative line number, |
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888 * fold column and sign column (these don't move when scrolling horizontally). |
| 7 | 889 */ |
| 890 int | |
|
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891 win_col_off(win_T *wp) |
| 7 | 892 { |
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893 return (((wp->w_p_nu || wp->w_p_rnu) ? number_width(wp) + 1 : 0) |
| 7 | 894 #ifdef FEAT_CMDWIN |
| 895 + (cmdwin_type == 0 || wp != curwin ? 0 : 1) | |
| 896 #endif | |
| 897 #ifdef FEAT_FOLDING | |
| 898 + wp->w_p_fdc | |
| 899 #endif | |
| 900 #ifdef FEAT_SIGNS | |
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901 + (signcolumn_on(wp) ? 2 : 0) |
| 7 | 902 #endif |
| 903 ); | |
| 904 } | |
| 905 | |
| 906 int | |
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907 curwin_col_off(void) |
| 7 | 908 { |
| 909 return win_col_off(curwin); | |
| 910 } | |
| 911 | |
| 912 /* | |
| 913 * Return the difference in column offset for the second screen line of a | |
|
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914 * wrapped line. It's 8 if 'number' or 'relativenumber' is on and 'n' is in |
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915 * 'cpoptions'. |
| 7 | 916 */ |
| 917 int | |
|
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918 win_col_off2(win_T *wp) |
| 7 | 919 { |
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920 if ((wp->w_p_nu || wp->w_p_rnu) && vim_strchr(p_cpo, CPO_NUMCOL) != NULL) |
| 13 | 921 return number_width(wp) + 1; |
| 7 | 922 return 0; |
| 923 } | |
| 924 | |
| 925 int | |
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926 curwin_col_off2(void) |
| 7 | 927 { |
| 928 return win_col_off2(curwin); | |
| 929 } | |
| 930 | |
| 931 /* | |
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932 * Compute curwin->w_wcol and curwin->w_virtcol. |
| 7 | 933 * Also updates curwin->w_wrow and curwin->w_cline_row. |
| 934 * Also updates curwin->w_leftcol. | |
| 935 */ | |
| 936 void | |
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937 curs_columns( |
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938 int may_scroll) /* when TRUE, may scroll horizontally */ |
| 7 | 939 { |
| 940 int diff; | |
| 941 int extra; /* offset for first screen line */ | |
| 942 int off_left, off_right; | |
| 943 int n; | |
| 944 int p_lines; | |
| 945 int width = 0; | |
| 946 int textwidth; | |
| 947 int new_leftcol; | |
| 948 colnr_T startcol; | |
| 949 colnr_T endcol; | |
| 950 colnr_T prev_skipcol; | |
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951 long so = get_scrolloff_value(); |
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952 long siso = get_sidescrolloff_value(); |
| 7 | 953 |
| 954 /* | |
| 955 * First make sure that w_topline is valid (after moving the cursor). | |
| 956 */ | |
| 957 update_topline(); | |
| 958 | |
| 959 /* | |
| 960 * Next make sure that w_cline_row is valid. | |
| 961 */ | |
| 962 if (!(curwin->w_valid & VALID_CROW)) | |
| 6441 | 963 curs_rows(curwin); |
| 7 | 964 |
| 965 /* | |
| 966 * Compute the number of virtual columns. | |
| 967 */ | |
| 968 #ifdef FEAT_FOLDING | |
| 969 if (curwin->w_cline_folded) | |
| 970 /* In a folded line the cursor is always in the first column */ | |
| 971 startcol = curwin->w_virtcol = endcol = curwin->w_leftcol; | |
| 972 else | |
| 973 #endif | |
| 974 getvvcol(curwin, &curwin->w_cursor, | |
| 975 &startcol, &(curwin->w_virtcol), &endcol); | |
| 976 | |
| 977 /* remove '$' from change command when cursor moves onto it */ | |
| 978 if (startcol > dollar_vcol) | |
| 3318 | 979 dollar_vcol = -1; |
| 7 | 980 |
| 981 extra = curwin_col_off(); | |
| 982 curwin->w_wcol = curwin->w_virtcol + extra; | |
| 983 endcol += extra; | |
| 984 | |
| 985 /* | |
| 986 * Now compute w_wrow, counting screen lines from w_cline_row. | |
| 987 */ | |
| 988 curwin->w_wrow = curwin->w_cline_row; | |
| 989 | |
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990 textwidth = curwin->w_width - extra; |
| 7 | 991 if (textwidth <= 0) |
| 992 { | |
| 993 /* No room for text, put cursor in last char of window. */ | |
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994 curwin->w_wcol = curwin->w_width - 1; |
| 7 | 995 curwin->w_wrow = curwin->w_height - 1; |
| 996 } | |
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997 else if (curwin->w_p_wrap && curwin->w_width != 0) |
| 7 | 998 { |
| 999 width = textwidth + curwin_col_off2(); | |
| 1000 | |
| 1001 /* long line wrapping, adjust curwin->w_wrow */ | |
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1002 if (curwin->w_wcol >= curwin->w_width) |
| 7 | 1003 { |
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1004 /* this same formula is used in validate_cursor_col() */ |
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1005 n = (curwin->w_wcol - curwin->w_width) / width + 1; |
| 7 | 1006 curwin->w_wcol -= n * width; |
| 1007 curwin->w_wrow += n; | |
| 1008 | |
| 1009 #ifdef FEAT_LINEBREAK | |
| 1010 /* When cursor wraps to first char of next line in Insert | |
| 1011 * mode, the 'showbreak' string isn't shown, backup to first | |
| 1012 * column */ | |
| 1013 if (*p_sbr && *ml_get_cursor() == NUL | |
| 1014 && curwin->w_wcol == (int)vim_strsize(p_sbr)) | |
| 1015 curwin->w_wcol = 0; | |
| 1016 #endif | |
| 1017 } | |
| 1018 } | |
| 1019 | |
| 1020 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line | |
| 1021 * is not folded. | |
| 1022 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */ | |
| 3263 | 1023 else if (may_scroll |
| 7 | 1024 #ifdef FEAT_FOLDING |
| 1025 && !curwin->w_cline_folded | |
| 1026 #endif | |
| 1027 ) | |
| 1028 { | |
| 1029 /* | |
| 1030 * If Cursor is left of the screen, scroll rightwards. | |
| 1031 * If Cursor is right of the screen, scroll leftwards | |
| 1032 * If we get closer to the edge than 'sidescrolloff', scroll a little | |
| 1033 * extra | |
| 1034 */ | |
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1035 off_left = (int)startcol - (int)curwin->w_leftcol - siso; |
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1036 off_right = (int)endcol - (int)(curwin->w_leftcol + curwin->w_width |
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1037 - siso) + 1; |
| 7 | 1038 if (off_left < 0 || off_right > 0) |
| 1039 { | |
| 1040 if (off_left < 0) | |
| 1041 diff = -off_left; | |
| 1042 else | |
| 1043 diff = off_right; | |
| 1044 | |
| 1045 /* When far off or not enough room on either side, put cursor in | |
| 1046 * middle of window. */ | |
| 1047 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left) | |
| 1048 new_leftcol = curwin->w_wcol - extra - textwidth / 2; | |
| 1049 else | |
| 1050 { | |
| 1051 if (diff < p_ss) | |
| 1052 diff = p_ss; | |
| 1053 if (off_left < 0) | |
| 1054 new_leftcol = curwin->w_leftcol - diff; | |
| 1055 else | |
| 1056 new_leftcol = curwin->w_leftcol + diff; | |
| 1057 } | |
| 1058 if (new_leftcol < 0) | |
| 1059 new_leftcol = 0; | |
| 1060 if (new_leftcol != (int)curwin->w_leftcol) | |
| 1061 { | |
| 1062 curwin->w_leftcol = new_leftcol; | |
| 1063 /* screen has to be redrawn with new curwin->w_leftcol */ | |
| 1064 redraw_later(NOT_VALID); | |
| 1065 } | |
| 1066 } | |
| 1067 curwin->w_wcol -= curwin->w_leftcol; | |
| 1068 } | |
| 1069 else if (curwin->w_wcol > (int)curwin->w_leftcol) | |
| 1070 curwin->w_wcol -= curwin->w_leftcol; | |
| 1071 else | |
| 1072 curwin->w_wcol = 0; | |
| 1073 | |
| 1074 #ifdef FEAT_DIFF | |
| 1075 /* Skip over filler lines. At the top use w_topfill, there | |
| 1076 * may be some filler lines above the window. */ | |
| 1077 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 1078 curwin->w_wrow += curwin->w_topfill; | |
| 1079 else | |
| 1080 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum); | |
| 1081 #endif | |
| 1082 | |
| 1083 prev_skipcol = curwin->w_skipcol; | |
| 1084 | |
| 1085 p_lines = 0; | |
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|
1086 |
| 7 | 1087 if ((curwin->w_wrow >= curwin->w_height |
| 1088 || ((prev_skipcol > 0 | |
|
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1089 || curwin->w_wrow + so >= curwin->w_height) |
| 7 | 1090 && (p_lines = |
| 1091 #ifdef FEAT_DIFF | |
| 1092 plines_win_nofill | |
| 1093 #else | |
| 1094 plines_win | |
| 1095 #endif | |
| 1096 (curwin, curwin->w_cursor.lnum, FALSE)) | |
| 1097 - 1 >= curwin->w_height)) | |
| 1098 && curwin->w_height != 0 | |
| 1099 && curwin->w_cursor.lnum == curwin->w_topline | |
| 1100 && width > 0 | |
|
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1101 && curwin->w_width != 0) |
| 7 | 1102 { |
| 1103 /* Cursor past end of screen. Happens with a single line that does | |
| 1104 * not fit on screen. Find a skipcol to show the text around the | |
| 1105 * cursor. Avoid scrolling all the time. compute value of "extra": | |
|
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1106 * 1: Less than 'scrolloff' lines above |
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1107 * 2: Less than 'scrolloff' lines below |
| 7 | 1108 * 3: both of them */ |
| 1109 extra = 0; | |
|
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1110 if (curwin->w_skipcol + so * width > curwin->w_virtcol) |
| 7 | 1111 extra = 1; |
| 1112 /* Compute last display line of the buffer line that we want at the | |
| 1113 * bottom of the window. */ | |
| 1114 if (p_lines == 0) | |
| 1115 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE); | |
| 1116 --p_lines; | |
|
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1117 if (p_lines > curwin->w_wrow + so) |
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|
1118 n = curwin->w_wrow + so; |
| 7 | 1119 else |
| 1120 n = p_lines; | |
| 1121 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width) | |
| 1122 extra += 2; | |
| 1123 | |
|
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|
1124 if (extra == 3 || p_lines < so * 2) |
| 7 | 1125 { |
| 1126 /* not enough room for 'scrolloff', put cursor in the middle */ | |
| 1127 n = curwin->w_virtcol / width; | |
| 1128 if (n > curwin->w_height / 2) | |
| 1129 n -= curwin->w_height / 2; | |
| 1130 else | |
| 1131 n = 0; | |
| 1132 /* don't skip more than necessary */ | |
| 1133 if (n > p_lines - curwin->w_height + 1) | |
| 1134 n = p_lines - curwin->w_height + 1; | |
| 1135 curwin->w_skipcol = n * width; | |
| 1136 } | |
| 1137 else if (extra == 1) | |
| 1138 { | |
| 1139 /* less then 'scrolloff' lines above, decrease skipcol */ | |
|
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|
1140 extra = (curwin->w_skipcol + so * width - curwin->w_virtcol |
| 7 | 1141 + width - 1) / width; |
| 1142 if (extra > 0) | |
| 1143 { | |
| 1144 if ((colnr_T)(extra * width) > curwin->w_skipcol) | |
| 1145 extra = curwin->w_skipcol / width; | |
| 1146 curwin->w_skipcol -= extra * width; | |
| 1147 } | |
| 1148 } | |
| 1149 else if (extra == 2) | |
| 1150 { | |
| 1151 /* less then 'scrolloff' lines below, increase skipcol */ | |
| 1152 endcol = (n - curwin->w_height + 1) * width; | |
| 1153 while (endcol > curwin->w_virtcol) | |
| 1154 endcol -= width; | |
| 1155 if (endcol > curwin->w_skipcol) | |
| 1156 curwin->w_skipcol = endcol; | |
| 1157 } | |
| 1158 | |
| 1159 curwin->w_wrow -= curwin->w_skipcol / width; | |
| 1160 if (curwin->w_wrow >= curwin->w_height) | |
| 1161 { | |
| 1162 /* small window, make sure cursor is in it */ | |
| 1163 extra = curwin->w_wrow - curwin->w_height + 1; | |
| 1164 curwin->w_skipcol += extra * width; | |
| 1165 curwin->w_wrow -= extra; | |
| 1166 } | |
| 1167 | |
| 1168 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width; | |
| 1169 if (extra > 0) | |
| 1170 win_ins_lines(curwin, 0, extra, FALSE, FALSE); | |
| 1171 else if (extra < 0) | |
|
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1172 win_del_lines(curwin, 0, -extra, FALSE, FALSE, 0); |
| 7 | 1173 } |
| 1174 else | |
| 1175 curwin->w_skipcol = 0; | |
| 1176 if (prev_skipcol != curwin->w_skipcol) | |
| 1177 redraw_later(NOT_VALID); | |
| 1178 | |
| 740 | 1179 #ifdef FEAT_SYN_HL |
| 5749 | 1180 /* Redraw when w_virtcol changes and 'cursorcolumn' is set */ |
| 1181 if (curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0 | |
| 1182 # ifdef FEAT_INS_EXPAND | |
| 1183 && !pum_visible() | |
| 1184 # endif | |
| 1185 ) | |
| 1186 redraw_later(SOME_VALID); | |
|
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1187 #endif |
| 740 | 1188 |
| 7 | 1189 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL; |
| 1190 } | |
| 1191 | |
| 1192 /* | |
| 1193 * Scroll the current window down by "line_count" logical lines. "CTRL-Y" | |
| 1194 */ | |
| 1195 void | |
|
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1196 scrolldown( |
|
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1197 long line_count, |
|
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|
1198 int byfold UNUSED) /* TRUE: count a closed fold as one line */ |
| 7 | 1199 { |
| 1200 long done = 0; /* total # of physical lines done */ | |
| 1201 int wrow; | |
| 1202 int moved = FALSE; | |
| 1203 | |
| 1204 #ifdef FEAT_FOLDING | |
| 1205 linenr_T first; | |
| 1206 | |
| 1207 /* Make sure w_topline is at the first of a sequence of folded lines. */ | |
| 1208 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1209 #endif | |
| 1210 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1211 while (line_count-- > 0) | |
| 1212 { | |
| 1213 #ifdef FEAT_DIFF | |
| 1980 | 1214 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline) |
| 1215 && curwin->w_topfill < curwin->w_height - 1) | |
| 7 | 1216 { |
| 1217 ++curwin->w_topfill; | |
| 1218 ++done; | |
| 1219 } | |
| 1220 else | |
| 1221 #endif | |
| 1222 { | |
| 1223 if (curwin->w_topline == 1) | |
| 1224 break; | |
| 1225 --curwin->w_topline; | |
| 1226 #ifdef FEAT_DIFF | |
| 1227 curwin->w_topfill = 0; | |
| 1228 #endif | |
| 1229 #ifdef FEAT_FOLDING | |
| 1230 /* A sequence of folded lines only counts for one logical line */ | |
| 1231 if (hasFolding(curwin->w_topline, &first, NULL)) | |
| 1232 { | |
| 1233 ++done; | |
| 1234 if (!byfold) | |
| 1235 line_count -= curwin->w_topline - first - 1; | |
| 1236 curwin->w_botline -= curwin->w_topline - first; | |
| 1237 curwin->w_topline = first; | |
| 1238 } | |
| 1239 else | |
| 1240 #endif | |
|
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1241 done += PLINES_NOFILL(curwin->w_topline); |
| 7 | 1242 } |
| 1243 --curwin->w_botline; /* approximate w_botline */ | |
| 1244 invalidate_botline(); | |
| 1245 } | |
| 1246 curwin->w_wrow += done; /* keep w_wrow updated */ | |
| 1247 curwin->w_cline_row += done; /* keep w_cline_row updated */ | |
| 1248 | |
| 1249 #ifdef FEAT_DIFF | |
| 1250 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 1251 curwin->w_cline_row = 0; | |
| 1252 check_topfill(curwin, TRUE); | |
| 1253 #endif | |
| 1254 | |
| 1255 /* | |
| 1256 * Compute the row number of the last row of the cursor line | |
| 1257 * and move the cursor onto the displayed part of the window. | |
| 1258 */ | |
| 1259 wrow = curwin->w_wrow; | |
|
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1260 if (curwin->w_p_wrap && curwin->w_width != 0) |
| 7 | 1261 { |
| 1262 validate_virtcol(); | |
| 1263 validate_cheight(); | |
| 1264 wrow += curwin->w_cline_height - 1 - | |
|
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1265 curwin->w_virtcol / curwin->w_width; |
| 7 | 1266 } |
| 1267 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1) | |
| 1268 { | |
| 1269 #ifdef FEAT_FOLDING | |
| 1270 if (hasFolding(curwin->w_cursor.lnum, &first, NULL)) | |
| 1271 { | |
| 1272 --wrow; | |
| 1273 if (first == 1) | |
| 1274 curwin->w_cursor.lnum = 1; | |
| 1275 else | |
| 1276 curwin->w_cursor.lnum = first - 1; | |
| 1277 } | |
| 1278 else | |
| 1279 #endif | |
| 1280 wrow -= plines(curwin->w_cursor.lnum--); | |
| 1281 curwin->w_valid &= | |
| 1282 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL); | |
| 1283 moved = TRUE; | |
| 1284 } | |
| 1285 if (moved) | |
| 1286 { | |
| 1287 #ifdef FEAT_FOLDING | |
| 1288 /* Move cursor to first line of closed fold. */ | |
| 1289 foldAdjustCursor(); | |
| 1290 #endif | |
| 1291 coladvance(curwin->w_curswant); | |
| 1292 } | |
| 1293 } | |
| 1294 | |
| 1295 /* | |
| 1296 * Scroll the current window up by "line_count" logical lines. "CTRL-E" | |
| 1297 */ | |
| 1298 void | |
|
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1299 scrollup( |
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2a8d6b2dd925
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|
1300 long line_count, |
|
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|
1301 int byfold UNUSED) /* TRUE: count a closed fold as one line */ |
| 7 | 1302 { |
| 1303 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF) | |
| 1304 linenr_T lnum; | |
| 1305 | |
| 1306 if ( | |
| 1307 # ifdef FEAT_FOLDING | |
| 1308 (byfold && hasAnyFolding(curwin)) | |
| 1309 # ifdef FEAT_DIFF | |
| 1310 || | |
| 1311 # endif | |
| 1312 # endif | |
| 1313 # ifdef FEAT_DIFF | |
| 1314 curwin->w_p_diff | |
| 1315 # endif | |
| 1316 ) | |
| 1317 { | |
| 1318 /* count each sequence of folded lines as one logical line */ | |
| 1319 lnum = curwin->w_topline; | |
| 1320 while (line_count--) | |
| 1321 { | |
| 1322 # ifdef FEAT_DIFF | |
| 1323 if (curwin->w_topfill > 0) | |
| 1324 --curwin->w_topfill; | |
| 1325 else | |
| 1326 # endif | |
| 1327 { | |
| 1328 # ifdef FEAT_FOLDING | |
| 1329 if (byfold) | |
| 1330 (void)hasFolding(lnum, NULL, &lnum); | |
| 1331 # endif | |
| 1332 if (lnum >= curbuf->b_ml.ml_line_count) | |
| 1333 break; | |
| 1334 ++lnum; | |
| 1335 # ifdef FEAT_DIFF | |
| 1336 curwin->w_topfill = diff_check_fill(curwin, lnum); | |
| 1337 # endif | |
| 1338 } | |
| 1339 } | |
| 1340 /* approximate w_botline */ | |
| 1341 curwin->w_botline += lnum - curwin->w_topline; | |
| 1342 curwin->w_topline = lnum; | |
| 1343 } | |
| 1344 else | |
| 1345 #endif | |
| 1346 { | |
| 1347 curwin->w_topline += line_count; | |
| 1348 curwin->w_botline += line_count; /* approximate w_botline */ | |
| 1349 } | |
| 1350 | |
| 1351 if (curwin->w_topline > curbuf->b_ml.ml_line_count) | |
| 1352 curwin->w_topline = curbuf->b_ml.ml_line_count; | |
| 1353 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1) | |
| 1354 curwin->w_botline = curbuf->b_ml.ml_line_count + 1; | |
| 1355 | |
| 1356 #ifdef FEAT_DIFF | |
| 1357 check_topfill(curwin, FALSE); | |
| 1358 #endif | |
| 1359 | |
| 1360 #ifdef FEAT_FOLDING | |
| 1361 if (hasAnyFolding(curwin)) | |
| 1362 /* Make sure w_topline is at the first of a sequence of folded lines. */ | |
| 1363 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1364 #endif | |
| 1365 | |
| 1366 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1367 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 1368 { | |
| 1369 curwin->w_cursor.lnum = curwin->w_topline; | |
| 1370 curwin->w_valid &= | |
| 1371 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL); | |
| 1372 coladvance(curwin->w_curswant); | |
| 1373 } | |
| 1374 } | |
| 1375 | |
| 1376 #ifdef FEAT_DIFF | |
| 1377 /* | |
| 1378 * Don't end up with too many filler lines in the window. | |
| 1379 */ | |
| 1380 void | |
|
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1381 check_topfill( |
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|
1382 win_T *wp, |
|
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|
1383 int down) /* when TRUE scroll down when not enough space */ |
| 7 | 1384 { |
| 1385 int n; | |
| 1386 | |
| 1387 if (wp->w_topfill > 0) | |
| 1388 { | |
| 1389 n = plines_win_nofill(wp, wp->w_topline, TRUE); | |
| 1390 if (wp->w_topfill + n > wp->w_height) | |
| 1391 { | |
| 1392 if (down && wp->w_topline > 1) | |
| 1393 { | |
| 1394 --wp->w_topline; | |
| 1395 wp->w_topfill = 0; | |
| 1396 } | |
| 1397 else | |
| 1398 { | |
| 1399 wp->w_topfill = wp->w_height - n; | |
| 1400 if (wp->w_topfill < 0) | |
| 1401 wp->w_topfill = 0; | |
| 1402 } | |
| 1403 } | |
| 1404 } | |
| 1405 } | |
| 1406 | |
| 1407 /* | |
| 1408 * Use as many filler lines as possible for w_topline. Make sure w_topline | |
| 1409 * is still visible. | |
| 1410 */ | |
| 1411 static void | |
|
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1412 max_topfill(void) |
| 7 | 1413 { |
| 1414 int n; | |
| 1415 | |
| 1416 n = plines_nofill(curwin->w_topline); | |
| 1417 if (n >= curwin->w_height) | |
| 1418 curwin->w_topfill = 0; | |
| 1419 else | |
| 1420 { | |
| 1421 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 1422 if (curwin->w_topfill + n > curwin->w_height) | |
| 1423 curwin->w_topfill = curwin->w_height - n; | |
| 1424 } | |
| 1425 } | |
| 1426 #endif | |
| 1427 | |
| 1428 #if defined(FEAT_INS_EXPAND) || defined(PROTO) | |
| 1429 /* | |
| 1430 * Scroll the screen one line down, but don't do it if it would move the | |
| 1431 * cursor off the screen. | |
| 1432 */ | |
| 1433 void | |
|
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|
1434 scrolldown_clamp(void) |
| 7 | 1435 { |
| 1436 int end_row; | |
| 1437 #ifdef FEAT_DIFF | |
| 1438 int can_fill = (curwin->w_topfill | |
| 1439 < diff_check_fill(curwin, curwin->w_topline)); | |
| 1440 #endif | |
| 1441 | |
| 1442 if (curwin->w_topline <= 1 | |
| 1443 #ifdef FEAT_DIFF | |
| 1444 && !can_fill | |
| 1445 #endif | |
| 1446 ) | |
| 1447 return; | |
| 1448 | |
| 1449 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1450 | |
| 1451 /* | |
| 1452 * Compute the row number of the last row of the cursor line | |
| 1453 * and make sure it doesn't go off the screen. Make sure the cursor | |
| 1454 * doesn't go past 'scrolloff' lines from the screen end. | |
| 1455 */ | |
| 1456 end_row = curwin->w_wrow; | |
| 1457 #ifdef FEAT_DIFF | |
| 1458 if (can_fill) | |
| 1459 ++end_row; | |
| 1460 else | |
| 1461 end_row += plines_nofill(curwin->w_topline - 1); | |
| 1462 #else | |
| 1463 end_row += plines(curwin->w_topline - 1); | |
| 1464 #endif | |
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1465 if (curwin->w_p_wrap && curwin->w_width != 0) |
| 7 | 1466 { |
| 1467 validate_cheight(); | |
| 1468 validate_virtcol(); | |
| 1469 end_row += curwin->w_cline_height - 1 - | |
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1470 curwin->w_virtcol / curwin->w_width; |
| 7 | 1471 } |
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1472 if (end_row < curwin->w_height - get_scrolloff_value()) |
| 7 | 1473 { |
| 1474 #ifdef FEAT_DIFF | |
| 1475 if (can_fill) | |
| 1476 { | |
| 1477 ++curwin->w_topfill; | |
| 1478 check_topfill(curwin, TRUE); | |
| 1479 } | |
| 1480 else | |
| 1481 { | |
| 1482 --curwin->w_topline; | |
| 1483 curwin->w_topfill = 0; | |
| 1484 } | |
| 1485 #else | |
| 1486 --curwin->w_topline; | |
| 1487 #endif | |
| 1488 #ifdef FEAT_FOLDING | |
| 7009 | 1489 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); |
| 7 | 1490 #endif |
| 1491 --curwin->w_botline; /* approximate w_botline */ | |
| 1492 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1493 } | |
| 1494 } | |
| 1495 | |
| 1496 /* | |
| 1497 * Scroll the screen one line up, but don't do it if it would move the cursor | |
| 1498 * off the screen. | |
| 1499 */ | |
| 1500 void | |
|
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changeset
|
1501 scrollup_clamp(void) |
| 7 | 1502 { |
| 1503 int start_row; | |
| 1504 | |
| 1505 if (curwin->w_topline == curbuf->b_ml.ml_line_count | |
| 1506 #ifdef FEAT_DIFF | |
| 1507 && curwin->w_topfill == 0 | |
| 1508 #endif | |
| 1509 ) | |
| 1510 return; | |
| 1511 | |
| 1512 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1513 | |
| 1514 /* | |
| 1515 * Compute the row number of the first row of the cursor line | |
| 1516 * and make sure it doesn't go off the screen. Make sure the cursor | |
| 1517 * doesn't go before 'scrolloff' lines from the screen start. | |
| 1518 */ | |
| 1519 #ifdef FEAT_DIFF | |
| 1520 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline) | |
| 1521 - curwin->w_topfill; | |
| 1522 #else | |
| 1523 start_row = curwin->w_wrow - plines(curwin->w_topline); | |
| 1524 #endif | |
|
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|
1525 if (curwin->w_p_wrap && curwin->w_width != 0) |
| 7 | 1526 { |
| 1527 validate_virtcol(); | |
|
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|
1528 start_row -= curwin->w_virtcol / curwin->w_width; |
| 7 | 1529 } |
|
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changeset
|
1530 if (start_row >= get_scrolloff_value()) |
| 7 | 1531 { |
| 1532 #ifdef FEAT_DIFF | |
| 1533 if (curwin->w_topfill > 0) | |
| 1534 --curwin->w_topfill; | |
| 1535 else | |
| 1536 #endif | |
| 36 | 1537 { |
| 1538 #ifdef FEAT_FOLDING | |
| 1539 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline); | |
| 1540 #endif | |
| 7 | 1541 ++curwin->w_topline; |
| 36 | 1542 } |
| 7 | 1543 ++curwin->w_botline; /* approximate w_botline */ |
| 1544 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1545 } | |
| 1546 } | |
| 1547 #endif /* FEAT_INS_EXPAND */ | |
| 1548 | |
| 1549 /* | |
| 1550 * Add one line above "lp->lnum". This can be a filler line, a closed fold or | |
| 1551 * a (wrapped) text line. Uses and sets "lp->fill". | |
| 1552 * Returns the height of the added line in "lp->height". | |
|
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1553 * Lines above the first one are incredibly high: MAXCOL. |
| 7 | 1554 */ |
| 1555 static void | |
|
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|
1556 topline_back(lineoff_T *lp) |
| 7 | 1557 { |
| 1558 #ifdef FEAT_DIFF | |
| 1559 if (lp->fill < diff_check_fill(curwin, lp->lnum)) | |
| 1560 { | |
| 1561 /* Add a filler line. */ | |
| 1562 ++lp->fill; | |
| 1563 lp->height = 1; | |
| 1564 } | |
| 1565 else | |
| 1566 #endif | |
| 1567 { | |
| 1568 --lp->lnum; | |
| 1569 #ifdef FEAT_DIFF | |
| 1570 lp->fill = 0; | |
| 1571 #endif | |
| 1572 if (lp->lnum < 1) | |
| 1573 lp->height = MAXCOL; | |
| 1574 else | |
| 1575 #ifdef FEAT_FOLDING | |
| 1576 if (hasFolding(lp->lnum, &lp->lnum, NULL)) | |
| 1577 /* Add a closed fold */ | |
| 1578 lp->height = 1; | |
| 1579 else | |
| 1580 #endif | |
|
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changeset
|
1581 lp->height = PLINES_NOFILL(lp->lnum); |
| 7 | 1582 } |
| 1583 } | |
| 1584 | |
| 1585 /* | |
| 1586 * Add one line below "lp->lnum". This can be a filler line, a closed fold or | |
| 1587 * a (wrapped) text line. Uses and sets "lp->fill". | |
| 1588 * Returns the height of the added line in "lp->height". | |
| 1589 * Lines below the last one are incredibly high. | |
| 1590 */ | |
| 1591 static void | |
|
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changeset
|
1592 botline_forw(lineoff_T *lp) |
| 7 | 1593 { |
| 1594 #ifdef FEAT_DIFF | |
| 1595 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1)) | |
| 1596 { | |
| 1597 /* Add a filler line. */ | |
| 1598 ++lp->fill; | |
| 1599 lp->height = 1; | |
| 1600 } | |
| 1601 else | |
| 1602 #endif | |
| 1603 { | |
| 1604 ++lp->lnum; | |
| 1605 #ifdef FEAT_DIFF | |
| 1606 lp->fill = 0; | |
| 1607 #endif | |
| 1608 if (lp->lnum > curbuf->b_ml.ml_line_count) | |
| 1609 lp->height = MAXCOL; | |
| 1610 else | |
| 1611 #ifdef FEAT_FOLDING | |
| 1612 if (hasFolding(lp->lnum, NULL, &lp->lnum)) | |
| 1613 /* Add a closed fold */ | |
| 1614 lp->height = 1; | |
| 1615 else | |
| 1616 #endif | |
| 1617 { | |
|
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changeset
|
1618 lp->height = PLINES_NOFILL(lp->lnum); |
| 7 | 1619 } |
| 1620 } | |
| 1621 } | |
| 1622 | |
| 1623 #ifdef FEAT_DIFF | |
| 1624 /* | |
| 1625 * Switch from including filler lines below lp->lnum to including filler | |
| 1626 * lines above loff.lnum + 1. This keeps pointing to the same line. | |
| 1627 * When there are no filler lines nothing changes. | |
| 1628 */ | |
| 1629 static void | |
|
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changeset
|
1630 botline_topline(lineoff_T *lp) |
| 7 | 1631 { |
| 1632 if (lp->fill > 0) | |
| 1633 { | |
| 1634 ++lp->lnum; | |
| 1635 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1; | |
| 1636 } | |
| 1637 } | |
| 1638 | |
| 1639 /* | |
| 1640 * Switch from including filler lines above lp->lnum to including filler | |
| 1641 * lines below loff.lnum - 1. This keeps pointing to the same line. | |
| 1642 * When there are no filler lines nothing changes. | |
| 1643 */ | |
| 1644 static void | |
|
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changeset
|
1645 topline_botline(lineoff_T *lp) |
| 7 | 1646 { |
| 1647 if (lp->fill > 0) | |
| 1648 { | |
| 1649 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1; | |
| 1650 --lp->lnum; | |
| 1651 } | |
| 1652 } | |
| 1653 #endif | |
| 1654 | |
| 1655 /* | |
| 1656 * Recompute topline to put the cursor at the top of the window. | |
| 1657 * Scroll at least "min_scroll" lines. | |
| 1658 * If "always" is TRUE, always set topline (for "zt"). | |
| 1659 */ | |
| 1660 void | |
|
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changeset
|
1661 scroll_cursor_top(int min_scroll, int always) |
| 7 | 1662 { |
| 1663 int scrolled = 0; | |
| 1664 int extra = 0; | |
| 1665 int used; | |
| 1666 int i; | |
| 1667 linenr_T top; /* just above displayed lines */ | |
| 1668 linenr_T bot; /* just below displayed lines */ | |
| 1669 linenr_T old_topline = curwin->w_topline; | |
| 1670 #ifdef FEAT_DIFF | |
| 1671 linenr_T old_topfill = curwin->w_topfill; | |
| 1672 #endif | |
| 1673 linenr_T new_topline; | |
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changeset
|
1674 int off = get_scrolloff_value(); |
| 7 | 1675 |
| 1676 #ifdef FEAT_MOUSE | |
| 1677 if (mouse_dragging > 0) | |
| 1678 off = mouse_dragging - 1; | |
| 1679 #endif | |
| 1680 | |
| 1681 /* | |
| 1682 * Decrease topline until: | |
| 1683 * - it has become 1 | |
| 1684 * - (part of) the cursor line is moved off the screen or | |
| 1685 * - moved at least 'scrolljump' lines and | |
| 1686 * - at least 'scrolloff' lines above and below the cursor | |
| 1687 */ | |
| 1688 validate_cheight(); | |
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|
1689 used = curwin->w_cline_height; /* includes filler lines above */ |
| 7 | 1690 if (curwin->w_cursor.lnum < curwin->w_topline) |
| 1691 scrolled = used; | |
| 1692 | |
| 1693 #ifdef FEAT_FOLDING | |
| 1694 if (hasFolding(curwin->w_cursor.lnum, &top, &bot)) | |
| 1695 { | |
| 1696 --top; | |
| 1697 ++bot; | |
| 1698 } | |
| 1699 else | |
| 1700 #endif | |
| 1701 { | |
| 1702 top = curwin->w_cursor.lnum - 1; | |
| 1703 bot = curwin->w_cursor.lnum + 1; | |
| 1704 } | |
| 1705 new_topline = top + 1; | |
| 1706 | |
| 1707 #ifdef FEAT_DIFF | |
|
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1708 /* "used" already contains the number of filler lines above, don't add it |
|
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|
1709 * again. |
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|
1710 * Hide filler lines above cursor line by adding them to "extra". */ |
|
8a58dde655a8
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changeset
|
1711 extra += diff_check_fill(curwin, curwin->w_cursor.lnum); |
| 7 | 1712 #endif |
| 1713 | |
| 1714 /* | |
| 1715 * Check if the lines from "top" to "bot" fit in the window. If they do, | |
| 1716 * set new_topline and advance "top" and "bot" to include more lines. | |
| 1717 */ | |
| 1718 while (top > 0) | |
| 1719 { | |
| 1720 #ifdef FEAT_FOLDING | |
| 1721 if (hasFolding(top, &top, NULL)) | |
| 1722 /* count one logical line for a sequence of folded lines */ | |
| 1723 i = 1; | |
| 1724 else | |
| 1725 #endif | |
|
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changeset
|
1726 i = PLINES_NOFILL(top); |
| 7 | 1727 used += i; |
| 1728 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count) | |
| 1729 { | |
| 1730 #ifdef FEAT_FOLDING | |
| 1731 if (hasFolding(bot, NULL, &bot)) | |
| 1732 /* count one logical line for a sequence of folded lines */ | |
| 1733 ++used; | |
| 1734 else | |
| 1735 #endif | |
| 1736 used += plines(bot); | |
| 1737 } | |
| 1738 if (used > curwin->w_height) | |
| 1739 break; | |
| 1740 if (top < curwin->w_topline) | |
| 1741 scrolled += i; | |
| 1742 | |
| 1743 /* | |
| 1744 * If scrolling is needed, scroll at least 'sj' lines. | |
| 1745 */ | |
| 1746 if ((new_topline >= curwin->w_topline || scrolled > min_scroll) | |
| 1747 && extra >= off) | |
| 1748 break; | |
| 1749 | |
| 1750 extra += i; | |
| 1751 new_topline = top; | |
| 1752 --top; | |
| 1753 ++bot; | |
| 1754 } | |
| 1755 | |
| 1756 /* | |
| 1757 * If we don't have enough space, put cursor in the middle. | |
| 1758 * This makes sure we get the same position when using "k" and "j" | |
| 1759 * in a small window. | |
| 1760 */ | |
| 1761 if (used > curwin->w_height) | |
| 1762 scroll_cursor_halfway(FALSE); | |
| 1763 else | |
| 1764 { | |
| 1765 /* | |
| 1766 * If "always" is FALSE, only adjust topline to a lower value, higher | |
| 1767 * value may happen with wrapping lines | |
| 1768 */ | |
| 1769 if (new_topline < curwin->w_topline || always) | |
| 1770 curwin->w_topline = new_topline; | |
| 1771 if (curwin->w_topline > curwin->w_cursor.lnum) | |
| 1772 curwin->w_topline = curwin->w_cursor.lnum; | |
| 1773 #ifdef FEAT_DIFF | |
| 1774 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 1775 if (curwin->w_topfill > 0 && extra > off) | |
| 1776 { | |
| 1777 curwin->w_topfill -= extra - off; | |
| 1778 if (curwin->w_topfill < 0) | |
| 1779 curwin->w_topfill = 0; | |
| 1780 } | |
| 1781 check_topfill(curwin, FALSE); | |
| 1782 #endif | |
| 1783 if (curwin->w_topline != old_topline | |
| 1784 #ifdef FEAT_DIFF | |
| 1785 || curwin->w_topfill != old_topfill | |
| 1786 #endif | |
| 1787 ) | |
| 1788 curwin->w_valid &= | |
| 1789 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 1790 curwin->w_valid |= VALID_TOPLINE; | |
| 1791 } | |
| 1792 } | |
| 1793 | |
| 1794 /* | |
| 1795 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used" | |
| 1796 * screen lines for text lines. | |
| 1797 */ | |
| 1798 void | |
|
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changeset
|
1799 set_empty_rows(win_T *wp, int used) |
| 7 | 1800 { |
| 1801 #ifdef FEAT_DIFF | |
| 1802 wp->w_filler_rows = 0; | |
| 1803 #endif | |
| 1804 if (used == 0) | |
| 1805 wp->w_empty_rows = 0; /* single line that doesn't fit */ | |
| 1806 else | |
| 1807 { | |
| 1808 wp->w_empty_rows = wp->w_height - used; | |
| 1809 #ifdef FEAT_DIFF | |
| 1810 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count) | |
| 1811 { | |
| 1812 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline); | |
| 1813 if (wp->w_empty_rows > wp->w_filler_rows) | |
| 1814 wp->w_empty_rows -= wp->w_filler_rows; | |
| 1815 else | |
| 1816 { | |
| 1817 wp->w_filler_rows = wp->w_empty_rows; | |
| 1818 wp->w_empty_rows = 0; | |
| 1819 } | |
| 1820 } | |
| 1821 #endif | |
| 1822 } | |
| 1823 } | |
| 1824 | |
| 1825 /* | |
| 1826 * Recompute topline to put the cursor at the bottom of the window. | |
| 1827 * Scroll at least "min_scroll" lines. | |
| 1828 * If "set_topbot" is TRUE, set topline and botline first (for "zb"). | |
| 1829 * This is messy stuff!!! | |
| 1830 */ | |
| 1831 void | |
|
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changeset
|
1832 scroll_cursor_bot(int min_scroll, int set_topbot) |
| 7 | 1833 { |
| 1834 int used; | |
| 1835 int scrolled = 0; | |
| 1836 int extra = 0; | |
| 1837 int i; | |
| 1838 linenr_T line_count; | |
| 1839 linenr_T old_topline = curwin->w_topline; | |
| 1840 lineoff_T loff; | |
| 1841 lineoff_T boff; | |
| 1842 #ifdef FEAT_DIFF | |
| 1843 int old_topfill = curwin->w_topfill; | |
| 1844 int fill_below_window; | |
| 1845 #endif | |
| 1846 linenr_T old_botline = curwin->w_botline; | |
| 1847 linenr_T old_valid = curwin->w_valid; | |
| 1848 int old_empty_rows = curwin->w_empty_rows; | |
| 1849 linenr_T cln; /* Cursor Line Number */ | |
|
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|
1850 long so = get_scrolloff_value(); |
| 7 | 1851 |
| 1852 cln = curwin->w_cursor.lnum; | |
| 1853 if (set_topbot) | |
| 1854 { | |
| 1855 used = 0; | |
| 1856 curwin->w_botline = cln + 1; | |
| 1857 #ifdef FEAT_DIFF | |
| 1858 loff.fill = 0; | |
| 1859 #endif | |
| 1860 for (curwin->w_topline = curwin->w_botline; | |
| 1861 curwin->w_topline > 1; | |
| 1862 curwin->w_topline = loff.lnum) | |
| 1863 { | |
| 1864 loff.lnum = curwin->w_topline; | |
| 1865 topline_back(&loff); | |
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1866 if (loff.height == MAXCOL || used + loff.height > curwin->w_height) |
| 7 | 1867 break; |
| 1868 used += loff.height; | |
| 1869 #ifdef FEAT_DIFF | |
| 1870 curwin->w_topfill = loff.fill; | |
| 1871 #endif | |
| 1872 } | |
| 1873 set_empty_rows(curwin, used); | |
| 1874 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 1875 if (curwin->w_topline != old_topline | |
| 1876 #ifdef FEAT_DIFF | |
| 1877 || curwin->w_topfill != old_topfill | |
| 1878 #endif | |
| 1879 ) | |
| 1880 curwin->w_valid &= ~(VALID_WROW|VALID_CROW); | |
| 1881 } | |
| 1882 else | |
| 1883 validate_botline(); | |
| 1884 | |
| 1885 /* The lines of the cursor line itself are always used. */ | |
| 1886 #ifdef FEAT_DIFF | |
| 1887 used = plines_nofill(cln); | |
| 1888 #else | |
| 1889 validate_cheight(); | |
| 1890 used = curwin->w_cline_height; | |
| 1891 #endif | |
| 1892 | |
| 1893 /* If the cursor is below botline, we will at least scroll by the height | |
| 1894 * of the cursor line. Correct for empty lines, which are really part of | |
| 1895 * botline. */ | |
| 1896 if (cln >= curwin->w_botline) | |
| 1897 { | |
| 1898 scrolled = used; | |
| 1899 if (cln == curwin->w_botline) | |
| 1900 scrolled -= curwin->w_empty_rows; | |
| 1901 } | |
| 1902 | |
| 1903 /* | |
| 1904 * Stop counting lines to scroll when | |
| 1905 * - hitting start of the file | |
| 1906 * - scrolled nothing or at least 'sj' lines | |
|
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|
1907 * - at least 'scrolloff' lines below the cursor |
| 7 | 1908 * - lines between botline and cursor have been counted |
| 1909 */ | |
| 1910 #ifdef FEAT_FOLDING | |
| 1911 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum)) | |
| 1912 #endif | |
| 1913 { | |
| 1914 loff.lnum = cln; | |
| 1915 boff.lnum = cln; | |
| 1916 } | |
| 1917 #ifdef FEAT_DIFF | |
| 1918 loff.fill = 0; | |
| 1919 boff.fill = 0; | |
| 1920 fill_below_window = diff_check_fill(curwin, curwin->w_botline) | |
| 1921 - curwin->w_filler_rows; | |
| 1922 #endif | |
| 1923 | |
| 1924 while (loff.lnum > 1) | |
| 1925 { | |
| 1926 /* Stop when scrolled nothing or at least "min_scroll", found "extra" | |
| 1927 * context for 'scrolloff' and counted all lines below the window. */ | |
| 1928 if ((((scrolled <= 0 || scrolled >= min_scroll) | |
| 1929 && extra >= ( | |
| 1930 #ifdef FEAT_MOUSE | |
| 1121 | 1931 mouse_dragging > 0 ? mouse_dragging - 1 : |
| 7 | 1932 #endif |
|
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1933 so)) |
| 7 | 1934 || boff.lnum + 1 > curbuf->b_ml.ml_line_count) |
| 1935 && loff.lnum <= curwin->w_botline | |
| 1936 #ifdef FEAT_DIFF | |
| 1937 && (loff.lnum < curwin->w_botline | |
| 1938 || loff.fill >= fill_below_window) | |
| 1939 #endif | |
| 1940 ) | |
| 1941 break; | |
| 1942 | |
| 1943 /* Add one line above */ | |
| 1944 topline_back(&loff); | |
|
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1945 if (loff.height == MAXCOL) |
|
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1946 used = MAXCOL; |
|
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1947 else |
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1948 used += loff.height; |
| 7 | 1949 if (used > curwin->w_height) |
| 1950 break; | |
| 1951 if (loff.lnum >= curwin->w_botline | |
| 1952 #ifdef FEAT_DIFF | |
| 1953 && (loff.lnum > curwin->w_botline | |
| 1954 || loff.fill <= fill_below_window) | |
| 1955 #endif | |
| 1956 ) | |
| 1957 { | |
| 1958 /* Count screen lines that are below the window. */ | |
| 1959 scrolled += loff.height; | |
| 1960 if (loff.lnum == curwin->w_botline | |
| 1961 #ifdef FEAT_DIFF | |
|
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1962 && loff.fill == 0 |
| 7 | 1963 #endif |
| 1964 ) | |
| 1965 scrolled -= curwin->w_empty_rows; | |
| 1966 } | |
| 1967 | |
| 1968 if (boff.lnum < curbuf->b_ml.ml_line_count) | |
| 1969 { | |
| 1970 /* Add one line below */ | |
| 1971 botline_forw(&boff); | |
| 1972 used += boff.height; | |
| 1973 if (used > curwin->w_height) | |
| 1974 break; | |
| 1975 if (extra < ( | |
| 1976 #ifdef FEAT_MOUSE | |
| 1977 mouse_dragging > 0 ? mouse_dragging - 1 : | |
| 1978 #endif | |
|
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1979 so) || scrolled < min_scroll) |
| 7 | 1980 { |
| 1981 extra += boff.height; | |
| 1982 if (boff.lnum >= curwin->w_botline | |
| 1983 #ifdef FEAT_DIFF | |
| 1984 || (boff.lnum + 1 == curwin->w_botline | |
| 1985 && boff.fill > curwin->w_filler_rows) | |
| 1986 #endif | |
| 1987 ) | |
| 1988 { | |
| 1989 /* Count screen lines that are below the window. */ | |
| 1990 scrolled += boff.height; | |
| 1991 if (boff.lnum == curwin->w_botline | |
| 1992 #ifdef FEAT_DIFF | |
| 1993 && boff.fill == 0 | |
| 1994 #endif | |
| 1995 ) | |
| 1996 scrolled -= curwin->w_empty_rows; | |
| 1997 } | |
| 1998 } | |
| 1999 } | |
| 2000 } | |
| 2001 | |
| 2002 /* curwin->w_empty_rows is larger, no need to scroll */ | |
| 2003 if (scrolled <= 0) | |
| 2004 line_count = 0; | |
| 2005 /* more than a screenfull, don't scroll but redraw */ | |
| 2006 else if (used > curwin->w_height) | |
| 2007 line_count = used; | |
| 2008 /* scroll minimal number of lines */ | |
| 2009 else | |
| 2010 { | |
| 2011 line_count = 0; | |
| 2012 #ifdef FEAT_DIFF | |
| 2013 boff.fill = curwin->w_topfill; | |
| 2014 #endif | |
| 2015 boff.lnum = curwin->w_topline - 1; | |
| 2016 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; ) | |
| 2017 { | |
| 2018 botline_forw(&boff); | |
| 2019 i += boff.height; | |
| 2020 ++line_count; | |
| 2021 } | |
| 2022 if (i < scrolled) /* below curwin->w_botline, don't scroll */ | |
| 2023 line_count = 9999; | |
| 2024 } | |
| 2025 | |
| 2026 /* | |
| 2027 * Scroll up if the cursor is off the bottom of the screen a bit. | |
| 2028 * Otherwise put it at 1/2 of the screen. | |
| 2029 */ | |
| 2030 if (line_count >= curwin->w_height && line_count > min_scroll) | |
| 2031 scroll_cursor_halfway(FALSE); | |
| 2032 else | |
| 2033 scrollup(line_count, TRUE); | |
| 2034 | |
| 2035 /* | |
| 2036 * If topline didn't change we need to restore w_botline and w_empty_rows | |
| 2037 * (we changed them). | |
| 2038 * If topline did change, update_screen() will set botline. | |
| 2039 */ | |
| 2040 if (curwin->w_topline == old_topline && set_topbot) | |
| 2041 { | |
| 2042 curwin->w_botline = old_botline; | |
| 2043 curwin->w_empty_rows = old_empty_rows; | |
| 2044 curwin->w_valid = old_valid; | |
| 2045 } | |
| 2046 curwin->w_valid |= VALID_TOPLINE; | |
| 2047 } | |
| 2048 | |
| 2049 /* | |
| 2050 * Recompute topline to put the cursor halfway the window | |
| 2051 * If "atend" is TRUE, also put it halfway at the end of the file. | |
| 2052 */ | |
| 2053 void | |
|
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changeset
|
2054 scroll_cursor_halfway(int atend) |
| 7 | 2055 { |
| 2056 int above = 0; | |
| 2057 linenr_T topline; | |
| 2058 #ifdef FEAT_DIFF | |
| 2059 int topfill = 0; | |
| 2060 #endif | |
| 2061 int below = 0; | |
| 2062 int used; | |
| 2063 lineoff_T loff; | |
| 2064 lineoff_T boff; | |
| 5661 | 2065 #ifdef FEAT_DIFF |
| 5653 | 2066 linenr_T old_topline = curwin->w_topline; |
| 5661 | 2067 #endif |
| 7 | 2068 |
| 2069 loff.lnum = boff.lnum = curwin->w_cursor.lnum; | |
| 2070 #ifdef FEAT_FOLDING | |
| 2071 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum); | |
| 2072 #endif | |
| 2073 #ifdef FEAT_DIFF | |
| 2074 used = plines_nofill(loff.lnum); | |
| 2075 loff.fill = 0; | |
| 2076 boff.fill = 0; | |
| 2077 #else | |
| 2078 used = plines(loff.lnum); | |
| 2079 #endif | |
| 2080 topline = loff.lnum; | |
| 2081 while (topline > 1) | |
| 2082 { | |
| 2083 if (below <= above) /* add a line below the cursor first */ | |
| 2084 { | |
| 2085 if (boff.lnum < curbuf->b_ml.ml_line_count) | |
| 2086 { | |
| 2087 botline_forw(&boff); | |
| 2088 used += boff.height; | |
| 2089 if (used > curwin->w_height) | |
| 2090 break; | |
| 2091 below += boff.height; | |
| 2092 } | |
| 2093 else | |
| 2094 { | |
| 2095 ++below; /* count a "~" line */ | |
| 2096 if (atend) | |
| 2097 ++used; | |
| 2098 } | |
| 2099 } | |
| 2100 | |
| 2101 if (below > above) /* add a line above the cursor */ | |
| 2102 { | |
| 2103 topline_back(&loff); | |
|
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2104 if (loff.height == MAXCOL) |
|
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2105 used = MAXCOL; |
|
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2106 else |
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|
2107 used += loff.height; |
| 7 | 2108 if (used > curwin->w_height) |
| 2109 break; | |
| 2110 above += loff.height; | |
| 2111 topline = loff.lnum; | |
| 2112 #ifdef FEAT_DIFF | |
| 2113 topfill = loff.fill; | |
| 2114 #endif | |
| 2115 } | |
| 2116 } | |
| 2117 #ifdef FEAT_FOLDING | |
| 2118 if (!hasFolding(topline, &curwin->w_topline, NULL)) | |
| 2119 #endif | |
| 2120 curwin->w_topline = topline; | |
| 2121 #ifdef FEAT_DIFF | |
| 2122 curwin->w_topfill = topfill; | |
| 5653 | 2123 if (old_topline > curwin->w_topline + curwin->w_height) |
| 2124 curwin->w_botfill = FALSE; | |
| 7 | 2125 check_topfill(curwin, FALSE); |
| 2126 #endif | |
| 2127 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2128 curwin->w_valid |= VALID_TOPLINE; | |
| 2129 } | |
| 2130 | |
| 2131 /* | |
| 2132 * Correct the cursor position so that it is in a part of the screen at least | |
|
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|
2133 * 'scrolloff' lines from the top and bottom, if possible. |
| 7 | 2134 * If not possible, put it at the same position as scroll_cursor_halfway(). |
| 2135 * When called topline must be valid! | |
| 2136 */ | |
| 2137 void | |
|
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diff
changeset
|
2138 cursor_correct(void) |
| 7 | 2139 { |
| 2140 int above = 0; /* screen lines above topline */ | |
| 2141 linenr_T topline; | |
| 2142 int below = 0; /* screen lines below botline */ | |
| 2143 linenr_T botline; | |
| 2144 int above_wanted, below_wanted; | |
| 2145 linenr_T cln; /* Cursor Line Number */ | |
| 2146 int max_off; | |
|
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|
2147 long so = get_scrolloff_value(); |
| 7 | 2148 |
| 2149 /* | |
| 2150 * How many lines we would like to have above/below the cursor depends on | |
| 2151 * whether the first/last line of the file is on screen. | |
| 2152 */ | |
|
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|
2153 above_wanted = so; |
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|
2154 below_wanted = so; |
| 7 | 2155 #ifdef FEAT_MOUSE |
| 1121 | 2156 if (mouse_dragging > 0) |
| 7 | 2157 { |
| 2158 above_wanted = mouse_dragging - 1; | |
| 2159 below_wanted = mouse_dragging - 1; | |
| 2160 } | |
| 2161 #endif | |
| 2162 if (curwin->w_topline == 1) | |
| 2163 { | |
| 2164 above_wanted = 0; | |
| 2165 max_off = curwin->w_height / 2; | |
| 2166 if (below_wanted > max_off) | |
| 2167 below_wanted = max_off; | |
| 2168 } | |
| 2169 validate_botline(); | |
| 2170 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1 | |
| 2171 #ifdef FEAT_MOUSE | |
| 1121 | 2172 && mouse_dragging == 0 |
| 7 | 2173 #endif |
| 2174 ) | |
| 2175 { | |
| 2176 below_wanted = 0; | |
| 2177 max_off = (curwin->w_height - 1) / 2; | |
| 2178 if (above_wanted > max_off) | |
| 2179 above_wanted = max_off; | |
| 2180 } | |
| 2181 | |
| 2182 /* | |
| 2183 * If there are sufficient file-lines above and below the cursor, we can | |
| 2184 * return now. | |
| 2185 */ | |
| 2186 cln = curwin->w_cursor.lnum; | |
| 2187 if (cln >= curwin->w_topline + above_wanted | |
| 2188 && cln < curwin->w_botline - below_wanted | |
| 2189 #ifdef FEAT_FOLDING | |
| 2190 && !hasAnyFolding(curwin) | |
| 2191 #endif | |
| 2192 ) | |
| 2193 return; | |
| 2194 | |
| 2195 /* | |
| 2196 * Narrow down the area where the cursor can be put by taking lines from | |
| 2197 * the top and the bottom until: | |
| 2198 * - the desired context lines are found | |
| 2199 * - the lines from the top is past the lines from the bottom | |
| 2200 */ | |
| 2201 topline = curwin->w_topline; | |
| 2202 botline = curwin->w_botline - 1; | |
| 2203 #ifdef FEAT_DIFF | |
| 2204 /* count filler lines as context */ | |
| 2205 above = curwin->w_topfill; | |
| 2206 below = curwin->w_filler_rows; | |
| 2207 #endif | |
| 2208 while ((above < above_wanted || below < below_wanted) && topline < botline) | |
| 2209 { | |
| 2210 if (below < below_wanted && (below <= above || above >= above_wanted)) | |
| 2211 { | |
| 2212 #ifdef FEAT_FOLDING | |
| 2213 if (hasFolding(botline, &botline, NULL)) | |
| 2214 ++below; | |
| 2215 else | |
| 2216 #endif | |
| 2217 below += plines(botline); | |
| 2218 --botline; | |
| 2219 } | |
| 2220 if (above < above_wanted && (above < below || below >= below_wanted)) | |
| 2221 { | |
| 2222 #ifdef FEAT_FOLDING | |
| 2223 if (hasFolding(topline, NULL, &topline)) | |
| 2224 ++above; | |
| 2225 else | |
| 2226 #endif | |
|
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|
2227 above += PLINES_NOFILL(topline); |
|
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diff
changeset
|
2228 #ifdef FEAT_DIFF |
| 7 | 2229 /* Count filler lines below this line as context. */ |
| 2230 if (topline < botline) | |
| 2231 above += diff_check_fill(curwin, topline + 1); | |
| 2232 #endif | |
| 2233 ++topline; | |
| 2234 } | |
| 2235 } | |
| 2236 if (topline == botline || botline == 0) | |
| 2237 curwin->w_cursor.lnum = topline; | |
| 2238 else if (topline > botline) | |
| 2239 curwin->w_cursor.lnum = botline; | |
| 2240 else | |
| 2241 { | |
| 2242 if (cln < topline && curwin->w_topline > 1) | |
| 2243 { | |
| 2244 curwin->w_cursor.lnum = topline; | |
| 2245 curwin->w_valid &= | |
| 2246 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW); | |
| 2247 } | |
| 2248 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 2249 { | |
| 2250 curwin->w_cursor.lnum = botline; | |
| 2251 curwin->w_valid &= | |
| 2252 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW); | |
| 2253 } | |
| 2254 } | |
| 2255 curwin->w_valid |= VALID_TOPLINE; | |
| 2256 } | |
| 2257 | |
|
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diff
changeset
|
2258 static void get_scroll_overlap(lineoff_T *lp, int dir); |
| 7 | 2259 |
| 2260 /* | |
| 2261 * move screen 'count' pages up or down and update screen | |
| 2262 * | |
| 2263 * return FAIL for failure, OK otherwise | |
| 2264 */ | |
| 2265 int | |
|
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diff
changeset
|
2266 onepage(int dir, long count) |
| 7 | 2267 { |
| 2268 long n; | |
| 2269 int retval = OK; | |
| 2270 lineoff_T loff; | |
| 2271 linenr_T old_topline = curwin->w_topline; | |
|
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|
2272 long so = get_scrolloff_value(); |
| 7 | 2273 |
| 2274 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */ | |
| 2275 { | |
| 2276 beep_flush(); | |
| 2277 return FAIL; | |
| 2278 } | |
| 2279 | |
| 2280 for ( ; count > 0; --count) | |
| 2281 { | |
| 2282 validate_botline(); | |
| 2283 /* | |
| 2284 * It's an error to move a page up when the first line is already on | |
| 2285 * the screen. It's an error to move a page down when the last line | |
| 2286 * is on the screen and the topline is 'scrolloff' lines from the | |
| 2287 * last line. | |
| 2288 */ | |
| 2289 if (dir == FORWARD | |
|
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|
2290 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - so) |
| 7 | 2291 && curwin->w_botline > curbuf->b_ml.ml_line_count) |
| 2292 : (curwin->w_topline == 1 | |
| 2293 #ifdef FEAT_DIFF | |
| 2294 && curwin->w_topfill == | |
| 2295 diff_check_fill(curwin, curwin->w_topline) | |
| 2296 #endif | |
| 2297 )) | |
| 2298 { | |
| 2299 beep_flush(); | |
| 2300 retval = FAIL; | |
| 2301 break; | |
| 2302 } | |
| 2303 | |
| 2304 #ifdef FEAT_DIFF | |
| 2305 loff.fill = 0; | |
| 2306 #endif | |
| 2307 if (dir == FORWARD) | |
| 2308 { | |
|
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changeset
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2309 if (ONE_WINDOW && p_window > 0 && p_window < Rows - 1) |
| 7 | 2310 { |
| 164 | 2311 /* Vi compatible scrolling */ |
| 2312 if (p_window <= 2) | |
| 2313 ++curwin->w_topline; | |
| 2314 else | |
| 2315 curwin->w_topline += p_window - 2; | |
| 2316 if (curwin->w_topline > curbuf->b_ml.ml_line_count) | |
| 2317 curwin->w_topline = curbuf->b_ml.ml_line_count; | |
| 2318 curwin->w_cursor.lnum = curwin->w_topline; | |
| 2319 } | |
| 2320 else if (curwin->w_botline > curbuf->b_ml.ml_line_count) | |
| 2321 { | |
| 2322 /* at end of file */ | |
| 7 | 2323 curwin->w_topline = curbuf->b_ml.ml_line_count; |
| 2324 #ifdef FEAT_DIFF | |
| 2325 curwin->w_topfill = 0; | |
| 2326 #endif | |
| 2327 curwin->w_valid &= ~(VALID_WROW|VALID_CROW); | |
| 2328 } | |
| 2329 else | |
| 2330 { | |
| 2331 /* For the overlap, start with the line just below the window | |
| 2332 * and go upwards. */ | |
| 2333 loff.lnum = curwin->w_botline; | |
| 2334 #ifdef FEAT_DIFF | |
| 2335 loff.fill = diff_check_fill(curwin, loff.lnum) | |
| 2336 - curwin->w_filler_rows; | |
| 2337 #endif | |
| 2338 get_scroll_overlap(&loff, -1); | |
| 2339 curwin->w_topline = loff.lnum; | |
| 2340 #ifdef FEAT_DIFF | |
| 2341 curwin->w_topfill = loff.fill; | |
| 2342 check_topfill(curwin, FALSE); | |
| 2343 #endif | |
| 2344 curwin->w_cursor.lnum = curwin->w_topline; | |
| 2345 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW| | |
| 2346 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2347 } | |
| 2348 } | |
| 2349 else /* dir == BACKWARDS */ | |
| 2350 { | |
| 2351 #ifdef FEAT_DIFF | |
| 2352 if (curwin->w_topline == 1) | |
| 2353 { | |
| 2354 /* Include max number of filler lines */ | |
| 2355 max_topfill(); | |
| 2356 continue; | |
| 2357 } | |
| 2358 #endif | |
|
10349
cf988222b150
commit https://github.com/vim/vim/commit/a1f4cb93ba50ea9e40cd4b1f5592b8a6d1398660
Christian Brabandt <cb@256bit.org>
parents:
10295
diff
changeset
|
2359 if (ONE_WINDOW && p_window > 0 && p_window < Rows - 1) |
| 164 | 2360 { |
| 2361 /* Vi compatible scrolling (sort of) */ | |
| 2362 if (p_window <= 2) | |
| 2363 --curwin->w_topline; | |
| 2364 else | |
| 2365 curwin->w_topline -= p_window - 2; | |
| 2366 if (curwin->w_topline < 1) | |
| 2367 curwin->w_topline = 1; | |
| 2368 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1; | |
| 2369 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count) | |
| 2370 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count; | |
| 2371 continue; | |
| 2372 } | |
| 2373 | |
| 7 | 2374 /* Find the line at the top of the window that is going to be the |
| 2375 * line at the bottom of the window. Make sure this results in | |
| 2376 * the same line as before doing CTRL-F. */ | |
| 2377 loff.lnum = curwin->w_topline - 1; | |
| 2378 #ifdef FEAT_DIFF | |
| 2379 loff.fill = diff_check_fill(curwin, loff.lnum + 1) | |
| 2380 - curwin->w_topfill; | |
| 2381 #endif | |
| 2382 get_scroll_overlap(&loff, 1); | |
| 2383 | |
| 2384 if (loff.lnum >= curbuf->b_ml.ml_line_count) | |
| 2385 { | |
| 2386 loff.lnum = curbuf->b_ml.ml_line_count; | |
| 2387 #ifdef FEAT_DIFF | |
| 2388 loff.fill = 0; | |
| 2389 } | |
| 2390 else | |
| 2391 { | |
| 2392 botline_topline(&loff); | |
| 2393 #endif | |
| 2394 } | |
| 2395 curwin->w_cursor.lnum = loff.lnum; | |
| 2396 | |
| 2397 /* Find the line just above the new topline to get the right line | |
| 2398 * at the bottom of the window. */ | |
| 2399 n = 0; | |
| 2400 while (n <= curwin->w_height && loff.lnum >= 1) | |
| 2401 { | |
| 2402 topline_back(&loff); | |
|
2082
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2403 if (loff.height == MAXCOL) |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2404 n = MAXCOL; |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2405 else |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2406 n += loff.height; |
| 7 | 2407 } |
|
2082
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2408 if (loff.lnum < 1) /* at begin of file */ |
| 7 | 2409 { |
| 2410 curwin->w_topline = 1; | |
| 2411 #ifdef FEAT_DIFF | |
| 2412 max_topfill(); | |
| 2413 #endif | |
| 2414 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 2415 } | |
| 2416 else | |
| 2417 { | |
| 2418 /* Go two lines forward again. */ | |
| 2419 #ifdef FEAT_DIFF | |
| 2420 topline_botline(&loff); | |
| 2421 #endif | |
| 2422 botline_forw(&loff); | |
| 2423 botline_forw(&loff); | |
| 2424 #ifdef FEAT_DIFF | |
| 2425 botline_topline(&loff); | |
| 2426 #endif | |
| 2427 #ifdef FEAT_FOLDING | |
| 2428 /* We're at the wrong end of a fold now. */ | |
| 2429 (void)hasFolding(loff.lnum, &loff.lnum, NULL); | |
| 2430 #endif | |
| 2431 | |
| 2432 /* Always scroll at least one line. Avoid getting stuck on | |
| 2433 * very long lines. */ | |
| 2434 if (loff.lnum >= curwin->w_topline | |
| 2435 #ifdef FEAT_DIFF | |
| 2436 && (loff.lnum > curwin->w_topline | |
| 2437 || loff.fill >= curwin->w_topfill) | |
| 2438 #endif | |
| 2439 ) | |
| 2440 { | |
| 2441 #ifdef FEAT_DIFF | |
| 2442 /* First try using the maximum number of filler lines. If | |
| 2443 * that's not enough, backup one line. */ | |
| 2444 loff.fill = curwin->w_topfill; | |
| 2445 if (curwin->w_topfill < diff_check_fill(curwin, | |
| 2446 curwin->w_topline)) | |
| 2447 max_topfill(); | |
| 2448 if (curwin->w_topfill == loff.fill) | |
| 2449 #endif | |
| 2450 { | |
| 2451 --curwin->w_topline; | |
| 2452 #ifdef FEAT_DIFF | |
| 2453 curwin->w_topfill = 0; | |
| 2454 #endif | |
| 2455 } | |
| 2456 comp_botline(curwin); | |
| 2457 curwin->w_cursor.lnum = curwin->w_botline - 1; | |
| 5764 | 2458 curwin->w_valid &= |
| 2459 ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW|VALID_CROW); | |
| 7 | 2460 } |
| 2461 else | |
| 2462 { | |
| 2463 curwin->w_topline = loff.lnum; | |
| 2464 #ifdef FEAT_DIFF | |
| 2465 curwin->w_topfill = loff.fill; | |
| 2466 check_topfill(curwin, FALSE); | |
| 2467 #endif | |
| 2468 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 2469 } | |
| 2470 } | |
| 2471 } | |
| 2472 } | |
| 2473 #ifdef FEAT_FOLDING | |
| 2474 foldAdjustCursor(); | |
| 2475 #endif | |
| 2476 cursor_correct(); | |
|
10102
b80ad55d62d8
commit https://github.com/vim/vim/commit/bc54f3f3fed4dc3556df8c46cee6739d211b0eb2
Christian Brabandt <cb@256bit.org>
parents:
10042
diff
changeset
|
2477 check_cursor_col(); |
| 161 | 2478 if (retval == OK) |
| 2479 beginline(BL_SOL | BL_FIX); | |
| 7 | 2480 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL); |
| 2481 | |
|
14317
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2482 if (retval == OK && dir == FORWARD) |
| 7 | 2483 { |
|
14317
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2484 // Avoid the screen jumping up and down when 'scrolloff' is non-zero. |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2485 // But make sure we scroll at least one line (happens with mix of long |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2486 // wrapping lines and non-wrapping line). |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2487 if (check_top_offset()) |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2488 { |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2489 scroll_cursor_top(1, FALSE); |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2490 if (curwin->w_topline <= old_topline |
| 7 | 2491 && old_topline < curbuf->b_ml.ml_line_count) |
|
14317
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2492 { |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2493 curwin->w_topline = old_topline + 1; |
| 7 | 2494 #ifdef FEAT_FOLDING |
|
14317
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2495 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2496 #endif |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2497 } |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2498 } |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2499 #ifdef FEAT_FOLDING |
|
1bc96dbb5498
patch 8.1.0174: after paging up and down fold line is wrong
Christian Brabandt <cb@256bit.org>
parents:
13384
diff
changeset
|
2500 else if (curwin->w_botline > curbuf->b_ml.ml_line_count) |
| 7 | 2501 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); |
| 2502 #endif | |
| 2503 } | |
| 2504 | |
| 2505 redraw_later(VALID); | |
| 2506 return retval; | |
| 2507 } | |
| 2508 | |
| 2509 /* | |
| 2510 * Decide how much overlap to use for page-up or page-down scrolling. | |
| 2511 * This is symmetric, so that doing both keeps the same lines displayed. | |
| 2512 * Three lines are examined: | |
| 2513 * | |
| 2514 * before CTRL-F after CTRL-F / before CTRL-B | |
| 2515 * etc. l1 | |
| 2516 * l1 last but one line ------------ | |
| 2517 * l2 last text line l2 top text line | |
| 2518 * ------------- l3 second text line | |
| 2519 * l3 etc. | |
| 2520 */ | |
| 2521 static void | |
|
7829
2a8d6b2dd925
commit https://github.com/vim/vim/commit/9b57814db13c29ecb08260b36923c0e1c8a373a9
Christian Brabandt <cb@256bit.org>
parents:
7803
diff
changeset
|
2522 get_scroll_overlap(lineoff_T *lp, int dir) |
| 7 | 2523 { |
| 2524 int h1, h2, h3, h4; | |
| 2525 int min_height = curwin->w_height - 2; | |
| 2526 lineoff_T loff0, loff1, loff2; | |
| 2527 | |
| 2528 #ifdef FEAT_DIFF | |
| 2529 if (lp->fill > 0) | |
| 2530 lp->height = 1; | |
| 2531 else | |
| 2532 lp->height = plines_nofill(lp->lnum); | |
| 2533 #else | |
| 2534 lp->height = plines(lp->lnum); | |
| 2535 #endif | |
| 2536 h1 = lp->height; | |
| 2537 if (h1 > min_height) | |
| 2538 return; /* no overlap */ | |
| 2539 | |
| 2540 loff0 = *lp; | |
| 2541 if (dir > 0) | |
| 2542 botline_forw(lp); | |
| 2543 else | |
| 2544 topline_back(lp); | |
| 2545 h2 = lp->height; | |
| 3968 | 2546 if (h2 == MAXCOL || h2 + h1 > min_height) |
| 7 | 2547 { |
| 2548 *lp = loff0; /* no overlap */ | |
| 2549 return; | |
| 2550 } | |
| 2551 | |
| 2552 loff1 = *lp; | |
| 2553 if (dir > 0) | |
| 2554 botline_forw(lp); | |
| 2555 else | |
| 2556 topline_back(lp); | |
| 2557 h3 = lp->height; | |
| 3968 | 2558 if (h3 == MAXCOL || h3 + h2 > min_height) |
| 7 | 2559 { |
| 2560 *lp = loff0; /* no overlap */ | |
| 2561 return; | |
| 2562 } | |
| 2563 | |
| 2564 loff2 = *lp; | |
| 2565 if (dir > 0) | |
| 2566 botline_forw(lp); | |
| 2567 else | |
| 2568 topline_back(lp); | |
| 2569 h4 = lp->height; | |
| 3968 | 2570 if (h4 == MAXCOL || h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height) |
| 7 | 2571 *lp = loff1; /* 1 line overlap */ |
| 2572 else | |
| 2573 *lp = loff2; /* 2 lines overlap */ | |
| 2574 return; | |
| 2575 } | |
| 2576 | |
| 2577 /* #define KEEP_SCREEN_LINE */ | |
| 2578 /* | |
| 2579 * Scroll 'scroll' lines up or down. | |
| 2580 */ | |
| 2581 void | |
|
7829
2a8d6b2dd925
commit https://github.com/vim/vim/commit/9b57814db13c29ecb08260b36923c0e1c8a373a9
Christian Brabandt <cb@256bit.org>
parents:
7803
diff
changeset
|
2582 halfpage(int flag, linenr_T Prenum) |
| 7 | 2583 { |
| 2584 long scrolled = 0; | |
| 2585 int i; | |
| 2586 int n; | |
| 2587 int room; | |
| 2588 | |
| 2589 if (Prenum) | |
| 2590 curwin->w_p_scr = (Prenum > curwin->w_height) ? | |
| 2591 curwin->w_height : Prenum; | |
| 2592 n = (curwin->w_p_scr <= curwin->w_height) ? | |
| 2593 curwin->w_p_scr : curwin->w_height; | |
| 2594 | |
|
11258
84f71a8a5f2c
patch 8.0.0515: ml_get errors in silent Ex mode
Christian Brabandt <cb@256bit.org>
parents:
11121
diff
changeset
|
2595 update_topline(); |
| 7 | 2596 validate_botline(); |
| 2597 room = curwin->w_empty_rows; | |
| 2598 #ifdef FEAT_DIFF | |
| 2599 room += curwin->w_filler_rows; | |
| 2600 #endif | |
| 2601 if (flag) | |
| 2602 { | |
| 2603 /* | |
| 2604 * scroll the text up | |
| 2605 */ | |
| 2606 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 2607 { | |
| 2608 #ifdef FEAT_DIFF | |
| 2609 if (curwin->w_topfill > 0) | |
| 2610 { | |
| 2611 i = 1; | |
| 2612 if (--n < 0 && scrolled > 0) | |
| 2613 break; | |
| 2614 --curwin->w_topfill; | |
| 2615 } | |
| 2616 else | |
| 2617 #endif | |
| 2618 { | |
|
7103
84d318257a45
commit https://github.com/vim/vim/commit/43335ea394fe247132b9701c55cccf51e6c36425
Christian Brabandt <cb@256bit.org>
parents:
7088
diff
changeset
|
2619 i = PLINES_NOFILL(curwin->w_topline); |
| 7 | 2620 n -= i; |
| 2621 if (n < 0 && scrolled > 0) | |
| 2622 break; | |
| 2623 #ifdef FEAT_FOLDING | |
| 2624 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline); | |
| 2625 #endif | |
| 2626 ++curwin->w_topline; | |
| 2627 #ifdef FEAT_DIFF | |
| 2628 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 2629 #endif | |
| 2630 | |
| 2631 #ifndef KEEP_SCREEN_LINE | |
| 2632 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) | |
| 2633 { | |
| 2634 ++curwin->w_cursor.lnum; | |
| 2635 curwin->w_valid &= | |
| 2636 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL); | |
| 2637 } | |
| 2638 #endif | |
| 2639 } | |
| 2640 curwin->w_valid &= ~(VALID_CROW|VALID_WROW); | |
| 2641 scrolled += i; | |
| 2642 | |
| 2643 /* | |
| 2644 * Correct w_botline for changed w_topline. | |
| 2645 * Won't work when there are filler lines. | |
| 2646 */ | |
| 2647 #ifdef FEAT_DIFF | |
| 2648 if (curwin->w_p_diff) | |
| 2649 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2650 else | |
| 2651 #endif | |
| 2652 { | |
| 2653 room += i; | |
| 2654 do | |
| 2655 { | |
| 2656 i = plines(curwin->w_botline); | |
| 2657 if (i > room) | |
| 2658 break; | |
| 2659 #ifdef FEAT_FOLDING | |
| 2660 (void)hasFolding(curwin->w_botline, NULL, | |
| 2661 &curwin->w_botline); | |
| 2662 #endif | |
| 2663 ++curwin->w_botline; | |
| 2664 room -= i; | |
| 2665 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count); | |
| 2666 } | |
| 2667 } | |
| 2668 | |
| 2669 #ifndef KEEP_SCREEN_LINE | |
| 2670 /* | |
| 2671 * When hit bottom of the file: move cursor down. | |
| 2672 */ | |
| 2673 if (n > 0) | |
| 2674 { | |
| 2675 # ifdef FEAT_FOLDING | |
| 2676 if (hasAnyFolding(curwin)) | |
| 2677 { | |
| 2678 while (--n >= 0 | |
| 2679 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) | |
| 2680 { | |
| 2681 (void)hasFolding(curwin->w_cursor.lnum, NULL, | |
| 2682 &curwin->w_cursor.lnum); | |
| 2683 ++curwin->w_cursor.lnum; | |
| 2684 } | |
| 2685 } | |
| 2686 else | |
| 2687 # endif | |
| 2688 curwin->w_cursor.lnum += n; | |
| 2689 check_cursor_lnum(); | |
| 2690 } | |
| 2691 #else | |
| 2692 /* try to put the cursor in the same screen line */ | |
| 2693 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0) | |
| 2694 && curwin->w_cursor.lnum < curwin->w_botline - 1) | |
| 2695 { | |
| 2696 scrolled -= plines(curwin->w_cursor.lnum); | |
| 2697 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline) | |
| 2698 break; | |
| 2699 # ifdef FEAT_FOLDING | |
| 2700 (void)hasFolding(curwin->w_cursor.lnum, NULL, | |
| 2701 &curwin->w_cursor.lnum); | |
| 2702 # endif | |
| 2703 ++curwin->w_cursor.lnum; | |
| 2704 } | |
| 2705 #endif | |
| 2706 } | |
| 2707 else | |
| 2708 { | |
| 2709 /* | |
| 2710 * scroll the text down | |
| 2711 */ | |
| 2712 while (n > 0 && curwin->w_topline > 1) | |
| 2713 { | |
| 2714 #ifdef FEAT_DIFF | |
| 2715 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline)) | |
| 2716 { | |
| 2717 i = 1; | |
| 2718 if (--n < 0 && scrolled > 0) | |
| 2719 break; | |
| 2720 ++curwin->w_topfill; | |
| 2721 } | |
| 2722 else | |
| 2723 #endif | |
| 2724 { | |
|
7103
84d318257a45
commit https://github.com/vim/vim/commit/43335ea394fe247132b9701c55cccf51e6c36425
Christian Brabandt <cb@256bit.org>
parents:
7088
diff
changeset
|
2725 i = PLINES_NOFILL(curwin->w_topline - 1); |
| 7 | 2726 n -= i; |
| 2727 if (n < 0 && scrolled > 0) | |
| 2728 break; | |
| 2729 --curwin->w_topline; | |
| 2730 #ifdef FEAT_FOLDING | |
| 2731 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 2732 #endif | |
| 2733 #ifdef FEAT_DIFF | |
| 2734 curwin->w_topfill = 0; | |
| 2735 #endif | |
| 2736 } | |
| 2737 curwin->w_valid &= ~(VALID_CROW|VALID_WROW| | |
| 2738 VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2739 scrolled += i; | |
| 2740 #ifndef KEEP_SCREEN_LINE | |
| 2741 if (curwin->w_cursor.lnum > 1) | |
| 2742 { | |
| 2743 --curwin->w_cursor.lnum; | |
| 2744 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL); | |
| 2745 } | |
| 2746 #endif | |
| 2747 } | |
| 2748 #ifndef KEEP_SCREEN_LINE | |
| 2749 /* | |
| 2750 * When hit top of the file: move cursor up. | |
| 2751 */ | |
| 2752 if (n > 0) | |
| 2753 { | |
| 2754 if (curwin->w_cursor.lnum <= (linenr_T)n) | |
| 2755 curwin->w_cursor.lnum = 1; | |
| 2756 else | |
| 2757 # ifdef FEAT_FOLDING | |
| 2758 if (hasAnyFolding(curwin)) | |
| 2759 { | |
| 2760 while (--n >= 0 && curwin->w_cursor.lnum > 1) | |
| 2761 { | |
| 2762 --curwin->w_cursor.lnum; | |
| 2763 (void)hasFolding(curwin->w_cursor.lnum, | |
| 2764 &curwin->w_cursor.lnum, NULL); | |
| 2765 } | |
| 2766 } | |
| 2767 else | |
| 2768 # endif | |
| 2769 curwin->w_cursor.lnum -= n; | |
| 2770 } | |
| 2771 #else | |
| 2772 /* try to put the cursor in the same screen line */ | |
| 2773 scrolled += n; /* move cursor when topline is 1 */ | |
| 2774 while (curwin->w_cursor.lnum > curwin->w_topline | |
| 2775 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline)) | |
| 2776 { | |
| 2777 scrolled -= plines(curwin->w_cursor.lnum - 1); | |
| 2778 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline) | |
| 2779 break; | |
| 2780 --curwin->w_cursor.lnum; | |
| 2781 # ifdef FEAT_FOLDING | |
| 2782 foldAdjustCursor(); | |
| 2783 # endif | |
| 2784 } | |
| 2785 #endif | |
| 2786 } | |
| 2787 # ifdef FEAT_FOLDING | |
| 2788 /* Move cursor to first line of closed fold. */ | |
| 2789 foldAdjustCursor(); | |
| 2790 # endif | |
| 2791 #ifdef FEAT_DIFF | |
| 2792 check_topfill(curwin, !flag); | |
| 2793 #endif | |
| 2794 cursor_correct(); | |
| 2795 beginline(BL_SOL | BL_FIX); | |
| 2796 redraw_later(VALID); | |
| 2797 } | |
|
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2798 |
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2799 void |
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7829
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|
2800 do_check_cursorbind(void) |
|
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2801 { |
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|
2802 linenr_T line = curwin->w_cursor.lnum; |
| 3415 | 2803 colnr_T col = curwin->w_cursor.col; |
| 2804 colnr_T coladd = curwin->w_cursor.coladd; | |
| 3433 | 2805 colnr_T curswant = curwin->w_curswant; |
| 2806 int set_curswant = curwin->w_set_curswant; | |
|
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2807 win_T *old_curwin = curwin; |
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2808 buf_T *old_curbuf = curbuf; |
| 2693 | 2809 int restart_edit_save; |
|
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2810 int old_VIsual_select = VIsual_select; |
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2811 int old_VIsual_active = VIsual_active; |
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2812 |
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2813 /* |
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2814 * loop through the cursorbound windows |
|
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2815 */ |
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2816 VIsual_select = VIsual_active = 0; |
|
9649
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|
2817 FOR_ALL_WINDOWS(curwin) |
|
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2818 { |
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2819 curbuf = curwin->w_buffer; |
|
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2820 /* skip original window and windows with 'noscrollbind' */ |
|
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2821 if (curwin != old_curwin && curwin->w_p_crb) |
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2822 { |
|
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2823 # ifdef FEAT_DIFF |
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2824 if (curwin->w_p_diff) |
|
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|
2825 curwin->w_cursor.lnum = |
|
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|
2826 diff_get_corresponding_line(old_curbuf, line); |
|
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2827 else |
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2828 # endif |
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2829 curwin->w_cursor.lnum = line; |
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2830 curwin->w_cursor.col = col; |
| 3415 | 2831 curwin->w_cursor.coladd = coladd; |
| 3433 | 2832 curwin->w_curswant = curswant; |
| 2833 curwin->w_set_curswant = set_curswant; | |
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2834 |
| 2693 | 2835 /* Make sure the cursor is in a valid position. Temporarily set |
| 2836 * "restart_edit" to allow the cursor to be beyond the EOL. */ | |
| 2837 restart_edit_save = restart_edit; | |
| 2838 restart_edit = TRUE; | |
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2839 check_cursor(); |
|
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2840 # ifdef FEAT_SYN_HL |
|
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2841 if (curwin->w_p_cul || curwin->w_p_cuc) |
|
10583
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|
2842 validate_cursor(); |
|
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2843 # endif |
| 2693 | 2844 restart_edit = restart_edit_save; |
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2845 /* Correct cursor for multi-byte character. */ |
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2846 if (has_mbyte) |
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2847 mb_adjust_cursor(); |
|
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2848 redraw_later(VALID); |
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2849 |
| 2688 | 2850 /* Only scroll when 'scrollbind' hasn't done this. */ |
| 2851 if (!curwin->w_p_scb) | |
| 2852 update_topline(); | |
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2853 curwin->w_redr_status = TRUE; |
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2854 } |
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2855 } |
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2856 |
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2857 /* |
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2858 * reset current-window |
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2859 */ |
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2860 VIsual_select = old_VIsual_select; |
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2861 VIsual_active = old_VIsual_active; |
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2862 curwin = old_curwin; |
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2863 curbuf = old_curbuf; |
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2864 } |