diff options
Diffstat (limited to 'src/nvim/move.c')
| -rw-r--r-- | src/nvim/move.c | 635 |
1 files changed, 301 insertions, 334 deletions
diff --git a/src/nvim/move.c b/src/nvim/move.c index b3ec3a8e7a..dc2f4b4844 100644 --- a/src/nvim/move.c +++ b/src/nvim/move.c @@ -1,20 +1,19 @@ // This is an open source non-commercial project. Dear PVS-Studio, please check // it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com -/* - * move.c: Functions for moving the cursor and scrolling text. - * - * There are two ways to move the cursor: - * 1. Move the cursor directly, the text is scrolled to keep the cursor in the - * window. - * 2. Scroll the text, the cursor is moved into the text visible in the - * window. - * The 'scrolloff' option makes this a bit complicated. - */ +// move.c: Functions for moving the cursor and scrolling text. +// +// There are two ways to move the cursor: +// 1. Move the cursor directly, the text is scrolled to keep the cursor in the +// window. +// 2. Scroll the text, the cursor is moved into the text visible in the +// window. +// The 'scrolloff' option makes this a bit complicated. #include <assert.h> -#include <inttypes.h> +#include <limits.h> #include <stdbool.h> +#include <stddef.h> #include "nvim/ascii.h" #include "nvim/buffer.h" @@ -23,18 +22,28 @@ #include "nvim/diff.h" #include "nvim/drawscreen.h" #include "nvim/edit.h" +#include "nvim/eval/typval.h" +#include "nvim/eval/typval_defs.h" +#include "nvim/eval/window.h" #include "nvim/fold.h" #include "nvim/getchar.h" +#include "nvim/globals.h" #include "nvim/grid.h" #include "nvim/highlight.h" +#include "nvim/macros.h" #include "nvim/mbyte.h" -#include "nvim/memline.h" +#include "nvim/memline_defs.h" +#include "nvim/mouse.h" #include "nvim/move.h" #include "nvim/option.h" #include "nvim/plines.h" #include "nvim/popupmenu.h" +#include "nvim/pos.h" +#include "nvim/screen.h" #include "nvim/search.h" #include "nvim/strings.h" +#include "nvim/types.h" +#include "nvim/vim.h" #include "nvim/window.h" typedef struct { @@ -47,19 +56,15 @@ typedef struct { # include "move.c.generated.h" #endif -/* - * Compute wp->w_botline for the current wp->w_topline. Can be called after - * wp->w_topline changed. - */ +// Compute wp->w_botline for the current wp->w_topline. Can be called after +// wp->w_topline changed. static void comp_botline(win_T *wp) { linenr_T lnum; int done; - /* - * If w_cline_row is valid, start there. - * Otherwise have to start at w_topline. - */ + // If w_cline_row is valid, start there. + // Otherwise have to start at w_topline. check_cursor_moved(wp); if (wp->w_valid & VALID_CROW) { lnum = wp->w_cursor.lnum; @@ -133,21 +138,7 @@ static void redraw_for_cursorcolumn(win_T *wp) } } -/* - * Update curwin->w_topline and redraw if necessary. - * Used to update the screen before printing a message. - */ -void update_topline_redraw(void) -{ - update_topline(curwin); - if (must_redraw) { - update_screen(0); - } -} - -/* - * Update curwin->w_topline to move the cursor onto the screen. - */ +// Update curwin->w_topline to move the cursor onto the screen. void update_topline(win_T *wp) { linenr_T old_topline; @@ -157,12 +148,16 @@ void update_topline(win_T *wp) long *so_ptr = wp->w_p_so >= 0 ? &wp->w_p_so : &p_so; long save_so = *so_ptr; + // Cursor is updated instead when this is true for 'splitkeep'. + if (skip_update_topline) { + return; + } + // If there is no valid screen and when the window height is zero just use // the cursor line. if (!default_grid.chars || wp->w_height_inner == 0) { wp->w_topline = wp->w_cursor.lnum; wp->w_botline = wp->w_topline; - wp->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; wp->w_viewport_invalid = true; wp->w_scbind_pos = 1; return; @@ -250,14 +245,12 @@ void update_topline(win_T *wp) } } - /* - * If the cursor is below the bottom of the window, scroll the window - * to put the cursor on the window. - * When w_botline is invalid, recompute it first, to avoid a redraw later. - * If w_botline was approximated, we might need a redraw later in a few - * cases, but we don't want to spend (a lot of) time recomputing w_botline - * for every small change. - */ + // If the cursor is below the bottom of the window, scroll the window + // to put the cursor on the window. + // When w_botline is invalid, recompute it first, to avoid a redraw later. + // If w_botline was approximated, we might need a redraw later in a few + // cases, but we don't want to spend (a lot of) time recomputing w_botline + // for every small change. if (check_botline) { if (!(wp->w_valid & VALID_BOTLINE_AP)) { validate_botline(wp); @@ -328,9 +321,7 @@ void update_topline(win_T *wp) wp->w_viewport_invalid = true; win_check_anchored_floats(wp); - /* - * Need to redraw when topline changed. - */ + // Need to redraw when topline changed. if (wp->w_topline != old_topline || wp->w_topfill != old_topfill) { dollar_vcol = -1; @@ -349,22 +340,9 @@ void update_topline(win_T *wp) *so_ptr = save_so; } -/* - * Update win->w_topline to move the cursor onto the screen. - */ -void update_topline_win(win_T *win) -{ - switchwin_T switchwin; - switch_win(&switchwin, win, NULL, true); - update_topline(curwin); - restore_win(&switchwin, true); -} - -/* - * Return the scrolljump value to use for the current window. - * When 'scrolljump' is positive use it as-is. - * When 'scrolljump' is negative use it as a percentage of the window height. - */ +// Return the scrolljump value to use for the current window. +// When 'scrolljump' is positive use it as-is. +// When 'scrolljump' is negative use it as a percentage of the window height. static int scrolljump_value(void) { long result = p_sj >= 0 ? p_sj : (curwin->w_height_inner * -p_sj) / 100; @@ -372,10 +350,8 @@ static int scrolljump_value(void) return (int)result; } -/* - * Return true when there are not 'scrolloff' lines above the cursor for the - * current window. - */ +// Return true when there are not 'scrolloff' lines above the cursor for the +// current window. static bool check_top_offset(void) { long so = get_scrolloff_value(curwin); @@ -403,18 +379,23 @@ static bool check_top_offset(void) return false; } +/// Update w_curswant. +void update_curswant_force(void) +{ + validate_virtcol(); + curwin->w_curswant = curwin->w_virtcol; + curwin->w_set_curswant = false; +} + +/// Update w_curswant if w_set_curswant is set. void update_curswant(void) { if (curwin->w_set_curswant) { - validate_virtcol(); - curwin->w_curswant = curwin->w_virtcol; - curwin->w_set_curswant = false; + update_curswant_force(); } } -/* - * Check if the cursor has moved. Set the w_valid flag accordingly. - */ +// Check if the cursor has moved. Set the w_valid flag accordingly. void check_cursor_moved(win_T *wp) { if (wp->w_cursor.lnum != wp->w_valid_cursor.lnum) { @@ -435,11 +416,9 @@ void check_cursor_moved(win_T *wp) } } -/* - * Call this function when some window settings have changed, which require - * the cursor position, botline and topline to be recomputed and the window to - * be redrawn. E.g, when changing the 'wrap' option or folding. - */ +// Call this function when some window settings have changed, which require +// the cursor position, botline and topline to be recomputed and the window to +// be redrawn. E.g, when changing the 'wrap' option or folding. void changed_window_setting(void) { changed_window_setting_win(curwin); @@ -453,9 +432,7 @@ void changed_window_setting_win(win_T *wp) redraw_later(wp, UPD_NOT_VALID); } -/* - * Set wp->w_topline to a certain number. - */ +// Set wp->w_topline to a certain number. void set_topline(win_T *wp, linenr_T lnum) { linenr_T prev_topline = wp->w_topline; @@ -475,11 +452,9 @@ void set_topline(win_T *wp, linenr_T lnum) redraw_later(wp, UPD_VALID); } -/* - * Call this function when the length of the cursor line (in screen - * characters) has changed, and the change is before the cursor. - * Need to take care of w_botline separately! - */ +// Call this function when the length of the cursor line (in screen +// characters) has changed, and the change is before the cursor. +// Need to take care of w_botline separately! void changed_cline_bef_curs(void) { curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL @@ -492,11 +467,9 @@ void changed_cline_bef_curs_win(win_T *wp) |VALID_CHEIGHT|VALID_TOPLINE); } -/* - * Call this function when the length of a line (in screen characters) above - * the cursor have changed. - * Need to take care of w_botline separately! - */ +// Call this function when the length of a line (in screen characters) above +// the cursor have changed. +// Need to take care of w_botline separately! void changed_line_abv_curs(void) { curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW @@ -509,9 +482,7 @@ void changed_line_abv_curs_win(win_T *wp) |VALID_CHEIGHT|VALID_TOPLINE); } -/* - * Make sure the value of curwin->w_botline is valid. - */ +// Make sure the value of curwin->w_botline is valid. void validate_botline(win_T *wp) { if (!(wp->w_valid & VALID_BOTLINE)) { @@ -519,9 +490,7 @@ void validate_botline(win_T *wp) } } -/* - * Mark curwin->w_botline as invalid (because of some change in the buffer). - */ +// Mark curwin->w_botline as invalid (because of some change in the buffer). void invalidate_botline(void) { curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); @@ -537,9 +506,7 @@ void approximate_botline_win(win_T *wp) wp->w_valid &= ~VALID_BOTLINE; } -/* - * Return true if curwin->w_wrow and curwin->w_wcol are valid. - */ +// Return true if curwin->w_wrow and curwin->w_wcol are valid. int cursor_valid(void) { check_cursor_moved(curwin); @@ -547,10 +514,8 @@ int cursor_valid(void) (VALID_WROW|VALID_WCOL); } -/* - * Validate cursor position. Makes sure w_wrow and w_wcol are valid. - * w_topline must be valid, you may need to call update_topline() first! - */ +// Validate cursor position. Makes sure w_wrow and w_wcol are valid. +// w_topline must be valid, you may need to call update_topline() first! void validate_cursor(void) { check_cursor_moved(curwin); @@ -559,10 +524,8 @@ void validate_cursor(void) } } -/* - * Compute wp->w_cline_row and wp->w_cline_height, based on the current value - * of wp->w_topline. - */ +// Compute wp->w_cline_row and wp->w_cline_height, based on the current value +// of wp->w_topline. static void curs_rows(win_T *wp) { // Check if wp->w_lines[].wl_size is invalid @@ -633,77 +596,77 @@ static void curs_rows(win_T *wp) wp->w_valid |= VALID_CROW|VALID_CHEIGHT; } -/* - * Validate curwin->w_virtcol only. - */ +// Validate curwin->w_virtcol only. void validate_virtcol(void) { validate_virtcol_win(curwin); } -/* - * Validate wp->w_virtcol only. - */ +// Validate wp->w_virtcol only. void validate_virtcol_win(win_T *wp) { check_cursor_moved(wp); - if (!(wp->w_valid & VALID_VIRTCOL)) { - getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL); - redraw_for_cursorcolumn(wp); - wp->w_valid |= VALID_VIRTCOL; + + if (wp->w_valid & VALID_VIRTCOL) { + return; } + + getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL); + redraw_for_cursorcolumn(wp); + wp->w_valid |= VALID_VIRTCOL; } -/* - * Validate curwin->w_cline_height only. - */ +// Validate curwin->w_cline_height only. void validate_cheight(void) { check_cursor_moved(curwin); - if (!(curwin->w_valid & VALID_CHEIGHT)) { - curwin->w_cline_height = plines_win_full(curwin, curwin->w_cursor.lnum, - NULL, &curwin->w_cline_folded, - true); - curwin->w_valid |= VALID_CHEIGHT; + + if (curwin->w_valid & VALID_CHEIGHT) { + return; } + + curwin->w_cline_height = plines_win_full(curwin, curwin->w_cursor.lnum, + NULL, &curwin->w_cline_folded, + true); + curwin->w_valid |= VALID_CHEIGHT; } -/* - * Validate w_wcol and w_virtcol only. - */ +// Validate w_wcol and w_virtcol only. void validate_cursor_col(void) { validate_virtcol(); - if (!(curwin->w_valid & VALID_WCOL)) { - colnr_T col = curwin->w_virtcol; - colnr_T off = curwin_col_off(); - col += off; - int width = curwin->w_width_inner - off + curwin_col_off2(); - - // long line wrapping, adjust curwin->w_wrow - if (curwin->w_p_wrap && col >= (colnr_T)curwin->w_width_inner - && width > 0) { - // use same formula as what is used in curs_columns() - col -= ((col - curwin->w_width_inner) / width + 1) * width; - } - if (col > (int)curwin->w_leftcol) { - col -= curwin->w_leftcol; - } else { - col = 0; - } - curwin->w_wcol = col; - curwin->w_valid |= VALID_WCOL; + if (curwin->w_valid & VALID_WCOL) { + return; + } + + colnr_T col = curwin->w_virtcol; + colnr_T off = curwin_col_off(); + col += off; + int width = curwin->w_width_inner - off + curwin_col_off2(); + + // long line wrapping, adjust curwin->w_wrow + if (curwin->w_p_wrap && col >= (colnr_T)curwin->w_width_inner + && width > 0) { + // use same formula as what is used in curs_columns() + col -= ((col - curwin->w_width_inner) / width + 1) * width; + } + if (col > (int)curwin->w_leftcol) { + col -= curwin->w_leftcol; + } else { + col = 0; } + curwin->w_wcol = col; + + curwin->w_valid |= VALID_WCOL; } -/* - * Compute offset of a window, occupied by absolute or relative line number, - * fold column and sign column (these don't move when scrolling horizontally). - */ +// Compute offset of a window, occupied by absolute or relative line number, +// fold column and sign column (these don't move when scrolling horizontally). int win_col_off(win_T *wp) { - return ((wp->w_p_nu || wp->w_p_rnu) ? number_width(wp) + 1 : 0) + return ((wp->w_p_nu || wp->w_p_rnu || (*wp->w_p_stc != NUL)) ? + (number_width(wp) + (*wp->w_p_stc == NUL)) : 0) + (cmdwin_type == 0 || wp != curwin ? 0 : 1) + win_fdccol_count(wp) + (win_signcol_count(wp) * win_signcol_width(wp)); @@ -714,11 +677,9 @@ int curwin_col_off(void) return win_col_off(curwin); } -/* - * Return the difference in column offset for the second screen line of a - * wrapped line. It's 8 if 'number' or 'relativenumber' is on and 'n' is in - * 'cpoptions'. - */ +// Return the difference in column offset for the second screen line of a +// wrapped line. It's 8 if 'number' or 'relativenumber' is on and 'n' is in +// 'cpoptions'. int win_col_off2(win_T *wp) { if ((wp->w_p_nu || wp->w_p_rnu) && vim_strchr(p_cpo, CPO_NUMCOL) != NULL) { @@ -746,9 +707,7 @@ void curs_columns(win_T *wp, int may_scroll) long so = get_scrolloff_value(wp); long siso = get_sidescrolloff_value(wp); - /* - * First make sure that w_topline is valid (after moving the cursor). - */ + // First make sure that w_topline is valid (after moving the cursor). update_topline(wp); // Next make sure that w_cline_row is valid. @@ -756,9 +715,7 @@ void curs_columns(win_T *wp, int may_scroll) curs_rows(wp); } - /* - * Compute the number of virtual columns. - */ + // Compute the number of virtual columns. if (wp->w_cline_folded) { // In a folded line the cursor is always in the first column startcol = wp->w_virtcol = endcol = wp->w_leftcol; @@ -871,8 +828,7 @@ void curs_columns(win_T *wp, int may_scroll) if ((wp->w_wrow >= wp->w_height_inner || ((prev_skipcol > 0 || wp->w_wrow + so >= wp->w_height_inner) - && (plines = - plines_win_nofill(wp, wp->w_cursor.lnum, false)) - 1 + && (plines = plines_win_nofill(wp, wp->w_cursor.lnum, false)) - 1 >= wp->w_height_inner)) && wp->w_height_inner != 0 && wp->w_cursor.lnum == wp->w_topline @@ -980,11 +936,16 @@ void textpos2screenpos(win_T *wp, pos_T *pos, int *rowp, int *scolp, int *ccolp, int rowoff = 0; colnr_T coloff = 0; bool visible_row = false; - - if (pos->lnum >= wp->w_topline && pos->lnum < wp->w_botline) { - row = plines_m_win(wp, wp->w_topline, pos->lnum - 1) + 1; + bool is_folded = false; + + if (pos->lnum >= wp->w_topline && pos->lnum <= wp->w_botline) { + linenr_T lnum = pos->lnum; + is_folded = hasFoldingWin(wp, lnum, &lnum, NULL, true, NULL); + row = plines_m_win(wp, wp->w_topline, lnum - 1) + 1; + // Add filler lines above this buffer line. + row += win_get_fill(wp, lnum); visible_row = true; - } else if (pos->lnum < wp->w_topline) { + } else if (!local || pos->lnum < wp->w_topline) { row = 0; } else { row = wp->w_height_inner; @@ -993,46 +954,108 @@ void textpos2screenpos(win_T *wp, pos_T *pos, int *rowp, int *scolp, int *ccolp, bool existing_row = (pos->lnum > 0 && pos->lnum <= wp->w_buffer->b_ml.ml_line_count); - if ((local && existing_row) || visible_row) { - colnr_T off; - colnr_T col; - int width; - - getvcol(wp, pos, &scol, &ccol, &ecol); - - // similar to what is done in validate_cursor_col() - col = scol; - off = win_col_off(wp); - col += off; - width = wp->w_width - off + win_col_off2(wp); - - // long line wrapping, adjust row - if (wp->w_p_wrap && col >= (colnr_T)wp->w_width && width > 0) { - // use same formula as what is used in curs_columns() - rowoff = visible_row ? ((col - wp->w_width) / width + 1) : 0; - col -= rowoff * width; - } + if ((local || visible_row) && existing_row) { + const colnr_T off = win_col_off(wp); + if (is_folded) { + row += local ? 0 : wp->w_winrow + wp->w_winrow_off; + coloff = (local ? 0 : wp->w_wincol + wp->w_wincol_off) + 1 + off; + } else { + getvcol(wp, pos, &scol, &ccol, &ecol); + + // similar to what is done in validate_cursor_col() + colnr_T col = scol; + col += off; + int width = wp->w_width - off + win_col_off2(wp); + + // long line wrapping, adjust row + if (wp->w_p_wrap && col >= (colnr_T)wp->w_width && width > 0) { + // use same formula as what is used in curs_columns() + rowoff = visible_row ? ((col - wp->w_width) / width + 1) : 0; + col -= rowoff * width; + } - col -= wp->w_leftcol; + col -= wp->w_leftcol; - if (col >= 0 && col < wp->w_width) { - coloff = col - scol + (local ? 0 : wp->w_wincol + wp->w_wincol_off) + 1; - } else { - scol = ccol = ecol = 0; - // character is left or right of the window - if (local) { - coloff = col < 0 ? -1 : wp->w_width_inner + 1; + if (col >= 0 && col < wp->w_width && row + rowoff <= wp->w_height) { + coloff = col - scol + (local ? 0 : wp->w_wincol + wp->w_wincol_off) + 1; + row += local ? 0 : wp->w_winrow + wp->w_winrow_off; } else { - row = 0; + // character is left, right or below of the window + scol = ccol = ecol = 0; + if (local) { + coloff = col < 0 ? -1 : wp->w_width_inner + 1; + } else { + row = rowoff = 0; + } } } } - *rowp = (local ? 0 : wp->w_winrow + wp->w_winrow_off) + row + rowoff; + *rowp = row + rowoff; *scolp = scol + coloff; *ccolp = ccol + coloff; *ecolp = ecol + coloff; } +/// "screenpos({winid}, {lnum}, {col})" function +void f_screenpos(typval_T *argvars, typval_T *rettv, EvalFuncData fptr) +{ + tv_dict_alloc_ret(rettv); + dict_T *dict = rettv->vval.v_dict; + + win_T *wp = find_win_by_nr_or_id(&argvars[0]); + if (wp == NULL) { + return; + } + + pos_T pos = { + .lnum = (linenr_T)tv_get_number(&argvars[1]), + .col = (colnr_T)tv_get_number(&argvars[2]) - 1, + .coladd = 0 + }; + if (pos.lnum > wp->w_buffer->b_ml.ml_line_count) { + semsg(_(e_invalid_line_number_nr), pos.lnum); + return; + } + int row = 0; + int scol = 0, ccol = 0, ecol = 0; + textpos2screenpos(wp, &pos, &row, &scol, &ccol, &ecol, false); + + tv_dict_add_nr(dict, S_LEN("row"), row); + tv_dict_add_nr(dict, S_LEN("col"), scol); + tv_dict_add_nr(dict, S_LEN("curscol"), ccol); + tv_dict_add_nr(dict, S_LEN("endcol"), ecol); +} + +/// "virtcol2col({winid}, {lnum}, {col})" function +void f_virtcol2col(typval_T *argvars, typval_T *rettv, EvalFuncData fptr) +{ + rettv->vval.v_number = -1; + + if (tv_check_for_number_arg(argvars, 0) == FAIL + || tv_check_for_number_arg(argvars, 1) == FAIL + || tv_check_for_number_arg(argvars, 2) == FAIL) { + return; + } + + win_T *wp = find_win_by_nr_or_id(&argvars[0]); + if (wp == NULL) { + return; + } + + bool error = false; + linenr_T lnum = (linenr_T)tv_get_number_chk(&argvars[1], &error); + if (error || lnum < 0 || lnum > wp->w_buffer->b_ml.ml_line_count) { + return; + } + + int screencol = (int)tv_get_number_chk(&argvars[2], &error); + if (error || screencol < 0) { + return; + } + + rettv->vval.v_number = vcol2col(wp, lnum, screencol); +} + /// Scroll the current window down by "line_count" logical lines. "CTRL-Y" /// /// @param line_count number of lines to scroll @@ -1079,10 +1102,8 @@ bool scrolldown(long line_count, int byfold) } check_topfill(curwin, true); - /* - * Compute the row number of the last row of the cursor line - * and move the cursor onto the displayed part of the window. - */ + // Compute the row number of the last row of the cursor line + // and move the cursor onto the displayed part of the window. int wrow = curwin->w_wrow; if (curwin->w_p_wrap && curwin->w_width_inner != 0) { validate_virtcol(); @@ -1200,10 +1221,8 @@ void check_topfill(win_T *wp, bool down) win_check_anchored_floats(curwin); } -/* - * Use as many filler lines as possible for w_topline. Make sure w_topline - * is still visible. - */ +// Use as many filler lines as possible for w_topline. Make sure w_topline +// is still visible. static void max_topfill(void) { int n = plines_win_nofill(curwin, curwin->w_topline, true); @@ -1217,10 +1236,8 @@ static void max_topfill(void) } } -/* - * Scroll the screen one line down, but don't do it if it would move the - * cursor off the screen. - */ +// Scroll the screen one line down, but don't do it if it would move the +// cursor off the screen. void scrolldown_clamp(void) { int can_fill = (curwin->w_topfill < win_get_fill(curwin, curwin->w_topline)); @@ -1261,10 +1278,8 @@ void scrolldown_clamp(void) } } -/* - * Scroll the screen one line up, but don't do it if it would move the cursor - * off the screen. - */ +// Scroll the screen one line up, but don't do it if it would move the cursor +// off the screen. void scrollup_clamp(void) { if (curwin->w_topline == curbuf->b_ml.ml_line_count @@ -1296,12 +1311,10 @@ void scrollup_clamp(void) } } -/* - * Add one line above "lp->lnum". This can be a filler line, a closed fold or - * a (wrapped) text line. Uses and sets "lp->fill". - * Returns the height of the added line in "lp->height". - * Lines above the first one are incredibly high: MAXCOL. - */ +// Add one line above "lp->lnum". This can be a filler line, a closed fold or +// a (wrapped) text line. Uses and sets "lp->fill". +// Returns the height of the added line in "lp->height". +// Lines above the first one are incredibly high: MAXCOL. static void topline_back(win_T *wp, lineoff_T *lp) { if (lp->fill < win_get_fill(wp, lp->lnum)) { @@ -1322,12 +1335,10 @@ static void topline_back(win_T *wp, lineoff_T *lp) } } -/* - * Add one line below "lp->lnum". This can be a filler line, a closed fold or - * a (wrapped) text line. Uses and sets "lp->fill". - * Returns the height of the added line in "lp->height". - * Lines below the last one are incredibly high. - */ +// Add one line below "lp->lnum". This can be a filler line, a closed fold or +// a (wrapped) text line. Uses and sets "lp->fill". +// Returns the height of the added line in "lp->height". +// Lines below the last one are incredibly high. static void botline_forw(win_T *wp, lineoff_T *lp) { if (lp->fill < win_get_fill(wp, lp->lnum + 1)) { @@ -1349,11 +1360,9 @@ static void botline_forw(win_T *wp, lineoff_T *lp) } } -/* - * Switch from including filler lines below lp->lnum to including filler - * lines above loff.lnum + 1. This keeps pointing to the same line. - * When there are no filler lines nothing changes. - */ +// Switch from including filler lines below lp->lnum to including filler +// lines above loff.lnum + 1. This keeps pointing to the same line. +// When there are no filler lines nothing changes. static void botline_topline(lineoff_T *lp) { if (lp->fill > 0) { @@ -1362,11 +1371,9 @@ static void botline_topline(lineoff_T *lp) } } -/* - * Switch from including filler lines above lp->lnum to including filler - * lines below loff.lnum - 1. This keeps pointing to the same line. - * When there are no filler lines nothing changes. - */ +// Switch from including filler lines above lp->lnum to including filler +// lines below loff.lnum - 1. This keeps pointing to the same line. +// When there are no filler lines nothing changes. static void topline_botline(lineoff_T *lp) { if (lp->fill > 0) { @@ -1375,11 +1382,9 @@ static void topline_botline(lineoff_T *lp) } } -/* - * Recompute topline to put the cursor at the top of the window. - * Scroll at least "min_scroll" lines. - * If "always" is true, always set topline (for "zt"). - */ +// Recompute topline to put the cursor at the top of the window. +// Scroll at least "min_scroll" lines. +// If "always" is true, always set topline (for "zt"). void scroll_cursor_top(int min_scroll, int always) { int scrolled = 0; @@ -1394,13 +1399,11 @@ void scroll_cursor_top(int min_scroll, int always) off = mouse_dragging - 1; } - /* - * Decrease topline until: - * - it has become 1 - * - (part of) the cursor line is moved off the screen or - * - moved at least 'scrolljump' lines and - * - at least 'scrolloff' lines above and below the cursor - */ + // Decrease topline until: + // - it has become 1 + // - (part of) the cursor line is moved off the screen or + // - moved at least 'scrolljump' lines and + // - at least 'scrolloff' lines above and below the cursor validate_cheight(); int used = curwin->w_cline_height; // includes filler lines above if (curwin->w_cursor.lnum < curwin->w_topline) { @@ -1421,10 +1424,8 @@ void scroll_cursor_top(int min_scroll, int always) // Hide filler lines above cursor line by adding them to "extra". int extra = win_get_fill(curwin, curwin->w_cursor.lnum); - /* - * Check if the lines from "top" to "bot" fit in the window. If they do, - * set new_topline and advance "top" and "bot" to include more lines. - */ + // Check if the lines from "top" to "bot" fit in the window. If they do, + // set new_topline and advance "top" and "bot" to include more lines. while (top > 0) { int i = hasFolding(top, &top, NULL) ? 1 // count one logical line for a sequence of folded lines @@ -1445,9 +1446,7 @@ void scroll_cursor_top(int min_scroll, int always) scrolled += i; } - /* - * If scrolling is needed, scroll at least 'sj' lines. - */ + // If scrolling is needed, scroll at least 'sj' lines. if ((new_topline >= curwin->w_topline || scrolled > min_scroll) && extra >= off) { break; @@ -1459,18 +1458,14 @@ void scroll_cursor_top(int min_scroll, int always) bot++; } - /* - * If we don't have enough space, put cursor in the middle. - * This makes sure we get the same position when using "k" and "j" - * in a small window. - */ + // If we don't have enough space, put cursor in the middle. + // This makes sure we get the same position when using "k" and "j" + // in a small window. if (used > curwin->w_height_inner) { scroll_cursor_halfway(false); } else { - /* - * If "always" is false, only adjust topline to a lower value, higher - * value may happen with wrapping lines - */ + // If "always" is false, only adjust topline to a lower value, higher + // value may happen with wrapping lines if (new_topline < curwin->w_topline || always) { curwin->w_topline = new_topline; } @@ -1495,10 +1490,8 @@ void scroll_cursor_top(int min_scroll, int always) } } -/* - * Set w_empty_rows and w_filler_rows for window "wp", having used up "used" - * screen lines for text lines. - */ +// Set w_empty_rows and w_filler_rows for window "wp", having used up "used" +// screen lines for text lines. void set_empty_rows(win_T *wp, int used) { wp->w_filler_rows = 0; @@ -1577,13 +1570,11 @@ void scroll_cursor_bot(int min_scroll, int set_topbot) } } - /* - * Stop counting lines to scroll when - * - hitting start of the file - * - scrolled nothing or at least 'sj' lines - * - at least 'so' lines below the cursor - * - lines between botline and cursor have been counted - */ + // Stop counting lines to scroll when + // - hitting start of the file + // - scrolled nothing or at least 'sj' lines + // - at least 'so' lines below the cursor + // - lines between botline and cursor have been counted if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum)) { loff.lnum = cln; boff.lnum = cln; @@ -1673,21 +1664,17 @@ void scroll_cursor_bot(int min_scroll, int set_topbot) } } - /* - * Scroll up if the cursor is off the bottom of the screen a bit. - * Otherwise put it at 1/2 of the screen. - */ + // Scroll up if the cursor is off the bottom of the screen a bit. + // Otherwise put it at 1/2 of the screen. if (line_count >= curwin->w_height_inner && line_count > min_scroll) { scroll_cursor_halfway(false); } else { scrollup(line_count, true); } - /* - * If topline didn't change we need to restore w_botline and w_empty_rows - * (we changed them). - * If topline did change, update_screen() will set botline. - */ + // If topline didn't change we need to restore w_botline and w_empty_rows + // (we changed them). + // If topline did change, update_screen() will set botline. if (curwin->w_topline == old_topline && set_topbot) { curwin->w_botline = old_botline; curwin->w_empty_rows = old_empty_rows; @@ -1760,18 +1747,14 @@ void scroll_cursor_halfway(int atend) curwin->w_valid |= VALID_TOPLINE; } -/* - * Correct the cursor position so that it is in a part of the screen at least - * 'so' lines from the top and bottom, if possible. - * If not possible, put it at the same position as scroll_cursor_halfway(). - * When called topline must be valid! - */ +// Correct the cursor position so that it is in a part of the screen at least +// 'so' lines from the top and bottom, if possible. +// If not possible, put it at the same position as scroll_cursor_halfway(). +// When called topline must be valid! void cursor_correct(void) { - /* - * How many lines we would like to have above/below the cursor depends on - * whether the first/last line of the file is on screen. - */ + // How many lines we would like to have above/below the cursor depends on + // whether the first/last line of the file is on screen. int above_wanted = (int)get_scrolloff_value(curwin); int below_wanted = (int)get_scrolloff_value(curwin); if (mouse_dragging > 0) { @@ -1795,10 +1778,8 @@ void cursor_correct(void) } } - /* - * If there are sufficient file-lines above and below the cursor, we can - * return now. - */ + // If there are sufficient file-lines above and below the cursor, we can + // return now. linenr_T cln = curwin->w_cursor.lnum; // Cursor Line Number if (cln >= curwin->w_topline + above_wanted && cln < curwin->w_botline - below_wanted @@ -1806,12 +1787,10 @@ void cursor_correct(void) return; } - /* - * Narrow down the area where the cursor can be put by taking lines from - * the top and the bottom until: - * - the desired context lines are found - * - the lines from the top is past the lines from the bottom - */ + // Narrow down the area where the cursor can be put by taking lines from + // the top and the bottom until: + // - the desired context lines are found + // - the lines from the top is past the lines from the bottom linenr_T topline = curwin->w_topline; linenr_T botline = curwin->w_botline - 1; // count filler lines as context @@ -1860,11 +1839,9 @@ void cursor_correct(void) curwin->w_viewport_invalid = true; } -/* - * move screen 'count' pages up or down and update screen - * - * return FAIL for failure, OK otherwise - */ +// move screen 'count' pages up or down and update screen +// +// return FAIL for failure, OK otherwise int onepage(Direction dir, long count) { long n; @@ -2044,18 +2021,16 @@ int onepage(Direction dir, long count) return retval; } -/* - * Decide how much overlap to use for page-up or page-down scrolling. - * This is symmetric, so that doing both keeps the same lines displayed. - * Three lines are examined: - * - * before CTRL-F after CTRL-F / before CTRL-B - * etc. l1 - * l1 last but one line ------------ - * l2 last text line l2 top text line - * ------------- l3 second text line - * l3 etc. - */ +// Decide how much overlap to use for page-up or page-down scrolling. +// This is symmetric, so that doing both keeps the same lines displayed. +// Three lines are examined: +// +// before CTRL-F after CTRL-F / before CTRL-B +// etc. l1 +// l1 last but one line ------------ +// l2 last text line l2 top text line +// ------------- l3 second text line +// l3 etc. static void get_scroll_overlap(lineoff_T *lp, int dir) { int min_height = curwin->w_height_inner - 2; @@ -2125,9 +2100,7 @@ void halfpage(bool flag, linenr_T Prenum) validate_botline(curwin); int room = curwin->w_empty_rows + curwin->w_filler_rows; if (flag) { - /* - * scroll the text up - */ + // scroll the text up while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count) { if (curwin->w_topfill > 0) { i = 1; @@ -2185,9 +2158,7 @@ void halfpage(bool flag, linenr_T Prenum) check_cursor_lnum(); } } else { - /* - * scroll the text down - */ + // scroll the text down while (n > 0 && curwin->w_topline > 1) { if (curwin->w_topfill < win_get_fill(curwin, curwin->w_topline)) { i = 1; @@ -2247,9 +2218,7 @@ void do_check_cursorbind(void) int old_VIsual_select = VIsual_select; int old_VIsual_active = VIsual_active; - /* - * loop through the cursorbound windows - */ + // loop through the cursorbound windows VIsual_select = VIsual_active = 0; FOR_ALL_WINDOWS_IN_TAB(wp, curtab) { curwin = wp; @@ -2294,9 +2263,7 @@ void do_check_cursorbind(void) } } - /* - * reset current-window - */ + // reset current-window VIsual_select = old_VIsual_select; VIsual_active = old_VIsual_active; curwin = old_curwin; |