Introduce nvim namespace: Move files.

Move files from src/ to src/nvim/.
- src/nvim/ becomes the new root dir for nvim executable sources.
- src/libnvim/ is planned to become root dir of the neovim library.

1 files changed, 0 insertions, 2242 deletions

diff --git a/src/move.c b/src/move.c
deleted file mode 100644
index f234d968a6..0000000000
--- a/src/move.c
+++ /dev/null
@@ -1,2242 +0,0 @@
-/*
- * VIM - Vi IMproved	by Bram Moolenaar
- *
- * Do ":help uganda"  in Vim to read copying and usage conditions.
- * Do ":help credits" in Vim to see a list of people who contributed.
- * See README.txt for an overview of the Vim source code.
- */
-/*
- * 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 "vim.h"
-#include "move.h"
-#include "charset.h"
-#include "diff.h"
-#include "edit.h"
-#include "fold.h"
-#include "mbyte.h"
-#include "memline.h"
-#include "misc1.h"
-#include "misc2.h"
-#include "popupmnu.h"
-#include "screen.h"
-
-static void comp_botline(win_T *wp);
-static void redraw_for_cursorline(win_T *wp);
-static int scrolljump_value(void);
-static int check_top_offset(void);
-static void curs_rows(win_T *wp, int do_botline);
-static void validate_botline_win(win_T *wp);
-static void validate_cheight(void);
-
-typedef struct {
-  linenr_T lnum;                /* line number */
-  int fill;                     /* filler lines */
-  int height;                   /* height of added line */
-} lineoff_T;
-
-static void topline_back(lineoff_T *lp);
-static void botline_forw(lineoff_T *lp);
-static void botline_topline(lineoff_T *lp);
-static void topline_botline(lineoff_T *lp);
-static void max_topfill(void);
-
-/*
- * 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)
-{
-  int n;
-  linenr_T lnum;
-  int done;
-  linenr_T last;
-  int folded;
-
-  /*
-   * 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;
-    done = wp->w_cline_row;
-  } else {
-    lnum = wp->w_topline;
-    done = 0;
-  }
-
-  for (; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum) {
-    last = lnum;
-    folded = FALSE;
-    if (hasFoldingWin(wp, lnum, NULL, &last, TRUE, NULL)) {
-      n = 1;
-      folded = TRUE;
-    } else if (lnum == wp->w_topline)
-      n = plines_win_nofill(wp, lnum, TRUE) + wp->w_topfill;
-    else
-      n = plines_win(wp, lnum, TRUE);
-    if (
-      lnum <= wp->w_cursor.lnum && last >= wp->w_cursor.lnum
-      ) {
-      wp->w_cline_row = done;
-      wp->w_cline_height = n;
-      wp->w_cline_folded = folded;
-      redraw_for_cursorline(wp);
-      wp->w_valid |= (VALID_CROW|VALID_CHEIGHT);
-    }
-    if (done + n > wp->w_height)
-      break;
-    done += n;
-    lnum = last;
-  }
-
-  /* wp->w_botline is the line that is just below the window */
-  wp->w_botline = lnum;
-  wp->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
-
-  set_empty_rows(wp, done);
-}
-
-/*
-* Redraw when w_cline_row changes and 'relativenumber' or 'cursorline' is
-* set.
-*/
-static void redraw_for_cursorline(win_T *wp)
-{
-  if ((wp->w_p_rnu || wp->w_p_cul)
-      && (wp->w_valid & VALID_CROW) == 0
-      && !pum_visible()) {
-    redraw_win_later(wp, SOME_VALID);
-  }
-}
-
-/*
- * Update curwin->w_topline and redraw if necessary.
- * Used to update the screen before printing a message.
- */
-void update_topline_redraw(void)
-{
-  update_topline();
-  if (must_redraw)
-    update_screen(0);
-}
-
-/*
- * Update curwin->w_topline to move the cursor onto the screen.
- */
-void update_topline(void)
-{
-  long line_count;
-  int halfheight;
-  int n;
-  linenr_T old_topline;
-  int old_topfill;
-  linenr_T lnum;
-  int check_topline = FALSE;
-  int check_botline = FALSE;
-  int save_so = p_so;
-
-  if (!screen_valid(TRUE))
-    return;
-
-  check_cursor_moved(curwin);
-  if (curwin->w_valid & VALID_TOPLINE)
-    return;
-
-  /* When dragging with the mouse, don't scroll that quickly */
-  if (mouse_dragging > 0)
-    p_so = mouse_dragging - 1;
-
-  old_topline = curwin->w_topline;
-  old_topfill = curwin->w_topfill;
-
-  /*
-   * If the buffer is empty, always set topline to 1.
-   */
-  if (bufempty()) {             /* special case - file is empty */
-    if (curwin->w_topline != 1)
-      redraw_later(NOT_VALID);
-    curwin->w_topline = 1;
-    curwin->w_botline = 2;
-    curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
-    curwin->w_scbind_pos = 1;
-  }
-  /*
-   * If the cursor is above or near the top of the window, scroll the window
-   * to show the line the cursor is in, with 'scrolloff' context.
-   */
-  else {
-    if (curwin->w_topline > 1) {
-      /* If the cursor is above topline, scrolling is always needed.
-       * If the cursor is far below topline and there is no folding,
-       * scrolling down is never needed. */
-      if (curwin->w_cursor.lnum < curwin->w_topline)
-        check_topline = TRUE;
-      else if (check_top_offset())
-        check_topline = TRUE;
-    }
-    /* Check if there are more filler lines than allowed. */
-    if (!check_topline && curwin->w_topfill > diff_check_fill(curwin,
-            curwin->w_topline))
-      check_topline = TRUE;
-
-    if (check_topline) {
-      halfheight = curwin->w_height / 2 - 1;
-      if (halfheight < 2)
-        halfheight = 2;
-
-      if (hasAnyFolding(curwin)) {
-        /* Count the number of logical lines between the cursor and
-         * topline + p_so (approximation of how much will be
-         * scrolled). */
-        n = 0;
-        for (lnum = curwin->w_cursor.lnum;
-             lnum < curwin->w_topline + p_so; ++lnum) {
-          ++n;
-          /* stop at end of file or when we know we are far off */
-          if (lnum >= curbuf->b_ml.ml_line_count || n >= halfheight)
-            break;
-          (void)hasFolding(lnum, NULL, &lnum);
-        }
-      } else
-        n = curwin->w_topline + p_so - curwin->w_cursor.lnum;
-
-      /* If we weren't very close to begin with, we scroll to put the
-       * cursor in the middle of the window.  Otherwise put the cursor
-       * near the top of the window. */
-      if (n >= halfheight)
-        scroll_cursor_halfway(FALSE);
-      else {
-        scroll_cursor_top(scrolljump_value(), FALSE);
-        check_botline = TRUE;
-      }
-    } else {
-      /* Make sure topline is the first line of a fold. */
-      (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
-      check_botline = TRUE;
-    }
-  }
-
-  /*
-   * 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 (!(curwin->w_valid & VALID_BOTLINE_AP))
-      validate_botline();
-
-    if (curwin->w_botline <= curbuf->b_ml.ml_line_count) {
-      if (curwin->w_cursor.lnum < curwin->w_botline) {
-        if (((long)curwin->w_cursor.lnum
-             >= (long)curwin->w_botline - p_so
-             || hasAnyFolding(curwin)
-             )) {
-          lineoff_T loff;
-
-          /* Cursor is (a few lines) above botline, check if there are
-           * 'scrolloff' window lines below the cursor.  If not, need to
-           * scroll. */
-          n = curwin->w_empty_rows;
-          loff.lnum = curwin->w_cursor.lnum;
-          /* In a fold go to its last line. */
-          (void)hasFolding(loff.lnum, NULL, &loff.lnum);
-          loff.fill = 0;
-          n += curwin->w_filler_rows;
-          loff.height = 0;
-          while (loff.lnum < curwin->w_botline
-                 && (loff.lnum + 1 < curwin->w_botline || loff.fill == 0)
-                 ) {
-            n += loff.height;
-            if (n >= p_so)
-              break;
-            botline_forw(&loff);
-          }
-          if (n >= p_so)
-            /* sufficient context, no need to scroll */
-            check_botline = FALSE;
-        } else
-          /* sufficient context, no need to scroll */
-          check_botline = FALSE;
-      }
-      if (check_botline) {
-        if (hasAnyFolding(curwin)) {
-          /* Count the number of logical lines between the cursor and
-           * botline - p_so (approximation of how much will be
-           * scrolled). */
-          line_count = 0;
-          for (lnum = curwin->w_cursor.lnum;
-               lnum >= curwin->w_botline - p_so; --lnum) {
-            ++line_count;
-            /* stop at end of file or when we know we are far off */
-            if (lnum <= 0 || line_count > curwin->w_height + 1)
-              break;
-            (void)hasFolding(lnum, &lnum, NULL);
-          }
-        } else
-          line_count = curwin->w_cursor.lnum - curwin->w_botline
-                       + 1 + p_so;
-        if (line_count <= curwin->w_height + 1)
-          scroll_cursor_bot(scrolljump_value(), FALSE);
-        else
-          scroll_cursor_halfway(FALSE);
-      }
-    }
-  }
-  curwin->w_valid |= VALID_TOPLINE;
-
-  /*
-   * Need to redraw when topline changed.
-   */
-  if (curwin->w_topline != old_topline
-      || curwin->w_topfill != old_topfill
-      ) {
-    dollar_vcol = -1;
-    if (curwin->w_skipcol != 0) {
-      curwin->w_skipcol = 0;
-      redraw_later(NOT_VALID);
-    } else
-      redraw_later(VALID);
-    /* May need to set w_skipcol when cursor in w_topline. */
-    if (curwin->w_cursor.lnum == curwin->w_topline)
-      validate_cursor();
-  }
-
-  p_so = save_so;
-}
-
-/*
- * 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)
-{
-  if (p_sj >= 0)
-    return (int)p_sj;
-  return (curwin->w_height * -p_sj) / 100;
-}
-
-/*
- * Return TRUE when there are not 'scrolloff' lines above the cursor for the
- * current window.
- */
-static int check_top_offset(void)
-{
-  lineoff_T loff;
-  int n;
-
-  if (curwin->w_cursor.lnum < curwin->w_topline + p_so
-      || hasAnyFolding(curwin)
-      ) {
-    loff.lnum = curwin->w_cursor.lnum;
-    loff.fill = 0;
-    n = curwin->w_topfill;          /* always have this context */
-    /* Count the visible screen lines above the cursor line. */
-    while (n < p_so) {
-      topline_back(&loff);
-      /* Stop when included a line above the window. */
-      if (loff.lnum < curwin->w_topline
-          || (loff.lnum == curwin->w_topline && loff.fill > 0)
-          )
-        break;
-      n += loff.height;
-    }
-    if (n < p_so)
-      return TRUE;
-  }
-  return FALSE;
-}
-
-void update_curswant(void)
-{
-  if (curwin->w_set_curswant) {
-    validate_virtcol();
-    curwin->w_curswant = curwin->w_virtcol;
-    curwin->w_set_curswant = FALSE;
-  }
-}
-
-/*
- * 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) {
-    wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
-                     |VALID_CHEIGHT|VALID_CROW|VALID_TOPLINE);
-    wp->w_valid_cursor = wp->w_cursor;
-    wp->w_valid_leftcol = wp->w_leftcol;
-  } else if (wp->w_cursor.col != wp->w_valid_cursor.col
-             || wp->w_leftcol != wp->w_valid_leftcol
-             || wp->w_cursor.coladd != wp->w_valid_cursor.coladd
-             ) {
-    wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL);
-    wp->w_valid_cursor.col = wp->w_cursor.col;
-    wp->w_valid_leftcol = wp->w_leftcol;
-    wp->w_valid_cursor.coladd = wp->w_cursor.coladd;
-  }
-}
-
-/*
- * 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);
-}
-
-void changed_window_setting_win(win_T *wp)
-{
-  wp->w_lines_valid = 0;
-  changed_line_abv_curs_win(wp);
-  wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP|VALID_TOPLINE);
-  redraw_win_later(wp, NOT_VALID);
-}
-
-/*
- * Set wp->w_topline to a certain number.
- */
-void set_topline(win_T *wp, linenr_T lnum)
-{
-  /* go to first of folded lines */
-  (void)hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL);
-  /* Approximate the value of w_botline */
-  wp->w_botline += lnum - wp->w_topline;
-  wp->w_topline = lnum;
-  wp->w_topline_was_set = TRUE;
-  wp->w_topfill = 0;
-  wp->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_TOPLINE);
-  /* Don't set VALID_TOPLINE here, 'scrolloff' needs to be checked. */
-  redraw_later(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!
- */
-void changed_cline_bef_curs(void)
-{
-  curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
-                       |VALID_CHEIGHT|VALID_TOPLINE);
-}
-
-void changed_cline_bef_curs_win(win_T *wp)
-{
-  wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
-                   |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!
- */
-void changed_line_abv_curs(void)
-{
-  curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW
-                       |VALID_CHEIGHT|VALID_TOPLINE);
-}
-
-void changed_line_abv_curs_win(win_T *wp)
-{
-  wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW
-                   |VALID_CHEIGHT|VALID_TOPLINE);
-}
-
-/*
- * Make sure the value of curwin->w_botline is valid.
- */
-void validate_botline(void)
-{
-  if (!(curwin->w_valid & VALID_BOTLINE))
-    comp_botline(curwin);
-}
-
-/*
- * Make sure the value of wp->w_botline is valid.
- */
-static void validate_botline_win(win_T *wp)
-{
-  if (!(wp->w_valid & VALID_BOTLINE))
-    comp_botline(wp);
-}
-
-/*
- * 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);
-}
-
-void invalidate_botline_win(win_T *wp)
-{
-  wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
-}
-
-void approximate_botline_win(win_T *wp)
-{
-  wp->w_valid &= ~VALID_BOTLINE;
-}
-
-/*
- * Return TRUE if curwin->w_wrow and curwin->w_wcol are valid.
- */
-int cursor_valid(void)
-{
-  check_cursor_moved(curwin);
-  return (curwin->w_valid & (VALID_WROW|VALID_WCOL)) ==
-         (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!
- */
-void validate_cursor(void)
-{
-  check_cursor_moved(curwin);
-  if ((curwin->w_valid & (VALID_WCOL|VALID_WROW)) != (VALID_WCOL|VALID_WROW))
-    curs_columns(TRUE);
-}
-
-/*
- * Compute wp->w_cline_row and wp->w_cline_height, based on the current value
- * of wp->w_topline.
- *
- * Returns OK when cursor is in the window, FAIL when it isn't.
- */
-static void 
-curs_rows (
-    win_T *wp,
-    int do_botline                         /* also compute w_botline */
-)
-{
-  linenr_T lnum;
-  int i;
-  int all_invalid;
-  int valid;
-  long fold_count;
-
-  /* Check if wp->w_lines[].wl_size is invalid */
-  all_invalid = (!redrawing()
-                 || wp->w_lines_valid == 0
-                 || wp->w_lines[0].wl_lnum > wp->w_topline);
-  i = 0;
-  wp->w_cline_row = 0;
-  for (lnum = wp->w_topline; lnum < wp->w_cursor.lnum; ++i) {
-    valid = FALSE;
-    if (!all_invalid && i < wp->w_lines_valid) {
-      if (wp->w_lines[i].wl_lnum < lnum || !wp->w_lines[i].wl_valid)
-        continue;                       /* skip changed or deleted lines */
-      if (wp->w_lines[i].wl_lnum == lnum) {
-        /* Check for newly inserted lines below this row, in which
-         * case we need to check for folded lines. */
-        if (!wp->w_buffer->b_mod_set
-            || wp->w_lines[i].wl_lastlnum < wp->w_cursor.lnum
-                                            || wp->w_buffer->b_mod_top
-                                            > wp->w_lines[i].wl_lastlnum + 1)
-          valid = TRUE;
-      } else if (wp->w_lines[i].wl_lnum > lnum)
-        --i;                            /* hold at inserted lines */
-    }
-    if (valid
-        && (lnum != wp->w_topline || !wp->w_p_diff)
-        ) {
-      lnum = wp->w_lines[i].wl_lastlnum + 1;
-      /* Cursor inside folded lines, don't count this row */
-      if (lnum > wp->w_cursor.lnum)
-        break;
-      wp->w_cline_row += wp->w_lines[i].wl_size;
-    } else {
-      fold_count = foldedCount(wp, lnum, NULL);
-      if (fold_count) {
-        lnum += fold_count;
-        if (lnum > wp->w_cursor.lnum)
-          break;
-        ++wp->w_cline_row;
-      } else if (lnum == wp->w_topline)
-        wp->w_cline_row += plines_win_nofill(wp, lnum++, TRUE)
-                           + wp->w_topfill;
-      else
-        wp->w_cline_row += plines_win(wp, lnum++, TRUE);
-    }
-  }
-
-  check_cursor_moved(wp);
-  if (!(wp->w_valid & VALID_CHEIGHT)) {
-    if (all_invalid
-        || i == wp->w_lines_valid
-        || (i < wp->w_lines_valid
-            && (!wp->w_lines[i].wl_valid
-                || wp->w_lines[i].wl_lnum != wp->w_cursor.lnum))) {
-      if (wp->w_cursor.lnum == wp->w_topline)
-        wp->w_cline_height = plines_win_nofill(wp, wp->w_cursor.lnum,
-            TRUE) + wp->w_topfill;
-      else
-        wp->w_cline_height = plines_win(wp, wp->w_cursor.lnum, TRUE);
-      wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum,
-          NULL, NULL, TRUE, NULL);
-    } else if (i > wp->w_lines_valid) {
-      /* a line that is too long to fit on the last screen line */
-      wp->w_cline_height = 0;
-      wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum,
-          NULL, NULL, TRUE, NULL);
-    } else {
-      wp->w_cline_height = wp->w_lines[i].wl_size;
-      wp->w_cline_folded = wp->w_lines[i].wl_folded;
-    }
-  }
-
-  redraw_for_cursorline(curwin);
-  wp->w_valid |= VALID_CROW|VALID_CHEIGHT;
-
-  /* validate botline too, if update_screen doesn't do it */
-  if (do_botline && all_invalid)
-    validate_botline_win(wp);
-}
-
-/*
- * Validate curwin->w_virtcol only.
- */
-void validate_virtcol(void)
-{
-  validate_virtcol_win(curwin);
-}
-
-/*
- * 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);
-    wp->w_valid |= VALID_VIRTCOL;
-    if (wp->w_p_cuc
-        && !pum_visible()
-        )
-      redraw_win_later(wp, SOME_VALID);
-  }
-}
-
-/*
- * Validate curwin->w_cline_height only.
- */
-static void validate_cheight(void)
-{
-  check_cursor_moved(curwin);
-  if (!(curwin->w_valid & VALID_CHEIGHT)) {
-    if (curwin->w_cursor.lnum == curwin->w_topline)
-      curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum)
-                               + curwin->w_topfill;
-    else
-      curwin->w_cline_height = plines(curwin->w_cursor.lnum);
-    curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL);
-    curwin->w_valid |= VALID_CHEIGHT;
-  }
-}
-
-/*
- * Validate w_wcol and w_virtcol only.
- */
-void validate_cursor_col(void)
-{
-  colnr_T off;
-  colnr_T col;
-  int width;
-
-  validate_virtcol();
-  if (!(curwin->w_valid & VALID_WCOL)) {
-    col = curwin->w_virtcol;
-    off = curwin_col_off();
-    col += off;
-    width = W_WIDTH(curwin) - off + curwin_col_off2();
-
-    /* long line wrapping, adjust curwin->w_wrow */
-    if (curwin->w_p_wrap
-        && col >= (colnr_T)W_WIDTH(curwin)
-        && width > 0)
-      /* use same formula as what is used in curs_columns() */
-      col -= ((col - W_WIDTH(curwin)) / 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).
- */
-int win_col_off(win_T *wp)
-{
-  return ((wp->w_p_nu || wp->w_p_rnu) ? number_width(wp) + 1 : 0)
-         + (cmdwin_type == 0 || wp != curwin ? 0 : 1)
-         + wp->w_p_fdc
-         + (wp->w_buffer->b_signlist != NULL ? 2 : 0)
-  ;
-}
-
-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'.
- */
-int win_col_off2(win_T *wp)
-{
-  if ((wp->w_p_nu || wp->w_p_rnu) && vim_strchr(p_cpo, CPO_NUMCOL) != NULL)
-    return number_width(wp) + 1;
-  return 0;
-}
-
-int curwin_col_off2(void)
-{
-  return win_col_off2(curwin);
-}
-
-/*
- * compute curwin->w_wcol and curwin->w_virtcol.
- * Also updates curwin->w_wrow and curwin->w_cline_row.
- * Also updates curwin->w_leftcol.
- */
-void 
-curs_columns (
-    int may_scroll                 /* when TRUE, may scroll horizontally */
-)
-{
-  int diff;
-  int extra;                    /* offset for first screen line */
-  int off_left, off_right;
-  int n;
-  int p_lines;
-  int width = 0;
-  int textwidth;
-  int new_leftcol;
-  colnr_T startcol;
-  colnr_T endcol;
-  colnr_T prev_skipcol;
-
-  /*
-   * First make sure that w_topline is valid (after moving the cursor).
-   */
-  update_topline();
-
-  /*
-   * Next make sure that w_cline_row is valid.
-   */
-  if (!(curwin->w_valid & VALID_CROW))
-    curs_rows(curwin, FALSE);
-
-  /*
-   * Compute the number of virtual columns.
-   */
-  if (curwin->w_cline_folded)
-    /* In a folded line the cursor is always in the first column */
-    startcol = curwin->w_virtcol = endcol = curwin->w_leftcol;
-  else
-    getvvcol(curwin, &curwin->w_cursor,
-        &startcol, &(curwin->w_virtcol), &endcol);
-
-  /* remove '$' from change command when cursor moves onto it */
-  if (startcol > dollar_vcol)
-    dollar_vcol = -1;
-
-  extra = curwin_col_off();
-  curwin->w_wcol = curwin->w_virtcol + extra;
-  endcol += extra;
-
-  /*
-   * Now compute w_wrow, counting screen lines from w_cline_row.
-   */
-  curwin->w_wrow = curwin->w_cline_row;
-
-  textwidth = W_WIDTH(curwin) - extra;
-  if (textwidth <= 0) {
-    /* No room for text, put cursor in last char of window. */
-    curwin->w_wcol = W_WIDTH(curwin) - 1;
-    curwin->w_wrow = curwin->w_height - 1;
-  } else if (curwin->w_p_wrap
-             && curwin->w_width != 0
-             ) {
-    width = textwidth + curwin_col_off2();
-
-    /* long line wrapping, adjust curwin->w_wrow */
-    if (curwin->w_wcol >= W_WIDTH(curwin)) {
-      /* this same formula is used in validate_cursor_col() */
-      n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1;
-      curwin->w_wcol -= n * width;
-      curwin->w_wrow += n;
-
-      /* When cursor wraps to first char of next line in Insert
-       * mode, the 'showbreak' string isn't shown, backup to first
-       * column */
-      if (*p_sbr && *ml_get_cursor() == NUL
-          && curwin->w_wcol == (int)vim_strsize(p_sbr))
-        curwin->w_wcol = 0;
-    }
-  }
-  /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line
-   * is not folded.
-   * If scrolling is off, curwin->w_leftcol is assumed to be 0 */
-  else if (may_scroll
-           && !curwin->w_cline_folded
-           ) {
-    /*
-     * If Cursor is left of the screen, scroll rightwards.
-     * If Cursor is right of the screen, scroll leftwards
-     * If we get closer to the edge than 'sidescrolloff', scroll a little
-     * extra
-     */
-    off_left = (int)startcol - (int)curwin->w_leftcol - p_siso;
-    off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin)
-                                    - p_siso) + 1;
-    if (off_left < 0 || off_right > 0) {
-      if (off_left < 0)
-        diff = -off_left;
-      else
-        diff = off_right;
-
-      /* When far off or not enough room on either side, put cursor in
-       * middle of window. */
-      if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left)
-        new_leftcol = curwin->w_wcol - extra - textwidth / 2;
-      else {
-        if (diff < p_ss)
-          diff = p_ss;
-        if (off_left < 0)
-          new_leftcol = curwin->w_leftcol - diff;
-        else
-          new_leftcol = curwin->w_leftcol + diff;
-      }
-      if (new_leftcol < 0)
-        new_leftcol = 0;
-      if (new_leftcol != (int)curwin->w_leftcol) {
-        curwin->w_leftcol = new_leftcol;
-        /* screen has to be redrawn with new curwin->w_leftcol */
-        redraw_later(NOT_VALID);
-      }
-    }
-    curwin->w_wcol -= curwin->w_leftcol;
-  } else if (curwin->w_wcol > (int)curwin->w_leftcol)
-    curwin->w_wcol -= curwin->w_leftcol;
-  else
-    curwin->w_wcol = 0;
-
-  /* Skip over filler lines.  At the top use w_topfill, there
-   * may be some filler lines above the window. */
-  if (curwin->w_cursor.lnum == curwin->w_topline)
-    curwin->w_wrow += curwin->w_topfill;
-  else
-    curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum);
-
-  prev_skipcol = curwin->w_skipcol;
-
-  p_lines = 0;
-  if ((curwin->w_wrow >= curwin->w_height
-       || ((prev_skipcol > 0
-            || curwin->w_wrow + p_so >= curwin->w_height)
-           && (p_lines =
-                 plines_win_nofill
-                   (curwin, curwin->w_cursor.lnum, FALSE))
-           - 1 >= curwin->w_height))
-      && curwin->w_height != 0
-      && curwin->w_cursor.lnum == curwin->w_topline
-      && width > 0
-      && curwin->w_width != 0
-      ) {
-    /* Cursor past end of screen.  Happens with a single line that does
-     * not fit on screen.  Find a skipcol to show the text around the
-     * cursor.  Avoid scrolling all the time. compute value of "extra":
-     * 1: Less than "p_so" lines above
-     * 2: Less than "p_so" lines below
-     * 3: both of them */
-    extra = 0;
-    if (curwin->w_skipcol + p_so * width > curwin->w_virtcol)
-      extra = 1;
-    /* Compute last display line of the buffer line that we want at the
-     * bottom of the window. */
-    if (p_lines == 0)
-      p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE);
-    --p_lines;
-    if (p_lines > curwin->w_wrow + p_so)
-      n = curwin->w_wrow + p_so;
-    else
-      n = p_lines;
-    if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width)
-      extra += 2;
-
-    if (extra == 3 || p_lines < p_so * 2) {
-      /* not enough room for 'scrolloff', put cursor in the middle */
-      n = curwin->w_virtcol / width;
-      if (n > curwin->w_height / 2)
-        n -= curwin->w_height / 2;
-      else
-        n = 0;
-      /* don't skip more than necessary */
-      if (n > p_lines - curwin->w_height + 1)
-        n = p_lines - curwin->w_height + 1;
-      curwin->w_skipcol = n * width;
-    } else if (extra == 1) {
-      /* less then 'scrolloff' lines above, decrease skipcol */
-      extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol
-               + width - 1) / width;
-      if (extra > 0) {
-        if ((colnr_T)(extra * width) > curwin->w_skipcol)
-          extra = curwin->w_skipcol / width;
-        curwin->w_skipcol -= extra * width;
-      }
-    } else if (extra == 2) {
-      /* less then 'scrolloff' lines below, increase skipcol */
-      endcol = (n - curwin->w_height + 1) * width;
-      while (endcol > curwin->w_virtcol)
-        endcol -= width;
-      if (endcol > curwin->w_skipcol)
-        curwin->w_skipcol = endcol;
-    }
-
-    curwin->w_wrow -= curwin->w_skipcol / width;
-    if (curwin->w_wrow >= curwin->w_height) {
-      /* small window, make sure cursor is in it */
-      extra = curwin->w_wrow - curwin->w_height + 1;
-      curwin->w_skipcol += extra * width;
-      curwin->w_wrow -= extra;
-    }
-
-    extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width;
-    if (extra > 0)
-      win_ins_lines(curwin, 0, extra, FALSE, FALSE);
-    else if (extra < 0)
-      win_del_lines(curwin, 0, -extra, FALSE, FALSE);
-  } else
-    curwin->w_skipcol = 0;
-  if (prev_skipcol != curwin->w_skipcol)
-    redraw_later(NOT_VALID);
-
-  /* Redraw when w_virtcol changes and 'cursorcolumn' is set */
-  if (curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0
-      && !pum_visible()) {
-    redraw_later(SOME_VALID);
-  }
-
-  curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
-}
-
-/*
- * Scroll the current window down by "line_count" logical lines.  "CTRL-Y"
- */
-void 
-scrolldown (
-    long line_count,
-    int byfold              /* TRUE: count a closed fold as one line */
-)
-{
-  long done = 0;                /* total # of physical lines done */
-  int wrow;
-  int moved = FALSE;
-
-  linenr_T first;
-
-  /* Make sure w_topline is at the first of a sequence of folded lines. */
-  (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
-  validate_cursor();            /* w_wrow needs to be valid */
-  while (line_count-- > 0) {
-    if (curwin->w_topfill < diff_check(curwin, curwin->w_topline)
-        && curwin->w_topfill < curwin->w_height - 1) {
-      ++curwin->w_topfill;
-      ++done;
-    } else {
-      if (curwin->w_topline == 1)
-        break;
-      --curwin->w_topline;
-      curwin->w_topfill = 0;
-      /* A sequence of folded lines only counts for one logical line */
-      if (hasFolding(curwin->w_topline, &first, NULL)) {
-        ++done;
-        if (!byfold)
-          line_count -= curwin->w_topline - first - 1;
-        curwin->w_botline -= curwin->w_topline - first;
-        curwin->w_topline = first;
-      } else
-        done += plines_nofill(curwin->w_topline);
-    }
-    --curwin->w_botline;                /* approximate w_botline */
-    invalidate_botline();
-  }
-  curwin->w_wrow += done;               /* keep w_wrow updated */
-  curwin->w_cline_row += done;          /* keep w_cline_row updated */
-
-  if (curwin->w_cursor.lnum == curwin->w_topline)
-    curwin->w_cline_row = 0;
-  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.
-   */
-  wrow = curwin->w_wrow;
-  if (curwin->w_p_wrap
-      && curwin->w_width != 0
-      ) {
-    validate_virtcol();
-    validate_cheight();
-    wrow += curwin->w_cline_height - 1 -
-            curwin->w_virtcol / W_WIDTH(curwin);
-  }
-  while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1) {
-    if (hasFolding(curwin->w_cursor.lnum, &first, NULL)) {
-      --wrow;
-      if (first == 1)
-        curwin->w_cursor.lnum = 1;
-      else
-        curwin->w_cursor.lnum = first - 1;
-    } else
-      wrow -= plines(curwin->w_cursor.lnum--);
-    curwin->w_valid &=
-      ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
-    moved = TRUE;
-  }
-  if (moved) {
-    /* Move cursor to first line of closed fold. */
-    foldAdjustCursor();
-    coladvance(curwin->w_curswant);
-  }
-}
-
-/*
- * Scroll the current window up by "line_count" logical lines.  "CTRL-E"
- */
-void 
-scrollup (
-    long line_count,
-    int byfold              /* TRUE: count a closed fold as one line */
-)
-{
-  linenr_T lnum;
-
-  if (
-    (byfold && hasAnyFolding(curwin))
-    ||
-    curwin->w_p_diff
-    ) {
-    /* count each sequence of folded lines as one logical line */
-    lnum = curwin->w_topline;
-    while (line_count--) {
-      if (curwin->w_topfill > 0)
-        --curwin->w_topfill;
-      else {
-        if (byfold)
-          (void)hasFolding(lnum, NULL, &lnum);
-        if (lnum >= curbuf->b_ml.ml_line_count)
-          break;
-        ++lnum;
-        curwin->w_topfill = diff_check_fill(curwin, lnum);
-      }
-    }
-    /* approximate w_botline */
-    curwin->w_botline += lnum - curwin->w_topline;
-    curwin->w_topline = lnum;
-  } else {
-    curwin->w_topline +=