refactor: move tabline code to statusline.c (#21008)

* refactor: move tabline code to statusline.c

Problem:	Tabline code is closely related to statusline, but still left over in drawscreen.c and screen.c.
Solution:	Move it to statusline.c.

* refactor: add statusline_defs.h

1 files changed, 0 insertions, 270 deletions

diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index 39b3291404..2470fd326b 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -582,65 +582,6 @@ void check_for_delay(bool check_msg_scroll)
   }
 }
 
-/// Clear status line, window bar or tab page line click definition table
-///
-/// @param[out]  tpcd  Table to clear.
-/// @param[in]  tpcd_size  Size of the table.
-void stl_clear_click_defs(StlClickDefinition *const click_defs, const long click_defs_size)
-{
-  if (click_defs != NULL) {
-    for (long i = 0; i < click_defs_size; i++) {
-      if (i == 0 || click_defs[i].func != click_defs[i - 1].func) {
-        xfree(click_defs[i].func);
-      }
-    }
-    memset(click_defs, 0, (size_t)click_defs_size * sizeof(click_defs[0]));
-  }
-}
-
-/// Allocate or resize the click definitions array if needed.
-StlClickDefinition *stl_alloc_click_defs(StlClickDefinition *cdp, long width, size_t *size)
-{
-  if (*size < (size_t)width) {
-    xfree(cdp);
-    *size = (size_t)width;
-    cdp = xcalloc(*size, sizeof(StlClickDefinition));
-  }
-  return cdp;
-}
-
-/// Fill the click definitions array if needed.
-void stl_fill_click_defs(StlClickDefinition *click_defs, StlClickRecord *click_recs, char *buf,
-                         int width, bool tabline)
-{
-  if (click_defs == NULL) {
-    return;
-  }
-
-  int col = 0;
-  int len = 0;
-
-  StlClickDefinition cur_click_def = {
-    .type = kStlClickDisabled,
-  };
-  for (int i = 0; click_recs[i].start != NULL; i++) {
-    len += vim_strnsize(buf, (int)(click_recs[i].start - buf));
-    while (col < len) {
-      click_defs[col++] = cur_click_def;
-    }
-    buf = (char *)click_recs[i].start;
-    cur_click_def = click_recs[i].def;
-    if (!tabline && !(cur_click_def.type == kStlClickDisabled
-                      || cur_click_def.type == kStlClickFuncRun)) {
-      // window bar and status line only support click functions
-      cur_click_def.type = kStlClickDisabled;
-    }
-  }
-  while (col < width) {
-    click_defs[col++] = cur_click_def;
-  }
-}
-
 /// Set cursor to its position in the current window.
 void setcursor(void)
 {
@@ -959,217 +900,6 @@ static void recording_mode(int attr)
   }
 }
 
-/// Draw the tab pages line at the top of the Vim window.
-void draw_tabline(void)
-{
-  int tabcount = 0;
-  int tabwidth = 0;
-  int col = 0;
-  int scol = 0;
-  int attr;
-  win_T *wp;
-  win_T *cwp;
-  int wincount;
-  int modified;
-  int c;
-  int len;
-  int attr_nosel = HL_ATTR(HLF_TP);
-  int attr_fill = HL_ATTR(HLF_TPF);
-  char_u *p;
-  int room;
-  int use_sep_chars = (t_colors < 8);
-
-  if (default_grid.chars == NULL) {
-    return;
-  }
-  redraw_tabline = false;
-
-  if (ui_has(kUITabline)) {
-    ui_ext_tabline_update();
-    return;
-  }
-
-  if (tabline_height() < 1) {
-    return;
-  }
-
-  // Init TabPageIdxs[] to zero: Clicking outside of tabs has no effect.
-  assert(Columns == tab_page_click_defs_size);
-  stl_clear_click_defs(tab_page_click_defs, tab_page_click_defs_size);
-
-  // Use the 'tabline' option if it's set.
-  if (*p_tal != NUL) {
-    win_redr_custom(NULL, false, false);
-  } else {
-    FOR_ALL_TABS(tp) {
-      tabcount++;
-    }
-
-    if (tabcount > 0) {
-      tabwidth = (Columns - 1 + tabcount / 2) / tabcount;
-    }
-
-    if (tabwidth < 6) {
-      tabwidth = 6;
-    }
-
-    attr = attr_nosel;
-    tabcount = 0;
-
-    FOR_ALL_TABS(tp) {
-      if (col >= Columns - 4) {
-        break;
-      }
-
-      scol = col;
-
-      if (tp == curtab) {
-        cwp = curwin;
-        wp = firstwin;
-      } else {
-        cwp = tp->tp_curwin;
-        wp = tp->tp_firstwin;
-      }
-
-      if (tp->tp_topframe == topframe) {
-        attr = win_hl_attr(cwp, HLF_TPS);
-      }
-      if (use_sep_chars && col > 0) {
-        grid_putchar(&default_grid, '|', 0, col++, attr);
-      }
-
-      if (tp->tp_topframe != topframe) {
-        attr = win_hl_attr(cwp, HLF_TP);
-      }
-
-      grid_putchar(&default_grid, ' ', 0, col++, attr);
-
-      modified = false;
-
-      for (wincount = 0; wp != NULL; wp = wp->w_next, wincount++) {
-        if (bufIsChanged(wp->w_buffer)) {
-          modified = true;
-        }
-      }
-
-      if (modified || wincount > 1) {
-        if (wincount > 1) {
-          vim_snprintf((char *)NameBuff, MAXPATHL, "%d", wincount);
-          len = (int)strlen(NameBuff);
-          if (col + len >= Columns - 3) {
-            break;
-          }
-          grid_puts_len(&default_grid, NameBuff, len, 0, col,
-                        hl_combine_attr(attr, win_hl_attr(cwp, HLF_T)));
-          col += len;
-        }
-        if (modified) {
-          grid_puts_len(&default_grid, "+", 1, 0, col++, attr);
-        }
-        grid_putchar(&default_grid, ' ', 0, col++, attr);
-      }
-
-      room = scol - col + tabwidth - 1;
-      if (room > 0) {
-        // Get buffer name in NameBuff[]
-        get_trans_bufname(cwp->w_buffer);
-        shorten_dir(NameBuff);
-        len = vim_strsize((char *)NameBuff);
-        p = (char_u *)NameBuff;
-        while (len > room) {
-          len -= ptr2cells((char *)p);
-          MB_PTR_ADV(p);
-        }
-        if (len > Columns - col - 1) {
-          len = Columns - col - 1;
-        }
-
-        grid_puts_len(&default_grid, (char *)p, (int)STRLEN(p), 0, col, attr);
-        col += len;
-      }
-      grid_putchar(&default_grid, ' ', 0, col++, attr);
-
-      // Store the tab page number in tab_page_click_defs[], so that
-      // jump_to_mouse() knows where each one is.
-      tabcount++;
-      while (scol < col) {
-        tab_page_click_defs[scol++] = (StlClickDefinition) {
-          .type = kStlClickTabSwitch,
-          .tabnr = tabcount,
-          .func = NULL,
-        };
-      }
-    }
-
-    if (use_sep_chars) {
-      c = '_';
-    } else {
-      c = ' ';
-    }
-    grid_fill(&default_grid, 0, 1, col, Columns, c, c, attr_fill);
-
-    // Put an "X" for closing the current tab if there are several.
-    if (first_tabpage->tp_next != NULL) {
-      grid_putchar(&default_grid, 'X', 0, Columns - 1, attr_nosel);
-      tab_page_click_defs[Columns - 1] = (StlClickDefinition) {
-        .type = kStlClickTabClose,
-        .tabnr = 999,
-        .func = NULL,
-      };
-    }
-  }
-
-  // Reset the flag here again, in case evaluating 'tabline' causes it to be
-  // set.
-  redraw_tabline = false;
-}
-
-static void ui_ext_tabline_update(void)
-{
-  Arena arena = ARENA_EMPTY;
-
-  size_t n_tabs = 0;
-  FOR_ALL_TABS(tp) {
-    n_tabs++;
-  }
-
-  Array tabs = arena_array(&arena, n_tabs);
-  FOR_ALL_TABS(tp) {
-    Dictionary tab_info = arena_dict(&arena, 2);
-    PUT_C(tab_info, "tab", TABPAGE_OBJ(tp->handle));
-
-    win_T *cwp = (tp == curtab) ? curwin : tp->tp_curwin;
-    get_trans_bufname(cwp->w_buffer);
-    PUT_C(tab_info, "name", STRING_OBJ(arena_string(&arena, cstr_as_string((char *)NameBuff))));
-
-    ADD_C(tabs, DICTIONARY_OBJ(tab_info));
-  }
-
-  size_t n_buffers = 0;
-  FOR_ALL_BUFFERS(buf) {
-    n_buffers += buf->b_p_bl ? 1 : 0;
-  }
-
-  Array buffers = arena_array(&arena, n_buffers);
-  FOR_ALL_BUFFERS(buf) {
-    // Do not include unlisted buffers
-    if (!buf->b_p_bl) {
-      continue;
-    }
-
-    Dictionary buffer_info = arena_dict(&arena, 2);
-    PUT_C(buffer_info, "buffer", BUFFER_OBJ(buf->handle));
-
-    get_trans_bufname(buf);
-    PUT_C(buffer_info, "name", STRING_OBJ(arena_string(&arena, cstr_as_string((char *)NameBuff))));
-
-    ADD_C(buffers, DICTIONARY_OBJ(buffer_info));
-  }
-
-  ui_call_tabline_update(curtab->handle, tabs, curbuf->handle, buffers);
-  arena_mem_free(arena_finish(&arena));
-}
-
 void get_trans_bufname(buf_T *buf)
 {
   if (buf_spname(buf) != NULL) {