Change ui_line to use window grids and not global grid

Author: coditva

Diff for: src/nvim/screen.c

@@ -4433,17 +4433,17 @@ static void grid_move_line(ScreenGrid *grid, int row, int coloff, int endcol,
       schar_T sc;
       schar_from_char(sc, c);
 
-      if (schar_cmp(grid->ScreenLines[off_to], sc)
-          || grid->ScreenAttrs[off_to] != hl) {
-        schar_copy(grid->ScreenLines[off_to], sc);
-        grid->ScreenAttrs[off_to] = hl;
+      if (schar_cmp(default_grid.ScreenLines[off_to], sc)
+          || default_grid.ScreenAttrs[off_to] != hl) {
+        schar_copy(default_grid.ScreenLines[off_to], sc);
+        default_grid.ScreenAttrs[off_to] = hl;
         if (start_dirty == -1) {
           start_dirty = col;
         }
         end_dirty = col+1;
       }
     } else
-      grid->LineWraps[row] = FALSE;
+      default_grid.LineWraps[row] = false;
   }
 
   if (clear_end < end_dirty) {
@@ -4453,7 +4453,7 @@ static void grid_move_line(ScreenGrid *grid, int row, int coloff, int endcol,
     start_dirty = end_dirty;
   }
   if (clear_end > start_dirty) {
-    ui_line(row, coloff+start_dirty, coloff+end_dirty, coloff+clear_end,
+    ui_line(grid, row, coloff+start_dirty, coloff+end_dirty, coloff+clear_end,
             bg_attr);
   }
 }
@@ -5417,7 +5417,7 @@ void screen_puts_line_flush(bool set_cursor)
     if (set_cursor) {
       ui_cursor_goto(put_dirty_row, put_dirty_last);
     }
-    ui_line(put_dirty_row, put_dirty_first, put_dirty_last, put_dirty_last, 0);
+    ui_line(&default_grid, put_dirty_row, put_dirty_first, put_dirty_last, put_dirty_last, 0);
     put_dirty_first = -1;
     put_dirty_last = 0;
   }
@@ -5778,16 +5778,16 @@ void grid_fill(ScreenGrid *grid, int start_row, int end_row, int start_col,
         put_dirty_last = MAX(put_dirty_last, dirty_last);
       } else {
         int last = c2 != ' ' ? dirty_last : dirty_first + (c1 != ' ');
-        ui_line(row, dirty_first, last, dirty_last, attr);
+        ui_line(grid, row, dirty_first, last, dirty_last, attr);
       }
     }
 
-    if (end_col == grid->Columns) {
+    if (end_col == Columns) {
       grid->LineWraps[row] = false;
     }
 
     // TODO(bfredl): The relevant caller should do this
-    if (row == Rows - 1) {  // overwritten the command line
+    if (row == grid->Rows - 1) {  // overwritten the command line
       redraw_cmdline = true;
       if (c1 == ' ' && c2 == ' ') {
         clear_cmdline = false;  // command line has been cleared
@@ -7049,8 +7049,8 @@ void screen_resize(int width, int height)
   width = Columns;
   ui_resize(width, height);
 
-  Rows = default_grid.Rows;
-  Columns = default_grid.Columns;
+  default_grid.Rows = screen_Rows;
+  default_grid.Columns = screen_Columns;
 
   /* The window layout used to be adjusted here, but it now happens in
    * screenalloc() (also invoked from screenclear()).  That is because the

Diff for: src/nvim/ui.c

@@ -314,11 +314,14 @@ void ui_set_ext_option(UI *ui, UIExtension ext, bool active)
   }
 }
 
-void ui_line(int row, int startcol, int endcol, int clearcol, int clearattr)
+void ui_line(ScreenGrid *grid, int row, int startcol, int endcol, int clearcol, int clearattr)
 {
-  size_t off = LineOffset[row]+(size_t)startcol;
-  UI_CALL(raw_line, 1, row, startcol, endcol, clearcol, clearattr,
-          (const schar_T *)ScreenLines+off, (const sattr_T *)ScreenAttrs+off);
+  size_t off = grid->LineOffset[row] + (size_t)startcol;
+  UI_CALL(raw_line, 1, grid->OffsetRow + row, grid->OffsetColumn + startcol,
+          grid->OffsetColumn + endcol, grid->OffsetColumn + clearcol,
+          clearattr, (const schar_T *)grid->ScreenLines + off,
+          (const schar_T *)grid->ScreenAttrs + off);
+
   if (p_wd) {  // 'writedelay': flush & delay each time.
     int old_row = row, old_col = col;
     // If'writedelay is active, we set the cursor to highlight what was drawn