refactor: move more grid functions to grid.c. Clean up some variables

7 files changed, 105 insertions, 104 deletions

diff --git a/src/nvim/api/ui.c b/src/nvim/api/ui.c
index b4d20ed975..52f76f4650 100644
--- a/src/nvim/api/ui.c
+++ b/src/nvim/api/ui.c
@@ -349,7 +349,11 @@ void nvim_ui_try_resize_grid(uint64_t channel_id, Integer grid, Integer width, I
     return;
   }
 
-  ui_grid_resize((handle_T)grid, (int)width, (int)height, err);
+  if (grid == DEFAULT_GRID_HANDLE) {
+    nvim_ui_try_resize(channel_id, width, height, err);
+  } else {
+    ui_grid_resize((handle_T)grid, (int)width, (int)height, err);
+  }
 }
 
 /// Tells Nvim the number of elements displaying in the popumenu, to decide
diff --git a/src/nvim/globals.h b/src/nvim/globals.h
index fecb1adee4..1819af7ee4 100644
--- a/src/nvim/globals.h
+++ b/src/nvim/globals.h
@@ -421,10 +421,6 @@ EXTERN vimmenu_T *root_menu INIT(= NULL);
 // overruling of menus that the user already defined.
 EXTERN int sys_menu INIT(= false);
 
-// While redrawing the screen this flag is set.  It means the screen size
-// ('lines' and 'rows') must not be changed.
-EXTERN int updating_screen INIT(= 0);
-
 // All windows are linked in a list. firstwin points to the first entry,
 // lastwin to the last entry (can be the same as firstwin) and curwin to the
 // currently active window.
diff --git a/src/nvim/grid.c b/src/nvim/grid.c
index 5ed76c8998..fa5c193fe0 100644
--- a/src/nvim/grid.c
+++ b/src/nvim/grid.c
@@ -6,6 +6,7 @@
 #include "nvim/highlight.h"
 #include "nvim/ui.h"
 #include "nvim/vim.h"
+#include "nvim/screen.h"
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "grid.c.generated.h"
@@ -705,3 +706,83 @@ void grid_free_all_mem(void)
   xfree(linebuf_char);
   xfree(linebuf_attr);
 }
+
+/// (Re)allocates a window grid if size changed while in ext_multigrid mode.
+/// Updates size, offsets and handle for the grid regardless.
+///
+/// If "doclear" is true, don't try to copy from the old grid rather clear the
+/// resized grid.
+void win_grid_alloc(win_T *wp)
+{
+  ScreenGrid *grid = &wp->w_grid;
+  ScreenGrid *grid_allocated = &wp->w_grid_alloc;
+
+  int rows = wp->w_height_inner;
+  int cols = wp->w_width_inner;
+  int total_rows = wp->w_height_outer;
+  int total_cols = wp->w_width_outer;
+
+  bool want_allocation = ui_has(kUIMultigrid) || wp->w_floating;
+  bool has_allocation = (grid_allocated->chars != NULL);
+
+  if (grid->rows != rows) {
+    wp->w_lines_valid = 0;
+    xfree(wp->w_lines);
+    wp->w_lines = xcalloc((size_t)rows + 1, sizeof(wline_T));
+  }
+
+  int was_resized = false;
+  if (want_allocation && (!has_allocation
+                          || grid_allocated->rows != total_rows
+                          || grid_allocated->cols != total_cols)) {
+    grid_alloc(grid_allocated, total_rows, total_cols,
+               wp->w_grid_alloc.valid, false);
+    grid_allocated->valid = true;
+    if (wp->w_floating && wp->w_float_config.border) {
+      wp->w_redr_border = true;
+    }
+    was_resized = true;
+  } else if (!want_allocation && has_allocation) {
+    // Single grid mode, all rendering will be redirected to default_grid.
+    // Only keep track of the size and offset of the window.
+    grid_free(grid_allocated);
+    grid_allocated->valid = false;
+    was_resized = true;
+  } else if (want_allocation && has_allocation && !wp->w_grid_alloc.valid) {
+    grid_invalidate(grid_allocated);
+    grid_allocated->valid = true;
+  }
+
+  grid->rows = rows;
+  grid->cols = cols;
+
+  if (want_allocation) {
+    grid->target = grid_allocated;
+    grid->row_offset = wp->w_winrow_off;
+    grid->col_offset = wp->w_wincol_off;
+  } else {
+    grid->target = &default_grid;
+    grid->row_offset = wp->w_winrow + wp->w_winrow_off;
+    grid->col_offset = wp->w_wincol + wp->w_wincol_off;
+  }
+
+  // send grid resize event if:
+  // - a grid was just resized
+  // - screen_resize was called and all grid sizes must be sent
+  // - the UI wants multigrid event (necessary)
+  if ((resizing_screen || was_resized) && want_allocation) {
+    ui_call_grid_resize(grid_allocated->handle,
+                        grid_allocated->cols, grid_allocated->rows);
+  }
+}
+
+/// assign a handle to the grid. The grid need not be allocated.
+void grid_assign_handle(ScreenGrid *grid)
+{
+  static int last_grid_handle = DEFAULT_GRID_HANDLE;
+
+  // only assign a grid handle if not already
+  if (grid->handle == 0) {
+    grid->handle = ++last_grid_handle;
+  }
+}
diff --git a/src/nvim/os/input.c b/src/nvim/os/input.c
index c99d2869da..e4a91d1416 100644
--- a/src/nvim/os/input.c
+++ b/src/nvim/os/input.c
@@ -19,6 +19,7 @@
 #include "nvim/memory.h"
 #include "nvim/msgpack_rpc/channel.h"
 #include "nvim/os/input.h"
+#include "nvim/screen.h"
 #include "nvim/state.h"
 #include "nvim/ui.h"
 #include "nvim/vim.h"
diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index 15594ac1d3..8ca8c7985a 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -132,10 +132,6 @@
 
 static match_T search_hl;       // used for 'hlsearch' highlight matching
 
-StlClickDefinition *tab_page_click_defs = NULL;
-
-long tab_page_click_defs_size = 0;
-
 // for line_putchar. Contains the state that needs to be remembered from
 // putting one character to the next.
 typedef struct {
@@ -607,8 +603,6 @@ int update_screen(int type)
     pum_redraw();
   }
 
-  send_grid_resize = false;
-
   /* Reset b_mod_set flags.  Going through all windows is probably faster
    * than going through all buffers (there could be many buffers). */
   FOR_ALL_WINDOWS_IN_TAB(wp, curtab) {
@@ -5571,88 +5565,6 @@ void check_for_delay(bool check_msg_scroll)
   }
 }
 
-/// (Re)allocates a window grid if size changed while in ext_multigrid mode.
-/// Updates size, offsets and handle for the grid regardless.
-///
-/// If "doclear" is true, don't try to copy from the old grid rather clear the
-/// resized grid.
-void win_grid_alloc(win_T *wp)
-{
-  ScreenGrid *grid = &wp->w_grid;
-  ScreenGrid *grid_allocated = &wp->w_grid_alloc;
-
-  int rows = wp->w_height_inner;
-  int cols = wp->w_width_inner;
-  int total_rows = wp->w_height_outer;
-  int total_cols = wp->w_width_outer;
-
-  bool want_allocation = ui_has(kUIMultigrid) || wp->w_floating;
-  bool has_allocation = (grid_allocated->chars != NULL);
-
-  if (grid->rows != rows) {
-    wp->w_lines_valid = 0;
-    xfree(wp->w_lines);
-    wp->w_lines = xcalloc(rows + 1, sizeof(wline_T));
-  }
-
-  int was_resized = false;
-  if (want_allocation && (!has_allocation
-                          || grid_allocated->rows != total_rows
-                          || grid_allocated->cols != total_cols)) {
-    grid_alloc(grid_allocated, total_rows, total_cols,
-               wp->w_grid_alloc.valid, false);
-    grid_allocated->valid = true;
-    if (wp->w_floating && wp->w_float_config.border) {
-      wp->w_redr_border = true;
-    }
-    was_resized = true;
-  } else if (!want_allocation && has_allocation) {
-    // Single grid mode, all rendering will be redirected to default_grid.
-    // Only keep track of the size and offset of the window.
-    grid_free(grid_allocated);
-    grid_allocated->valid = false;
-    was_resized = true;
-  } else if (want_allocation && has_allocation && !wp->w_grid_alloc.valid) {
-    grid_invalidate(grid_allocated);
-    grid_allocated->valid = true;
-  }
-
-  grid->rows = rows;
-  grid->cols = cols;
-
-  wp->w_winrow_off = wp->w_border_adj[0] + wp->w_winbar_height;
-  wp->w_wincol_off = wp->w_border_adj[3];
-
-  if (want_allocation) {
-    grid->target = grid_allocated;
-    grid->row_offset = wp->w_winrow_off;
-    grid->col_offset = wp->w_wincol_off;
-  } else {
-    grid->target = &default_grid;
-    grid->row_offset = wp->w_winrow + wp->w_winrow_off;
-    grid->col_offset = wp->w_wincol + wp->w_wincol_off;
-  }
-
-  // send grid resize event if:
-  // - a grid was just resized
-  // - screen_resize was called and all grid sizes must be sent
-  // - the UI wants multigrid event (necessary)
-  if ((send_grid_resize || was_resized) && want_allocation) {
-    ui_call_grid_resize(grid_allocated->handle,
-                        grid_allocated->cols, grid_allocated->rows);
-  }
-}
-
-/// assign a handle to the grid. The grid need not be allocated.
-void grid_assign_handle(ScreenGrid *grid)
-{
-  static int last_grid_handle = DEFAULT_GRID_HANDLE;
-
-  // only assign a grid handle if not already
-  if (grid->handle == 0) {
-    grid->handle = ++last_grid_handle;
-  }
-}
 
 /// Resize the screen to Rows and Columns.
 ///
@@ -6824,11 +6736,9 @@ static void margin_columns_win(win_T *wp, int *left_col, int *right_col)
 /// Set dimensions of the Nvim application "shell".
 void screen_resize(int width, int height)
 {
-  static bool recursive = false;
-
   // Avoid recursiveness, can happen when setting the window size causes
   // another window-changed signal.
-  if (updating_screen || recursive) {
+  if (updating_screen || resizing_screen) {
     return;
   }
 
@@ -6850,7 +6760,7 @@ void screen_resize(int width, int height)
     return;
   }
 
-  recursive = true;
+  resizing_screen = true;
 
   Rows = height;
   Columns = width;
@@ -6867,9 +6777,9 @@ void screen_resize(int width, int height)
 
   send_grid_resize = true;
 
-  /* The window layout used to be adjusted here, but it now happens in
-   * screenalloc() (also invoked from screenclear()).  That is because the
-   * "recursive" check above may skip this, but not screenalloc(). */
+  /// The window layout used to be adjusted here, but it now happens in
+  /// screenalloc() (also invoked from screenclear()).  That is because the
+  /// recursize "resizing_screen" check above may skip this, but not screenalloc().
 
   if (State != MODE_ASKMORE && State != MODE_EXTERNCMD && State != MODE_CONFIRM) {
     screenclear();
@@ -6928,7 +6838,7 @@ void screen_resize(int width, int height)
     }
     ui_flush();
   }
-  recursive = false;
+  resizing_screen = false;
 }
 
 /// Check if the new Nvim application "shell" dimensions are valid.
diff --git a/src/nvim/screen.h b/src/nvim/screen.h
index 3afbaa5eb6..f3beeff8a9 100644
--- a/src/nvim/screen.h
+++ b/src/nvim/screen.h
@@ -49,14 +49,22 @@ typedef struct {
 } StlClickRecord;
 
 /// Array defining what should be done when tabline is clicked
-extern StlClickDefinition *tab_page_click_defs;
+EXTERN StlClickDefinition *tab_page_click_defs INIT(= NULL);
 
 /// Size of the tab_page_click_defs array
-extern long tab_page_click_defs_size;
+EXTERN long tab_page_click_defs_size INIT(= 0);
 
 #define W_ENDCOL(wp)   ((wp)->w_wincol + (wp)->w_width)
 #define W_ENDROW(wp)   ((wp)->w_winrow + (wp)->w_height)
 
+// While redrawing the screen this flag is set.  It means the screen size
+// ('lines' and 'rows') must not be changed.
+EXTERN bool updating_screen INIT(= 0);
+
+// While resizing the screen this flag is set.
+EXTERN bool resizing_screen INIT(= 0);
+
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "screen.h.generated.h"
 #endif
diff --git a/src/nvim/window.c b/src/nvim/window.c
index 51208e7178..7e7c639a15 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -6263,7 +6263,6 @@ void win_set_inner_size(win_T *wp)
     }
     wp->w_skipcol = 0;
     wp->w_height_inner = height;
-    wp->w_winrow_off = wp->w_border_adj[0] + wp->w_winbar_height;
 
     // There is no point in adjusting the scroll position when exiting.  Some
     // values might be invalid.
@@ -6291,6 +6290,8 @@ void win_set_inner_size(win_T *wp)
 
   wp->w_height_outer = (wp->w_height_inner + win_extra_height(wp));
   wp->w_width_outer = (wp->w_width_inner + win_extra_width(wp));
+  wp->w_winrow_off = wp->w_border_adj[0] + wp->w_winbar_height;
+  wp->w_wincol_off = wp->w_border_adj[3];
 }
 
 static int win_extra_height(win_T *wp)