Move some code out of tui-data.h

This moves some code out of tui-data.h, to more closely related
places.  Some unused forward declarations are also removed.

gdb/ChangeLog
2020-07-01  Tom Tromey  <tom@tromey.com>

	* tui/tui-stack.c (SINGLE_KEY): Move from tui-data.h
	* tui/tui-winsource.h (enum tui_line_or_address_kind)
	(struct tui_line_or_address): Move from tui-data.h.
	* tui/tui-win.c (DEFAULT_TAB_LEN): Move from tui-data.h.
	* tui/tui-data.h (DEFAULT_TAB_LEN): Move to tui-win.c.
	(tui_cmd_window, tui_source_window_base, tui_source_window)
	(tui_disasm_window): Don't declare.
	(enum tui_line_or_address_kind, struct tui_line_or_address): Move
	to tui-winsource.h.
	(SINGLE_KEY): Move to tui-stack.c.

4 files changed, 22 insertions, 26 deletions

diff --git a/gdb/tui/tui-data.h b/gdb/tui/tui-data.h
index 1accf36..d96384f 100644
--- a/gdb/tui/tui-data.h
+++ b/gdb/tui/tui-data.h
@@ -26,11 +26,6 @@
 #include "gdb_curses.h"	/* For WINDOW.  */
 #include "observable.h"
 
-struct tui_cmd_window;
-struct tui_source_window_base;
-struct tui_source_window;
-struct tui_disasm_window;
-
 /* A deleter that calls delwin.  */
 struct curses_deleter
 {
@@ -125,7 +120,6 @@ public:
 };
 
 /* Constant definitions.  */
-#define DEFAULT_TAB_LEN         8
 #define SRC_NAME                "src"
 #define CMD_NAME                "cmd"
 #define DATA_NAME               "regs"
@@ -133,26 +127,6 @@ public:
 #define STATUS_NAME		"status"
 #define MIN_WIN_HEIGHT          3
 
-/* Strings to display in the TUI status line.  */
-#define SINGLE_KEY              "(SingleKey)"
-
-enum tui_line_or_address_kind
-{
-  LOA_LINE,
-  LOA_ADDRESS
-};
-
-/* Structure describing source line or line address.  */
-struct tui_line_or_address
-{
-  enum tui_line_or_address_kind loa;
-  union
-    {
-      int line_no;
-      CORE_ADDR addr;
-    } u;
-};
-
 /* This defines information about each logical window.  */
 struct tui_win_info : public tui_gen_win_info
 {
diff --git a/gdb/tui/tui-stack.c b/gdb/tui/tui-stack.c
index f1e075a..8bd7880 100644
--- a/gdb/tui/tui-stack.c
+++ b/gdb/tui/tui-stack.c
@@ -43,6 +43,9 @@
 #define LINE_PREFIX             "L"
 #define PC_PREFIX               "PC: "
 
+/* Strings to display in the TUI status line.  */
+#define SINGLE_KEY              "(SingleKey)"
+
 /* Minimum/Maximum length of some fields displayed in the TUI status
    line.  */
 #define MIN_LINE_WIDTH     4	/* Use at least 4 digits for line
diff --git a/gdb/tui/tui-win.c b/gdb/tui/tui-win.c
index a78837f..5f56eca 100644
--- a/gdb/tui/tui-win.c
+++ b/gdb/tui/tui-win.c
@@ -753,6 +753,8 @@ tui_refresh_all_command (const char *arg, int from_tty)
   tui_refresh_all_win ();
 }
 
+#define DEFAULT_TAB_LEN         8
+
 /* The tab width that should be used by the TUI.  */
 
 unsigned int tui_tab_width = DEFAULT_TAB_LEN;
diff --git a/gdb/tui/tui-winsource.h b/gdb/tui/tui-winsource.h
index 501dd31..fab1487 100644
--- a/gdb/tui/tui-winsource.h
+++ b/gdb/tui/tui-winsource.h
@@ -25,6 +25,23 @@
 #include "tui/tui-data.h"
 #include "symtab.h"
 
+enum tui_line_or_address_kind
+{
+  LOA_LINE,
+  LOA_ADDRESS
+};
+
+/* Structure describing source line or line address.  */
+struct tui_line_or_address
+{
+  enum tui_line_or_address_kind loa;
+  union
+    {
+      int line_no;
+      CORE_ADDR addr;
+    } u;
+};
+
 /* Flags to tell what kind of breakpoint is at current line.  */
 enum tui_bp_flag
 {