Create tui_disasm_window

This introduces the new tui_disasm_window class, which represents a
disassembly window.  It shares a lot of behavior with the source
window, so a new tui_source_window_base class is also created.

gdb/ChangeLog
2019-06-25  Tom Tromey  <tom@tromey.com>

	* tui/tui-data.h (struct tui_source_window_base): New struct.
	(struct tui_source_window): Derive from tui_source_window_base.
	(struct tui_disasm_window): New struct.
	* tui/tui-data.c (tui_source_window_base::clear_detail): Rename
	from tui_source_window::clear_detail.
	(tui_source_window_base): Rename from tui_source_window.
	(~tui_source_window_base): Rename from ~tui_source_window.
	(tui_alloc_win_info): Create a tui_disasm_window.

3 files changed, 51 insertions, 8 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 434d7dd..0525b03 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,16 @@
 2019-06-25  Tom Tromey  <tom@tromey.com>
 
+	* tui/tui-data.h (struct tui_source_window_base): New struct.
+	(struct tui_source_window): Derive from tui_source_window_base.
+	(struct tui_disasm_window): New struct.
+	* tui/tui-data.c (tui_source_window_base::clear_detail): Rename
+	from tui_source_window::clear_detail.
+	(tui_source_window_base): Rename from tui_source_window.
+	(~tui_source_window_base): Rename from ~tui_source_window.
+	(tui_alloc_win_info): Create a tui_disasm_window.
+
+2019-06-25  Tom Tromey  <tom@tromey.com>
+
 	* tui/tui-data.h (struct tui_source_window)
 	(struct tui_data_window): Declare destructors.
 	* tui/tui-data.c (~tui_source_window, ~tui_data_window): New
diff --git a/gdb/tui/tui-data.c b/gdb/tui/tui-data.c
index d24941c..1edf40b 100644
--- a/gdb/tui/tui-data.c
+++ b/gdb/tui/tui-data.c
@@ -176,7 +176,7 @@ tui_add_to_source_windows (struct tui_win_info *win_info)
 /* See tui-data.h.  */
 
 void
-tui_source_window::clear_detail ()
+tui_source_window_base::clear_detail ()
 {
   detail.source_info.gdbarch = NULL;
   detail.source_info.start_line_or_addr.loa = LOA_ADDRESS;
@@ -503,7 +503,7 @@ tui_win_info::tui_win_info (enum tui_win_type type)
   tui_init_generic_part (&generic);
 }
 
-tui_source_window::tui_source_window (enum tui_win_type type)
+tui_source_window_base::tui_source_window_base (enum tui_win_type type)
   : tui_win_info (type)
 {
   gdb_assert (type == SRC_WIN || type == DISASSEM_WIN);
@@ -539,8 +539,10 @@ tui_alloc_win_info (enum tui_win_type type)
   switch (type)
     {
     case SRC_WIN:
+      return new tui_source_window ();
+
     case DISASSEM_WIN:
-      return new tui_source_window (type);
+      return new tui_disasm_window ();
 
     case DATA_WIN:
       return new tui_data_window ();
@@ -617,7 +619,7 @@ tui_add_content_elements (struct tui_gen_win_info *win_info,
   return index_start;
 }
 
-tui_source_window::~tui_source_window ()
+tui_source_window_base::~tui_source_window_base ()
 {
   if (detail.source_info.fullname)
     {
diff --git a/gdb/tui/tui-data.h b/gdb/tui/tui-data.h
index 7adeb56..e09aad6 100644
--- a/gdb/tui/tui-data.h
+++ b/gdb/tui/tui-data.h
@@ -291,15 +291,45 @@ public:
   int is_highlighted = 0;
 };
 
-struct tui_source_window : public tui_win_info
+/* The base class for all source-like windows, namely the source and
+   disassembly windows.  */
+
+struct tui_source_window_base : public tui_win_info
 {
-  explicit tui_source_window (enum tui_win_type type);
-  ~tui_source_window () override;
-  DISABLE_COPY_AND_ASSIGN (tui_source_window);
+protected:
+  explicit tui_source_window_base (enum tui_win_type type);
+  ~tui_source_window_base () override;
+  DISABLE_COPY_AND_ASSIGN (tui_source_window_base);
+
+public:
 
   void clear_detail () override;
 };
 
+/* A TUI source window.  */
+
+struct tui_source_window : public tui_source_window_base
+{
+  tui_source_window ()
+    : tui_source_window_base (SRC_WIN)
+  {
+  }
+
+  DISABLE_COPY_AND_ASSIGN (tui_source_window);
+};
+
+/* A TUI disassembly window.  */
+
+struct tui_disasm_window : public tui_source_window_base
+{
+  tui_disasm_window ()
+    : tui_source_window_base (DISASSEM_WIN)
+  {
+  }
+
+  DISABLE_COPY_AND_ASSIGN (tui_disasm_window);
+};
+
 struct tui_data_window : public tui_win_info
 {
   tui_data_window ();