diff --git a/gdb/tui/tui-disasm.c b/gdb/tui/tui-disasm.c
index 221e48e661a..2a291831e27 100644
--- a/gdb/tui/tui-disasm.c
+++ b/gdb/tui/tui-disasm.c
@@ -162,11 +162,12 @@ tui_find_disassembly_address (struct gdbarch *gdbarch, CORE_ADDR pc, int from)
 
 /* Function to set the disassembly window's content.  */
 enum tui_status
-tui_set_disassem_content (tui_source_window_base *win_info,
-			  struct gdbarch *gdbarch, CORE_ADDR pc)
+tui_disasm_window::set_contents (struct gdbarch *arch,
+				 struct symtab *s,
+				 struct tui_line_or_address line_or_addr)
 {
   int i;
-  int offset = win_info->horizontal_offset;
+  int offset = horizontal_offset;
   int max_lines, line_width;
   CORE_ADDR cur_pc;
   struct tui_locator_window *locator = tui_locator_win_info_ptr ();
@@ -176,17 +177,19 @@ tui_set_disassem_content (tui_source_window_base *win_info,
   int addr_size, insn_size;
   char *line;
   
+  gdb_assert (line_or_addr.loa == LOA_ADDRESS);
+  CORE_ADDR pc = line_or_addr.u.addr;
   if (pc == 0)
     return TUI_FAILURE;
 
-  win_info->gdbarch = gdbarch;
-  win_info->start_line_or_addr.loa = LOA_ADDRESS;
-  win_info->start_line_or_addr.u.addr = pc;
+  gdbarch = arch;
+  start_line_or_addr.loa = LOA_ADDRESS;
+  start_line_or_addr.u.addr = pc;
   cur_pc = locator->addr;
 
   /* Window size, excluding highlight box.  */
-  max_lines = win_info->height - 2;
-  line_width = win_info->width - 2;
+  max_lines = height - 2;
+  line_width = width - 2;
 
   /* Get temporary table that will hold all strings (addr & insn).  */
   asm_lines = XALLOCAVEC (struct tui_asm_line, max_lines);
@@ -216,12 +219,12 @@ tui_set_disassem_content (tui_source_window_base *win_info,
   line = (char*) alloca (insn_pos + insn_size + 1);
 
   /* Now construct each line.  */
-  win_info->content.resize (max_lines);
+  content.resize (max_lines);
   for (i = 0; i < max_lines; i++)
     {
       int cur_len;
 
-      tui_source_element *src = &win_info->content[i];
+      tui_source_element *src = &content[i];
       strcpy (line, asm_lines[i].addr_string);
       cur_len = strlen (line);
       memset (line + cur_len, ' ', insn_pos - cur_len);
diff --git a/gdb/tui/tui-disasm.h b/gdb/tui/tui-disasm.h
index 0ebe42acb0a..d9895322487 100644
--- a/gdb/tui/tui-disasm.h
+++ b/gdb/tui/tui-disasm.h
@@ -57,14 +57,17 @@ protected:
 
   void do_scroll_vertical (int num_to_scroll) override;
 
+  enum tui_status set_contents
+    (struct gdbarch *gdbarch,
+     struct symtab *s,
+     struct tui_line_or_address line_or_addr) override;
+
 private:
   /* Answer whether a particular line number or address is displayed
      in the current source window.  */
   bool addr_is_displayed (CORE_ADDR addr) const;
 };
 
-extern enum tui_status tui_set_disassem_content (tui_source_window_base *,
-						 struct gdbarch *, CORE_ADDR);
 extern void tui_show_disassem (struct gdbarch *, CORE_ADDR);
 extern void tui_show_disassem_and_update_source (struct gdbarch *, CORE_ADDR);
 extern void tui_get_begin_asm_address (struct gdbarch **, CORE_ADDR *);
diff --git a/gdb/tui/tui-source.c b/gdb/tui/tui-source.c
index f08bd88aeff..9eb7c48472e 100644
--- a/gdb/tui/tui-source.c
+++ b/gdb/tui/tui-source.c
@@ -123,10 +123,13 @@ copy_source_line (const char **ptr, int line_no, int first_col,
 
 /* Function to display source in the source window.  */
 enum tui_status
-tui_set_source_content (tui_source_window_base *win_info,
-			struct symtab *s, 
-			int line_no)
+tui_source_window::set_contents (struct gdbarch *arch,
+				 struct symtab *s, 
+				 struct tui_line_or_address line_or_addr)
 {
+  gdb_assert (line_or_addr.loa == LOA_LINE);
+  int line_no = line_or_addr.u.line_no;
+
   enum tui_status ret = TUI_FAILURE;
 
   if (s != NULL)
@@ -134,10 +137,10 @@ tui_set_source_content (tui_source_window_base *win_info,
       int line_width, nlines;
 
       ret = TUI_SUCCESS;
-      line_width = win_info->width - 1;
+      line_width = width - 1;
       /* Take hilite (window border) into account, when
 	 calculating the number of lines.  */
-      nlines = (line_no + (win_info->height - 2)) - line_no;
+      nlines = (line_no + (height - 2)) - line_no;
 
       std::string srclines;
       if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
@@ -150,28 +153,27 @@ tui_set_source_content (tui_source_window_base *win_info,
 	    = tui_locator_win_info_ptr ();
 	  const char *s_filename = symtab_to_filename_for_display (s);
 
-	  xfree (win_info->title);
-	  win_info->title = xstrdup (s_filename);
+	  xfree (title);
+	  title = xstrdup (s_filename);
 
-	  xfree (win_info->fullname);
-	  win_info->fullname = xstrdup (symtab_to_fullname (s));
+	  xfree (fullname);
+	  fullname = xstrdup (symtab_to_fullname (s));
 
 	  cur_line = 0;
-	  win_info->gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s));
-	  win_info->start_line_or_addr.loa = LOA_LINE;
-	  cur_line_no = win_info->start_line_or_addr.u.line_no = line_no;
+	  gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s));
+	  start_line_or_addr.loa = LOA_LINE;
+	  cur_line_no = start_line_or_addr.u.line_no = line_no;
 
 	  const char *iter = srclines.c_str ();
-	  win_info->content.resize (nlines);
+	  content.resize (nlines);
 	  while (cur_line < nlines)
 	    {
 	      struct tui_source_element *element
-		= &win_info->content[cur_line];
+		= &content[cur_line];
 
 	      std::string text;
 	      if (*iter != '\0')
-		text = copy_source_line (&iter, cur_line_no,
-					 win_info->horizontal_offset,
+		text = copy_source_line (&iter, cur_line_no, horizontal_offset,
 					 line_width);
 
 	      /* Set whether element is the execution point
@@ -183,8 +185,8 @@ tui_set_source_content (tui_source_window_base *win_info,
 				 symtab_to_fullname (s)) == 0
 		   && cur_line_no == locator->line_no);
 
-	      xfree (win_info->content[cur_line].line);
-	      win_info->content[cur_line].line
+	      xfree (content[cur_line].line);
+	      content[cur_line].line
 		= xstrdup (text.c_str ());
 
 	      cur_line++;
diff --git a/gdb/tui/tui-source.h b/gdb/tui/tui-source.h
index 1d7af2aad83..c623f5e2941 100644
--- a/gdb/tui/tui-source.h
+++ b/gdb/tui/tui-source.h
@@ -60,6 +60,11 @@ protected:
 
   void do_scroll_vertical (int num_to_scroll) override;
 
+  enum tui_status set_contents
+    (struct gdbarch *gdbarch,
+     struct symtab *s,
+     struct tui_line_or_address line_or_addr) override;
+
 private:
 
   void style_changed ();
@@ -72,9 +77,6 @@ private:
   gdb::observers::token m_observable;
 };
 
-extern enum tui_status tui_set_source_content (tui_source_window_base *,
-					       struct symtab *, 
-					       int);
 extern void tui_show_symtab_source (tui_source_window_base *,
 				    struct gdbarch *, struct symtab *,
 				    struct tui_line_or_address);
diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
index d0e18791e4a..3a678f2b531 100644
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -88,12 +88,8 @@ tui_source_window_base::update_source_window_as_is
    struct symtab *s,
    struct tui_line_or_address line_or_addr)
 {
-  enum tui_status ret;
-
-  if (type == SRC_WIN)
-    ret = tui_set_source_content (this, s, line_or_addr.u.line_no);
-  else
-    ret = tui_set_disassem_content (this, gdbarch, line_or_addr.u.addr);
+  enum tui_status ret
+    = set_contents (gdbarch, s, line_or_addr);
 
   if (ret == TUI_FAILURE)
     erase_source_content ();
diff --git a/gdb/tui/tui-winsource.h b/gdb/tui/tui-winsource.h
index 30b29ca8fdc..85e83021be1 100644
--- a/gdb/tui/tui-winsource.h
+++ b/gdb/tui/tui-winsource.h
@@ -104,6 +104,11 @@ protected:
 
   void rerender () override;
 
+  virtual enum tui_status set_contents
+    (struct gdbarch *gdbarch,
+     struct symtab *s,
+     struct tui_line_or_address line_or_addr) = 0;
+
 public:
 
   void clear_detail ();
