From b7e9966907434c6f58efa1307b2118a470c63d2b Mon Sep 17 00:00:00 2001
From: Jeffrey Armstrong <jeff@approximatrix.com>
Date: Wed, 6 May 2020 15:56:17 -0400
Subject: Back functionality now works

---
 dumb_render.f90 | 4 +++-
 history.f90     | 8 ++++++--
 main.F90        | 7 ++++++-
 render.f90      | 3 ++-
 4 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/dumb_render.f90 b/dumb_render.f90
index 9172557..e6ca671 100644
--- a/dumb_render.f90
+++ b/dumb_render.f90
@@ -258,7 +258,7 @@ contains
     
         character(*), intent(out)::input
     
-        write(*, '(A68)', advance='no') "*** [A] PgUp  |  [Z] PgDn  |  [#] Link  |  [U] URL  |  [Q] Quit => "
+        write(*, '(A68)', advance='no') "*** [A]/[Z] PgUp/PgDn | [#] Link | [B] Back | [U] URL | [Q] Quit => "
         read(*, *) input
         
     end subroutine prompt_user
@@ -285,6 +285,8 @@ contains
         else if(trim(input) == "z" .or. trim(input) == "Z") then
             self%first_line = self%first_line + 24
             dumb_action = render_action_layout
+        else if(trim(input) == "b" .or. trim(input) == "B") then
+            dumb_action = render_action_back
         else if(trim(input) == "q" .or. trim(input) == "Q") then
             dumb_action = render_action_quit
         else if(trim(input) == "u" .or. trim(input) == "U") then
diff --git a/history.f90 b/history.f90
index d8193f8..e915855 100644
--- a/history.f90
+++ b/history.f90
@@ -67,16 +67,20 @@ contains
     
         last => last_location(first_location)
         if(associated(last)) then
-            url = last%url
             
             if(.not. associated(last, first_location)) then
                 new_last => first_location
                 do while(.not. associated(new_last%next, last))
                     new_last => new_last%next
                 end do
-                new_last%next => null()
                 deallocate(last)
+            else
+                new_last => first_location
             end if
+            
+            new_last%next => null()
+            url = new_last%url
+            
         end if
         
     end subroutine back_location
diff --git a/main.F90 b/main.F90
index f31a3ca..66e6d57 100644
--- a/main.F90
+++ b/main.F90
@@ -116,7 +116,12 @@ implicit none
             select case(r%request_action(input))
                 case (render_action_quit)
                     running = .false.
-                    
+                
+                case (render_action_back)
+                    call back_location(locations_visited, current_url)
+                    call free_lines(first_line)
+                    loaded = .false.
+                
                 case (render_action_layout)
                     call r%report_status("Performing Layout")
                     call layout_lines(first_line, r)
diff --git a/render.f90 b/render.f90
index 405fff9..578948c 100644
--- a/render.f90
+++ b/render.f90
@@ -4,7 +4,8 @@ implicit none
     integer, parameter::render_action_none   = 1
     integer, parameter::render_action_goto   = 2
     integer, parameter::render_action_layout = 3
-    integer, parameter::render_action_quit   = 4
+    integer, parameter::render_action_back   = 4
+    integer, parameter::render_action_quit   = 5
 
     type, abstract :: renderer
     
-- 
cgit v1.2.3