src/CacheSim/AccessView.elm

@@ -2,21 +2,15 @@ module CacheSim.AccessView exposing (..)
 import CacheSim.Cache exposing (..)
 import CacheSim.Hierarchy exposing (..)
 
-type AccessPosition = Down Int | Up Int | Preview | End
-type alias AccessView =
-    { initialState : CacheHierarchy
-    , blockAddr : BlockAddr
-    , accessEffects : List (AccessEffect Cache)
-    , position : AccessPosition
-    }
+type AccessPosition = Down Int | Up Int | Done
+type alias AccessView = (List (AccessEffect Cache), AccessPosition)
 
 accessPositionForward : Int -> AccessPosition -> AccessPosition
 accessPositionForward depth av =
     case av of
         Down n -> if n == depth - 1 then Up n else Down (n + 1)
-        Up n -> if n == 0 then Preview else Up (n - 1)
-        Preview -> End
-        End -> End
+        Up n -> if n == 0 then Done else Up (n - 1)
+        Done -> Done
 
 accessPositionBack : Int -> AccessPosition -> AccessPosition
 accessPositionBack depth av =
@@ -24,43 +18,41 @@ accessPositionBack depth av =
         Down 0 -> Down 0
         Down n -> Down (n-1)
         Up n -> if n == (depth - 1) then Down n else Up (n + 1)
-        Preview -> Up 0
-        End -> Preview
+        Done -> Up 0
 
 accessPositionDone : AccessPosition -> Bool
 accessPositionDone av =
     case av of
-        End -> True
+        Done -> True
         _ -> False
 
 accessViewForward : AccessView -> AccessView
-accessViewForward av = { av | position = accessPositionForward (List.length av.accessEffects) av.position }
+accessViewForward (l, ap) = (l, accessPositionForward (List.length l) ap)
 
 accessViewBack : AccessView -> AccessView
-accessViewBack av = { av | position = accessPositionBack (List.length av.accessEffects) av.position }
+accessViewBack (l, ap) = (l, accessPositionBack (List.length l) ap)
 
 accessViewDone : AccessView -> Bool
-accessViewDone av = accessPositionDone av.position
+accessViewDone (_, ap) = accessPositionDone ap
 
-finalCacheHierarchy : AccessView -> CacheHierarchy
-finalCacheHierarchy av =
-    List.map .output av.accessEffects ++ List.drop (List.length av.accessEffects) av.initialState
+finalCacheHierarchy : CacheHierarchy -> AccessView -> CacheHierarchy
+finalCacheHierarchy ch (l, ap) =
+    List.map .output l ++ List.drop (List.length l) ch
 
-effectiveCacheHierarchy : AccessView -> CacheHierarchy
-effectiveCacheHierarchy av =
+
+effectiveCacheHierarchy : CacheHierarchy -> AccessView -> CacheHierarchy
+effectiveCacheHierarchy c (l, ap) =
     let
-        finalContents = List.map .output av.accessEffects
-        unaccessed = List.drop (List.length av.accessEffects) av.initialState
+        finalContents = List.map .output l
+        unaccessed = List.drop (List.length l) c
         notDone =
-            case av.position of
-                Preview -> []
-                End -> []
-                Down _ -> List.take (List.length av.accessEffects) av.initialState
-                Up n -> List.take n av.initialState
+            case ap of
+                Done -> []
+                Down _ -> List.take (List.length l) c
+                Up n -> List.take n c
         done =
-            case av.position of
-                Preview -> finalContents
-                End -> finalContents
+            case ap of
+                Done -> finalContents
                 Down _ -> []
                 Up n -> List.drop n finalContents
     in

src/CacheSim/Update.elm

@@ -45,13 +45,8 @@ updateAccess li m =
             case xs of
                 [] -> Ok []
                 (i::t) ->
-                    case accessCacheHierarchy (i // 4) c of
-                        Ok av -> 
-                            let
-                                newView = { blockAddr = i, accessEffects = av, position = Down 0, initialState = c }
-                            in
-                                Result.map ((::) newView)
-                                    <| process (finalCacheHierarchy newView) t
+                    case accessCacheHierarchy i c of
+                        Ok av -> Result.map ((::) (av, Down 0)) <| process (finalCacheHierarchy c (av, Done)) t
                         Err s -> Err s
 
         accessResult = Maybe.andThen (\h -> Result.toMaybe <| process h li) m.hierarchy
@@ -64,15 +59,12 @@ updateAccessViewForward : Model -> (Model, Cmd Msg)
 updateAccessViewForward m =
     let
         afterStep = Maybe.map (intMapUpdate 0 accessViewForward) m.accessView
-        newAccessView =
+        (newHierarchy, newAccessView) =
             case afterStep of
-                Just (result::xs) ->
-                    case (result.position, xs) of
-                        (End, []) -> Nothing
-                        (End, nxs) -> Just nxs
-                        _ -> Just (result::xs)
-                as_ -> as_
-        newModel = { m | accessView = newAccessView }
+                Just ((avs, Done)::[]) -> (Maybe.map (\h -> finalCacheHierarchy h (avs, Done)) m.hierarchy, Nothing)
+                Just ((avs, Done)::xs) -> (Maybe.map (\h -> finalCacheHierarchy h (avs, Done)) m.hierarchy, Just xs)
+                as_ -> (m.hierarchy, as_)
+        newModel = { m | accessView = newAccessView, hierarchy = newHierarchy }
         cmd = Cmd.none
     in
         (newModel, cmd)

src/CacheSim/View.elm

@@ -10,31 +10,34 @@ import Html.Attributes exposing (type_, class, value, for, classList, disabled,
 import Html.Events exposing (onInput, onClick)
 
 -- Button components, powered by Bootstrap
-button : List (Attribute Msg) -> String -> Html Msg
-button attrs s = input ([ type_ "button", value s, class "btn"] ++ attrs) []
+basicButton : List (Attribute Msg) -> String -> Html Msg
+basicButton attrs s = input ([ type_ "button", value s, class "btn", class "btn-info" ] ++ attrs) []
 
-basicButton : Msg -> String -> Html Msg
-basicButton msg s = button [ onClick msg ] s
+disabledButton : String -> Html Msg
+disabledButton = basicButton [ disabled True ]
 
-disabledButton : List (Attribute Msg) -> String -> Html Msg
-disabledButton attrs = button (attrs ++ [ disabled True ])
+advancedButton : List (Attribute Msg) -> String -> Msg -> Html Msg
+advancedButton attrs s m = basicButton (attrs ++ [ onClick m ]) s
+
+button : String -> Msg -> Html Msg
+button s m = basicButton [ onClick m ] s
 
 dangerButton : String -> Msg -> Html Msg
-dangerButton s m = button [ onClick m, class "btn-danger" ] s
+dangerButton = advancedButton [ class "btn-danger" ]
 
 primaryButton : String -> Msg -> Html Msg
-primaryButton s m = button [ onClick m, class "btn-primary" ] s
+primaryButton = advancedButton [ class "btn-primary" ]
 
 secondaryButton : String -> Msg -> Html Msg
-secondaryButton s m = button [ onClick m, class "btn-secondary" ] s
+secondaryButton = advancedButton [ class "btn-secondary" ]
 
-maybeButton : Maybe a -> List (Attribute Msg) -> String -> (a -> Msg) -> Html Msg
-maybeButton m attrs s f =
+maybeButton : Maybe a -> String -> (a -> Msg) -> Html Msg
+maybeButton m s f =
     case m of
-        Just v -> button (attrs ++ [ onClick (f v) ]) s 
-        _ -> disabledButton attrs s 
+        Just v -> button s (f v)
+        _ -> disabledButton s 
 
-resultButton : Result e a -> List (Attribute Msg) -> String -> (a -> Msg) -> Html Msg
+resultButton : Result e a -> String -> (a -> Msg) -> Html Msg
 resultButton = maybeButton << Result.toMaybe
 
 -- Button wrapper (button group)
@@ -102,8 +105,8 @@ viewRawCacheModelHierarchy rcmh =
                 Ok _ -> viewError True ""
                 Err e -> viewError False e
         
-        newButton = primaryButton "Add level" CreateRawModel
-        useButton = resultButton checkedResult [ class "btn-primary" ] "Start simulation" (UseHierarchy << Just) 
+        newButton = button "Add level" CreateRawModel
+        useButton = resultButton checkedResult "Use hierarchy" (UseHierarchy << Just) 
     in
         div []
             [ h2 [] [ text "Cache hierarchy" ]
@@ -160,21 +163,23 @@ viewCacheHierarchy ch =
         
 viewAccessView : Model -> AccessView -> Html Msg
 viewAccessView m av =
-    div []
-        [ h2 [] [ text "Access Simulation" ]
-        , p [] [ text ("Simulating access of address " ++ String.fromInt av.blockAddr) ]
-        , buttonWrapper
-            [ primaryButton "Back" AccessViewBack
-            , primaryButton "Forward" AccessViewForward
-            ]
-        , h3 [] [ text "Access event log" ]
-        , viewAccessLog av
-        , h3 [] [ text "Current cache state" ]
-        , viewCacheHierarchy <| effectiveCacheHierarchy av
-        ]   
+    let
+        currentCache = Maybe.withDefault [] m.hierarchy
+    in
+        div []
+            [ h2 [] [ text "Access Simulation" ]
+            , buttonWrapper
+                [ primaryButton "Back" AccessViewBack
+                , primaryButton "Forward" AccessViewForward
+                ]
+            , h3 [] [ text "Access event log" ]
+            , viewAccessLog av
+            , h3 [] [ text "Current cache state" ]
+            , viewCacheHierarchy <| effectiveCacheHierarchy currentCache av
+            ]   
 
 viewAccessLog : AccessView -> Html Msg
-viewAccessLog av =
+viewAccessLog (aes, ap) =
     let
         resultSpan r =
             span [ classList [ ("badge", True), ("badge-success", r == Hit), ("badge-danger", r == Miss) ] ]
@@ -184,17 +189,14 @@ viewAccessLog av =
             , resultSpan ae.result
             ]
         upEvent n ae = div [ class "event" ]
-            [ text <| "Updated L" ++ String.fromInt (List.length av.accessEffects - n)
+            [ text <| "Updated L" ++ String.fromInt (List.length aes - n)
             ]
         events = 
-            case av.position of
-                Preview -> List.indexedMap downEvent av.accessEffects ++
-                    (List.indexedMap upEvent av.accessEffects) ++
-                    [ div [ class "event" ] [ text "Access complete. Viewing final cache state." ] ]
-                End -> []
-                Down n -> List.indexedMap downEvent <| List.take (n + 1) av.accessEffects
-                Up n -> List.indexedMap downEvent av.accessEffects ++
-                    (List.indexedMap upEvent <| List.drop n av.accessEffects)
+            case ap of
+                Done -> []
+                Down n -> List.indexedMap downEvent <| List.take (n + 1) aes
+                Up n -> List.indexedMap downEvent aes ++
+                    (List.indexedMap upEvent <| List.drop n aes)
     in
         div [] events
 
@@ -202,26 +204,27 @@ viewAccessInput : Model -> Html Msg
 viewAccessInput m =
     let
         parser =
-            Parser.sequence
-            { start = ""
-            , end = ""
-            , separator = ","
-            , spaces = Parser.spaces
-            , item = Parser.int
-            , trailing = Parser.Optional
-            }
+            Parser.map (List.map (\i -> i // 4)) <|
+                Parser.sequence
+                    { start = ""
+                    , end = ""
+                    , separator = ","
+                    , spaces = Parser.spaces
+                    , item = Parser.int
+                    , trailing = Parser.Optional
+                    }
         parseErrorToString _ = "Unable to parse input. Please enter a sequence of numbers separated by commas."
         parseResult = Parser.run (parser |. Parser.end) m.accessInput
         checkedResult =
             case parseResult of
                 Ok is -> if is == [] then Err "Please enter at least one number." else Ok is
                 Err e -> Err <| parseErrorToString e
-        accessButton = resultButton checkedResult [ class "btn-primary" ] "Access address" Access
+        accessButton = resultButton checkedResult "Access address" Access
         errorHtml =
             case checkedResult of
                 Ok _ -> viewError True ""
                 Err e -> viewError False e
-        editHierarchyButton = secondaryButton "Edit hierarchy" (UseHierarchy Nothing)
+        editHierarchyButton = button "Edit hierarchy" (UseHierarchy Nothing)
     in
         div []
             [ h2 [] [ text "Run access simulation" ]
@@ -241,7 +244,7 @@ viewDescription =
         , p []
             [ text <| "To use the simulator, first create a fitting cache configuration by using the \"Add level\" button,"
                 ++ " as well as the settings provided by each individual cache level. When the cache is correctly specified, and"
-                ++ " no warnings appear, click \"Start simulation\" to load the specified hierarchy and begin simulating. To simulate,"
+                ++ " no warnings appear, click \"Use hierarchy\" to load the specified hierarchy and begin simulating. To simulate,"
                 ++ " type a block address into the \"Access address\" field, and click \"Access\". This will bring forward the simulation"
                 ++ " view, which will allow you to step through the steps of accessing a cache."
             ]