feat: add global diagram settings + update arrow colors + update unit tests resources accordingly

Author: Pascal Dal Farra

spring-statemachine-uml/src/main/java/org/springframework/statemachine/plantuml/PlantUmlWriter.java

@@ -153,15 +153,10 @@ public String toPlantUml(
         historyStatesToHistoryId = StateMachineHelper.collectHistoryStates(stateMachine);
         historyTransitions = new ArrayList<>();
 
-        StringBuilder sb = new StringBuilder();
-        sb.append("""
-                @startuml
-                'https://plantuml.com/state-diagram
-                                
-                'hide description area for state without description
-                hide empty description
-                                
-                """);
+        StringBuilder sb = new StringBuilder("@startuml\n")
+                .append(PlantUmlWriterParameters.getStateDiagramSettings(plantUmlWriterParameters))
+                .append("\n");
+
 
         // 2nd pass: processing statemachine AND collecting history transitions in 'historyTransitions
         processRegion(stateMachine, stateContext, plantUmlWriterParameters, sb, "", null);
@@ -651,7 +646,7 @@ private void processPseudoStatesTransition(
         S target = targetState.getId();
         sb.append("""
                 %s%s
-                %s%s -%s[%s]-> %s %s
+                %s%s -%s%s-> %s %s
                 """
                 .formatted(
                         indent,
@@ -746,7 +741,7 @@ private void addTransition(
             Transition<S, E> transition
     ) {
         sb.append("""
-                %s%s -%s[%s]-> %s %s
+                %s%s -%s%s-> %s %s
                 """
                 .formatted(
                         indent,

spring-statemachine-uml/src/main/java/org/springframework/statemachine/plantuml/PlantUmlWriterParameters.java

@@ -1,9 +1,6 @@
 package org.springframework.statemachine.plantuml;
 
-import lombok.Builder;
-import lombok.EqualsAndHashCode;
-import lombok.Getter;
-import lombok.Value;
+import lombok.*;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.lang.Nullable;
@@ -21,7 +18,48 @@ public class PlantUmlWriterParameters<S> {
 
     private static final Log log = LogFactory.getLog(PlantUmlWriterParameters.class);
 
-    // TODO add hidden arrows  'S1 -[hidden]-> S2'
+    public static final String DEFAULT_STATE_DIAGRAM_SETTINGS = """
+            'https://plantuml.com/state-diagram
+                        
+            'hide description area for state without description
+            hide empty description
+                        
+            'https://plantuml.com/fr/skinparam
+            'https://plantuml-documentation.readthedocs.io/en/latest/formatting/all-skin-params.html
+            'https://plantuml.com/fr/color
+            skinparam BackgroundColor white
+            skinparam DefaultFontColor black
+            'skinparam DefaultFontName Impact
+            skinparam DefaultFontSize 14
+            skinparam DefaultFontStyle Normal
+            skinparam NoteBackgroundColor #FEFFDD
+            skinparam NoteBorderColor black
+                        
+            skinparam state {
+              ArrowColor black
+              BackgroundColor #F1F1F1
+              BorderColor #181818
+              FontColor black
+            '  FontName Impact
+              FontSize 14
+              FontStyle Normal
+            }
+            """;
+
+    @Setter
+    private String stateDiagramSettings = DEFAULT_STATE_DIAGRAM_SETTINGS;
+
+    public static String getStateDiagramSettings(@Nullable PlantUmlWriterParameters<?> plantUmlWriterParameters) {
+        return plantUmlWriterParameters == null
+                ? DEFAULT_STATE_DIAGRAM_SETTINGS
+                : plantUmlWriterParameters.getStateDiagramSettings();
+    }
+
+    private String getStateDiagramSettings() {
+        return stateDiagramSettings == null
+                ? ""
+                : stateDiagramSettings;
+    }
 
     /**
      * Direction of an arrow connecting 2 States
@@ -206,7 +244,7 @@ public String getStateColor(S state, @Nullable S currentState) {
     }
 
     public String getArrowColor(boolean isCurrentTransaction) {
-        return isCurrentTransaction ? "#FF0000" : "#000000";
+        return isCurrentTransaction ? "[#FF0000]" : "";
     }
 
 }

spring-statemachine-uml/src/test/java/org/springframework/statemachine/plantuml/PlantUmlWriterTest.java

@@ -110,6 +110,15 @@ void plantUmlTest(String resourcePath, PlantUmlWriterParameters<String> plantUml
         // make umlStateMachineModelFactory aware of beans available in BeansForUmlFiles.class
         umlStateMachineModelFactory.setBeanFactory(context);
 
+        if (plantUmlWriterParameters == null) {
+            plantUmlWriterParameters = new PlantUmlWriterParameters<>();
+        }// setting some PlantUml parameters
+        plantUmlWriterParameters.setStateDiagramSettings("""
+                'https://plantuml.com/state-diagram
+                
+                'hide description area for state without description
+                hide empty description
+                """);
         // Dumping statemachine to PlantUml diagram
         String stateMachineAsPlantUML = new PlantUmlWriter<String, String>()
                 .toPlantUml(

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/action-with-transition-choice.puml

@@ -18,13 +18,13 @@ state S5
 state S6
 
 
-[*] -[#000000]-> S1
-S1 -down[#000000]-> CHOICE1 : E1\n/ s1ToChoice
-CHOICE1 -down[#000000]-> CHOICE2 : [choice2Guard]\n/ choice1ToChoice2
-CHOICE2 -down[#000000]-> S6 : / choiceToS6
-CHOICE2 -down[#000000]-> S5 : [s5Guard]\n/ choiceToS5
-CHOICE1 -down[#000000]-> S4 : / choiceToS4
-CHOICE1 -down[#000000]-> S3 : [s3Guard]
-CHOICE1 -down[#000000]-> S2 : [s2Guard]\n/ choiceToS2
+[*] --> S1
+CHOICE1 -down-> CHOICE2 : [choice2Guard]\n/ choice1ToChoice2
+CHOICE1 -down-> S2 : [s2Guard]\n/ choiceToS2
+CHOICE1 -down-> S3 : [s3Guard]
+CHOICE1 -down-> S4 : / choiceToS4
+CHOICE2 -down-> S5 : [s5Guard]\n/ choiceToS5
+CHOICE2 -down-> S6 : / choiceToS6
+S1 -down-> CHOICE1 : E1\n/ s1ToChoice
 
 @enduml

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/action-with-transition-junction.puml

@@ -18,13 +18,13 @@ state S5
 state S6
 
 
-[*] -[#000000]-> S1
-S1 -down[#000000]-> JUNCTION1 : E1\n/ s1ToChoice
-JUNCTION1 -down[#000000]-> JUNCTION2 : [choice2Guard]\n/ choice1ToChoice2
-JUNCTION2 -down[#000000]-> S6 : / choiceToS6
-JUNCTION2 -down[#000000]-> S5 : [s5Guard]\n/ choiceToS5
-JUNCTION1 -down[#000000]-> S4 : / choiceToS4
-JUNCTION1 -down[#000000]-> S3 : [s3Guard]
-JUNCTION1 -down[#000000]-> S2 : [s2Guard]\n/ choiceToS2
+[*] --> S1
+JUNCTION1 -down-> JUNCTION2 : [choice2Guard]\n/ choice1ToChoice2
+JUNCTION1 -down-> S2 : [s2Guard]\n/ choiceToS2
+JUNCTION1 -down-> S3 : [s3Guard]
+JUNCTION1 -down-> S4 : / choiceToS4
+JUNCTION2 -down-> S5 : [s5Guard]\n/ choiceToS5
+JUNCTION2 -down-> S6 : / choiceToS6
+S1 -down-> JUNCTION1 : E1\n/ s1ToChoice
 
 @enduml

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/broken-model-shadowentries.puml

@@ -8,7 +8,7 @@ state S1
 state S2
 
 
-[*] -[#000000]-> S1
-S1 -down[#000000]-> S2
+[*] --> S1
+S1 -down-> S2
 
 @enduml

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/initial-actions.puml

@@ -8,7 +8,7 @@ state S1
 state S2
 
 
-[*] -[#000000]-> S1 : / initialAction
-S1 -down[#000000]-> S2 : E1
+[*] --> S1 : / initialAction
+S1 -down-> S2 : E1
 
 @enduml

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/missingname-choice.puml

@@ -13,10 +13,10 @@ state choice1 <<choice>>
 note left of choice1 : choice1
 
 
-[*] -[#000000]-> S1
-S1 -down[#000000]-> choice1 : E1
-choice1 -down[#000000]-> S2 : [s2Guard]
-choice1 -down[#000000]-> S3 : [s3Guard]
-choice1 -down[#000000]-> S4
+[*] --> S1
+S1 -down-> choice1 : E1
+choice1 -down-> S2 : [s2Guard]
+choice1 -down-> S3 : [s3Guard]
+choice1 -down-> S4
 
 @enduml

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/multijoin-forkjoin.puml

@@ -12,12 +12,12 @@ state S2  {
   state S21
 
 
-  [*] -[#000000]-> S20
+  [*] --> S20
   state S30
   state S31
 
 
-  [*] -[#000000]-> S30
+  [*] --> S30
 }
 'S3 <<JOIN>>
 state S3 <<join>>
@@ -29,17 +29,17 @@ note left of SF : SF
 state SI
 
 
-S1 -down[#000000]-> S20
+S1 -down-> S20
 
-S1 -down[#000000]-> S30
+S1 -down-> S30
 
-[*] -[#000000]-> SI
-S20 -down[#000000]-> S21 : E2
-S30 -down[#000000]-> S31 : E3
-SI -down[#000000]-> S1 : E1
-S31 -down[#000000]-> S3
-S21 -down[#000000]-> S3
-S3 -down[#000000]-> S4 : [extendedState.variables.isEmpty()]
-S3 -down[#000000]-> SF : [!extendedState.variables.isEmpty()]
+[*] --> SI
+S20 -down-> S21 : E2
+S21 -down-> S3
+S30 -down-> S31 : E3
+S31 -down-> S3
+S3 -down-> S4 : [extendedState.variables.isEmpty()]
+S3 -down-> SF : [!extendedState.variables.isEmpty()]
+SI -down-> S1 : E1
 
 @enduml

spring-statemachine-uml/src/test/resources/org/springframework/statemachine/uml/pseudostate-in-submachine.puml

@@ -12,12 +12,12 @@ state S1  {
   state S12
 
 
-  [*] -[#000000]-> S11
+  [*] --> S11
 }
 
 
-[*] -[#000000]-> S1
-S11 -down[#000000]-> CHOICE
-CHOICE -down[#000000]-> S12
+[*] --> S1
+CHOICE -down-> S12
+S11 -down-> CHOICE
 
 @enduml