add standard prefix for error messaged

dist/xbin/ContactInfo.properties

@@ -5,4 +5,6 @@ textio.user.interrupt.key = ctrl Q
 textio.prompt.color = #2fe040
 textio.input.color = yellow
 
+textio.error.prompt.color = red
+
 textio.pane.width = 760

dist/xbin/Cuboid.properties

@@ -2,6 +2,8 @@
 
 textio.user.interrupt.key = ctrl Q
 
+textio.error.prompt.color = red
+
 textio.custom.neutral.prompt.color = white
 textio.custom.neutral.prompt.bgcolor = black
 textio.custom.neutral.input.color = white

dist/xbin/ECommerce.properties

@@ -2,4 +2,6 @@
 
 textio.user.interrupt.key = ctrl Q
 
+textio.error.prompt.color = red
+
 # textio.pane.bgcolor = #004400

dist/xbin/ShoppingList.properties

@@ -2,7 +2,22 @@
 
 textio.user.interrupt.key = ctrl Q
 
-textio.prompt.color = #2fe040
-textio.input.color = yellow
+textio.prompt.color = cyan
+textio.input.color = white
+
+textio.error.prompt.color = red
+
+textio.help.prompt.color = pink
+jline.help.prompt.color = magenta
+
+textio.abort.prompt.color = orange
+jline.abort.prompt.color = red
+
+textio.content.prompt.color = lightblue
+jline.content.prompt.color = white
+
+textio.product.prompt.color = #2fe040
+textio.product.input.color = yellow
+
 
 textio.pane.width = 760

dist/xbin/UserDataCollector.properties

@@ -23,8 +23,11 @@ textio.input.color = yellow
 # textio.input.bold = true
 # textio.input.superscript = true
 
+textio.error.prompt.color = red
+
 # swing.prompt.color = #22ff88
-textio.pane.bgcolor = #002f00
+# textio.pane.bgcolor = #00002f
+textio.pane.width = 840
 textio.pane.title = User Data Collector
 textio.pane.icon.file = data.png
 # textio.pane.icon.resource = /your/resource/path/data.png

dist/xbin/Weather.properties

@@ -5,4 +5,11 @@ textio.user.interrupt.key = ctrl Q
 textio.prompt.color = #2fe040
 textio.input.color = yellow
 
+textio.prompt.style.class = textterm-white-space-normal
+textio.pre.prompt.style.class = textterm-white-space-pre
+
+textio.error.prompt.color = red
+
+textio.exit.prompt.color = cyan
+
 textio.pane.width = 720

doc/user_guide.adoc

@@ -88,7 +88,9 @@ displaying a help text, saving the data collected so far, aborting the current r
 
 TIP: Look at the
 link:{blob-root}/text-io-demo/src/main/java/org/beryx/textio/demo/app/ShoppingList.java[ShoppingList]
-example in the
+and
+link:{blob-root}/text-io-demo/src/main/java/org/beryx/textio/demo/app/ContactInfo.java[ContactInfo]
+examples in the
 https://github.com/beryx/text-io/releases/download/v{project-version}/textio-demo-{project-version}.zip[demo application]
 for usage details.
 
@@ -350,7 +352,7 @@ The second message will appear in red, while the other two will be printed in cy
 The code above uses hard-coded property values.
 A more elegant solution is to specify these values in the `textio.properties` file.
 TextTerminal offers the
-link:javadoc/org/beryx/textio/TextTerminal.html#executeWithPropertiesPrefix-java.util.function.Consumer-java.util.function.Consumer-[executeWithPropertiesConfigurator()]
+link:javadoc/org/beryx/textio/TextTerminal.html#executeWithPropertiesPrefix-java.lang.String-java.util.function.Consumer-[executeWithPropertiesPrefix()]
 convenience method to help you accomplish this task.
 
 Consider the code below:
@@ -373,6 +375,16 @@ TIP: Look at the source code of
 link:{blob-root}/text-io-demo/src/main/java/org/beryx/textio/demo/app/Cuboid.java[Cuboid.java]
 for an example of using temporary TextTerminal properties.
 
+[[error_message_props]]
+==== Error message prefix
+When printing error messages, an InputReader temporarily changes the TextTerminal properties using the prefix `error`.
+For example, in order to have error messages displayed in red, you can insert the following line into `textio.properties`:
+[source]
+----
+textio.error.prompt.color = red
+----
+
+
 [[input_reader_props]]
 === InputReader-specific properties
 

text-io-demo/src/main/java/org/beryx/textio/demo/app/ShoppingList.java

@@ -62,7 +62,7 @@ public void accept(TextIO textIO, RunnerData runnerData) {
         });
 
         boolean registeredHelp = terminal.registerHandler(keyStrokeHelp, t -> {
-            terminal.executeWithPropertiesConfigurator(props -> props.setPromptColor("cyan"),
+            terminal.executeWithPropertiesPrefix("help",
                     tt -> tt.print("\n\nType the name of a product to be included in your shopping list."));
             return new ReadHandlerData(ReadInterruptionStrategy.Action.RESTART).withRedrawRequired(true);
         });
@@ -95,13 +95,15 @@ public void accept(TextIO textIO, RunnerData runnerData) {
             while(true) {
                 String product;
                 try {
-                    product = textIO.newStringInputReader().read("product");
+                    product = textIO.newStringInputReader().withPropertiesPrefix("product").read("product");
                 } catch (ReadAbortedException e) {
-                    terminal.println("\nRead aborted by user " + e.getPayload());
+                    terminal.executeWithPropertiesPrefix("abort",
+                            t -> t.println("\nRead aborted by user " + e.getPayload()));
                     break;
                 }
                 products.add(product);
-                terminal.println("Your shopping list contains: " + products.stream().collect(Collectors.joining(", ")));
+                String content = products.stream().collect(Collectors.joining(", "));
+                terminal.executeWithPropertiesPrefix("content", t ->t.println("Your shopping list contains: " + content));
                 terminal.println();
             }
         }

text-io-demo/src/main/java/org/beryx/textio/demo/app/Weather.java

@@ -67,20 +67,21 @@ public void accept(TextIO textIO, RunnerData runnerData) {
             terminal.resetToBookmark("MAIN");
 
             terminal.getProperties().put(PropertiesConstants.PROP_PROMPT_STYLE_CLASS, "textterm-white-space-pre");
-            terminal.println("-------------------------------------------------------");
-            terminal.println("  Temperature      Wind speed      Atmospheric pressure");
-            terminal.println("-------------------------------------------------------");
-            for(int i=0; i<20; i++) {
-                terminal.moveToLineStart();
-                delay(80);
-                terminal.print(getData());
-                delay(400);
-            }
-            terminal.getProperties().put(PropertiesConstants.PROP_PROMPT_STYLE_CLASS, "textterm-white-space-normal");
+            terminal.executeWithPropertiesPrefix("pre", t -> {
+                t.println("-------------------------------------------------------");
+                t.println("  Temperature      Wind speed      Atmospheric pressure");
+                t.println("-------------------------------------------------------");
+                for(int i=0; i<20; i++) {
+                    t.moveToLineStart();
+                    delay(80);
+                    t.print(getData());
+                    delay(400);
+                }
+            });
             terminal.println();terminal.println();terminal.println();
 
             if(!textIO.newBooleanInputReader()
-                    .withPropertiesConfigurator(props -> props.setPromptColor("cyan"))
+                    .withPropertiesPrefix("exit")
                     .withDefaultValue(true).read("Run again?")) break;
             terminal.resetToBookmark("MAIN");
         }

text-io/src/main/java/org/beryx/textio/InputReader.java

@@ -34,6 +34,8 @@
 public abstract class InputReader<T, B extends InputReader<T, B>> {
     private static final Logger logger =  LoggerFactory.getLogger(InputReader.class);
 
+    public static final String PROPS_PREFIX_ERROR_MESSAGE = "error";
+
     /** Functional interface for providing error messages */
     @FunctionalInterface
     public interface ErrorMessagesProvider {
@@ -418,7 +420,7 @@ public List<T> readList(List<String> prompt) {
                 }
                 if(!allErrors.isEmpty()) {
                     allErrors.add(0, getDefaultErrorMessage(null));
-                    textTerminal.println(allErrors);
+                    textTerminal.executeWithPropertiesPrefix(PROPS_PREFIX_ERROR_MESSAGE, t ->t.println(allErrors));
                     textTerminal.println();
                     continue;
                 }
@@ -470,18 +472,20 @@ private T getValueFromString(String sVal, TextTerminal<?> textTerminal) {
         if(errMessages == null) {
             Optional<T> value = getPossibleValue(result.getValue());
             if(value.isPresent()) return value.get();
-            textTerminal.print(getDefaultErrorMessage(sVal));
-            if(inlinePossibleValues) {
-                String options = possibleValues.stream()
-                        .map(val -> "'" + valueFormatter.apply(val) + "'")
-                        .collect(Collectors.joining(", "));
-                textTerminal.println(" Please enter one of: " + options + ".");
-            } else {
-                textTerminal.println(" Please enter one of the displayed values.");
-            }
-            textTerminal.println( );
+            textTerminal.executeWithPropertiesPrefix(PROPS_PREFIX_ERROR_MESSAGE, t -> {
+                t.print(getDefaultErrorMessage(sVal));
+                if(inlinePossibleValues) {
+                    String options = possibleValues.stream()
+                            .map(val -> "'" + valueFormatter.apply(val) + "'")
+                            .collect(Collectors.joining(", "));
+                    t.println(" Please enter one of: " + options + ".");
+                } else {
+                    t.println(" Please enter one of the displayed values.");
+                }
+            });
+            textTerminal.println();
         } else {
-            textTerminal.println(errMessages);
+            textTerminal.executeWithPropertiesPrefix(PROPS_PREFIX_ERROR_MESSAGE, t -> t.println(errMessages));
             textTerminal.println();
         }
         return null;
@@ -496,8 +500,10 @@ private T getValueFromIndex(String sVal, TextTerminal<?> textTerminal) {
         } catch (NumberFormatException e) {
             // Continue the execution. The next statement will print the error message.
         }
-        textTerminal.print(getDefaultErrorMessage(sVal));
-        textTerminal.println(" Enter a value between 1 and " + possibleValues.size() + ".");
+        textTerminal.executeWithPropertiesPrefix(PROPS_PREFIX_ERROR_MESSAGE, t -> {
+            textTerminal.print(getDefaultErrorMessage(sVal));
+            textTerminal.println(" Enter a value between 1 and " + possibleValues.size() + ".");
+        });
         textTerminal.println();
         return null;
     }

text-io/src/main/java/org/beryx/textio/TextTerminal.java

@@ -16,7 +16,8 @@
 package org.beryx.textio;
 
 import java.util.*;
-import java.util.function.*;
+import java.util.function.Consumer;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 
 import static org.beryx.textio.TerminalProperties.ExtendedChangeListener;
@@ -227,7 +228,12 @@ default void printf(Locale l, String format, Object... args) {
     default <R> R applyWithPropertiesConfigurator(Consumer<TerminalProperties<?>> propertiesConfigurator,
                                                   Function<TextTerminal<T>, R> action) {
         LinkedList<String[]> toRestore = new LinkedList<>();
-        ExtendedChangeListener listener = (term, key, oldVal, newVal) -> toRestore.add(new String[] {key, oldVal});
+        ExtendedChangeListener listener = (term, key, oldVal, newVal) -> {
+            boolean exists = toRestore.stream().filter(e -> e[0].equals(key)).findAny().isPresent();
+            if (!exists) {
+                toRestore.add(new String[]{key, oldVal});
+            }
+        };
         TerminalProperties<?> props = getProperties();
         if(propertiesConfigurator != null) {
             props.addListener(listener);
@@ -282,5 +288,4 @@ default void executeWithPropertiesPrefix(String prefix, Consumer<TextTerminal<T>
             });
         }, action);
     }
-
 }