#2 trim strings

stbf-demo/src/main/resources/flow.xml

@@ -68,7 +68,8 @@
             </keyboard>
         </screen>
         <screen id="20005" name="inline-test-2-screen">
-            <text>Inline Screen #2</text>
+            <text>Inline Screen #2
+                  ================</text>
             <keyboard>
                 <row>
                     <button actionRef="inline1-action"></button>

stbf-templates/src/main/java/ru/penkrat/stbf/templates/utils/StringUtils.java

@@ -2,9 +2,14 @@ package ru.penkrat.stbf.templates.utils;
 
 import lombok.experimental.UtilityClass;
 
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
 @UtilityClass
 public class StringUtils {
 
+    public static final String NL_DELIMITER = "\n";
+
     public boolean isEmpty(String string) {
         return string == null || string.isEmpty();
     }
@@ -12,4 +17,13 @@ public class StringUtils {
     public boolean isNotEmpty(String string) {
         return !isEmpty(string);
     }
+
+    public String ltrim(String text) {
+        if (text == null) {
+            return null;
+        }
+        return Stream.of(text.split(NL_DELIMITER))
+                .map(string -> string.trim())
+                .collect(Collectors.joining(NL_DELIMITER));
+    }
 }

stbf-templates/src/main/java/ru/penkrat/stbf/templates/xml/FlowScreenResolverDelegate.java

@@ -44,27 +44,35 @@ class FlowScreenResolverDelegate implements ScreenResolver {
     public Screen getScreen(String name) {
         ScreenItem item = resolver.get(name);
 
+        String text = item.getText();
+        if (!item.isPreserve()) {
+            text = StringUtils.ltrim(text);
+        }
         if (StringUtils.isNotEmpty(item.getMediaRef())) {
             final Media media = mediaResolver.getMedia(item.getMediaRef());
-            final MediaScreen mediaScreen = new MediaScreen(item.getText(), media, buildKeyboard(item.getKeyboard(), null));
+            final MediaScreen mediaScreen = new MediaScreen(text, media, buildKeyboard(item.getKeyboard(), null));
             return new RamFileIdStorageMediaScreen(mediaScreen);
         }
 
-        return new TextScreen(item.getText(), buildKeyboard(item.getKeyboard(), null));
+        return new TextScreen(text, buildKeyboard(item.getKeyboard(), null));
     }
 
     @Override
     public Screen getScreen(String name, Object context) {
         ScreenItem item = resolver.get(name);
 
+        String text = item.getText();
+        if (!item.isPreserve()) {
+            text = StringUtils.ltrim(text);
+        }
         if (StringUtils.isNotEmpty(item.getMediaRef())) {
             final Media media = mediaResolver.getMedia(item.getMediaRef());
-            final MediaScreen mediaScreen = new MediaScreen(templateRenderer.render(item.getText(), context), media,
+            final MediaScreen mediaScreen = new MediaScreen(templateRenderer.render(text, context), media,
                     resolveKeyboard(item.getKeyboard(), context));
             return new RamFileIdStorageMediaScreen(mediaScreen);
         }
 
-        return new TextScreen(templateRenderer.render(item.getText(), context),
+        return new TextScreen(templateRenderer.render(text, context),
                 resolveKeyboard(item.getKeyboard(), context));
     }
 

stbf-templates/src/main/java/ru/penkrat/stbf/templates/xml/ScreenItem.java

@@ -15,4 +15,7 @@ class ScreenItem extends NamedItem {
 
     private KeyboardWrapper keyboard = new KeyboardWrapper();
 
+    @JacksonXmlProperty(isAttribute = true)
+    private boolean preserve;
+
 }