inline-parser, revert parsing index when processor returns null

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 #### Changed
 * `image-glide`: update to `4.11.0` version
+* `inline-parser`: revert parsing index when `InlineProcessor` returns `null` as result
 
 # 4.5.1
 

app-sample/src/main/java/io/noties/markwon/app/samples/inlineparsing/InlineParsingTooltipSample.java

@@ -26,6 +26,7 @@ import io.noties.markwon.Markwon;
 import io.noties.markwon.MarkwonVisitor;
 import io.noties.markwon.app.sample.Tags;
 import io.noties.markwon.app.sample.ui.MarkwonTextViewSample;
+import io.noties.markwon.image.ImagesPlugin;
 import io.noties.markwon.inlineparser.InlineProcessor;
 import io.noties.markwon.inlineparser.MarkwonInlineParserPlugin;
 import io.noties.markwon.sample.annotations.MarkwonArtifact;
@@ -56,7 +57,7 @@ public class InlineParsingTooltipSample extends MarkwonTextViewSample {
       "# Hello tooltip!\n\n" +
       "This is the !{tooltip label}(and actual content comes here)\n\n" +
       "what if it is !{here}(The contents can be blocks, limited though) instead?\n\n" +
-      "![image](#) anyway";
+      "![image](https://github.com/dcurtis/markdown-mark/raw/master/png/208x128-solid.png) anyway";
 
     final Markwon markwon = Markwon.builder(context)
       .usePlugin(MarkwonInlineParserPlugin.create(factoryBuilder ->
@@ -71,6 +72,7 @@ public class InlineParsingTooltipSample extends MarkwonTextViewSample {
           });
         }
       })
+      .usePlugin(ImagesPlugin.create())
       .build();
 
     markwon.setMarkdown(textView, md);

markwon-inline-parser/src/main/java/io/noties/markwon/inlineparser/BangInlineProcessor.java

@@ -29,10 +29,6 @@ public class BangInlineProcessor extends InlineProcessor {
 
             return node;
         } else {
-            // @since 4.5.0 return null in case no match (multiple inline
-            //  processors can define `!` as _special_ character, so let them handle it)
-            //  NB! do not forget to reset index
-            index = startIndex;
             return null;
         }
     }

markwon-inline-parser/src/main/java/io/noties/markwon/inlineparser/MarkwonInlineParser.java

@@ -266,11 +266,18 @@ public class MarkwonInlineParser implements InlineParser, MarkwonInlineParserCon
         final List<InlineProcessor> inlines = this.inlineProcessors.get(c);
 
         if (inlines != null) {
+            // @since $SNAPSHOT; index must not be advanced if inline-processor returned null
+            //  so, further processors can be called at the _same_ position (and thus char)
+            final int startIndex = index;
+
             for (InlineProcessor inline : inlines) {
                 node = inline.parse(this);
                 if (node != null) {
                     break;
                 }
+
+                // reset after each iteration (happens only when node is null)
+                index = startIndex;
             }
         } else {
             final DelimiterProcessor delimiterProcessor = delimiterProcessors.get(c);