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The following commit(s) were added to refs/heads/main by this push:
     new 2220b36180 Issue 8350 (#8351)
2220b36180 is described below

commit 2220b36180a8c33e12c7dbdcf21d4842c051b39b
Author: Matt Casters <[email protected]>
AuthorDate: Sun Sep 13 19:12:38 2026 +0200

    Issue 8350 (#8351)
    
    * issue #8350 - Fix for the AI advisor pane on Hop Web
    
    * issue #8350 - Fix for the AI advisor pane on Hop Web
---
 .../ai/ui/AiAdvisorDesktopTranscriptStyler.java    |  71 +++++++++++++
 .../org/apache/hop/ai/ui/AiAdvisorSessionPane.java |   5 +-
 .../apache/hop/ai/ui/AiAdvisorTranscriptPanel.java |  39 ++-----
 .../hop/ai/ui/AiAdvisorWebCompatibilityTest.java   | 113 +++++++++++++++++++++
 4 files changed, 199 insertions(+), 29 deletions(-)

diff --git 
a/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorDesktopTranscriptStyler.java
 
b/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorDesktopTranscriptStyler.java
new file mode 100644
index 0000000000..adff88cb1a
--- /dev/null
+++ 
b/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorDesktopTranscriptStyler.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hop.ai.ui;
+
+import org.apache.hop.ai.engine.AiAdvisorMarkdown;
+import org.apache.hop.ui.core.gui.GuiResource;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.StyleRange;
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+
+/**
+ * Desktop-only markdown transcript renderer using {@link StyledText} and 
{@link StyleRange}.
+ * Isolated into a separate class so {@link AiAdvisorTranscriptPanel} can be 
loaded in Hop Web
+ * (RAP/RWT) without triggering a {@link NoClassDefFoundError} on desktop-only 
SWT classes.
+ */
+class AiAdvisorDesktopTranscriptStyler {
+
+  private AiAdvisorDesktopTranscriptStyler() {}
+
+  static Control createAssistantBody(
+      Composite block, GridData gd, AiAdvisorTranscriptPanel.Role role, String 
text) {
+    StyledText body = new StyledText(block, SWT.MULTI | SWT.WRAP | 
SWT.READ_ONLY);
+    AiAdvisorMarkdown.Document document = AiAdvisorMarkdown.render(text);
+    body.setText(document.text());
+    body.setLayoutData(gd);
+    AiAdvisorTranscriptPanel.applyRoleLook(body, role);
+    applyMarkdownStyles(body, document);
+    return body;
+  }
+
+  private static void applyMarkdownStyles(StyledText widget, 
AiAdvisorMarkdown.Document document) {
+    GuiResource gui = GuiResource.getInstance();
+    for (AiAdvisorMarkdown.Span span : document.spans()) {
+      StyleRange range = new StyleRange();
+      range.start = span.start();
+      range.length = span.length();
+      switch (span.kind()) {
+        case HEADING -> range.font = gui.getFontMediumBold();
+        case BOLD -> range.fontStyle = SWT.BOLD;
+        case EMPHASIS -> range.fontStyle = SWT.ITALIC;
+        case CODE -> range.font = gui.getFontFixed();
+      }
+      widget.setStyleRange(range);
+    }
+  }
+
+  static int lineHeight(Control body) {
+    if (body instanceof StyledText styled) {
+      return styled.getLineHeight();
+    }
+    return 16;
+  }
+}
diff --git 
a/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorSessionPane.java 
b/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorSessionPane.java
index 920da97bda..e9bef66663 100644
--- 
a/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorSessionPane.java
+++ 
b/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorSessionPane.java
@@ -64,6 +64,7 @@ import org.apache.hop.ui.hopgui.file.IHopFileTypeHandler;
 import org.apache.hop.ui.hopgui.file.shared.HopGuiAbstractGraph;
 import org.apache.hop.ui.hopgui.perspective.TabItemHandler;
 import org.apache.hop.ui.hopgui.perspective.explorer.ExplorerPerspective;
+import org.apache.hop.ui.util.EnvironmentUtils;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.PaintEvent;
 import org.eclipse.swt.layout.FormAttachment;
@@ -134,7 +135,9 @@ public class AiAdvisorSessionPane extends Composite {
     wPrompt = new Text(this, SWT.MULTI | SWT.WRAP | SWT.BORDER | SWT.V_SCROLL);
     applyPromptFieldLook(wPrompt);
     wPrompt.setMessage(BaseMessages.getString(PKG, 
"AiAdvisor.Prompt.Message"));
-    wPrompt.addPaintListener(e -> paintPromptHint(wPrompt, e));
+    if (!EnvironmentUtils.getInstance().isWeb()) {
+      wPrompt.addPaintListener(e -> paintPromptHint(wPrompt, e));
+    }
     wPrompt.setLayoutData(
         new FormDataBuilder()
             .left(wQuestion, margin)
diff --git 
a/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorTranscriptPanel.java
 
b/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorTranscriptPanel.java
index 3403be2ad7..e63050f419 100644
--- 
a/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorTranscriptPanel.java
+++ 
b/plugins/tech/ai/src/main/java/org/apache/hop/ai/ui/AiAdvisorTranscriptPanel.java
@@ -27,10 +27,9 @@ import org.apache.hop.core.util.Utils;
 import org.apache.hop.i18n.BaseMessages;
 import org.apache.hop.ui.core.PropsUi;
 import org.apache.hop.ui.core.gui.GuiResource;
+import org.apache.hop.ui.util.EnvironmentUtils;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.ScrolledComposite;
-import org.eclipse.swt.custom.StyleRange;
-import org.eclipse.swt.custom.StyledText;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.graphics.FontData;
 import org.eclipse.swt.graphics.Point;
@@ -318,39 +317,23 @@ public class AiAdvisorTranscriptPanel extends Composite {
   private void appendBody(Composite block, Role role, String text) {
     GridData gd = new GridData(SWT.FILL, SWT.FILL, true, false);
     gd.widthHint = 1;
-    if (role == Role.USER) {
+    if (role == Role.USER || EnvironmentUtils.getInstance().isWeb()) {
       Text body = new Text(block, SWT.MULTI | SWT.WRAP | SWT.READ_ONLY);
-      body.setText(text != null ? text : "");
+      if (role == Role.USER) {
+        body.setText(text != null ? text : "");
+      } else {
+        AiAdvisorMarkdown.Document document = AiAdvisorMarkdown.render(text);
+        body.setText(document.text());
+      }
       body.setLayoutData(gd);
       applyRoleLook(body, role);
       bodies.add(body);
       return;
     }
-    StyledText body = new StyledText(block, SWT.MULTI | SWT.WRAP | 
SWT.READ_ONLY);
-    AiAdvisorMarkdown.Document document = AiAdvisorMarkdown.render(text);
-    body.setText(document.text());
-    body.setLayoutData(gd);
-    applyRoleLook(body, role);
-    applyMarkdownStyles(body, document);
+    Control body = AiAdvisorDesktopTranscriptStyler.createAssistantBody(block, 
gd, role, text);
     bodies.add(body);
   }
 
-  private void applyMarkdownStyles(StyledText widget, 
AiAdvisorMarkdown.Document document) {
-    GuiResource gui = GuiResource.getInstance();
-    for (AiAdvisorMarkdown.Span span : document.spans()) {
-      StyleRange range = new StyleRange();
-      range.start = span.start();
-      range.length = span.length();
-      switch (span.kind()) {
-        case HEADING -> range.font = gui.getFontMediumBold();
-        case BOLD -> range.fontStyle = SWT.BOLD;
-        case EMPHASIS -> range.fontStyle = SWT.ITALIC;
-        case CODE -> range.font = gui.getFontFixed();
-      }
-      widget.setStyleRange(range);
-    }
-  }
-
   /**
    * Subtle role colors so questions and answers are distinct in both light 
and dark mode. Values
    * are {background R,G,B, foreground R,G,B}.
@@ -455,8 +438,8 @@ public class AiAdvisorTranscriptPanel extends Composite {
     if (body instanceof Text text) {
       return text.getLineHeight();
     }
-    if (body instanceof StyledText styled) {
-      return styled.getLineHeight();
+    if (!EnvironmentUtils.getInstance().isWeb()) {
+      return AiAdvisorDesktopTranscriptStyler.lineHeight(body);
     }
     return 16;
   }
diff --git 
a/plugins/tech/ai/src/test/java/org/apache/hop/ai/ui/AiAdvisorWebCompatibilityTest.java
 
b/plugins/tech/ai/src/test/java/org/apache/hop/ai/ui/AiAdvisorWebCompatibilityTest.java
new file mode 100644
index 0000000000..37eaf6b389
--- /dev/null
+++ 
b/plugins/tech/ai/src/test/java/org/apache/hop/ai/ui/AiAdvisorWebCompatibilityTest.java
@@ -0,0 +1,113 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hop.ai.ui;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Hop Web runs on RAP/RWT, which ships an SWT subset. Classes loaded in Hop 
Web must not mention
+ * desktop-only SWT types in field or method signatures, as reflection or 
class linking will fail
+ * with {@link NoClassDefFoundError}.
+ */
+class AiAdvisorWebCompatibilityTest {
+
+  private static final Set<String> DESKTOP_ONLY_SWT_TYPES =
+      new HashSet<>(
+          Arrays.asList(
+              "org.eclipse.swt.custom.BidiSegmentListener",
+              "org.eclipse.swt.custom.Bullet",
+              "org.eclipse.swt.custom.CTabFolderRenderer",
+              "org.eclipse.swt.custom.CaretListener",
+              "org.eclipse.swt.custom.ExtendedModifyListener",
+              "org.eclipse.swt.custom.LineBackgroundListener",
+              "org.eclipse.swt.custom.LineStyleEvent",
+              "org.eclipse.swt.custom.LineStyleListener",
+              "org.eclipse.swt.custom.PaintObjectListener",
+              "org.eclipse.swt.custom.PopupList",
+              "org.eclipse.swt.custom.ST",
+              "org.eclipse.swt.custom.StyleRange",
+              "org.eclipse.swt.custom.StyledText",
+              "org.eclipse.swt.custom.StyledTextContent",
+              "org.eclipse.swt.custom.TableCursor",
+              "org.eclipse.swt.custom.TreeCursor",
+              "org.eclipse.swt.custom.VerifyKeyListener",
+              "org.eclipse.swt.graphics.GlyphMetrics",
+              "org.eclipse.swt.graphics.Pattern",
+              "org.eclipse.swt.graphics.Region",
+              "org.eclipse.swt.graphics.TextLayout",
+              "org.eclipse.swt.graphics.TextStyle",
+              "org.eclipse.swt.widgets.Caret",
+              "org.eclipse.swt.widgets.Tracker"));
+
+  private static final List<Class<?>> WEB_ELIGIBLE_UI_CLASSES =
+      List.of(
+          AiAdvisorPerspective.class,
+          AiAdvisorWorkbench.class,
+          AiAdvisorSessionPane.class,
+          AiAdvisorTranscriptPanel.class,
+          AiAdvisorViews.class,
+          AiAdvisorProposalReviewDialog.class,
+          AiAdvisorMetadataSelectionDialog.class,
+          AiAdvisorDialog.class,
+          PipelineAiGuiPlugin.class,
+          WorkflowAiGuiPlugin.class);
+
+  @Test
+  void uiClassesAvoidDesktopOnlySwtTypesInSignatures() {
+    List<String> violations = new ArrayList<>();
+
+    for (Class<?> clazz : WEB_ELIGIBLE_UI_CLASSES) {
+      for (Field field : clazz.getDeclaredFields()) {
+        if (DESKTOP_ONLY_SWT_TYPES.contains(field.getType().getName())) {
+          violations.add(
+              clazz.getName()
+                  + ": field "
+                  + field.getName()
+                  + " of type "
+                  + field.getType().getName());
+        }
+      }
+      for (Method method : clazz.getDeclaredMethods()) {
+        List<Class<?>> types = new ArrayList<>();
+        types.add(method.getReturnType());
+        types.addAll(Arrays.asList(method.getParameterTypes()));
+        for (Class<?> type : types) {
+          if (DESKTOP_ONLY_SWT_TYPES.contains(type.getName())) {
+            violations.add(
+                clazz.getName() + ": method " + method.getName() + " uses " + 
type.getName());
+          }
+        }
+      }
+    }
+
+    assertTrue(
+        violations.isEmpty(),
+        "UI classes eligible for Hop Web must not name desktop-only SWT types 
in field or method"
+            + " signatures: "
+            + violations);
+  }
+}

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