[mod-commands] Rely on document text, rather than PSI text when building the final command

For some reason, they might be different. Probably due to incorrect PSI at the beginning of the action. In any case, document should be the source of truth, as the ModCommand will be applied to the document, rather than PSI
Fixes IDEA-359782 try postfix completion generates trailing garbage


(cherry picked from commit 292399a28d347f9b4fa22730002299d5c5b68167)

IJ-CR-147269

GitOrigin-RevId: 2ccd437d3c51c0ded16be634650ed8dfc59770b4

java/java-tests/testData/codeInsight/template/postfix/templates/try/afterLambda.java

@@ -0,0 +1,12 @@
+class Hello {
+  public static void main(String[] args) {
+    new Thread(() -> {
+      int a = 1;
+
+      int b = 2;
+
+      int c = 3;
+    }).start();.try<caret>
+    int d = 4;
+  }
+}

java/java-tests/testData/codeInsight/template/postfix/templates/try/afterLambda_after.java

@@ -0,0 +1,16 @@
+class Hello {
+  public static void main(String[] args) {
+      try {
+          new Thread(() -> {
+            int a = 1;
+      
+            int b = 2;
+      
+            int c = 3;
+          }).start();<caret>
+      } catch (Exception e) {
+          throw new RuntimeException(e);
+      }
+      int d = 4;
+  }
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/template/postfix/templates/TryPostfixTemplateTest.java

@@ -59,4 +59,8 @@ public class TryPostfixTemplateTest extends PostfixTemplateTestCase {
   public void testConstructorStatement() {
     doTest();
   }
+
+  public void testAfterLambda() {
+    doTest();
+  }
 }

platform/analysis-api/src/com/intellij/modcommand/ModUpdateFileText.java

@@ -23,7 +23,7 @@ public record ModUpdateFileText(@NotNull VirtualFile file, @NotNull String oldTe
     for (int i = 0; i < updatedRanges.size(); i++) {
       Fragment prev = updatedRanges.get(i);
       if (prev.offset() + prev.newLength > newText.length()) {
-        throw new IllegalArgumentException("Range out of bounds: " + prev);
+        throw new IllegalArgumentException("Range out of bounds: " + prev + "; newText.length()=" + newText.length());
       }
       if (i < updatedRanges.size() - 1) {
         Fragment next = updatedRanges.get(i + 1);

platform/analysis-impl/src/com/intellij/lang/impl/modcommand/PsiUpdateImpl.java

@@ -143,7 +143,7 @@ final class PsiUpdateImpl {
       }
       myManager.commitDocument(myDocument);
       unblock();
-      String newText = myTargetFile.getText();
+      String newText = myTargetFile.getFileDocument().getText();
       return myOrigText.equals(newText) ? new ModNothing() :
              new ModUpdateFileText(origVirtualFile, myOrigText, newText, myFragments);
     }
@@ -303,7 +303,7 @@ final class PsiUpdateImpl {
         return tracker;
       });
     }
-    
+
     @Override
     public @NotNull PsiFile getOriginalFile(@NotNull PsiFile copyFile) throws IllegalArgumentException {
       Map.Entry<PsiFile, FileTracker> entry = ContainerUtil.find(myChangedFiles.entrySet(), e -> e.getValue().myCopyFile == copyFile);
@@ -644,7 +644,7 @@ final class PsiUpdateImpl {
 
     private @NotNull ModCommand getNavigateCommand() {
       if (!myPositionUpdated || myRenameSymbol != null) return nop();
-      int length = myTracker.myTargetFile.getTextLength();
+      int length = myTracker.myTargetFile.getFileDocument().getTextLength();
       int start = -1, end = -1, caret = -1;
       if (mySelection.getEndOffset() <= length) {
         start = mySelection.getStartOffset();