If a text block is outdented, outdent the opening """ too

core/src/main/java/com/google/googlejavaformat/java/JavaInputAstVisitor.java

@@ -70,6 +70,7 @@
 import com.google.googlejavaformat.FormattingError;
 import com.google.googlejavaformat.Indent;
 import com.google.googlejavaformat.Input;
+import com.google.googlejavaformat.Newlines;
 import com.google.googlejavaformat.Op;
 import com.google.googlejavaformat.OpenOp;
 import com.google.googlejavaformat.OpsBuilder;
@@ -1667,6 +1668,15 @@ public Void visitMemberSelect(MemberSelectTree node, Void unused) {
   public Void visitLiteral(LiteralTree node, Void unused) {
     sync(node);
     String sourceForNode = getSourceForNode(node, getCurrentPath());
+    if (sourceForNode.endsWith("\"\"\"")
+        && (Newlines.hasNewlineAt(sourceForNode, sourceForNode.length() - 4) != -1)) {
+      // If the closing delimiter of a text block starts at the margin, outdent the opening
+      // delimiter as well by adding a break with negative indentation. Outdenting for text blocks
+      // with wide contents is also handled by StringWrapper, but this means the behaviour for
+      // the opening delimiter is consistent if string wrapping is disabled, and also effectively
+      // preserves user choice about which text blocks stay de-indented.
+      builder.breakOp(Indent.Const.make(Integer.MIN_VALUE / indentMultiplier, indentMultiplier));
+    }
     if (isUnaryMinusLiteral(sourceForNode)) {
       token("-");
       sourceForNode = sourceForNode.substring(1).trim();

core/src/main/java/com/google/googlejavaformat/java/StringWrapper.java

@@ -190,9 +190,10 @@ public Void visitLiteral(LiteralTree literalTree, Void aVoid) {
     private void indentTextBlocks(
         TreeRangeMap<Integer, String> replacements, List<Tree> textBlocks) {
       for (Tree tree : textBlocks) {
-        int startPosition = getStartPosition(tree);
+        int startPosition = lineMap.getStartPosition(lineMap.getLineNumber(getStartPosition(tree)));
         int endPosition = getEndPosition(unit, tree);
         String text = input.substring(startPosition, endPosition);
+        int startColumn = CharMatcher.whitespace().negate().indexIn(text) + 1;
 
         // Find the source code of the text block with incidental whitespace removed.
         // The first line of the text block is always """, and it does not affect incidental
@@ -203,13 +204,12 @@ private void indentTextBlocks(
         int deindent =
             initialLines.get(1).stripTrailing().length() - lines.get(0).stripTrailing().length();
 
-        int startColumn = lineMap.getColumnNumber(startPosition);
         String prefix =
             (deindent == 0 || lines.stream().anyMatch(x -> x.length() + startColumn > columnLimit))
                 ? ""
                 : " ".repeat(startColumn - 1);
 
-        StringBuilder output = new StringBuilder(TEXT_BLOCK_DELIMITER);
+        StringBuilder output = new StringBuilder(prefix).append(initialLines.get(0).stripLeading());
         for (int i = 0; i < lines.size(); i++) {
           String line = lines.get(i);
           String trimmed = line.stripLeading().stripTrailing();

core/src/test/java/com/google/googlejavaformat/java/StringWrapperTest.java

@@ -63,7 +63,7 @@ public void textBlock() throws Exception {
             "  private String myString;",
             "  private ReproBug() {",
             "    String str =",
-            "        \"\"\"",
+            "\"\"\"",
             "{\"sourceEndpoint\":\"ri.something.1-1.object-internal.1\",\"targetEndpoint"
                 + "\":\"ri.something.1-1.object-internal.2\",\"typeId\":\"typeId\"}\\",
             "\"\"\";",

core/src/test/resources/com/google/googlejavaformat/java/testdata/B377585941.output

@@ -2,7 +2,7 @@ class T {
   {
     f(
         /* foo */ """
-                  hello
-                  """);
+        hello
+        """);
   }
 }

core/src/test/resources/com/google/googlejavaformat/java/testdata/RSLs.input

@@ -50,5 +50,12 @@ ipsum
     hello %s
     """
         .formatted("world");
+            f(
+    /* foo= */ """
+        foo
+        """,
+        /* bar= */ """
+        bar
+        """);
   }
 }

core/src/test/resources/com/google/googlejavaformat/java/testdata/RSLs.output

@@ -42,13 +42,13 @@ class RSLs {
       ipsum
       """;
   String j =
-      """
+"""
 lorem
 one long incredibly unbroken sentence moving from topic to topic so that no one had a chance to interrupt
 ipsum
 """;
   String k =
-      """
+"""
 lorem
 ipsum
 """;
@@ -65,5 +65,12 @@ ipsum
     hello %s
     """
         .formatted("world");
+    f(
+        /* foo= */ """
+        foo
+        """,
+        /* bar= */ """
+        bar
+        """);
   }
 }