Control Indent Mapping Context

include/yaml.h

@@ -1493,7 +1493,6 @@ typedef enum yaml_emitter_state_e {
     YAML_EMIT_DOCUMENT_CONTENT_STATE,
     /** Expect DOCUMENT-END. */
     YAML_EMIT_DOCUMENT_END_STATE,
-
     /** Expect the first item of a flow sequence. */
     YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE,
     /** Expect an item of a flow sequence. */
@@ -1626,6 +1625,8 @@ typedef struct yaml_emitter_s {
     int canonical;
     /** The number of indentation spaces. */
     int best_indent;
+    /** Whether or not to indent block sequences in mapping context. */
+    int indent_mapping_sequence;
     /** The preferred width of the output lines. */
     int best_width;
     /** Allow unescaped non-ASCII characters? */
@@ -1874,6 +1875,16 @@ yaml_emitter_set_canonical(yaml_emitter_t *emitter, int canonical);
 YAML_DECLARE(void)
 yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent);
 
+/*
+ * Set whether or not to indent block sequences in mapping context.
+ *
+ * @param[in,out]   emitter                   An emitter object.
+ * @param[in]       indent_mapping_sequence   Boolean.
+ */
+
+YAML_DECLARE(void)
+yaml_emitter_set_indent_mapping_sequence(yaml_emitter_t *emitter, int indent_mapping_sequence);
+
 /**
  * Set the preferred line width. @c -1 means unlimited.
  *

src/api.c

@@ -540,6 +540,18 @@ yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent)
     emitter->best_indent = (1 < indent && indent < 10) ? indent : 2;
 }
 
+/*
+ * Set whether or not to indent block sequences in mapping context.
+ */
+
+YAML_DECLARE(void)
+yaml_emitter_set_indent_mapping_sequence(yaml_emitter_t *emitter, int indent_mapping_sequence)
+{
+    assert(emitter && "Non-NULL emitter object expected.");
+
+    emitter->indent_mapping_sequence = indent_mapping_sequence;
+}
+
 /*
  * Set the preferred line width.
  */

src/emitter.c

@@ -886,7 +886,9 @@ yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter,
     if (first)
     {
         if (!yaml_emitter_increase_indent(emitter, 0,
-                    (emitter->mapping_context && !emitter->indention)))
+                    (emitter->mapping_context
+                             && !emitter->indent_mapping_sequence
+                             && !emitter->indention)))
             return 0;
     }