Add basic spacing rules for formatter

src/main/kotlin/dev/kdl/lang/formatter/KdlFormattingModelBuilder.kt

@@ -3,7 +3,7 @@ package dev.kdl.lang.formatter
 import com.intellij.formatting.*
 import com.intellij.psi.codeStyle.CodeStyleSettings
 import dev.kdl.lang.KdlLanguage
-import dev.kdl.lang.psi.ext.KdlElementTypes.IDENTIFIER
+import dev.kdl.lang.psi.ext.KdlElementTypes.*
 
 class KdlFormattingModelBuilder : FormattingModelBuilder {
  override fun createModel(formattingContext: FormattingContext): FormattingModel {
@@ -22,6 +22,10 @@ class KdlFormattingModelBuilder : FormattingModelBuilder {
 
  private fun createSpaceBuilder(settings: CodeStyleSettings): SpacingBuilder {
  return SpacingBuilder(settings, KdlLanguage)
- .after(IDENTIFIER).spaces(1)
+ .afterInside(IDENTIFIER, NODE_BLOCK).spaces(1)
+ .beforeInside(NODE_CHILDREN, NODE_BLOCK).spaces(1)
+ .betweenInside(TYPE, LITERAL, VALUE).none()
+ .withinPairInside(L_PAREN, R_PAREN, TYPE).none()
+ .aroundInside(EQ, PROP).none()
  }
 }

src/test/kotlin/dev/kdl/lang/formatter/KdlFormatterTest.kt

@@ -14,4 +14,9 @@ class KdlFormatterTest : FormatterTestCase() {
 
  fun test1() = doTest()
  fun test2() = doTest()
+ fun testAfterNodeName() = doTest()
+ fun testAroundPropEq() = doTest()
+ fun testBeforeChildrenBlock() = doTest()
+ fun testBetweenTypeAndLiteral() = doTest()
+ fun testInsideType() = doTest()
 }

src/test/testData/formatter/afterNodeName.kdl

@@ -0,0 +1,3 @@
+node {
+ node{}
+}

src/test/testData/formatter/afterNodeName_after.kdl

@@ -0,0 +1,3 @@
+node {
+ node {}
+}

src/test/testData/formatter/aroundPropEq.kdl

@@ -0,0 +1,3 @@
+node {
+ node prop = "val"
+}

src/test/testData/formatter/aroundPropEq_after.kdl

@@ -0,0 +1,3 @@
+node {
+ node prop="val"
+}

src/test/testData/formatter/beforeChildrenBlock.kdl

@@ -0,0 +1,3 @@
+node {
+ node "arg"{}
+}

src/test/testData/formatter/beforeChildrenBlock_after.kdl

@@ -0,0 +1,3 @@
+node {
+ node "arg" {}
+}

src/test/testData/formatter/betweenTypeAndLiteral.kdl

@@ -0,0 +1,3 @@
+node {
+ node (type) "arg"
+}

src/test/testData/formatter/betweenTypeAndLiteral_after.kdl

@@ -0,0 +1,3 @@
+node {
+ node (type)"arg"
+}

src/test/testData/formatter/insideType.kdl

@@ -0,0 +1,3 @@
+node {
+ node ( type )"arg"
+}

src/test/testData/formatter/insideType_after.kdl

@@ -0,0 +1,3 @@
+node {
+ node (type)"arg"
+}