Fix #25. Add check for empty range list.

Author: undeadcat

src/main/kotlin/com/intellij/StyledComponents/StyledComponentsInjector.kt

@@ -38,6 +38,8 @@ class StyledComponentsInjector : MultiHostInjector {
         val acceptedPattern = places.find { (elementPattern) -> elementPattern.accepts(injectionHost) }
         if (acceptedPattern != null) {
             val stringPlaces = getInjectionPlaces(injectionHost)
+            if (stringPlaces.isEmpty())
+                return
             registrar.startInjecting(LESSLanguage.INSTANCE)
             stringPlaces.forEachIndexed { index, (prefix, range, suffix) ->
                 val thePrefix = if (index == 0) acceptedPattern.prefix + prefix.orEmpty() else prefix

src/test/InjectionTest.kt

@@ -8,6 +8,12 @@ import com.intellij.util.containers.ContainerUtil
 import org.junit.Assert
 
 class InjectionTest : LightCodeInsightFixtureTestCase() {
+    
+    fun testTemplateArgumentIsWholeRange() {
+        doTest("let css = css`\${someVariable}`")
+        doTest("let globalCss = injectGlobal`\${someVariable}`")
+    }
+
     fun testCss() {
         doTest("let css = css`\n" +
                 "  color:red;\n" +