fix handlebars read action error (#312)

Author: patricklx

src/main/kotlin/com/emberjs/gts/GtsSupport.kt

@@ -1116,7 +1116,10 @@ class RootBlockWrapper(val block: DataLanguageBlockWrapper, val policy: HtmlPoli
         val htmlFile = viewProvider.getPsi(HTMLLanguage.INSTANCE)
         val jsFile = viewProvider.getPsi(JavaScriptSupportLoader.TYPESCRIPT) ?: viewProvider.getPsi(JavaScriptSupportLoader.ECMA_SCRIPT_6)
         val project = this.node!!.psi.project
-        val document = PsiDocumentManager.getInstance(project).getDocument(htmlFile)!!
+        val document = PsiDocumentManager.getInstance(project).getDocument(htmlFile)
+        if (document === null) {
+            return null
+        }
         val INDENT_SIZE = this.policy.settings.getIndentSize(htmlFile.language.associatedFileType)
         val JS_INDENT_SIZE = this.policy.settings.getIndentSize(jsFile.language.associatedFileType)
         if (this.parent != null) {

src/main/kotlin/com/emberjs/hbs/linter/ember-template-lint/TemplateLintExternalAnnotator.kt

@@ -7,12 +7,14 @@ import com.emberjs.icons.EmberIcons
 import com.intellij.lang.annotation.AnnotationHolder
 import com.intellij.lang.javascript.linter.*
 import com.intellij.lang.javascript.psi.JSFile
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.text.StringUtil
 import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiFile
+import java.util.concurrent.Future
 
 class TemplateLintExternalAnnotator(onTheFly: Boolean = true) : JSLinterExternalAnnotator<TemplateLintState>(onTheFly) {
     companion object {
@@ -46,16 +48,20 @@ class TemplateLintExternalAnnotator(onTheFly: Boolean = true) : JSLinterExternal
 
     override fun annotate(input: JSLinterInput<TemplateLintState>): JSLinterAnnotationResult? {
         var res: JSLinterAnnotationResult? = null
-        try {
-            res = TemplateLintExternalRunner(this.isOnTheFly).highlight(input)
-        } catch (ex: Exception) {
-            res = null
-            println(ex)
-        }
+        var p = ApplicationManager.getApplication().executeOnPooledThread {
+            try {
+                res = TemplateLintExternalRunner(this.isOnTheFly).highlight(input)
+            } catch (ex: Exception) {
+                res = null
+                println(ex)
+            }
 
-        val errors: MutableList<JSLinterError> = mutableListOf()
-        errors.addAll(res?.errors ?: listOf())
-        return JSLinterAnnotationResult.createLinterResult(input, errors.toList(), null as VirtualFile?)
+            val errors: MutableList<JSLinterError> = mutableListOf()
+            errors.addAll(res?.errors ?: listOf())
+            res = JSLinterAnnotationResult.createLinterResult(input, errors.toList(), null as VirtualFile?)
+        }
+        p.get()
+        return res
     }
 
     override fun apply(file: PsiFile, annotationResult: JSLinterAnnotationResult?, holder: AnnotationHolder) {

src/main/kotlin/com/emberjs/hbs/linter/ember-template-lint/TemplateLintInspection.kt

@@ -8,6 +8,10 @@ class TemplateLintInspection : JSLinterInspection() {
         return TemplateLintExternalAnnotator.INSTANCE_FOR_BATCH_INSPECTION
     }
 
+    override fun getStaticDescription(): String {
+        return TemplateLintBundle.message("hbs.lint.inspection")
+    }
+
     override fun getSettingsPath(): List<String?> {
         return ContainerUtil.newArrayList(
                 OptionsBundle.message("configurable.group.language.settings.display.name", *arrayOfNulls(0)),