From 2b67868513f9a6d7f7510d9bf50eb978e313ab68 Mon Sep 17 00:00:00 2001
From: Dennis Ushakov <dennis.ushakov@gmail.com>
Date: Tue, 20 Jan 2015 23:55:14 +0300
Subject: [PATCH] actions for Emmet edit point navigation (WEB-362)

---
 .../src/META-INF/XmlActions.xml               | 13 ++++
 .../emmet/actions/EmmetEditPointUtil.java     |  1 +
 .../emmet/actions/GoToEditPointAction.java    | 59 +++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 xml/impl/src/com/intellij/codeInsight/template/emmet/actions/GoToEditPointAction.java

diff --git a/platform/platform-resources/src/META-INF/XmlActions.xml b/platform/platform-resources/src/META-INF/XmlActions.xml
index 5b4e97e19fe2..afb8af84a266 100644
--- a/platform/platform-resources/src/META-INF/XmlActions.xml
+++ b/platform/platform-resources/src/META-INF/XmlActions.xml
@@ -97,6 +97,19 @@
               text="Update tag with Emmet" description="Update existing HTML tag with Emmet abbreviation">
         <add-to-group group-id="EditorLangPopupMenu" anchor="last"/>
       </action>
+
+      <group id="GoToEditPointGroup">
+        <separator/>
+        <add-to-group group-id="GoToMenu" anchor="after" relative-to-action="GoToErrorGroup"/>
+
+        <action id="EmmetNextEditPoint" class="com.intellij.codeInsight.template.emmet.actions.GoToEditPointAction$Forward"
+                text="Next Emmet Edit Point" description="Go to next Emmet edit point">
+        </action>
+
+        <action id="EmmetPreviousEditPoint" class="com.intellij.codeInsight.template.emmet.actions.GoToEditPointAction$Backward"
+                text="Previous Emmet Edit Point" description="Go to previous Emmet edit point">
+        </action>
+      </group>
     </group>
   </actions>
 </component>
diff --git a/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/EmmetEditPointUtil.java b/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/EmmetEditPointUtil.java
index 54da1a872fa5..24fd7faaeee1 100644
--- a/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/EmmetEditPointUtil.java
+++ b/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/EmmetEditPointUtil.java
@@ -87,6 +87,7 @@ public class EmmetEditPointUtil {
   }
 
   static boolean isApplicableFile(PsiFile file) {
+    if (file == null) return false;
     for (Language language : file.getViewProvider().getLanguages()) {
       if (language.isKindOf(XMLLanguage.INSTANCE)) return true;
     }
diff --git a/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/GoToEditPointAction.java b/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/GoToEditPointAction.java
new file mode 100644
index 000000000000..f6c66a88931f
--- /dev/null
+++ b/xml/impl/src/com/intellij/codeInsight/template/emmet/actions/GoToEditPointAction.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2000-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.codeInsight.template.emmet.actions;
+
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.CommonDataKeys;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.project.DumbAwareAction;
+import com.intellij.psi.PsiFile;
+import com.intellij.psi.impl.source.tree.injected.InjectedLanguageUtil;
+
+/**
+ * @author Dennis.Ushakov
+ */
+public abstract class GoToEditPointAction extends DumbAwareAction {
+  @Override
+  public void update(AnActionEvent e) {
+    final Editor editor = getEditor(e);
+    final PsiFile file = getFile(e);
+    final boolean isApplicable = editor != null && EmmetEditPointUtil.isApplicableFile(file);
+    e.getPresentation().setEnabledAndVisible(isApplicable);
+  }
+
+  private static PsiFile getFile(AnActionEvent e) {
+    return CommonDataKeys.PSI_FILE.getData(e.getDataContext());
+  }
+
+  private static Editor getEditor(AnActionEvent e) {
+    final Editor editor = CommonDataKeys.EDITOR.getData(e.getDataContext());
+    return editor != null ? InjectedLanguageUtil.getTopLevelEditor(editor) : null;
+  }
+
+  public static class Forward extends GoToEditPointAction {
+    @Override
+    public void actionPerformed(AnActionEvent e) {
+      EmmetEditPointUtil.moveForward(getEditor(e), getFile(e));
+    }
+  }
+
+  public static class Backward extends GoToEditPointAction {
+    @Override
+    public void actionPerformed(AnActionEvent e) {
+      EmmetEditPointUtil.moveBackward(getEditor(e), getFile(e));
+    }
+  }
+}