actions for Emmet edit point navigation (WEB-362)

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>

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;
     }

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));
+    }
+  }
+}