Associate an file tpye to external Application

src/file/FileUtils.js

@@ -59,6 +59,11 @@ define(function (require, exports, module) {
      */
     var MAX_FILE_SIZE = MAX_FILE_SIZE_MB * 1024 * 1024;
 
+    /**
+     * @const {List} list of File Extensions which will be opened in external Application
+     */
+    var extListToBeOpenedInExtApp = [];
+
 
     /**
      * Asynchronously reads a file as UTF-8 encoded text.
@@ -526,6 +531,28 @@ define(function (require, exports, module) {
         return pathArray.join("/");
     }
 
+    /**
+     * @param {string} ext extension string a file
+     * @return {string} returns true If file to be opened in External Application.
+     *
+     */
+    function shouldOpenInExternalApplication(ext) {
+        return !extListToBeOpenedInExtApp.includes(ext);
+    }
+
+    /**
+     * @param {string} ext File Extensions to be added in External App List
+     *
+     */
+    function addExtensionToExternalAppList(ext) {
+
+        if(typeof ext !== 'string') {
+            extListToBeOpenedInExtApp.concat(ext);
+        } else {
+            extListToBeOpenedInExtApp.push(ext);
+        }
+    }
+
     // Asynchronously load DocumentCommandHandlers
     // This avoids a temporary circular dependency created
     // by relocating showFileOpenError() until deprecation is over
@@ -568,4 +595,6 @@ define(function (require, exports, module) {
     exports.comparePaths                   = comparePaths;
     exports.MAX_FILE_SIZE                  = MAX_FILE_SIZE;
     exports.encodeFilePath                 = encodeFilePath;
+    exports.shouldOpenInExternalApplication = shouldOpenInExternalApplication;
+    exports.addExtensionToExternalAppList = addExtensionToExternalAppList;
 });

src/nls/root/strings.js

@@ -903,5 +903,8 @@ define({
     "REMOTE_DEBUGGING_ENABLED"                       : "Remote debugging enabled on localhost:",
 
    // Remote debugging port argument is invalid
-    "REMOTE_DEBUGGING_PORT_INVALID"                  : "Cannot enable remote debugging on port {0}. Port numbers should be between {1} and {2}."
+    "REMOTE_DEBUGGING_PORT_INVALID"                  : "Cannot enable remote debugging on port {0}. Port numbers should be between {1} and {2}.",
+    
+    //Associate File Type to External App
+    "DESCRIPTION_EXTERNAL_EDITOR"                    : "Add File type association to external App here"
 });

src/project/FileTreeView.js

@@ -39,7 +39,8 @@ define(function (require, exports, module) {
         LanguageManager   = require("language/LanguageManager"),
         FileTreeViewModel = require("project/FileTreeViewModel"),
         ViewUtils         = require("utils/ViewUtils"),
-        KeyEvent          = require("utils/KeyEvent");
+        KeyEvent          = require("utils/KeyEvent"),
+        PreferencesManager  = require("preferences/PreferencesManager");
 
     var DOM = Preact.DOM;
 
@@ -554,7 +555,10 @@ define(function (require, exports, module) {
                     });
                 }
             } else {
-                this.props.actions.setSelected(this.myPath());
+                this.props.actions.setSelected(this.myPath(),
+                      FileUtils.shouldOpenInExternalApplication(
+                        FileUtils.getFileExtension(this.myPath()).toLowerCase()
+                      ));
             }
             e.stopPropagation();
             e.preventDefault();
@@ -569,6 +573,12 @@ define(function (require, exports, module) {
                 if (this.state.clickTimer !== null) {
                     this.clearTimer();
                 }
+                if (FileUtils.shouldOpenInExternalApplication(
+                        FileUtils.getFileExtension(this.myPath()).toLowerCase()
+                      )) {
+                    this.props.actions.openInExternalEditor(this.myPath());
+                    return;
+                }
                 this.props.actions.selectInWorkingSet(this.myPath());
             }
         },

src/project/FileViewController.js

@@ -226,6 +226,13 @@ define(function (require, exports, module) {
         return result.promise();
     }
 
+    /**
+     * Opens the specified document with its associated external editor,
+     */
+    function openInExternalEditor(fullPath) {
+        exports.trigger("openInExternalEditor", fullPath);
+    }
+
     /**
      * Opens the specified document if it's not already open, adds it to the working set,
      * and selects it in the WorkingSetView
@@ -275,4 +282,5 @@ define(function (require, exports, module) {
     exports.setFileViewFocus = setFileViewFocus;
     exports.WORKING_SET_VIEW = WORKING_SET_VIEW;
     exports.PROJECT_MANAGER = PROJECT_MANAGER;
+    exports.openInExternalEditor = openInExternalEditor;
 });

src/project/ProjectManager.js

@@ -280,6 +280,14 @@ define(function (require, exports, module) {
         this.model.selectInWorkingSet(path);
     };
 
+    /**
+     * See `FileViewController.openInExternalEditor`
+     */
+    ActionCreator.prototype.openInExternalEditor = function (path) {
+        FileViewController.openInExternalEditor(path);
+    };
+
+
     /**
      * See `ProjectModel.setContext`
      */