mac: Add showHiddenFiles property for showOpenDialog

atom/browser/ui/file_dialog.h

@@ -23,10 +23,11 @@ typedef std::pair<std::string, std::vector<std::string> > Filter;
 typedef std::vector<Filter> Filters;
 
 enum FileDialogProperty {
-  FILE_DIALOG_OPEN_FILE        = 1 << 0,
-  FILE_DIALOG_OPEN_DIRECTORY   = 1 << 1,
-  FILE_DIALOG_MULTI_SELECTIONS = 1 << 2,
-  FILE_DIALOG_CREATE_DIRECTORY = 1 << 3,
+  FILE_DIALOG_OPEN_FILE         = 1 << 0,
+  FILE_DIALOG_OPEN_DIRECTORY    = 1 << 1,
+  FILE_DIALOG_MULTI_SELECTIONS  = 1 << 2,
+  FILE_DIALOG_CREATE_DIRECTORY  = 1 << 3,
+  FILE_DIALOG_SHOW_HIDDEN_FILES = 1 << 4,
 };
 
 typedef base::Callback<void(

atom/browser/ui/file_dialog_mac.mm

@@ -86,6 +86,8 @@ void SetupDialogForProperties(NSOpenPanel* dialog, int properties) {
     [dialog setCanCreateDirectories:YES];
   if (properties & FILE_DIALOG_MULTI_SELECTIONS)
     [dialog setAllowsMultipleSelection:YES];
+  if (properties & FILE_DIALOG_SHOW_HIDDEN_FILES)
+    [dialog setShowsHiddenFiles:YES];
 }
 
 // Run modal dialog with parent window and return user's choice.

lib/browser/api/dialog.js

@@ -6,11 +6,12 @@ const v8Util = process.atomBinding('v8_util')
 
 var includes = [].includes
 
-var fileDialogProperties = {
+const fileDialogProperties = {
   openFile: 1 << 0,
   openDirectory: 1 << 1,
   multiSelections: 1 << 2,
-  createDirectory: 1 << 3
+  createDirectory: 1 << 3,
+  showHiddenFiles: 1 << 4
 }
 
 var messageBoxTypes = ['none', 'info', 'warning', 'error', 'question']