Add platform_util from Chrome.

The platform_util files just come from chrome/browser/ with slight
modifications so it doesn't depend on grit/generate_resources.h, which
is not availabe in libchromiumcontent because it's generated by chrome's
chrome/app/generated_resources.grd.

atom.gyp

@@ -60,6 +60,8 @@
       'common/node_bindings_mac.mm',
       'common/options_switches.cc',
       'common/options_switches.h',
+      'common/platform_util_mac.mm',
+      'common/platform_util.h',
       'common/v8_value_converter_impl.cc',
       'common/v8_value_converter_impl.h',
       'renderer/api/atom_api_renderer_ipc.cc',

common/platform_util.h

@@ -0,0 +1,30 @@
+// Copyright (c) 2013 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_COMMON_PLATFORM_UTIL_H_
+#define ATOM_COMMON_PLATFORM_UTIL_H_
+
+class GURL;
+
+namespace base {
+class FilePath;
+}
+
+namespace platform_util {
+
+// Show the given file in a file manager. If possible, select the file.
+// Must be called from the UI thread.
+void ShowItemInFolder(const base::FilePath& full_path);
+
+// Open the given file in the desktop's default manner.
+// Must be called from the UI thread.
+void OpenItem(const base::FilePath& full_path);
+
+// Open the given external protocol URL in the desktop's default manner.
+// (For example, mailto: URLs in the default mail user agent.)
+void OpenExternal(const GURL& url);
+
+}  // platform_util
+
+#endif  // ATOM_COMMON_PLATFORM_UTIL_H_

common/platform_util_mac.mm

@@ -0,0 +1,129 @@
+// Copyright (c) 2013 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "common/platform_util.h"
+
+#include <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/mac/mac_logging.h"
+#include "base/mac/scoped_aedesc.h"
+#include "base/strings/sys_string_conversions.h"
+#include "googleurl/src/gurl.h"
+
+namespace platform_util {
+
+void ShowItemInFolder(const base::FilePath& full_path) {
+  DCHECK([NSThread isMainThread]);
+  NSString* path_string = base::SysUTF8ToNSString(full_path.value());
+  if (!path_string || ![[NSWorkspace sharedWorkspace] selectFile:path_string
+                                        inFileViewerRootedAtPath:nil])
+    LOG(WARNING) << "NSWorkspace failed to select file " << full_path.value();
+}
+
+// This function opens a file.  This doesn't use LaunchServices or NSWorkspace
+// because of two bugs:
+//  1. Incorrect app activation with com.apple.quarantine:
+//     http://crbug.com/32921
+//  2. Silent no-op for unassociated file types: http://crbug.com/50263
+// Instead, an AppleEvent is constructed to tell the Finder to open the
+// document.
+void OpenItem(const base::FilePath& full_path) {
+  DCHECK([NSThread isMainThread]);
+  NSString* path_string = base::SysUTF8ToNSString(full_path.value());
+  if (!path_string)
+    return;
+
+  // Create the target of this AppleEvent, the Finder.
+  base::mac::ScopedAEDesc<AEAddressDesc> address;
+  const OSType finderCreatorCode = 'MACS';
+  OSErr status = AECreateDesc(typeApplSignature,  // type
+                              &finderCreatorCode,  // data
+                              sizeof(finderCreatorCode),  // dataSize
+                              address.OutPointer());  // result
+  if (status != noErr) {
+    OSSTATUS_LOG(WARNING, status) << "Could not create OpenItem() AE target";
+    return;
+  }
+
+  // Build the AppleEvent data structure that instructs Finder to open files.
+  base::mac::ScopedAEDesc<AppleEvent> theEvent;
+  status = AECreateAppleEvent(kCoreEventClass,  // theAEEventClass
+                              kAEOpenDocuments,  // theAEEventID
+                              address,  // target
+                              kAutoGenerateReturnID,  // returnID
+                              kAnyTransactionID,  // transactionID
+                              theEvent.OutPointer());  // result
+  if (status != noErr) {
+    OSSTATUS_LOG(WARNING, status) << "Could not create OpenItem() AE event";
+    return;
+  }
+
+  // Create the list of files (only ever one) to open.
+  base::mac::ScopedAEDesc<AEDescList> fileList;
+  status = AECreateList(NULL,  // factoringPtr
+                        0,  // factoredSize
+                        false,  // isRecord
+                        fileList.OutPointer());  // resultList
+  if (status != noErr) {
+    OSSTATUS_LOG(WARNING, status) << "Could not create OpenItem() AE file list";
+    return;
+  }
+
+  // Add the single path to the file list.  C-style cast to avoid both a
+  // static_cast and a const_cast to get across the toll-free bridge.
+  CFURLRef pathURLRef = (CFURLRef)[NSURL fileURLWithPath:path_string];
+  FSRef pathRef;
+  if (CFURLGetFSRef(pathURLRef, &pathRef)) {
+    status = AEPutPtr(fileList.OutPointer(),  // theAEDescList
+                      0,  // index
+                      typeFSRef,  // typeCode
+                      &pathRef,  // dataPtr
+                      sizeof(pathRef));  // dataSize
+    if (status != noErr) {
+      OSSTATUS_LOG(WARNING, status)
+          << "Could not add file path to AE list in OpenItem()";
+      return;
+    }
+  } else {
+    LOG(WARNING) << "Could not get FSRef for path URL in OpenItem()";
+    return;
+  }
+
+  // Attach the file list to the AppleEvent.
+  status = AEPutParamDesc(theEvent.OutPointer(),  // theAppleEvent
+                          keyDirectObject,  // theAEKeyword
+                          fileList);  // theAEDesc
+  if (status != noErr) {
+    OSSTATUS_LOG(WARNING, status)
+        << "Could not put the AE file list the path in OpenItem()";
+    return;
+  }
+
+  // Send the actual event.  Do not care about the reply.
+  base::mac::ScopedAEDesc<AppleEvent> reply;
+  status = AESend(theEvent,  // theAppleEvent
+                  reply.OutPointer(),  // reply
+                  kAENoReply + kAEAlwaysInteract,  // sendMode
+                  kAENormalPriority,  // sendPriority
+                  kAEDefaultTimeout,  // timeOutInTicks
+                  NULL, // idleProc
+                  NULL);  // filterProc
+  if (status != noErr) {
+    OSSTATUS_LOG(WARNING, status)
+        << "Could not send AE to Finder in OpenItem()";
+  }
+}
+
+void OpenExternal(const GURL& url) {
+  DCHECK([NSThread isMainThread]);
+  NSString* url_string = base::SysUTF8ToNSString(url.spec());
+  NSURL* ns_url = [NSURL URLWithString:url_string];
+  if (!ns_url || ![[NSWorkspace sharedWorkspace] openURL:ns_url])
+    LOG(WARNING) << "NSWorkspace failed to open URL " << url;
+}
+
+}  // namespace platform_util