chrome/browser/platform_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_PLATFORM_UTIL_H_
   6 #define CHROME_BROWSER_PLATFORM_UTIL_H_
   7
   8 #include <string>
   9
  10 #include "base/callback_forward.h"
  11 #include "base/strings/string16.h"
  12 #include "ui/gfx/native_widget_types.h"
  13
  14 class GURL;
  15 class Profile;
  16
  17 namespace base {
  18 class FilePath;
  19 }
  20
  21 namespace platform_util {
  22
  23 // Result of calling OpenFile() or OpenFolder() passed into OpenOperationResult.
  24 enum OpenOperationResult {
  25   OPEN_SUCCEEDED,
  26   OPEN_FAILED_PATH_NOT_FOUND,  // Specified path does not exist.
  27   OPEN_FAILED_INVALID_TYPE,  // Type of object found at path did not match what
  28                              // was expected. I.e. OpenFile was called on a
  29                              // folder or OpenFolder called on a file.
  30   OPEN_FAILED_NO_HANLDER_FOR_FILE_TYPE,  // There was no file handler capable of
  31                                          // opening file. Only returned on
  32                                          // ChromeOS.
  33   OPEN_FAILED_FILE_ERROR,  // Open operation failed due to some other file
  34                            // error.
  35 };
  36
  37 // Type of item that is the target of the OpenItem() call.
  38 enum OpenItemType { OPEN_FILE, OPEN_FOLDER };
  39
  40 // Callback used with OpenFile and OpenFolder.
  41 typedef base::Callback<void(OpenOperationResult)> OpenOperationCallback;
  42
  43 // Opens the item specified by |full_path|, which is expected to be the type
  44 // indicated by |item_type| in the desktop's default manner.
  45 // |callback| will be invoked on the UI thread with the result of the open
  46 // operation.
  47 //
  48 // It is an error if the object at |full_path| does not match the intended type
  49 // specified in |item_type|. This error will be reported to |callback|.
  50 //
  51 // Note: On all platforms, the user may be shown additional UI if there is no
  52 // suitable handler for |full_path|. On Chrome OS, all errors will result in
  53 // visible error messages iff |callback| is not specified.
  54 // Must be called on the UI thread.
  55 void OpenItem(Profile* profile,
  56               const base::FilePath& full_path,
  57               OpenItemType item_type,
  58               const OpenOperationCallback& callback);
  59
  60 // Opens the folder containing the item specified by |full_path| in the
  61 // desktop's default manner. If possible, the item will be selected. The
  62 // |profile| is used to determine the running profile of file manager app in
  63 // Chrome OS only. |profile| is not used in platforms other than Chrome OS. Must
  64 // be called on the UI thread.
  65 void ShowItemInFolder(Profile* profile, const base::FilePath& full_path);
  66
  67 // Open the given external protocol URL in the desktop's default manner.
  68 // (For example, mailto: URLs in the default mail user agent.)
  69 // Must be called from the UI thread.
  70 void OpenExternal(Profile* profile, const GURL& url);
  71
  72 // Get the top level window for the native view. This can return NULL.
  73 gfx::NativeWindow GetTopLevel(gfx::NativeView view);
  74
  75 // Returns a NativeView handle for parenting dialogs off |window|. This can be
  76 // used to position a dialog using a NativeWindow, when a NativeView (e.g.
  77 // browser tab) isn't available.
  78 gfx::NativeView GetViewForWindow(gfx::NativeWindow window);
  79
  80 // Get the direct parent of |view|, may return NULL.
  81 gfx::NativeView GetParent(gfx::NativeView view);
  82
  83 // Returns true if |window| is the foreground top level window.
  84 bool IsWindowActive(gfx::NativeWindow window);
  85
  86 // Activate the window, bringing it to the foreground top level.
  87 void ActivateWindow(gfx::NativeWindow window);
  88
  89 // Returns true if the view is visible. The exact definition of this is
  90 // platform-specific, but it is generally not "visible to the user", rather
  91 // whether the view has the visible attribute set.
  92 bool IsVisible(gfx::NativeView view);
  93
  94 #if defined(OS_MACOSX)
  95 // On 10.7+, back and forward swipe gestures can be triggered using a scroll
  96 // gesture, if enabled in System Preferences. This function returns true if
  97 // the feature is supported and enabled, and false otherwise.
  98 bool IsSwipeTrackingFromScrollEventsEnabled();
  99 #endif
 100
 101 }  // namespace platform_util
 102
 103 #endif  // CHROME_BROWSER_PLATFORM_UTIL_H_