widget/WidgetUtils.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=8 et :
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   6  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #ifndef mozilla_WidgetUtils_h
   9 #define mozilla_WidgetUtils_h
  10
  11 #include "mozilla/AlreadyAddRefed.h"
  12 #include "mozilla/gfx/Matrix.h"
  13 #include "nsRect.h"
  14
  15 class nsIWidget;
  16 class nsPIDOMWindowOuter;
  17
  18 namespace mozilla {
  19
  20 // NB: these must match up with pseudo-enum in nsIScreen.idl.
  21 enum ScreenRotation {
  22   ROTATION_0 = 0,
  23   ROTATION_90,
  24   ROTATION_180,
  25   ROTATION_270,
  26
  27   ROTATION_COUNT
  28 };
  29
  30 gfx::Matrix ComputeTransformForRotation(const nsIntRect& aBounds,
  31                                         ScreenRotation aRotation);
  32
  33 gfx::Matrix ComputeTransformForUnRotation(const nsIntRect& aBounds,
  34                                           ScreenRotation aRotation);
  35
  36 nsIntRect RotateRect(nsIntRect aRect, const nsIntRect& aBounds,
  37                      ScreenRotation aRotation);
  38
  39 namespace widget {
  40
  41 class WidgetUtils {
  42  public:
  43   /**
  44    * Shutdown() is called when "xpcom-will-shutdown" is notified.  This is
  45    * useful when you need to observe the notification in XP level code under
  46    * widget.
  47    */
  48   static void Shutdown();
  49
  50   /**
  51    * Starting at the docshell item for the passed in DOM window this looks up
  52    * the docshell tree until it finds a docshell item that has a widget.
  53    */
  54   static already_AddRefed<nsIWidget> DOMWindowToWidget(
  55       nsPIDOMWindowOuter* aDOMWindow);
  56
  57   /**
  58    * Compute our keyCode value (NS_VK_*) from an ASCII character.
  59    */
  60   static uint32_t ComputeKeyCodeFromChar(uint32_t aCharCode);
  61
  62   /**
  63    * Get unshifted charCode and shifted charCode for aKeyCode if the keyboad
  64    * layout is a Latin keyboard layout.
  65    *
  66    * @param aKeyCode            Our keyCode (NS_VK_*).
  67    * @param aIsCapsLock         TRUE if CapsLock is Locked.  Otherwise, FALSE.
  68    *                            This is used only when aKeyCode is NS_VK_[0-9].
  69    * @param aUnshiftedCharCode  CharCode for aKeyCode without Shift key.
  70    *                            This may be zero if aKeyCode key doesn't input
  71    *                            a Latin character.
  72    *                            Note that must not be nullptr.
  73    * @param aShiftedCharCode    CharCode for aKeyCOde with Shift key.
  74    *                            This is always 0 when aKeyCode isn't
  75    *                            NS_VK_[A-Z].
  76    *                            Note that must not be nullptr.
  77    */
  78   static void GetLatinCharCodeForKeyCode(uint32_t aKeyCode, bool aIsCapsLock,
  79                                          uint32_t* aUnshiftedCharCode,
  80                                          uint32_t* aShiftedCharCode);
  81
  82   /**
  83    * Does device have touch support
  84    */
  85   static uint32_t IsTouchDeviceSupportPresent();
  86
  87   /**
  88    * Send bidi keyboard information to content process
  89    */
  90   static void SendBidiKeyboardInfoToContent();
  91
  92   /**
  93    * Get branchShortName from string bundle
  94    */
  95   static void GetBrandShortName(nsAString& aBrandName);
  96
  97   /* When packaged as a snap, strict confinement needs to be accounted for.
  98      See https://snapcraft.io/docs for details.
  99      Return the snap's instance name, or null when not running as a snap. */
 100   static const char* GetSnapInstanceName();
 101 };
 102
 103 }  // namespace widget
 104 }  // namespace mozilla
 105
 106 #endif  // mozilla_WidgetUtils_h