widget/WidgetUtils.h
author Botond Ballo <botond@mozilla.com>
Thu, 25 Apr 2019 14:33:17 +0000
changeset 530341 4f70b98aa8705b6906b6bd2a3de66d374addb177
parent 505383 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1546139 - Restore the call to AdjustFixedOrStickyLayer() for layers fixed to the RCD-RSF. r=kats This call served two purposes: (1) scroll the fixed layer by the eVisual transform, and (2) adjust it by the fixed margins. The first purpose is now served by applying the eVisual transform to the async zoom container, but we still need the call for the second purpose. Differential Revision: https://phabricator.services.mozilla.com/D28735

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_WidgetUtils_h
#define mozilla_WidgetUtils_h

#include "mozilla/EventForwards.h"
#include "mozilla/gfx/Matrix.h"
#include "nsCOMPtr.h"
#include "nsIWidget.h"
#include "nsRect.h"

class nsPIDOMWindowOuter;

namespace mozilla {

// NB: these must match up with pseudo-enum in nsIScreen.idl.
enum ScreenRotation {
  ROTATION_0 = 0,
  ROTATION_90,
  ROTATION_180,
  ROTATION_270,

  ROTATION_COUNT
};

gfx::Matrix ComputeTransformForRotation(const nsIntRect& aBounds,
                                        ScreenRotation aRotation);

gfx::Matrix ComputeTransformForUnRotation(const nsIntRect& aBounds,
                                          ScreenRotation aRotation);

nsIntRect RotateRect(nsIntRect aRect, const nsIntRect& aBounds,
                     ScreenRotation aRotation);

namespace widget {

class WidgetUtils {
 public:
  /**
   * Shutdown() is called when "xpcom-will-shutdown" is notified.  This is
   * useful when you need to observe the notification in XP level code under
   * widget.
   */
  static void Shutdown();

  /**
   * Starting at the docshell item for the passed in DOM window this looks up
   * the docshell tree until it finds a docshell item that has a widget.
   */
  static already_AddRefed<nsIWidget> DOMWindowToWidget(
      nsPIDOMWindowOuter* aDOMWindow);

  /**
   * Compute our keyCode value (NS_VK_*) from an ASCII character.
   */
  static uint32_t ComputeKeyCodeFromChar(uint32_t aCharCode);

  /**
   * Get unshifted charCode and shifted charCode for aKeyCode if the keyboad
   * layout is a Latin keyboard layout.
   *
   * @param aKeyCode            Our keyCode (NS_VK_*).
   * @param aIsCapsLock         TRUE if CapsLock is Locked.  Otherwise, FALSE.
   *                            This is used only when aKeyCode is NS_VK_[0-9].
   * @param aUnshiftedCharCode  CharCode for aKeyCode without Shift key.
   *                            This may be zero if aKeyCode key doesn't input
   *                            a Latin character.
   *                            Note that must not be nullptr.
   * @param aShiftedCharCode    CharCode for aKeyCOde with Shift key.
   *                            This is always 0 when aKeyCode isn't
   *                            NS_VK_[A-Z].
   *                            Note that must not be nullptr.
   */
  static void GetLatinCharCodeForKeyCode(uint32_t aKeyCode, bool aIsCapsLock,
                                         uint32_t* aUnshiftedCharCode,
                                         uint32_t* aShiftedCharCode);

  /**
   * Does device have touch support
   */
  static uint32_t IsTouchDeviceSupportPresent();

  /**
   * Send bidi keyboard information to content process
   */
  static void SendBidiKeyboardInfoToContent();

  /**
   * Get branchShortName from string bundle
   */
  static void GetBrandShortName(nsAString& aBrandName);
};

}  // namespace widget
}  // namespace mozilla

#endif  // mozilla_WidgetUtils_h