gecko-dev/widget/WidgetUtils.cpp

/* -*- 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/. */

#include "mozilla/WidgetUtils.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/Services.h"
#include "mozilla/Unused.h"
#include "nsContentUtils.h"
#include "nsIBidiKeyboard.h"
#include "nsIStringBundle.h"
#include "nsTArray.h"
#ifdef XP_WIN
#include "WinUtils.h"
#endif
#ifdef MOZ_WIDGET_GTK
#include "mozilla/WidgetUtilsGtk.h"
#endif

namespace mozilla {

gfx::Matrix
ComputeTransformForRotation(const nsIntRect& aBounds,
                              ScreenRotation aRotation)
{
    gfx::Matrix transform;
    static const gfx::Float floatPi = static_cast<gfx::Float>(M_PI);

    switch (aRotation) {
    case ROTATION_0:
        break;
    case ROTATION_90:
        transform.PreTranslate(aBounds.Width(), 0);
        transform.PreRotate(floatPi / 2);
        break;
    case ROTATION_180:
        transform.PreTranslate(aBounds.Width(), aBounds.Height());
        transform.PreRotate(floatPi);
        break;
    case ROTATION_270:
        transform.PreTranslate(0, aBounds.Height());
        transform.PreRotate(floatPi * 3 / 2);
        break;
    default:
        MOZ_CRASH("Unknown rotation");
    }
    return transform;
}

gfx::Matrix
ComputeTransformForUnRotation(const nsIntRect& aBounds,
                              ScreenRotation aRotation)
{
    gfx::Matrix transform;
    static const gfx::Float floatPi = static_cast<gfx::Float>(M_PI);

    switch (aRotation) {
    case ROTATION_0:
        break;
    case ROTATION_90:
        transform.PreTranslate(0, aBounds.Height());
        transform.PreRotate(floatPi * 3 / 2);
        break;
    case ROTATION_180:
        transform.PreTranslate(aBounds.Width(), aBounds.Height());
        transform.PreRotate(floatPi);
        break;
    case ROTATION_270:
        transform.PreTranslate(aBounds.Width(), 0);
        transform.PreRotate(floatPi / 2);
        break;
    default:
        MOZ_CRASH("Unknown rotation");
    }
    return transform;
}

nsIntRect RotateRect(nsIntRect aRect,
                     const nsIntRect& aBounds,
                     ScreenRotation aRotation)
{
  switch (aRotation) {
    case ROTATION_0:
      return aRect;
    case ROTATION_90:
      return nsIntRect(aRect.Y(),
                       aBounds.Width() - aRect.XMost(),
                       aRect.Height(), aRect.Width());
    case ROTATION_180:
      return nsIntRect(aBounds.Width() - aRect.XMost(),
                       aBounds.Height() - aRect.YMost(),
                       aRect.Width(), aRect.Height());
    case ROTATION_270:
      return nsIntRect(aBounds.Height() - aRect.YMost(),
                       aRect.X(),
                       aRect.Height(), aRect.Width());
    default:
      MOZ_CRASH("Unknown rotation");
  }
}

namespace widget {

uint32_t
WidgetUtils::IsTouchDeviceSupportPresent()
{
#ifdef XP_WIN
  return WinUtils::IsTouchDeviceSupportPresent();
#elif defined(MOZ_WIDGET_GTK)
  return WidgetUtilsGTK::IsTouchDeviceSupportPresent();
#else
  return 0;
#endif
}

// static
void
WidgetUtils::SendBidiKeyboardInfoToContent()
{
  nsCOMPtr<nsIBidiKeyboard> bidiKeyboard = nsContentUtils::GetBidiKeyboard();
  if (!bidiKeyboard) {
    return;
  }

  bool rtl;
  if (NS_FAILED(bidiKeyboard->IsLangRTL(&rtl))) {
    return;
  }
  bool bidiKeyboards = false;
  bidiKeyboard->GetHaveBidiKeyboards(&bidiKeyboards);

  nsTArray<dom::ContentParent*> children;
  dom::ContentParent::GetAll(children);
  for (uint32_t i = 0; i < children.Length(); i++) {
    Unused << children[i]->SendBidiKeyboardNotify(rtl, bidiKeyboards);
  }
}

// static
void
WidgetUtils::GetBrandShortName(nsAString& aBrandName)
{
    aBrandName.Truncate();

    nsCOMPtr<nsIStringBundleService> bundleService =
        mozilla::services::GetStringBundleService();

    nsCOMPtr<nsIStringBundle> bundle;
    if (bundleService) {
        bundleService->CreateBundle(
            "chrome://branding/locale/brand.properties",
            getter_AddRefs(bundle));
    }

    if (bundle) {
        bundle->GetStringFromName("brandShortName", aBrandName);
    }
}

} // namespace widget
} // namespace mozilla