widget/WidgetUtils.cpp

   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 #include "mozilla/WidgetUtils.h"
   9 #include "mozilla/dom/ContentParent.h"
  10 #include "mozilla/Components.h"
  11 #include "mozilla/Unused.h"
  12 #include "nsContentUtils.h"
  13 #include "nsIBidiKeyboard.h"
  14 #include "nsIStringBundle.h"
  15 #include "nsTArray.h"
  16 #include "prenv.h"
  17
  18 namespace mozilla {
  19
  20 gfx::Matrix ComputeTransformForRotation(const nsIntRect& aBounds,
  21                                         ScreenRotation aRotation) {
  22   gfx::Matrix transform;
  23   static const gfx::Float floatPi = static_cast<gfx::Float>(M_PI);
  24
  25   switch (aRotation) {
  26     case ROTATION_0:
  27       break;
  28     case ROTATION_90:
  29       transform.PreTranslate(aBounds.Width(), 0);
  30       transform.PreRotate(floatPi / 2);
  31       break;
  32     case ROTATION_180:
  33       transform.PreTranslate(aBounds.Width(), aBounds.Height());
  34       transform.PreRotate(floatPi);
  35       break;
  36     case ROTATION_270:
  37       transform.PreTranslate(0, aBounds.Height());
  38       transform.PreRotate(floatPi * 3 / 2);
  39       break;
  40     default:
  41       MOZ_CRASH("Unknown rotation");
  42   }
  43   return transform;
  44 }
  45
  46 gfx::Matrix ComputeTransformForUnRotation(const nsIntRect& aBounds,
  47                                           ScreenRotation aRotation) {
  48   gfx::Matrix transform;
  49   static const gfx::Float floatPi = static_cast<gfx::Float>(M_PI);
  50
  51   switch (aRotation) {
  52     case ROTATION_0:
  53       break;
  54     case ROTATION_90:
  55       transform.PreTranslate(0, aBounds.Height());
  56       transform.PreRotate(floatPi * 3 / 2);
  57       break;
  58     case ROTATION_180:
  59       transform.PreTranslate(aBounds.Width(), aBounds.Height());
  60       transform.PreRotate(floatPi);
  61       break;
  62     case ROTATION_270:
  63       transform.PreTranslate(aBounds.Width(), 0);
  64       transform.PreRotate(floatPi / 2);
  65       break;
  66     default:
  67       MOZ_CRASH("Unknown rotation");
  68   }
  69   return transform;
  70 }
  71
  72 nsIntRect RotateRect(nsIntRect aRect, const nsIntRect& aBounds,
  73                      ScreenRotation aRotation) {
  74   switch (aRotation) {
  75     case ROTATION_0:
  76       return aRect;
  77     case ROTATION_90:
  78       return nsIntRect(aRect.Y(), aBounds.Width() - aRect.XMost(),
  79                        aRect.Height(), aRect.Width());
  80     case ROTATION_180:
  81       return nsIntRect(aBounds.Width() - aRect.XMost(),
  82                        aBounds.Height() - aRect.YMost(), aRect.Width(),
  83                        aRect.Height());
  84     case ROTATION_270:
  85       return nsIntRect(aBounds.Height() - aRect.YMost(), aRect.X(),
  86                        aRect.Height(), aRect.Width());
  87     default:
  88       MOZ_CRASH("Unknown rotation");
  89   }
  90 }
  91
  92 namespace widget {
  93
  94 // static
  95 void WidgetUtils::SendBidiKeyboardInfoToContent() {
  96   nsCOMPtr<nsIBidiKeyboard> bidiKeyboard = nsContentUtils::GetBidiKeyboard();
  97   if (!bidiKeyboard) {
  98     return;
  99   }
 100
 101   bool rtl;
 102   if (NS_FAILED(bidiKeyboard->IsLangRTL(&rtl))) {
 103     return;
 104   }
 105   bool bidiKeyboards = false;
 106   bidiKeyboard->GetHaveBidiKeyboards(&bidiKeyboards);
 107
 108   nsTArray<dom::ContentParent*> children;
 109   dom::ContentParent::GetAll(children);
 110   for (uint32_t i = 0; i < children.Length(); i++) {
 111     Unused << children[i]->SendBidiKeyboardNotify(rtl, bidiKeyboards);
 112   }
 113 }
 114
 115 // static
 116 void WidgetUtils::GetBrandShortName(nsAString& aBrandName) {
 117   aBrandName.Truncate();
 118
 119   nsCOMPtr<nsIStringBundleService> bundleService =
 120       mozilla::components::StringBundle::Service();
 121
 122   nsCOMPtr<nsIStringBundle> bundle;
 123   if (bundleService) {
 124     bundleService->CreateBundle("chrome://branding/locale/brand.properties",
 125                                 getter_AddRefs(bundle));
 126   }
 127
 128   if (bundle) {
 129     bundle->GetStringFromName("brandShortName", aBrandName);
 130   }
 131 }
 132
 133 }  // namespace widget
 134 }  // namespace mozilla