accessible/windows/msaa/DocAccessibleWrap.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "DocAccessibleWrap.h"
   8
   9 #include "Compatibility.h"
  10 #include "mozilla/PresShell.h"
  11 #include "mozilla/dom/Document.h"
  12 #include "DocAccessibleChild.h"
  13 #include "nsWinUtils.h"
  14 #include "RootAccessible.h"
  15 #include "sdnDocAccessible.h"
  16 #include "Statistics.h"
  17
  18 using namespace mozilla;
  19 using namespace mozilla::a11y;
  20
  21 ////////////////////////////////////////////////////////////////////////////////
  22 // DocAccessibleWrap
  23 ////////////////////////////////////////////////////////////////////////////////
  24
  25 DocAccessibleWrap::DocAccessibleWrap(dom::Document* aDocument,
  26                                      PresShell* aPresShell)
  27     : DocAccessible(aDocument, aPresShell), mHWND(nullptr) {}
  28
  29 DocAccessibleWrap::~DocAccessibleWrap() {}
  30
  31 ////////////////////////////////////////////////////////////////////////////////
  32 // LocalAccessible
  33
  34 void DocAccessibleWrap::Shutdown() {
  35   // Do window emulation specific shutdown if emulation was started.
  36   if (nsWinUtils::IsWindowEmulationStarted()) {
  37     // Destroy window created for root document.
  38     if (mDocFlags & eTopLevelContentDocInProcess) {
  39       MOZ_ASSERT(XRE_IsParentProcess());
  40       HWND hWnd = static_cast<HWND>(mHWND);
  41       ::RemovePropW(hWnd, kPropNameDocAcc);
  42       ::DestroyWindow(hWnd);
  43     }
  44
  45     mHWND = nullptr;
  46   }
  47
  48   DocAccessible::Shutdown();
  49 }
  50
  51 ////////////////////////////////////////////////////////////////////////////////
  52 // DocAccessible public
  53
  54 void* DocAccessibleWrap::GetNativeWindow() const {
  55   if (XRE_IsContentProcess()) {
  56     DocAccessibleChild* ipcDoc = IPCDoc();
  57     if (!ipcDoc) {
  58       return nullptr;
  59     }
  60
  61     return ipcDoc->GetNativeWindowHandle();
  62   } else if (mHWND) {
  63     return mHWND;
  64   }
  65   return DocAccessible::GetNativeWindow();
  66 }
  67
  68 ////////////////////////////////////////////////////////////////////////////////
  69 // DocAccessible protected
  70
  71 void DocAccessibleWrap::DoInitialUpdate() {
  72   DocAccessible::DoInitialUpdate();
  73
  74   if (nsWinUtils::IsWindowEmulationStarted()) {
  75     // Create window for tab document.
  76     if (mDocFlags & eTopLevelContentDocInProcess) {
  77       MOZ_ASSERT(XRE_IsParentProcess());
  78       a11y::RootAccessible* rootDocument = RootAccessible();
  79       bool isActive = true;
  80       LayoutDeviceIntRect rect(CW_USEDEFAULT, CW_USEDEFAULT, 0, 0);
  81       if (Compatibility::IsDolphin()) {
  82         rect = Bounds();
  83         LayoutDeviceIntRect rootRect = rootDocument->Bounds();
  84         rect.MoveToX(rootRect.X() - rect.X());
  85         rect.MoveByY(-rootRect.Y());
  86
  87         auto* bc = mDocumentNode->GetBrowsingContext();
  88         isActive = bc && bc->IsActive();
  89       }
  90
  91       RefPtr<DocAccessibleWrap> self(this);
  92       nsWinUtils::NativeWindowCreateProc onCreate([self](HWND aHwnd) -> void {
  93         ::SetPropW(aHwnd, kPropNameDocAcc,
  94                    reinterpret_cast<HANDLE>(self.get()));
  95       });
  96
  97       HWND parentWnd = reinterpret_cast<HWND>(rootDocument->GetNativeWindow());
  98       mHWND = nsWinUtils::CreateNativeWindow(
  99           kClassNameTabContent, parentWnd, rect.X(), rect.Y(), rect.Width(),
 100           rect.Height(), isActive, &onCreate);
 101     } else {
 102       DocAccessible* parentDocument = ParentDocument();
 103       if (parentDocument) mHWND = parentDocument->GetNativeWindow();
 104     }
 105   }
 106 }