The Tor Browser: accessible/src/windows/msaa/DocAccessibleWrap.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     7 #include "DocAccessibleWrap.h"

     9 #include "Compatibility.h"

    10 #include "nsWinUtils.h"

    11 #include "mozilla/dom/TabChild.h"

    12 #include "Role.h"

    13 #include "RootAccessible.h"

    14 #include "sdnDocAccessible.h"

    15 #include "Statistics.h"

    17 #include "nsIDocShell.h"

    18 #include "nsIInterfaceRequestorUtils.h"

    20 using namespace mozilla;

    21 using namespace mozilla::a11y;

    23 ////////////////////////////////////////////////////////////////////////////////

    24 // DocAccessibleWrap

    25 ////////////////////////////////////////////////////////////////////////////////

    27 DocAccessibleWrap::

    28   DocAccessibleWrap(nsIDocument* aDocument, nsIContent* aRootContent,

    29                     nsIPresShell* aPresShell) :

    30   DocAccessible(aDocument, aRootContent, aPresShell), mHWND(nullptr)

    31 {

    32 }

    34 DocAccessibleWrap::~DocAccessibleWrap()

    35 {

    36 }

    38 IMPL_IUNKNOWN_QUERY_HEAD(DocAccessibleWrap)

    39   if (aIID == IID_ISimpleDOMDocument) {

    40     statistics::ISimpleDOMUsed();

    41     *aInstancePtr = static_cast<ISimpleDOMDocument*>(new sdnDocAccessible(this));

    42     static_cast<IUnknown*>(*aInstancePtr)->AddRef();

    43     return S_OK;

    44   }

    45 IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(HyperTextAccessibleWrap)

    47 STDMETHODIMP

    48 DocAccessibleWrap::get_accValue(VARIANT aVarChild, BSTR __RPC_FAR* aValue)

    49 {

    50   A11Y_TRYBLOCK_BEGIN

    52   if (!aValue)

    53     return E_INVALIDARG;

    54   *aValue = nullptr;

    56   // For backwards-compat, we still support old MSAA hack to provide URL in accValue

    57   // Check for real value first

    58   HRESULT hr = AccessibleWrap::get_accValue(aVarChild, aValue);

    59   if (FAILED(hr) || *aValue || aVarChild.lVal != CHILDID_SELF)

    60     return hr;

    62   // If document is being used to create a widget, don't use the URL hack

    63   roles::Role role = Role();

    64   if (role != roles::DOCUMENT && role != roles::APPLICATION &&

    65       role != roles::DIALOG && role != roles::ALERT)

    66     return hr;

    68   nsAutoString URL;

    69   nsresult rv = GetURL(URL);

    70   if (URL.IsEmpty())

    71     return S_FALSE;

    73   *aValue = ::SysAllocStringLen(URL.get(), URL.Length());

    74   return *aValue ? S_OK : E_OUTOFMEMORY;

    76   A11Y_TRYBLOCK_END

    77 }

    79 ////////////////////////////////////////////////////////////////////////////////

    80 // Accessible

    82 void

    83 DocAccessibleWrap::Shutdown()

    84 {

    85   // Do window emulation specific shutdown if emulation was started.

    86   if (nsWinUtils::IsWindowEmulationStarted()) {

    87     // Destroy window created for root document.

    88     if (mDocFlags & eTabDocument) {

    89       nsWinUtils::sHWNDCache->Remove(mHWND);

    90       ::DestroyWindow(static_cast<HWND>(mHWND));

    91     }

    93     mHWND = nullptr;

    94   }

    96   DocAccessible::Shutdown();

    97 }

    99 ////////////////////////////////////////////////////////////////////////////////

   100 // DocAccessible public

   102 void*

   103 DocAccessibleWrap::GetNativeWindow() const

   104 {

   105   return mHWND ? mHWND : DocAccessible::GetNativeWindow();

   106 }

   108 ////////////////////////////////////////////////////////////////////////////////

   109 // DocAccessible protected

   111 void

   112 DocAccessibleWrap::DoInitialUpdate()

   113 {

   114   DocAccessible::DoInitialUpdate();

   116   if (nsWinUtils::IsWindowEmulationStarted()) {

   117     // Create window for tab document.

   118     if (mDocFlags & eTabDocument) {

   119       mozilla::dom::TabChild* tabChild =

   120         mozilla::dom::TabChild::GetFrom(mDocumentNode->GetShell());

   122       a11y::RootAccessible* rootDocument = RootAccessible();

   124       mozilla::WindowsHandle nativeData = 0;

   125       if (tabChild)

   126         tabChild->SendGetWidgetNativeData(&nativeData);

   127       else

   128         nativeData = reinterpret_cast<mozilla::WindowsHandle>(

   129           rootDocument->GetNativeWindow());

   131       bool isActive = true;

   132       int32_t x = CW_USEDEFAULT, y = CW_USEDEFAULT, width = 0, height = 0;

   133       if (Compatibility::IsDolphin()) {

   134         GetBounds(&x, &y, &width, &height);

   135         int32_t rootX = 0, rootY = 0, rootWidth = 0, rootHeight = 0;

   136         rootDocument->GetBounds(&rootX, &rootY, &rootWidth, &rootHeight);

   137         x = rootX - x;

   138         y -= rootY;

   140         nsCOMPtr<nsISupports> container = mDocumentNode->GetContainer();

   141         nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(container);

   142         docShell->GetIsActive(&isActive);

   143       }

   145       HWND parentWnd = reinterpret_cast<HWND>(nativeData);

   146       mHWND = nsWinUtils::CreateNativeWindow(kClassNameTabContent, parentWnd,

   147                                              x, y, width, height, isActive);

   149       nsWinUtils::sHWNDCache->Put(mHWND, this);

   151     } else {

   152       DocAccessible* parentDocument = ParentDocument();

   153       if (parentDocument)

   154         mHWND = parentDocument->GetNativeWindow();

   155     }

   156   }

   157 }

The Tor Browser / file revision