michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:expandtab:shiftwidth=2:tabstop=2:
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "HyperTextAccessibleWrap.h"
michael@0: #include "Accessible-inl.h"
michael@0: 
michael@0: #include "nsEventShell.h"
michael@0: 
michael@0: #include "mozilla/StaticPtr.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::a11y;
michael@0: 
michael@0: StaticRefPtr<Accessible> HyperTextAccessibleWrap::sLastTextChangeAcc;
michael@0: StaticAutoPtr<nsString> HyperTextAccessibleWrap::sLastTextChangeString;
michael@0: uint32_t HyperTextAccessibleWrap::sLastTextChangeStart = 0;
michael@0: uint32_t HyperTextAccessibleWrap::sLastTextChangeEnd = 0;
michael@0: bool HyperTextAccessibleWrap::sLastTextChangeWasInsert = false;
michael@0: 
michael@0: NS_IMPL_ISUPPORTS_INHERITED0(HyperTextAccessibleWrap,
michael@0:                              HyperTextAccessible)
michael@0: 
michael@0: STDMETHODIMP
michael@0: HyperTextAccessibleWrap::QueryInterface(REFIID aIID, void** aInstancePtr)
michael@0: {
michael@0:   if (!aInstancePtr)
michael@0:     return E_FAIL;
michael@0: 
michael@0:   *aInstancePtr = nullptr;
michael@0: 
michael@0:   if (IsTextRole()) {
michael@0:     if (aIID == IID_IAccessibleText)
michael@0:       *aInstancePtr =
michael@0:         static_cast<IAccessibleText*>(static_cast<ia2AccessibleText*>(this));
michael@0:     else if (aIID == IID_IAccessibleHypertext)
michael@0:       *aInstancePtr = static_cast<IAccessibleHypertext*>(this);
michael@0:     else if (aIID == IID_IAccessibleEditableText)
michael@0:       *aInstancePtr = static_cast<IAccessibleEditableText*>(this);
michael@0: 
michael@0:     if (*aInstancePtr) {
michael@0:       AddRef();
michael@0:       return S_OK;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return AccessibleWrap::QueryInterface(aIID, aInstancePtr);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: HyperTextAccessibleWrap::HandleAccEvent(AccEvent* aEvent)
michael@0: {
michael@0:   uint32_t eventType = aEvent->GetEventType();
michael@0: 
michael@0:   if (eventType == nsIAccessibleEvent::EVENT_TEXT_REMOVED ||
michael@0:       eventType == nsIAccessibleEvent::EVENT_TEXT_INSERTED) {
michael@0:     Accessible* accessible = aEvent->GetAccessible();
michael@0:     if (accessible && accessible->IsHyperText()) {
michael@0:       sLastTextChangeAcc = accessible;
michael@0:       if (!sLastTextChangeString)
michael@0:         sLastTextChangeString = new nsString();
michael@0: 
michael@0:       AccTextChangeEvent* event = downcast_accEvent(aEvent);
michael@0:       event->GetModifiedText(*sLastTextChangeString);
michael@0:       sLastTextChangeStart = event->GetStartOffset();
michael@0:       sLastTextChangeEnd = sLastTextChangeStart + event->GetLength();
michael@0:       sLastTextChangeWasInsert = event->IsTextInserted();
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return HyperTextAccessible::HandleAccEvent(aEvent);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: HyperTextAccessibleWrap::GetModifiedText(bool aGetInsertedText,
michael@0:                                          nsAString& aText,
michael@0:                                          uint32_t* aStartOffset,
michael@0:                                          uint32_t* aEndOffset)
michael@0: {
michael@0:   aText.Truncate();
michael@0:   *aStartOffset = 0;
michael@0:   *aEndOffset = 0;
michael@0: 
michael@0:   if (!sLastTextChangeAcc)
michael@0:     return NS_OK;
michael@0: 
michael@0:   if (aGetInsertedText != sLastTextChangeWasInsert)
michael@0:     return NS_OK;
michael@0: 
michael@0:   if (sLastTextChangeAcc != this)
michael@0:     return NS_OK;
michael@0: 
michael@0:   *aStartOffset = sLastTextChangeStart;
michael@0:   *aEndOffset = sLastTextChangeEnd;
michael@0:   aText.Append(*sLastTextChangeString);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: