The Tor Browser / file comparison
comparison: accessible/src/windows/msaa/HyperTextAccessibleWrap.cpp
accessible/src/windows/msaa/HyperTextAccessibleWrap.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:cd0643c871e6 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:expandtab:shiftwidth=2:tabstop=2: | |
| 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 | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #include "HyperTextAccessibleWrap.h" | |
| 9 #include "Accessible-inl.h" | |
| 10 | |
| 11 #include "nsEventShell.h" | |
| 12 | |
| 13 #include "mozilla/StaticPtr.h" | |
| 14 | |
| 15 using namespace mozilla; | |
| 16 using namespace mozilla::a11y; | |
| 17 | |
| 18 StaticRefPtr<Accessible> HyperTextAccessibleWrap::sLastTextChangeAcc; | |
| 19 StaticAutoPtr<nsString> HyperTextAccessibleWrap::sLastTextChangeString; | |
| 20 uint32_t HyperTextAccessibleWrap::sLastTextChangeStart = 0; | |
| 21 uint32_t HyperTextAccessibleWrap::sLastTextChangeEnd = 0; | |
| 22 bool HyperTextAccessibleWrap::sLastTextChangeWasInsert = false; | |
| 23 | |
| 24 NS_IMPL_ISUPPORTS_INHERITED0(HyperTextAccessibleWrap, | |
| 25 HyperTextAccessible) | |
| 26 | |
| 27 STDMETHODIMP | |
| 28 HyperTextAccessibleWrap::QueryInterface(REFIID aIID, void** aInstancePtr) | |
| 29 { | |
| 30 if (!aInstancePtr) | |
| 31 return E_FAIL; | |
| 32 | |
| 33 *aInstancePtr = nullptr; | |
| 34 | |
| 35 if (IsTextRole()) { | |
| 36 if (aIID == IID_IAccessibleText) | |
| 37 *aInstancePtr = | |
| 38 static_cast<IAccessibleText*>(static_cast<ia2AccessibleText*>(this)); | |
| 39 else if (aIID == IID_IAccessibleHypertext) | |
| 40 *aInstancePtr = static_cast<IAccessibleHypertext*>(this); | |
| 41 else if (aIID == IID_IAccessibleEditableText) | |
| 42 *aInstancePtr = static_cast<IAccessibleEditableText*>(this); | |
| 43 | |
| 44 if (*aInstancePtr) { | |
| 45 AddRef(); | |
| 46 return S_OK; | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 return AccessibleWrap::QueryInterface(aIID, aInstancePtr); | |
| 51 } | |
| 52 | |
| 53 nsresult | |
| 54 HyperTextAccessibleWrap::HandleAccEvent(AccEvent* aEvent) | |
| 55 { | |
| 56 uint32_t eventType = aEvent->GetEventType(); | |
| 57 | |
| 58 if (eventType == nsIAccessibleEvent::EVENT_TEXT_REMOVED || | |
| 59 eventType == nsIAccessibleEvent::EVENT_TEXT_INSERTED) { | |
| 60 Accessible* accessible = aEvent->GetAccessible(); | |
| 61 if (accessible && accessible->IsHyperText()) { | |
| 62 sLastTextChangeAcc = accessible; | |
| 63 if (!sLastTextChangeString) | |
| 64 sLastTextChangeString = new nsString(); | |
| 65 | |
| 66 AccTextChangeEvent* event = downcast_accEvent(aEvent); | |
| 67 event->GetModifiedText(*sLastTextChangeString); | |
| 68 sLastTextChangeStart = event->GetStartOffset(); | |
| 69 sLastTextChangeEnd = sLastTextChangeStart + event->GetLength(); | |
| 70 sLastTextChangeWasInsert = event->IsTextInserted(); | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 return HyperTextAccessible::HandleAccEvent(aEvent); | |
| 75 } | |
| 76 | |
| 77 nsresult | |
| 78 HyperTextAccessibleWrap::GetModifiedText(bool aGetInsertedText, | |
| 79 nsAString& aText, | |
| 80 uint32_t* aStartOffset, | |
| 81 uint32_t* aEndOffset) | |
| 82 { | |
| 83 aText.Truncate(); | |
| 84 *aStartOffset = 0; | |
| 85 *aEndOffset = 0; | |
| 86 | |
| 87 if (!sLastTextChangeAcc) | |
| 88 return NS_OK; | |
| 89 | |
| 90 if (aGetInsertedText != sLastTextChangeWasInsert) | |
| 91 return NS_OK; | |
| 92 | |
| 93 if (sLastTextChangeAcc != this) | |
| 94 return NS_OK; | |
| 95 | |
| 96 *aStartOffset = sLastTextChangeStart; | |
| 97 *aEndOffset = sLastTextChangeEnd; | |
| 98 aText.Append(*sLastTextChangeString); | |
| 99 | |
| 100 return NS_OK; | |
| 101 } | |
| 102 |
