1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/windows/sdn/sdnAccessible.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,535 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "sdnAccessible-inl.h"
1.11 +#include "ISimpleDOMNode_i.c"
1.12 +
1.13 +#include "DocAccessibleWrap.h"
1.14 +
1.15 +#include "nsAttrName.h"
1.16 +#include "nsCoreUtils.h"
1.17 +#include "nsIAccessibleTypes.h"
1.18 +#include "nsIDOMHTMLElement.h"
1.19 +#include "nsIDOMCSSStyleDeclaration.h"
1.20 +#include "nsNameSpaceManager.h"
1.21 +#include "nsServiceManagerUtils.h"
1.22 +#include "nsWinUtils.h"
1.23 +
1.24 +#include "nsAutoPtr.h"
1.25 +
1.26 +#include "mozilla/dom/Element.h"
1.27 +
1.28 +using namespace mozilla;
1.29 +using namespace mozilla::a11y;
1.30 +
1.31 +STDMETHODIMP
1.32 +sdnAccessible::QueryInterface(REFIID aREFIID, void** aInstancePtr)
1.33 +{
1.34 + A11Y_TRYBLOCK_BEGIN
1.35 +
1.36 + if (!aInstancePtr)
1.37 + return E_FAIL;
1.38 + *aInstancePtr = nullptr;
1.39 +
1.40 + if (aREFIID == IID_ISimpleDOMNode) {
1.41 + *aInstancePtr = static_cast<ISimpleDOMNode*>(this);
1.42 + AddRef();
1.43 + return S_OK;
1.44 + }
1.45 +
1.46 + AccessibleWrap* accessible = static_cast<AccessibleWrap*>(GetAccessible());
1.47 + if (accessible)
1.48 + return accessible->QueryInterface(aREFIID, aInstancePtr);
1.49 +
1.50 + // IUnknown* is the canonical one if and only if this accessible doesn't have
1.51 + // an accessible.
1.52 + if (aREFIID == IID_IUnknown) {
1.53 + *aInstancePtr = static_cast<ISimpleDOMNode*>(this);
1.54 + AddRef();
1.55 + return S_OK;
1.56 + }
1.57 +
1.58 + return E_NOINTERFACE;
1.59 +
1.60 + A11Y_TRYBLOCK_END
1.61 +}
1.62 +
1.63 +STDMETHODIMP
1.64 +sdnAccessible::get_nodeInfo(BSTR __RPC_FAR* aNodeName,
1.65 + short __RPC_FAR* aNameSpaceID,
1.66 + BSTR __RPC_FAR* aNodeValue,
1.67 + unsigned int __RPC_FAR* aNumChildren,
1.68 + unsigned int __RPC_FAR* aUniqueID,
1.69 + unsigned short __RPC_FAR* aNodeType)
1.70 +{
1.71 + A11Y_TRYBLOCK_BEGIN
1.72 +
1.73 + if (!aNodeName || !aNameSpaceID || !aNodeValue || !aNumChildren ||
1.74 + !aUniqueID || !aNodeType)
1.75 + return E_INVALIDARG;
1.76 +
1.77 + *aNodeName = nullptr;
1.78 + *aNameSpaceID = 0;
1.79 + *aNodeValue = nullptr;
1.80 + *aNumChildren = 0;
1.81 + *aUniqueID = 0;
1.82 + *aNodeType = 0;
1.83 +
1.84 + if (IsDefunct())
1.85 + return CO_E_OBJNOTCONNECTED;
1.86 +
1.87 + nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mNode));
1.88 +
1.89 + uint16_t nodeType = 0;
1.90 + DOMNode->GetNodeType(&nodeType);
1.91 + *aNodeType = static_cast<unsigned short>(nodeType);
1.92 +
1.93 + if (*aNodeType != NODETYPE_TEXT) {
1.94 + nsAutoString nodeName;
1.95 + DOMNode->GetNodeName(nodeName);
1.96 + *aNodeName = ::SysAllocString(nodeName.get());
1.97 + }
1.98 +
1.99 + nsAutoString nodeValue;
1.100 + DOMNode->GetNodeValue(nodeValue);
1.101 + *aNodeValue = ::SysAllocString(nodeValue.get());
1.102 +
1.103 + *aNameSpaceID = mNode->IsNodeOfType(nsINode::eCONTENT) ?
1.104 + static_cast<short>(mNode->AsContent()->GetNameSpaceID()) : 0;
1.105 +
1.106 + // This is a unique ID for every content node. The 3rd party accessibility
1.107 + // application can compare this to the childID we return for events such as
1.108 + // focus events, to correlate back to data nodes in their internal object
1.109 + // model.
1.110 + Accessible* accessible = GetAccessible();
1.111 + *aUniqueID = - NS_PTR_TO_INT32(accessible ? accessible->UniqueID() :
1.112 + static_cast<void*>(this));
1.113 +
1.114 + *aNumChildren = mNode->GetChildCount();
1.115 +
1.116 + return S_OK;
1.117 +
1.118 + A11Y_TRYBLOCK_END
1.119 +}
1.120 +
1.121 +STDMETHODIMP
1.122 +sdnAccessible::get_attributes(unsigned short aMaxAttribs,
1.123 + BSTR __RPC_FAR* aAttribNames,
1.124 + short __RPC_FAR* aNameSpaceIDs,
1.125 + BSTR __RPC_FAR* aAttribValues,
1.126 + unsigned short __RPC_FAR* aNumAttribs)
1.127 +{
1.128 + A11Y_TRYBLOCK_BEGIN
1.129 +
1.130 + if (!aAttribNames || !aNameSpaceIDs || !aAttribValues || !aNumAttribs)
1.131 + return E_INVALIDARG;
1.132 +
1.133 + *aNumAttribs = 0;
1.134 +
1.135 + if (IsDefunct())
1.136 + return CO_E_OBJNOTCONNECTED;
1.137 +
1.138 + if (!mNode->IsElement())
1.139 + return S_FALSE;
1.140 +
1.141 + dom::Element* elm = mNode->AsElement();
1.142 + uint32_t numAttribs = elm->GetAttrCount();
1.143 + if (numAttribs > aMaxAttribs)
1.144 + numAttribs = aMaxAttribs;
1.145 +
1.146 + *aNumAttribs = static_cast<unsigned short>(numAttribs);
1.147 +
1.148 + for (uint32_t index = 0; index < numAttribs; index++) {
1.149 + aNameSpaceIDs[index] = 0;
1.150 + aAttribValues[index] = aAttribNames[index] = nullptr;
1.151 + nsAutoString attributeValue;
1.152 +
1.153 + const nsAttrName* name = elm->GetAttrNameAt(index);
1.154 + aNameSpaceIDs[index] = static_cast<short>(name->NamespaceID());
1.155 + aAttribNames[index] = ::SysAllocString(name->LocalName()->GetUTF16String());
1.156 + elm->GetAttr(name->NamespaceID(), name->LocalName(), attributeValue);
1.157 + aAttribValues[index] = ::SysAllocString(attributeValue.get());
1.158 + }
1.159 +
1.160 + return S_OK;
1.161 +
1.162 + A11Y_TRYBLOCK_END
1.163 +}
1.164 +
1.165 +STDMETHODIMP
1.166 +sdnAccessible::get_attributesForNames(unsigned short aMaxAttribs,
1.167 + BSTR __RPC_FAR* aAttribNames,
1.168 + short __RPC_FAR* aNameSpaceID,
1.169 + BSTR __RPC_FAR* aAttribValues)
1.170 +{
1.171 + A11Y_TRYBLOCK_BEGIN
1.172 +
1.173 + if (!aAttribNames || !aNameSpaceID || !aAttribValues)
1.174 + return E_INVALIDARG;
1.175 +
1.176 + if (IsDefunct())
1.177 + return CO_E_OBJNOTCONNECTED;
1.178 +
1.179 + if (!mNode->IsElement())
1.180 + return S_FALSE;
1.181 +
1.182 + nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(mNode));
1.183 + nsNameSpaceManager* nameSpaceManager = nsNameSpaceManager::GetInstance();
1.184 +
1.185 + int32_t index = 0;
1.186 + for (index = 0; index < aMaxAttribs; index++) {
1.187 + aAttribValues[index] = nullptr;
1.188 + if (aAttribNames[index]) {
1.189 + nsAutoString attributeValue, nameSpaceURI;
1.190 + nsAutoString attributeName(nsDependentString(
1.191 + static_cast<const wchar_t*>(aAttribNames[index])));
1.192 +
1.193 + nsresult rv = NS_OK;
1.194 + if (aNameSpaceID[index]>0 &&
1.195 + NS_SUCCEEDED(nameSpaceManager->GetNameSpaceURI(aNameSpaceID[index],
1.196 + nameSpaceURI))) {
1.197 + rv = domElement->GetAttributeNS(nameSpaceURI, attributeName,
1.198 + attributeValue);
1.199 + } else {
1.200 + rv = domElement->GetAttribute(attributeName, attributeValue);
1.201 + }
1.202 +
1.203 + if (NS_SUCCEEDED(rv))
1.204 + aAttribValues[index] = ::SysAllocString(attributeValue.get());
1.205 + }
1.206 + }
1.207 +
1.208 + return S_OK;
1.209 +
1.210 + A11Y_TRYBLOCK_END
1.211 +}
1.212 +
1.213 +STDMETHODIMP
1.214 +sdnAccessible::get_computedStyle(unsigned short aMaxStyleProperties,
1.215 + boolean aUseAlternateView,
1.216 + BSTR __RPC_FAR* aStyleProperties,
1.217 + BSTR __RPC_FAR* aStyleValues,
1.218 + unsigned short __RPC_FAR* aNumStyleProperties)
1.219 +{
1.220 + A11Y_TRYBLOCK_BEGIN
1.221 +
1.222 + if (!aStyleProperties || aStyleValues || !aNumStyleProperties)
1.223 + return E_INVALIDARG;
1.224 +
1.225 + if (IsDefunct())
1.226 + return CO_E_OBJNOTCONNECTED;
1.227 +
1.228 + *aNumStyleProperties = 0;
1.229 +
1.230 + if (mNode->IsNodeOfType(nsINode::eDOCUMENT))
1.231 + return S_FALSE;
1.232 +
1.233 + nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl =
1.234 + nsWinUtils::GetComputedStyleDeclaration(mNode->AsContent());
1.235 + NS_ENSURE_TRUE(cssDecl, E_FAIL);
1.236 +
1.237 + uint32_t length = 0;
1.238 + cssDecl->GetLength(&length);
1.239 +
1.240 + uint32_t index = 0, realIndex = 0;
1.241 + for (index = realIndex = 0; index < length && realIndex < aMaxStyleProperties;
1.242 + index ++) {
1.243 + nsAutoString property, value;
1.244 +
1.245 + // Ignore -moz-* properties.
1.246 + if (NS_SUCCEEDED(cssDecl->Item(index, property)) && property.CharAt(0) != '-')
1.247 + cssDecl->GetPropertyValue(property, value); // Get property value
1.248 +
1.249 + if (!value.IsEmpty()) {
1.250 + aStyleProperties[realIndex] = ::SysAllocString(property.get());
1.251 + aStyleValues[realIndex] = ::SysAllocString(value.get());
1.252 + ++realIndex;
1.253 + }
1.254 + }
1.255 +
1.256 + *aNumStyleProperties = static_cast<unsigned short>(realIndex);
1.257 +
1.258 + return S_OK;
1.259 +
1.260 + A11Y_TRYBLOCK_END
1.261 +}
1.262 +
1.263 +STDMETHODIMP
1.264 +sdnAccessible::get_computedStyleForProperties(unsigned short aNumStyleProperties,
1.265 + boolean aUseAlternateView,
1.266 + BSTR __RPC_FAR* aStyleProperties,
1.267 + BSTR __RPC_FAR* aStyleValues)
1.268 +{
1.269 + A11Y_TRYBLOCK_BEGIN
1.270 +
1.271 + if (!aStyleProperties || !aStyleValues)
1.272 + return E_INVALIDARG;
1.273 +
1.274 + if (IsDefunct())
1.275 + return CO_E_OBJNOTCONNECTED;
1.276 +
1.277 + if (mNode->IsNodeOfType(nsINode::eDOCUMENT))
1.278 + return S_FALSE;
1.279 +
1.280 + nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl =
1.281 + nsWinUtils::GetComputedStyleDeclaration(mNode->AsContent());
1.282 + NS_ENSURE_TRUE(cssDecl, E_FAIL);
1.283 +
1.284 + uint32_t index = 0;
1.285 + for (index = 0; index < aNumStyleProperties; index++) {
1.286 + nsAutoString value;
1.287 + if (aStyleProperties[index])
1.288 + cssDecl->GetPropertyValue(nsDependentString(aStyleProperties[index]), value); // Get property value
1.289 + aStyleValues[index] = ::SysAllocString(value.get());
1.290 + }
1.291 +
1.292 + return S_OK;
1.293 +
1.294 + A11Y_TRYBLOCK_END
1.295 +}
1.296 +
1.297 +STDMETHODIMP
1.298 +sdnAccessible::scrollTo(boolean aScrollTopLeft)
1.299 +{
1.300 + A11Y_TRYBLOCK_BEGIN
1.301 +
1.302 + DocAccessible* document = GetDocument();
1.303 + if (!document) // that's IsDefunct check
1.304 + return CO_E_OBJNOTCONNECTED;
1.305 +
1.306 + if (!mNode->IsContent())
1.307 + return S_FALSE;
1.308 +
1.309 + uint32_t scrollType =
1.310 + aScrollTopLeft ? nsIAccessibleScrollType::SCROLL_TYPE_TOP_LEFT :
1.311 + nsIAccessibleScrollType::SCROLL_TYPE_BOTTOM_RIGHT;
1.312 +
1.313 + nsCoreUtils::ScrollTo(document->PresShell(), mNode->AsContent(), scrollType);
1.314 + return S_OK;
1.315 +
1.316 + A11Y_TRYBLOCK_END
1.317 +}
1.318 +
1.319 +STDMETHODIMP
1.320 +sdnAccessible::get_parentNode(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
1.321 +{
1.322 + A11Y_TRYBLOCK_BEGIN
1.323 +
1.324 + if (!aNode)
1.325 + return E_INVALIDARG;
1.326 + *aNode = nullptr;
1.327 +
1.328 + if (IsDefunct())
1.329 + return CO_E_OBJNOTCONNECTED;
1.330 +
1.331 + nsINode* resultNode = mNode->GetParentNode();
1.332 + if (resultNode) {
1.333 + *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
1.334 + (*aNode)->AddRef();
1.335 + }
1.336 +
1.337 + return S_OK;
1.338 +
1.339 + A11Y_TRYBLOCK_END
1.340 +}
1.341 +
1.342 +STDMETHODIMP
1.343 +sdnAccessible::get_firstChild(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
1.344 +{
1.345 + A11Y_TRYBLOCK_BEGIN
1.346 +
1.347 + if (!aNode)
1.348 + return E_INVALIDARG;
1.349 + *aNode = nullptr;
1.350 +
1.351 + if (IsDefunct())
1.352 + return CO_E_OBJNOTCONNECTED;
1.353 +
1.354 + nsINode* resultNode = mNode->GetFirstChild();
1.355 + if (resultNode) {
1.356 + *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
1.357 + (*aNode)->AddRef();
1.358 + }
1.359 +
1.360 + return S_OK;
1.361 +
1.362 + A11Y_TRYBLOCK_END
1.363 +}
1.364 +
1.365 +STDMETHODIMP
1.366 +sdnAccessible::get_lastChild(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
1.367 +{
1.368 + A11Y_TRYBLOCK_BEGIN
1.369 +
1.370 + if (!aNode)
1.371 + return E_INVALIDARG;
1.372 + *aNode = nullptr;
1.373 +
1.374 + if (IsDefunct())
1.375 + return CO_E_OBJNOTCONNECTED;
1.376 +
1.377 + nsINode* resultNode = mNode->GetLastChild();
1.378 + if (resultNode) {
1.379 + *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
1.380 + (*aNode)->AddRef();
1.381 + }
1.382 +
1.383 + return S_OK;
1.384 +
1.385 + A11Y_TRYBLOCK_END
1.386 +}
1.387 +
1.388 +STDMETHODIMP
1.389 +sdnAccessible::get_previousSibling(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
1.390 +{
1.391 + A11Y_TRYBLOCK_BEGIN
1.392 +
1.393 + if (!aNode)
1.394 + return E_INVALIDARG;
1.395 + *aNode = nullptr;
1.396 +
1.397 + if (IsDefunct())
1.398 + return CO_E_OBJNOTCONNECTED;
1.399 +
1.400 + nsINode* resultNode = mNode->GetPreviousSibling();
1.401 + if (resultNode) {
1.402 + *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
1.403 + (*aNode)->AddRef();
1.404 + }
1.405 +
1.406 + return S_OK;
1.407 +
1.408 + A11Y_TRYBLOCK_END
1.409 +}
1.410 +
1.411 +STDMETHODIMP
1.412 +sdnAccessible::get_nextSibling(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
1.413 +{
1.414 + A11Y_TRYBLOCK_BEGIN
1.415 +
1.416 + if (!aNode)
1.417 + return E_INVALIDARG;
1.418 + *aNode = nullptr;
1.419 +
1.420 + if (IsDefunct())
1.421 + return CO_E_OBJNOTCONNECTED;
1.422 +
1.423 + nsINode* resultNode = mNode->GetNextSibling();
1.424 + if (resultNode) {
1.425 + *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
1.426 + (*aNode)->AddRef();
1.427 + }
1.428 +
1.429 + return S_OK;
1.430 +
1.431 + A11Y_TRYBLOCK_END
1.432 +}
1.433 +
1.434 +STDMETHODIMP
1.435 +sdnAccessible::get_childAt(unsigned aChildIndex,
1.436 + ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
1.437 +{
1.438 + A11Y_TRYBLOCK_BEGIN
1.439 +
1.440 + if (!aNode)
1.441 + return E_INVALIDARG;
1.442 + *aNode = nullptr;
1.443 +
1.444 + if (IsDefunct())
1.445 + return CO_E_OBJNOTCONNECTED;
1.446 +
1.447 + nsINode* resultNode = mNode->GetChildAt(aChildIndex);
1.448 + if (resultNode) {
1.449 + *aNode = static_cast<ISimpleDOMNode*>(new sdnAccessible(resultNode));
1.450 + (*aNode)->AddRef();
1.451 + }
1.452 +
1.453 +
1.454 + return S_OK;
1.455 +
1.456 + A11Y_TRYBLOCK_END
1.457 +}
1.458 +
1.459 +STDMETHODIMP
1.460 +sdnAccessible::get_innerHTML(BSTR __RPC_FAR* aInnerHTML)
1.461 +{
1.462 + A11Y_TRYBLOCK_BEGIN
1.463 +
1.464 + if (!aInnerHTML)
1.465 + return E_INVALIDARG;
1.466 + *aInnerHTML = nullptr;
1.467 +
1.468 + if (IsDefunct())
1.469 + return CO_E_OBJNOTCONNECTED;
1.470 +
1.471 + if (!mNode->IsElement())
1.472 + return S_FALSE;
1.473 +
1.474 + nsAutoString innerHTML;
1.475 + mNode->AsElement()->GetInnerHTML(innerHTML);
1.476 + if (innerHTML.IsEmpty())
1.477 + return S_FALSE;
1.478 +
1.479 + *aInnerHTML = ::SysAllocStringLen(innerHTML.get(), innerHTML.Length());
1.480 + if (!*aInnerHTML)
1.481 + return E_OUTOFMEMORY;
1.482 +
1.483 + return S_OK;
1.484 +
1.485 + A11Y_TRYBLOCK_END
1.486 +}
1.487 +
1.488 +STDMETHODIMP
1.489 +sdnAccessible::get_localInterface(void __RPC_FAR *__RPC_FAR* aLocalInterface)
1.490 +{
1.491 + A11Y_TRYBLOCK_BEGIN
1.492 +
1.493 + if (!aLocalInterface)
1.494 + return E_INVALIDARG;
1.495 + *aLocalInterface = nullptr;
1.496 +
1.497 + if (IsDefunct())
1.498 + return CO_E_OBJNOTCONNECTED;
1.499 +
1.500 + *aLocalInterface = this;
1.501 + AddRef();
1.502 +
1.503 + return S_OK;
1.504 +
1.505 + A11Y_TRYBLOCK_END
1.506 +}
1.507 +
1.508 +STDMETHODIMP
1.509 +sdnAccessible::get_language(BSTR __RPC_FAR* aLanguage)
1.510 +{
1.511 + A11Y_TRYBLOCK_BEGIN
1.512 +
1.513 + if (!aLanguage)
1.514 + return E_INVALIDARG;
1.515 + *aLanguage = nullptr;
1.516 +
1.517 + if (IsDefunct())
1.518 + return CO_E_OBJNOTCONNECTED;
1.519 +
1.520 + nsAutoString language;
1.521 + if (mNode->IsContent())
1.522 + nsCoreUtils::GetLanguageFor(mNode->AsContent(), nullptr, language);
1.523 + if (language.IsEmpty()) { // Nothing found, so use document's language
1.524 + mNode->OwnerDoc()->GetHeaderData(nsGkAtoms::headerContentLanguage,
1.525 + language);
1.526 + }
1.527 +
1.528 + if (language.IsEmpty())
1.529 + return S_FALSE;
1.530 +
1.531 + *aLanguage = ::SysAllocStringLen(language.get(), language.Length());
1.532 + if (!*aLanguage)
1.533 + return E_OUTOFMEMORY;
1.534 +
1.535 + return S_OK;
1.536 +
1.537 + A11Y_TRYBLOCK_END
1.538 +}
