mirror of
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197 lines
5.8 KiB
C++
197 lines
5.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "OuterDocAccessible.h"
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#include "Accessible-inl.h"
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#include "nsAccUtils.h"
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#include "DocAccessible-inl.h"
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#include "mozilla/a11y/DocAccessibleParent.h"
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#include "mozilla/dom/TabParent.h"
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#include "Role.h"
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#include "States.h"
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#ifdef A11Y_LOG
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#include "Logging.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// OuterDocAccessible
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////////////////////////////////////////////////////////////////////////////////
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OuterDocAccessible::
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OuterDocAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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AccessibleWrap(aContent, aDoc)
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{
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mType = eOuterDocType;
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}
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OuterDocAccessible::~OuterDocAccessible()
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{
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}
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////////////////////////////////////////////////////////////////////////////////
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// nsISupports
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NS_IMPL_ISUPPORTS_INHERITED0(OuterDocAccessible,
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Accessible)
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////////////////////////////////////////////////////////////////////////////////
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// Accessible public (DON'T add methods here)
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role
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OuterDocAccessible::NativeRole()
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{
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return roles::INTERNAL_FRAME;
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}
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Accessible*
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OuterDocAccessible::ChildAtPoint(int32_t aX, int32_t aY,
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EWhichChildAtPoint aWhichChild)
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{
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nsIntRect docRect = Bounds();
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if (aX < docRect.x || aX >= docRect.x + docRect.width ||
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aY < docRect.y || aY >= docRect.y + docRect.height)
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return nullptr;
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// Always return the inner doc as direct child accessible unless bounds
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// outside of it.
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Accessible* child = GetChildAt(0);
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NS_ENSURE_TRUE(child, nullptr);
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if (aWhichChild == eDeepestChild)
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return child->ChildAtPoint(aX, aY, eDeepestChild);
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return child;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Accessible public
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void
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OuterDocAccessible::Shutdown()
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{
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// XXX: sometimes outerdoc accessible is shutdown because of layout style
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// change however the presshell of underlying document isn't destroyed and
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// the document doesn't get pagehide events. Schedule a document rebind
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// to its parent document. Otherwise a document accessible may be lost if its
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// outerdoc has being recreated (see bug 862863 for details).
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eDocDestroy))
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logging::OuterDocDestroy(this);
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#endif
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Accessible* child = mChildren.SafeElementAt(0, nullptr);
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if (child) {
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eDocDestroy)) {
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logging::DocDestroy("outerdoc's child document rebind is scheduled",
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child->AsDoc()->DocumentNode());
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}
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#endif
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RemoveChild(child);
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mDoc->BindChildDocument(child->AsDoc());
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}
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AccessibleWrap::Shutdown();
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}
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void
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OuterDocAccessible::InvalidateChildren()
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{
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// Do not invalidate children because DocManager is responsible for
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// document accessible lifetime when DOM document is created or destroyed. If
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// DOM document isn't destroyed but its presshell is destroyed (for example,
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// when DOM node of outerdoc accessible is hidden), then outerdoc accessible
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// notifies DocManager about this. If presshell is created for existing
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// DOM document (for example when DOM node of outerdoc accessible is shown)
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// then allow DocManager to handle this case since the document
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// accessible is created and appended as a child when it's requested.
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SetChildrenFlag(eChildrenUninitialized);
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}
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bool
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OuterDocAccessible::InsertChildAt(uint32_t aIdx, Accessible* aAccessible)
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{
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NS_ASSERTION(aAccessible->IsDoc(),
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"OuterDocAccessible should only have document child!");
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// We keep showing the old document for a bit after creating the new one,
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// and while building the new DOM and frame tree. That's done on purpose
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// to avoid weird flashes of default background color.
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// The old viewer will be destroyed after the new one is created.
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// For a11y, it should be safe to shut down the old document now.
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if (mChildren.Length())
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mChildren[0]->Shutdown();
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if (!AccessibleWrap::InsertChildAt(0, aAccessible))
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return false;
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eDocCreate)) {
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logging::DocCreate("append document to outerdoc",
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aAccessible->AsDoc()->DocumentNode());
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logging::Address("outerdoc", this);
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}
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#endif
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return true;
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}
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bool
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OuterDocAccessible::RemoveChild(Accessible* aAccessible)
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{
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Accessible* child = mChildren.SafeElementAt(0, nullptr);
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if (child != aAccessible) {
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NS_ERROR("Wrong child to remove!");
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return false;
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}
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eDocDestroy)) {
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logging::DocDestroy("remove document from outerdoc",
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child->AsDoc()->DocumentNode(), child->AsDoc());
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logging::Address("outerdoc", this);
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}
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#endif
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bool wasRemoved = AccessibleWrap::RemoveChild(child);
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NS_ASSERTION(!mChildren.Length(),
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"This child document of outerdoc accessible wasn't removed!");
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return wasRemoved;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Accessible protected
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void
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OuterDocAccessible::CacheChildren()
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{
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// Request document accessible for the content document to make sure it's
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// created. It will appended to outerdoc accessible children asynchronously.
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nsIDocument* outerDoc = mContent->GetCurrentDoc();
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if (outerDoc) {
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nsIDocument* innerDoc = outerDoc->GetSubDocumentFor(mContent);
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if (innerDoc)
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GetAccService()->GetDocAccessible(innerDoc);
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}
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}
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ProxyAccessible*
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OuterDocAccessible::RemoteChildDoc() const
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{
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dom::TabParent* tab = dom::TabParent::GetFrom(GetContent());
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if (!tab)
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return nullptr;
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return tab->GetTopLevelDocAccessible();
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}
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