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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "HTMLImageMapAccessible.h"
#include "ARIAMap.h"
#include "nsAccUtils.h"
#include "DocAccessible-inl.h"
#include "Role.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIServiceManager.h"
#include "nsIDOMElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIFrame.h"
#include "nsImageFrame.h"
#include "nsImageMap.h"
#include "nsIURI.h"
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLImageMapAccessible::
HTMLImageMapAccessible(nsIContent* aContent, DocAccessible* aDoc) :
ImageAccessibleWrap(aContent, aDoc)
{
mType = eImageMapType;
UpdateChildAreas(false);
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: nsISupports
NS_IMPL_ISUPPORTS_INHERITED0(HTMLImageMapAccessible, ImageAccessible)
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: Accessible public
role
HTMLImageMapAccessible::NativeRole()
{
return roles::IMAGE_MAP;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: HyperLinkAccessible
uint32_t
HTMLImageMapAccessible::AnchorCount()
{
return ChildCount();
}
Accessible*
HTMLImageMapAccessible::AnchorAt(uint32_t aAnchorIndex)
{
return GetChildAt(aAnchorIndex);
}
already_AddRefed<nsIURI>
HTMLImageMapAccessible::AnchorURIAt(uint32_t aAnchorIndex)
{
Accessible* area = GetChildAt(aAnchorIndex);
if (!area)
return nullptr;
nsIContent* linkContent = area->GetContent();
return linkContent ? linkContent->GetHrefURI() : nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: public
void
HTMLImageMapAccessible::UpdateChildAreas(bool aDoFireEvents)
{
nsImageFrame* imageFrame = do_QueryFrame(mContent->GetPrimaryFrame());
// If image map is not initialized yet then we trigger one time more later.
nsImageMap* imageMapObj = imageFrame->GetExistingImageMap();
if (!imageMapObj)
return;
TreeMutation mt(this, TreeMutation::kNoEvents & !aDoFireEvents);
// Remove areas that are not a valid part of the image map anymore.
for (int32_t childIdx = mChildren.Length() - 1; childIdx >= 0; childIdx--) {
Accessible* area = mChildren.ElementAt(childIdx);
if (area->GetContent()->GetPrimaryFrame())
continue;
mt.BeforeRemoval(area);
RemoveChild(area);
}
// Insert new areas into the tree.
uint32_t areaElmCount = imageMapObj->AreaCount();
for (uint32_t idx = 0; idx < areaElmCount; idx++) {
nsIContent* areaContent = imageMapObj->GetAreaAt(idx);
Accessible* area = mChildren.SafeElementAt(idx);
if (!area || area->GetContent() != areaContent) {
RefPtr<Accessible> area = new HTMLAreaAccessible(areaContent, mDoc);
mDoc->BindToDocument(area, aria::GetRoleMap(areaContent->AsElement()));
if (!InsertChildAt(idx, area)) {
mDoc->UnbindFromDocument(area);
break;
}
mt.AfterInsertion(area);
}
}
mt.Done();
}
Accessible*
HTMLImageMapAccessible::GetChildAccessibleFor(const nsINode* aNode) const
{
uint32_t length = mChildren.Length();
for (uint32_t i = 0; i < length; i++) {
Accessible* area = mChildren[i];
if (area->GetContent() == aNode)
return area;
}
return nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLAreaAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLAreaAccessible::
HTMLAreaAccessible(nsIContent* aContent, DocAccessible* aDoc) :
HTMLLinkAccessible(aContent, aDoc)
{
// Make HTML area DOM element not accessible. HTML image map accessible
// manages its tree itself.
mStateFlags |= eNotNodeMapEntry;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLAreaAccessible: Accessible
ENameValueFlag
HTMLAreaAccessible::NativeName(nsString& aName)
{
ENameValueFlag nameFlag = Accessible::NativeName(aName);
if (!aName.IsEmpty())
return nameFlag;
if (!mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName))
Value(aName);
return eNameOK;
}
void
HTMLAreaAccessible::Description(nsString& aDescription)
{
aDescription.Truncate();
// Still to do - follow IE's standard here
nsCOMPtr<nsIDOMHTMLAreaElement> area(do_QueryInterface(mContent));
if (area)
area->GetShape(aDescription);
}
////////////////////////////////////////////////////////////////////////////////
// HTMLAreaAccessible: Accessible public
Accessible*
HTMLAreaAccessible::ChildAtPoint(int32_t aX, int32_t aY,
EWhichChildAtPoint aWhichChild)
{
// Don't walk into area accessibles.
return this;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: HyperLinkAccessible
uint32_t
HTMLAreaAccessible::StartOffset()
{
// Image map accessible is not hypertext accessible therefore
// StartOffset/EndOffset implementations of Accessible doesn't work here.
// We return index in parent because image map contains area links only which
// are embedded objects.
// XXX: image map should be a hypertext accessible.
return IndexInParent();
}
uint32_t
HTMLAreaAccessible::EndOffset()
{
return IndexInParent() + 1;
}
nsRect
HTMLAreaAccessible::RelativeBounds(nsIFrame** aBoundingFrame) const
{
nsIFrame* frame = GetFrame();
if (!frame)
return nsRect();
nsImageFrame* imageFrame = do_QueryFrame(frame);
nsImageMap* map = imageFrame->GetImageMap();
nsRect bounds;
nsresult rv = map->GetBoundsForAreaContent(mContent, bounds);
if (NS_FAILED(rv))
return nsRect();
// XXX Areas are screwy; they return their rects as a pair of points, one pair
// stored into the width and height.
*aBoundingFrame = frame;
bounds.width -= bounds.x;
bounds.height -= bounds.y;
return bounds;
}
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