michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 "HTMLImageMapAccessible.h"
michael@0: 
michael@0: #include "ARIAMap.h"
michael@0: #include "nsAccUtils.h"
michael@0: #include "DocAccessible-inl.h"
michael@0: #include "Role.h"
michael@0: 
michael@0: #include "nsIDOMHTMLCollection.h"
michael@0: #include "nsIServiceManager.h"
michael@0: #include "nsIDOMElement.h"
michael@0: #include "nsIDOMHTMLAreaElement.h"
michael@0: #include "nsIFrame.h"
michael@0: #include "nsImageFrame.h"
michael@0: #include "nsImageMap.h"
michael@0: #include "nsIURI.h"
michael@0: 
michael@0: using namespace mozilla::a11y;
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: HTMLImageMapAccessible::
michael@0:   HTMLImageMapAccessible(nsIContent* aContent, DocAccessible* aDoc) :
michael@0:   ImageAccessibleWrap(aContent, aDoc)
michael@0: {
michael@0:   mType = eImageMapType;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible: nsISupports
michael@0: 
michael@0: NS_IMPL_ISUPPORTS_INHERITED0(HTMLImageMapAccessible, ImageAccessible)
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible: Accessible public
michael@0: 
michael@0: role
michael@0: HTMLImageMapAccessible::NativeRole()
michael@0: {
michael@0:   return roles::IMAGE_MAP;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible: HyperLinkAccessible
michael@0: 
michael@0: uint32_t
michael@0: HTMLImageMapAccessible::AnchorCount()
michael@0: {
michael@0:   return ChildCount();
michael@0: }
michael@0: 
michael@0: Accessible*
michael@0: HTMLImageMapAccessible::AnchorAt(uint32_t aAnchorIndex)
michael@0: {
michael@0:   return GetChildAt(aAnchorIndex);
michael@0: }
michael@0: 
michael@0: already_AddRefed<nsIURI>
michael@0: HTMLImageMapAccessible::AnchorURIAt(uint32_t aAnchorIndex)
michael@0: {
michael@0:   Accessible* area = GetChildAt(aAnchorIndex);
michael@0:   if (!area)
michael@0:     return nullptr;
michael@0: 
michael@0:   nsIContent* linkContent = area->GetContent();
michael@0:   return linkContent ? linkContent->GetHrefURI() : nullptr;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible: public
michael@0: 
michael@0: void
michael@0: HTMLImageMapAccessible::UpdateChildAreas(bool aDoFireEvents)
michael@0: {
michael@0:   nsImageFrame* imageFrame = do_QueryFrame(mContent->GetPrimaryFrame());
michael@0: 
michael@0:   // If image map is not initialized yet then we trigger one time more later.
michael@0:   nsImageMap* imageMapObj = imageFrame->GetExistingImageMap();
michael@0:   if (!imageMapObj)
michael@0:     return;
michael@0: 
michael@0:   bool doReorderEvent = false;
michael@0:   nsRefPtr<AccReorderEvent> reorderEvent = new AccReorderEvent(this);
michael@0: 
michael@0:   // Remove areas that are not a valid part of the image map anymore.
michael@0:   for (int32_t childIdx = mChildren.Length() - 1; childIdx >= 0; childIdx--) {
michael@0:     Accessible* area = mChildren.ElementAt(childIdx);
michael@0:     if (area->GetContent()->GetPrimaryFrame())
michael@0:       continue;
michael@0: 
michael@0:     if (aDoFireEvents) {
michael@0:       nsRefPtr<AccHideEvent> event = new AccHideEvent(area, area->GetContent());
michael@0:       mDoc->FireDelayedEvent(event);
michael@0:       reorderEvent->AddSubMutationEvent(event);
michael@0:       doReorderEvent = true;
michael@0:     }
michael@0: 
michael@0:     RemoveChild(area);
michael@0:   }
michael@0: 
michael@0:   // Insert new areas into the tree.
michael@0:   uint32_t areaElmCount = imageMapObj->AreaCount();
michael@0:   for (uint32_t idx = 0; idx < areaElmCount; idx++) {
michael@0:     nsIContent* areaContent = imageMapObj->GetAreaAt(idx);
michael@0: 
michael@0:     Accessible* area = mChildren.SafeElementAt(idx);
michael@0:     if (!area || area->GetContent() != areaContent) {
michael@0:       nsRefPtr<Accessible> area = new HTMLAreaAccessible(areaContent, mDoc);
michael@0:       mDoc->BindToDocument(area, aria::GetRoleMap(areaContent));
michael@0: 
michael@0:       if (!InsertChildAt(idx, area)) {
michael@0:         mDoc->UnbindFromDocument(area);
michael@0:         break;
michael@0:       }
michael@0: 
michael@0:       if (aDoFireEvents) {
michael@0:         nsRefPtr<AccShowEvent> event = new AccShowEvent(area, areaContent);
michael@0:         mDoc->FireDelayedEvent(event);
michael@0:         reorderEvent->AddSubMutationEvent(event);
michael@0:         doReorderEvent = true;
michael@0:       }
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   // Fire reorder event if needed.
michael@0:   if (doReorderEvent)
michael@0:     mDoc->FireDelayedEvent(reorderEvent);
michael@0: }
michael@0: 
michael@0: Accessible*
michael@0: HTMLImageMapAccessible::GetChildAccessibleFor(const nsINode* aNode) const
michael@0: {
michael@0:   uint32_t length = mChildren.Length();
michael@0:   for (uint32_t i = 0; i < length; i++) {
michael@0:     Accessible* area = mChildren[i];
michael@0:     if (area->GetContent() == aNode)
michael@0:       return area;
michael@0:   }
michael@0: 
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible: Accessible protected
michael@0: 
michael@0: void
michael@0: HTMLImageMapAccessible::CacheChildren()
michael@0: {
michael@0:   UpdateChildAreas(false);
michael@0: }
michael@0: 
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLAreaAccessible
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: HTMLAreaAccessible::
michael@0:   HTMLAreaAccessible(nsIContent* aContent, DocAccessible* aDoc) :
michael@0:   HTMLLinkAccessible(aContent, aDoc)
michael@0: {
michael@0:   // Make HTML area DOM element not accessible. HTML image map accessible
michael@0:   // manages its tree itself.
michael@0:   mStateFlags |= eNotNodeMapEntry;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLAreaAccessible: nsIAccessible
michael@0: 
michael@0: ENameValueFlag
michael@0: HTMLAreaAccessible::NativeName(nsString& aName)
michael@0: {
michael@0:   ENameValueFlag nameFlag = Accessible::NativeName(aName);
michael@0:   if (!aName.IsEmpty())
michael@0:     return nameFlag;
michael@0: 
michael@0:   if (!mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName))
michael@0:     GetValue(aName);
michael@0: 
michael@0:   return eNameOK;
michael@0: }
michael@0: 
michael@0: void
michael@0: HTMLAreaAccessible::Description(nsString& aDescription)
michael@0: {
michael@0:   aDescription.Truncate();
michael@0: 
michael@0:   // Still to do - follow IE's standard here
michael@0:   nsCOMPtr<nsIDOMHTMLAreaElement> area(do_QueryInterface(mContent));
michael@0:   if (area)
michael@0:     area->GetShape(aDescription);
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLAreaAccessible: Accessible public
michael@0: 
michael@0: Accessible*
michael@0: HTMLAreaAccessible::ChildAtPoint(int32_t aX, int32_t aY,
michael@0:                                  EWhichChildAtPoint aWhichChild)
michael@0: {
michael@0:   // Don't walk into area accessibles.
michael@0:   return this;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLImageMapAccessible: HyperLinkAccessible
michael@0: 
michael@0: uint32_t
michael@0: HTMLAreaAccessible::StartOffset()
michael@0: {
michael@0:   // Image map accessible is not hypertext accessible therefore
michael@0:   // StartOffset/EndOffset implementations of Accessible doesn't work here.
michael@0:   // We return index in parent because image map contains area links only which
michael@0:   // are embedded objects.
michael@0:   // XXX: image map should be a hypertext accessible.
michael@0:   return IndexInParent();
michael@0: }
michael@0: 
michael@0: uint32_t
michael@0: HTMLAreaAccessible::EndOffset()
michael@0: {
michael@0:   return IndexInParent() + 1;
michael@0: }
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // HTMLAreaAccessible: Accessible protected
michael@0: 
michael@0: void
michael@0: HTMLAreaAccessible::CacheChildren()
michael@0: {
michael@0:   // No children for aria accessible.
michael@0: }
michael@0: 
michael@0: void
michael@0: HTMLAreaAccessible::GetBoundsRect(nsRect& aBounds, nsIFrame** aBoundingFrame)
michael@0: {
michael@0:   nsIFrame* frame = GetFrame();
michael@0:   if (!frame)
michael@0:     return;
michael@0: 
michael@0:   nsImageFrame* imageFrame = do_QueryFrame(frame);
michael@0:   nsImageMap* map = imageFrame->GetImageMap();
michael@0: 
michael@0:   nsresult rv = map->GetBoundsForAreaContent(mContent, aBounds);
michael@0:   if (NS_FAILED(rv))
michael@0:     return;
michael@0: 
michael@0:   // XXX Areas are screwy; they return their rects as a pair of points, one pair
michael@0:   // stored into the width and height.
michael@0:   aBounds.width -= aBounds.x;
michael@0:   aBounds.height -= aBounds.y;
michael@0: 
michael@0:   *aBoundingFrame = frame;
michael@0: }