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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /accessible/html/HTMLImageMapAccessible.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'accessible/html/HTMLImageMapAccessible.cpp')
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1 files changed, 200 insertions, 0 deletions
diff --git a/accessible/html/HTMLImageMapAccessible.cpp b/accessible/html/HTMLImageMapAccessible.cpp
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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 "EventTree.h"
+#include "mozilla/a11y/Role.h"
+
+#include "nsCoreUtils.h"
+#include "nsIFrame.h"
+#include "nsImageFrame.h"
+#include "nsImageMap.h"
+#include "nsLayoutUtils.h"
+#include "mozilla/dom/HTMLAreaElement.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+HTMLImageMapAccessible::HTMLImageMapAccessible(nsIContent* aContent,
+ DocAccessible* aDoc)
+ : ImageAccessible(aContent, aDoc) {
+ mType = eImageMapType;
+
+ UpdateChildAreas(false);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: LocalAccessible public
+
+role HTMLImageMapAccessible::NativeRole() const { return roles::IMAGE_MAP; }
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: public
+
+void HTMLImageMapAccessible::UpdateChildAreas(bool aDoFireEvents) {
+ if (!mContent || !mContent->GetPrimaryFrame()) {
+ return;
+ }
+ 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--) {
+ LocalAccessible* 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);
+ LocalAccessible* area = mChildren.SafeElementAt(idx);
+ if (!area || area->GetContent() != areaContent) {
+ RefPtr<LocalAccessible> 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();
+}
+
+LocalAccessible* HTMLImageMapAccessible::GetChildAccessibleFor(
+ const nsINode* aNode) const {
+ uint32_t length = mChildren.Length();
+ for (uint32_t i = 0; i < length; i++) {
+ LocalAccessible* 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: LocalAccessible
+
+role HTMLAreaAccessible::NativeRole() const {
+ // A link element without an href attribute and without a click listener
+ // should be reported as a generic.
+ if (mContent->IsElement()) {
+ dom::Element* element = mContent->AsElement();
+ if (!element->HasAttr(nsGkAtoms::href) &&
+ !nsCoreUtils::HasClickListener(element)) {
+ return roles::TEXT;
+ }
+ }
+ return HTMLLinkAccessible::NativeRole();
+}
+
+ENameValueFlag HTMLAreaAccessible::NativeName(nsString& aName) const {
+ ENameValueFlag nameFlag = LocalAccessible::NativeName(aName);
+ if (!aName.IsEmpty()) return nameFlag;
+
+ if (!mContent->AsElement()->GetAttr(nsGkAtoms::alt, aName)) {
+ Value(aName);
+ }
+
+ return eNameOK;
+}
+
+void HTMLAreaAccessible::Description(nsString& aDescription) const {
+ aDescription.Truncate();
+
+ // Still to do - follow IE's standard here
+ RefPtr<dom::HTMLAreaElement> area =
+ dom::HTMLAreaElement::FromNodeOrNull(mContent);
+ if (area) area->GetShape(aDescription);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLAreaAccessible: LocalAccessible public
+
+LocalAccessible* HTMLAreaAccessible::LocalChildAtPoint(
+ 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 LocalAccessible 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.SizeTo(bounds.Width() - bounds.X(), bounds.Height() - bounds.Y());
+ return bounds;
+}
+
+nsRect HTMLAreaAccessible::ParentRelativeBounds() {
+ nsIFrame* boundingFrame = nullptr;
+ nsRect relativeBoundsRect = RelativeBounds(&boundingFrame);
+ if (MOZ_UNLIKELY(!boundingFrame)) {
+ // Area is not attached to an image map?
+ return nsRect();
+ }
+
+ // The relative bounds returned above are relative to this area's
+ // image map, which is technically already "parent relative".
+ // Because area elements are `display:none` to layout, they can't
+ // have transforms or other styling applied directly, and so we
+ // don't apply any additional transforms here. Any transform
+ // at the image map layer will be taken care of when computing bounds
+ // in the parent process.
+ return relativeBoundsRect;
+}