gecko-dev/accessible/html/HTMLListAccessible.cpp

166 строки
5.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "HTMLListAccessible.h"
#include "DocAccessible.h"
#include "nsAccUtils.h"
#include "Role.h"
#include "States.h"
#include "nsContainerFrame.h"
#include "nsLayoutUtils.h"
using namespace mozilla;
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// HTMLListAccessible
////////////////////////////////////////////////////////////////////////////////
role HTMLListAccessible::NativeRole() const {
a11y::role r = GetAccService()->MarkupRole(mContent);
return r != roles::NOTHING ? r : roles::LIST;
}
uint64_t HTMLListAccessible::NativeState() const {
return HyperTextAccessibleWrap::NativeState() | states::READONLY;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLLIAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLLIAccessible::HTMLLIAccessible(nsIContent* aContent, DocAccessible* aDoc)
: HyperTextAccessibleWrap(aContent, aDoc), mBullet(nullptr) {
mType = eHTMLLiType;
if (nsLayoutUtils::GetMarkerFrame(aContent)) {
mBullet = new HTMLListBulletAccessible(mContent, mDoc);
Document()->BindToDocument(mBullet, nullptr);
AppendChild(mBullet);
}
}
void HTMLLIAccessible::Shutdown() {
mBullet = nullptr;
HyperTextAccessibleWrap::Shutdown();
}
role HTMLLIAccessible::NativeRole() const {
a11y::role r = GetAccService()->MarkupRole(mContent);
return r != roles::NOTHING ? r : roles::LISTITEM;
}
uint64_t HTMLLIAccessible::NativeState() const {
return HyperTextAccessibleWrap::NativeState() | states::READONLY;
}
nsRect HTMLLIAccessible::BoundsInAppUnits() const {
nsRect rect = AccessibleWrap::BoundsInAppUnits();
if (rect.IsEmpty() || !mBullet || mBullet->IsInside()) {
return rect;
}
nsRect bulletRect = mBullet->BoundsInAppUnits();
// Move x coordinate of list item over to cover bullet as well
rect.SetLeftEdge(bulletRect.X());
return rect;
}
bool HTMLLIAccessible::InsertChildAt(uint32_t aIndex, Accessible* aChild) {
// Adjust index if there's a bullet.
if (mBullet && aIndex == 0 && aChild != mBullet) {
return HyperTextAccessible::InsertChildAt(aIndex + 1, aChild);
}
return HyperTextAccessible::InsertChildAt(aIndex, aChild);
}
void HTMLLIAccessible::RelocateChild(uint32_t aNewIndex, Accessible* aChild) {
// Don't allow moving a child in front of the bullet.
if (mBullet && aChild != mBullet && aNewIndex != 0) {
HyperTextAccessible::RelocateChild(aNewIndex, aChild);
}
}
////////////////////////////////////////////////////////////////////////////////
// HTMLLIAccessible: public
void HTMLLIAccessible::UpdateBullet(bool aHasBullet) {
if (aHasBullet == !!mBullet) {
MOZ_ASSERT_UNREACHABLE("Bullet and accessible are in sync already!");
return;
}
TreeMutation mt(this);
if (aHasBullet) {
mBullet = new HTMLListBulletAccessible(mContent, mDoc);
mDoc->BindToDocument(mBullet, nullptr);
InsertChildAt(0, mBullet);
mt.AfterInsertion(mBullet);
} else {
mt.BeforeRemoval(mBullet);
RemoveChild(mBullet);
mBullet = nullptr;
}
mt.Done();
}
////////////////////////////////////////////////////////////////////////////////
// HTMLListBulletAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLListBulletAccessible::HTMLListBulletAccessible(nsIContent* aContent,
DocAccessible* aDoc)
: LeafAccessible(aContent, aDoc) {
mGenericTypes |= eText;
mStateFlags |= eSharedNode;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLListBulletAccessible: Accessible
nsIFrame* HTMLListBulletAccessible::GetFrame() const {
return nsLayoutUtils::GetMarkerFrame(mContent);
}
ENameValueFlag HTMLListBulletAccessible::Name(nsString& aName) const {
aName.Truncate();
// Native anonymous content, ARIA can't be used. Get list bullet text.
if (nsContainerFrame* frame = do_QueryFrame(mContent->GetPrimaryFrame())) {
frame->GetSpokenMarkerText(aName);
}
return eNameOK;
}
role HTMLListBulletAccessible::NativeRole() const { return roles::STATICTEXT; }
uint64_t HTMLListBulletAccessible::NativeState() const {
return LeafAccessible::NativeState() | states::READONLY;
}
void HTMLListBulletAccessible::AppendTextTo(nsAString& aText,
uint32_t aStartOffset,
uint32_t aLength) {
nsAutoString bulletText;
Name(bulletText);
aText.Append(Substring(bulletText, aStartOffset, aLength));
}
////////////////////////////////////////////////////////////////////////////////
// HTMLListBulletAccessible: public
bool HTMLListBulletAccessible::IsInside() const {
if (nsIFrame* frame = mContent->GetPrimaryFrame()) {
return frame->StyleList()->mListStylePosition ==
NS_STYLE_LIST_STYLE_POSITION_INSIDE;
}
return false;
}