static nsEventStates
GetStatesForPseudoClass(const nsAString& aStatePseudo)
{
// An array of the states that are relevant for various pseudoclasses.
// XXXbz this duplicates code in nsCSSRuleProcessor
static const nsEventStates sPseudoClassStates[] = {
#define CSS_PSEUDO_CLASS(_name, _value) \
nsEventStates(),
#define CSS_STATE_PSEUDO_CLASS(_name, _value, _states) \
_states,
#include "nsCSSPseudoClassList.h"
#undef CSS_STATE_PSEUDO_CLASS
#undef CSS_PSEUDO_CLASS
// Add more entries for our fake values to make sure we can't
// index out of bounds into this array no matter what.
nsEventStates(),
nsEventStates()
};
MOZ_STATIC_ASSERT(NS_ARRAY_LENGTH(sPseudoClassStates) ==
nsCSSPseudoClasses::ePseudoClass_NotPseudoClass + 1,
"Length of PseudoClassStates array is incorrect");
nsCOMPtr<nsIAtom> atom = do_GetAtom(aStatePseudo);
// Ignore :moz-any-link so we don't give the element simultaneous
// visited and unvisited style state
if (nsCSSPseudoClasses::GetPseudoType(atom) ==
nsCSSPseudoClasses::ePseudoClass_mozAnyLink) {
return nsEventStates();
}
// Our array above is long enough that indexing into it with
// NotPseudoClass is ok.
return sPseudoClassStates[nsCSSPseudoClasses::GetPseudoType(atom)];
}
nsEventStates
nsNativeTheme::GetContentState(nsIFrame* aFrame, PRUint8 aWidgetType)
{
if (!aFrame)
return nsEventStates();
PRBool isXULCheckboxRadio =
(aWidgetType == NS_THEME_CHECKBOX ||
aWidgetType == NS_THEME_RADIO) &&
aFrame->GetContent()->IsXUL();
if (isXULCheckboxRadio)
aFrame = aFrame->GetParent();
if (!aFrame->GetContent())
return nsEventStates();
nsIPresShell *shell = GetPresShell(aFrame);
if (!shell)
return nsEventStates();
nsIContent* frameContent = aFrame->GetContent();
nsEventStates flags;
if (frameContent->IsElement()) {
flags = frameContent->AsElement()->State();
}
if (isXULCheckboxRadio && aWidgetType == NS_THEME_RADIO) {
if (IsFocused(aFrame))
flags |= NS_EVENT_STATE_FOCUS;
}
// On Windows and Mac, only draw focus rings if they should be shown. This
// means that focus rings are only shown once the keyboard has been used to
// focus something in the window.
#if defined(XP_MACOSX)
// Mac always draws focus rings for textboxes and lists.
if (aWidgetType == NS_THEME_TEXTFIELD ||
aWidgetType == NS_THEME_TEXTFIELD_MULTILINE ||
aWidgetType == NS_THEME_SEARCHFIELD ||
aWidgetType == NS_THEME_LISTBOX) {
return flags;
}
#endif
#if defined(XP_WIN)
// On Windows, focused buttons are always drawn as such by the native theme.
if (aWidgetType == NS_THEME_BUTTON)
return flags;
#endif
#if defined(XP_MACOSX) || defined(XP_WIN)
nsIDocument* doc = aFrame->GetContent()->GetOwnerDoc();
if (doc) {
nsPIDOMWindow* window = doc->GetWindow();
if (window && !window->ShouldShowFocusRing())
flags &= ~NS_EVENT_STATE_FOCUS;
}
#endif
return flags;
}
nsEventStates
Link::LinkState() const
{
// We are a constant method, but we are just lazily doing things and have to
// track that state. Cast away that constness!
Link *self = const_cast<Link *>(this);
// If we are not in the document, default to not visited.
Element *element = self->mElement;
if (!element->IsInDoc()) {
self->mLinkState = eLinkState_Unvisited;
}
// If we have not yet registered for notifications and are in an unknown
// state, register now!
if (!mRegistered && mLinkState == eLinkState_Unknown) {
// First, make sure the href attribute has a valid link (bug 23209).
nsCOMPtr<nsIURI> hrefURI(GetURI());
if (!hrefURI) {
self->mLinkState = eLinkState_NotLink;
return nsEventStates();
}
// Assume that we are not visited until we are told otherwise.
self->mLinkState = eLinkState_Unvisited;
// We have a good href, so register with History.
if (mHistory) {
nsresult rv = mHistory->RegisterVisitedCallback(hrefURI, self);
if (NS_SUCCEEDED(rv)) {
self->mRegistered = true;
// And make sure we are in the document's link map.
nsIDocument *doc = element->GetCurrentDoc();
if (doc) {
doc->AddStyleRelevantLink(self);
}
}
}
}
// Otherwise, return our known state.
if (mLinkState == eLinkState_Visited) {
return NS_EVENT_STATE_VISITED;
}
if (mLinkState == eLinkState_Unvisited) {
return NS_EVENT_STATE_UNVISITED;
}
return nsEventStates();
}
nsresult
nsImageLoadingContent::ForceImageState(PRBool aForce, nsEventStates::InternalType aState)
{
NS_ENSURE_TRUE(nsContentUtils::IsCallerChrome(), NS_ERROR_NOT_AVAILABLE);
mIsImageStateForced = aForce;
mForcedImageState = nsEventStates(aState);
return NS_OK;
}
void
Link::ResetLinkState(bool aNotify, bool aHasHref)
{
nsLinkState defaultState;
// The default state for links with an href is unvisited.
if (aHasHref) {
defaultState = eLinkState_Unvisited;
} else {
defaultState = eLinkState_NotLink;
}
// If !mNeedsRegstration, then either we've never registered, or we're
// currently registered; in either case, we should remove ourself
// from the doc and the history.
if (!mNeedsRegistration && mLinkState != eLinkState_NotLink) {
nsIDocument *doc = mElement->GetCurrentDoc();
if (doc && (mRegistered || mLinkState == eLinkState_Visited)) {
// Tell the document to forget about this link if we've registered
// with it before.
doc->ForgetLink(this);
}
UnregisterFromHistory();
}
// If we have an href, we should register with the history.
mNeedsRegistration = aHasHref;
// If we've cached the URI, reset always invalidates it.
mCachedURI = nullptr;
if (mSearchParams) {
mSearchParams->Invalidate();
}
// Update our state back to the default.
mLinkState = defaultState;
// We have to be very careful here: if aNotify is false we do NOT
// want to call UpdateState, because that will call into LinkState()
// and try to start off loads, etc. But ResetLinkState is called
// with aNotify false when things are in inconsistent states, so
// we'll get confused in that situation. Instead, just silently
// update the link state on mElement. Since we might have set the
// link state to unvisited, make sure to update with that state if
// required.
if (aNotify) {
mElement->UpdateState(aNotify);
} else {
if (mLinkState == eLinkState_Unvisited) {
mElement->UpdateLinkState(NS_EVENT_STATE_UNVISITED);
} else {
mElement->UpdateLinkState(nsEventStates());
}
}
}
static nsIFrame*
GetClosest(nsIFrame* aRoot, const nsPoint& aPointRelativeToRootFrame,
const nsRect& aTargetRect, const EventRadiusPrefs* aPrefs,
nsIFrame* aRestrictToDescendants, nsTArray<nsIFrame*>& aCandidates)
{
nsIFrame* bestTarget = nullptr;
// Lower is better; distance is in appunits
float bestDistance = 1e6f;
nsRegion exposedRegion(aTargetRect);
for (uint32_t i = 0; i < aCandidates.Length(); ++i) {
nsIFrame* f = aCandidates[i];
bool preservesAxisAlignedRectangles = false;
nsRect borderBox = nsLayoutUtils::TransformFrameRectToAncestor(f,
nsRect(nsPoint(0, 0), f->GetSize()), aRoot, &preservesAxisAlignedRectangles);
nsRegion region;
region.And(exposedRegion, borderBox);
if (region.IsEmpty()) {
continue;
}
if (preservesAxisAlignedRectangles) {
// Subtract from the exposed region if we have a transform that won't make
// the bounds include a bunch of area that we don't actually cover.
SubtractFromExposedRegion(&exposedRegion, region);
}
if (!IsElementClickable(f)) {
continue;
}
// If our current closest frame is a descendant of 'f', skip 'f' (prefer
// the nested frame).
if (bestTarget && nsLayoutUtils::IsProperAncestorFrameCrossDoc(f, bestTarget, aRoot)) {
continue;
}
if (!nsLayoutUtils::IsAncestorFrameCrossDoc(aRestrictToDescendants, f, aRoot)) {
continue;
}
// distance is in appunits
float distance = ComputeDistanceFromRegion(aPointRelativeToRootFrame, region);
nsIContent* content = f->GetContent();
if (content && content->IsElement() &&
content->AsElement()->State().HasState(nsEventStates(NS_EVENT_STATE_VISITED))) {
distance *= aPrefs->mVisitedWeight / 100.0f;
}
if (distance < bestDistance) {
bestDistance = distance;
bestTarget = f;
}
}
return bestTarget;
}
NS_IMETHODIMP
inDOMUtils::SetContentState(nsIDOMElement *aElement, nsEventStates::InternalType aState)
{
NS_ENSURE_ARG_POINTER(aElement);
nsCOMPtr<nsIEventStateManager> esm = inLayoutUtils::GetEventStateManagerFor(aElement);
if (esm) {
nsCOMPtr<nsIContent> content;
content = do_QueryInterface(aElement);
return esm->SetContentState(content, nsEventStates(aState));
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
inDOMUtils::SetContentState(nsIDOMElement *aElement, nsEventStates::InternalType aState)
{
NS_ENSURE_ARG_POINTER(aElement);
nsRefPtr<nsEventStateManager> esm = inLayoutUtils::GetEventStateManagerFor(aElement);
if (esm) {
nsCOMPtr<nsIContent> content;
content = do_QueryInterface(aElement);
// XXX Invalid cast of bool to nsresult (bug 778108)
return (nsresult)esm->SetContentState(content, nsEventStates(aState));
}
return NS_ERROR_FAILURE;
}
nsEventStates
Link::LinkState() const
{
// We are a constant method, but we are just lazily doing things and have to
// track that state. Cast away that constness!
Link *self = const_cast<Link *>(this);
Element *element = self->mElement;
// If we have not yet registered for notifications and need to,
// due to our href changing, register now!
if (!mRegistered && mNeedsRegistration && element->IsInDoc()) {
// Only try and register once.
self->mNeedsRegistration = false;
nsCOMPtr<nsIURI> hrefURI(GetURI());
// Assume that we are not visited until we are told otherwise.
self->mLinkState = eLinkState_Unvisited;
// Make sure the href attribute has a valid link (bug 23209).
// If we have a good href, register with History if available.
if (mHistory && hrefURI) {
nsresult rv = mHistory->RegisterVisitedCallback(hrefURI, self);
if (NS_SUCCEEDED(rv)) {
self->mRegistered = true;
// And make sure we are in the document's link map.
element->GetCurrentDoc()->AddStyleRelevantLink(self);
}
}
}
// Otherwise, return our known state.
if (mLinkState == eLinkState_Visited) {
return NS_EVENT_STATE_VISITED;
}
if (mLinkState == eLinkState_Unvisited) {
return NS_EVENT_STATE_UNVISITED;
}
return nsEventStates();
}
void
Link::ResetLinkState(bool aNotify)
{
// If we are in our default state, bail early.
if (mLinkState == defaultState) {
return;
}
Element *element = mElement;
// Tell the document to forget about this link if we were a link before.
nsIDocument *doc = element->GetCurrentDoc();
if (doc && mLinkState != eLinkState_NotLink) {
doc->ForgetLink(this);
}
UnregisterFromHistory();
// Update our state back to the default.
mLinkState = defaultState;
// Get rid of our cached URI.
mCachedURI = nullptr;
// We have to be very careful here: if aNotify is false we do NOT
// want to call UpdateState, because that will call into LinkState()
// and try to start off loads, etc. But ResetLinkState is called
// with aNotify false when things are in inconsistent states, so
// we'll get confused in that situation. Instead, just silently
// update the link state on mElement.
if (aNotify) {
mElement->UpdateState(aNotify);
} else {
mElement->UpdateLinkState(nsEventStates());
}
}
nsEventStates
nsMathMLElement::IntrinsicState() const
{
return nsMathMLElementBase::IntrinsicState() |
(mIncrementScriptLevel ? NS_EVENT_STATE_INCREMENT_SCRIPT_LEVEL : nsEventStates());
}
