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gecko-dev/layout/inspector/inDOMUtils.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 "mozilla/ArrayUtils.h"
#include "inDOMUtils.h"
#include "inLayoutUtils.h"
#include "nsIServiceManager.h"
#include "nsISupportsArray.h"
#include "nsString.h"
#include "nsIDOMElement.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIDOMDocument.h"
#include "nsIDOMCharacterData.h"
#include "nsRuleNode.h"
#include "nsIStyleRule.h"
#include "mozilla/css/StyleRule.h"
#include "nsICSSStyleRuleDOMWrapper.h"
#include "nsIDOMWindow.h"
#include "nsXBLBinding.h"
#include "nsXBLPrototypeBinding.h"
#include "nsIMutableArray.h"
#include "nsBindingManager.h"
#include "ChildIterator.h"
#include "nsComputedDOMStyle.h"
#include "nsEventStateManager.h"
#include "nsIAtom.h"
#include "nsRange.h"
#include "nsContentList.h"
#include "mozilla/dom/Element.h"
#include "nsCSSStyleSheet.h"
#include "nsRuleWalker.h"
#include "nsRuleProcessorData.h"
#include "nsCSSRuleProcessor.h"
#include "mozilla/dom/InspectorUtilsBinding.h"
#include "nsCSSProps.h"
#include "nsColor.h"
#include "nsStyleSet.h"
using namespace mozilla;
using namespace mozilla::css;
using namespace mozilla::dom;
///////////////////////////////////////////////////////////////////////////////
inDOMUtils::inDOMUtils()
{
}
inDOMUtils::~inDOMUtils()
{
}
NS_IMPL_ISUPPORTS1(inDOMUtils, inIDOMUtils)
///////////////////////////////////////////////////////////////////////////////
// inIDOMUtils
NS_IMETHODIMP
inDOMUtils::GetAllStyleSheets(nsIDOMDocument *aDocument, uint32_t *aLength,
nsISupports ***aSheets)
{
NS_ENSURE_ARG_POINTER(aDocument);
nsCOMArray<nsISupports> sheets;
nsCOMPtr<nsIDocument> document = do_QueryInterface(aDocument);
MOZ_ASSERT(document);
// Get the agent, then user sheets in the style set.
nsIPresShell* presShell = document->GetShell();
if (presShell) {
nsStyleSet* styleSet = presShell->StyleSet();
nsStyleSet::sheetType sheetType = nsStyleSet::eAgentSheet;
for (int32_t i = 0; i < styleSet->SheetCount(sheetType); i++) {
sheets.AppendElement(styleSet->StyleSheetAt(sheetType, i));
}
sheetType = nsStyleSet::eUserSheet;
for (int32_t i = 0; i < styleSet->SheetCount(sheetType); i++) {
sheets.AppendElement(styleSet->StyleSheetAt(sheetType, i));
}
}
// Get the document sheets.
for (int32_t i = 0; i < document->GetNumberOfStyleSheets(); i++) {
sheets.AppendElement(document->GetStyleSheetAt(i));
}
nsISupports** ret = static_cast<nsISupports**>(NS_Alloc(sheets.Count() *
sizeof(nsISupports*)));
for (int32_t i = 0; i < sheets.Count(); i++) {
NS_ADDREF(ret[i] = sheets[i]);
}
*aLength = sheets.Count();
*aSheets = ret;
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::IsIgnorableWhitespace(nsIDOMCharacterData *aDataNode,
bool *aReturn)
{
NS_PRECONDITION(aReturn, "Must have an out parameter");
NS_ENSURE_ARG_POINTER(aDataNode);
*aReturn = false;
nsCOMPtr<nsIContent> content = do_QueryInterface(aDataNode);
NS_ASSERTION(content, "Does not implement nsIContent!");
if (!content->TextIsOnlyWhitespace()) {
return NS_OK;
}
// Okay. We have only white space. Let's check the white-space
// property now and make sure that this isn't preformatted text...
nsIFrame* frame = content->GetPrimaryFrame();
if (frame) {
const nsStyleText* text = frame->StyleText();
*aReturn = !text->WhiteSpaceIsSignificant();
}
else {
// empty inter-tag text node without frame, e.g., in between <table>\n<tr>
*aReturn = true;
}
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetParentForNode(nsIDOMNode* aNode,
bool aShowingAnonymousContent,
nsIDOMNode** aParent)
{
NS_ENSURE_ARG_POINTER(aNode);
// First do the special cases -- document nodes and anonymous content
nsCOMPtr<nsIDocument> doc(do_QueryInterface(aNode));
nsCOMPtr<nsIDOMNode> parent;
if (doc) {
parent = inLayoutUtils::GetContainerFor(*doc);
} else if (aShowingAnonymousContent) {
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (content) {
nsIContent* bparent = content->GetXBLInsertionParent();
parent = do_QueryInterface(bparent);
}
}
if (!parent) {
// Ok, just get the normal DOM parent node
aNode->GetParentNode(getter_AddRefs(parent));
}
NS_IF_ADDREF(*aParent = parent);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetChildrenForNode(nsIDOMNode* aNode,
bool aShowingAnonymousContent,
nsIDOMNodeList** aChildren)
{
NS_ENSURE_ARG_POINTER(aNode);
NS_PRECONDITION(aChildren, "Must have an out parameter");
nsCOMPtr<nsIDOMNodeList> kids;
if (aShowingAnonymousContent) {
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (content) {
kids = content->GetChildren(nsIContent::eAllChildren);
}
}
if (!kids) {
aNode->GetChildNodes(getter_AddRefs(kids));
}
kids.forget(aChildren);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetCSSStyleRules(nsIDOMElement *aElement,
const nsAString& aPseudo,
nsISupportsArray **_retval)
{
NS_ENSURE_ARG_POINTER(aElement);
*_retval = nullptr;
nsCOMPtr<nsIAtom> pseudoElt;
if (!aPseudo.IsEmpty()) {
pseudoElt = do_GetAtom(aPseudo);
}
nsRuleNode* ruleNode = nullptr;
nsCOMPtr<Element> element = do_QueryInterface(aElement);
NS_ENSURE_STATE(element);
nsRefPtr<nsStyleContext> styleContext;
GetRuleNodeForElement(element, pseudoElt, getter_AddRefs(styleContext), &ruleNode);
if (!ruleNode) {
// This can fail for elements that are not in the document or
// if the document they're in doesn't have a presshell. Bail out.
return NS_OK;
}
nsCOMPtr<nsISupportsArray> rules;
NS_NewISupportsArray(getter_AddRefs(rules));
if (!rules) return NS_ERROR_OUT_OF_MEMORY;
nsRefPtr<mozilla::css::StyleRule> cssRule;
for ( ; !ruleNode->IsRoot(); ruleNode = ruleNode->GetParent()) {
cssRule = do_QueryObject(ruleNode->GetRule());
if (cssRule) {
nsCOMPtr<nsIDOMCSSRule> domRule = cssRule->GetDOMRule();
if (domRule)
rules->InsertElementAt(domRule, 0);
}
}
*_retval = rules;
NS_ADDREF(*_retval);
return NS_OK;
}
static already_AddRefed<StyleRule>
GetRuleFromDOMRule(nsIDOMCSSStyleRule *aRule, ErrorResult& rv)
{
nsCOMPtr<nsICSSStyleRuleDOMWrapper> rule = do_QueryInterface(aRule);
if (!rule) {
rv.Throw(NS_ERROR_INVALID_POINTER);
return nullptr;
}
nsRefPtr<StyleRule> cssrule;
rv = rule->GetCSSStyleRule(getter_AddRefs(cssrule));
if (rv.Failed()) {
return nullptr;
}
if (!cssrule) {
rv.Throw(NS_ERROR_FAILURE);
}
return cssrule.forget();
}
NS_IMETHODIMP
inDOMUtils::GetRuleLine(nsIDOMCSSStyleRule *aRule, uint32_t *_retval)
{
ErrorResult rv;
nsRefPtr<StyleRule> rule = GetRuleFromDOMRule(aRule, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
*_retval = rule->GetLineNumber();
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetRuleColumn(nsIDOMCSSStyleRule *aRule, uint32_t *_retval)
{
ErrorResult rv;
nsRefPtr<StyleRule> rule = GetRuleFromDOMRule(aRule, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
*_retval = rule->GetColumnNumber();
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetSelectorCount(nsIDOMCSSStyleRule* aRule, uint32_t *aCount)
{
ErrorResult rv;
nsRefPtr<StyleRule> rule = GetRuleFromDOMRule(aRule, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
uint32_t count = 0;
for (nsCSSSelectorList* sel = rule->Selector(); sel; sel = sel->mNext) {
++count;
}
*aCount = count;
return NS_OK;
}
static nsCSSSelectorList*
GetSelectorAtIndex(nsIDOMCSSStyleRule* aRule, uint32_t aIndex, ErrorResult& rv)
{
nsRefPtr<StyleRule> rule = GetRuleFromDOMRule(aRule, rv);
if (rv.Failed()) {
return nullptr;
}
for (nsCSSSelectorList* sel = rule->Selector(); sel;
sel = sel->mNext, --aIndex) {
if (aIndex == 0) {
return sel;
}
}
// Ran out of selectors
rv.Throw(NS_ERROR_INVALID_ARG);
return nullptr;
}
NS_IMETHODIMP
inDOMUtils::GetSelectorText(nsIDOMCSSStyleRule* aRule,
uint32_t aSelectorIndex,
nsAString& aText)
{
ErrorResult rv;
nsCSSSelectorList* sel = GetSelectorAtIndex(aRule, aSelectorIndex, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
nsRefPtr<StyleRule> rule = GetRuleFromDOMRule(aRule, rv);
MOZ_ASSERT(!rv.Failed(), "How could we get a selector but not a rule?");
sel->mSelectors->ToString(aText, rule->GetStyleSheet(), false);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetSpecificity(nsIDOMCSSStyleRule* aRule,
uint32_t aSelectorIndex,
uint64_t* aSpecificity)
{
ErrorResult rv;
nsCSSSelectorList* sel = GetSelectorAtIndex(aRule, aSelectorIndex, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
*aSpecificity = sel->mWeight;
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::SelectorMatchesElement(nsIDOMElement* aElement,
nsIDOMCSSStyleRule* aRule,
uint32_t aSelectorIndex,
bool* aMatches)
{
nsCOMPtr<Element> element = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(element);
ErrorResult rv;
nsCSSSelectorList* tail = GetSelectorAtIndex(aRule, aSelectorIndex, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
// We want just the one list item, not the whole list tail
nsAutoPtr<nsCSSSelectorList> sel(tail->Clone(false));
element->OwnerDoc()->FlushPendingLinkUpdates();
// XXXbz what exactly should we do with visited state here?
TreeMatchContext matchingContext(false,
nsRuleWalker::eRelevantLinkUnvisited,
element->OwnerDoc(),
TreeMatchContext::eNeverMatchVisited);
*aMatches = nsCSSRuleProcessor::SelectorListMatches(element, matchingContext,
sel);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::IsInheritedProperty(const nsAString &aPropertyName, bool *_retval)
{
nsCSSProperty prop =
nsCSSProps::LookupProperty(aPropertyName, nsCSSProps::eIgnoreEnabledState);
if (prop == eCSSProperty_UNKNOWN) {
*_retval = false;
return NS_OK;
}
if (prop == eCSSPropertyExtra_variable) {
*_retval = true;
return NS_OK;
}
if (nsCSSProps::IsShorthand(prop)) {
prop = nsCSSProps::SubpropertyEntryFor(prop)[0];
}
nsStyleStructID sid = nsCSSProps::kSIDTable[prop];
*_retval = !nsCachedStyleData::IsReset(sid);
return NS_OK;
}
extern const char* const kCSSRawProperties[];
NS_IMETHODIMP
inDOMUtils::GetCSSPropertyNames(uint32_t aFlags, uint32_t* aCount,
char16_t*** aProps)
{
// maxCount is the largest number of properties we could have; our actual
// number might be smaller because properties might be disabled.
uint32_t maxCount;
if (aFlags & EXCLUDE_SHORTHANDS) {
maxCount = eCSSProperty_COUNT_no_shorthands;
} else {
maxCount = eCSSProperty_COUNT;
}
if (aFlags & INCLUDE_ALIASES) {
maxCount += (eCSSProperty_COUNT_with_aliases - eCSSProperty_COUNT);
}
char16_t** props =
static_cast<char16_t**>(nsMemory::Alloc(maxCount * sizeof(char16_t*)));
#define DO_PROP(_prop) \
PR_BEGIN_MACRO \
nsCSSProperty cssProp = nsCSSProperty(_prop); \
if (nsCSSProps::IsEnabled(cssProp)) { \
props[propCount] = \
ToNewUnicode(nsDependentCString(kCSSRawProperties[_prop])); \
++propCount; \
} \
PR_END_MACRO
// prop is the property id we're considering; propCount is how many properties
// we've put into props so far.
uint32_t prop = 0, propCount = 0;
for ( ; prop < eCSSProperty_COUNT_no_shorthands; ++prop) {
if (nsCSSProps::PropertyParseType(nsCSSProperty(prop)) !=
CSS_PROPERTY_PARSE_INACCESSIBLE) {
DO_PROP(prop);
}
}
if (!(aFlags & EXCLUDE_SHORTHANDS)) {
for ( ; prop < eCSSProperty_COUNT; ++prop) {
// Some shorthands are also aliases
if ((aFlags & INCLUDE_ALIASES) ||
!nsCSSProps::PropHasFlags(nsCSSProperty(prop),
CSS_PROPERTY_IS_ALIAS)) {
DO_PROP(prop);
}
}
}
if (aFlags & INCLUDE_ALIASES) {
for (prop = eCSSProperty_COUNT; prop < eCSSProperty_COUNT_with_aliases; ++prop) {
DO_PROP(prop);
}
}
#undef DO_PROP
*aCount = propCount;
*aProps = props;
return NS_OK;
}
static void InsertNoDuplicates(nsTArray<nsString>& aArray,
const nsAString& aString)
{
size_t i = aArray.IndexOfFirstElementGt(aString);
if (i > 0 && aArray[i-1].Equals(aString)) {
return;
}
aArray.InsertElementAt(i, aString);
}
static void GetKeywordsForProperty(const nsCSSProperty aProperty,
nsTArray<nsString>& aArray)
{
if (nsCSSProps::IsShorthand(aProperty)) {
// Shorthand props have no keywords.
return;
}
const nsCSSProps::KTableValue *keywordTable =
nsCSSProps::kKeywordTableTable[aProperty];
if (keywordTable && keywordTable != nsCSSProps::kBoxPropSourceKTable) {
size_t i = 0;
while (nsCSSKeyword(keywordTable[i]) != eCSSKeyword_UNKNOWN) {
nsCSSKeyword word = nsCSSKeyword(keywordTable[i]);
InsertNoDuplicates(aArray,
NS_ConvertASCIItoUTF16(nsCSSKeywords::GetStringValue(word)));
// Increment counter by 2, because in this table every second
// element is a nsCSSKeyword.
i += 2;
}
}
}
static void GetColorsForProperty(const uint32_t aParserVariant,
nsTArray<nsString>& aArray)
{
if (aParserVariant & VARIANT_COLOR) {
// GetKeywordsForProperty and GetOtherValuesForProperty assume aArray is sorted,
// and if aArray is not empty here, then it's not going to be sorted coming out.
MOZ_ASSERT(aArray.Length() == 0);
size_t size;
const char * const *allColorNames = NS_AllColorNames(&size);
for (size_t i = 0; i < size; i++) {
CopyASCIItoUTF16(allColorNames[i], *aArray.AppendElement());
}
}
return;
}
static void GetOtherValuesForProperty(const uint32_t aParserVariant,
nsTArray<nsString>& aArray)
{
if (aParserVariant & VARIANT_AUTO) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("auto"));
}
if (aParserVariant & VARIANT_NORMAL) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("normal"));
}
if(aParserVariant & VARIANT_ALL) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("all"));
}
if (aParserVariant & VARIANT_NONE) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("none"));
}
if (aParserVariant & VARIANT_ELEMENT) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("-moz-element"));
}
if (aParserVariant & VARIANT_IMAGE_RECT) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("-moz-image-rect"));
}
if (aParserVariant & VARIANT_COLOR) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("rgb"));
InsertNoDuplicates(aArray, NS_LITERAL_STRING("hsl"));
InsertNoDuplicates(aArray, NS_LITERAL_STRING("rgba"));
InsertNoDuplicates(aArray, NS_LITERAL_STRING("hsla"));
}
if (aParserVariant & VARIANT_TIMING_FUNCTION) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("cubic-bezier"));
InsertNoDuplicates(aArray, NS_LITERAL_STRING("steps"));
}
if (aParserVariant & VARIANT_CALC) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("calc"));
InsertNoDuplicates(aArray, NS_LITERAL_STRING("-moz-calc"));
}
if (aParserVariant & VARIANT_URL) {
InsertNoDuplicates(aArray, NS_LITERAL_STRING("url"));
}
}
NS_IMETHODIMP
inDOMUtils::GetCSSValuesForProperty(const nsAString& aProperty,
uint32_t* aLength,
char16_t*** aValues)
{
nsCSSProperty propertyID = nsCSSProps::LookupProperty(aProperty,
nsCSSProps::eEnabledForAllContent);
if (propertyID == eCSSProperty_UNKNOWN) {
return NS_ERROR_FAILURE;
}
nsTArray<nsString> array;
// We start collecting the values, BUT colors need to go in first, because array
// needs to stay sorted, and the colors are sorted, so we just append them.
if (propertyID == eCSSPropertyExtra_variable) {
// No other values we can report.
} else if (!nsCSSProps::IsShorthand(propertyID)) {
// Property is longhand.
uint32_t propertyParserVariant = nsCSSProps::ParserVariant(propertyID);
// Get colors first.
GetColorsForProperty(propertyParserVariant, array);
if (propertyParserVariant & VARIANT_KEYWORD) {
GetKeywordsForProperty(propertyID, array);
}
GetOtherValuesForProperty(propertyParserVariant, array);
} else {
// Property is shorthand.
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(subproperty, propertyID) {
// Get colors (once) first.
uint32_t propertyParserVariant = nsCSSProps::ParserVariant(*subproperty);
if (propertyParserVariant & VARIANT_COLOR) {
GetColorsForProperty(propertyParserVariant, array);
break;
}
}
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(subproperty, propertyID) {
uint32_t propertyParserVariant = nsCSSProps::ParserVariant(*subproperty);
if (propertyParserVariant & VARIANT_KEYWORD) {
GetKeywordsForProperty(*subproperty, array);
}
GetOtherValuesForProperty(propertyParserVariant, array);
}
}
// All CSS properties take initial, inherit and unset.
InsertNoDuplicates(array, NS_LITERAL_STRING("initial"));
InsertNoDuplicates(array, NS_LITERAL_STRING("inherit"));
InsertNoDuplicates(array, NS_LITERAL_STRING("unset"));
*aLength = array.Length();
char16_t** ret =
static_cast<char16_t**>(NS_Alloc(*aLength * sizeof(char16_t*)));
for (uint32_t i = 0; i < *aLength; ++i) {
ret[i] = ToNewUnicode(array[i]);
}
*aValues = ret;
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::ColorNameToRGB(const nsAString& aColorName, JSContext* aCx,
JS::MutableHandle<JS::Value> aValue)
{
nscolor color;
if (!NS_ColorNameToRGB(aColorName, &color)) {
return NS_ERROR_INVALID_ARG;
}
InspectorRGBTriple triple;
triple.mR = NS_GET_R(color);
triple.mG = NS_GET_G(color);
triple.mB = NS_GET_B(color);
if (!triple.ToObject(aCx, JS::NullPtr(), aValue)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::RgbToColorName(uint8_t aR, uint8_t aG, uint8_t aB,
nsAString& aColorName)
{
const char* color = NS_RGBToColorName(NS_RGB(aR, aG, aB));
if (!color) {
aColorName.Truncate();
return NS_ERROR_INVALID_ARG;
}
aColorName.AssignASCII(color);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetBindingURLs(nsIDOMElement *aElement, nsIArray **_retval)
{
NS_ENSURE_ARG_POINTER(aElement);
*_retval = nullptr;
nsCOMPtr<nsIMutableArray> urls = do_CreateInstance(NS_ARRAY_CONTRACTID);
if (!urls)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIContent> content = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(content);
nsXBLBinding *binding = content->GetXBLBinding();
while (binding) {
urls->AppendElement(binding->PrototypeBinding()->BindingURI(), false);
binding = binding->GetBaseBinding();
}
NS_ADDREF(*_retval = urls);
return NS_OK;
}
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;
}
NS_IMETHODIMP
inDOMUtils::GetContentState(nsIDOMElement *aElement, nsEventStates::InternalType* aState)
{
*aState = 0;
nsCOMPtr<nsIContent> content = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(content);
// NOTE: if this method is removed,
// please remove GetInternalValue from nsEventStates
*aState = content->AsElement()->State().GetInternalValue();
return NS_OK;
}
/* static */ nsresult
inDOMUtils::GetRuleNodeForElement(dom::Element* aElement,
nsIAtom* aPseudo,
nsStyleContext** aStyleContext,
nsRuleNode** aRuleNode)
{
MOZ_ASSERT(aElement);
*aRuleNode = nullptr;
*aStyleContext = nullptr;
nsIDocument* doc = aElement->GetDocument();
NS_ENSURE_TRUE(doc, NS_ERROR_UNEXPECTED);
nsIPresShell *presShell = doc->GetShell();
NS_ENSURE_TRUE(presShell, NS_ERROR_UNEXPECTED);
nsPresContext *presContext = presShell->GetPresContext();
NS_ENSURE_TRUE(presContext, NS_ERROR_UNEXPECTED);
presContext->EnsureSafeToHandOutCSSRules();
nsRefPtr<nsStyleContext> sContext =
nsComputedDOMStyle::GetStyleContextForElement(aElement, aPseudo, presShell);
if (sContext) {
*aRuleNode = sContext->RuleNode();
sContext.forget(aStyleContext);
}
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::GetUsedFontFaces(nsIDOMRange* aRange,
nsIDOMFontFaceList** aFontFaceList)
{
return static_cast<nsRange*>(aRange)->GetUsedFontFaces(aFontFaceList);
}
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, _pref) \
nsEventStates(),
#define CSS_STATE_PSEUDO_CLASS(_name, _value, _pref, _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()
};
static_assert(MOZ_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)];
}
NS_IMETHODIMP
inDOMUtils::AddPseudoClassLock(nsIDOMElement *aElement,
const nsAString &aPseudoClass)
{
nsEventStates state = GetStatesForPseudoClass(aPseudoClass);
if (state.IsEmpty()) {
return NS_OK;
}
nsCOMPtr<mozilla::dom::Element> element = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(element);
element->LockStyleStates(state);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::RemovePseudoClassLock(nsIDOMElement *aElement,
const nsAString &aPseudoClass)
{
nsEventStates state = GetStatesForPseudoClass(aPseudoClass);
if (state.IsEmpty()) {
return NS_OK;
}
nsCOMPtr<mozilla::dom::Element> element = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(element);
element->UnlockStyleStates(state);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::HasPseudoClassLock(nsIDOMElement *aElement,
const nsAString &aPseudoClass,
bool *_retval)
{
nsEventStates state = GetStatesForPseudoClass(aPseudoClass);
if (state.IsEmpty()) {
*_retval = false;
return NS_OK;
}
nsCOMPtr<mozilla::dom::Element> element = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(element);
nsEventStates locks = element->LockedStyleStates();
*_retval = locks.HasAllStates(state);
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::ClearPseudoClassLocks(nsIDOMElement *aElement)
{
nsCOMPtr<mozilla::dom::Element> element = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(element);
element->ClearStyleStateLocks();
return NS_OK;
}
NS_IMETHODIMP
inDOMUtils::ParseStyleSheet(nsIDOMCSSStyleSheet *aSheet,
const nsAString& aInput)
{
nsRefPtr<nsCSSStyleSheet> sheet = do_QueryObject(aSheet);
NS_ENSURE_ARG_POINTER(sheet);
return sheet->ParseSheet(aInput);
}
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