зеркало из https://github.com/mozilla/gecko-dev.git
398 строки
13 KiB
C++
398 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* base class for DOM objects for element.style and cssStyleRule.style */
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#include "nsDOMCSSDeclaration.h"
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#include "mozilla/DeclarationBlock.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/css/Rule.h"
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#include "mozilla/dom/CSS2PropertiesBinding.h"
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#include "mozilla/dom/MutationEventBinding.h"
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#include "nsCSSProps.h"
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#include "nsCOMPtr.h"
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#include "mozAutoDocUpdate.h"
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#include "nsIURI.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "nsQueryObject.h"
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#include "mozilla/layers/ScrollLinkedEffectDetector.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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nsDOMCSSDeclaration::~nsDOMCSSDeclaration() = default;
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/* virtual */
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JSObject* nsDOMCSSDeclaration::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return CSS2Properties_Binding::Wrap(aCx, this, aGivenProto);
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}
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NS_IMPL_QUERY_INTERFACE(nsDOMCSSDeclaration, nsICSSDeclaration)
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nsresult nsDOMCSSDeclaration::GetPropertyValue(const nsCSSPropertyID aPropID,
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nsAString& aValue) {
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MOZ_ASSERT(aPropID != eCSSProperty_UNKNOWN,
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"Should never pass eCSSProperty_UNKNOWN around");
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aValue.Truncate();
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if (DeclarationBlock* decl =
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GetOrCreateCSSDeclaration(eOperation_Read, nullptr)) {
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decl->GetPropertyValueByID(aPropID, aValue);
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}
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return NS_OK;
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}
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nsresult nsDOMCSSDeclaration::SetPropertyValue(
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const nsCSSPropertyID aPropID, const nsAString& aValue,
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nsIPrincipal* aSubjectPrincipal) {
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if (IsReadOnly()) {
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return NS_OK;
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}
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switch (aPropID) {
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case eCSSProperty_background_position:
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case eCSSProperty_background_position_x:
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case eCSSProperty_background_position_y:
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case eCSSProperty_transform:
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case eCSSProperty_translate:
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case eCSSProperty_rotate:
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case eCSSProperty_scale:
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case eCSSProperty_top:
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case eCSSProperty_left:
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case eCSSProperty_bottom:
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case eCSSProperty_right:
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case eCSSProperty_margin:
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case eCSSProperty_margin_top:
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case eCSSProperty_margin_left:
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case eCSSProperty_margin_bottom:
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case eCSSProperty_margin_right:
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case eCSSProperty_margin_inline_start:
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case eCSSProperty_margin_inline_end:
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case eCSSProperty_margin_block_start:
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case eCSSProperty_margin_block_end:
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mozilla::layers::ScrollLinkedEffectDetector::PositioningPropertyMutated();
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break;
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default:
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break;
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}
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if (aValue.IsEmpty()) {
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// If the new value of the property is an empty string we remove the
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// property.
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return RemovePropertyInternal(aPropID);
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}
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return ParsePropertyValue(aPropID, aValue, false, aSubjectPrincipal);
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}
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void nsDOMCSSDeclaration::GetCssText(nsAString& aCssText) {
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DeclarationBlock* decl = GetOrCreateCSSDeclaration(eOperation_Read, nullptr);
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aCssText.Truncate();
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if (decl) {
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decl->ToString(aCssText);
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}
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}
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void nsDOMCSSDeclaration::SetCssText(const nsAString& aCssText,
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nsIPrincipal* aSubjectPrincipal,
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ErrorResult& aRv) {
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if (IsReadOnly()) {
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return;
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}
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// We don't need to *do* anything with the old declaration, but we need
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// to ensure that it exists, or else SetCSSDeclaration may crash.
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RefPtr<DeclarationBlock> created;
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DeclarationBlock* olddecl =
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GetOrCreateCSSDeclaration(eOperation_Modify, getter_AddRefs(created));
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if (!olddecl) {
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aRv.Throw(NS_ERROR_NOT_AVAILABLE);
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return;
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}
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// For nsDOMCSSAttributeDeclaration, SetCSSDeclaration will lead to
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// Attribute setting code, which leads in turn to BeginUpdate. We
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// need to start the update now so that the old rule doesn't get used
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// between when we mutate the declaration and when we set the new
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// rule (see stack in bug 209575).
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mozAutoDocUpdate autoUpdate(DocToUpdate(), true);
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DeclarationBlockMutationClosure closure = {};
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MutationClosureData closureData;
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GetPropertyChangeClosure(&closure, &closureData);
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ParsingEnvironment servoEnv = GetParsingEnvironment(aSubjectPrincipal);
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if (!servoEnv.mUrlExtraData) {
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aRv.Throw(NS_ERROR_NOT_AVAILABLE);
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return;
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}
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// Need to special case closure calling here, since parsing css text
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// doesn't modify any existing declaration and that is why the callback isn't
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// called implicitly.
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if (closureData.mClosure) {
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closureData.mClosure(&closureData);
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}
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RefPtr<DeclarationBlock> newdecl = DeclarationBlock::FromCssText(
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aCssText, servoEnv.mUrlExtraData, servoEnv.mCompatMode, servoEnv.mLoader);
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aRv = SetCSSDeclaration(newdecl, &closureData);
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}
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uint32_t nsDOMCSSDeclaration::Length() {
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DeclarationBlock* decl = GetOrCreateCSSDeclaration(eOperation_Read, nullptr);
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if (decl) {
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return decl->Count();
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}
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return 0;
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}
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void nsDOMCSSDeclaration::IndexedGetter(uint32_t aIndex, bool& aFound,
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nsAString& aPropName) {
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DeclarationBlock* decl = GetOrCreateCSSDeclaration(eOperation_Read, nullptr);
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aFound = decl && decl->GetNthProperty(aIndex, aPropName);
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}
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NS_IMETHODIMP
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nsDOMCSSDeclaration::GetPropertyValue(const nsAString& aPropertyName,
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nsAString& aReturn) {
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aReturn.Truncate();
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if (DeclarationBlock* decl =
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GetOrCreateCSSDeclaration(eOperation_Read, nullptr)) {
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decl->GetPropertyValue(aPropertyName, aReturn);
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}
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return NS_OK;
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}
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void nsDOMCSSDeclaration::GetPropertyPriority(const nsAString& aPropertyName,
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nsAString& aPriority) {
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DeclarationBlock* decl = GetOrCreateCSSDeclaration(eOperation_Read, nullptr);
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aPriority.Truncate();
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if (decl && decl->GetPropertyIsImportant(aPropertyName)) {
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aPriority.AssignLiteral("important");
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}
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}
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NS_IMETHODIMP
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nsDOMCSSDeclaration::SetProperty(const nsAString& aPropertyName,
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const nsAString& aValue,
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const nsAString& aPriority,
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nsIPrincipal* aSubjectPrincipal) {
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if (IsReadOnly()) {
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return NS_OK;
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}
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if (aValue.IsEmpty()) {
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// If the new value of the property is an empty string we remove the
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// property.
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// XXX this ignores the priority string, should it?
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return RemovePropertyInternal(aPropertyName);
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}
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// In the common (and fast) cases we can use the property id
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nsCSSPropertyID propID = nsCSSProps::LookupProperty(aPropertyName);
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if (propID == eCSSProperty_UNKNOWN) {
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return NS_OK;
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}
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bool important;
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if (aPriority.IsEmpty()) {
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important = false;
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} else if (aPriority.LowerCaseEqualsASCII("important")) {
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important = true;
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} else {
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// XXX silent failure?
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return NS_OK;
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}
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if (propID == eCSSPropertyExtra_variable) {
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return ParseCustomPropertyValue(aPropertyName, aValue, important,
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aSubjectPrincipal);
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}
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return ParsePropertyValue(propID, aValue, important, aSubjectPrincipal);
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}
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NS_IMETHODIMP
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nsDOMCSSDeclaration::RemoveProperty(const nsAString& aPropertyName,
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nsAString& aReturn) {
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if (IsReadOnly()) {
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return NS_OK;
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}
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nsresult rv = GetPropertyValue(aPropertyName, aReturn);
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NS_ENSURE_SUCCESS(rv, rv);
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return RemovePropertyInternal(aPropertyName);
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}
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/* static */ nsDOMCSSDeclaration::ParsingEnvironment
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nsDOMCSSDeclaration::GetParsingEnvironmentForRule(const css::Rule* aRule) {
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StyleSheet* sheet = aRule ? aRule->GetStyleSheet() : nullptr;
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if (!sheet) {
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return {nullptr, eCompatibility_FullStandards, nullptr};
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}
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if (Document* document = sheet->GetAssociatedDocument()) {
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return {
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sheet->URLData(),
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document->GetCompatibilityMode(),
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document->CSSLoader(),
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};
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}
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return {
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sheet->URLData(),
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eCompatibility_FullStandards,
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nullptr,
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};
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}
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template <typename Func>
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nsresult nsDOMCSSDeclaration::ModifyDeclaration(
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nsIPrincipal* aSubjectPrincipal, MutationClosureData* aClosureData,
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Func aFunc) {
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RefPtr<DeclarationBlock> created;
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DeclarationBlock* olddecl =
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GetOrCreateCSSDeclaration(eOperation_Modify, getter_AddRefs(created));
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if (!olddecl) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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// For nsDOMCSSAttributeDeclaration, SetCSSDeclaration will lead to
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// Attribute setting code, which leads in turn to BeginUpdate. We
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// need to start the update now so that the old rule doesn't get used
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// between when we mutate the declaration and when we set the new
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// rule (see stack in bug 209575).
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mozAutoDocUpdate autoUpdate(DocToUpdate(), true);
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RefPtr<DeclarationBlock> decl = olddecl->EnsureMutable();
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bool changed;
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ParsingEnvironment servoEnv = GetParsingEnvironment(aSubjectPrincipal);
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if (!servoEnv.mUrlExtraData) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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changed = aFunc(decl, servoEnv);
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if (!changed) {
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// Parsing failed -- but we don't throw an exception for that.
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return NS_OK;
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}
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return SetCSSDeclaration(decl, aClosureData);
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}
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nsresult nsDOMCSSDeclaration::ParsePropertyValue(
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const nsCSSPropertyID aPropID, const nsAString& aPropValue,
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bool aIsImportant, nsIPrincipal* aSubjectPrincipal) {
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AUTO_PROFILER_LABEL_CATEGORY_PAIR(LAYOUT_CSSParsing);
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if (IsReadOnly()) {
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return NS_OK;
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}
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DeclarationBlockMutationClosure closure = {};
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MutationClosureData closureData;
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GetPropertyChangeClosure(&closure, &closureData);
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return ModifyDeclaration(
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aSubjectPrincipal, &closureData,
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[&](DeclarationBlock* decl, ParsingEnvironment& env) {
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NS_ConvertUTF16toUTF8 value(aPropValue);
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return Servo_DeclarationBlock_SetPropertyById(
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decl->Raw(), aPropID, &value, aIsImportant, env.mUrlExtraData,
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ParsingMode::Default, env.mCompatMode, env.mLoader, closure);
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});
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}
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nsresult nsDOMCSSDeclaration::ParseCustomPropertyValue(
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const nsAString& aPropertyName, const nsAString& aPropValue,
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bool aIsImportant, nsIPrincipal* aSubjectPrincipal) {
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MOZ_ASSERT(nsCSSProps::IsCustomPropertyName(aPropertyName));
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if (IsReadOnly()) {
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return NS_OK;
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}
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DeclarationBlockMutationClosure closure = {};
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MutationClosureData closureData;
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GetPropertyChangeClosure(&closure, &closureData);
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return ModifyDeclaration(
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aSubjectPrincipal, &closureData,
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[&](DeclarationBlock* decl, ParsingEnvironment& env) {
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NS_ConvertUTF16toUTF8 property(aPropertyName);
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NS_ConvertUTF16toUTF8 value(aPropValue);
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return Servo_DeclarationBlock_SetProperty(
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decl->Raw(), &property, &value, aIsImportant, env.mUrlExtraData,
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ParsingMode::Default, env.mCompatMode, env.mLoader, closure);
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});
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}
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nsresult nsDOMCSSDeclaration::RemovePropertyInternal(nsCSSPropertyID aPropID) {
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DeclarationBlock* olddecl =
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GetOrCreateCSSDeclaration(eOperation_RemoveProperty, nullptr);
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if (IsReadOnly()) {
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return NS_OK;
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}
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if (!olddecl) {
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return NS_OK; // no decl, so nothing to remove
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}
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// For nsDOMCSSAttributeDeclaration, SetCSSDeclaration will lead to
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// Attribute setting code, which leads in turn to BeginUpdate. We
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// need to start the update now so that the old rule doesn't get used
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// between when we mutate the declaration and when we set the new
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// rule (see stack in bug 209575).
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mozAutoDocUpdate autoUpdate(DocToUpdate(), true);
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DeclarationBlockMutationClosure closure = {};
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MutationClosureData closureData;
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GetPropertyChangeClosure(&closure, &closureData);
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RefPtr<DeclarationBlock> decl = olddecl->EnsureMutable();
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if (!decl->RemovePropertyByID(aPropID, closure)) {
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return NS_OK;
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}
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return SetCSSDeclaration(decl, &closureData);
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}
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nsresult nsDOMCSSDeclaration::RemovePropertyInternal(
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const nsAString& aPropertyName) {
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if (IsReadOnly()) {
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return NS_OK;
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}
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DeclarationBlock* olddecl =
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GetOrCreateCSSDeclaration(eOperation_RemoveProperty, nullptr);
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if (!olddecl) {
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return NS_OK; // no decl, so nothing to remove
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}
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// For nsDOMCSSAttributeDeclaration, SetCSSDeclaration will lead to
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// Attribute setting code, which leads in turn to BeginUpdate. We
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// need to start the update now so that the old rule doesn't get used
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// between when we mutate the declaration and when we set the new
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// rule (see stack in bug 209575).
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mozAutoDocUpdate autoUpdate(DocToUpdate(), true);
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DeclarationBlockMutationClosure closure = {};
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MutationClosureData closureData;
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GetPropertyChangeClosure(&closure, &closureData);
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RefPtr<DeclarationBlock> decl = olddecl->EnsureMutable();
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if (!decl->RemoveProperty(aPropertyName, closure)) {
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return NS_OK;
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}
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return SetCSSDeclaration(decl, &closureData);
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}
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