Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 219 insertions, 0 deletions

diff --git a/dom/base/nsStyledElement.cpp b/dom/base/nsStyledElement.cpp
new file mode 100644
index 0000000000..cb2524c32c
--- /dev/null
+++ b/dom/base/nsStyledElement.cpp
@@ -0,0 +1,219 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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 "nsStyledElement.h"
+#include "mozAutoDocUpdate.h"
+#include "nsGkAtoms.h"
+#include "nsAttrValue.h"
+#include "nsAttrValueInlines.h"
+#include "mozilla/dom/BindContext.h"
+#include "mozilla/dom/CustomElementRegistry.h"
+#include "mozilla/dom/ElementInlines.h"
+#include "mozilla/dom/MutationEventBinding.h"
+#include "mozilla/dom/MutationObservers.h"
+#include "mozilla/InternalMutationEvent.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "nsDOMCSSDeclaration.h"
+#include "nsDOMCSSAttrDeclaration.h"
+#include "nsServiceManagerUtils.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/DeclarationBlock.h"
+#include "mozilla/css/Loader.h"
+#include "nsXULElement.h"
+#include "nsContentUtils.h"
+#include "nsStyleUtil.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+// Use the CC variant of this, even though this class does not define
+// a new CC participant, to make QIing to the CC interfaces faster.
+NS_IMPL_QUERY_INTERFACE_CYCLE_COLLECTION_INHERITED(nsStyledElement,
+                                                   nsStyledElementBase,
+                                                   nsStyledElement)
+
+//----------------------------------------------------------------------
+// nsIContent methods
+
+bool nsStyledElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                                     const nsAString& aValue,
+                                     nsIPrincipal* aMaybeScriptedPrincipal,
+                                     nsAttrValue& aResult) {
+  if (aAttribute == nsGkAtoms::style && aNamespaceID == kNameSpaceID_None) {
+    ParseStyleAttribute(aValue, aMaybeScriptedPrincipal, aResult, false);
+    return true;
+  }
+
+  return nsStyledElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,
+                                             aMaybeScriptedPrincipal, aResult);
+}
+
+void nsStyledElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
+                                    const nsAttrValue* aValue, bool aNotify) {
+  if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::style &&
+      aValue) {
+    SetMayHaveStyle();
+  }
+
+  return nsStyledElementBase::BeforeSetAttr(aNamespaceID, aName, aValue,
+                                            aNotify);
+}
+
+void nsStyledElement::InlineStyleDeclarationWillChange(
+    MutationClosureData& aData) {
+  MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript());
+  MOZ_ASSERT(OwnerDoc()->UpdateNestingLevel() > 0,
+             "Should be inside document update!");
+  bool modification = false;
+  if (MayHaveStyle()) {
+    bool needsOldValue = !StaticPrefs::dom_mutation_events_cssom_disabled() &&
+                         nsContentUtils::HasMutationListeners(
+                             this, NS_EVENT_BITS_MUTATION_ATTRMODIFIED, this);
+
+    if (!needsOldValue) {
+      CustomElementDefinition* definition = GetCustomElementDefinition();
+      if (definition &&
+          definition->IsInObservedAttributeList(nsGkAtoms::style)) {
+        needsOldValue = true;
+      }
+    }
+
+    if (needsOldValue) {
+      nsAutoString oldValueStr;
+      modification = GetAttr(kNameSpaceID_None, nsGkAtoms::style, oldValueStr);
+      if (modification) {
+        aData.mOldValue.emplace();
+        aData.mOldValue->SetTo(oldValueStr);
+      }
+    } else {
+      modification = HasAttr(kNameSpaceID_None, nsGkAtoms::style);
+    }
+  }
+
+  aData.mModType =
+      modification ? static_cast<uint8_t>(MutationEvent_Binding::MODIFICATION)
+                   : static_cast<uint8_t>(MutationEvent_Binding::ADDITION);
+  MutationObservers::NotifyAttributeWillChange(
+      this, kNameSpaceID_None, nsGkAtoms::style, aData.mModType);
+
+  // XXXsmaug In order to make attribute handling more consistent, consider to
+  //         call BeforeSetAttr and pass kCallAfterSetAttr to
+  //         SetAttrAndNotify in SetInlineStyleDeclaration.
+  //         Handling of mozAutoDocUpdate may require changes in that case.
+}
+
+nsresult nsStyledElement::SetInlineStyleDeclaration(
+    DeclarationBlock& aDeclaration, MutationClosureData& aData) {
+  MOZ_ASSERT(OwnerDoc()->UpdateNestingLevel(),
+             "Should be inside document update!");
+
+  bool hasListeners = !StaticPrefs::dom_mutation_events_cssom_disabled() &&
+                      nsContentUtils::HasMutationListeners(
+                          this, NS_EVENT_BITS_MUTATION_ATTRMODIFIED, this);
+
+  nsAttrValue attrValue(do_AddRef(&aDeclaration), nullptr);
+  SetMayHaveStyle();
+
+  Document* document = GetComposedDoc();
+  mozAutoDocUpdate updateBatch(document, true);
+  return SetAttrAndNotify(kNameSpaceID_None, nsGkAtoms::style, nullptr,
+                          aData.mOldValue.ptrOr(nullptr), attrValue, nullptr,
+                          aData.mModType, hasListeners, true,
+                          kDontCallAfterSetAttr, document, updateBatch);
+}
+
+// ---------------------------------------------------------------
+// Others and helpers
+
+nsICSSDeclaration* nsStyledElement::Style() {
+  Element::nsDOMSlots* slots = DOMSlots();
+
+  if (!slots->mStyle) {
+    // Just in case...
+    ReparseStyleAttribute(/* aForceInDataDoc */ true);
+
+    slots->mStyle = new nsDOMCSSAttributeDeclaration(this, false);
+    SetMayHaveStyle();
+  }
+
+  return slots->mStyle;
+}
+
+nsresult nsStyledElement::ReparseStyleAttribute(bool aForceInDataDoc) {
+  if (!MayHaveStyle()) {
+    return NS_OK;
+  }
+  const nsAttrValue* oldVal = mAttrs.GetAttr(nsGkAtoms::style);
+  if (oldVal && oldVal->Type() != nsAttrValue::eCSSDeclaration) {
+    nsAttrValue attrValue;
+    nsAutoString stringValue;
+    oldVal->ToString(stringValue);
+    ParseStyleAttribute(stringValue, nullptr, attrValue, aForceInDataDoc);
+    // Don't bother going through SetInlineStyleDeclaration; we don't
+    // want to fire off mutation events or document notifications anyway
+    bool oldValueSet;
+    nsresult rv =
+        mAttrs.SetAndSwapAttr(nsGkAtoms::style, attrValue, &oldValueSet);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  return NS_OK;
+}
+
+nsICSSDeclaration* nsStyledElement::GetExistingStyle() {
+  Element::nsDOMSlots* slots = GetExistingDOMSlots();
+  if (!slots) {
+    return nullptr;
+  }
+
+  return slots->mStyle;
+}
+
+void nsStyledElement::ParseStyleAttribute(const nsAString& aValue,
+                                          nsIPrincipal* aMaybeScriptedPrincipal,
+                                          nsAttrValue& aResult,
+                                          bool aForceInDataDoc) {
+  Document* doc = OwnerDoc();
+  bool isNativeAnon = IsInNativeAnonymousSubtree();
+
+  if (!isNativeAnon &&
+      !nsStyleUtil::CSPAllowsInlineStyle(this, doc, aMaybeScriptedPrincipal, 0,
+                                         0, aValue, nullptr))
+    return;
+
+  if (aForceInDataDoc || !doc->IsLoadedAsData() || GetExistingStyle() ||
+      doc->IsStaticDocument()) {
+    bool isCSS = true;  // assume CSS until proven otherwise
+
+    if (!isNativeAnon) {  // native anonymous content always assumes CSS
+      nsAutoString styleType;
+      doc->GetHeaderData(nsGkAtoms::headerContentStyleType, styleType);
+      if (!styleType.IsEmpty()) {
+        isCSS = StringBeginsWith(styleType, u"text/css"_ns,
+                                 nsASCIICaseInsensitiveStringComparator);
+      }
+    }
+
+    if (isCSS &&
+        aResult.ParseStyleAttribute(aValue, aMaybeScriptedPrincipal, this)) {
+      return;
+    }
+  }
+
+  aResult.SetTo(aValue);
+}
+
+nsresult nsStyledElement::BindToTree(BindContext& aContext, nsINode& aParent) {
+  nsresult rv = nsStyledElementBase::BindToTree(aContext, aParent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (HasAttr(nsGkAtoms::autofocus) && aContext.AllowsAutoFocus() &&
+      (!IsSVGElement() || IsFocusable())) {
+    aContext.OwnerDoc().ElementWithAutoFocusInserted(this);
+  }
+
+  return NS_OK;
+}