1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "mozilla/ServoElementSnapshot.h"
8 #include "mozilla/GeckoBindings.h"
9 #include "mozilla/dom/Element.h"
10 #include "nsIContentInlines.h"
11 #include "nsContentUtils.h"
12
13 namespace mozilla {
14
ServoElementSnapshot(const Element & aElement)15 ServoElementSnapshot::ServoElementSnapshot(const Element& aElement)
16 : mState(0),
17 mContains(Flags(0)),
18 mIsTableBorderNonzero(false),
19 mIsMozBrowserFrame(false),
20 mIsSelectListBox(false),
21 mClassAttributeChanged(false),
22 mIdAttributeChanged(false) {
23 MOZ_COUNT_CTOR(ServoElementSnapshot);
24 MOZ_ASSERT(NS_IsMainThread());
25 mIsInChromeDocument = nsContentUtils::IsChromeDoc(aElement.OwnerDoc());
26 mSupportsLangAttr = aElement.SupportsLangAttr();
27 }
28
AddOtherPseudoClassState(const Element & aElement)29 void ServoElementSnapshot::AddOtherPseudoClassState(const Element& aElement) {
30 if (HasOtherPseudoClassState()) {
31 return;
32 }
33
34 mIsTableBorderNonzero = Gecko_IsTableBorderNonzero(&aElement);
35 mIsMozBrowserFrame = Gecko_IsBrowserFrame(&aElement);
36 mIsSelectListBox = Gecko_IsSelectListBox(&aElement);
37
38 mContains |= Flags::OtherPseudoClassState;
39 }
40
AddAttrs(const Element & aElement,int32_t aNameSpaceID,nsAtom * aAttribute)41 void ServoElementSnapshot::AddAttrs(const Element& aElement,
42 int32_t aNameSpaceID, nsAtom* aAttribute) {
43 if (aNameSpaceID == kNameSpaceID_None) {
44 if (aAttribute == nsGkAtoms::_class) {
45 if (mClassAttributeChanged) {
46 return;
47 }
48 mClassAttributeChanged = true;
49 } else if (aAttribute == nsGkAtoms::id) {
50 if (mIdAttributeChanged) {
51 return;
52 }
53 mIdAttributeChanged = true;
54 }
55 }
56
57 if (!mChangedAttrNames.Contains(aAttribute)) {
58 mChangedAttrNames.AppendElement(aAttribute);
59 }
60
61 if (HasAttrs()) {
62 return;
63 }
64
65 uint32_t attrCount = aElement.GetAttrCount();
66 mAttrs.SetCapacity(attrCount);
67 for (uint32_t i = 0; i < attrCount; ++i) {
68 const BorrowedAttrInfo info = aElement.GetAttrInfoAt(i);
69 MOZ_ASSERT(info);
70 mAttrs.AppendElement(AttrArray::InternalAttr{*info.mName, *info.mValue});
71 }
72
73 mContains |= Flags::Attributes;
74 if (aElement.HasID()) {
75 mContains |= Flags::Id;
76 }
77
78 if (const nsAttrValue* classValue = aElement.GetClasses()) {
79 // FIXME(emilio): It's pretty unfortunate that this is only relevant for
80 // SVG, yet it's a somewhat expensive copy. We should be able to do
81 // better!
82 mClass = *classValue;
83 mContains |= Flags::MaybeClass;
84 }
85 }
86
87 } // namespace mozilla
88