Implement CSS parser part for ::slotted pseudo element

third_party/WebKit/Source/core/css/CSSSelector.cpp

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
  *               2001-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 246 matching lines @@
     case PseudoPastCue:
     case PseudoUnresolved:
     case PseudoContent:
     case PseudoHost:
     case PseudoHostContext:
     case PseudoShadow:
     case PseudoFullScreen:
     case PseudoFullScreenAncestor:
     case PseudoSpatialNavigationFocus:
     case PseudoListBox:
+    case PseudoSlotted:
         return NOPSEUDO;
     }
 
     ASSERT_NOT_REACHED();
     return NOPSEUDO;
 }
 
 // Could be made smaller and faster by replacing pointer with an
 // offset into a string buffer and making the bit fields smaller but
 // that could not be maintained by hand.
@@ skipping 83 matching lines @@
 {"-webkit-any",      CSSSelector::PseudoAny},
 {"cue",              CSSSelector::PseudoCue},
 {"host",             CSSSelector::PseudoHost},
 {"host-context",     CSSSelector::PseudoHostContext},
 {"lang",             CSSSelector::PseudoLang},
 {"not",              CSSSelector::PseudoNot},
 {"nth-child",        CSSSelector::PseudoNthChild},
 {"nth-last-child",   CSSSelector::PseudoNthLastChild},
 {"nth-last-of-type", CSSSelector::PseudoNthLastOfType},
 {"nth-of-type",      CSSSelector::PseudoNthOfType},
+{"slotted",          CSSSelector::PseudoSlotted},
 };
 
 class NameToPseudoCompare {
 public:
     NameToPseudoCompare(const AtomicString& key) : m_key(key) { ASSERT(m_key.is8Bit()); }
 
     bool operator()(const NameToPseudoStruct& entry, const NameToPseudoStruct&)
     {
         ASSERT(entry.string);
         const char* key = reinterpret_cast<const char*>(m_key.characters8());
@@ skipping 94 matching lines @@
     case PseudoScrollbar:
     case PseudoScrollbarCorner:
     case PseudoScrollbarButton:
     case PseudoScrollbarThumb:
     case PseudoScrollbarTrack:
     case PseudoScrollbarTrackPiece:
     case PseudoSelection:
     case PseudoWebKitCustomElement:
     case PseudoContent:
     case PseudoShadow:
+    case PseudoSlotted:
         if (m_match != PseudoElement)
             m_pseudoType = PseudoUnknown;
         break;
     case PseudoFirstPage:
     case PseudoLeftPage:
     case PseudoRightPage:
         if (m_match != PagePseudoClass)
             m_pseudoType = PseudoUnknown;
         break;
     case PseudoActive:
@@ skipping 224 matching lines @@
             return tagHistory->selectorText(" > " + str.toString() + rightSide);
         case ShadowDeep:
             return tagHistory->selectorText(" /deep/ " + str.toString() + rightSide);
         case DirectAdjacent:
             return tagHistory->selectorText(" + " + str.toString() + rightSide);
         case IndirectAdjacent:
             return tagHistory->selectorText(" ~ " + str.toString() + rightSide);
         case SubSelector:
             ASSERT_NOT_REACHED();
         case ShadowPseudo:
+        case ShadowSlot:
             return tagHistory->selectorText(str.toString() + rightSide);
         }
     }
     return str.toString() + rightSide;
 }
 
 void CSSSelector::setAttribute(const QualifiedName& value, AttributeMatchType matchType)
 {
     createRareData();
     m_data.m_rareData->m_attribute = value;
@@ skipping 50 matching lines @@
     case CSSSelector::PseudoFirstChild:
     case CSSSelector::PseudoLastChild:
     case CSSSelector::PseudoFirstOfType:
     case CSSSelector::PseudoLastOfType:
     case CSSSelector::PseudoOnlyOfType:
     case CSSSelector::PseudoHost:
     case CSSSelector::PseudoHostContext:
     case CSSSelector::PseudoNot:
     case CSSSelector::PseudoSpatialNavigationFocus:
     case CSSSelector::PseudoListBox:
+    case CSSSelector::PseudoSlotted:

[rune, 2016/01/15 11:01:16]

This method is used for validating selectors in <content select="...">. I doubt
PseudoSlotted should be allowed there?

[kochi, 2016/01/19 07:25:56]

Good catch.

It seems I mistakenly added this line.

This function should have returned false for pseudo elements
in another switch-case above
(case CSSSelector::PseudoElement: return false) already.

Removed this line.

         return true;
     default:
         return false;
     }
 }
 
 bool CSSSelector::isCompound() const
 {
     if (!validateSubSelector(this))
         return false;
@@ skipping 91 matching lines @@
         if (count < nthBValue())
             return false;
         return (count - nthBValue()) % nthAValue() == 0;
     }
     if (count > nthBValue())
         return false;
     return (nthBValue() - count) % (-nthAValue()) == 0;
 }
 
 } // namespace blink