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      1 /*
      2  * Copyright (C) 2003 Lars Knoll (knoll (at) kde.org)
      3  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef CSSParserValues_h
     22 #define CSSParserValues_h
     23 
     24 #include "CSSSelector.h"
     25 #include <wtf/text/AtomicString.h>
     26 
     27 namespace WebCore {
     28 
     29 class CSSValue;
     30 class QualifiedName;
     31 
     32 struct CSSParserString {
     33     UChar* characters;
     34     int length;
     35 
     36     void lower();
     37 
     38     operator String() const { return String(characters, length); }
     39     operator AtomicString() const { return AtomicString(characters, length); }
     40 };
     41 
     42 struct CSSParserFunction;
     43 
     44 struct CSSParserValue {
     45     int id;
     46     bool isInt;
     47     union {
     48         double fValue;
     49         int iValue;
     50         CSSParserString string;
     51         CSSParserFunction* function;
     52     };
     53     enum {
     54         Operator = 0x100000,
     55         Function = 0x100001,
     56         Q_EMS    = 0x100002
     57     };
     58     int unit;
     59 
     60 
     61     PassRefPtr<CSSValue> createCSSValue();
     62 };
     63 
     64 class CSSParserValueList {
     65     WTF_MAKE_FAST_ALLOCATED;
     66 public:
     67     CSSParserValueList()
     68         : m_current(0)
     69     {
     70     }
     71     ~CSSParserValueList();
     72 
     73     void addValue(const CSSParserValue&);
     74     void insertValueAt(unsigned, const CSSParserValue&);
     75     void deleteValueAt(unsigned);
     76     void extend(CSSParserValueList&);
     77 
     78     unsigned size() const { return m_values.size(); }
     79     CSSParserValue* current() { return m_current < m_values.size() ? &m_values[m_current] : 0; }
     80     CSSParserValue* next() { ++m_current; return current(); }
     81 
     82     CSSParserValue* valueAt(unsigned i) { return i < m_values.size() ? &m_values[i] : 0; }
     83 
     84     void clear() { m_values.clear(); }
     85 
     86 private:
     87     unsigned m_current;
     88     Vector<CSSParserValue, 4> m_values;
     89 };
     90 
     91 struct CSSParserFunction {
     92     WTF_MAKE_FAST_ALLOCATED;
     93 public:
     94     CSSParserString name;
     95     OwnPtr<CSSParserValueList> args;
     96 };
     97 
     98 class CSSParserSelector {
     99     WTF_MAKE_FAST_ALLOCATED;
    100 public:
    101     CSSParserSelector();
    102     ~CSSParserSelector();
    103 
    104     PassOwnPtr<CSSSelector> releaseSelector() { return m_selector.release(); }
    105 
    106     void setTag(const QualifiedName& value) { m_selector->setTag(value); }
    107     void setValue(const AtomicString& value) { m_selector->setValue(value); }
    108     void setAttribute(const QualifiedName& value) { m_selector->setAttribute(value); }
    109     void setArgument(const AtomicString& value) { m_selector->setArgument(value); }
    110     void setMatch(CSSSelector::Match value) { m_selector->m_match = value; }
    111     void setRelation(CSSSelector::Relation value) { m_selector->m_relation = value; }
    112     void setForPage() { m_selector->setForPage(); }
    113 
    114     void adoptSelectorVector(Vector<OwnPtr<CSSParserSelector> >& selectorVector);
    115 
    116     CSSSelector::PseudoType pseudoType() const { return m_selector->pseudoType(); }
    117     bool isUnknownPseudoElement() const { return m_selector->isUnknownPseudoElement(); }
    118     bool isSimple() const { return !m_tagHistory && m_selector->isSimple(); }
    119 
    120     CSSParserSelector* tagHistory() const { return m_tagHistory.get(); }
    121     void setTagHistory(PassOwnPtr<CSSParserSelector> selector) { m_tagHistory = selector; }
    122 
    123 private:
    124     OwnPtr<CSSSelector> m_selector;
    125     OwnPtr<CSSParserSelector> m_tagHistory;
    126 };
    127 
    128 }
    129 
    130 #endif
    131