1 /*

     2  * Copyright (C) 2008 Apple Inc. All Rights Reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #include "config.h"

    27 #include "CSSVariablesDeclaration.h"

    28 

    29 #include "CSSParser.h"

    30 #include "CSSRule.h"

    31 #include "CSSValueList.h"

    32 #include "Document.h"

    33 #include "ExceptionCode.h"

    34 

    35 namespace WebCore {

    36 

    37 CSSVariablesDeclaration::CSSVariablesDeclaration(StyleBase* parent, const Vector<String>& names, const Vector<RefPtr<CSSValue> >& values)

    38     : StyleBase(parent)

    39 {

    40     m_variableNames = names;

    41     ASSERT(names.size() == values.size());

    42     unsigned s = names.size();

    43     for (unsigned i = 0; i < s; ++i)

    44         addParsedVariable(names[i], values[i], false);

    45 }

    46 

    47 CSSVariablesDeclaration::~CSSVariablesDeclaration()

    48 {

    49 }

    50 

    51 String CSSVariablesDeclaration::getVariableValue(const String& variableName)

    52 {

    53     CSSValue* val = m_variablesMap.get(variableName).get();

    54     if (val)

    55         return val->cssText();

    56     return "";

    57 }

    58 

    59 String CSSVariablesDeclaration::removeVariable(const String& variableName, ExceptionCode&)

    60 {

    61     // FIXME: The spec has this method taking an exception code but no exceptions are

    62     // specified as being thrown.

    63     RefPtr<CSSValue> val = m_variablesMap.take(variableName);

    64     String result = val ? val->cssText() : "";

    65     if (val) {

    66         int s = m_variableNames.size();

    67         for (int i = 0; i < s; ++i) {

    68             if (m_variableNames[i] == variableName) {

    69                 m_variableNames.remove(i);

    70                 i--;

    71                 s--;

    72             }

    73         }

    74         

    75         setNeedsStyleRecalc();

    76     }

    77     

    78     // FIXME: Communicate this change so that the document will update.

    79     return result;

    80 }

    81 

    82 void CSSVariablesDeclaration::setVariable(const String& variableName, const String& variableValue, ExceptionCode& excCode)

    83 {

    84     // Try to parse the variable value into a Value*.  If it fails we throw an exception.

    85     CSSParser parser(useStrictParsing());

    86     if (!parser.parseVariable(this, variableName, variableValue)) // If the parse succeeds, it will call addParsedVariable (our internal method for doing the add) with the parsed Value*.

    87         excCode = SYNTAX_ERR;

    88     else

    89         setNeedsStyleRecalc();

    90 }

    91 

    92 void CSSVariablesDeclaration::addParsedVariable(const String& variableName, PassRefPtr<CSSValue> variableValue, bool updateNamesList)

    93 {

    94 // FIXME: Disabling declarations as variable values for now since they no longer have a common base class with CSSValues.

    95 #if 0

    96     variableValue->setParent(this); // Needed to connect variables that are CSSMutableStyleDeclarations, since the parent couldn't be set until now.

    97 #endif

    98 

    99     // Don't leak duplicates.  For multiple variables with the same name, the last one

   100     // declared will win.

   101     CSSValue* current = m_variablesMap.take(variableName).get();

   102     if (!current && updateNamesList)

   103         m_variableNames.append(variableName);

   104     m_variablesMap.set(variableName, variableValue);

   105 

   106     // FIXME: Communicate this change so the document will update.

   107 }

   108 

   109 CSSValueList* CSSVariablesDeclaration::getParsedVariable(const String& variableName)

   110 {

   111     CSSValue* result = m_variablesMap.get(variableName).get();

   112     if (result->isValueList())

   113         return static_cast<CSSValueList*>(result);

   114     return 0;

   115 }

   116 

   117 CSSMutableStyleDeclaration* CSSVariablesDeclaration::getParsedVariableDeclarationBlock(const String&)

   118 {

   119 // FIXME: Disabling declarations as variable values for now since they no longer have a common base class with CSSValues.

   120 #if 0

   121     StyleBase* result = m_variablesMap.get(variableName).get();

   122 

   123     if (result->isMutableStyleDeclaration())

   124         return static_cast<CSSMutableStyleDeclaration*>(result);

   125 #endif

   126     return 0;

   127 }

   128 

   129 unsigned CSSVariablesDeclaration::length() const

   130 {

   131     return m_variableNames.size();

   132 }

   133 

   134 String CSSVariablesDeclaration::item(unsigned index)

   135 {

   136     if (index >= m_variableNames.size())

   137         return "";

   138     return m_variableNames[index];

   139 }

   140 

   141 CSSRule* CSSVariablesDeclaration::parentRule()

   142 {

   143     return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;

   144 }

   145 

   146 String CSSVariablesDeclaration::cssText() const

   147 {

   148     String result = "{ ";

   149     unsigned s = m_variableNames.size();

   150     for (unsigned i = 0; i < s; ++i) {

   151         result += m_variableNames[i] + ": ";

   152         result += m_variablesMap.get(m_variableNames[i])->cssText();

   153         if (i < s - 1)

   154             result += "; ";

   155     }

   156     result += " }";

   157     return result;

   158 }

   159 

   160 void CSSVariablesDeclaration::setCssText(const String&)

   161 {

   162     // FIXME: It's not clear if this is actually settable.

   163 }

   164 

   165 void CSSVariablesDeclaration::setNeedsStyleRecalc()

   166 {

   167     // FIXME: Make this much better (it has the same problem CSSMutableStyleDeclaration does).

   168     StyleBase* root = this;

   169     while (StyleBase* parent = root->parent())

   170         root = parent;

   171     if (root->isCSSStyleSheet())

   172         static_cast<CSSStyleSheet*>(root)->doc()->updateStyleSelector();

   173 }

   174 

   175 }