1 /**

     2  * (C) 1999-2003 Lars Knoll (knoll@kde.org)

     3  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)

     4  * Copyright (C) 2002, 2005, 2006 Apple Computer, Inc.

     5  * Copyright (C) 2006 Samuel Weinig (sam@webkit.org)

     6  *

     7  * This library is free software; you can redistribute it and/or

     8  * modify it under the terms of the GNU Library General Public

     9  * License as published by the Free Software Foundation; either

    10  * version 2 of the License, or (at your option) any later version.

    11  *

    12  * This library is distributed in the hope that it will be useful,

    13  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    15  * Library General Public License for more details.

    16  *

    17  * You should have received a copy of the GNU Library General Public License

    18  * along with this library; see the file COPYING.LIB.  If not, write to

    19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    20  * Boston, MA 02110-1301, USA.

    21  */

    22 

    23 #include "config.h"

    24 #include "CSSMediaRule.h"

    25 

    26 #include "CSSParser.h"

    27 #include "ExceptionCode.h"

    28 

    29 namespace WebCore {

    30 

    31 CSSMediaRule::CSSMediaRule(CSSStyleSheet* parent, PassRefPtr<MediaList> media, PassRefPtr<CSSRuleList> rules)

    32     : CSSRule(parent)

    33     , m_lstMedia(media)

    34     , m_lstCSSRules(rules)

    35 {

    36 }

    37 

    38 CSSMediaRule::~CSSMediaRule()

    39 {

    40     if (m_lstMedia)

    41         m_lstMedia->setParent(0);

    42 

    43     int length = m_lstCSSRules->length();

    44     for (int i = 0; i < length; i++)

    45         m_lstCSSRules->item(i)->setParent(0);

    46 }

    47 

    48 unsigned CSSMediaRule::append(CSSRule* rule)

    49 {

    50     if (!rule)

    51         return 0;

    52 

    53     rule->setParent(this);

    54     return m_lstCSSRules->insertRule(rule, m_lstCSSRules->length());

    55 }

    56 

    57 unsigned CSSMediaRule::insertRule(const String& rule, unsigned index, ExceptionCode& ec)

    58 {

    59     if (index > m_lstCSSRules->length()) {

    60         // INDEX_SIZE_ERR: Raised if the specified index is not a valid insertion point.

    61         ec = INDEX_SIZE_ERR;

    62         return 0;

    63     }

    64 

    65     CSSParser p(useStrictParsing());

    66     RefPtr<CSSRule> newRule = p.parseRule(parentStyleSheet(), rule);

    67     if (!newRule) {

    68         // SYNTAX_ERR: Raised if the specified rule has a syntax error and is unparsable.

    69         ec = SYNTAX_ERR;

    70         return 0;

    71     }

    72 

    73     if (newRule->isImportRule()) {

    74         // FIXME: an HIERARCHY_REQUEST_ERR should also be thrown for a @charset or a nested

    75         // @media rule.  They are currently not getting parsed, resulting in a SYNTAX_ERR

    76         // to get raised above.

    77 

    78         // HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the specified

    79         // index, e.g., if an @import rule is inserted after a standard rule set or other

    80         // at-rule.

    81         ec = HIERARCHY_REQUEST_ERR;

    82         return 0;

    83     }

    84 

    85     newRule->setParent(this);

    86     unsigned returnedIndex = m_lstCSSRules->insertRule(newRule.get(), index);

    87 

    88     // stylesheet() can only return 0 for computed style declarations.

    89     stylesheet()->styleSheetChanged();

    90 

    91     return returnedIndex;

    92 }

    93 

    94 void CSSMediaRule::deleteRule(unsigned index, ExceptionCode& ec)

    95 {

    96     if (index >= m_lstCSSRules->length()) {

    97         // INDEX_SIZE_ERR: Raised if the specified index does not correspond to a

    98         // rule in the media rule list.

    99         ec = INDEX_SIZE_ERR;

   100         return;

   101     }

   102 

   103     m_lstCSSRules->deleteRule(index);

   104 

   105     // stylesheet() can only return 0 for computed style declarations.

   106     stylesheet()->styleSheetChanged();

   107 }

   108 

   109 String CSSMediaRule::cssText() const

   110 {

   111     String result = "@media ";

   112     if (m_lstMedia) {

   113         result += m_lstMedia->mediaText();

   114         result += " ";

   115     }

   116     result += "{ \n";

   117 

   118     if (m_lstCSSRules) {

   119         unsigned len = m_lstCSSRules->length();

   120         for (unsigned i = 0; i < len; i++) {

   121             result += "  ";

   122             result += m_lstCSSRules->item(i)->cssText();

   123             result += "\n";

   124         }

   125     }

   126 

   127     result += "}";

   128     return result;

   129 }

   130 

   131 } // namespace WebCore