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      1 /**
      2  * (C) 1999-2003 Lars Knoll (knoll (at) kde.org)
      3  * (C) 2002-2003 Dirk Mueller (mueller (at) kde.org)
      4  * Copyright (C) 2002, 2005, 2006 Apple Computer, Inc.
      5  * Copyright (C) 2006 Samuel Weinig (sam (at) 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     int length = m_lstCSSRules->length();
     37     for (int i = 0; i < length; i++)
     38         m_lstCSSRules->item(i)->setParent(this);
     39 }
     40 
     41 CSSMediaRule::~CSSMediaRule()
     42 {
     43     if (m_lstMedia)
     44         m_lstMedia->setParent(0);
     45 
     46     int length = m_lstCSSRules->length();
     47     for (int i = 0; i < length; i++)
     48         m_lstCSSRules->item(i)->setParent(0);
     49 }
     50 
     51 unsigned CSSMediaRule::append(CSSRule* rule)
     52 {
     53     if (!rule)
     54         return 0;
     55 
     56     rule->setParent(this);
     57     return m_lstCSSRules->insertRule(rule, m_lstCSSRules->length());
     58 }
     59 
     60 unsigned CSSMediaRule::insertRule(const String& rule, unsigned index, ExceptionCode& ec)
     61 {
     62     if (index > m_lstCSSRules->length()) {
     63         // INDEX_SIZE_ERR: Raised if the specified index is not a valid insertion point.
     64         ec = INDEX_SIZE_ERR;
     65         return 0;
     66     }
     67 
     68     CSSParser p(useStrictParsing());
     69     RefPtr<CSSRule> newRule = p.parseRule(parentStyleSheet(), rule);
     70     if (!newRule) {
     71         // SYNTAX_ERR: Raised if the specified rule has a syntax error and is unparsable.
     72         ec = SYNTAX_ERR;
     73         return 0;
     74     }
     75 
     76     if (newRule->isImportRule()) {
     77         // FIXME: an HIERARCHY_REQUEST_ERR should also be thrown for a @charset or a nested
     78         // @media rule.  They are currently not getting parsed, resulting in a SYNTAX_ERR
     79         // to get raised above.
     80 
     81         // HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the specified
     82         // index, e.g., if an @import rule is inserted after a standard rule set or other
     83         // at-rule.
     84         ec = HIERARCHY_REQUEST_ERR;
     85         return 0;
     86     }
     87 
     88     newRule->setParent(this);
     89     unsigned returnedIndex = m_lstCSSRules->insertRule(newRule.get(), index);
     90 
     91     if (stylesheet())
     92         stylesheet()->styleSheetChanged();
     93 
     94     return returnedIndex;
     95 }
     96 
     97 void CSSMediaRule::deleteRule(unsigned index, ExceptionCode& ec)
     98 {
     99     if (index >= m_lstCSSRules->length()) {
    100         // INDEX_SIZE_ERR: Raised if the specified index does not correspond to a
    101         // rule in the media rule list.
    102         ec = INDEX_SIZE_ERR;
    103         return;
    104     }
    105 
    106     m_lstCSSRules->deleteRule(index);
    107 
    108     if (stylesheet())
    109         stylesheet()->styleSheetChanged();
    110 }
    111 
    112 String CSSMediaRule::cssText() const
    113 {
    114     String result = "@media ";
    115     if (m_lstMedia) {
    116         result += m_lstMedia->mediaText();
    117         result += " ";
    118     }
    119     result += "{ \n";
    120 
    121     if (m_lstCSSRules) {
    122         unsigned len = m_lstCSSRules->length();
    123         for (unsigned i = 0; i < len; i++) {
    124             result += "  ";
    125             result += m_lstCSSRules->item(i)->cssText();
    126             result += "\n";
    127         }
    128     }
    129 
    130     result += "}";
    131     return result;
    132 }
    133 
    134 } // namespace WebCore
    135