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
29namespace WebCore {
30
31CSSMediaRule::CSSMediaRule(CSSStyleSheet* parent, PassRefPtr<MediaList> media, PassRefPtr<CSSRuleList> rules)
32    : CSSRule(parent)
33    , m_lstMedia(media)
34    , m_lstCSSRules(rules)
35{
36}
37
38CSSMediaRule::~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
48unsigned 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
57unsigned 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
94void 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
109String 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
132