CSSMediaRule.cpp revision cad810f21b803229eb11403f9209855525a25d57 
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    int length = m_lstCSSRules->length();
37    for (int i = 0; i < length; i++)
38        m_lstCSSRules->item(i)->setParent(this);
39}
40
41CSSMediaRule::~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
51unsigned 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
60unsigned 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    // stylesheet() can only return 0 for computed style declarations.
92    stylesheet()->styleSheetChanged();
93
94    return returnedIndex;
95}
96
97void 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    // stylesheet() can only return 0 for computed style declarations.
109    stylesheet()->styleSheetChanged();
110}
111
112String 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