A thread-safe Media Query Parser

Source/core/css/parser/MediaQueryToken.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/css/parser/MediaQueryToken.h"
+
+#include "wtf/HashMap.h"
+#include "wtf/text/StringHash.h"
+
+namespace WebCore {
+
+
+MediaQueryToken::MediaQueryToken(MediaQueryTokenType type)
+    : m_type(type)
+    , m_delimiter(0)
+    , m_unit(CSSPrimitiveValue::CSS_UNKNOWN)
+{
+}
+
+// Just a helper used for Delimiter tokens.
+MediaQueryToken::MediaQueryToken(MediaQueryTokenType type, UChar c)
+    : m_type(type)
+    , m_delimiter(c)
+    , m_unit(CSSPrimitiveValue::CSS_UNKNOWN)
+{
+    ASSERT(m_type == DelimiterToken);
+}
+
+MediaQueryToken::MediaQueryToken(MediaQueryTokenType type, String value)
+    : m_type(type)
+    , m_value(value)
+    , m_delimiter(0)
+    , m_unit(CSSPrimitiveValue::CSS_UNKNOWN)
+{
+}
+
+MediaQueryToken::MediaQueryToken(MediaQueryTokenType type, double numericValue, NumericValueType numericValueType)
+    : m_type(type)
+    , m_delimiter(0)
+    , m_numericValueType(numericValueType)
+    , m_numericValue(numericValue)
+    , m_unit(CSSPrimitiveValue::CSS_NUMBER)
+{
+    ASSERT(type == NumberToken);
+}
+
+void MediaQueryToken::convertToDimensionWithUnit(String unit)
+{
+    ASSERT(m_type == NumberToken);
+    m_type = DimensionToken;
+    m_unit = CSSPrimitiveValue::getUnitTable().get(unit.lower());
+}
+
+void MediaQueryToken::convertToPercentage()
+{
+    ASSERT(m_type == NumberToken);
+    m_type = PercentageToken;
+    m_unit = CSSPrimitiveValue::CSS_PERCENTAGE;
+}
+
+} // namespace WebCore