Move UnicodeRangeSet to platform/fonts

third_party/WebKit/Source/platform/fonts/UnicodeRangeSet.cpp

+/*
+ * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "UnicodeRangeSet.h"
+
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+UnicodeRangeSet::UnicodeRangeSet(const Vector<UnicodeRange>& ranges)
+    : m_ranges(ranges)
+{
+    if (m_ranges.isEmpty())
+        return;
+
+    std::sort(m_ranges.begin(), m_ranges.end());
+
+    // Unify overlapping ranges.
+    UChar32 from = m_ranges[0].from();
+    UChar32 to = m_ranges[0].to();
+    size_t targetIndex = 0;
+    for (size_t i = 1; i < m_ranges.size(); i++) {
+        if (to + 1 >= m_ranges[i].from()) {
+            to = std::max(to, m_ranges[i].to());
+        } else {
+            m_ranges[targetIndex++] = UnicodeRange(from, to);
+            from = m_ranges[i].from();
+            to = m_ranges[i].to();
+        }
+    }
+    m_ranges[targetIndex++] = UnicodeRange(from, to);
+    m_ranges.shrink(targetIndex);
+}
+
+bool UnicodeRangeSet::contains(UChar32 c) const
+{
+    if (isEntireRange())
+        return true;
+    Vector<UnicodeRange>::const_iterator it = std::lower_bound(m_ranges.begin(), m_ranges.end(), c);
+    return it != m_ranges.end() && it->contains(c);
+}
+
+bool UnicodeRangeSet::contains(const FontDataRange& range) const
+{
+    for (auto it = m_ranges.begin(); it != m_ranges.end(); ++it) {
+        if (*it == range)
+            return true;
+    }
+    return false;
+}
+
+bool UnicodeRangeSet::intersectsWith(const String& text) const
+{
+    if (text.isEmpty())
+        return false;
+    if (isEntireRange())
+        return true;
+    if (text.is8Bit() && m_ranges[0].from() >= 0x100)
+        return false;
+
+    unsigned index = 0;
+    while (index < text.length()) {
+        UChar32 c = text.characterStartingAt(index);
+        index += U16_LENGTH(c);
+        if (contains(c))
+            return true;
+    }
+    return false;
+}
+
+}