--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/html/TimeRanges.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2007, 2009, 2010 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 "config.h"
+
+#include "TimeRanges.h"
+
+#include <math.h>
+
+using namespace WebCore;
+
+TimeRanges::TimeRanges(float start, float end)
+{
+    add(start, end);
+}
+
+PassRefPtr<TimeRanges> TimeRanges::copy()
+{
+    RefPtr<TimeRanges> newSession = TimeRanges::create();
+    
+    unsigned size = m_ranges.size();
+    for (unsigned i = 0; i < size; i++)
+        newSession->add(m_ranges[i].m_start, m_ranges[i].m_end);
+    
+    return newSession.release();
+}
+
+float TimeRanges::start(unsigned index, ExceptionCode& ec) const 
+{ 
+    if (index >= length()) {
+        ec = INDEX_SIZE_ERR;
+        return 0;
+    }
+    return m_ranges[index].m_start;
+}
+
+float TimeRanges::end(unsigned index, ExceptionCode& ec) const 
+{ 
+    if (index >= length()) {
+        ec = INDEX_SIZE_ERR;
+        return 0;
+    }
+    return m_ranges[index].m_end;
+}
+
+void TimeRanges::add(float start, float end) 
+{
+    ASSERT(start <= end);
+    unsigned int overlappingArcIndex;
+    Range addedRange(start, end);
+
+    // For each present range check if we need to:
+    // - merge with the added range, in case we are overlapping or contiguous
+    // - Need to insert in place, we we are completely, not overlapping and not contiguous
+    // in between two ranges.
+    //
+    // TODO: Given that we assume that ranges are correctly ordered, this could be optimized.
+
+    for (overlappingArcIndex = 0; overlappingArcIndex < m_ranges.size(); overlappingArcIndex++) {
+        if (addedRange.isOverlappingRange(m_ranges[overlappingArcIndex])
+         || addedRange.isContiguousWithRange(m_ranges[overlappingArcIndex])) {
+            // We need to merge the addedRange and that range.
+            addedRange = addedRange.unionWithOverlappingOrContiguousRange(m_ranges[overlappingArcIndex]);
+            m_ranges.remove(overlappingArcIndex);
+            overlappingArcIndex--;
+        } else {
+            // Check the case for which there is no more to do
+            if (!overlappingArcIndex) {
+                if (addedRange.isBeforeRange(m_ranges[0])) {
+                    // First index, and we are completely before that range (and not contiguous, nor overlapping).
+                    // We just need to be inserted here.
+                    break;
+                }
+            } else {
+                if (m_ranges[overlappingArcIndex - 1].isBeforeRange(addedRange)
+                 && addedRange.isBeforeRange(m_ranges[overlappingArcIndex])) {
+                    // We are exactly after the current previous range, and before the current range, while
+                    // not overlapping with none of them. Insert here.
+                    break;
+                }
+            }
+        }
+    }
+
+    // Now that we are sure we don't overlap with any range, just add it.
+    m_ranges.insert(overlappingArcIndex, addedRange);
+}
+
+bool TimeRanges::contain(float time) const
+{ 
+    ExceptionCode unused;
+    for (unsigned n = 0; n < length(); n++) {
+        if (time >= start(n, unused) && time <= end(n, unused))
+            return true;
+    }
+    return false;
+}
+
+float TimeRanges::nearest(float time) const
+{ 
+    ExceptionCode unused;
+    float closest = 0;
+    unsigned count = length();
+    for (unsigned ndx = 0; ndx < count; ndx++) {
+        float startTime = start(ndx, unused);
+        float endTime = end(ndx, unused);
+        if (time >= startTime && time <= endTime)
+            return time;
+        if (fabs(startTime - time) < closest)
+            closest = fabsf(startTime - time);
+        else if (fabs(endTime - time) < closest)
+            closest = fabsf(endTime - time);
+    }
+    return closest;
+}