Index: Source/core/html/track/BufferedLineReader.h |
diff --git a/Source/core/html/track/BufferedLineReader.h b/Source/core/html/track/BufferedLineReader.h |
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+/* |
+ * Copyright (C) 2013, Opera Software ASA. All rights reserved. |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions are |
+ * met: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * 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. |
+ * * Neither the name of Google Inc. nor the names of its |
+ * contributors may be used to endorse or promote products derived from |
+ * this software without specific prior written permission. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ * "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 THE COPYRIGHT |
+ * OWNER 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. |
+ */ |
+ |
+#ifndef BufferedLineReader_h |
+#define BufferedLineReader_h |
+ |
+#include "platform/text/SegmentedString.h" |
+#include "wtf/text/StringBuilder.h" |
+ |
+namespace WebCore { |
+ |
+// Line collection helper for the WebVTT Parser. |
+// |
+// Converts a stream of data (== a sequence of Strings) into a set of |
+// lines. CR, LR or CRLF are considered linebreaks. Normalizes NULs (U+0000) |
+// to 'REPLACEMENT CHARACTER' (U+FFFD) and does not return the linebreaks as |
+// part of the result. |
+class BufferedLineReader { |
+ WTF_MAKE_NONCOPYABLE(BufferedLineReader); |
+public: |
+ BufferedLineReader() |
+ : m_endOfStream(false) |
+ , m_maybeSkipLF(false) { } |
+ |
+ // Append data to the internal buffer. |
+ void append(const String& data) |
+ { |
+ ASSERT(!m_endOfStream); |
+ m_buffer.append(SegmentedString(data)); |
+ } |
+ |
+ // Indicate that no more data will be appended. This will cause any |
+ // potentially "unterminated" line to be returned from getLine. |
+ void setEndOfStream() { m_endOfStream = true; } |
+ |
+ // Attempt to read a line from the internal buffer (fed via append). |
+ // If successful, true is returned and |line| is set to the line that was |
+ // read. If no line could be read false is returned. |
+ bool getLine(String& line); |
+ |
+ // Returns true if EOS has been reached proper. |
+ bool isAtEndOfStream() const { return m_endOfStream && m_buffer.isEmpty(); } |
+ |
+private: |
+ // Consume the next character the buffer if it is the character |c|. |
+ void scanCharacter(UChar c) |
+ { |
+ ASSERT(!m_buffer.isEmpty()); |
+ if (m_buffer.currentChar() == c) |
+ m_buffer.advance(); |
+ } |
+ |
+ SegmentedString m_buffer; |
+ StringBuilder m_lineBuffer; |
+ bool m_endOfStream; |
+ bool m_maybeSkipLF; |
+}; |
+ |
+} // namespace WebCore |
+ |
+#endif |