1 files changed, 73 insertions, 0 deletions
diff --git a/printing/page_number.h b/printing/page_number.h
new file mode 100644
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--- /dev/null
+++ b/printing/page_number.h
@@ -0,0 +1,73 @@
+// Copyright (c) 2006-2008 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.
+
+#ifndef PRINTING_PAGE_NUMBER_H_
+#define PRINTING_PAGE_NUMBER_H_
+
+#include <ostream>
+
+#include "printing/page_range.h"
+
+namespace printing {
+
+class PrintSettings;
+
+// Represents a page series following the array of page ranges defined in a
+// PrintSettings.
+class PageNumber {
+ public:
+  // Initializes the page to the first page in the settings's range or 0.
+  PageNumber(const PrintSettings& settings, int document_page_count);
+
+  PageNumber();
+
+  void operator=(const PageNumber& other);
+
+  // Initializes the page to the first page in the setting's range or 0. It
+  // initialize to npos if the range is empty and document_page_count is 0.
+  void Init(const PrintSettings& settings, int document_page_count);
+
+  // Converts to a page numbers.
+  int ToInt() const {
+    return page_number_;
+  }
+
+  // Calculates the next page in the serie.
+  int operator++();
+
+  // Returns an instance that represents the end of a serie.
+  static const PageNumber npos() {
+    return PageNumber();
+  }
+
+  // Equality operator. Only the current page number is verified so that
+  // "page != PageNumber::npos()" works.
+  bool operator==(const PageNumber& other) const;
+  bool operator!=(const PageNumber& other) const;
+
+ private:
+  // The page range to follow.
+  const PageRanges* ranges_;
+
+  // The next page to be printed. -1 when not printing.
+  int page_number_;
+
+  // The next page to be printed. -1 when not used. Valid only if
+  // document()->settings().range.empty() is false.
+  int page_range_index_;
+
+  // Number of expected pages in the document. Used when ranges_ is NULL.
+  int document_page_count_;
+};
+
+// Debug output support.
+template<class E, class T>
+inline typename std::basic_ostream<E,T>& operator<<(
+    typename std::basic_ostream<E,T>& ss, const PageNumber& page) {
+  return ss << page.ToInt();
+}
+
+}  // namespace printing
+
+#endif  // PRINTING_PAGE_NUMBER_H_