1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef PRINTING_PAGE_NUMBER_H_ 6 #define PRINTING_PAGE_NUMBER_H_ 7 8 #include <ostream> 9 10 #include "printing/page_range.h" 11 12 namespace printing { 13 14 class PrintSettings; 15 16 // Represents a page series following the array of page ranges defined in a 17 // PrintSettings. 18 class PRINTING_EXPORT PageNumber { 19 public: 20 // Initializes the page to the first page in the settings's range or 0. 21 PageNumber(const PrintSettings& settings, int document_page_count); 22 23 PageNumber(); 24 25 void operator=(const PageNumber& other); 26 27 // Initializes the page to the first page in the setting's range or 0. It 28 // initialize to npos if the range is empty and document_page_count is 0. 29 void Init(const PrintSettings& settings, int document_page_count); 30 31 // Converts to a page numbers. 32 int ToInt() const { 33 return page_number_; 34 } 35 36 // Calculates the next page in the serie. 37 int operator++(); 38 39 // Returns an instance that represents the end of a serie. 40 static const PageNumber npos() { 41 return PageNumber(); 42 } 43 44 // Equality operator. Only the current page number is verified so that 45 // "page != PageNumber::npos()" works. 46 bool operator==(const PageNumber& other) const; 47 bool operator!=(const PageNumber& other) const; 48 49 private: 50 // The page range to follow. 51 const PageRanges* ranges_; 52 53 // The next page to be printed. -1 when not printing. 54 int page_number_; 55 56 // The next page to be printed. -1 when not used. Valid only if 57 // document()->settings().range.empty() is false. 58 int page_range_index_; 59 60 // Number of expected pages in the document. Used when ranges_ is NULL. 61 int document_page_count_; 62 }; 63 64 // Debug output support. 65 template<class E, class T> 66 inline typename std::basic_ostream<E,T>& operator<<( 67 typename std::basic_ostream<E,T>& ss, const PageNumber& page) { 68 return ss << page.ToInt(); 69 } 70 71 } // namespace printing 72 73 #endif // PRINTING_PAGE_NUMBER_H_ 74
