Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 1 | // Copyright (c) 2006-2008 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 | #include "printing/page_number.h" |
| 6 | |
| 7 | #include <limits> |
| 8 | |
| 9 | #include "base/logging.h" |
| 10 | #include "printing/print_settings.h" |
| 11 | |
| 12 | namespace printing { |
| 13 | |
| 14 | PageNumber::PageNumber(const PrintSettings& settings, int document_page_count) { |
| 15 | Init(settings, document_page_count); |
| 16 | } |
| 17 | |
| 18 | PageNumber::PageNumber() |
| 19 | : ranges_(NULL), |
| 20 | page_number_(-1), |
| 21 | page_range_index_(-1), |
| 22 | document_page_count_(0) { |
| 23 | } |
| 24 | |
| 25 | void PageNumber::operator=(const PageNumber& other) { |
| 26 | ranges_ = other.ranges_; |
| 27 | page_number_ = other.page_number_; |
| 28 | page_range_index_ = other.page_range_index_; |
| 29 | document_page_count_ = other.document_page_count_; |
| 30 | } |
| 31 | |
| 32 | void PageNumber::Init(const PrintSettings& settings, int document_page_count) { |
| 33 | DCHECK(document_page_count); |
Torne (Richard Coles) | 1e9bf3e | 2013-10-31 11:16:26 +0000 | [diff] [blame] | 34 | ranges_ = settings.ranges().empty() ? NULL : &settings.ranges(); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 35 | document_page_count_ = document_page_count; |
| 36 | if (ranges_) { |
| 37 | page_range_index_ = 0; |
| 38 | page_number_ = (*ranges_)[0].from; |
| 39 | } else { |
| 40 | if (document_page_count) { |
| 41 | page_number_ = 0; |
| 42 | } else { |
| 43 | page_number_ = -1; |
| 44 | } |
| 45 | page_range_index_ = -1; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | int PageNumber::operator++() { |
| 50 | if (!ranges_) { |
| 51 | // Switch to next page. |
| 52 | if (++page_number_ == document_page_count_) { |
| 53 | // Finished. |
| 54 | *this = npos(); |
| 55 | } |
| 56 | } else { |
| 57 | // Switch to next page. |
| 58 | ++page_number_; |
| 59 | // Page ranges are inclusive. |
| 60 | if (page_number_ > (*ranges_)[page_range_index_].to) { |
| 61 | DCHECK(ranges_->size() <= static_cast<size_t>( |
| 62 | std::numeric_limits<int>::max())); |
| 63 | if (++page_range_index_ == static_cast<int>(ranges_->size())) { |
| 64 | // Finished. |
| 65 | *this = npos(); |
| 66 | } else { |
| 67 | page_number_ = (*ranges_)[page_range_index_].from; |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | return ToInt(); |
| 72 | } |
| 73 | |
| 74 | bool PageNumber::operator==(const PageNumber& other) const { |
| 75 | return page_number_ == other.page_number_ && |
| 76 | page_range_index_ == other.page_range_index_; |
| 77 | } |
| 78 | bool PageNumber::operator!=(const PageNumber& other) const { |
| 79 | return page_number_ != other.page_number_ || |
| 80 | page_range_index_ != other.page_range_index_; |
| 81 | } |
| 82 | |
| 83 | } // namespace printing |