1 // Copyright 2006-2008 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "printing/page_number.h"
10 #include "base/check_op.h"
11 #include "printing/print_job_constants.h"
15 PageNumber::PageNumber(const PageRanges& ranges, uint32_t document_page_count) {
16 Init(ranges, document_page_count);
19 PageNumber::PageNumber()
21 page_number_(kInvalidPageIndex),
22 page_range_index_(kInvalidPageIndex),
23 document_page_count_(0) {}
25 PageNumber::PageNumber(const PageNumber& other) = default;
27 PageNumber& PageNumber::operator=(const PageNumber& other) = default;
29 void PageNumber::Init(const PageRanges& ranges, uint32_t document_page_count) {
30 DCHECK(document_page_count);
31 ranges_ = ranges.empty() ? nullptr : &ranges;
32 document_page_count_ = document_page_count;
34 uint32_t first_page = (*ranges_)[0].from;
35 if (first_page < document_page_count) {
36 page_range_index_ = 0;
37 page_number_ = (*ranges_)[0].from;
39 page_range_index_ = kInvalidPageIndex;
40 page_number_ = kInvalidPageIndex;
43 page_range_index_ = kInvalidPageIndex;
48 uint32_t PageNumber::operator++() {
50 if (page_number_ >= document_page_count_) {
53 } else if (ranges_ && page_number_ > (*ranges_)[page_range_index_].to) {
54 DCHECK_LE(ranges_->size(),
55 static_cast<size_t>(std::numeric_limits<int>::max()));
56 if (++page_range_index_ == ranges_->size()) {
60 page_number_ = (*ranges_)[page_range_index_].from;
61 if (page_number_ >= document_page_count_) {
70 bool PageNumber::operator==(const PageNumber& other) const {
71 return page_number_ == other.page_number_ &&
72 page_range_index_ == other.page_range_index_;
74 bool PageNumber::operator!=(const PageNumber& other) const {
75 return page_number_ != other.page_number_ ||
76 page_range_index_ != other.page_range_index_;
80 std::vector<uint32_t> PageNumber::GetPages(PageRanges ranges,
81 uint32_t page_count) {
82 PageRange::Normalize(ranges);
83 std::vector<uint32_t> printed_pages;
84 static constexpr uint32_t kMaxNumberOfPages = 100000;
85 printed_pages.reserve(std::min(page_count, kMaxNumberOfPages));
86 for (PageNumber page_number(ranges, std::min(page_count, kMaxNumberOfPages));
87 page_number != PageNumber::npos(); ++page_number) {
88 printed_pages.push_back(page_number.ToUint());
93 } // namespace printing