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- // 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.
- #include "printing/page_number.h"
- #include <algorithm>
- #include <limits>
- #include "base/check_op.h"
- #include "printing/print_job_constants.h"
- namespace printing {
- PageNumber::PageNumber(const PageRanges& ranges, uint32_t document_page_count) {
- Init(ranges, document_page_count);
- }
- PageNumber::PageNumber()
- : ranges_(nullptr),
- page_number_(kInvalidPageIndex),
- page_range_index_(kInvalidPageIndex),
- document_page_count_(0) {}
- PageNumber::PageNumber(const PageNumber& other) = default;
- PageNumber& PageNumber::operator=(const PageNumber& other) = default;
- void PageNumber::Init(const PageRanges& ranges, uint32_t document_page_count) {
- DCHECK(document_page_count);
- ranges_ = ranges.empty() ? nullptr : &ranges;
- document_page_count_ = document_page_count;
- if (ranges_) {
- uint32_t first_page = (*ranges_)[0].from;
- if (first_page < document_page_count) {
- page_range_index_ = 0;
- page_number_ = (*ranges_)[0].from;
- } else {
- page_range_index_ = kInvalidPageIndex;
- page_number_ = kInvalidPageIndex;
- }
- } else {
- page_range_index_ = kInvalidPageIndex;
- page_number_ = 0;
- }
- }
- uint32_t PageNumber::operator++() {
- ++page_number_;
- if (page_number_ >= document_page_count_) {
- // Finished.
- *this = npos();
- } else if (ranges_ && page_number_ > (*ranges_)[page_range_index_].to) {
- DCHECK_LE(ranges_->size(),
- static_cast<size_t>(std::numeric_limits<int>::max()));
- if (++page_range_index_ == ranges_->size()) {
- // Finished.
- *this = npos();
- } else {
- page_number_ = (*ranges_)[page_range_index_].from;
- }
- }
- return ToUint();
- }
- bool PageNumber::operator==(const PageNumber& other) const {
- return page_number_ == other.page_number_ &&
- page_range_index_ == other.page_range_index_;
- }
- bool PageNumber::operator!=(const PageNumber& other) const {
- return page_number_ != other.page_number_ ||
- page_range_index_ != other.page_range_index_;
- }
- // static
- std::vector<uint32_t> PageNumber::GetPages(PageRanges ranges,
- uint32_t page_count) {
- PageRange::Normalize(ranges);
- std::vector<uint32_t> printed_pages;
- static constexpr uint32_t kMaxNumberOfPages = 100000;
- printed_pages.reserve(std::min(page_count, kMaxNumberOfPages));
- for (PageNumber page_number(ranges, std::min(page_count, kMaxNumberOfPages));
- page_number != PageNumber::npos(); ++page_number) {
- printed_pages.push_back(page_number.ToUint());
- }
- return printed_pages;
- }
- } // namespace printing
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