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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 <limits>
#include "base/logging.h"
#include "printing/print_settings.h"
namespace printing {
PageNumber::PageNumber(const PrintSettings& settings, int document_page_count) {
Init(settings, document_page_count);
}
PageNumber::PageNumber()
: ranges_(NULL),
page_number_(-1),
page_range_index_(-1),
document_page_count_(0) {
}
void PageNumber::operator=(const PageNumber& other) {
ranges_ = other.ranges_;
page_number_ = other.page_number_;
page_range_index_ = other.page_range_index_;
document_page_count_ = other.document_page_count_;
}
void PageNumber::Init(const PrintSettings& settings, int document_page_count) {
DCHECK(document_page_count);
ranges_ = settings.ranges().empty() ? NULL : &settings.ranges();
document_page_count_ = document_page_count;
if (ranges_) {
page_range_index_ = 0;
page_number_ = (*ranges_)[0].from;
} else {
if (document_page_count) {
page_number_ = 0;
} else {
page_number_ = -1;
}
page_range_index_ = -1;
}
}
int PageNumber::operator++() {
if (!ranges_) {
// Switch to next page.
if (++page_number_ == document_page_count_) {
// Finished.
*this = npos();
}
} else {
// Switch to next page.
++page_number_;
// Page ranges are inclusive.
if (page_number_ > (*ranges_)[page_range_index_].to) {
DCHECK(ranges_->size() <= static_cast<size_t>(
std::numeric_limits<int>::max()));
if (++page_range_index_ == static_cast<int>(ranges_->size())) {
// Finished.
*this = npos();
} else {
page_number_ = (*ranges_)[page_range_index_].from;
}
}
}
return ToInt();
}
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_;
}
} // namespace printing
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