| // Copyright 2019 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 "pdf/document_layout.h" |
| |
| #include "base/logging.h" |
| |
| namespace chrome_pdf { |
| |
| namespace { |
| |
| int GetWidestPageWidth(const std::vector<pp::Size>& page_sizes) { |
| int widest_page_width = 0; |
| for (const auto& page_size : page_sizes) { |
| widest_page_width = std::max(widest_page_width, page_size.width()); |
| } |
| |
| return widest_page_width; |
| } |
| |
| pp::Rect InsetRect(pp::Rect rect, |
| const draw_utils::PageInsetSizes& inset_sizes) { |
| rect.Inset(inset_sizes.left, inset_sizes.top, inset_sizes.right, |
| inset_sizes.bottom); |
| return rect; |
| } |
| |
| } // namespace |
| |
| const draw_utils::PageInsetSizes DocumentLayout::kSingleViewInsets{ |
| /*left=*/5, /*top=*/3, /*right=*/5, /*bottom=*/7}; |
| |
| DocumentLayout::Options::Options() = default; |
| |
| DocumentLayout::Options::Options(const Options& other) = default; |
| DocumentLayout::Options& DocumentLayout::Options::operator=( |
| const Options& other) = default; |
| |
| DocumentLayout::Options::~Options() = default; |
| |
| void DocumentLayout::Options::RotatePagesClockwise() { |
| default_page_orientation_ = RotateClockwise(default_page_orientation_); |
| } |
| |
| void DocumentLayout::Options::RotatePagesCounterclockwise() { |
| default_page_orientation_ = RotateCounterclockwise(default_page_orientation_); |
| } |
| |
| DocumentLayout::DocumentLayout() = default; |
| |
| DocumentLayout::~DocumentLayout() = default; |
| |
| void DocumentLayout::ComputeSingleViewLayout( |
| const std::vector<pp::Size>& page_sizes) { |
| set_size({GetWidestPageWidth(page_sizes), 0}); |
| |
| page_layouts_.resize(page_sizes.size()); |
| for (size_t i = 0; i < page_sizes.size(); ++i) { |
| if (i != 0) { |
| // Add space for bottom separator. |
| EnlargeHeight(kBottomSeparator); |
| } |
| |
| const pp::Size& page_size = page_sizes[i]; |
| pp::Rect page_rect = draw_utils::GetRectForSingleView(page_size, size_); |
| page_layouts_[i].outer_rect = page_rect; |
| page_layouts_[i].inner_rect = InsetRect(page_rect, kSingleViewInsets); |
| |
| draw_utils::ExpandDocumentSize(page_size, &size_); |
| } |
| } |
| |
| void DocumentLayout::ComputeTwoUpViewLayout( |
| const std::vector<pp::Size>& page_sizes) { |
| set_size({GetWidestPageWidth(page_sizes), 0}); |
| |
| page_layouts_.resize(page_sizes.size()); |
| for (size_t i = 0; i < page_sizes.size(); ++i) { |
| draw_utils::PageInsetSizes page_insets = |
| draw_utils::GetPageInsetsForTwoUpView( |
| i, page_sizes.size(), kSingleViewInsets, kHorizontalSeparator); |
| const pp::Size& page_size = page_sizes[i]; |
| |
| pp::Rect page_rect; |
| if (i % 2 == 0) { |
| page_rect = draw_utils::GetLeftRectForTwoUpView( |
| page_size, {size_.width(), size_.height()}); |
| } else { |
| page_rect = draw_utils::GetRightRectForTwoUpView( |
| page_size, {size_.width(), size_.height()}); |
| EnlargeHeight(std::max(page_size.height(), page_sizes[i - 1].height())); |
| } |
| page_layouts_[i].outer_rect = page_rect; |
| page_layouts_[i].inner_rect = InsetRect(page_rect, page_insets); |
| } |
| |
| if (page_sizes.size() % 2 == 1) { |
| EnlargeHeight(page_sizes.back().height()); |
| } |
| |
| size_.set_width(2 * size_.width()); |
| } |
| |
| void DocumentLayout::EnlargeHeight(int height) { |
| DCHECK_GE(height, 0); |
| size_.Enlarge(0, height); |
| } |
| |
| } // namespace chrome_pdf |