| // 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. |
| |
| #ifndef PDF_DOCUMENT_LAYOUT_H_ |
| #define PDF_DOCUMENT_LAYOUT_H_ |
| |
| #include <vector> |
| |
| #include "pdf/draw_utils/coordinates.h" |
| #include "ppapi/cpp/rect.h" |
| #include "ppapi/cpp/size.h" |
| |
| namespace chrome_pdf { |
| |
| // Layout of pages within a PDF document. Pages are placed as rectangles |
| // (possibly rotated) in a non-overlapping vertical sequence. |
| // |
| // All layout units are pixels. |
| // |
| // The |Options| class controls the behavior of the layout, such as the default |
| // orientation of pages. |
| class DocumentLayout final { |
| public: |
| // Options controlling layout behavior. |
| class Options final { |
| public: |
| Options(); |
| |
| Options(const Options& other); |
| Options& operator=(const Options& other); |
| |
| ~Options(); |
| |
| // Returns the default page orientation, encoded as an integer from 0 to 3 |
| // (inclusive). |
| // |
| // A return value of 0 indicates the original page orientation, with each |
| // increment indicating clockwise rotation by an additional 90 degrees. |
| // |
| // TODO(kmoon): Return an enum (class) instead of an integer. |
| int default_page_orientation() const { return default_page_orientation_; } |
| |
| // Rotates default page orientation 90 degrees clockwise. |
| void RotatePagesClockwise(); |
| |
| // Rotates default page orientation 90 degrees counterclockwise. |
| void RotatePagesCounterclockwise(); |
| |
| private: |
| // Orientations are non-negative integers modulo 4. |
| int default_page_orientation_ = 0; |
| }; |
| |
| static const draw_utils::PageInsetSizes kSingleViewInsets; |
| static constexpr int32_t kBottomSeparator = 4; |
| static constexpr int32_t kHorizontalSeparator = 1; |
| |
| DocumentLayout(); |
| |
| DocumentLayout(const DocumentLayout& other) = delete; |
| DocumentLayout& operator=(const DocumentLayout& other) = delete; |
| |
| ~DocumentLayout(); |
| |
| // Returns the layout options. |
| const Options& options() const { return options_; } |
| |
| // Sets the layout options. |
| void set_options(const Options& options) { options_ = options; } |
| |
| // Returns the layout's total size. |
| const pp::Size& size() const { return size_; } |
| |
| // Sets the layout's total size. |
| void set_size(const pp::Size& size) { size_ = size; } |
| |
| // Given |page_sizes| and the layout's width is set to the max page width of |
| // the document's pages, return pp::Rects that represent |page_sizes| |
| // formatted for two-up view and update the layout's size to the size of the |
| // new two-up view layout. |
| std::vector<pp::Rect> GetTwoUpViewLayout( |
| const std::vector<pp::Size>& page_sizes); |
| |
| // Increases the layout's total height by |height|. |
| void EnlargeHeight(int height); |
| |
| // Appends a rectangle of size |page_rect| to the layout. This will increase |
| // the layout's height by the page's height, and increase the layout's width |
| // to at least the page's width. |
| void AppendPageRect(const pp::Size& page_rect); |
| |
| private: |
| Options options_; |
| |
| // Layout's total size. |
| pp::Size size_; |
| }; |
| |
| } // namespace chrome_pdf |
| |
| #endif // PDF_DOCUMENT_LAYOUT_H_ |