| // 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 "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. |
| // |
| // TODO(crbug.com/51472): Support multiple columns. |
| class DocumentLayout final { |
| public: |
| DocumentLayout(); |
| |
| DocumentLayout(const DocumentLayout& other); |
| DocumentLayout& operator=(const DocumentLayout& other); |
| |
| ~DocumentLayout(); |
| |
| // Returns an integer from 0 to 3 (inclusive), encoding the default |
| // orientation of the document's pages. |
| // |
| // 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 all pages 90 degrees clockwise. Does not recompute layout. |
| void RotatePagesClockwise(); |
| |
| // Rotates all pages 90 degrees counterclockwise. Does not recompute layout. |
| void RotatePagesCounterclockwise(); |
| |
| // 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; } |
| |
| // 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: |
| // Orientations are non-negative integers modulo 4. |
| // |
| // TODO(kmoon): Doesn't match return type of default_page_orientation(). |
| // Callers expect int, but internally, we want unsigned semantics. This will |
| // be cleaned up when we switch to an enum. |
| unsigned int default_page_orientation_ = 0; |
| |
| // Layout's total size. |
| pp::Size size_; |
| }; |
| |
| } // namespace chrome_pdf |
| |
| #endif // PDF_DOCUMENT_LAYOUT_H_ |