| // Copyright (c) 2011 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_setup.h" |
| |
| #include <algorithm> |
| |
| #include "base/logging.h" |
| |
| namespace printing { |
| |
| PageMargins::PageMargins() |
| : header(0), |
| footer(0), |
| left(0), |
| right(0), |
| top(0), |
| bottom(0) { |
| } |
| |
| void PageMargins::Clear() { |
| header = 0; |
| footer = 0; |
| left = 0; |
| right = 0; |
| top = 0; |
| bottom = 0; |
| } |
| |
| bool PageMargins::Equals(const PageMargins& rhs) const { |
| return header == rhs.header && |
| footer == rhs.footer && |
| left == rhs.left && |
| top == rhs.top && |
| right == rhs.right && |
| bottom == rhs.bottom; |
| } |
| |
| PageSetup::PageSetup() { |
| Clear(); |
| } |
| |
| PageSetup::PageSetup(const PageSetup& other) = default; |
| |
| PageSetup::~PageSetup() = default; |
| |
| void PageSetup::Clear() { |
| physical_size_.SetSize(0, 0); |
| printable_area_.SetRect(0, 0, 0, 0); |
| overlay_area_.SetRect(0, 0, 0, 0); |
| content_area_.SetRect(0, 0, 0, 0); |
| effective_margins_.Clear(); |
| text_height_ = 0; |
| forced_margins_ = false; |
| } |
| |
| bool PageSetup::Equals(const PageSetup& rhs) const { |
| return physical_size_ == rhs.physical_size_ && |
| printable_area_ == rhs.printable_area_ && |
| overlay_area_ == rhs.overlay_area_ && |
| content_area_ == rhs.content_area_ && |
| effective_margins_.Equals(rhs.effective_margins_) && |
| requested_margins_.Equals(rhs.requested_margins_) && |
| text_height_ == rhs.text_height_; |
| } |
| |
| void PageSetup::Init(const gfx::Size& physical_size, |
| const gfx::Rect& printable_area, |
| int text_height) { |
| DCHECK_LE(printable_area.right(), physical_size.width()); |
| // I've seen this assert triggers on Canon GP160PF PCL 5e and HP LaserJet 5. |
| // Since we don't know the dpi here, just disable the check. |
| // DCHECK_LE(printable_area.bottom(), physical_size.height()); |
| DCHECK_GE(printable_area.x(), 0); |
| DCHECK_GE(printable_area.y(), 0); |
| DCHECK_GE(text_height, 0); |
| physical_size_ = physical_size; |
| printable_area_ = printable_area; |
| text_height_ = text_height; |
| |
| SetRequestedMarginsAndCalculateSizes(requested_margins_); |
| } |
| |
| void PageSetup::SetRequestedMargins(const PageMargins& requested_margins) { |
| forced_margins_ = false; |
| SetRequestedMarginsAndCalculateSizes(requested_margins); |
| } |
| |
| void PageSetup::ForceRequestedMargins(const PageMargins& requested_margins) { |
| forced_margins_ = true; |
| SetRequestedMarginsAndCalculateSizes(requested_margins); |
| } |
| |
| void PageSetup::FlipOrientation() { |
| if (physical_size_.width() && physical_size_.height()) { |
| gfx::Size new_size(physical_size_.height(), physical_size_.width()); |
| int new_y = physical_size_.width() - |
| (printable_area_.width() + printable_area_.x()); |
| gfx::Rect new_printable_area(printable_area_.y(), |
| new_y, |
| printable_area_.height(), |
| printable_area_.width()); |
| Init(new_size, new_printable_area, text_height_); |
| } |
| } |
| |
| void PageSetup::SetRequestedMarginsAndCalculateSizes( |
| const PageMargins& requested_margins) { |
| requested_margins_ = requested_margins; |
| if (physical_size_.width() && physical_size_.height()) { |
| if (forced_margins_) |
| CalculateSizesWithinRect(gfx::Rect(physical_size_), 0); |
| else |
| CalculateSizesWithinRect(printable_area_, text_height_); |
| } |
| } |
| |
| void PageSetup::CalculateSizesWithinRect(const gfx::Rect& bounds, |
| int text_height) { |
| // Calculate the effective margins. The tricky part. |
| effective_margins_.header = std::max(requested_margins_.header, |
| bounds.y()); |
| effective_margins_.footer = std::max(requested_margins_.footer, |
| physical_size_.height() - |
| bounds.bottom()); |
| effective_margins_.left = std::max(requested_margins_.left, |
| bounds.x()); |
| effective_margins_.top = std::max(std::max(requested_margins_.top, |
| bounds.y()), |
| effective_margins_.header + text_height); |
| effective_margins_.right = std::max(requested_margins_.right, |
| physical_size_.width() - |
| bounds.right()); |
| effective_margins_.bottom = |
| std::max(std::max(requested_margins_.bottom, |
| physical_size_.height() - bounds.bottom()), |
| effective_margins_.footer + text_height); |
| |
| // Calculate the overlay area. If the margins are excessive, the overlay_area |
| // size will be (0, 0). |
| overlay_area_.set_x(effective_margins_.left); |
| overlay_area_.set_y(effective_margins_.header); |
| overlay_area_.set_width(std::max(0, |
| physical_size_.width() - |
| effective_margins_.right - |
| overlay_area_.x())); |
| overlay_area_.set_height(std::max(0, |
| physical_size_.height() - |
| effective_margins_.footer - |
| overlay_area_.y())); |
| |
| // Calculate the content area. If the margins are excessive, the content_area |
| // size will be (0, 0). |
| content_area_.set_x(effective_margins_.left); |
| content_area_.set_y(effective_margins_.top); |
| content_area_.set_width(std::max(0, |
| physical_size_.width() - |
| effective_margins_.right - |
| content_area_.x())); |
| content_area_.set_height(std::max(0, |
| physical_size_.height() - |
| effective_margins_.bottom - |
| content_area_.y())); |
| } |
| |
| } // namespace printing |