PrintPreview: [LINUX] Update the margin values after flipping the paper orientation.

printing/page_setup.cc

 // 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::Rotate() {
+  int temp_right = right;
+  right = bottom;
+  bottom = left;
+  left = top;
+  top = temp_right;
+}
+
 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() {
+PageSetup::PageSetup() : forced_margins_(false) {

[vandebo (ex-Chrome), 2011/11/03 21:12:57]

nit: not needed because it's in Clear

[kmadhusu, 2011/11/03 22:37:39]

Done.

   Clear();
 }
 
 PageSetup::~PageSetup() {}
 
 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;
 
-  CalculateSizesWithinRect(printable_area_, text_height_);
+  SetRequestedMarginsAndUpdateValues(requested_margins_);
 }
 
 void PageSetup::SetRequestedMargins(const PageMargins& requested_margins) {
-  requested_margins_ = requested_margins;
-  if (printable_area_.width() && printable_area_.height())
-    CalculateSizesWithinRect(printable_area_, text_height_);
+  forced_margins_ = false;
+  SetRequestedMarginsAndUpdateValues(requested_margins);
 }
 
 void PageSetup::ForceRequestedMargins(const PageMargins& requested_margins) {
-  requested_margins_ = requested_margins;
-  if (physical_size_.width() && physical_size_.height())
-    CalculateSizesWithinRect(gfx::Rect(physical_size_), 0);
+  forced_margins_ = true;
+  SetRequestedMarginsAndUpdateValues(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());
+    requested_margins_.Rotate();
     Init(new_size, new_printable_area, text_height_);
   }
 }
 
+void PageSetup::SetRequestedMarginsAndUpdateValues(
+    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());
@@ skipping 29 matching lines @@
                                    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