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// Copyright (c) 2006-2008 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 "chrome/browser/printing/print_settings.h"
#include "base/atomic_sequence_num.h"
#include "base/logging.h"
#include "chrome/browser/printing/units.h"
#include "chrome/common/render_messages.h"
namespace printing {
// Global SequenceNumber used for generating unique cookie values.
static base::AtomicSequenceNumber cookie_seq(base::LINKER_INITIALIZED);
PrintSettings::PrintSettings()
: min_shrink(1.25),
max_shrink(2.0),
desired_dpi(72),
dpi_(0),
landscape_(false) {
}
void PrintSettings::Clear() {
ranges.clear();
min_shrink = 1.25;
max_shrink = 2.;
desired_dpi = 72;
printer_name_.clear();
device_name_.clear();
page_setup_cmm_.Clear();
page_setup_pixels_.Clear();
dpi_ = 0;
landscape_ = false;
}
#ifdef WIN32
void PrintSettings::Init(HDC hdc,
const DEVMODE& dev_mode,
const PageRanges& new_ranges,
const std::wstring& new_device_name) {
DCHECK(hdc);
printer_name_ = dev_mode.dmDeviceName;
device_name_ = new_device_name;
ranges = new_ranges;
landscape_ = dev_mode.dmOrientation == DMORIENT_LANDSCAPE;
int old_dpi = dpi_;
dpi_ = GetDeviceCaps(hdc, LOGPIXELSX);
// No printer device is known to advertise different dpi in X and Y axis; even
// the fax device using the 200x100 dpi setting. It's ought to break so many
// applications that it's not even needed to care about. WebKit doesn't
// support different dpi settings in X and Y axis.
DCHECK_EQ(dpi_, GetDeviceCaps(hdc, LOGPIXELSY));
DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORX), 0);
DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORY), 0);
// Initialize page_setup_pixels_.
gfx::Size physical_size_pixels(GetDeviceCaps(hdc, PHYSICALWIDTH),
GetDeviceCaps(hdc, PHYSICALHEIGHT));
gfx::Rect printable_area_pixels(GetDeviceCaps(hdc, PHYSICALOFFSETX),
GetDeviceCaps(hdc, PHYSICALOFFSETY),
GetDeviceCaps(hdc, HORZRES),
GetDeviceCaps(hdc, VERTRES));
// Hard-code text_height = 0.5cm = ~1/5 of inch
page_setup_pixels_.Init(physical_size_pixels, printable_area_pixels,
ConvertUnit(500, kHundrethsMMPerInch, dpi_));
// Initialize page_setup_cmm_.
// In theory, we should be using HORZSIZE and VERTSIZE but their value is
// so wrong it's useless. So read the values in dpi unit and convert them back
// in 0.01 mm.
gfx::Size physical_size_cmm(
ConvertUnit(physical_size_pixels.width(), dpi_, kHundrethsMMPerInch),
ConvertUnit(physical_size_pixels.height(), dpi_, kHundrethsMMPerInch));
gfx::Rect printable_area_cmm(
ConvertUnit(printable_area_pixels.x(), dpi_, kHundrethsMMPerInch),
ConvertUnit(printable_area_pixels.y(), dpi_, kHundrethsMMPerInch),
ConvertUnit(printable_area_pixels.width(), dpi_, kHundrethsMMPerInch),
ConvertUnit(printable_area_pixels.bottom(), dpi_, kHundrethsMMPerInch));
static const int kRoundingTolerance = 5;
// Some printers may advertise a slightly larger printable area than the
// physical area. This is mostly due to integer calculation and rounding.
if (physical_size_cmm.height() > printable_area_cmm.bottom() &&
physical_size_cmm.height() <= (printable_area_cmm.bottom() +
kRoundingTolerance)) {
physical_size_cmm.set_height(printable_area_cmm.bottom());
}
if (physical_size_cmm.width() > printable_area_cmm.right() &&
physical_size_cmm.width() <= (printable_area_cmm.right() +
kRoundingTolerance)) {
physical_size_cmm.set_width(printable_area_cmm.right());
}
page_setup_cmm_.Init(physical_size_cmm, printable_area_cmm, 500);
}
#endif
void PrintSettings::UpdateMarginsMetric(const PageMargins& new_margins) {
// Apply the new margins in 0.01 mm unit.
page_setup_cmm_.SetRequestedMargins(new_margins);
// Converts the margins in dpi unit and apply those too.
PageMargins pixels_margins;
pixels_margins.header = ConvertUnit(new_margins.header, kHundrethsMMPerInch,
dpi_);
pixels_margins.footer = ConvertUnit(new_margins.footer, kHundrethsMMPerInch,
dpi_);
pixels_margins.left = ConvertUnit(new_margins.left, kHundrethsMMPerInch,
dpi_);
pixels_margins.top = ConvertUnit(new_margins.top, kHundrethsMMPerInch, dpi_);
pixels_margins.right = ConvertUnit(new_margins.right, kHundrethsMMPerInch,
dpi_);
pixels_margins.bottom = ConvertUnit(new_margins.bottom, kHundrethsMMPerInch,
dpi_);
page_setup_pixels_.SetRequestedMargins(pixels_margins);
}
void PrintSettings::UpdateMarginsMilliInch(const PageMargins& new_margins) {
// Convert margins from thousandth inches to cmm (0.01mm).
PageMargins cmm_margins;
cmm_margins.header =
ConvertMilliInchToHundredThousanthMeter(new_margins.header);
cmm_margins.footer =
ConvertMilliInchToHundredThousanthMeter(new_margins.footer);
cmm_margins.left = ConvertMilliInchToHundredThousanthMeter(new_margins.left);
cmm_margins.top = ConvertMilliInchToHundredThousanthMeter(new_margins.top);
cmm_margins.right =
ConvertMilliInchToHundredThousanthMeter(new_margins.right);
cmm_margins.bottom =
ConvertMilliInchToHundredThousanthMeter(new_margins.bottom);
UpdateMarginsMetric(cmm_margins);
}
void PrintSettings::RenderParams(ViewMsg_Print_Params* params) const {
DCHECK(params);
params->printable_size.SetSize(page_setup_pixels_.content_area().width(),
page_setup_pixels_.content_area().height());
params->dpi = dpi_;
// Currently hardcoded at 1.25. See PrintSettings' constructor.
params->min_shrink = min_shrink;
// Currently hardcoded at 2.0. See PrintSettings' constructor.
params->max_shrink = max_shrink;
// Currently hardcoded at 72dpi. See PrintSettings' constructor.
params->desired_dpi = desired_dpi;
// Always use an invalid cookie.
params->document_cookie = 0;
}
bool PrintSettings::Equals(const PrintSettings& rhs) const {
// Do not test the display device name (printer_name_) for equality since it
// may sometimes be chopped off at 30 chars. As long as device_name is the
// same, that's fine.
return ranges == rhs.ranges &&
min_shrink == rhs.min_shrink &&
max_shrink == rhs.max_shrink &&
desired_dpi == rhs.desired_dpi &&
overlays.Equals(rhs.overlays) &&
device_name_ == rhs.device_name_ &&
page_setup_pixels_.Equals(rhs.page_setup_pixels_) &&
page_setup_cmm_.Equals(rhs.page_setup_cmm_) &&
dpi_ == rhs.dpi_ &&
landscape_ == rhs.landscape_;
}
int PrintSettings::NewCookie() {
// A cookie of 0 is used to mark a document as unassigned, count from 1.
return cookie_seq.GetNext() + 1;
}
} // namespace printing
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