printing_utils.cc | Explore in Territory

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "printing/printing_utils.h"

#include <algorithm>
#include <cstring>
#include <string>
#include <string_view>

#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "printing/mojom/print.mojom.h"
#include "third_party/icu/source/common/unicode/uchar.h"
#include "ui/gfx/text_elider.h"

#if BUILDFLAG(USE_CUPS)
#include <unicode/ulocdata.h>

#include <cmath>

#include "printing/units.h"
#include "ui/gfx/geometry/size.h"
#endif

#if BUILDFLAG(IS_WIN)
#include <windows.h>

#include "printing/printing_features.h"
#endif

namespace printing {

namespace {

constexpr size_t kMaxDocumentTitleLength = …;

#if BUILDFLAG(USE_CUPS)
constexpr gfx::Size kIsoA4Microns = …;
#endif

}  // namespace

std::u16string SimplifyDocumentTitleWithLength(const std::u16string& title,
                                               size_t length) { … }

std::u16string FormatDocumentTitleWithOwnerAndLength(
    const std::u16string& owner,
    const std::u16string& title,
    size_t length) { … }

std::u16string SimplifyDocumentTitle(const std::u16string& title) { … }

std::u16string FormatDocumentTitleWithOwner(const std::u16string& owner,
                                            const std::u16string& title) { … }

#if BUILDFLAG(USE_CUPS)
gfx::Size GetDefaultPaperSizeFromLocaleMicrons(std::string_view locale) { … }

bool SizesEqualWithinEpsilon(const gfx::Size& lhs,
                             const gfx::Size& rhs,
                             int epsilon) { … }
#endif  // BUILDFLAG(USE_CUPS)

#if BUILDFLAG(IS_WIN)
gfx::Rect GetCenteredPageContentRect(const gfx::Size& paper_size,
                                     const gfx::Size& page_size,
                                     const gfx::Rect& page_content_rect) {
  gfx::Rect content_rect = page_content_rect;
  if (paper_size.width() > page_size.width()) {
    int diff = paper_size.width() - page_size.width();
    content_rect.set_x(content_rect.x() + diff / 2);
  }
  if (paper_size.height() > page_size.height()) {
    int diff = paper_size.height() - page_size.height();
    content_rect.set_y(content_rect.y() + diff / 2);
  }
  return content_rect;
}

gfx::Rect GetPrintableAreaDeviceUnits(HDC hdc) {
  DCHECK(hdc);

  gfx::Size physical_size_device_units(GetDeviceCaps(hdc, PHYSICALWIDTH),
                                       GetDeviceCaps(hdc, PHYSICALHEIGHT));
  gfx::Rect printable_area_device_units(
      GetDeviceCaps(hdc, PHYSICALOFFSETX), GetDeviceCaps(hdc, PHYSICALOFFSETY),
      GetDeviceCaps(hdc, HORZRES), GetDeviceCaps(hdc, VERTRES));

  // Sanity check the printable_area: we've seen crashes caused by a printable
  // area rect of 0, 0, 0, 0, so it seems some drivers don't set it.
  if (printable_area_device_units.IsEmpty() ||
      !gfx::Rect(physical_size_device_units)
           .Contains(printable_area_device_units)) {
    printable_area_device_units = gfx::Rect(physical_size_device_units);
  }

  return printable_area_device_units;
}

DocumentDataType DetermineDocumentDataType(base::span<const uint8_t> data) {
  if (LooksLikePdf(data)) {
    return DocumentDataType::kPdf;
  }
  if (LooksLikeXps(data)) {
    return DocumentDataType::kXps;
  }
  return DocumentDataType::kUnknown;
}

bool LooksLikeXps(base::span<const uint8_t> maybe_xps_data) {
  constexpr auto kXpsStartsWith = base::span_from_cstring("PK\x03\x04");
  return maybe_xps_data.size() >= 2000u &&
         maybe_xps_data.first(kXpsStartsWith.size()) == kXpsStartsWith;
}
#endif  // BUILDFLAG(IS_WIN)

bool LooksLikePdf(base::span<const uint8_t> maybe_pdf_data) { … }

}  // namespace printing
chromium/printing/printing_utils.cc
