printing/printing_context_android.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/printing_context_android.h"
   6
   7 #include <vector>
   8
   9 #include "base/android/jni_android.h"
  10 #include "base/android/jni_array.h"
  11 #include "base/android/jni_string.h"
  12 #include "base/logging.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/values.h"
  15 #include "jni/PrintingContext_jni.h"
  16 #include "printing/metafile.h"
  17 #include "printing/print_job_constants.h"
  18 #include "printing/units.h"
  19 #include "third_party/icu/source/i18n/unicode/ulocdata.h"
  20
  21 namespace {
  22
  23 // 1 inch in mils.
  24 const int kInchToMil = 1000;
  25
  26 inline int Round(double x) {
  27   return static_cast<int>(x + 0.5);
  28 }
  29
  30 // Sets the page sizes for a |PrintSettings| object.  |width| and |height|
  31 // arguments should be in device units.
  32 void SetSizes(
  33     printing::PrintSettings* settings, int dpi, int width, int height) {
  34   gfx::Size physical_size_device_units(width, height);
  35   // Assume full page is printable for now.
  36   gfx::Rect printable_area_device_units(0, 0, width, height);
  37
  38   settings->set_dpi(dpi);
  39   settings->SetPrinterPrintableArea(physical_size_device_units,
  40                                     printable_area_device_units,
  41                                     false);
  42 }
  43
  44 void GetPageRanges(JNIEnv* env,
  45                    jintArray int_arr,
  46                    printing::PageRanges& range_vector) {
  47   std::vector<int> pages;
  48   base::android::JavaIntArrayToIntVector(env, int_arr, &pages);
  49   for (std::vector<int>::const_iterator it = pages.begin();
  50       it != pages.end();
  51       ++it) {
  52     printing::PageRange range;
  53     range.from = *it;
  54     range.to = *it;
  55     range_vector.push_back(range);
  56   }
  57 }
  58
  59 }  // namespace
  60
  61 namespace printing {
  62
  63 // static
  64 PrintingContext* PrintingContext::Create(const std::string& app_locale) {
  65   return new PrintingContextAndroid(app_locale);
  66 }
  67
  68 // static
  69 void PrintingContextAndroid::PdfWritingDone(int fd, bool success) {
  70   JNIEnv* env = base::android::AttachCurrentThread();
  71   Java_PrintingContext_pdfWritingDone(env, fd, success);
  72 }
  73
  74 PrintingContextAndroid::PrintingContextAndroid(const std::string& app_locale)
  75     : PrintingContext(app_locale) {
  76   // The constructor is run in the IO thread.
  77 }
  78
  79 PrintingContextAndroid::~PrintingContextAndroid() {
  80 }
  81
  82 void PrintingContextAndroid::AskUserForSettings(
  83     gfx::NativeView parent_view,
  84     int max_pages,
  85     bool has_selection,
  86     const PrintSettingsCallback& callback) {
  87   // This method is always run in the UI thread.
  88   callback_ = callback;
  89
  90   JNIEnv* env = base::android::AttachCurrentThread();
  91   if (j_printing_context_.is_null()) {
  92     j_printing_context_.Reset(Java_PrintingContext_create(
  93         env,
  94         reinterpret_cast<intptr_t>(this)));
  95   }
  96
  97   Java_PrintingContext_pageCountEstimationDone(env,
  98                                                j_printing_context_.obj(),
  99                                                max_pages);
 100 }
 101
 102 void PrintingContextAndroid::AskUserForSettingsReply(JNIEnv* env,
 103                                                      jobject obj,
 104                                                      jboolean success) {
 105   if (!success) {
 106     // TODO(cimamoglu): Differentiate between FAILED And CANCEL.
 107     callback_.Run(FAILED);
 108     return;
 109   }
 110
 111   // We use device name variable to store the file descriptor.  This is hacky
 112   // but necessary. Since device name is not necessary for the upstream
 113   // printing code for Android, this is harmless.
 114   int fd = Java_PrintingContext_getFileDescriptor(env,
 115                                                   j_printing_context_.obj());
 116   settings_.set_device_name(base::IntToString16(fd));
 117
 118   ScopedJavaLocalRef<jintArray> intArr =
 119       Java_PrintingContext_getPages(env, j_printing_context_.obj());
 120   if (intArr.obj() != NULL) {
 121     PageRanges range_vector;
 122     GetPageRanges(env, intArr.obj(), range_vector);
 123     settings_.set_ranges(range_vector);
 124   }
 125
 126   int dpi = Java_PrintingContext_getDpi(env, j_printing_context_.obj());
 127   int width = Java_PrintingContext_getWidth(env, j_printing_context_.obj());
 128   int height = Java_PrintingContext_getHeight(env, j_printing_context_.obj());
 129   width = Round(ConvertUnitDouble(width, kInchToMil, 1.0) * dpi);
 130   height = Round(ConvertUnitDouble(height, kInchToMil, 1.0) * dpi);
 131   SetSizes(&settings_, dpi, width, height);
 132
 133   callback_.Run(OK);
 134 }
 135
 136 PrintingContext::Result PrintingContextAndroid::UseDefaultSettings() {
 137   DCHECK(!in_print_job_);
 138
 139   ResetSettings();
 140   settings_.set_dpi(kDefaultPdfDpi);
 141   gfx::Size physical_size = GetPdfPaperSizeDeviceUnits();
 142   SetSizes(&settings_, kDefaultPdfDpi, physical_size.width(),
 143            physical_size.height());
 144   return OK;
 145 }
 146
 147 gfx::Size PrintingContextAndroid::GetPdfPaperSizeDeviceUnits() {
 148   // NOTE: This implementation is the same as in PrintingContextNoSystemDialog.
 149   int32_t width = 0;
 150   int32_t height = 0;
 151   UErrorCode error = U_ZERO_ERROR;
 152   ulocdata_getPaperSize(app_locale_.c_str(), &height, &width, &error);
 153   if (error > U_ZERO_ERROR) {
 154     // If the call failed, assume a paper size of 8.5 x 11 inches.
 155     LOG(WARNING) << "ulocdata_getPaperSize failed, using 8.5 x 11, error: "
 156                  << error;
 157     width = static_cast<int>(
 158         kLetterWidthInch * settings_.device_units_per_inch());
 159     height = static_cast<int>(
 160         kLetterHeightInch  * settings_.device_units_per_inch());
 161   } else {
 162     // ulocdata_getPaperSize returns the width and height in mm.
 163     // Convert this to pixels based on the dpi.
 164     float multiplier = 100 * settings_.device_units_per_inch();
 165     multiplier /= kHundrethsMMPerInch;
 166     width *= multiplier;
 167     height *= multiplier;
 168   }
 169   return gfx::Size(width, height);
 170 }
 171
 172 PrintingContext::Result PrintingContextAndroid::UpdatePrinterSettings(
 173     bool external_preview) {
 174   DCHECK(!in_print_job_);
 175
 176   // Intentional No-op.
 177
 178   return OK;
 179 }
 180
 181 PrintingContext::Result PrintingContextAndroid::InitWithSettings(
 182     const PrintSettings& settings) {
 183   DCHECK(!in_print_job_);
 184
 185   settings_ = settings;
 186
 187   return OK;
 188 }
 189
 190 PrintingContext::Result PrintingContextAndroid::NewDocument(
 191     const base::string16& document_name) {
 192   DCHECK(!in_print_job_);
 193   in_print_job_ = true;
 194
 195   return OK;
 196 }
 197
 198 PrintingContext::Result PrintingContextAndroid::NewPage() {
 199   if (abort_printing_)
 200     return CANCEL;
 201   DCHECK(in_print_job_);
 202
 203   // Intentional No-op.
 204
 205   return OK;
 206 }
 207
 208 PrintingContext::Result PrintingContextAndroid::PageDone() {
 209   if (abort_printing_)
 210     return CANCEL;
 211   DCHECK(in_print_job_);
 212
 213   // Intentional No-op.
 214
 215   return OK;
 216 }
 217
 218 PrintingContext::Result PrintingContextAndroid::DocumentDone() {
 219   if (abort_printing_)
 220     return CANCEL;
 221   DCHECK(in_print_job_);
 222
 223   ResetSettings();
 224   return OK;
 225 }
 226
 227 void PrintingContextAndroid::Cancel() {
 228   abort_printing_ = true;
 229   in_print_job_ = false;
 230 }
 231
 232 void PrintingContextAndroid::ReleaseContext() {
 233   // Intentional No-op.
 234 }
 235
 236 gfx::NativeDrawingContext PrintingContextAndroid::context() const {
 237   // Intentional No-op.
 238   return NULL;
 239 }
 240
 241 // static
 242 bool PrintingContextAndroid::RegisterPrintingContext(JNIEnv* env) {
 243    return RegisterNativesImpl(env);
 244 }
 245
 246 }  // namespace printing