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 scoped_ptr<PrintingContext> PrintingContext::Create(Delegate* delegate) {
  65   return make_scoped_ptr<PrintingContext>(new PrintingContextAndroid(delegate));
  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(Delegate* delegate)
  75     : PrintingContext(delegate) {
  76   // The constructor is run in the IO thread.
  77 }
  78
  79 PrintingContextAndroid::~PrintingContextAndroid() {
  80 }
  81
  82 void PrintingContextAndroid::AskUserForSettings(
  83     int max_pages,
  84     bool has_selection,
  85     const PrintSettingsCallback& callback) {
  86   // This method is always run in the UI thread.
  87   callback_ = callback;
  88
  89   JNIEnv* env = base::android::AttachCurrentThread();
  90   if (j_printing_context_.is_null()) {
  91     j_printing_context_.Reset(Java_PrintingContext_create(
  92         env,
  93         reinterpret_cast<intptr_t>(this)));
  94   }
  95
  96   Java_PrintingContext_pageCountEstimationDone(env,
  97                                                j_printing_context_.obj(),
  98                                                max_pages);
  99 }
 100
 101 void PrintingContextAndroid::AskUserForSettingsReply(JNIEnv* env,
 102                                                      jobject obj,
 103                                                      jboolean success) {
 104   if (!success) {
 105     // TODO(cimamoglu): Differentiate between FAILED And CANCEL.
 106     callback_.Run(FAILED);
 107     return;
 108   }
 109
 110   // We use device name variable to store the file descriptor.  This is hacky
 111   // but necessary. Since device name is not necessary for the upstream
 112   // printing code for Android, this is harmless.
 113   int fd = Java_PrintingContext_getFileDescriptor(env,
 114                                                   j_printing_context_.obj());
 115   settings_.set_device_name(base::IntToString16(fd));
 116
 117   ScopedJavaLocalRef<jintArray> intArr =
 118       Java_PrintingContext_getPages(env, j_printing_context_.obj());
 119   if (intArr.obj() != NULL) {
 120     PageRanges range_vector;
 121     GetPageRanges(env, intArr.obj(), range_vector);
 122     settings_.set_ranges(range_vector);
 123   }
 124
 125   int dpi = Java_PrintingContext_getDpi(env, j_printing_context_.obj());
 126   int width = Java_PrintingContext_getWidth(env, j_printing_context_.obj());
 127   int height = Java_PrintingContext_getHeight(env, j_printing_context_.obj());
 128   width = Round(ConvertUnitDouble(width, kInchToMil, 1.0) * dpi);
 129   height = Round(ConvertUnitDouble(height, kInchToMil, 1.0) * dpi);
 130   SetSizes(&settings_, dpi, width, height);
 131
 132   callback_.Run(OK);
 133 }
 134
 135 PrintingContext::Result PrintingContextAndroid::UseDefaultSettings() {
 136   DCHECK(!in_print_job_);
 137
 138   ResetSettings();
 139   settings_.set_dpi(kDefaultPdfDpi);
 140   gfx::Size physical_size = GetPdfPaperSizeDeviceUnits();
 141   SetSizes(&settings_, kDefaultPdfDpi, physical_size.width(),
 142            physical_size.height());
 143   return OK;
 144 }
 145
 146 gfx::Size PrintingContextAndroid::GetPdfPaperSizeDeviceUnits() {
 147   // NOTE: This implementation is the same as in PrintingContextNoSystemDialog.
 148   int32_t width = 0;
 149   int32_t height = 0;
 150   UErrorCode error = U_ZERO_ERROR;
 151   ulocdata_getPaperSize(
 152       delegate_->GetAppLocale().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     bool show_system_dialog) {
 175   DCHECK(!show_system_dialog);
 176   DCHECK(!in_print_job_);
 177
 178   // Intentional No-op.
 179
 180   return OK;
 181 }
 182
 183 PrintingContext::Result PrintingContextAndroid::InitWithSettings(
 184     const PrintSettings& settings) {
 185   DCHECK(!in_print_job_);
 186
 187   settings_ = settings;
 188
 189   return OK;
 190 }
 191
 192 PrintingContext::Result PrintingContextAndroid::NewDocument(
 193     const base::string16& document_name) {
 194   DCHECK(!in_print_job_);
 195   in_print_job_ = true;
 196
 197   return OK;
 198 }
 199
 200 PrintingContext::Result PrintingContextAndroid::NewPage() {
 201   if (abort_printing_)
 202     return CANCEL;
 203   DCHECK(in_print_job_);
 204
 205   // Intentional No-op.
 206
 207   return OK;
 208 }
 209
 210 PrintingContext::Result PrintingContextAndroid::PageDone() {
 211   if (abort_printing_)
 212     return CANCEL;
 213   DCHECK(in_print_job_);
 214
 215   // Intentional No-op.
 216
 217   return OK;
 218 }
 219
 220 PrintingContext::Result PrintingContextAndroid::DocumentDone() {
 221   if (abort_printing_)
 222     return CANCEL;
 223   DCHECK(in_print_job_);
 224
 225   ResetSettings();
 226   return OK;
 227 }
 228
 229 void PrintingContextAndroid::Cancel() {
 230   abort_printing_ = true;
 231   in_print_job_ = false;
 232 }
 233
 234 void PrintingContextAndroid::ReleaseContext() {
 235   // Intentional No-op.
 236 }
 237
 238 gfx::NativeDrawingContext PrintingContextAndroid::context() const {
 239   // Intentional No-op.
 240   return NULL;
 241 }
 242
 243 // static
 244 bool PrintingContextAndroid::RegisterPrintingContext(JNIEnv* env) {
 245    return RegisterNativesImpl(env);
 246 }
 247
 248 }  // namespace printing