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     bool is_scripted,
  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   if (is_scripted) {
  98     Java_PrintingContext_showPrintDialog(env, j_printing_context_.obj());
  99   } else {
 100     Java_PrintingContext_pageCountEstimationDone(env,
 101                                                  j_printing_context_.obj(),
 102                                                  max_pages);
 103   }
 104 }
 105
 106 void PrintingContextAndroid::AskUserForSettingsReply(JNIEnv* env,
 107                                                      jobject obj,
 108                                                      jboolean success) {
 109   if (!success) {
 110     // TODO(cimamoglu): Differentiate between FAILED And CANCEL.
 111     callback_.Run(FAILED);
 112     return;
 113   }
 114
 115   // We use device name variable to store the file descriptor.  This is hacky
 116   // but necessary. Since device name is not necessary for the upstream
 117   // printing code for Android, this is harmless.
 118   int fd = Java_PrintingContext_getFileDescriptor(env,
 119                                                   j_printing_context_.obj());
 120   settings_.set_device_name(base::IntToString16(fd));
 121
 122   ScopedJavaLocalRef<jintArray> intArr =
 123       Java_PrintingContext_getPages(env, j_printing_context_.obj());
 124   if (intArr.obj() != NULL) {
 125     PageRanges range_vector;
 126     GetPageRanges(env, intArr.obj(), range_vector);
 127     settings_.set_ranges(range_vector);
 128   }
 129
 130   int dpi = Java_PrintingContext_getDpi(env, j_printing_context_.obj());
 131   int width = Java_PrintingContext_getWidth(env, j_printing_context_.obj());
 132   int height = Java_PrintingContext_getHeight(env, j_printing_context_.obj());
 133   width = Round(ConvertUnitDouble(width, kInchToMil, 1.0) * dpi);
 134   height = Round(ConvertUnitDouble(height, kInchToMil, 1.0) * dpi);
 135   SetSizes(&settings_, dpi, width, height);
 136
 137   callback_.Run(OK);
 138 }
 139
 140 void PrintingContextAndroid::ShowSystemDialogDone(JNIEnv* env,
 141                                                   jobject obj) {
 142   // Settings are not updated, callback is called only to unblock javascript.
 143   callback_.Run(CANCEL);
 144 }
 145
 146 PrintingContext::Result PrintingContextAndroid::UseDefaultSettings() {
 147   DCHECK(!in_print_job_);
 148
 149   ResetSettings();
 150   settings_.set_dpi(kDefaultPdfDpi);
 151   gfx::Size physical_size = GetPdfPaperSizeDeviceUnits();
 152   SetSizes(&settings_, kDefaultPdfDpi, physical_size.width(),
 153            physical_size.height());
 154   return OK;
 155 }
 156
 157 gfx::Size PrintingContextAndroid::GetPdfPaperSizeDeviceUnits() {
 158   // NOTE: This implementation is the same as in PrintingContextNoSystemDialog.
 159   int32_t width = 0;
 160   int32_t height = 0;
 161   UErrorCode error = U_ZERO_ERROR;
 162   ulocdata_getPaperSize(
 163       delegate_->GetAppLocale().c_str(), &height, &width, &error);
 164   if (error > U_ZERO_ERROR) {
 165     // If the call failed, assume a paper size of 8.5 x 11 inches.
 166     LOG(WARNING) << "ulocdata_getPaperSize failed, using 8.5 x 11, error: "
 167                  << error;
 168     width = static_cast<int>(
 169         kLetterWidthInch * settings_.device_units_per_inch());
 170     height = static_cast<int>(
 171         kLetterHeightInch  * settings_.device_units_per_inch());
 172   } else {
 173     // ulocdata_getPaperSize returns the width and height in mm.
 174     // Convert this to pixels based on the dpi.
 175     float multiplier = 100 * settings_.device_units_per_inch();
 176     multiplier /= kHundrethsMMPerInch;
 177     width *= multiplier;
 178     height *= multiplier;
 179   }
 180   return gfx::Size(width, height);
 181 }
 182
 183 PrintingContext::Result PrintingContextAndroid::UpdatePrinterSettings(
 184     bool external_preview,
 185     bool show_system_dialog) {
 186   DCHECK(!show_system_dialog);
 187   DCHECK(!in_print_job_);
 188
 189   // Intentional No-op.
 190
 191   return OK;
 192 }
 193
 194 PrintingContext::Result PrintingContextAndroid::InitWithSettings(
 195     const PrintSettings& settings) {
 196   DCHECK(!in_print_job_);
 197
 198   settings_ = settings;
 199
 200   return OK;
 201 }
 202
 203 PrintingContext::Result PrintingContextAndroid::NewDocument(
 204     const base::string16& document_name) {
 205   DCHECK(!in_print_job_);
 206   in_print_job_ = true;
 207
 208   return OK;
 209 }
 210
 211 PrintingContext::Result PrintingContextAndroid::NewPage() {
 212   if (abort_printing_)
 213     return CANCEL;
 214   DCHECK(in_print_job_);
 215
 216   // Intentional No-op.
 217
 218   return OK;
 219 }
 220
 221 PrintingContext::Result PrintingContextAndroid::PageDone() {
 222   if (abort_printing_)
 223     return CANCEL;
 224   DCHECK(in_print_job_);
 225
 226   // Intentional No-op.
 227
 228   return OK;
 229 }
 230
 231 PrintingContext::Result PrintingContextAndroid::DocumentDone() {
 232   if (abort_printing_)
 233     return CANCEL;
 234   DCHECK(in_print_job_);
 235
 236   ResetSettings();
 237   return OK;
 238 }
 239
 240 void PrintingContextAndroid::Cancel() {
 241   abort_printing_ = true;
 242   in_print_job_ = false;
 243 }
 244
 245 void PrintingContextAndroid::ReleaseContext() {
 246   // Intentional No-op.
 247 }
 248
 249 gfx::NativeDrawingContext PrintingContextAndroid::context() const {
 250   // Intentional No-op.
 251   return NULL;
 252 }
 253
 254 // static
 255 bool PrintingContextAndroid::RegisterPrintingContext(JNIEnv* env) {
 256    return RegisterNativesImpl(env);
 257 }
 258
 259 }  // namespace printing