src/ppapi/proxy/pdf_resource.cc

   1 // Copyright (c) 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 "ppapi/proxy/pdf_resource.h"
   6
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 #include "base/command_line.h"
  11 #include "base/metrics/histogram.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "ppapi/c/pp_errors.h"
  14 #include "ppapi/c/private/ppb_pdf.h"
  15 #include "ppapi/proxy/ppapi_messages.h"
  16 #include "ppapi/proxy/ppb_image_data_proxy.h"
  17 #include "ppapi/shared_impl/var.h"
  18 #include "third_party/icu/source/i18n/unicode/usearch.h"
  19
  20 namespace ppapi {
  21 namespace proxy {
  22
  23 namespace {
  24
  25 // TODO(raymes): This is just copied from render_thread_impl.cc. We should have
  26 // generic code somewhere to get the locale in the plugin.
  27 std::string GetLocale() {
  28   // The browser process should have passed the locale to the plugin via the
  29   // --lang command line flag.
  30   const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
  31   const std::string& lang = parsed_command_line.GetSwitchValueASCII("lang");
  32   DCHECK(!lang.empty());
  33   return lang;
  34 }
  35
  36 }  // namespace
  37
  38 PDFResource::PDFResource(Connection connection, PP_Instance instance)
  39     : PluginResource(connection, instance) {
  40   SendCreate(RENDERER, PpapiHostMsg_PDF_Create());
  41 }
  42
  43 PDFResource::~PDFResource() {
  44 }
  45
  46 thunk::PPB_PDF_API* PDFResource::AsPPB_PDF_API() {
  47   return this;
  48 }
  49
  50 PP_Var PDFResource::GetLocalizedString(PP_ResourceString string_id) {
  51   std::string localized_string;
  52   int32_t result = SyncCall<PpapiPluginMsg_PDF_GetLocalizedStringReply>(
  53       RENDERER, PpapiHostMsg_PDF_GetLocalizedString(string_id),
  54       &localized_string);
  55   if (result != PP_OK)
  56     return PP_MakeUndefined();
  57   return ppapi::StringVar::StringToPPVar(localized_string);
  58 }
  59
  60 void PDFResource::SearchString(const unsigned short* input_string,
  61                                const unsigned short* input_term,
  62                                bool case_sensitive,
  63                                PP_PrivateFindResult** results, int* count) {
  64   if (locale_.empty())
  65     locale_ = GetLocale();
  66   const base::char16* string =
  67       reinterpret_cast<const base::char16*>(input_string);
  68   const base::char16* term =
  69       reinterpret_cast<const base::char16*>(input_term);
  70
  71   UErrorCode status = U_ZERO_ERROR;
  72   UStringSearch* searcher = usearch_open(term, -1, string, -1, locale_.c_str(),
  73                                          0, &status);
  74   DCHECK(status == U_ZERO_ERROR || status == U_USING_FALLBACK_WARNING ||
  75          status == U_USING_DEFAULT_WARNING);
  76   UCollationStrength strength = case_sensitive ? UCOL_TERTIARY : UCOL_PRIMARY;
  77
  78   UCollator* collator = usearch_getCollator(searcher);
  79   if (ucol_getStrength(collator) != strength) {
  80     ucol_setStrength(collator, strength);
  81     usearch_reset(searcher);
  82   }
  83
  84   status = U_ZERO_ERROR;
  85   int match_start = usearch_first(searcher, &status);
  86   DCHECK(status == U_ZERO_ERROR);
  87
  88   std::vector<PP_PrivateFindResult> pp_results;
  89   while (match_start != USEARCH_DONE) {
  90     size_t matched_length = usearch_getMatchedLength(searcher);
  91     PP_PrivateFindResult result;
  92     result.start_index = match_start;
  93     result.length = matched_length;
  94     pp_results.push_back(result);
  95     match_start = usearch_next(searcher, &status);
  96     DCHECK(status == U_ZERO_ERROR);
  97   }
  98
  99   *count = pp_results.size();
 100   if (*count) {
 101     *results = reinterpret_cast<PP_PrivateFindResult*>(malloc(
 102         *count * sizeof(PP_PrivateFindResult)));
 103     memcpy(*results, &pp_results[0], *count * sizeof(PP_PrivateFindResult));
 104   } else {
 105     *results = NULL;
 106   }
 107
 108   usearch_close(searcher);
 109 }
 110
 111 void PDFResource::DidStartLoading() {
 112   Post(RENDERER, PpapiHostMsg_PDF_DidStartLoading());
 113 }
 114
 115 void PDFResource::DidStopLoading() {
 116   Post(RENDERER, PpapiHostMsg_PDF_DidStopLoading());
 117 }
 118
 119 void PDFResource::SetContentRestriction(int restrictions) {
 120   Post(RENDERER, PpapiHostMsg_PDF_SetContentRestriction(restrictions));
 121 }
 122
 123 void PDFResource::HistogramPDFPageCount(int count) {
 124   UMA_HISTOGRAM_COUNTS_10000("PDF.PageCount", count);
 125 }
 126
 127 void PDFResource::UserMetricsRecordAction(const PP_Var& action) {
 128   scoped_refptr<ppapi::StringVar> action_str(
 129       ppapi::StringVar::FromPPVar(action));
 130   if (action_str.get()) {
 131     Post(RENDERER,
 132          PpapiHostMsg_PDF_UserMetricsRecordAction(action_str->value()));
 133   }
 134 }
 135
 136 void PDFResource::HasUnsupportedFeature() {
 137   Post(RENDERER, PpapiHostMsg_PDF_HasUnsupportedFeature());
 138 }
 139
 140 void PDFResource::Print() {
 141   Post(RENDERER, PpapiHostMsg_PDF_Print());
 142 }
 143
 144 void PDFResource::SaveAs() {
 145   Post(RENDERER, PpapiHostMsg_PDF_SaveAs());
 146 }
 147
 148 PP_Bool PDFResource::IsFeatureEnabled(PP_PDFFeature feature) {
 149   PP_Bool result = PP_FALSE;
 150   switch (feature) {
 151     case PP_PDFFEATURE_HIDPI:
 152       result = PP_TRUE;
 153       break;
 154     case PP_PDFFEATURE_PRINTING:
 155       // TODO(raymes): Use PrintWebViewHelper::IsPrintingEnabled.
 156       result = PP_FALSE;
 157       break;
 158   }
 159   return result;
 160 }
 161
 162 PP_Resource PDFResource::GetResourceImageForScale(PP_ResourceImage image_id,
 163                                                   float scale) {
 164   IPC::Message reply;
 165   ResourceMessageReplyParams reply_params;
 166   int32_t result = GenericSyncCall(
 167       RENDERER, PpapiHostMsg_PDF_GetResourceImage(image_id, scale), &reply,
 168       &reply_params);
 169   if (result != PP_OK)
 170     return 0;
 171
 172   HostResource resource;
 173   PP_ImageDataDesc image_desc;
 174   if (!UnpackMessage<PpapiPluginMsg_PDF_GetResourceImageReply>(
 175       reply, &resource, &image_desc)) {
 176     return 0;
 177   }
 178
 179   if (resource.is_null())
 180     return 0;
 181   if (!PPB_ImageData_Shared::IsImageDataDescValid(image_desc))
 182     return 0;
 183
 184   base::SharedMemoryHandle handle;
 185   if (!reply_params.TakeSharedMemoryHandleAtIndex(0, &handle))
 186     return 0;
 187   return (new SimpleImageData(resource, image_desc, handle))->GetReference();
 188 }
 189
 190 PP_Resource PDFResource::GetResourceImage(PP_ResourceImage image_id) {
 191   return GetResourceImageForScale(image_id, 1.0f);
 192 }
 193
 194 PP_Bool PDFResource::IsOutOfProcess() {
 195   return PP_TRUE;
 196 }
 197
 198 void PDFResource::SetSelectedText(const char* selected_text) {
 199   Post(RENDERER,
 200        PpapiHostMsg_PDF_SetSelectedText(base::UTF8ToUTF16(selected_text)));
 201 }
 202
 203 }  // namespace proxy
 204 }  // namespace ppapi