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 "gin/v8_initializer.h"
  14 #include "ppapi/c/pp_errors.h"
  15 #include "ppapi/c/private/ppb_pdf.h"
  16 #include "ppapi/proxy/ppapi_messages.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 base::CommandLine& parsed_command_line =
  31       *base::CommandLine::ForCurrentProcess();
  32   const std::string& lang = parsed_command_line.GetSwitchValueASCII("lang");
  33   DCHECK(!lang.empty());
  34   return lang;
  35 }
  36
  37 }  // namespace
  38
  39 PDFResource::PDFResource(Connection connection, PP_Instance instance)
  40     : PluginResource(connection, instance) {
  41   SendCreate(RENDERER, PpapiHostMsg_PDF_Create());
  42 }
  43
  44 PDFResource::~PDFResource() {
  45 }
  46
  47 thunk::PPB_PDF_API* PDFResource::AsPPB_PDF_API() {
  48   return this;
  49 }
  50
  51 PP_Var PDFResource::GetLocalizedString(PP_ResourceString string_id) {
  52   std::string localized_string;
  53   int32_t result = SyncCall<PpapiPluginMsg_PDF_GetLocalizedStringReply>(
  54       RENDERER, PpapiHostMsg_PDF_GetLocalizedString(string_id),
  55       &localized_string);
  56   if (result != PP_OK)
  57     return PP_MakeUndefined();
  58   return ppapi::StringVar::StringToPPVar(localized_string);
  59 }
  60
  61 void PDFResource::SearchString(const unsigned short* input_string,
  62                                const unsigned short* input_term,
  63                                bool case_sensitive,
  64                                PP_PrivateFindResult** results, int* count) {
  65   if (locale_.empty())
  66     locale_ = GetLocale();
  67   const base::char16* string =
  68       reinterpret_cast<const base::char16*>(input_string);
  69   const base::char16* term =
  70       reinterpret_cast<const base::char16*>(input_term);
  71
  72   UErrorCode status = U_ZERO_ERROR;
  73   UStringSearch* searcher = usearch_open(term, -1, string, -1, locale_.c_str(),
  74                                          0, &status);
  75   DCHECK(status == U_ZERO_ERROR || status == U_USING_FALLBACK_WARNING ||
  76          status == U_USING_DEFAULT_WARNING);
  77   UCollationStrength strength = case_sensitive ? UCOL_TERTIARY : UCOL_PRIMARY;
  78
  79   UCollator* collator = usearch_getCollator(searcher);
  80   if (ucol_getStrength(collator) != strength) {
  81     ucol_setStrength(collator, strength);
  82     usearch_reset(searcher);
  83   }
  84
  85   status = U_ZERO_ERROR;
  86   int match_start = usearch_first(searcher, &status);
  87   DCHECK(status == U_ZERO_ERROR);
  88
  89   std::vector<PP_PrivateFindResult> pp_results;
  90   while (match_start != USEARCH_DONE) {
  91     int32_t matched_length = usearch_getMatchedLength(searcher);
  92     PP_PrivateFindResult result;
  93     result.start_index = match_start;
  94     result.length = matched_length;
  95     pp_results.push_back(result);
  96     match_start = usearch_next(searcher, &status);
  97     DCHECK(status == U_ZERO_ERROR);
  98   }
  99
 100   if (pp_results.empty() ||
 101       pp_results.size() > std::numeric_limits<uint32_t>::max() ||
 102       pp_results.size() > SIZE_MAX / sizeof(PP_PrivateFindResult)) {
 103     *count = 0;
 104     *results = nullptr;
 105   } else {
 106     *count = static_cast<uint32_t>(pp_results.size());
 107     const size_t result_size = pp_results.size() * sizeof(PP_PrivateFindResult);
 108     *results = reinterpret_cast<PP_PrivateFindResult*>(malloc(result_size));
 109     memcpy(*results, &pp_results[0], result_size);
 110   }
 111
 112   usearch_close(searcher);
 113 }
 114
 115 void PDFResource::DidStartLoading() {
 116   Post(RENDERER, PpapiHostMsg_PDF_DidStartLoading());
 117 }
 118
 119 void PDFResource::DidStopLoading() {
 120   Post(RENDERER, PpapiHostMsg_PDF_DidStopLoading());
 121 }
 122
 123 void PDFResource::SetContentRestriction(int restrictions) {
 124   Post(RENDERER, PpapiHostMsg_PDF_SetContentRestriction(restrictions));
 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 void PDFResource::SetSelectedText(const char* selected_text) {
 163   Post(RENDERER,
 164        PpapiHostMsg_PDF_SetSelectedText(base::UTF8ToUTF16(selected_text)));
 165 }
 166
 167 void PDFResource::SetLinkUnderCursor(const char* url) {
 168   Post(RENDERER, PpapiHostMsg_PDF_SetLinkUnderCursor(url));
 169 }
 170
 171 void PDFResource::GetV8ExternalSnapshotData(const char** natives_data_out,
 172                                             int* natives_size_out,
 173                                             const char** snapshot_data_out,
 174                                             int* snapshot_size_out) {
 175   gin::V8Initializer::GetV8ExternalSnapshotData(
 176       natives_data_out, natives_size_out, snapshot_data_out, snapshot_size_out);
 177 }
 178
 179 }  // namespace proxy
 180 }  // namespace ppapi