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/public/isolate_holder.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/proxy/ppb_image_data_proxy.h"
  18 #include "ppapi/shared_impl/var.h"
  19 #include "third_party/icu/source/i18n/unicode/usearch.h"
  20
  21 namespace ppapi {
  22 namespace proxy {
  23
  24 namespace {
  25
  26 // TODO(raymes): This is just copied from render_thread_impl.cc. We should have
  27 // generic code somewhere to get the locale in the plugin.
  28 std::string GetLocale() {
  29   // The browser process should have passed the locale to the plugin via the
  30   // --lang command line flag.
  31   const CommandLine& parsed_command_line = *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     size_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   *count = pp_results.size();
 101   if (*count) {
 102     *results = reinterpret_cast<PP_PrivateFindResult*>(malloc(
 103         *count * sizeof(PP_PrivateFindResult)));
 104     memcpy(*results, &pp_results[0], *count * sizeof(PP_PrivateFindResult));
 105   } else {
 106     *results = NULL;
 107   }
 108
 109   usearch_close(searcher);
 110 }
 111
 112 void PDFResource::DidStartLoading() {
 113   Post(RENDERER, PpapiHostMsg_PDF_DidStartLoading());
 114 }
 115
 116 void PDFResource::DidStopLoading() {
 117   Post(RENDERER, PpapiHostMsg_PDF_DidStopLoading());
 118 }
 119
 120 void PDFResource::SetContentRestriction(int restrictions) {
 121   Post(RENDERER, PpapiHostMsg_PDF_SetContentRestriction(restrictions));
 122 }
 123
 124 void PDFResource::HistogramPDFPageCount(int count) {
 125   UMA_HISTOGRAM_COUNTS_10000("PDF.PageCount", count);
 126 }
 127
 128 void PDFResource::UserMetricsRecordAction(const PP_Var& action) {
 129   scoped_refptr<ppapi::StringVar> action_str(
 130       ppapi::StringVar::FromPPVar(action));
 131   if (action_str.get()) {
 132     Post(RENDERER,
 133          PpapiHostMsg_PDF_UserMetricsRecordAction(action_str->value()));
 134   }
 135 }
 136
 137 void PDFResource::HasUnsupportedFeature() {
 138   Post(RENDERER, PpapiHostMsg_PDF_HasUnsupportedFeature());
 139 }
 140
 141 void PDFResource::Print() {
 142   Post(RENDERER, PpapiHostMsg_PDF_Print());
 143 }
 144
 145 void PDFResource::SaveAs() {
 146   Post(RENDERER, PpapiHostMsg_PDF_SaveAs());
 147 }
 148
 149 PP_Bool PDFResource::IsFeatureEnabled(PP_PDFFeature feature) {
 150   PP_Bool result = PP_FALSE;
 151   switch (feature) {
 152     case PP_PDFFEATURE_HIDPI:
 153       result = PP_TRUE;
 154       break;
 155     case PP_PDFFEATURE_PRINTING:
 156       // TODO(raymes): Use PrintWebViewHelper::IsPrintingEnabled.
 157       result = PP_FALSE;
 158       break;
 159   }
 160   return result;
 161 }
 162
 163 PP_Resource PDFResource::GetResourceImageForScale(PP_ResourceImage image_id,
 164                                                   float scale) {
 165   IPC::Message reply;
 166   ResourceMessageReplyParams reply_params;
 167   int32_t result = GenericSyncCall(
 168       RENDERER, PpapiHostMsg_PDF_GetResourceImage(image_id, scale), &reply,
 169       &reply_params);
 170   if (result != PP_OK)
 171     return 0;
 172
 173   HostResource resource;
 174   PP_ImageDataDesc image_desc;
 175   if (!UnpackMessage<PpapiPluginMsg_PDF_GetResourceImageReply>(
 176       reply, &resource, &image_desc)) {
 177     return 0;
 178   }
 179
 180   if (resource.is_null())
 181     return 0;
 182   if (!PPB_ImageData_Shared::IsImageDataDescValid(image_desc))
 183     return 0;
 184
 185   base::SharedMemoryHandle handle;
 186   if (!reply_params.TakeSharedMemoryHandleAtIndex(0, &handle))
 187     return 0;
 188   return (new SimpleImageData(resource, image_desc, handle))->GetReference();
 189 }
 190
 191 PP_Resource PDFResource::GetResourceImage(PP_ResourceImage image_id) {
 192   return GetResourceImageForScale(image_id, 1.0f);
 193 }
 194
 195 PP_Bool PDFResource::IsOutOfProcess() {
 196   return PP_TRUE;
 197 }
 198
 199 void PDFResource::SetSelectedText(const char* selected_text) {
 200   Post(RENDERER,
 201        PpapiHostMsg_PDF_SetSelectedText(base::UTF8ToUTF16(selected_text)));
 202 }
 203
 204 void PDFResource::SetLinkUnderCursor(const char* url) {
 205   Post(RENDERER, PpapiHostMsg_PDF_SetLinkUnderCursor(url));
 206 }
 207
 208 void PDFResource::GetV8ExternalSnapshotData(const char** natives_data_out,
 209                                             int* natives_size_out,
 210                                             const char** snapshot_data_out,
 211                                             int* snapshot_size_out) {
 212   gin::IsolateHolder::GetV8ExternalSnapshotData(natives_data_out,
 213       natives_size_out, snapshot_data_out, snapshot_size_out);
 214 }
 215
 216 }  // namespace proxy
 217 }  // namespace ppapi