src/content/renderer/history_serialization.cc

   1 // Copyright 2014 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 "content/renderer/history_serialization.h"
   6
   7 #include "content/common/page_state_serialization.h"
   8 #include "content/public/common/page_state.h"
   9 #include "content/renderer/history_entry.h"
  10 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  11 #include "third_party/WebKit/public/platform/WebHTTPBody.h"
  12 #include "third_party/WebKit/public/platform/WebPoint.h"
  13 #include "third_party/WebKit/public/platform/WebString.h"
  14 #include "third_party/WebKit/public/platform/WebVector.h"
  15 #include "third_party/WebKit/public/web/WebHistoryItem.h"
  16 #include "third_party/WebKit/public/web/WebSerializedScriptValue.h"
  17
  18 using blink::WebHTTPBody;
  19 using blink::WebHistoryItem;
  20 using blink::WebSerializedScriptValue;
  21 using blink::WebString;
  22 using blink::WebVector;
  23
  24 namespace content {
  25 namespace {
  26
  27 void ToNullableString16Vector(const WebVector<WebString>& input,
  28                               std::vector<base::NullableString16>* output) {
  29   output->reserve(input.size());
  30   for (size_t i = 0; i < input.size(); ++i)
  31     output->push_back(input[i]);
  32 }
  33
  34 void ToExplodedHttpBodyElement(const WebHTTPBody::Element& input,
  35                                ExplodedHttpBodyElement* output) {
  36   switch (input.type) {
  37     case WebHTTPBody::Element::TypeData:
  38       output->data.assign(input.data.data(), input.data.size());
  39       break;
  40     case WebHTTPBody::Element::TypeFile:
  41       output->file_path = input.filePath;
  42       output->file_start = input.fileStart;
  43       output->file_length = input.fileLength;
  44       output->file_modification_time = input.modificationTime;
  45       break;
  46     case WebHTTPBody::Element::TypeFileSystemURL:
  47       output->filesystem_url = input.fileSystemURL;
  48       output->file_start = input.fileStart;
  49       output->file_length = input.fileLength;
  50       output->file_modification_time = input.modificationTime;
  51       break;
  52     case WebHTTPBody::Element::TypeBlob:
  53       output->blob_uuid = input.blobUUID.utf8();
  54       break;
  55   }
  56 }
  57
  58 void AppendHTTPBodyElement(const ExplodedHttpBodyElement& element,
  59                            WebHTTPBody* http_body) {
  60   switch (element.type) {
  61     case WebHTTPBody::Element::TypeData:
  62       http_body->appendData(element.data);
  63       break;
  64     case WebHTTPBody::Element::TypeFile:
  65       http_body->appendFileRange(
  66           element.file_path,
  67           element.file_start,
  68           element.file_length,
  69           element.file_modification_time);
  70       break;
  71     case WebHTTPBody::Element::TypeFileSystemURL:
  72       http_body->appendFileSystemURLRange(
  73           element.filesystem_url,
  74           element.file_start,
  75           element.file_length,
  76           element.file_modification_time);
  77       break;
  78     case WebHTTPBody::Element::TypeBlob:
  79       http_body->appendBlob(WebString::fromUTF8(element.blob_uuid));
  80       break;
  81   }
  82 }
  83
  84 void GenerateFrameStateFromItem(const WebHistoryItem& item,
  85                                 ExplodedFrameState* state) {
  86   state->url_string = item.urlString();
  87   state->referrer = item.referrer();
  88   state->referrer_policy = item.referrerPolicy();
  89   state->target = item.target();
  90   if (!item.stateObject().isNull())
  91     state->state_object = item.stateObject().toString();
  92   state->pinch_viewport_scroll_offset = item.pinchViewportScrollOffset();
  93   state->scroll_offset = item.scrollOffset();
  94   state->item_sequence_number = item.itemSequenceNumber();
  95   state->document_sequence_number =
  96       item.documentSequenceNumber();
  97   state->frame_sequence_number =
  98       item.frameSequenceNumber();
  99   state->page_scale_factor = item.pageScaleFactor();
 100   ToNullableString16Vector(item.documentState(), &state->document_state);
 101
 102   state->http_body.http_content_type = item.httpContentType();
 103   const WebHTTPBody& http_body = item.httpBody();
 104   state->http_body.is_null = http_body.isNull();
 105   if (!state->http_body.is_null) {
 106     state->http_body.identifier = http_body.identifier();
 107     state->http_body.elements.resize(http_body.elementCount());
 108     for (size_t i = 0; i < http_body.elementCount(); ++i) {
 109       WebHTTPBody::Element element;
 110       http_body.elementAt(i, element);
 111       ToExplodedHttpBodyElement(element, &state->http_body.elements[i]);
 112     }
 113     state->http_body.contains_passwords = http_body.containsPasswordData();
 114   }
 115 }
 116
 117 void RecursivelyGenerateFrameState(HistoryEntry::HistoryNode* node,
 118                                    ExplodedFrameState* state) {
 119   GenerateFrameStateFromItem(node->item(), state);
 120
 121   std::vector<HistoryEntry::HistoryNode*>& children = node->children();
 122   state->children.resize(children.size());
 123   for (size_t i = 0; i < children.size(); ++i)
 124     RecursivelyGenerateFrameState(children[i], &state->children[i]);
 125 }
 126
 127 void RecursivelyGenerateHistoryItem(const ExplodedFrameState& state,
 128                                     HistoryEntry::HistoryNode* node) {
 129   WebHistoryItem item;
 130   item.initialize();
 131   item.setURLString(state.url_string);
 132   item.setReferrer(state.referrer, state.referrer_policy);
 133   item.setTarget(state.target);
 134   if (!state.state_object.is_null()) {
 135     item.setStateObject(
 136         WebSerializedScriptValue::fromString(state.state_object));
 137   }
 138   item.setDocumentState(state.document_state);
 139   item.setPinchViewportScrollOffset(state.pinch_viewport_scroll_offset);
 140   item.setScrollOffset(state.scroll_offset);
 141   item.setPageScaleFactor(state.page_scale_factor);
 142
 143   // These values are generated at WebHistoryItem construction time, and we
 144   // only want to override those new values with old values if the old values
 145   // are defined.  A value of 0 means undefined in this context.
 146   if (state.item_sequence_number)
 147     item.setItemSequenceNumber(state.item_sequence_number);
 148   if (state.document_sequence_number)
 149     item.setDocumentSequenceNumber(state.document_sequence_number);
 150   if (state.frame_sequence_number)
 151     item.setFrameSequenceNumber(state.frame_sequence_number);
 152
 153   item.setHTTPContentType(state.http_body.http_content_type);
 154   if (!state.http_body.is_null) {
 155     WebHTTPBody http_body;
 156     http_body.initialize();
 157     http_body.setIdentifier(state.http_body.identifier);
 158     for (size_t i = 0; i < state.http_body.elements.size(); ++i)
 159       AppendHTTPBodyElement(state.http_body.elements[i], &http_body);
 160     item.setHTTPBody(http_body);
 161   }
 162   node->set_item(item);
 163
 164   for (size_t i = 0; i < state.children.size(); ++i)
 165     RecursivelyGenerateHistoryItem(state.children[i], node->AddChild());
 166 }
 167
 168 }  // namespace
 169
 170 PageState HistoryEntryToPageState(HistoryEntry* entry) {
 171   ExplodedPageState state;
 172   ToNullableString16Vector(entry->root().getReferencedFilePaths(),
 173                            &state.referenced_files);
 174
 175   RecursivelyGenerateFrameState(entry->root_history_node(), &state.top);
 176
 177   std::string encoded_data;
 178   if (!EncodePageState(state, &encoded_data))
 179     return PageState();
 180
 181   return PageState::CreateFromEncodedData(encoded_data);
 182 }
 183
 184 PageState SingleHistoryItemToPageState(const WebHistoryItem& item) {
 185   ExplodedPageState state;
 186   ToNullableString16Vector(item.getReferencedFilePaths(),
 187                            &state.referenced_files);
 188   GenerateFrameStateFromItem(item, &state.top);
 189
 190   std::string encoded_data;
 191   if (!EncodePageState(state, &encoded_data))
 192     return PageState();
 193
 194   return PageState::CreateFromEncodedData(encoded_data);
 195 }
 196
 197 scoped_ptr<HistoryEntry> PageStateToHistoryEntry(const PageState& page_state) {
 198   ExplodedPageState state;
 199   if (!DecodePageState(page_state.ToEncodedData(), &state))
 200     return scoped_ptr<HistoryEntry>();
 201
 202   scoped_ptr<HistoryEntry> entry(new HistoryEntry());
 203   RecursivelyGenerateHistoryItem(state.top, entry->root_history_node());
 204
 205   return entry.Pass();
 206 }
 207
 208 }  // namespace content