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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/history_serialization.h"
#include <stddef.h>
#include "base/strings/nullable_string16.h"
#include "content/child/web_url_request_util.h"
#include "content/common/page_state_serialization.h"
#include "content/public/common/page_state.h"
#include "content/renderer/history_entry.h"
#include "third_party/WebKit/public/platform/WebData.h"
#include "third_party/WebKit/public/platform/WebFloatPoint.h"
#include "third_party/WebKit/public/platform/WebHTTPBody.h"
#include "third_party/WebKit/public/platform/WebPoint.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebVector.h"
#include "third_party/WebKit/public/web/WebHistoryItem.h"
#include "third_party/WebKit/public/web/WebSerializedScriptValue.h"
using blink::WebData;
using blink::WebHTTPBody;
using blink::WebHistoryItem;
using blink::WebSerializedScriptValue;
using blink::WebString;
using blink::WebVector;
namespace content {
namespace {
void ToNullableString16Vector(const WebVector<WebString>& input,
std::vector<base::NullableString16>* output) {
output->reserve(output->size() + input.size());
for (size_t i = 0; i < input.size(); ++i)
output->push_back(WebString::ToNullableString16(input[i]));
}
void GenerateFrameStateFromItem(const WebHistoryItem& item,
ExplodedFrameState* state) {
state->url_string = WebString::ToNullableString16(item.UrlString());
state->referrer = WebString::ToNullableString16(item.GetReferrer());
state->referrer_policy = item.GetReferrerPolicy();
state->target = WebString::ToNullableString16(item.Target());
if (!item.StateObject().IsNull()) {
state->state_object =
WebString::ToNullableString16(item.StateObject().ToString());
}
state->scroll_restoration_type = item.ScrollRestorationType();
state->visual_viewport_scroll_offset = item.VisualViewportScrollOffset();
state->scroll_offset = item.GetScrollOffset();
state->item_sequence_number = item.ItemSequenceNumber();
state->document_sequence_number = item.DocumentSequenceNumber();
state->page_scale_factor = item.PageScaleFactor();
state->did_save_scroll_or_scale_state = item.DidSaveScrollOrScaleState();
ToNullableString16Vector(item.GetDocumentState(), &state->document_state);
state->http_body.http_content_type =
WebString::ToNullableString16(item.HttpContentType());
const WebHTTPBody& http_body = item.HttpBody();
if (!http_body.IsNull()) {
state->http_body.request_body = GetRequestBodyForWebHTTPBody(http_body);
state->http_body.contains_passwords = http_body.ContainsPasswordData();
}
}
void RecursivelyGenerateFrameState(
HistoryEntry::HistoryNode* node,
ExplodedFrameState* state,
std::vector<base::NullableString16>* referenced_files) {
GenerateFrameStateFromItem(node->item(), state);
ToNullableString16Vector(node->item().GetReferencedFilePaths(),
referenced_files);
std::vector<HistoryEntry::HistoryNode*> children = node->children();
state->children.resize(children.size());
for (size_t i = 0; i < children.size(); ++i) {
RecursivelyGenerateFrameState(children[i], &state->children[i],
referenced_files);
}
}
void RecursivelyGenerateHistoryItem(const ExplodedFrameState& state,
HistoryEntry::HistoryNode* node) {
WebHistoryItem item;
item.Initialize();
item.SetURLString(WebString::FromUTF16(state.url_string));
item.SetReferrer(WebString::FromUTF16(state.referrer), state.referrer_policy);
item.SetTarget(WebString::FromUTF16(state.target));
if (!state.state_object.is_null()) {
item.SetStateObject(WebSerializedScriptValue::FromString(
WebString::FromUTF16(state.state_object)));
}
WebVector<WebString> document_state(state.document_state.size());
std::transform(state.document_state.begin(), state.document_state.end(),
document_state.begin(), [](const base::NullableString16& s) {
return WebString::FromUTF16(s);
});
item.SetDocumentState(document_state);
item.SetScrollRestorationType(state.scroll_restoration_type);
item.SetVisualViewportScrollOffset(state.visual_viewport_scroll_offset);
item.SetScrollOffset(state.scroll_offset);
item.SetPageScaleFactor(state.page_scale_factor);
item.SetDidSaveScrollOrScaleState(state.did_save_scroll_or_scale_state);
// These values are generated at WebHistoryItem construction time, and we
// only want to override those new values with old values if the old values
// are defined. A value of 0 means undefined in this context.
if (state.item_sequence_number)
item.SetItemSequenceNumber(state.item_sequence_number);
if (state.document_sequence_number)
item.SetDocumentSequenceNumber(state.document_sequence_number);
item.SetHTTPContentType(
WebString::FromUTF16(state.http_body.http_content_type));
if (state.http_body.request_body != nullptr) {
item.SetHTTPBody(
GetWebHTTPBodyForRequestBody(state.http_body.request_body));
}
node->set_item(item);
for (size_t i = 0; i < state.children.size(); ++i)
RecursivelyGenerateHistoryItem(state.children[i], node->AddChild());
}
} // namespace
PageState HistoryEntryToPageState(HistoryEntry* entry) {
ExplodedPageState state;
RecursivelyGenerateFrameState(entry->root_history_node(), &state.top,
&state.referenced_files);
std::string encoded_data;
EncodePageState(state, &encoded_data);
return PageState::CreateFromEncodedData(encoded_data);
}
PageState SingleHistoryItemToPageState(const WebHistoryItem& item) {
ExplodedPageState state;
ToNullableString16Vector(item.GetReferencedFilePaths(),
&state.referenced_files);
GenerateFrameStateFromItem(item, &state.top);
std::string encoded_data;
EncodePageState(state, &encoded_data);
return PageState::CreateFromEncodedData(encoded_data);
}
std::unique_ptr<HistoryEntry> PageStateToHistoryEntry(
const PageState& page_state) {
ExplodedPageState state;
if (!DecodePageState(page_state.ToEncodedData(), &state))
return std::unique_ptr<HistoryEntry>();
std::unique_ptr<HistoryEntry> entry(new HistoryEntry());
RecursivelyGenerateHistoryItem(state.top, entry->root_history_node());
return entry;
}
} // namespace content
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