[Sheriff] Revert "Revert "Revert 266297 "1. Handle the case of empty embedder_extension_id..."""

chrome/browser/guest_view/web_view/web_view_find_helper.cc

-// 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 "chrome/browser/guest_view/web_view/web_view_find_helper.h"
-
-#include <utility>
-
-#include "chrome/browser/extensions/api/webview/webview_api.h"
-#include "chrome/browser/guest_view/web_view/web_view_constants.h"
-
-WebviewFindHelper::WebviewFindHelper(WebViewGuest* webview_guest)
-    : webview_guest_(webview_guest),
-      current_find_request_id_(0) {
-}
-
-WebviewFindHelper::~WebviewFindHelper() {
-}
-
-void WebviewFindHelper::CancelAllFindSessions() {
-  current_find_session_ = linked_ptr<WebviewFindHelper::FindInfo>();
-  while (!find_info_map_.empty()) {
-    find_info_map_.begin()->second->SendResponse(true /* canceled */);
-    find_info_map_.erase(find_info_map_.begin());
-  }
-  if (find_update_event_.get())
-    DispatchFindUpdateEvent(true /* canceled */, true /* final_update */);
-  find_update_event_.reset();
-}
-
-void WebviewFindHelper::DispatchFindUpdateEvent(bool canceled,
-                                                bool final_update) {
-  DCHECK(find_update_event_.get());
-  scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
-  find_update_event_->PrepareResults(args.get());
-  args->SetBoolean(webview::kFindCanceled, canceled);
-  args->SetBoolean(webview::kFindFinalUpdate, final_update);
-  DCHECK(webview_guest_);
-  webview_guest_->DispatchEvent(
-      new GuestViewBase::Event(webview::kEventFindReply, args.Pass()));
-}
-
-void WebviewFindHelper::EndFindSession(int session_request_id, bool canceled) {
-  FindInfoMap::iterator session_iterator =
-      find_info_map_.find(session_request_id);
-  DCHECK(session_iterator != find_info_map_.end());
-  FindInfo* find_info = session_iterator->second.get();
-
-  // Call the callback function of the first request of the find session.
-  find_info->SendResponse(canceled);
-
-  // For every subsequent find request of the find session.
-  for (std::vector<base::WeakPtr<WebviewFindHelper::FindInfo> >::iterator i =
-           find_info->find_next_requests_.begin();
-       i != find_info->find_next_requests_.end(); ++i) {
-    DCHECK(i->get());
-
-    // Do not call callbacks for subsequent find requests that have not been
-    // replied to yet. These requests will get their own final updates in the
-    // same order as they appear in |find_next_requests_|, i.e. the order that
-    // the requests were made in. Once one request is found that has not been
-    // replied to, none that follow will be replied to either, and do not need
-    // to be checked.
-    if (!(*i)->replied_)
-      break;
-
-    // Update the request's number of matches (if not canceled).
-    if (!canceled) {
-      (*i)->find_results_.number_of_matches_ =
-          find_info->find_results_.number_of_matches_;
-    }
-
-    // Call the request's callback function with the find results, and then
-    // delete its map entry to free the WebviewFindFunction object.
-    (*i)->SendResponse(canceled);
-    find_info_map_.erase((*i)->request_id_);
-  }
-
-  // Erase the first find request's map entry to free the WebviewFindFunction
-  // object.
-  find_info_map_.erase(session_request_id);
-}
-
-void WebviewFindHelper::Find(
-    content::WebContents* guest_web_contents,
-    const base::string16& search_text,
-    const blink::WebFindOptions& options,
-    scoped_refptr<extensions::WebviewFindFunction> find_function) {
-  // Need a new request_id for each new find request.
-  ++current_find_request_id_;
-
-  // Stores the find request information by request_id so that its callback
-  // function can be called when the find results are available.
-  std::pair<FindInfoMap::iterator, bool> insert_result =
-      find_info_map_.insert(
-          std::make_pair(current_find_request_id_,
-                         linked_ptr<WebviewFindHelper::FindInfo>(
-                             new WebviewFindHelper::FindInfo(
-                                 current_find_request_id_,
-                                 search_text,
-                                 options,
-                                 find_function))));
-  // No duplicate insertions.
-  DCHECK(insert_result.second);
-
-  // Find options including the implicit |findNext| field.
-  blink::WebFindOptions* full_options = insert_result.first->second->options();
-
-  // Set |findNext| implicitly.
-  if (current_find_session_.get()) {
-    const base::string16& current_search_text =
-        current_find_session_->search_text();
-    bool current_match_case = current_find_session_->options()->matchCase;
-    full_options->findNext = !current_search_text.empty() &&
-        current_search_text == search_text &&
-        current_match_case == options.matchCase;
-  } else {
-    full_options->findNext = false;
-  }
-
-  // Link find requests that are a part of the same find session.
-  if (full_options->findNext && current_find_session_.get()) {
-    DCHECK(current_find_request_id_ != current_find_session_->request_id());
-    current_find_session_->AddFindNextRequest(
-        insert_result.first->second->AsWeakPtr());
-  }
-
-  // Update the current find session, if necessary.
-  if (!full_options->findNext)
-    current_find_session_ = insert_result.first->second;
-
-  guest_web_contents->Find(current_find_request_id_,
-                           search_text, *full_options);
-}
-
-void WebviewFindHelper::FindReply(int request_id,
-                                  int number_of_matches,
-                                  const gfx::Rect& selection_rect,
-                                  int active_match_ordinal,
-                                  bool final_update) {
-  FindInfoMap::iterator find_iterator = find_info_map_.find(request_id);
-
-  // Ignore slow replies to canceled find requests.
-  if (find_iterator == find_info_map_.end())
-    return;
-
-  // This find request must be a part of an existing find session.
-  DCHECK(current_find_session_.get());
-
-  WebviewFindHelper::FindInfo* find_info = find_iterator->second.get();
-
-  // Handle canceled find requests.
-  if (!find_info->options()->findNext &&
-      find_info_map_.begin()->first < request_id) {
-    DCHECK_NE(current_find_session_->request_id(),
-              find_info_map_.begin()->first);
-    DispatchFindUpdateEvent(true /* canceled */, true /* final_update */);
-    EndFindSession(find_info_map_.begin()->first, true /* canceled */);
-  }
-
-  // Clears the results for |findupdate| for a new find session.
-  if (!find_info->replied() && !find_info->options()->findNext)
-    find_update_event_.reset(new FindUpdateEvent(find_info->search_text()));
-
-  // Aggregate the find results.
-  find_info->AggregateResults(number_of_matches, selection_rect,
-                              active_match_ordinal, final_update);
-  find_update_event_->AggregateResults(number_of_matches, selection_rect,
-                                      active_match_ordinal, final_update);
-
-  // Propagate incremental results to the |findupdate| event.
-  DispatchFindUpdateEvent(false /* canceled */, final_update);
-
-  // Call the callback functions of completed find requests.
-  if (final_update)
-    EndFindSession(request_id, false /* canceled */);
-}
-
-WebviewFindHelper::FindResults::FindResults()
-    : number_of_matches_(0),
-      active_match_ordinal_(0) {}
-
-WebviewFindHelper::FindResults::~FindResults() {
-}
-
-void WebviewFindHelper::FindResults::AggregateResults(
-    int number_of_matches,
-    const gfx::Rect& selection_rect,
-    int active_match_ordinal,
-    bool final_update) {
-  if (number_of_matches != -1)
-    number_of_matches_ = number_of_matches;
-
-  if (active_match_ordinal != -1)
-    active_match_ordinal_ = active_match_ordinal;
-
-  if (final_update && active_match_ordinal_ == 0) {
-    // No match found, so the selection rectangle is empty.
-    selection_rect_ = gfx::Rect();
-  } else if (!selection_rect.IsEmpty()) {
-    selection_rect_ = selection_rect;
-  }
-}
-
-void WebviewFindHelper::FindResults::PrepareResults(
-    base::DictionaryValue* results) {
-  results->SetInteger(webview::kFindNumberOfMatches, number_of_matches_);
-  results->SetInteger(webview::kFindActiveMatchOrdinal, active_match_ordinal_);
-  base::DictionaryValue rect;
-  rect.SetInteger(webview::kFindRectLeft, selection_rect_.x());
-  rect.SetInteger(webview::kFindRectTop, selection_rect_.y());
-  rect.SetInteger(webview::kFindRectWidth, selection_rect_.width());
-  rect.SetInteger(webview::kFindRectHeight, selection_rect_.height());
-  results->Set(webview::kFindSelectionRect, rect.DeepCopy());
-}
-
-WebviewFindHelper::FindUpdateEvent::FindUpdateEvent(
-    const base::string16& search_text) : search_text_(search_text) {
-}
-
-WebviewFindHelper::FindUpdateEvent::~FindUpdateEvent() {
-}
-
-void WebviewFindHelper::FindUpdateEvent::AggregateResults(
-    int number_of_matches,
-    const gfx::Rect& selection_rect,
-    int active_match_ordinal,
-    bool final_update) {
-  find_results_.AggregateResults(number_of_matches, selection_rect,
-                                 active_match_ordinal, final_update);
-}
-
-void WebviewFindHelper::FindUpdateEvent::PrepareResults(
-    base::DictionaryValue* results) {
-  results->SetString(webview::kFindSearchText, search_text_);
-  find_results_.PrepareResults(results);
-}
-
-WebviewFindHelper::FindInfo::FindInfo(
-    int request_id,
-    const base::string16& search_text,
-    const blink::WebFindOptions& options,
-    scoped_refptr<extensions::WebviewFindFunction> find_function)
-    : request_id_(request_id),
-      search_text_(search_text),
-      options_(options),
-      find_function_(find_function),
-      replied_(false),
-      weak_ptr_factory_(this) {
-}
-
-WebviewFindHelper::FindInfo::~FindInfo() {
-}
-
-void WebviewFindHelper::FindInfo::AggregateResults(
-    int number_of_matches,
-    const gfx::Rect& selection_rect,
-    int active_match_ordinal,
-    bool final_update) {
-  replied_ = true;
-  find_results_.AggregateResults(number_of_matches, selection_rect,
-                                 active_match_ordinal, final_update);
-}
-
-base::WeakPtr<WebviewFindHelper::FindInfo>
-    WebviewFindHelper::FindInfo::AsWeakPtr() {
-  return weak_ptr_factory_.GetWeakPtr();
-}
-
-void WebviewFindHelper::FindInfo::SendResponse(bool canceled) {
-  // Prepare the find results to pass to the callback function.
-  base::DictionaryValue results;
-  find_results_.PrepareResults(&results);
-  results.SetBoolean(webview::kFindCanceled, canceled);
-
-  // Call the callback.
-  find_function_->SetResult(results.DeepCopy());
-  find_function_->SendResponse(true);
-}