Revert of Move core web_view code to extensions.

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/web_view/web_view_internal_api.h"
+#include "chrome/browser/guest_view/web_view/web_view_constants.h"
+
+namespace extensions {
+
+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_->DispatchEventToEmbedder(
+      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 WebViewInternalFindFunction object.
+    (*i)->SendResponse(canceled);
+    find_info_map_.erase((*i)->request_id_);
+  }
+
+  // Erase the first find request's map entry to free the
+  // WebViewInternalFindFunction
+  // 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<WebViewInternalFindFunction> 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<WebViewInternalFindFunction> 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);
+}
+
+}  // namespace extensions