Add "previewing on hover" support for single-field autocomplete input

components/autofill/content/renderer/autofill_agent.cc

 // Copyright 2013 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 "components/autofill/content/renderer/autofill_agent.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_split.h"
@@ skipping 130 matching lines @@
 
 bool AutofillAgent::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AutofillAgent, message)
     IPC_MESSAGE_HANDLER(AutofillMsg_FillForm, OnFillForm)
     IPC_MESSAGE_HANDLER(AutofillMsg_PreviewForm, OnPreviewForm)
     IPC_MESSAGE_HANDLER(AutofillMsg_FieldTypePredictionsAvailable,
                         OnFieldTypePredictionsAvailable)
     IPC_MESSAGE_HANDLER(AutofillMsg_ClearForm, OnClearForm)
     IPC_MESSAGE_HANDLER(AutofillMsg_ClearPreviewedForm, OnClearPreviewedForm)
-    IPC_MESSAGE_HANDLER(AutofillMsg_SetNodeText, OnSetNodeText)
+    IPC_MESSAGE_HANDLER(AutofillMsg_FillFieldWithValue, OnFillFieldWithValue)
+    IPC_MESSAGE_HANDLER(AutofillMsg_PreviewFieldWithValue,
+                        OnPreviewFieldWithValue)
     IPC_MESSAGE_HANDLER(AutofillMsg_AcceptDataListSuggestion,
                         OnAcceptDataListSuggestion)
     IPC_MESSAGE_HANDLER(AutofillMsg_AcceptPasswordAutofillSuggestion,
                         OnAcceptPasswordAutofillSuggestion)
     IPC_MESSAGE_HANDLER(AutofillMsg_RequestAutocompleteResult,
                         OnRequestAutocompleteResult)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
@@ skipping 220 matching lines @@
       if (!IsWhitespace(last_part[i])) {
         last_part = last_part.substr(0, i);
         break;
       }
     }
     last_part.append(suggested_value);
     parts[parts.size() - 1] = last_part;
 
     new_value = JoinString(parts, ',');
   }
-  SetNodeText(new_value, &element_);
+  FillFieldWithValue(new_value, &element_);
 }
 
 void AutofillAgent::OnFieldTypePredictionsAvailable(
     const std::vector<FormDataPredictions>& forms) {
   for (size_t i = 0; i < forms.size(); ++i) {
     form_cache_.ShowPredictions(forms[i]);
   }
 }
 
 void AutofillAgent::OnFillForm(int query_id, const FormData& form) {
@@ skipping 28 matching lines @@
   } else {
     // TODO(isherman): There seem to be rare cases where this code *is*
     // reachable: see [ http://crbug.com/96321#c6 ].  Ideally we would
     // understand those cases and fix the code to avoid them.  However, so far I
     // have been unable to reproduce such a case locally.  If you hit this
     // NOTREACHED(), please file a bug against me.
     NOTREACHED();
   }
 }
 
-void AutofillAgent::OnSetNodeText(const base::string16& value) {
-  SetNodeText(value, &element_);
+void AutofillAgent::OnFillFieldWithValue(const base::string16& value) {
+  FillFieldWithValue(value, &element_);
+}
+
+void AutofillAgent::OnPreviewFieldWithValue(const base::string16& value) {
+  PreviewFieldWithValue(value, &element_);
 }
 
 void AutofillAgent::OnAcceptDataListSuggestion(const base::string16& value) {
   AcceptDataListSuggestion(value);
 }
 
 void AutofillAgent::OnAcceptPasswordAutofillSuggestion(
     const base::string16& username) {
   // We need to make sure this is handled here because the browser process
   // skipped it handling because it believed it would be handled here. If it
@@ skipping 112 matching lines @@
                                        data_list_labels));
 
   Send(new AutofillHostMsg_QueryFormFieldAutofill(routing_id(),
                                                   autofill_query_id_,
                                                   form,
                                                   field,
                                                   bounding_box_scaled,
                                                   display_warning_if_disabled));
 }
 
-void AutofillAgent::SetNodeText(const base::string16& value,
-                                blink::WebInputElement* node) {
+void AutofillAgent::FillFieldWithValue(const base::string16& value,
+                                       blink::WebInputElement* node) {
   did_set_node_text_ = true;
   node->setEditingValue(value.substr(0, node->maxLength()));

[Ilya Sherman, 2014/03/14 07:17:05]

Let's call setAutofilled() here too, so that the yellow background doesn't
vanish when actually filling the field.

[ziran.sun, 2014/03/14 13:50:57]

Done.

 }
 
+void AutofillAgent::PreviewFieldWithValue(const base::string16& value,
+                                          blink::WebInputElement* node) {
+  was_query_node_autofilled_ = element_.isAutofilled();
+  node->setSuggestedValue(value.substr(0, node->maxLength()));
+  node->setAutofilled(true);
+}
+
 void AutofillAgent::HidePopup() {
   if (!is_popup_possibly_visible_)
     return;
 
   if (!element_.isNull())
     OnClearPreviewedForm();
 
   is_popup_possibly_visible_ = false;
   Send(new AutofillHostMsg_HidePopup(routing_id()));
 }
 
 // TODO(isherman): Decide if we want to support non-password autofill with AJAX.
 void AutofillAgent::didAssociateFormControls(
     const blink::WebVector<blink::WebNode>& nodes) {
   for (size_t i = 0; i < nodes.size(); ++i) {
     blink::WebFrame* frame = nodes[i].document().frame();
     // Only monitors dynamic forms created in the top frame. Dynamic forms
     // inserted in iframes are not captured yet.
     if (!frame->parent()) {
       password_autofill_agent_->OnDynamicFormsSeen(frame);
       return;
     }
   }
 }
 
 }  // namespace autofill