[AiS] for desktop, two lines and font sytles

chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc

 // Copyright (c) 2012 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/ui/views/omnibox/omnibox_popup_contents_view.h"
 
 #include <algorithm>
 
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/themes/theme_properties.h"
 #include "chrome/browser/ui/omnibox/omnibox_view.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
 #include "chrome/browser/ui/views/omnibox/omnibox_result_view.h"
+#include "components/omnibox/omnibox_field_trial.h"
 #include "ui/base/theme_provider.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/path.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/view_targeter.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/non_client_view.h"
 
@@ skipping 353 matching lines @@
   View::PaintChildren(canvas, views::CullSet());
 }
 
 int OmniboxPopupContentsView::CalculatePopupHeight() {
   DCHECK_GE(static_cast<size_t>(child_count()), model_->result().size());
   int popup_height = 0;
   for (size_t i = model_->result().ShouldHideTopMatch() ? 1 : 0;
        i < model_->result().size(); ++i)
     popup_height += child_at(i)->GetPreferredSize().height();
 
-  // Add enough space on the top and bottom so it looks like there is the same
-  // amount of space between the text and the popup border as there is in the
-  // interior between each row of text.
-  //
-  // Discovering the exact amount of leading and padding around the font is
-  // a bit tricky and platform-specific, but this computation seems to work in
-  // practice.
-  OmniboxResultView* result_view = result_view_at(0);
-  outside_vertical_padding_ =
-      (result_view->GetPreferredSize().height() -
-       result_view->GetTextHeight());
-
+  if (OmniboxFieldTrial::EnableAnswersInSuggest()) {
+    // The cell heights for the result views can
+    // vary cell to cell.  They may vary by the number of lines used for the
+    // result or by the fonts used.  Because of this, we're not able to use the
+    // <preferred size height minus text height> method used below.
+    // The * 2 makes this approximation match the prior method (empirically).
+    outside_vertical_padding_ =
+        result_view_at(0)->get_minimum_text_vertical_padding() * 2;
+  } else {
+    // Add enough space on the top and bottom so it looks like there is the same
+    // amount of space between the text and the popup border as there is in the
+    // interior between each row of text.
+    //
+    // Discovering the exact amount of leading and padding around the font is
+    // a bit tricky and platform-specific, but this computation seems to work in
+    // practice.
+    OmniboxResultView* result_view = result_view_at(0);
+    outside_vertical_padding_ = (result_view->GetPreferredSize().height() -
+                                 result_view->GetTextHeight());
+  }
   return popup_height +
          views::NonClientFrameView::kClientEdgeThickness +  // Top border.
          outside_vertical_padding_ * 2 +                    // Padding.
          bottom_shadow_->height() - kBorderInterior;        // Bottom border.
 }
 
 OmniboxResultView* OmniboxPopupContentsView::CreateResultView(
     int model_index,
     const gfx::FontList& font_list) {
   return new OmniboxResultView(this, model_index, location_bar_view_,
@@ skipping 98 matching lines @@
   size_t index = GetIndexForPoint(event.location());
   if (!HasMatchAt(index))
     return;
   omnibox_view_->OpenMatch(model_->result().match_at(index), disposition,
                            GURL(), base::string16(), index);
 }
 
 OmniboxResultView* OmniboxPopupContentsView::result_view_at(size_t i) {
   return static_cast<OmniboxResultView*>(child_at(static_cast<int>(i)));
 }