[Payments] Fix up field widths in desktop editors.

chrome/browser/ui/views/payments/editor_view_controller.cc

Index: chrome/browser/ui/views/payments/editor_view_controller.cc
diff --git a/chrome/browser/ui/views/payments/editor_view_controller.cc b/chrome/browser/ui/views/payments/editor_view_controller.cc
index a6e926ebae2399c4a477f373a0abcaa98d0b1d44..44ac42a67589145a6fecc7b587880fd6f0c87a24 100644
--- a/chrome/browser/ui/views/payments/editor_view_controller.cc
+++ b/chrome/browser/ui/views/payments/editor_view_controller.cc
@@ -106,6 +106,11 @@ std::unique_ptr<views::View> EditorViewController::CreateCustomFieldView(
   return nullptr;
 }
 
+std::unique_ptr<views::View> EditorViewController::CreateExtraViewForField(
+    autofill::ServerFieldType type) {
+  return nullptr;
+}
+
 std::unique_ptr<views::Button> EditorViewController::CreatePrimaryButton() {
   std::unique_ptr<views::Button> button(
       views::MdTextButton::CreateSecondaryUiBlueButton(
@@ -205,28 +210,79 @@ std::unique_ptr<views::View> EditorViewController::CreateEditorView() {
   text_fields_.clear();
   comboboxes_.clear();
 
-  std::unique_ptr<views::GridLayout> editor_layout =
-      base::MakeUnique<views::GridLayout>(editor_view.get());
-
   // The editor view is padded horizontally.
   editor_view->SetBorder(views::CreateEmptyBorder(
       0, payments::kPaymentRequestRowHorizontalInsets, 0,
       payments::kPaymentRequestRowHorizontalInsets));
 
-  views::ColumnSet* columns = editor_layout->AddColumnSet(0);
-  columns->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER, 0,
-                     views::GridLayout::USE_PREF, 0, 0);
-
-  // This is the horizontal padding between the label and the input field.
+  // All views have fixed size except the Field which stretches. The fixed
+  // padding at the end is computed so that Field views have a minimum of
+  // 176/272dp (short/long fields) as per spec.
+  // ___________________________________________________________________________
+  // |Label | 16dp pad | Field (flex) | 8dp pad | Extra View | Computed Padding|
+  // |______|__________|______________|_________|____________|_________________|
+  constexpr int kLabelWidth = 140;
+  // This is the horizontal padding between the label and the field.
   constexpr int kLabelInputFieldHorizontalPadding = 16;
-  columns->AddPaddingColumn(0, kLabelInputFieldHorizontalPadding);
+  // This is the horizontal padding between the field and the extra view.
+  constexpr int kFieldExtraViewHorizontalPadding = 8;
+  constexpr int kShortFieldMinimumWidth = 176;
+  constexpr int kLongFieldMinimumWidth = 272;
 
-  columns->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER, 0,
-                     views::GridLayout::USE_PREF, 0, 0);
+  std::unique_ptr<views::GridLayout> editor_layout =
+      base::MakeUnique<views::GridLayout>(editor_view.get());
+  // Column set for short fields.
+  views::ColumnSet* columns_short = editor_layout->AddColumnSet(0);
+  columns_short->AddColumn(views::GridLayout::LEADING,
+                           views::GridLayout::CENTER, 0,
+                           views::GridLayout::FIXED, kLabelWidth, 0);
+  columns_short->AddPaddingColumn(0, kLabelInputFieldHorizontalPadding);
+  // The field view column stretches.
+  columns_short->AddColumn(views::GridLayout::LEADING,
+                           views::GridLayout::CENTER, 1,
+                           views::GridLayout::USE_PREF, 0, 0);
+  columns_short->AddPaddingColumn(0, kFieldExtraViewHorizontalPadding);
+  // The extra field view column is fixed size, computed from the largest
+  // extra view.
+  int short_extra_view_width =
+      ComputeWidestExtraViewWidth(EditorField::LengthHint::HINT_SHORT);
+  columns_short->AddColumn(views::GridLayout::LEADING,
+                           views::GridLayout::CENTER, 0,
+                           views::GridLayout::FIXED, short_extra_view_width, 0);
+  // The padding at the end is fixed, computed to make sure the short field
+  // maintains its minimum width.
+  int short_padding = kDialogMinWidth - kShortFieldMinimumWidth - kLabelWidth -
+                      (2 * kPaymentRequestRowHorizontalInsets) -
+                      kLabelInputFieldHorizontalPadding -
+                      kFieldExtraViewHorizontalPadding - short_extra_view_width;
+  columns_short->AddPaddingColumn(0, short_padding);
+
+  // Column set for long fields.
+  views::ColumnSet* columns_long = editor_layout->AddColumnSet(1);
+  columns_long->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER,
+                          0, views::GridLayout::FIXED, kLabelWidth, 0);
+  columns_long->AddPaddingColumn(0, kLabelInputFieldHorizontalPadding);
+  // The field view column stretches.
+  columns_long->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER,
+                          1, views::GridLayout::USE_PREF, 0, 0);
+  columns_long->AddPaddingColumn(0, kFieldExtraViewHorizontalPadding);
+  // The extra field view column is fixed size, computed from the largest
+  // extra view.
+  int long_extra_view_width =
+      ComputeWidestExtraViewWidth(EditorField::LengthHint::HINT_LONG);
+  columns_long->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER,
+                          0, views::GridLayout::FIXED, long_extra_view_width,
+                          0);
+  // The padding at the end is fixed, computed to make sure the long field
+  // maintains its minimum width.
+  int long_padding = kDialogMinWidth - kLongFieldMinimumWidth - kLabelWidth -
+                     (2 * kPaymentRequestRowHorizontalInsets) -
+                     kLabelInputFieldHorizontalPadding -
+                     kFieldExtraViewHorizontalPadding - long_extra_view_width;
+  columns_long->AddPaddingColumn(0, long_padding);
 
   editor_view->SetLayoutManager(editor_layout.release());
-  std::vector<EditorField> fields = GetFieldDefinitions();
-  for (const auto& field : fields) {
+  for (const auto& field : GetFieldDefinitions()) {
     CreateInputField(
         static_cast<views::GridLayout*>(editor_view->GetLayoutManager()),
         field);
@@ -243,15 +299,17 @@ std::unique_ptr<views::View> EditorViewController::CreateEditorView() {
 // +----------------------------------------------------------+
 void EditorViewController::CreateInputField(views::GridLayout* layout,
                                             const EditorField& field) {
+  int column_set =
+      field.length_hint == EditorField::LengthHint::HINT_SHORT ? 0 : 1;
+
   // This is the top padding for every row.
   constexpr int kInputRowSpacing = 6;
-  layout->StartRowWithPadding(0, 0, 0, kInputRowSpacing);
+  layout->StartRowWithPadding(0, column_set, 0, kInputRowSpacing);
 
   std::unique_ptr<views::Label> label = base::MakeUnique<views::Label>(
       field.required ? field.label + base::ASCIIToUTF16("*") : field.label);
 
   label->SetMultiLine(true);
-  label->SetMaximumWidth(kMaximumLabelWidth);
   layout->AddView(label.release());
 
   constexpr int kInputFieldHeight = 28;
@@ -275,8 +333,10 @@ void EditorViewController::CreateInputField(views::GridLayout* layout,
   } else if (field.control_type == EditorField::ControlType::COMBOBOX) {
     ValidatingCombobox* combobox = new ValidatingCombobox(
         GetComboboxModelForType(field.type), CreateValidationDelegate(field));
-    combobox->SelectValue(GetInitialValueForType(field.type));
-    // Using autofill field type as a view ID (for testing).
+    base::string16 initial_value = GetInitialValueForType(field.type);
+    if (!initial_value.empty())
+      combobox->SelectValue(initial_value);
+    // Using autofill field type as a view ID.
     combobox->set_id(static_cast<int>(field.type));
     combobox->set_listener(this);
     comboboxes_.insert(std::make_pair(combobox, field));
@@ -290,10 +350,18 @@ void EditorViewController::CreateInputField(views::GridLayout* layout,
   } else {
     // Custom field view will now be owned by |row|. And it must be valid since
     // the derived class specified a custom view for this field.
-    layout->AddView(CreateCustomFieldView(field.type).release());
+    std::unique_ptr<views::View> field_view = CreateCustomFieldView(field.type);
+    DCHECK(field_view);
+    layout->AddView(field_view.release());
   }
 
-  layout->StartRow(0, 0);
+  // If an extra view needs to go alongside the input field view, add it to the
+  // last column.
+  std::unique_ptr<views::View> extra_view = CreateExtraViewForField(field.type);
+  if (extra_view)
+    layout->AddView(extra_view.release());
+
+  layout->StartRow(0, column_set);
   layout->SkipColumns(1);
   std::unique_ptr<views::View> error_label_view =
       base::MakeUnique<views::View>();
@@ -305,4 +373,22 @@ void EditorViewController::CreateInputField(views::GridLayout* layout,
   layout->AddPaddingRow(0, kInputRowSpacing);
 }
 
+int EditorViewController::ComputeWidestExtraViewWidth(
+    EditorField::LengthHint size) {
+  int widest_column_width = 0;
+
+  for (const auto& field : GetFieldDefinitions()) {
+    if (field.length_hint != size)
+      continue;
+
+    std::unique_ptr<views::View> extra_view =
+        CreateExtraViewForField(field.type);
+    if (!extra_view)
+      continue;
+    widest_column_width =
+        std::max(extra_view->GetPreferredSize().width(), widest_column_width);
+  }
+  return widest_column_width;
+}
+
 }  // namespace payments