Add billing address as a mandatory field of Payments credit cards.

components/autofill/core/browser/address_combobox_model.cc

Index: components/autofill/core/browser/address_combobox_model.cc
diff --git a/components/autofill/core/browser/address_combobox_model.cc b/components/autofill/core/browser/address_combobox_model.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0f2d5b13e89e73be47943a4b94b232a38ff49b54
--- /dev/null
+++ b/components/autofill/core/browser/address_combobox_model.cc
@@ -0,0 +1,140 @@
+// Copyright 2017 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/core/browser/address_combobox_model.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/autofill/core/browser/autofill_profile.h"
+#include "components/autofill/core/browser/personal_data_manager.h"
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/models/combobox_model_observer.h"
+#include "ui/gfx/text_elider.h"
+
+namespace autofill {
+
+namespace {
+// There's one header entry to prompt the user to select an address, and a
+// separator.
+int kNbHeaderEntries = 2;
+}  // namespace
+
+AddressComboboxModel::AddressComboboxModel(
+    const PersonalDataManager& personal_data_manager,
+    const std::string& app_locale)
+    : app_locale_(app_locale) {
+  for (const auto* profile : personal_data_manager.GetProfilesToSuggest()) {
+    profiles_cache_.push_back(base::MakeUnique<AutofillProfile>(*profile));
+  }
+  UpdateAddresses();
+}
+
+AddressComboboxModel::~AddressComboboxModel() {}
+
+int AddressComboboxModel::GetItemCount() const {
+  // When there are not addresses, a special entry is shown to prompt the user
+  // to add addresses, but nothing else is shown, since there are no address to
+  // select from, and no need for a separator.
+  if (addresses_.size() == 0)
+    return 1;
+  // If there are addresses to choose from, but none is selected, add extra
+  // items for the "Select" entry and a separator.
+  return addresses_.size() + kNbHeaderEntries;
+}
+
+base::string16 AddressComboboxModel::GetItemAt(int index) {
+  DCHECK_GE(index, 0);
+  // A special entry is always added at index 0 and a separator at index 1.
+  DCHECK_LT(static_cast<size_t>(index), addresses_.size() + kNbHeaderEntries);
+
+  // Special entry when no profiles have been created yet.
+  if (addresses_.empty())
+    return l10n_util::GetStringUTF16(IDS_AUTOFILL_ADD_BILLING_ADDRESS);
+
+  // Always show the "Select" entry at the top, default selection position.
+  if (index == 0)
+    return l10n_util::GetStringUTF16(IDS_AUTOFILL_SELECT);
+
+  // Always show the "Select" entry at the top, default selection position.
+  if (index == 1)
+    return base::ASCIIToUTF16("---");
+
+  return addresses_[index - kNbHeaderEntries].second;
+}
+
+bool AddressComboboxModel::IsItemSeparatorAt(int index) {
+  // The only separator is between the "Select" entry at 0 and the first address
+  // at index 2. So there must be at least one address for a separator to be
+  // shown.
+  DCHECK(index <= kNbHeaderEntries || !addresses_.empty());
+  return index == 1;
+}
+
+void AddressComboboxModel::AddObserver(ui::ComboboxModelObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void AddressComboboxModel::RemoveObserver(ui::ComboboxModelObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+int AddressComboboxModel::AddNewProfile(const AutofillProfile& profile) {
+  profiles_cache_.push_back(base::MakeUnique<AutofillProfile>(profile));
+  UpdateAddresses();
+  DCHECK_GT(addresses_.size(), 0UL);
+  return addresses_.size() + kNbHeaderEntries - 1;
+}
+
+std::string AddressComboboxModel::GetItemIdentifierAt(int index) {
+  // The first two indices are special entries, with no addresses.
+  if (index < kNbHeaderEntries)
+    return std::string();
+  DCHECK_LT(static_cast<size_t>(index), addresses_.size() + kNbHeaderEntries);
+  return addresses_[index - kNbHeaderEntries].first;
+}
+
+int AddressComboboxModel::GetIndexOfIdentifier(const std::string& identifier) {
+  for (size_t i = 0; i < addresses_.size(); ++i) {
+    if (addresses_[i].first == identifier)
+      return i + kNbHeaderEntries;
+  }
+  return -1;
+}
+
+void AddressComboboxModel::UpdateAddresses() {
+  addresses_.clear();
+  std::vector<base::string16> labels;
+  // CreateDifferentiatingLabels is expecting a pointer vector and we keep
+  // profiles as unique_ptr.
+  std::vector<AutofillProfile*> profiles;
+  for (const auto& profile : profiles_cache_) {
+    profiles.push_back(profile.get());
+  }
+  AutofillProfile::CreateDifferentiatingLabels(profiles, app_locale_, &labels);
+  DCHECK_EQ(labels.size(), profiles_cache_.size());
+
+  for (size_t i = 0; i < profiles_cache_.size(); ++i) {
+    // Skip showing auxiliary profiles (e.g. Mac Contacts).
+    if (profiles_cache_[i]->record_type() == AutofillProfile::AUXILIARY_PROFILE)
+      continue;
+
+    base::string16 label(labels[i]);
+    if (label.size() > 20) {
+      // gfx::StringSlicer keeps a references to the string16.
+      base::string16 ellipsis(base::ASCIIToUTF16("..."));

[Mathieu, 2017/05/04 20:29:19]

There appears to be kEllipsisUTF16 already defined in gfx::

Also could you use gfx::ElideText?

https://cs.chromium.org/chromium/src/ui/gfx/text_elider.cc?rcl=51adbbad187d9f...

[MAD, 2017/05/05 00:50:07]

ElideText requires a font list which we don't have, and ElideString always try
put the ellipsis in the middle if it fits.

Thanks for kEllipsisUTF16, I had not noticed it, and I found interesting that
it's not always used, even within text_elider.cc... weird...

[Mathieu, 2017/05/05 13:51:33]

I find this "cutting to 20" a bit weird, I'm not sure if it could produce weird
results in some circumstances... 

[Mathieu, 2017/05/05 13:59:07]

Also I've asked Anthony and gfx::ElideRectangleText seems to be a better method
for what you want: 

https://cs.chromium.org/chromium/src/chrome/browser/ui/views/payments/payment...

[MAD, 2017/05/05 18:32:34]

I talked to Anthony and we found this simpler solution instead. :-)

+      gfx::StringSlicer slicer(label,
+                               /*ellipsis=*/ellipsis,
+                               /*elide_in_middle=*/false,
+                               /*elide_at_beginning=*/false);
+      label = slicer.CutString(20, /*insert_ellipsis=*/true);
+    }
+    addresses_.push_back(std::make_pair(profiles_cache_[i]->guid(), label));
+  }
+
+  for (auto& observer : observers_) {
+    observer.OnComboboxModelChanged(this);
+  }
+}
+}  // namespace autofill