Add picker view for Web Share Target.

chrome/browser/ui/views/webshare/target_picker_view.cc

+// 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 "chrome/browser/ui/views/webshare/target_picker_view.h"
+
+#include "chrome/grit/generated_resources.h"
+#include "components/constrained_window/constrained_window_views.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/controls/table/table_view.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/layout/layout_constants.h"
+
+namespace {
+
+int kDialogWidth = 500;
+int kDialogHeight = 400;
+
+}  // namespace
+
+namespace chrome {
+
+void ShowWebShareTargetPickerDialog(
+    gfx::NativeWindow parent_window,
+    const std::vector<base::string16>& targets,
+    const base::Callback<void(bool)>& callback) {
+  constrained_window::CreateBrowserModalDialogViews(
+      new WebShareTargetPickerView(targets, callback), parent_window)
+      ->Show();
+}
+
+}  // namespace chrome
+
+WebShareTargetPickerView::WebShareTargetPickerView(
+    const std::vector<base::string16>& targets,
+    const base::Callback<void(bool)>& close_callback)
+    : targets_(targets), close_callback_(close_callback) {
+  InitControls();
+}
+
+WebShareTargetPickerView::~WebShareTargetPickerView() {}
+
+void WebShareTargetPickerView::InitControls() {
+  views::BoxLayout* layout = new views::BoxLayout(
+      views::BoxLayout::kVertical, views::kPanelHorizMargin,
+      views::kPanelVertMargin, views::kRelatedControlVerticalSpacing);
+  SetLayoutManager(layout);
+
+  views::Label* overview_label = new views::Label(
+      l10n_util::GetStringUTF16(IDS_WEBSHARE_TARGET_PICKER_LABEL));
+  AddChildView(overview_label);
+
+  std::vector<ui::TableColumn> table_columns{ui::TableColumn()};
+  views::TableView* table =
+      new views::TableView(this, table_columns, views::TEXT_ONLY, true);
+  // Select the first row.
+  if (RowCount() > 0)

[sky, 2017/01/23 16:38:55]

I would think this would be a DCHECK, otherwise what's the point of showing this
dialog? 

[Matt Giuca, 2017/01/30 04:07:12]

There might not be any targets, so this can't DCHECK (at least not for now).
Eventually we would need to either show a different dialog or modify this one to
be an error, or perhaps just silently fail, if there aren't any targets. For now
(again: temporary UX for proof-of-concept) I think it's OK to just have it empty
here.

+    table->Select(0);
+
+  // Create the table parent (a ScrollView which includes the scroll bars and
+  // border). We add this parent (not the table itself) to the dialog.
+  views::View* table_parent = table->CreateParentIfNecessary();
+  AddChildView(table_parent);
+  // Make the table expand to fill the space.
+  layout->SetFlexForView(table_parent, 1);
+}
+
+gfx::Size WebShareTargetPickerView::GetPreferredSize() const {
+  return gfx::Size(kDialogWidth, kDialogHeight);
+}
+
+ui::ModalType WebShareTargetPickerView::GetModalType() const {
+  return ui::MODAL_TYPE_WINDOW;
+}
+
+base::string16 WebShareTargetPickerView::GetWindowTitle() const {
+  return l10n_util::GetStringUTF16(IDS_WEBSHARE_TARGET_PICKER_TITLE);
+}
+
+bool WebShareTargetPickerView::Cancel() {
+  if (!close_callback_.is_null())
+    close_callback_.Run(false);
+
+  return true;
+}
+
+bool WebShareTargetPickerView::Accept() {
+  if (!close_callback_.is_null())
+    close_callback_.Run(true);
+
+  return true;
+}
+
+base::string16 WebShareTargetPickerView::GetDialogButtonLabel(
+    ui::DialogButton button) const {
+  if (button == ui::DIALOG_BUTTON_OK)
+    return l10n_util::GetStringUTF16(IDS_WEBSHARE_TARGET_PICKER_COMMIT);
+
+  return views::DialogDelegateView::GetDialogButtonLabel(button);
+}
+
+int WebShareTargetPickerView::RowCount() {
+  return targets_.size();
+}
+
+base::string16 WebShareTargetPickerView::GetText(int row, int /*column_id*/) {
+  return targets_[row];
+}
+
+void WebShareTargetPickerView::SetObserver(ui::TableModelObserver* observer) {}