Add help link when Bluetooth adapter is off for WebBluetooth chooser on Mac

chrome/browser/ui/cocoa/chooser_content_view_cocoa.mm

 // Copyright 2016 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.
 
 #import "chrome/browser/ui/cocoa/chooser_content_view_cocoa.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 42 matching lines @@
 // Separator alpha value.
 const CGFloat kSeparatorAlphaValue = 0.6f;
 
 // Separator height.
 const CGFloat kSeparatorHeight = 1.0f;
 
 // Distance between two views inside the table row view.
 const CGFloat kTableRowViewHorizontalPadding = 5.0f;
 const CGFloat kTableRowViewVerticalPadding = 1.0f;
 
+// Distance between the adapter off help link and the scroll view boundaries.
+const CGFloat kAdapterOffHelpLinkPadding = 5.0f;
+
 // The lookup table for signal strength level image.
 const int kSignalStrengthLevelImageIds[5] = {IDR_SIGNAL_0_BAR, IDR_SIGNAL_1_BAR,
                                              IDR_SIGNAL_2_BAR, IDR_SIGNAL_3_BAR,
                                              IDR_SIGNAL_4_BAR};
 const int kSignalStrengthLevelImageSelectedIds[5] = {
     IDR_SIGNAL_0_BAR_SELECTED, IDR_SIGNAL_1_BAR_SELECTED,
     IDR_SIGNAL_2_BAR_SELECTED, IDR_SIGNAL_3_BAR_SELECTED,
     IDR_SIGNAL_4_BAR_SELECTED};
 
 // Creates a label with |text|.
@@ skipping 153 matching lines @@
 - (NSTextField*)pairedStatus {
   return pairedStatus_.get();
 }
 
 @end
 
 class ChooserContentViewController : public ChooserController::View {
  public:
   ChooserContentViewController(ChooserContentViewCocoa* chooser_content_view,
                                ChooserController* chooser_controller,
+                               NSButton* adapter_off_help_button,
                                NSTableView* table_view,
                                SpinnerView* spinner,
                                NSTextField* status,
                                NSButton* rescan_button);
   ~ChooserContentViewController() override;
 
   // ChooserController::View:
   void OnOptionsInitialized() override;
   void OnOptionAdded(size_t index) override;
   void OnOptionRemoved(size_t index) override;
   void OnOptionUpdated(size_t index) override;
   void OnAdapterEnabledChanged(bool enabled) override;
   void OnRefreshStateChanged(bool refreshing) override;
 
   void UpdateTableView();
 
  private:
   ChooserContentViewCocoa* chooser_content_view_;
   ChooserController* chooser_controller_;
+  NSButton* adapter_off_help_button_;
   NSTableView* table_view_;
   SpinnerView* spinner_;
   NSTextField* status_;
   NSButton* rescan_button_;
 
   DISALLOW_COPY_AND_ASSIGN(ChooserContentViewController);
 };
 
 ChooserContentViewController::ChooserContentViewController(
     ChooserContentViewCocoa* chooser_content_view,
     ChooserController* chooser_controller,
+    NSButton* adapter_off_help_button,
     NSTableView* table_view,
     SpinnerView* spinner,
     NSTextField* status,
     NSButton* rescan_button)
     : chooser_content_view_(chooser_content_view),
       chooser_controller_(chooser_controller),
+      adapter_off_help_button_(adapter_off_help_button),
       table_view_(table_view),
       spinner_(spinner),
       status_(status),
       rescan_button_(rescan_button) {
   DCHECK(chooser_controller_);
+  DCHECK(adapter_off_help_button_);
   DCHECK(table_view_);
   DCHECK(spinner_);
   DCHECK(status_);
   DCHECK(rescan_button_);
   chooser_controller_->set_view(this);
 }
 
 ChooserContentViewController::~ChooserContentViewController() {
   chooser_controller_->set_view(nullptr);
 }
@@ skipping 30 matching lines @@
 void ChooserContentViewController::OnOptionUpdated(size_t index) {
   UpdateTableView();
 }
 
 void ChooserContentViewController::OnAdapterEnabledChanged(bool enabled) {
   // No row is selected since the adapter status has changed.
   // This will also disable the OK button if it was enabled because
   // of a previously selected row.
   [table_view_ deselectAll:nil];
   UpdateTableView();
-  [table_view_ setHidden:NO];
+  [table_view_ setHidden:enabled ? NO : YES];
+  [adapter_off_help_button_ setHidden:enabled ? YES : NO];
 
   [spinner_ setHidden:YES];
 
   [status_ setHidden:YES];
   // When adapter is enabled, show |rescan_button_|; otherwise hide it.
   [rescan_button_ setHidden:enabled ? NO : YES];
 
   [chooser_content_view_ updateView];
 }
 
@@ skipping 64 matching lines @@
   NSRect chooserFrame = NSMakeRect(0, 0, kChooserWidth, kChooserHeight);
 
   if ((self = [super initWithFrame:chooserFrame])) {
     chooserController_ = std::move(chooserController);
 
     // Create the views.
     // Title.
     titleView_ = [self createChooserTitle:chooserTitle];
     titleHeight_ = NSHeight([titleView_ frame]);
 
+    // Adapter turned off help button.
+    adapterOffHelpButton_ =
+        [self createHyperlinkButtonWithText:
+                  l10n_util::GetNSString(
+                      IDS_BLUETOOTH_DEVICE_CHOOSER_TURN_ADAPTER_OFF)];
+    CGFloat adapterOffHelpButtonHeight =
+        NSHeight([adapterOffHelpButton_ frame]);
+
     // Status.
     status_ = CreateLabel(
         l10n_util::GetNSString(IDS_BLUETOOTH_DEVICE_CHOOSER_SCANNING));
     CGFloat statusWidth = kChooserWidth / 2 - kMarginX;
     // The height is arbitrary as it will be adjusted later.
     [status_ setFrameSize:NSMakeSize(statusWidth, 0.0f)];
     [GTMUILocalizerAndLayoutTweaker sizeToFitFixedWidthTextField:status_];
     statusHeight_ = NSHeight([status_ frame]);
 
     // Re-scan button.
@@ skipping 31 matching lines @@
 
     // ScollView embedding with TableView.
     noStatusOrRescanButtonShown_.scroll_view_frame =
         [self calculateScrollViewFrame:buttonRowHeight];
     scrollView_.reset([[NSScrollView alloc]
         initWithFrame:noStatusOrRescanButtonShown_.scroll_view_frame]);
     [scrollView_ setBorderType:NSBezelBorder];
     [scrollView_ setHasVerticalScroller:YES];
     [scrollView_ setHasHorizontalScroller:YES];
     [scrollView_ setAutohidesScrollers:YES];
+    [scrollView_ setDrawsBackground:NO];
 
     // TableView.
     tableView_.reset([[NSTableView alloc] initWithFrame:NSZeroRect]);
     tableColumn_.reset([[NSTableColumn alloc] initWithIdentifier:@""]);
     [tableColumn_
         setWidth:(noStatusOrRescanButtonShown_.scroll_view_frame.size.width -
                   kMarginX)];
     [tableView_ addTableColumn:tableColumn_];
     // Make the column title invisible.
     [tableView_ setHeaderView:nil];
@@ skipping 17 matching lines @@
         initWithFrame:NSMakeRect(spinnerOriginX, spinnerOriginY, kSpinnerSize,
                                  kSpinnerSize)]);
 
     // Lay out the views.
     // Title.
     CGFloat titleOriginX = kMarginX;
     CGFloat titleOriginY = kChooserHeight - kMarginY - titleHeight_;
     [titleView_ setFrameOrigin:NSMakePoint(titleOriginX, titleOriginY)];
     [self addSubview:titleView_];
 
+    // Adapter turned off help button.
+    CGFloat adapterOffHelpButtonOriginX = kMarginX + kAdapterOffHelpLinkPadding;
+    CGFloat adapterOffHelpButtonOriginY = titleOriginY - kVerticalPadding -
+                                          adapterOffHelpButtonHeight -
+                                          kAdapterOffHelpLinkPadding;
+    [adapterOffHelpButton_
+        setFrameOrigin:NSMakePoint(adapterOffHelpButtonOriginX,
+                                   adapterOffHelpButtonOriginY)];
+    [adapterOffHelpButton_ setTarget:self];
+    [adapterOffHelpButton_ setAction:@selector(onAdapterOffHelp:)];
+    [adapterOffHelpButton_ setHidden:YES];
+    [self addSubview:adapterOffHelpButton_];
+
     // ScollView and Spinner. Only one of them is shown.
     [scrollView_ setDocumentView:tableView_];
     [self addSubview:scrollView_];
     [spinner_ setHidden:YES];
     [self addSubview:spinner_];
 
     // Status text field and Re-scan button. At most one of them is shown.
     [self addSubview:status_];
     [status_ setHidden:YES];
 
@@ skipping 49 matching lines @@
 
     buttonRowHeight =
         std::max(rescanButtonHeight_,
                  std::max(connectButtonHeight_, cancelButtonHeight_));
     rescanButtonShown_ = {[self calculateScrollViewFrame:buttonRowHeight],
                           [self calculateConnectButtonOrigin:buttonRowHeight],
                           [self calculateCancelButtonOrigin:buttonRowHeight]};
     rescanButtonOrigin_ = [self calculateRescanButtonOrigin:buttonRowHeight];
 
     chooserContentViewController_.reset(new ChooserContentViewController(
-        self, chooserController_.get(), tableView_.get(), spinner_.get(),
-        status_.get(), rescanButton_.get()));
+        self, chooserController_.get(), adapterOffHelpButton_.get(),
+        tableView_.get(), spinner_.get(), status_.get(), rescanButton_.get()));
   }
 
   return self;
 }
 
 - (base::scoped_nsobject<NSTextField>)createChooserTitle:(NSString*)title {
   base::scoped_nsobject<NSTextField> titleView(
       [[NSTextField alloc] initWithFrame:NSZeroRect]);
   [titleView setDrawsBackground:NO];
   [titleView setBezeled:NO];
@@ skipping 147 matching lines @@
     frameAndOrigin = rescanButtonShown_;
   } else {
     frameAndOrigin = noStatusOrRescanButtonShown_;
   }
 
   [scrollView_ setFrame:frameAndOrigin.scroll_view_frame];
   [connectButton_ setFrameOrigin:frameAndOrigin.connect_button_origin];
   [cancelButton_ setFrameOrigin:frameAndOrigin.cancel_button_origin];
 }
 
+- (NSButton*)adapterOffHelpButton {
+  return adapterOffHelpButton_.get();
+}
+
 - (NSTableView*)tableView {
   return tableView_.get();
 }
 
 - (SpinnerView*)spinner {
   return spinner_.get();
 }
 
 - (NSTextField*)status {
   return status_.get();
@@ skipping 48 matching lines @@
 }
 
 - (void)cancel {
   chooserController_->Cancel();
 }
 
 - (void)close {
   chooserController_->Close();
 }
 
+- (void)onAdapterOffHelp:(id)sender {
+  chooserController_->OpenAdapterOffHelpUrl();
+}
+
 - (void)onRescan:(id)sender {
   chooserController_->RefreshOptions();
 }
 
 - (void)onHelpPressed:(id)sender {
   chooserController_->OpenHelpCenterUrl();
 }
 
 - (void)updateContentRowColor {
   NSInteger selectedRow = [tableView_ selectedRow];
@@ skipping 51 matching lines @@
   return [tableRowView text];
 }
 
 - (NSTextField*)tableRowViewPairedStatus:(NSInteger)row {
   ChooserContentTableRowView* tableRowView =
       [tableView_ viewAtColumn:0 row:row makeIfNecessary:YES];
   return [tableRowView pairedStatus];
 }
 
 @end