Add chooser permission UI code for Mac

chrome/browser/ui/cocoa/website_settings/chooser_bubble_ui_cocoa.mm

+// Copyright 2015 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/website_settings/chooser_bubble_ui_cocoa.h"
+
+#include <algorithm>
+#include <cmath>
+#include <vector>
+
+#include "base/mac/scoped_nsobject.h"
+#include "base/strings/sys_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/browser_window.h"
+#import "chrome/browser/ui/chrome_style.h"
+#import "chrome/browser/ui/cocoa/base_bubble_controller.h"
+#import "chrome/browser/ui/cocoa/browser_window_controller.h"
+#import "chrome/browser/ui/cocoa/browser_window_utils.h"
+#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_button.h"
+#import "chrome/browser/ui/cocoa/hover_close_button.h"
+#import "chrome/browser/ui/cocoa/info_bubble_view.h"
+#import "chrome/browser/ui/cocoa/info_bubble_window.h"
+#import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
+#include "chrome/browser/ui/website_settings/chooser_bubble_delegate.h"
+#include "chrome/grit/generated_resources.h"
+#include "content/public/browser/native_web_keyboard_event.h"
+#include "ui/base/cocoa/window_size_constants.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+
+namespace {
+
+// Chooser bubble width.
+const CGFloat kChooserBubbleWidth = 320.0f;
+
+// Chooser bubble height.
+const CGFloat kChooserBubbleHeight = 220.0f;
+
+// Distance between the bubble border and the view that is closest to the
+// border.
+const CGFloat kMarginX = 20.0f;
+const CGFloat kMarginY = 20.0f;
+
+// Distance between two views inside the bubble.
+const CGFloat kHorizontalPadding = 10.0f;
+const CGFloat kVerticalPadding = 10.0f;
+
+const CGFloat kTitlePaddingX = 50.0f;
+}
+
+scoped_ptr<BubbleUi> ChooserBubbleDelegate::BuildBubbleUi() {
+  return make_scoped_ptr(new ChooserBubbleUiCocoa(browser_, this));
+}
+
+@interface ChooserBubbleUiController
+    : BaseBubbleController<NSTableViewDataSource, NSTableViewDelegate> {
+ @private
+  // Bridge to the C++ class that created this object.
+  ChooserBubbleUiCocoa* bridge_;
+
+  base::scoped_nsobject<NSTextField> titleView_;
+  base::scoped_nsobject<NSButton> closeButton_;
+  base::scoped_nsobject<NSScrollView> scrollView_;
+  base::scoped_nsobject<NSTableColumn> tableColumn_;
+  base::scoped_nsobject<NSTableView> tableView_;
+  base::scoped_nsobject<NSButton> connectButton_;
+  base::scoped_nsobject<NSButton> cancelButton_;
+
+  Browser* browser_;                                // Weak.
+  ChooserBubbleDelegate* chooser_bubble_delegate_;  // Weak.
+}
+
+// Designated initializer.  |browser| and |bridge| must both be non-nil.
+- (id)initWithBrowser:(Browser*)browser
+    initWithChooserBubbleDelegate:
+        (ChooserBubbleDelegate*)chooser_bubble_delegate
+                           bridge:(ChooserBubbleUiCocoa*)bridge;
+
+// Makes the bubble visible.
+- (void)show;
+
+// Will reposition the bubble based in case the anchor or parent should change.
+- (void)updateAnchorPosition;
+
+// Will calculate the expected anchor point for this bubble.
+// Should only be used outside this class for tests.
+- (NSPoint)getExpectedAnchorPoint;
+
+// Returns true of the browser has support for the location bar.

[palmer, 2015/12/10 23:26:10]

Typo: "true if"

[juncai, 2015/12/11 20:39:46]

Done.

+// Should only be used outside this class for tests.
+- (bool)hasLocationBar;
+
+// Update table view when chooser options were initialized.

[palmer, 2015/12/10 23:26:10]

Nit: This one and those below: "Updates |tableView_| when..."

[juncai, 2015/12/11 20:39:46]

Done.

+- (void)onOptionsInitialized;
+
+// Update table view when chooser option was added.
+- (void)onOptionAdded:(NSInteger)index;
+
+// Update table view when chooser option was removed.
+- (void)onOptionRemoved:(NSInteger)index;
+
+// Update table view when chooser options changed.
+- (void)updateTableView;
+
+// Determines if the bubble has an anchor in a corner or no anchor at all.
+- (info_bubble::BubbleArrowLocation)getExpectedArrowLocation;
+
+// Returns the expected parent for this bubble.
+- (NSWindow*)getExpectedParentWindow;
+
+// Creates the title for the bubble.
+- (base::scoped_nsobject<NSTextField>)bubbleTitle;
+
+// Creates the "close" button.
+- (base::scoped_nsobject<NSButton>)closeButton;
+
+// Creates a button with |title| and |action|.
+- (base::scoped_nsobject<NSButton>)buttonWithTitle:(NSString*)title
+                                            action:(SEL)action;
+
+// Creates the "Connect" button.
+- (base::scoped_nsobject<NSButton>)connectButton;
+
+// Creates the "Cancel" button.
+- (base::scoped_nsobject<NSButton>)cancelButton;
+
+// Called when the 'Connect' button is pressed.

[palmer, 2015/12/10 23:26:10]

Nit: Consistently use either double or single quotes; consistently capitalize
Close.

[juncai, 2015/12/11 20:39:46]

Done.

+- (void)onConnect:(id)sender;
+
+// Called when the 'Cancel' button is pressed.
+- (void)onCancel:(id)sender;
+
+// Called when the 'close' button is pressed.
+- (void)onClose:(id)sender;
+
+@end
+
+@implementation ChooserBubbleUiController
+
+- (id)initWithBrowser:(Browser*)browser
+    initWithChooserBubbleDelegate:
+        (ChooserBubbleDelegate*)chooser_bubble_delegate
+                           bridge:(ChooserBubbleUiCocoa*)bridge {
+  DCHECK(browser);

[palmer, 2015/12/10 23:26:10]

According to the documentation, |browser| and |bridge| must be non-nil. So in
addition to DCHECK, maybe return early or do something else if a Release build
passes nil?

[juncai, 2015/12/11 20:39:46]

Done.

+  DCHECK(chooser_bubble_delegate);
+  DCHECK(bridge);
+  browser_ = browser;
+  chooser_bubble_delegate_ = chooser_bubble_delegate;
+
+  base::scoped_nsobject<InfoBubbleWindow> window([[InfoBubbleWindow alloc]
+      initWithContentRect:ui::kWindowSizeDeterminedLater
+                styleMask:NSBorderlessWindowMask
+                  backing:NSBackingStoreBuffered
+                    defer:NO]);
+  [window setAllowedAnimations:info_bubble::kAnimateNone];
+  [window setReleasedWhenClosed:NO];
+  if ((self = [super initWithWindow:window
+                       parentWindow:[self getExpectedParentWindow]
+                         anchoredAt:NSZeroPoint])) {
+    [self setShouldCloseOnResignKey:NO];
+    [self setShouldOpenAsKeyWindow:YES];
+    [[self bubble] setArrowLocation:[self getExpectedArrowLocation]];
+    bridge_ = bridge;
+    NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
+    [center addObserver:self
+               selector:@selector(parentWindowDidMove:)
+                   name:NSWindowDidMoveNotification
+                 object:[self getExpectedParentWindow]];
+  }
+  return self;
+}
+
+- (void)windowWillClose:(NSNotification*)notification {
+  bridge_->OnBubbleClosing();
+  [super windowWillClose:notification];
+}
+
+- (void)parentWindowWillToggleFullScreen:(NSNotification*)notification {
+  // Override the base class implementation, which would have closed the bubble.
+}
+
+- (void)parentWindowDidResize:(NSNotification*)notification {
+  DCHECK(bridge_);

[palmer, 2015/12/10 23:26:10]

Are these DCHECKs redundant, given the checks in the designated initializer?

[juncai, 2015/12/11 20:39:46]

Done.

+  [self setAnchorPoint:[self getExpectedAnchorPoint]];
+}
+
+- (void)parentWindowDidMove:(NSNotification*)notification {
+  DCHECK(bridge_);
+  [self setAnchorPoint:[self getExpectedAnchorPoint]];
+}
+
+- (void)show {
+  NSView* view = [[self window] contentView];
+  [view setSubviews:@[]];
+
+  // ------------------------------------
+  // | Chooser bubble title           x |
+  // | -------------------------------- |
+  // | | option 0                     | |
+  // | | option 1                     | |
+  // | | option 2                     | |
+  // | |                              | |
+  // | |                              | |
+  // | |                              | |
+  // | -------------------------------- |
+  // |            [ Connect] [ Cancel ] |
+  // ------------------------------------
+
+  // Determine the dimensions of the bubble.
+  // Once the height and width are set, the buttons and permission menus can
+  // be laid out correctly.
+  NSRect bubbleFrame =
+      NSMakeRect(0, 0, kChooserBubbleWidth, kChooserBubbleHeight);
+
+  // Create the views.
+  // Title.
+  titleView_ = [self bubbleTitle];
+  CGFloat titleOriginX = kMarginX;
+  CGFloat titleHeight = NSHeight([titleView_ frame]);
+  CGFloat titleOriginY = kChooserBubbleHeight - kMarginY - titleHeight;
+  [titleView_ setFrameOrigin:NSMakePoint(titleOriginX, titleOriginY)];
+  [view addSubview:titleView_];
+
+  // Close button.
+  // 'x' button in the upper-right-hand corner.

[palmer, 2015/12/10 23:26:10]

Do we need an X button, given that we also have Cancel?

[juncai, 2015/12/11 20:39:46]

Done.

+  closeButton_ = [self closeButton];
+  CGFloat closeButtonOriginX =
+      kChooserBubbleWidth - kMarginX - NSWidth([closeButton_ frame]);
+  CGFloat closeButtonOriginY =
+      kChooserBubbleHeight - kMarginY - NSHeight([closeButton_ frame]);
+  [closeButton_
+      setFrameOrigin:NSMakePoint(closeButtonOriginX, closeButtonOriginY)];
+  [view addSubview:closeButton_];
+
+  // Connect button.
+  connectButton_ = [self connectButton];
+  // Cancel button.
+  cancelButton_ = [self cancelButton];
+  CGFloat connectButtonWidth = NSWidth([connectButton_ frame]);
+  CGFloat connectButtonHeight = NSHeight([connectButton_ frame]);
+  CGFloat cancelButtonWidth = NSWidth([cancelButton_ frame]);
+
+  // ScollView embedding with TableView.
+  CGFloat scrollViewWidth = kChooserBubbleWidth - 2 * kMarginX;
+  CGFloat scrollViewHeight = kChooserBubbleHeight - 2 * kMarginY -
+                             2 * kVerticalPadding - titleHeight -
+                             connectButtonHeight;
+  NSRect scrollFrame =
+      NSMakeRect(kMarginX, kMarginY + connectButtonHeight + kVerticalPadding,
+                 scrollViewWidth, scrollViewHeight);
+  scrollView_.reset([[NSScrollView alloc] initWithFrame:scrollFrame]);
+  [scrollView_ setBorderType:NSBezelBorder];
+  [scrollView_ setHasVerticalScroller:YES];
+  [scrollView_ setHasHorizontalScroller:YES];
+  [scrollView_ setAutohidesScrollers:YES];
+
+  // TableView.
+  tableView_.reset([[NSTableView alloc] initWithFrame:NSZeroRect]);
+  tableColumn_.reset([[NSTableColumn alloc] initWithIdentifier:@""]);
+  [tableView_ addTableColumn:tableColumn_];
+  [tableView_ setDelegate:self];
+  [tableView_ setDataSource:self];
+  // Make the column title invisible.
+  [tableView_ setHeaderView:nil];
+  [tableView_ setFocusRingType:NSFocusRingTypeNone];
+
+  [scrollView_ setDocumentView:tableView_];
+  [view addSubview:scrollView_];
+
+  // Set connect button and cancel button to the right place.
+  CGFloat connectButtonOriginX = kChooserBubbleWidth - kMarginX -
+                                 kHorizontalPadding - connectButtonWidth -
+                                 cancelButtonWidth;
+  CGFloat connectButtonOriginY = kMarginY;
+  [connectButton_
+      setFrameOrigin:NSMakePoint(connectButtonOriginX, connectButtonOriginY)];
+  [connectButton_ setEnabled:NO];
+  [view addSubview:connectButton_];
+
+  CGFloat cancelButtonOriginX =
+      kChooserBubbleWidth - kMarginX - cancelButtonWidth;
+  CGFloat cancelButtonOriginY = kMarginY;
+  [cancelButton_
+      setFrameOrigin:NSMakePoint(cancelButtonOriginX, cancelButtonOriginY)];
+  [view addSubview:cancelButton_];
+
+  bubbleFrame = [[self window] frameRectForContentRect:bubbleFrame];
+  if ([[self window] isVisible]) {
+    // Unfortunately, calling -setFrame followed by -setFrameOrigin  (called
+    // within -setAnchorPoint) causes flickering.  Avoid the flickering by
+    // manually adjusting the new frame's origin so that the top left stays the
+    // same, and only calling -setFrame.
+    NSRect currentWindowFrame = [[self window] frame];
+    bubbleFrame.origin = currentWindowFrame.origin;
+    bubbleFrame.origin.y = bubbleFrame.origin.y +
+                           currentWindowFrame.size.height -
+                           bubbleFrame.size.height;
+    [[self window] setFrame:bubbleFrame display:YES];
+  } else {
+    [[self window] setFrame:bubbleFrame display:NO];
+    [self setAnchorPoint:[self getExpectedAnchorPoint]];
+    [self showWindow:nil];
+    [[self window] makeFirstResponder:nil];
+    [[self window] setInitialFirstResponder:connectButton_.get()];
+  }
+}
+
+- (NSInteger)numberOfRowsInTableView:(NSTableView*)tableView {
+  const std::vector<base::string16>& device_names =
+      chooser_bubble_delegate_->GetOptions();
+  if (device_names.empty()) {
+    return 1;
+  } else {
+    return static_cast<NSInteger>(device_names.size());
+  }
+}
+
+- (id)tableView:(NSTableView*)tableView
+    objectValueForTableColumn:(NSTableColumn*)tableColumn
+                          row:(NSInteger)rowIndex {
+  const std::vector<base::string16>& device_names =
+      chooser_bubble_delegate_->GetOptions();
+  if (device_names.empty()) {
+    DCHECK(rowIndex == 0);
+    return l10n_util::GetNSString(IDS_CHOOSER_BUBBLE_NO_DEVICES_FOUND_PROMPT);
+  } else {
+    if (rowIndex >= 0 && rowIndex < static_cast<int>(device_names.size())) {

[palmer, 2015/12/10 23:26:10]

int nit: should be static_cast<NSInteger>.

[juncai, 2015/12/11 20:39:46]

Done.

+      return base::SysUTF16ToNSString(device_names[rowIndex]);
+    } else {
+      return @"";
+    }
+  }
+}
+
+- (BOOL)tableView:(NSTableView*)aTableView
+    shouldEditTableColumn:(NSTableColumn*)aTableColumn
+                      row:(NSInteger)rowIndex {
+  return NO;
+}
+
+- (void)onOptionsInitialized {
+  [self updateTableView];
+}
+
+- (void)onOptionAdded:(NSInteger)index {
+  [self updateTableView];
+}
+
+- (void)onOptionRemoved:(NSInteger)index {
+  // Table view will automatically selects the next item if the current
+  // item is removed, so here it tracks if the removed item is the item
+  // that was previously selected, if so, deselect it.
+  if ([tableView_ selectedRow] == index)
+    [tableView_ deselectRow:index];
+
+  [self updateTableView];
+}
+
+- (void)updateTableView {
+  const std::vector<base::string16>& device_names =
+      chooser_bubble_delegate_->GetOptions();
+  [tableView_ setEnabled:!device_names.empty()];
+
+  CGFloat tableColumnWidth = 0.0f;
+  if (device_names.empty()) {
+    [tableView_ setEnabled:NO];
+    NSString* text =
+        l10n_util::GetNSString(IDS_CHOOSER_BUBBLE_NO_DEVICES_FOUND_PROMPT);
+    CGSize textSize = [text sizeWithAttributes:@{
+      NSFontAttributeName : [NSFont systemFontOfSize:[NSFont systemFontSize]]
+    }];
+    tableColumnWidth = textSize.width;
+  } else {
+    [tableView_ setEnabled:YES];
+    for (const auto& device_name : device_names) {
+      NSString* text = base::SysUTF16ToNSString(device_name);
+      CGSize textSize = [text sizeWithAttributes:@{
+        NSFontAttributeName : [NSFont systemFontOfSize:[NSFont systemFontSize]]
+      }];
+      tableColumnWidth = std::max(tableColumnWidth, textSize.width);
+    }
+  }
+  [tableColumn_ setWidth:tableColumnWidth];
+
+  [tableView_ reloadData];
+}
+
+- (void)tableViewSelectionDidChange:(NSNotification*)aNotification {
+  [connectButton_ setEnabled:[tableView_ numberOfSelectedRows] > 0];
+}
+
+- (void)updateAnchorPosition {
+  [self setParentWindow:[self getExpectedParentWindow]];
+  [self setAnchorPoint:[self getExpectedAnchorPoint]];
+}
+
+- (NSPoint)getExpectedAnchorPoint {
+  NSPoint anchor;
+  if ([self hasLocationBar]) {
+    LocationBarViewMac* location_bar =
+        [[[self getExpectedParentWindow] windowController] locationBarBridge];
+    anchor = location_bar->GetPageInfoBubblePoint();
+  } else {
+    // Center the bubble if there's no location bar.
+    NSRect contentFrame = [[[self getExpectedParentWindow] contentView] frame];
+    anchor = NSMakePoint(NSMidX(contentFrame), NSMaxY(contentFrame));
+  }
+
+  return [[self getExpectedParentWindow] convertBaseToScreen:anchor];
+}
+
+- (bool)hasLocationBar {
+  return browser_->SupportsWindowFeature(Browser::FEATURE_LOCATIONBAR);
+}
+
+- (info_bubble::BubbleArrowLocation)getExpectedArrowLocation {
+  return [self hasLocationBar] ? info_bubble::kTopLeft : info_bubble::kNoArrow;
+}
+
+- (NSWindow*)getExpectedParentWindow {
+  DCHECK(browser_->window());
+  return browser_->window()->GetNativeWindow();
+}
+
+- (base::scoped_nsobject<NSTextField>)bubbleTitle {
+  base::scoped_nsobject<NSTextField> titleView(
+      [[NSTextField alloc] initWithFrame:NSZeroRect]);
+  [titleView setDrawsBackground:NO];
+  [titleView setBezeled:NO];
+  [titleView setEditable:NO];
+  [titleView setSelectable:NO];
+  [titleView setStringValue:l10n_util::GetNSString(IDS_CHOOSER_BUBBLE_PROMPT)];
+  [titleView setFont:[NSFont systemFontOfSize:[NSFont systemFontSize]]];
+  [titleView sizeToFit];
+  NSRect titleFrame = [titleView frame];
+  [titleView setFrameSize:NSMakeSize(NSWidth(titleFrame) + kTitlePaddingX,
+                                     NSHeight(titleFrame))];
+  return titleView;
+}
+
+- (base::scoped_nsobject<NSButton>)closeButton {
+  int dimension = chrome_style::GetCloseButtonSize();
+  NSRect frame = NSMakeRect(0, 0, dimension, dimension);
+  base::scoped_nsobject<NSButton> button(
+      [[WebUIHoverCloseButton alloc] initWithFrame:frame]);
+  [button setAction:@selector(onClose:)];
+  [button setTarget:self];
+  return button;
+}
+
+- (base::scoped_nsobject<NSButton>)buttonWithTitle:(NSString*)title
+                                            action:(SEL)action {
+  base::scoped_nsobject<NSButton> button(
+      [[ConstrainedWindowButton alloc] initWithFrame:NSZeroRect]);
+  [button setButtonType:NSMomentaryPushInButton];
+  [button setTitle:title];
+  [button setTarget:self];
+  [button setAction:action];
+  [button sizeToFit];
+  return button;
+}
+
+- (base::scoped_nsobject<NSButton>)connectButton {
+  NSString* connectTitle =
+      l10n_util::GetNSString(IDS_CHOOSER_BUBBLE_CONNECT_BUTTON_TEXT);
+  return [self buttonWithTitle:connectTitle action:@selector(onConnect:)];
+}
+
+- (base::scoped_nsobject<NSButton>)cancelButton {
+  NSString* cancelTitle =
+      l10n_util::GetNSString(IDS_CHOOSER_BUBBLE_CANCEL_BUTTON_TEXT);
+  return [self buttonWithTitle:cancelTitle action:@selector(onCancel:)];
+}
+
++ (CGFloat)matchWidthsOf:(NSView*)viewA andOf:(NSView*)viewB {
+  NSRect frameA = [viewA frame];
+  NSRect frameB = [viewB frame];
+  CGFloat width = std::max(NSWidth(frameA), NSWidth(frameB));
+  [viewA setFrameSize:NSMakeSize(width, NSHeight(frameA))];
+  [viewB setFrameSize:NSMakeSize(width, NSHeight(frameB))];
+  return width;
+}
+
++ (void)alignCenterOf:(NSView*)viewA verticallyToCenterOf:(NSView*)viewB {
+  NSRect frameA = [viewA frame];
+  NSRect frameB = [viewB frame];
+  frameA.origin.y =
+      NSMinY(frameB) + std::floor((NSHeight(frameB) - NSHeight(frameA)) / 2);
+  [viewA setFrameOrigin:frameA.origin];
+}
+
+- (void)onConnect:(id)sender {
+  NSInteger row = [tableView_ selectedRow];
+  chooser_bubble_delegate_->Select(row);
+  [self close];
+}
+
+- (void)onCancel:(id)sender {
+  chooser_bubble_delegate_->Cancel();
+  [self close];
+}
+
+- (void)onClose:(id)sender {
+  chooser_bubble_delegate_->Close();
+  [self close];
+}
+
+@end
+
+ChooserBubbleUiCocoa::ChooserBubbleUiCocoa(
+    Browser* browser,
+    ChooserBubbleDelegate* chooser_bubble_delegate)
+    : browser_(browser),
+      chooser_bubble_delegate_(chooser_bubble_delegate),
+      chooser_bubble_ui_controller_(nil) {
+  DCHECK(browser);
+  DCHECK(chooser_bubble_delegate);
+  chooser_bubble_delegate_->set_observer(this);
+}
+
+ChooserBubbleUiCocoa::~ChooserBubbleUiCocoa() {
+  chooser_bubble_delegate_->set_observer(nullptr);
+  if (chooser_bubble_ui_controller_) {
+    [chooser_bubble_ui_controller_ close];
+    chooser_bubble_ui_controller_ = nil;
+  }
+}
+
+void ChooserBubbleUiCocoa::Show(BubbleReference bubble_reference) {
+  if (!chooser_bubble_ui_controller_) {
+    chooser_bubble_ui_controller_ = [[ChooserBubbleUiController alloc]
+                      initWithBrowser:browser_
+        initWithChooserBubbleDelegate:chooser_bubble_delegate_
+                               bridge:this];
+  }
+
+  [chooser_bubble_ui_controller_ show];
+  [chooser_bubble_ui_controller_ updateTableView];
+}
+
+void ChooserBubbleUiCocoa::Close() {
+  if (chooser_bubble_ui_controller_) {
+    [chooser_bubble_ui_controller_ close];
+    chooser_bubble_ui_controller_ = nil;
+  }
+}
+
+void ChooserBubbleUiCocoa::UpdateAnchorPosition() {
+  [chooser_bubble_ui_controller_ updateAnchorPosition];
+}
+
+void ChooserBubbleUiCocoa::OnOptionsInitialized() {
+  [chooser_bubble_ui_controller_ onOptionsInitialized];
+}
+
+void ChooserBubbleUiCocoa::OnOptionAdded(int index) {
+  [chooser_bubble_ui_controller_ onOptionAdded:index];
+}
+
+void ChooserBubbleUiCocoa::OnOptionRemoved(int index) {
+  [chooser_bubble_ui_controller_ onOptionRemoved:index];
+}
+
+void ChooserBubbleUiCocoa::OnBubbleClosing() {
+  chooser_bubble_ui_controller_ = nil;
+}