Cocoa: Implement media gallery dialog

chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.mm

+// Copyright (c) 2012 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/cocoa/extensions/media_galleries_dialog_cocoa.h"
+
+#include "base/sys_string_conversions.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+const CGFloat kCheckboxMargin = 5;
+const CGFloat kCheckboxMaxWidth = 350;
+
+@interface MediaGalleriesCocoaController : NSObject {
+ @private
+  chrome::MediaGalleriesDialogCocoa* dialog_;
+}
+
+@property(nonatomic, assign) chrome::MediaGalleriesDialogCocoa* dialog;
+
+@end
+
+@implementation MediaGalleriesCocoaController
+
+@synthesize dialog = dialog_;
+
+- (void)onAddFolderClicked:(id)sender {
+  DCHECK(dialog_);
+  dialog_->OnAddFolderClicked();
+}
+
+- (void)onCheckboxToggled:(id)sender {
+  DCHECK(dialog_);
+  dialog_->OnCheckboxToggled(sender);
+}
+
+- (void)sheetDidEnd:(NSWindow*)parent
+         returnCode:(NSInteger)returnCode
+            context:(void*)context {
+  DCHECK(dialog_);
+  dialog_->SheetDidEnd(returnCode);
+}
+
+@end
+
+namespace chrome {
+
+MediaGalleriesDialogCocoa::MediaGalleriesDialogCocoa(
+    MediaGalleriesDialogController* controller,
+    MediaGalleriesCocoaController* cocoa_controller)
+    : ConstrainedWindowMacDelegateSystemSheet(
+          cocoa_controller, @selector(sheetDidEnd:returnCode:context:)),
+      controller_(controller),
+      window_(NULL),
+      accepted_(false),
+      cocoa_controller_([cocoa_controller retain]) {
+  [cocoa_controller_ setDialog:this];
+
+  alert_.reset([[NSAlert alloc] init]);
+  [alert_ setMessageText:base::SysUTF16ToNSString(controller_->GetHeader())];
+  [alert_ setInformativeText:SysUTF16ToNSString(controller_->GetSubtext())];
+  [alert_ addButtonWithTitle:l10n_util::GetNSString(
+      IDS_MEDIA_GALLERIES_DIALOG_CONFIRM)];
+  [alert_ addButtonWithTitle:l10n_util::GetNSString(
+      IDS_MEDIA_GALLERIES_DIALOG_CANCEL)];
+  [alert_ addButtonWithTitle:l10n_util::GetNSString(
+      IDS_MEDIA_GALLERIES_DIALOG_ADD_GALLERY)];
+
+  // Override the add button click handler to prevent the alert from closing.
+  NSButton* add_button = [[alert_ buttons] objectAtIndex:2];
+  [add_button setTarget:cocoa_controller_];
+  [add_button setAction:@selector(onAddFolderClicked:)];
+
+  // Add gallery permission checkboxes inside an accessory view.
+  checkbox_container_.reset([[NSView alloc] initWithFrame:NSZeroRect]);
+  checkboxes_.reset([[NSMutableArray alloc] init]);
+  const MediaGalleriesDialogController::KnownGalleryPermissions& permissions =
+      controller_->permissions();
+  for (MediaGalleriesDialogController::KnownGalleryPermissions::
+       const_reverse_iterator iter = permissions.rbegin();
+       iter != permissions.rend(); iter++) {
+    const MediaGalleriesDialogController::GalleryPermission& permission =
+        iter->second;
+    UpdateGalleryCheckbox(nil, &permission.pref_info, permission.allowed);
+  }
+  UpdateCheckboxContainerFrame();
+  [alert_ setAccessoryView:checkbox_container_];
+
+  // As a safeguard against the user skipping reading over the dialog and just
+  // confirming, the button will be unavailable for dialogs without any checks
+  // until the user toggles something.
+  [[[alert_ buttons] objectAtIndex:0] setEnabled:
+      controller_->HasPermittedGalleries()];
+
+  set_sheet(alert_);
+  window_ = new ConstrainedWindowMac(controller->tab_contents(), this);
+}
+
+MediaGalleriesDialogCocoa::~MediaGalleriesDialogCocoa() {
+}
+
+void MediaGalleriesDialogCocoa::OnAddFolderClicked() {
+  controller_->OnAddFolderClicked();
+}
+
+void MediaGalleriesDialogCocoa::OnCheckboxToggled(NSButton* checkbox) {
+ const MediaGalleriesDialogController::KnownGalleryPermissions& permissions =
+      controller_->permissions();
+  [[[alert_ buttons] objectAtIndex:0] setEnabled:YES];
+
+  for (MediaGalleriesDialogController::KnownGalleryPermissions::
+       const_reverse_iterator iter = permissions.rbegin();
+       iter != permissions.rend(); iter++) {
+    const MediaGalleryPrefInfo* gallery = &iter->second.pref_info;
+    NSString* device_id = base::SysUTF8ToNSString(gallery->device_id);
+    if ([[[checkbox cell] representedObject] isEqual:device_id]) {
+      controller_->DidToggleGallery(gallery, [checkbox state] == NSOnState);
+      break;
+    }
+  }
+}
+
+void MediaGalleriesDialogCocoa::SheetDidEnd(NSInteger result) {
+  switch (result) {
+    case NSAlertFirstButtonReturn:
+      accepted_ = true;
+      window_->CloseConstrainedWindow();
+      break;
+    case NSAlertSecondButtonReturn:
+      window_->CloseConstrainedWindow();
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+}
+
+void MediaGalleriesDialogCocoa::UpdateGalleryCheckbox(
+    NSButton* checkbox,
+    const MediaGalleryPrefInfo* gallery,
+    bool permitted) {
+  CGFloat y_pos = 0;
+  if (checkbox) {
+    y_pos = NSMinY([checkbox frame]);
+  } else {
+    if ([checkboxes_ count] > 0)
+      y_pos = NSMaxY([[checkboxes_ lastObject] frame]) + kCheckboxMargin;
+
+    scoped_nsobject<NSButton> new_checkbox(
+        [[NSButton alloc] initWithFrame:NSZeroRect]);
+    NSString* device_id = base::SysUTF8ToNSString(gallery->device_id);
+    [[new_checkbox cell] setRepresentedObject:device_id];
+    [[new_checkbox cell] setLineBreakMode:NSLineBreakByTruncatingMiddle];
+    [new_checkbox setButtonType:NSSwitchButton];
+    [new_checkbox setTarget:cocoa_controller_];
+    [new_checkbox setAction:@selector(onCheckboxToggled:)];
+
+    [checkbox_container_ addSubview:new_checkbox];
+    [checkboxes_ addObject:new_checkbox];
+    checkbox = new_checkbox.get();
+  }
+
+  [checkbox setTitle:base::SysUTF16ToNSString(gallery->display_name)];
+  [checkbox setToolTip:
+      base::SysUTF16ToNSString(gallery->path.LossyDisplayName())];
+  [checkbox setState:permitted ? NSOnState : NSOffState];
+
+  [checkbox sizeToFit];
+  NSRect rect = [checkbox bounds];
+  rect.origin.y = y_pos;
+  rect.size.width = std::min(NSWidth(rect), kCheckboxMaxWidth);
+  [checkbox setFrame:rect];
+}
+
+void MediaGalleriesDialogCocoa::UpdateCheckboxContainerFrame() {
+  NSRect rect = NSMakeRect(
+      0, 0, kCheckboxMaxWidth, NSMaxY([[checkboxes_ lastObject] frame]));
+  [checkbox_container_ setFrame:rect];
+}
+
+void MediaGalleriesDialogCocoa::UpdateGallery(
+    const MediaGalleryPrefInfo* gallery,
+    bool permitted) {
+  NSButton* checkbox = nil;
+  NSString* device_id = base::SysUTF8ToNSString(gallery->device_id);
+
+  for (NSButton* button in checkboxes_.get()) {
+    if ([[[button cell] representedObject] isEqual:device_id]) {
+      checkbox = button;
+      break;
+    }
+  }
+
+  UpdateGalleryCheckbox(checkbox, gallery, permitted);
+  UpdateCheckboxContainerFrame();
+  [alert_ layout];
+}
+
+void MediaGalleriesDialogCocoa::DeleteDelegate() {
+  // As required by ConstrainedWindowMacDelegate, close the sheet if
+  // it's still open.
+  if (is_sheet_open())
+    [NSApp endSheet:sheet()];
+
+  controller_->DialogFinished(accepted_);
+}
+
+// static
+MediaGalleriesDialog* MediaGalleriesDialog::Create(
+    MediaGalleriesDialogController* controller) {
+  scoped_nsobject<MediaGalleriesCocoaController> cocoa_controller(
+      [[MediaGalleriesCocoaController alloc] init]);
+  return new MediaGalleriesDialogCocoa(controller, cocoa_controller);
+}
+
+}  // namespace chrome