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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #import "ui/app_list/cocoa/apps_grid_controller.h" | |
| 6 | |
| 7 #include "base/command_line.h" | |
| 8 #include "base/mac/foundation_util.h" | |
| 9 #include "base/macros.h" | |
| 10 #include "ui/app_list/app_list_item.h" | |
| 11 #include "ui/app_list/app_list_model.h" | |
| 12 #include "ui/app_list/app_list_model_observer.h" | |
| 13 #include "ui/app_list/app_list_view_delegate.h" | |
| 14 #import "ui/app_list/cocoa/apps_collection_view_drag_manager.h" | |
| 15 #import "ui/app_list/cocoa/apps_grid_view_item.h" | |
| 16 #import "ui/app_list/cocoa/apps_pagination_model_observer.h" | |
| 17 #include "ui/base/models/list_model_observer.h" | |
| 18 | |
| 19 namespace { | |
| 20 | |
| 21 // OSX app list has hardcoded columns for now. | |
| 22 const int kFixedColumns = 4; | |
| 23 | |
| 24 // Padding space in pixels for fixed layout. | |
| 25 const CGFloat kGridTopPadding = 1; | |
| 26 const CGFloat kLeftRightPadding = 21; | |
| 27 const CGFloat kScrollerPadding = 16; | |
| 28 | |
| 29 // Preferred tile size when showing in fixed layout. These should be even | |
| 30 // numbers to ensure that if they are grown 50% they remain integers. | |
| 31 const CGFloat kPreferredTileWidth = 88; | |
| 32 const CGFloat kPreferredTileHeight = 98; | |
| 33 | |
| 34 const CGFloat kViewWidth = | |
| 35 kFixedColumns * kPreferredTileWidth + 2 * kLeftRightPadding; | |
| 36 | |
| 37 const NSTimeInterval kScrollWhileDraggingDelay = 1.0; | |
| 38 NSTimeInterval g_scroll_duration = 0.18; | |
| 39 | |
| 40 const char kTestType[] = "test-type"; | |
| 41 | |
| 42 int DetermineFixedRowCount() { | |
| 43 // This needs to be called before a delegate exists, since it is needed to | |
| 44 // determine the height of the view. | |
| 45 return [AppsGridController hasFewerRows] ? 3 : 4; | |
| 46 } | |
| 47 | |
| 48 int RowCount() { | |
| 49 static const int row_count = DetermineFixedRowCount(); | |
| 50 return row_count; | |
| 51 } | |
| 52 | |
| 53 int ItemsPerPage() { | |
| 54 return RowCount() * kFixedColumns; | |
| 55 } | |
| 56 | |
| 57 CGFloat ViewHeight() { | |
| 58 return RowCount() * kPreferredTileHeight; | |
| 59 } | |
| 60 | |
| 61 } // namespace | |
| 62 | |
| 63 @interface AppsGridController () | |
| 64 | |
| 65 - (void)scrollToPageWithTimer:(size_t)targetPage; | |
| 66 - (void)onTimer:(NSTimer*)theTimer; | |
| 67 | |
| 68 // Cancel a currently running scroll animation. | |
| 69 - (void)cancelScrollAnimation; | |
| 70 | |
| 71 // Index of the page with the most content currently visible. | |
| 72 - (size_t)nearestPageIndex; | |
| 73 | |
| 74 // Bootstrap the views this class controls. | |
| 75 - (void)loadAndSetView; | |
| 76 | |
| 77 - (void)boundsDidChange:(NSNotification*)notification; | |
| 78 | |
| 79 // Action for buttons in the grid. | |
| 80 - (void)onItemClicked:(id)sender; | |
| 81 | |
| 82 - (AppsGridViewItem*)itemAtPageIndex:(size_t)pageIndex | |
| 83 indexInPage:(size_t)indexInPage; | |
| 84 | |
| 85 // Return the button of the selected item. | |
| 86 - (NSButton*)selectedButton; | |
| 87 | |
| 88 // The scroll view holding the grid pages. | |
| 89 - (NSScrollView*)gridScrollView; | |
| 90 | |
| 91 - (NSView*)pagesContainerView; | |
| 92 | |
| 93 // Create any new pages after updating |items_|. | |
| 94 - (void)updatePages:(size_t)startItemIndex; | |
| 95 | |
| 96 - (void)updatePageContent:(size_t)pageIndex | |
| 97 resetModel:(BOOL)resetModel; | |
| 98 | |
| 99 // Bridged methods for AppListItemListObserver. | |
| 100 - (void)listItemAdded:(size_t)index | |
| 101 item:(app_list::AppListItem*)item; | |
| 102 | |
| 103 - (void)listItemRemoved:(size_t)index; | |
| 104 | |
| 105 - (void)listItemMovedFromIndex:(size_t)fromIndex | |
| 106 toModelIndex:(size_t)toIndex; | |
| 107 | |
| 108 // Moves the selection by |indexDelta| items. | |
| 109 - (BOOL)moveSelectionByDelta:(int)indexDelta; | |
| 110 | |
| 111 @end | |
| 112 | |
| 113 namespace app_list { | |
| 114 | |
| 115 class AppsGridDelegateBridge : public AppListItemListObserver { | |
| 116 public: | |
| 117 AppsGridDelegateBridge(AppsGridController* parent) : parent_(parent) {} | |
| 118 | |
| 119 private: | |
| 120 // Overridden from AppListItemListObserver: | |
| 121 void OnListItemAdded(size_t index, AppListItem* item) override { | |
| 122 [parent_ listItemAdded:index | |
| 123 item:item]; | |
| 124 } | |
| 125 void OnListItemRemoved(size_t index, AppListItem* item) override { | |
| 126 [parent_ listItemRemoved:index]; | |
| 127 } | |
| 128 void OnListItemMoved(size_t from_index, | |
| 129 size_t to_index, | |
| 130 AppListItem* item) override { | |
| 131 [parent_ listItemMovedFromIndex:from_index | |
| 132 toModelIndex:to_index]; | |
| 133 } | |
| 134 void OnAppListItemHighlight(size_t index, bool highlight) override { | |
| 135 // NSCollectionView (or -[AppsGridController scrollToPage]) ensures only one | |
| 136 // item is highlighted, so clearing a highlight isn't necessary. | |
| 137 if (!highlight) | |
| 138 return; | |
| 139 | |
| 140 [parent_ selectItemAtIndex:index]; | |
| 141 [parent_ scrollToPage:index / ItemsPerPage()]; | |
| 142 } | |
| 143 | |
| 144 AppsGridController* parent_; // Weak, owns us. | |
| 145 | |
| 146 DISALLOW_COPY_AND_ASSIGN(AppsGridDelegateBridge); | |
| 147 }; | |
| 148 | |
| 149 } // namespace app_list | |
| 150 | |
| 151 @interface PageContainerView : NSView; | |
| 152 @end | |
| 153 | |
| 154 // The container view needs to flip coordinates so that it is laid out | |
| 155 // correctly whether or not there is a horizontal scrollbar. | |
| 156 @implementation PageContainerView | |
| 157 | |
| 158 - (BOOL)isFlipped { | |
| 159 return YES; | |
| 160 } | |
| 161 | |
| 162 @end | |
| 163 | |
| 164 @implementation AppsGridController | |
| 165 | |
| 166 + (void)setScrollAnimationDuration:(NSTimeInterval)duration { | |
| 167 g_scroll_duration = duration; | |
| 168 } | |
| 169 | |
| 170 + (CGFloat)scrollerPadding { | |
| 171 return kScrollerPadding; | |
| 172 } | |
| 173 | |
| 174 + (BOOL)hasFewerRows { | |
| 175 return !base::CommandLine::ForCurrentProcess()->HasSwitch(kTestType); | |
| 176 } | |
| 177 | |
| 178 @synthesize paginationObserver = paginationObserver_; | |
| 179 | |
| 180 - (id)init { | |
| 181 if ((self = [super init])) { | |
| 182 bridge_.reset(new app_list::AppsGridDelegateBridge(self)); | |
| 183 NSSize cellSize = NSMakeSize(kPreferredTileWidth, kPreferredTileHeight); | |
| 184 dragManager_.reset([[AppsCollectionViewDragManager alloc] | |
| 185 initWithCellSize:cellSize | |
| 186 rows:RowCount() | |
| 187 columns:kFixedColumns | |
| 188 gridController:self]); | |
| 189 pages_.reset([[NSMutableArray alloc] init]); | |
| 190 items_.reset([[NSMutableArray alloc] init]); | |
| 191 [self loadAndSetView]; | |
| 192 [self updatePages:0]; | |
| 193 } | |
| 194 return self; | |
| 195 } | |
| 196 | |
| 197 - (void)dealloc { | |
| 198 [[NSNotificationCenter defaultCenter] removeObserver:self]; | |
| 199 [super dealloc]; | |
| 200 } | |
| 201 | |
| 202 - (NSCollectionView*)collectionViewAtPageIndex:(size_t)pageIndex { | |
| 203 return [pages_ objectAtIndex:pageIndex]; | |
| 204 } | |
| 205 | |
| 206 - (size_t)pageIndexForCollectionView:(NSCollectionView*)page { | |
| 207 for (size_t pageIndex = 0; pageIndex < [pages_ count]; ++pageIndex) { | |
| 208 if (page == [self collectionViewAtPageIndex:pageIndex]) | |
| 209 return pageIndex; | |
| 210 } | |
| 211 return NSNotFound; | |
| 212 } | |
| 213 | |
| 214 - (app_list::AppListModel*)model { | |
| 215 return delegate_ ? delegate_->GetModel() : NULL; | |
| 216 } | |
| 217 | |
| 218 - (void)setDelegate:(app_list::AppListViewDelegate*)newDelegate { | |
| 219 if (delegate_) { | |
| 220 app_list::AppListModel* oldModel = delegate_->GetModel(); | |
| 221 if (oldModel) | |
| 222 oldModel->top_level_item_list()->RemoveObserver(bridge_.get()); | |
| 223 } | |
| 224 | |
| 225 // Since the old model may be getting deleted, and the AppKit objects might | |
| 226 // be sitting in an NSAutoreleasePool, ensure there are no references to | |
| 227 // the model. | |
| 228 for (size_t i = 0; i < [items_ count]; ++i) | |
| 229 [[self itemAtIndex:i] setModel:NULL]; | |
| 230 | |
| 231 [items_ removeAllObjects]; | |
| 232 [self updatePages:0]; | |
| 233 [self scrollToPage:0]; | |
| 234 | |
| 235 delegate_ = newDelegate; | |
| 236 if (!delegate_) | |
| 237 return; | |
| 238 | |
| 239 app_list::AppListModel* newModel = delegate_->GetModel(); | |
| 240 if (!newModel) | |
| 241 return; | |
| 242 | |
| 243 newModel->top_level_item_list()->AddObserver(bridge_.get()); | |
| 244 for (size_t i = 0; i < newModel->top_level_item_list()->item_count(); ++i) { | |
| 245 app_list::AppListItem* itemModel = | |
| 246 newModel->top_level_item_list()->item_at(i); | |
| 247 [items_ insertObject:[NSValue valueWithPointer:itemModel] | |
| 248 atIndex:i]; | |
| 249 } | |
| 250 [self updatePages:0]; | |
| 251 } | |
| 252 | |
| 253 - (size_t)visiblePage { | |
| 254 return visiblePage_; | |
| 255 } | |
| 256 | |
| 257 - (void)activateSelection { | |
| 258 [[self selectedButton] performClick:self]; | |
| 259 } | |
| 260 | |
| 261 - (size_t)pageCount { | |
| 262 return [pages_ count]; | |
| 263 } | |
| 264 | |
| 265 - (size_t)itemCount { | |
| 266 return [items_ count]; | |
| 267 } | |
| 268 | |
| 269 - (void)scrollToPage:(size_t)pageIndex { | |
| 270 NSClipView* clipView = [[self gridScrollView] contentView]; | |
| 271 NSPoint newOrigin = [clipView bounds].origin; | |
| 272 | |
| 273 // Scrolling outside of this range is edge elasticity, which animates | |
| 274 // automatically. | |
| 275 if ((pageIndex == 0 && (newOrigin.x <= 0)) || | |
| 276 (pageIndex + 1 == [self pageCount] && | |
| 277 newOrigin.x >= pageIndex * kViewWidth)) { | |
| 278 return; | |
| 279 } | |
| 280 | |
| 281 // Clear any selection on the current page (unless it has been removed). | |
| 282 if (visiblePage_ < [pages_ count]) { | |
| 283 [[self collectionViewAtPageIndex:visiblePage_] | |
| 284 setSelectionIndexes:[NSIndexSet indexSet]]; | |
| 285 } | |
| 286 | |
| 287 newOrigin.x = pageIndex * kViewWidth; | |
| 288 [NSAnimationContext beginGrouping]; | |
| 289 [[NSAnimationContext currentContext] setDuration:g_scroll_duration]; | |
| 290 [[clipView animator] setBoundsOrigin:newOrigin]; | |
| 291 [NSAnimationContext endGrouping]; | |
| 292 animatingScroll_ = YES; | |
| 293 targetScrollPage_ = pageIndex; | |
| 294 [self cancelScrollTimer]; | |
| 295 } | |
| 296 | |
| 297 - (void)maybeChangePageForPoint:(NSPoint)locationInWindow { | |
| 298 NSPoint pointInView = [[self view] convertPoint:locationInWindow | |
| 299 fromView:nil]; | |
| 300 // Check if the point is outside the view on the left or right. | |
| 301 if (pointInView.x <= 0 || pointInView.x >= NSWidth([[self view] bounds])) { | |
| 302 size_t targetPage = visiblePage_; | |
| 303 if (pointInView.x <= 0) | |
| 304 targetPage -= targetPage != 0 ? 1 : 0; | |
| 305 else | |
| 306 targetPage += targetPage < [pages_ count] - 1 ? 1 : 0; | |
| 307 [self scrollToPageWithTimer:targetPage]; | |
| 308 return; | |
| 309 } | |
| 310 | |
| 311 if (paginationObserver_) { | |
| 312 NSInteger segment = | |
| 313 [paginationObserver_ pagerSegmentAtLocation:locationInWindow]; | |
| 314 if (segment >= 0 && static_cast<size_t>(segment) != targetScrollPage_) { | |
| 315 [self scrollToPageWithTimer:segment]; | |
| 316 return; | |
| 317 } | |
| 318 } | |
| 319 | |
| 320 // Otherwise the point may have moved back into the view. | |
| 321 [self cancelScrollTimer]; | |
| 322 } | |
| 323 | |
| 324 - (void)cancelScrollTimer { | |
| 325 scheduledScrollPage_ = targetScrollPage_; | |
| 326 [scrollWhileDraggingTimer_ invalidate]; | |
| 327 } | |
| 328 | |
| 329 - (void)scrollToPageWithTimer:(size_t)targetPage { | |
| 330 if (targetPage == targetScrollPage_) { | |
| 331 [self cancelScrollTimer]; | |
| 332 return; | |
| 333 } | |
| 334 | |
| 335 if (targetPage == scheduledScrollPage_) | |
| 336 return; | |
| 337 | |
| 338 scheduledScrollPage_ = targetPage; | |
| 339 [scrollWhileDraggingTimer_ invalidate]; | |
| 340 scrollWhileDraggingTimer_.reset( | |
| 341 [[NSTimer scheduledTimerWithTimeInterval:kScrollWhileDraggingDelay | |
| 342 target:self | |
| 343 selector:@selector(onTimer:) | |
| 344 userInfo:nil | |
| 345 repeats:NO] retain]); | |
| 346 } | |
| 347 | |
| 348 - (void)onTimer:(NSTimer*)theTimer { | |
| 349 if (scheduledScrollPage_ == targetScrollPage_) | |
| 350 return; // Already animating scroll. | |
| 351 | |
| 352 [self scrollToPage:scheduledScrollPage_]; | |
| 353 } | |
| 354 | |
| 355 - (void)cancelScrollAnimation { | |
| 356 NSClipView* clipView = [[self gridScrollView] contentView]; | |
| 357 [NSAnimationContext beginGrouping]; | |
| 358 [[NSAnimationContext currentContext] setDuration:0]; | |
| 359 [[clipView animator] setBoundsOrigin:[clipView bounds].origin]; | |
| 360 [NSAnimationContext endGrouping]; | |
| 361 animatingScroll_ = NO; | |
| 362 } | |
| 363 | |
| 364 - (size_t)nearestPageIndex { | |
| 365 return lround( | |
| 366 NSMinX([[[self gridScrollView] contentView] bounds]) / kViewWidth); | |
| 367 } | |
| 368 | |
| 369 - (void)userScrolling:(BOOL)isScrolling { | |
| 370 if (isScrolling) { | |
| 371 if (animatingScroll_) | |
| 372 [self cancelScrollAnimation]; | |
| 373 } else { | |
| 374 [self scrollToPage:[self nearestPageIndex]]; | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 - (void)loadAndSetView { | |
| 379 base::scoped_nsobject<PageContainerView> pagesContainer( | |
| 380 [[PageContainerView alloc] initWithFrame:NSZeroRect]); | |
| 381 | |
| 382 NSRect scrollFrame = NSMakeRect(0, kGridTopPadding, kViewWidth, | |
| 383 ViewHeight() + kScrollerPadding); | |
| 384 base::scoped_nsobject<ScrollViewWithNoScrollbars> scrollView( | |
| 385 [[ScrollViewWithNoScrollbars alloc] initWithFrame:scrollFrame]); | |
| 386 [scrollView setBorderType:NSNoBorder]; | |
| 387 [scrollView setLineScroll:kViewWidth]; | |
| 388 [scrollView setPageScroll:kViewWidth]; | |
| 389 [scrollView setDelegate:self]; | |
| 390 [scrollView setDocumentView:pagesContainer]; | |
| 391 [scrollView setDrawsBackground:NO]; | |
| 392 | |
| 393 [[NSNotificationCenter defaultCenter] | |
| 394 addObserver:self | |
| 395 selector:@selector(boundsDidChange:) | |
| 396 name:NSViewBoundsDidChangeNotification | |
| 397 object:[scrollView contentView]]; | |
| 398 | |
| 399 [self setView:scrollView]; | |
| 400 } | |
| 401 | |
| 402 - (void)boundsDidChange:(NSNotification*)notification { | |
| 403 size_t newPage = [self nearestPageIndex]; | |
| 404 if (newPage == visiblePage_) { | |
| 405 [paginationObserver_ pageVisibilityChanged]; | |
| 406 return; | |
| 407 } | |
| 408 | |
| 409 visiblePage_ = newPage; | |
| 410 [paginationObserver_ selectedPageChanged:newPage]; | |
| 411 [paginationObserver_ pageVisibilityChanged]; | |
| 412 } | |
| 413 | |
| 414 - (void)onItemClicked:(id)sender { | |
| 415 for (size_t i = 0; i < [items_ count]; ++i) { | |
| 416 AppsGridViewItem* gridItem = [self itemAtIndex:i]; | |
| 417 if ([[gridItem button] isEqual:sender]) | |
| 418 [gridItem model]->Activate(0); | |
| 419 } | |
| 420 } | |
| 421 | |
| 422 - (AppsGridViewItem*)itemAtPageIndex:(size_t)pageIndex | |
| 423 indexInPage:(size_t)indexInPage { | |
| 424 return base::mac::ObjCCastStrict<AppsGridViewItem>( | |
| 425 [[self collectionViewAtPageIndex:pageIndex] itemAtIndex:indexInPage]); | |
| 426 } | |
| 427 | |
| 428 - (AppsGridViewItem*)itemAtIndex:(size_t)itemIndex { | |
| 429 const size_t pageIndex = itemIndex / ItemsPerPage(); | |
| 430 return [self itemAtPageIndex:pageIndex | |
| 431 indexInPage:itemIndex - pageIndex * ItemsPerPage()]; | |
| 432 } | |
| 433 | |
| 434 - (NSUInteger)selectedItemIndex { | |
| 435 NSCollectionView* page = [self collectionViewAtPageIndex:visiblePage_]; | |
| 436 NSUInteger indexOnPage = [[page selectionIndexes] firstIndex]; | |
| 437 if (indexOnPage == NSNotFound) | |
| 438 return NSNotFound; | |
| 439 | |
| 440 return indexOnPage + visiblePage_ * ItemsPerPage(); | |
| 441 } | |
| 442 | |
| 443 - (NSButton*)selectedButton { | |
| 444 NSUInteger index = [self selectedItemIndex]; | |
| 445 if (index == NSNotFound) | |
| 446 return nil; | |
| 447 | |
| 448 return [[self itemAtIndex:index] button]; | |
| 449 } | |
| 450 | |
| 451 - (NSScrollView*)gridScrollView { | |
| 452 return base::mac::ObjCCastStrict<NSScrollView>([self view]); | |
| 453 } | |
| 454 | |
| 455 - (NSView*)pagesContainerView { | |
| 456 return [[self gridScrollView] documentView]; | |
| 457 } | |
| 458 | |
| 459 - (void)updatePages:(size_t)startItemIndex { | |
| 460 // Note there is always at least one page. | |
| 461 size_t targetPages = 1; | |
| 462 if ([items_ count] != 0) | |
| 463 targetPages = ([items_ count] - 1) / ItemsPerPage() + 1; | |
| 464 | |
| 465 const size_t currentPages = [self pageCount]; | |
| 466 // First see if the number of pages have changed. | |
| 467 if (targetPages != currentPages) { | |
| 468 if (targetPages < currentPages) { | |
| 469 // Pages need to be removed. | |
| 470 [pages_ removeObjectsInRange:NSMakeRange(targetPages, | |
| 471 currentPages - targetPages)]; | |
| 472 } else { | |
| 473 // Pages need to be added. | |
| 474 for (size_t i = currentPages; i < targetPages; ++i) { | |
| 475 NSRect pageFrame = NSMakeRect(kLeftRightPadding + kViewWidth * i, 0, | |
| 476 kViewWidth, ViewHeight()); | |
| 477 [pages_ addObject:[dragManager_ makePageWithFrame:pageFrame]]; | |
| 478 } | |
| 479 } | |
| 480 | |
| 481 [[self pagesContainerView] setSubviews:pages_]; | |
| 482 NSSize pagesSize = NSMakeSize(kViewWidth * targetPages, ViewHeight()); | |
| 483 [[self pagesContainerView] setFrameSize:pagesSize]; | |
| 484 [paginationObserver_ totalPagesChanged]; | |
| 485 } | |
| 486 | |
| 487 const size_t startPage = startItemIndex / ItemsPerPage(); | |
| 488 // All pages on or after |startPage| may need items added or removed. | |
| 489 for (size_t pageIndex = startPage; pageIndex < targetPages; ++pageIndex) { | |
| 490 [self updatePageContent:pageIndex | |
| 491 resetModel:YES]; | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 - (void)updatePageContent:(size_t)pageIndex | |
| 496 resetModel:(BOOL)resetModel { | |
| 497 NSCollectionView* pageView = [self collectionViewAtPageIndex:pageIndex]; | |
| 498 if (resetModel) { | |
| 499 // Clear the models first, otherwise removed items could be autoreleased at | |
| 500 // an unknown point in the future, when the model owner may have gone away. | |
| 501 for (size_t i = 0; i < [[pageView content] count]; ++i) { | |
| 502 AppsGridViewItem* gridItem = base::mac::ObjCCastStrict<AppsGridViewItem>( | |
| 503 [pageView itemAtIndex:i]); | |
| 504 [gridItem setModel:NULL]; | |
| 505 } | |
| 506 } | |
| 507 | |
| 508 NSRange inPageRange = NSIntersectionRange( | |
| 509 NSMakeRange(pageIndex * ItemsPerPage(), ItemsPerPage()), | |
| 510 NSMakeRange(0, [items_ count])); | |
| 511 NSArray* pageContent = [items_ subarrayWithRange:inPageRange]; | |
| 512 [pageView setContent:pageContent]; | |
| 513 if (!resetModel) | |
| 514 return; | |
| 515 | |
| 516 for (size_t i = 0; i < [pageContent count]; ++i) { | |
| 517 AppsGridViewItem* gridItem = base::mac::ObjCCastStrict<AppsGridViewItem>( | |
| 518 [pageView itemAtIndex:i]); | |
| 519 [gridItem setModel:static_cast<app_list::AppListItem*>( | |
| 520 [[pageContent objectAtIndex:i] pointerValue])]; | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 - (void)moveItemInView:(size_t)fromIndex | |
| 525 toItemIndex:(size_t)toIndex { | |
| 526 base::scoped_nsobject<NSValue> item( | |
| 527 [[items_ objectAtIndex:fromIndex] retain]); | |
| 528 [items_ removeObjectAtIndex:fromIndex]; | |
| 529 [items_ insertObject:item | |
| 530 atIndex:toIndex]; | |
| 531 | |
| 532 size_t fromPageIndex = fromIndex / ItemsPerPage(); | |
| 533 size_t toPageIndex = toIndex / ItemsPerPage(); | |
| 534 if (fromPageIndex == toPageIndex) { | |
| 535 [self updatePageContent:fromPageIndex | |
| 536 resetModel:NO]; // Just reorder items. | |
| 537 return; | |
| 538 } | |
| 539 | |
| 540 if (fromPageIndex > toPageIndex) | |
| 541 std::swap(fromPageIndex, toPageIndex); | |
| 542 | |
| 543 for (size_t i = fromPageIndex; i <= toPageIndex; ++i) { | |
| 544 [self updatePageContent:i | |
| 545 resetModel:YES]; | |
| 546 } | |
| 547 } | |
| 548 | |
| 549 // Compare with views implementation in AppsGridView::MoveItemInModel(). | |
| 550 - (void)moveItemWithIndex:(size_t)itemIndex | |
| 551 toModelIndex:(size_t)modelIndex { | |
| 552 // Ingore no-op moves. Note that this is always the case when canceled. | |
| 553 if (itemIndex == modelIndex) | |
| 554 return; | |
| 555 | |
| 556 app_list::AppListItemList* itemList = [self model]->top_level_item_list(); | |
| 557 itemList->RemoveObserver(bridge_.get()); | |
| 558 itemList->MoveItem(itemIndex, modelIndex); | |
| 559 itemList->AddObserver(bridge_.get()); | |
| 560 } | |
| 561 | |
| 562 - (AppsCollectionViewDragManager*)dragManager { | |
| 563 return dragManager_; | |
| 564 } | |
| 565 | |
| 566 - (size_t)scheduledScrollPage { | |
| 567 return scheduledScrollPage_; | |
| 568 } | |
| 569 | |
| 570 - (void)listItemAdded:(size_t)index | |
| 571 item:(app_list::AppListItem*)itemModel { | |
| 572 // Cancel any drag, to ensure the model stays consistent. | |
| 573 [dragManager_ cancelDrag]; | |
| 574 | |
| 575 [items_ insertObject:[NSValue valueWithPointer:itemModel] | |
| 576 atIndex:index]; | |
| 577 | |
| 578 [self updatePages:index]; | |
| 579 } | |
| 580 | |
| 581 - (void)listItemRemoved:(size_t)index { | |
| 582 [dragManager_ cancelDrag]; | |
| 583 | |
| 584 // Clear the models explicitly to avoid surprises from autorelease. | |
| 585 [[self itemAtIndex:index] setModel:NULL]; | |
| 586 | |
| 587 [items_ removeObjectsInRange:NSMakeRange(index, 1)]; | |
| 588 [self updatePages:index]; | |
| 589 } | |
| 590 | |
| 591 - (void)listItemMovedFromIndex:(size_t)fromIndex | |
| 592 toModelIndex:(size_t)toIndex { | |
| 593 [dragManager_ cancelDrag]; | |
| 594 [self moveItemInView:fromIndex | |
| 595 toItemIndex:toIndex]; | |
| 596 } | |
| 597 | |
| 598 - (CGFloat)visiblePortionOfPage:(int)page { | |
| 599 CGFloat scrollOffsetOfPage = | |
| 600 NSMinX([[[self gridScrollView] contentView] bounds]) / kViewWidth - page; | |
| 601 if (scrollOffsetOfPage <= -1.0 || scrollOffsetOfPage >= 1.0) | |
| 602 return 0.0; | |
| 603 | |
| 604 if (scrollOffsetOfPage <= 0.0) | |
| 605 return scrollOffsetOfPage + 1.0; | |
| 606 | |
| 607 return -1.0 + scrollOffsetOfPage; | |
| 608 } | |
| 609 | |
| 610 - (void)onPagerClicked:(AppListPagerView*)sender { | |
| 611 int selectedSegment = [sender selectedSegment]; | |
| 612 if (selectedSegment < 0) | |
| 613 return; // No selection. | |
| 614 | |
| 615 int pageIndex = [[sender cell] tagForSegment:selectedSegment]; | |
| 616 if (pageIndex >= 0) | |
| 617 [self scrollToPage:pageIndex]; | |
| 618 } | |
| 619 | |
| 620 - (BOOL)moveSelectionByDelta:(int)indexDelta { | |
| 621 if (indexDelta == 0) | |
| 622 return NO; | |
| 623 | |
| 624 NSUInteger oldIndex = [self selectedItemIndex]; | |
| 625 | |
| 626 // If nothing is currently selected, select the first item on the page. | |
| 627 if (oldIndex == NSNotFound) { | |
| 628 [self selectItemAtIndex:visiblePage_ * ItemsPerPage()]; | |
| 629 return YES; | |
| 630 } | |
| 631 | |
| 632 // Can't select a negative index. | |
| 633 if (indexDelta < 0 && static_cast<NSUInteger>(-indexDelta) > oldIndex) | |
| 634 return NO; | |
| 635 | |
| 636 // Can't select an index greater or equal to the number of items. | |
| 637 if (oldIndex + indexDelta >= [items_ count]) { | |
| 638 if (visiblePage_ == [pages_ count] - 1) | |
| 639 return NO; | |
| 640 | |
| 641 // If we're not on the last page, then select the last item. | |
| 642 [self selectItemAtIndex:[items_ count] - 1]; | |
| 643 return YES; | |
| 644 } | |
| 645 | |
| 646 [self selectItemAtIndex:oldIndex + indexDelta]; | |
| 647 return YES; | |
| 648 } | |
| 649 | |
| 650 - (void)selectItemAtIndex:(NSUInteger)index { | |
| 651 if (index >= [items_ count]) | |
| 652 return; | |
| 653 | |
| 654 if (index / ItemsPerPage() != visiblePage_) | |
| 655 [self scrollToPage:index / ItemsPerPage()]; | |
| 656 | |
| 657 [[self itemAtIndex:index] setSelected:YES]; | |
| 658 } | |
| 659 | |
| 660 - (BOOL)handleCommandBySelector:(SEL)command { | |
| 661 if (command == @selector(insertNewline:) || | |
| 662 command == @selector(insertLineBreak:)) { | |
| 663 [self activateSelection]; | |
| 664 return YES; | |
| 665 } | |
| 666 | |
| 667 NSUInteger oldIndex = [self selectedItemIndex]; | |
| 668 // If nothing is currently selected, select the first item on the page. | |
| 669 if (oldIndex == NSNotFound) { | |
| 670 [self selectItemAtIndex:visiblePage_ * ItemsPerPage()]; | |
| 671 return YES; | |
| 672 } | |
| 673 | |
| 674 if (command == @selector(moveLeft:)) { | |
| 675 return oldIndex % kFixedColumns == 0 | |
| 676 ? [self moveSelectionByDelta:-ItemsPerPage() + kFixedColumns - 1] | |
| 677 : [self moveSelectionByDelta:-1]; | |
| 678 } | |
| 679 | |
| 680 if (command == @selector(moveRight:)) { | |
| 681 return oldIndex % kFixedColumns == kFixedColumns - 1 | |
| 682 ? [self moveSelectionByDelta:+ItemsPerPage() - kFixedColumns + 1] | |
| 683 : [self moveSelectionByDelta:1]; | |
| 684 } | |
| 685 | |
| 686 if (command == @selector(moveUp:)) { | |
| 687 return oldIndex / kFixedColumns % RowCount() == 0 | |
| 688 ? NO | |
| 689 : [self moveSelectionByDelta:-kFixedColumns]; | |
| 690 } | |
| 691 | |
| 692 if (command == @selector(moveDown:)) { | |
| 693 return oldIndex / kFixedColumns % RowCount() == RowCount() - 1 | |
| 694 ? NO | |
| 695 : [self moveSelectionByDelta:kFixedColumns]; | |
| 696 } | |
| 697 | |
| 698 if (command == @selector(pageUp:) || | |
| 699 command == @selector(scrollPageUp:)) | |
| 700 return [self moveSelectionByDelta:-ItemsPerPage()]; | |
| 701 | |
| 702 if (command == @selector(pageDown:) || | |
| 703 command == @selector(scrollPageDown:)) | |
| 704 return [self moveSelectionByDelta:ItemsPerPage()]; | |
| 705 | |
| 706 return NO; | |
| 707 } | |
| 708 | |
| 709 @end | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2131463002:
Purge the App Launcher code from Mac (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master