chrome/browser/ui/cocoa/url_drop_target.h

   1 // Copyright (c) 2011 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 #ifndef CHROME_BROWSER_UI_COCOA_URL_DROP_TARGET_H_
   6 #define CHROME_BROWSER_UI_COCOA_URL_DROP_TARGET_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9
  10 @protocol URLDropTarget;
  11 @protocol URLDropTargetController;
  12
  13 // Object which coordinates the dropping of URLs on a given view, sending data
  14 // and updates to a controller.
  15 @interface URLDropTargetHandler : NSObject {
  16  @private
  17   NSView<URLDropTarget>* view_;  // weak
  18 }
  19
  20 // Returns an array of drag types that can be handled.
  21 + (NSArray*)handledDragTypes;
  22
  23 // Initialize the given view, which must implement the |URLDropTarget| (below),
  24 // to accept drops of URLs.
  25 - (id)initWithView:(NSView<URLDropTarget>*)view;
  26
  27 // The owner view should implement the following methods by calling the
  28 // |URLDropTargetHandler|'s version, and leave the others to the default
  29 // implementation provided by |NSView|/|NSWindow|.
  30 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender;
  31 - (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender;
  32 - (void)draggingExited:(id<NSDraggingInfo>)sender;
  33 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender;
  34
  35 @end  // @interface URLDropTargetHandler
  36
  37 // Protocol which views that are URL drop targets and use |URLDropTargetHandler|
  38 // must implement.
  39 @protocol URLDropTarget
  40
  41 // Returns the controller which handles the drop.
  42 - (id<URLDropTargetController>)urlDropController;
  43
  44 // The following, which come from |NSDraggingDestination|, must be implemented
  45 // by calling the |URLDropTargetHandler|'s implementations.
  46 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender;
  47 - (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender;
  48 - (void)draggingExited:(id<NSDraggingInfo>)sender;
  49 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender;
  50
  51 @end  // @protocol URLDropTarget
  52
  53 // Protocol for the controller which handles the actual drop data/drop updates.
  54 @protocol URLDropTargetController
  55
  56 // Determines whether the given drag and drop operation contains content that
  57 // is supported by the web view. In particular, if the content is a local file
  58 // URL, this checks if it is of a type that can be shown in the tab contents.
  59 - (BOOL)isUnsupportedDropData:(id<NSDraggingInfo>)info;
  60
  61 // The given URLs (an |NSArray| of |NSString|s) were dropped in the given view
  62 // at the given point (in that view's coordinates).
  63 - (void)dropURLs:(NSArray*)urls inView:(NSView*)view at:(NSPoint)point;
  64
  65 // The given text was dropped in the given view at the given point (in that
  66 // view's coordinates).
  67 - (void)dropText:(NSString*)text inView:(NSView*)view at:(NSPoint)point;
  68
  69 // Dragging is in progress over the owner view (at the given point, in view
  70 // coordinates) and any indicator of location -- e.g., an arrow -- should be
  71 // updated/shown.
  72 - (void)indicateDropURLsInView:(NSView*)view at:(NSPoint)point;
  73
  74 // Dragging is over, and any indicator should be hidden.
  75 - (void)hideDropURLsIndicatorInView:(NSView*)view;
  76
  77 @end  // @protocol URLDropTargetController
  78
  79 #endif  // CHROME_BROWSER_UI_COCOA_URL_DROP_TARGET_H_