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// 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.
#import "chrome/browser/ui/cocoa/url_drop_target.h"
#include "base/basictypes.h"
#include "chrome/browser/ui/cocoa/drag_util.h"
#include "googleurl/src/gurl.h"
#import "third_party/mozilla/NSPasteboard+Utils.h"
namespace {
// Mac WebKit uses this type, declared in
// WebKit/mac/History/WebURLsWithTitles.h.
NSString* const kCrWebURLsWithTitlesPboardType =
@"WebURLsWithTitlesPboardType";
} // namespace
@interface URLDropTargetHandler(Private)
// Gets the appropriate drag operation given the |NSDraggingInfo|.
- (NSDragOperation)getDragOperation:(id<NSDraggingInfo>)sender;
// Tell the window controller to hide the drop indicator.
- (void)hideIndicator;
@end // @interface URLDropTargetHandler(Private)
@implementation URLDropTargetHandler
+ (NSArray*)handledDragTypes {
return [NSArray arrayWithObjects:kCrWebURLsWithTitlesPboardType,
NSURLPboardType,
NSStringPboardType,
NSFilenamesPboardType,
nil];
}
- (id)initWithView:(NSView<URLDropTarget>*)view {
if ((self = [super init])) {
view_ = view;
[view_ registerForDraggedTypes:[URLDropTargetHandler handledDragTypes]];
}
return self;
}
// The following four methods implement parts of the |NSDraggingDestination|
// protocol, which the owner should "forward" to its |URLDropTargetHandler|
// (us).
- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
if ([[view_ urlDropController] isUnsupportedDropData:sender])
return NSDragOperationNone;
return [self getDragOperation:sender];
}
- (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender {
NSDragOperation dragOp = NSDragOperationNone;
BOOL showIndicator = NO;
// Show indicator for drag data supported for tab contents as well as for
// local file drags that may not be viewable in tab contents, but should
// still trigger hover tab selection.
if (![[view_ urlDropController] isUnsupportedDropData:sender]) {
dragOp = [self getDragOperation:sender];
if (dragOp == NSDragOperationCopy)
showIndicator = YES;
} else if (!drag_util::GetFileURLFromDropData(sender).is_empty()) {
showIndicator = YES;
}
if (showIndicator) {
// Just tell the window controller to update the indicator.
NSPoint hoverPoint = [view_ convertPoint:[sender draggingLocation]
fromView:nil];
[[view_ urlDropController] indicateDropURLsInView:view_ at:hoverPoint];
}
return dragOp;
}
- (void)draggingExited:(id<NSDraggingInfo>)sender {
[self hideIndicator];
}
- (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {
[self hideIndicator];
NSPasteboard* pboard = [sender draggingPasteboard];
NSArray* supportedTypes = [NSArray arrayWithObjects:NSStringPboardType, nil];
NSString* bestType = [pboard availableTypeFromArray:supportedTypes];
NSPoint dropPoint =
[view_ convertPoint:[sender draggingLocation] fromView:nil];
// Tell the window controller about the dropped URL(s).
if ([pboard containsURLData]) {
NSArray* urls = nil;
NSArray* titles; // discarded
[pboard getURLs:&urls andTitles:&titles convertingFilenames:YES];
if ([urls count]) {
[[view_ urlDropController] dropURLs:urls inView:view_ at:dropPoint];
return YES;
}
} else if (NSString* text = [pboard stringForType:bestType]) {
// This does not include any URLs, so treat it as plain text if we can
// get NSString.
[[view_ urlDropController] dropText:text inView:view_ at:dropPoint];
return YES;
}
return NO;
}
@end // @implementation URLDropTargetHandler
@implementation URLDropTargetHandler(Private)
- (NSDragOperation)getDragOperation:(id<NSDraggingInfo>)sender {
NSPasteboard* pboard = [sender draggingPasteboard];
NSArray *supportedTypes = [NSArray arrayWithObjects:NSStringPboardType, nil];
NSString *bestType = [pboard availableTypeFromArray:supportedTypes];
if (![pboard containsURLData] && ![pboard stringForType:bestType])
return NSDragOperationNone;
// Only allow the copy operation.
return [sender draggingSourceOperationMask] & NSDragOperationCopy;
}
- (void)hideIndicator {
[[view_ urlDropController] hideDropURLsIndicatorInView:view_];
}
@end // @implementation URLDropTargetHandler(Private)
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