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/* This file is part of Owl.
*
* Copyright © 2019-2021 Sergey Bugaev <bugaevc@gmail.com>
*
* Owl is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* Owl is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with Owl. If not, see <http://www.gnu.org/licenses/>.
*/
#import "OwlPasteboardDataDevice.h"
#import "OwlPasteboardDataOffer.h"
#import "OwlPasteboardDataSource.h"
#import "OwlServer.h"
#import "OwlSelection.h"
@implementation OwlPasteboardDataDevice
// Publish a fresh data source representing our pasteboard
// as the selection content.
- (void) publishDataSource {
OwlPasteboardDataSource *dataSource = [OwlPasteboardDataSource alloc];
dataSource = [dataSource initWithPasteboard: _pasteboard];
[_selection setDataSource: dataSource];
[dataSource release];
[[OwlServer sharedServer] flushClientsLater];
}
// FIXME: This is only called by our own offers when they get cancelled,
// which means we miss refreshes when we don't own the pasteboard.
- (void) pasteboardRefreshed {
if (_ignoreRefreshes) {
return;
}
// We have to do this asynchronously, otherwise NSPasteboard gets confused over
// accessing pasteboard contents from the pasteboardChangedOwner handler, and
// sends the same notification again and again, recursively.
// The order argument below represents which order these delayed selectors should
// be executed in; lower values go first. We do not care, so pass some large number.
NSArray *modes = [NSArray arrayWithObject: NSDefaultRunLoopMode];
[[NSRunLoop currentRunLoop] performSelector: @selector(publishDataSource)
target: self
argument: nil
order: 1000
modes: modes];
}
- (id) initWithPasteboard: (NSPasteboard *) pboard
selection: (OwlSelection *) selection
{
self = [super initWithResource: NULL];
_pasteboard = [pboard retain];
_selection = [selection retain];
[selection addDataDevice: self];
// On startup, initialize selection with pasteboard contents.
// We assume no clients have connected yet.
[self pasteboardRefreshed];
return self;
}
- (void) dealloc {
[_pasteboard release];
[_selection removeDataDevice: self];
[_selection release];
[_currentOffer release];
[super dealloc];
}
- (NSPasteboard *) pasteboard {
return _pasteboard;
}
// Selection has changed; proxy the new contents to the pasteboard.
- (void) selectionChanged: (OwlSelection *) selection {
OwlDataSource *dataSource = [selection dataSource];
[_currentOffer release];
_currentOffer = nil;
if (dataSource == nil) {
[_pasteboard clearContents];
return;
}
// Don't proxy pasteboard contents back to the pasteboard.
if ([dataSource isKindOfClass: [OwlPasteboardDataSource class]]) {
return;
}
_ignoreRefreshes = YES;
_currentOffer = [OwlPasteboardDataOffer alloc];
_currentOffer = [_currentOffer initWithDataDevice: self
dataSource: dataSource];
_ignoreRefreshes = NO;
}
@end
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