transmission/macosx/FileRenameSheetController.m

//
//  FileRenameSheetController.m
//  Transmission
//
//  Created by Mitchell Livingston on 1/20/13.
//  Copyright (c) 2013 The Transmission Project. All rights reserved.
//

#import "FileRenameSheetController.h"
#import "FileListNode.h"
#import "Torrent.h"

typedef void (^CompletionBlock)(BOOL);

@interface FileRenameSheetController ()

@property (nonatomic) Torrent * torrent;
@property (nonatomic) FileListNode * node;
@property (nonatomic, copy) CompletionBlock completionHandler;

@property (nonatomic, copy) NSString * originalName;

@end

@implementation FileRenameSheetController

+ (void) presentSheetForTorrent: (Torrent *) torrent modalForWindow: (NSWindow *) window completionHandler: (void (^)(BOOL didRename)) completionHandler
{
    NSParameterAssert(torrent != nil);
    NSParameterAssert(window != nil);

    FileRenameSheetController * renamer = [[FileRenameSheetController alloc] initWithWindowNibName: @"FileRenameSheetController"];

    renamer.torrent = torrent;
    renamer.completionHandler = completionHandler;

    [NSApp beginSheet: renamer.window modalForWindow: window modalDelegate: self didEndSelector: @selector(sheetDidEnd:returnCode:contextInfo:) contextInfo: (__bridge_retained void *)(renamer)];
}

+ (void) presentSheetForFileListNode: (FileListNode *) node modalForWindow: (NSWindow *) window completionHandler: (void (^)(BOOL didRename)) completionHandler
{
    NSParameterAssert(node != nil);
    NSParameterAssert(window != nil);

    FileRenameSheetController * renamer = [[FileRenameSheetController alloc] initWithWindowNibName: @"FileRenameSheetController"];

    renamer.torrent = node.torrent;
    renamer.node = node;
    renamer.completionHandler = completionHandler;

    [NSApp beginSheet: renamer.window modalForWindow: window modalDelegate: self didEndSelector: @selector(sheetDidEnd:returnCode:contextInfo:) contextInfo: (__bridge_retained void *)(renamer)];
}

+ (void) sheetDidEnd: (NSWindow *) sheet returnCode: (NSInteger) returnCode contextInfo: (void *) contextInfo
{
    FileRenameSheetController * renamer = (__bridge_transfer FileRenameSheetController *)(contextInfo);
    NSParameterAssert([renamer isKindOfClass:[FileRenameSheetController class]]);

    renamer.completionHandler(returnCode == NSOKButton);

    [sheet orderOut: self];
}


- (void) windowDidLoad
{
    [super windowDidLoad];

    self.originalName = self.node.name ?: self.torrent.name;
    NSString * label = [NSString stringWithFormat: NSLocalizedString(@"Rename the file \"%@\":", "rename sheet label"), self.originalName];
    self.labelField.stringValue = label;

    self.inputField.stringValue = self.originalName;
    self.renameButton.enabled = NO;

    //resize the buttons so that they're long enough and the same width
    const NSRect oldRenameFrame = self.renameButton.frame;
    const NSRect oldCancelFrame = self.cancelButton.frame;

    //get the extra width of the rename button from the English xib - the width from sizeToFit is too squished
    [self.renameButton sizeToFit];
    const CGFloat extra = NSWidth(oldRenameFrame) - NSWidth(self.renameButton.frame);

    self.renameButton.title = NSLocalizedString(@"Rename", "rename sheet button");
    self.cancelButton.title = NSLocalizedString(@"Cancel", "rename sheet button");

    [self.renameButton sizeToFit];
    [self.cancelButton sizeToFit];
    NSRect newRenameFrame = self.renameButton.frame;
    NSRect newCancelFrame = self.cancelButton.frame;
    newRenameFrame.size.width = MAX(NSWidth(newRenameFrame), NSWidth(newCancelFrame)) + extra;
    newCancelFrame.size.width = MAX(NSWidth(newRenameFrame), NSWidth(newCancelFrame)) + extra;

    const CGFloat renameWidthIncrease = NSWidth(newRenameFrame) - NSWidth(oldRenameFrame);
    newRenameFrame.origin.x -= renameWidthIncrease;
    self.renameButton.frame = newRenameFrame;

    const CGFloat cancelWidthIncrease = NSWidth(newCancelFrame) - NSWidth(oldCancelFrame);
    newCancelFrame.origin.x -= renameWidthIncrease + cancelWidthIncrease;
    self.cancelButton.frame = newCancelFrame;
}

- (IBAction) rename: (id) sender
{
    void (^completionHandler)(BOOL) = ^(BOOL didRename) {
        if (didRename)
            [NSApp endSheet: self.window returnCode: NSOKButton];
        else
        {
            #warning more thorough error
            NSBeep();
        }
    };

    if (self.node)
        [self.torrent renameFileNode: self.node withName: self.inputField.stringValue completionHandler: completionHandler];
    else
        [self.torrent renameTorrent: self.inputField.stringValue completionHandler: completionHandler];
}

- (IBAction) cancelRename: (id) sender
{
    [NSApp endSheet: self.window returnCode: NSCancelButton];
}

- (void) controlTextDidChange: (NSNotification *) notification
{
    self.renameButton.enabled = ![self.inputField.stringValue isEqualToString: @""] && ![self.inputField.stringValue isEqualToString: self.originalName];
}

@end