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Murky / Source / ProjectsController.m

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//
//  ProjectsController.m
//  Murky
//
//  Copyright 2008-2009 Jens Alfke. All rights reserved.
//

#import "ProjectsController.h"
#import "MercurialApp.h"
#import "HgProject.h"
#import "HgRepository.h"
#import "MYWindowUtils.h"
#import "ExceptionUtils.h"


@implementation ProjectsController


#define kProjectsPboardType @"MurkySerializedHgProjects"


static NSArray *kDropTypes;


+ (void) initialize
{
    if( ! kDropTypes )
        kDropTypes = $array(kProjectsPboardType, NSFilenamesPboardType, NSURLPboardType);
}


+ (ProjectsController*) sharedInstance
{
    static ProjectsController *sController;
    if( ! sController )
        sController = [[ProjectsController alloc] init];
    return sController;
}


+ (NSString*) saveFile
{
    return [NSHomeDirectory() stringByAppendingPathComponent: @"Library/Preferences/Murky Projects"];
}


- (id) init
{
    self = [super initWithWindowNibName: @"Projects"];
    if( self ) {
        _root = [NSKeyedUnarchiver unarchiveObjectWithFile: [[self class] saveFile]];
        if( _root ) {
            _exists = YES;
        } else {
            _root = [HgProject projectWithName: @"Projects"];   // not itself visible
            [_root addChild: [HgProject projectWithName: NSLocalizedString(@"untitled project", 
                                                                           @"Default name of new project (group) created in Projects window")]];
        }
                
        [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(save)
                                                     name: NSApplicationWillTerminateNotification
                                                   object: NSApp];
    }
    return self;
}


// The tree controller is bound to this.
- (HgProject*) projects
{
    return _root;
}

- (void) save
{
    if (_changed) {
        NSError *error;
        [[NSKeyedArchiver archivedDataWithRootObject: _root] writeToFile: [[self class] saveFile]
                                                                 options: NSAtomicWrite
                                                                   error: &error];
        Log(@"Saved project tree");
        _changed = NO;
    }
}

- (void) changed {
    if (!_changed) {
        _changed = YES;
        [self performSelector: @selector(save) withObject: nil afterDelay: 5.0];
        _exists = YES;
        [_introMessage setHidden: YES];
    }
}


- (NSArray*) selection {
    NSMutableArray *sel = $marray();
    NSIndexSet *indexes = _outline.selectedRowIndexes;
    for (NSInteger row=indexes.firstIndex; row!=NSNotFound; row=[indexes indexGreaterThanIndex: row])
        [sel addObject: [[_outline itemAtRow: row] representedObject]];
    return sel;
}


#pragma mark -
#pragma mark UI:


- (void) windowDidLoad
{
    _outline.doubleAction = @selector(openRepository:);
    [_outline registerForDraggedTypes: kDropTypes];
    if (!_exists)
        [_introMessage setHidden: NO];
    [self.window my_setTitleBarIcon: [NSImage imageNamed: @"mercurial-logo-official.icns"]];
    [self.window setExcludedFromWindowsMenu: YES];
}


+ (void) applicationLaunched
{
    if( ! [[NSUserDefaults standardUserDefaults] boolForKey: @"ProjectsHidden"] )
        [[self sharedInstance] showWindow: self];
}

- (void)windowWillClose:(NSNotification *)notification
{
    [[NSUserDefaults standardUserDefaults] setBool: YES forKey: @"ProjectsHidden"];
}

- (void)windowDidBecomeKey:(NSNotification *)notification
{
    [[NSUserDefaults standardUserDefaults] setBool: NO forKey: @"ProjectsHidden"];
}


- (id)outlineView:(NSOutlineView *)outlineView itemForPersistentObject:(id)object {
    NSIndexPath *path = [NSKeyedUnarchiver unarchiveObjectWithData: object];
    return [_tree.arrangedObjects descendantNodeAtIndexPath: path];
    
}

- (id)outlineView:(NSOutlineView *)outlineView persistentObjectForItem:(id)item {
    NSIndexPath *path = [(NSTreeNode*)item indexPath];
    return [NSKeyedArchiver archivedDataWithRootObject: path];
}


- (void)outlineView:(NSOutlineView *)outlineView
    willDisplayCell:(id)cell
     forTableColumn:(NSTableColumn *)tableColumn 
               item:(id)item
{
    if( [tableColumn.identifier isEqualToString: @"name"] ) {
        // Set the icon to show along with the name:
        NSTreeNode *node = item;
        HgProject *project = node.representedObject;
        NSImage *icon = project.icon;
        NSURL *url = project.repositoryURL;
        if( !url.isFileURL )
            icon = [[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kOpenFolderIcon)];
        [cell setIcon: icon];
        
        //FIXME: we have to set the font here but not for the outliner of the repo browser... why is that?
        [cell setFont:[NSFont systemFontOfSize:11.0f]];
    }
}


- (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item
{
    return ! [item isLeaf];
}


- (NSString *)outlineView:(NSOutlineView *)outlineView 
           toolTipForCell:(NSCell *)cell
                     rect:(NSRectPointer)rect
              tableColumn:(NSTableColumn *)tableColumn
                     item:(id)item 
            mouseLocation:(NSPoint)mouseLocation;
{
    NSTreeNode *node = item;
    HgProject *project = node.representedObject;
    NSURL *url = project.repositoryURL;
    if( url.isFileURL )
        return url.path;
    else
        return url.absoluteString;
}


- (BOOL)outlineView:(NSOutlineView *)outlineView shouldEditTableColumn:(NSTableColumn *)tableColumn item:(id)item
{
    // Double click should not begin editing title of a leaf.
    HgProject *project = [item representedObject];
    return tableColumn.isEditable && (!project.isLeaf || [[NSApp currentEvent] clickCount]<2);
}


#pragma mark -
#pragma mark DRAGGING:


static NSMutableArray *sDraggingProjects;


- (int) _typeOfDrag: (id<NSDraggingInfo>)info
{
    NSString *type = [[info draggingPasteboard] availableTypeFromArray: kDropTypes];
    if( type )
        return [kDropTypes indexOfObject: type];
    else
        return NSNotFound;
}

- (NSArray*) _projectsFromDrag: (id <NSDraggingInfo>)info
{
    NSPasteboard *pb = [info draggingPasteboard];
    switch( [self _typeOfDrag: info] ) {
        case 0: {
            return sDraggingProjects;
        }
        case 1: {
            NSMutableArray *projects = [NSMutableArray array];
            for( NSString *path in [pb propertyListForType: NSFilenamesPboardType] ) {
                NSURL *url = [NSURL fileURLWithPath: path];
                HgProject *project = [HgProject projectWithRepositoryURL: url];
                if (project)
                    [projects addObject: project];
            }
            if (projects.count==0)
                projects = nil;
            return projects;
        }
        case 2: {
            NSURL *url = [NSURL URLFromPasteboard: pb];
            HgProject *project = [HgProject projectWithRepositoryURL: url];
            return project ?[NSArray arrayWithObject: project] :nil;
        }
        default:
            return nil;
    }
}


- (NSDragOperation)outlineView:(NSOutlineView *)outlineView validateDrop:(id <NSDraggingInfo>)info proposedItem:(id)item proposedChildIndex:(NSInteger)index
{
    @try{
        NSArray *draggedProjects = [self _projectsFromDrag: info];
        if (draggedProjects == nil )
            return NSDragOperationNone;
        
        HgProject *project = item ?[item representedObject] :_root;
        //Log(@"Drag: index=%i, item=%@, project=%@", index,item,project);//TEMP
        if (index==NSOutlineViewDropOnItemIndex) {
            if (project==_root) {
                // Drag to empty space in window appends to root:
                index = project.children.count;
            } else if (project.isLeaf) {
                // Drag onto a leaf item turns into drag above it:
                item = [item parentNode];
                NSArray *siblings = [[item representedObject] valueForKey: @"children"];
                if (siblings) {
                    index = [siblings indexOfObjectIdenticalTo: project];
                    if (index==NSNotFound) {
                        Warn(@"Couldn't find %@ in parent %@",project,item);
                        index = 0;
                    }
                }
                if (![item parentNode])
                    item = nil;
            }
            //Log(@"  now index=%i, item=%@", index,item);//TEMP
            [outlineView setDropItem: item dropChildIndex: index];
        }
        
        // Prevent dragging into a folder that's being dragged:
        if (draggedProjects == sDraggingProjects) {
            for (HgProject *draggedProject in draggedProjects) {
                if ([draggedProject containsProject: project])
                    return NSDragOperationNone;
            }
        }
        
        return NSDragOperationLink;
    }catchAndReport(@"Exception handling drag");
    return NSDragOperationNone;
}


- (BOOL)outlineView:(NSOutlineView *)outlineView 
         acceptDrop:(id <NSDraggingInfo>)info 
               item:(id)item 
         childIndex:(NSInteger)index
{
    NSArray *projects = [self _projectsFromDrag: info];
    Log(@"acceptDrop: %@", projects);
    if( projects ) {
        HgProject *dstParent = item ?[item representedObject] :_root;
        if (index==NSOutlineViewDropOnItemIndex) index=0;
        
        for( HgProject *child in projects ) {
            Log(@"    add %@ to %@ at %i", child,dstParent,index);
            if ([dstParent.children indexOfObjectIdenticalTo: child] < (unsigned)index)
                index--;
            [_root removeDescendent: child];
            if( [dstParent addChild: child atIndex: index] )
                index++;
        }
        [self changed];
        return YES;
    }
    return NO;
}


- (BOOL)outlineView:(NSOutlineView *)outlineView 
         writeItems:(NSArray *)items 
       toPasteboard:(NSPasteboard *)pasteboard;
{
    sDraggingProjects = $marray();
    for (id item in items)
        [sDraggingProjects addObject: [item representedObject]];
    Log(@"Dragging %@ ...", sDraggingProjects);
    
    [pasteboard declareTypes: $array(kProjectsPboardType) owner: self];
    return YES;
}

- (void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSString *)type
{
    Log(@"provideDataForType");
    [sender setData: [NSData data] forType: type];
}

- (void)pasteboardChangedOwner:(NSPasteboard *)sender
{
    Log(@"pasteboardChangedOwner");
    sDraggingProjects = nil;
}




#pragma mark -
#pragma mark ACTIONS:


- (HgProject*) selectedProject
{
    // During a right-click, use the clicked row if it's not selected:
    int row = _outline.clickedRow;
    if( row >= 0 && ! [_outline isRowSelected: row] )
        return [[_outline itemAtRow: row] representedObject];
    else {
        NSArray *objs = _tree.selectedObjects;
        if( objs.count==1 )
            return [objs objectAtIndex: 0];
        else
            return nil;
    }
}

- (IBAction) addRemoveProject: (id)sender
{
    if( [[sender cell] tagForSegment:[sender selectedSegment]] == 1 ) {
        [self removeProject: sender];
    }
    else {
        [self addProject: sender];
    }
}

- (IBAction) addProject: (id)sender
{
    [_root addChild: [HgProject projectWithName: NSLocalizedString(@"untitled project", 
                                                                   @"Default name of new project (group) created in Projects window")]];
    [self changed];
}


- (IBAction) removeProject: (id)sender
{
    [_tree remove: sender];
    [self changed];
}

- (IBAction) delete: (id)sender
{
    [self removeProject: self];
}


- (IBAction) openRepository: (id)sender
{
    NSURL *url = self.selectedProject.repositoryURL;
    if( url.isFileURL )
        [gMercurialApp openRepository: url.path remember: YES];
    else {
        url = self.selectedProject.browseURL;
        if( !url || ! [[NSWorkspace sharedWorkspace] openURL: url] )
            NSBeep();
    }
}


- (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)item
{
    return [_tree validateUserInterfaceItem: item];
}


- (void) keyDown: (NSEvent*)ev {
    NSString *chars = [ev charactersIgnoringModifiers];
    if ( [chars length] == 1 ) {
        unichar ch = [chars characterAtIndex:0];
        switch (ch) {
            case 0x7F:
            case NSDeleteFunctionKey:
                [self removeProject: self];
                break;
        }
    }
}


@end