The R Project SVN R-packages

/*
 *  R.app : a Cocoa front end to: "R A Computer Language for Statistical Data Analysis"
 *  
 *  R.app Copyright notes:
 *                     Copyright (C) 2004-5  The R Foundation
 *                     written by Stefano M. Iacus and Simon Urbanek
 *
 *                  
 *  R Copyright notes:
 *                     Copyright (C) 1995-1996   Robert Gentleman and Ross Ihaka
 *                     Copyright (C) 1998-2001   The R Development Core Team
 *                     Copyright (C) 2002-2004   The R Foundation
 *
 *  This program 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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.
 *
 *  A copy of the GNU General Public License is available via WWW at
 *  http://www.gnu.org/copyleft/gpl.html.  You can also obtain it by
 *  writing to the Free Software Foundation, Inc., 59 Temple Place,
 *  Suite 330, Boston, MA  02111-1307  USA.
 */

#import "PackageManager.h"
#import "RController.h"
#import <WebKit/WebKit.h>
#import <WebKit/WebFrame.h>
#import "REngine/REngine.h"
#import "RegexKitLite.h"

static PackageManager *sharedController = nil;

@implementation PackageManager

- (id)init
{
    self = [super init];
    if (self) {
        sharedController = self;
        [packageDataSource setTarget: self];
        packages = 0;
        package = 0;
    }
    
    return self;
}

+ (PackageManager*) sharedController
{
    return sharedController;
}

- (void)dealloc {
    [self resetPackages];
    [super dealloc];
}

#pragma mark -
#pragma mark TableView delegates

/* These two routines are needed to update the History TableView */
- (NSInteger)numberOfRowsInTableView: (NSTableView *)tableView
{
    return packages;
}

- (id)tableView: (NSTableView *)tableView objectValueForTableColumn: (NSTableColumn *)tableColumn row: (NSInteger)row
{
    if (row<packages) {
        if([[tableColumn identifier] isEqualToString:@"status"])
            return [NSNumber numberWithBool: package[row].status];
        else if([[tableColumn identifier] isEqualToString:@"package"])
            return package[row].name;
        else if([[tableColumn identifier] isEqualToString:@"description"])
            return package[row].desc;
    }
    return nil;
}

- (void)tableView:(NSTableView *)tableView
    setObjectValue:(id)object
    forTableColumn:(NSTableColumn *)tableColumn
    row:(NSInteger)row
{
    if (row>=packages) return;
    if([[tableColumn identifier] isEqualToString:@"status"]){
        if ([object boolValue] == NO) {
            if ([[REngine mainEngine] executeString:[NSString stringWithFormat:@"detach(\"package:%@\")",package[row].name]])
                package[row].status = NO;
        } else {
            if ([[REngine mainEngine] executeString:[NSString stringWithFormat:@"library(%@)",package[row].name]])
                package[row].status = YES;
        }
    } 
}

#pragma mark -
#pragma mark TableView notifications

- (void)tableViewSelectionDidChange:(NSNotification *)aNotification
{
    // Check our notification object is our table
    if ([aNotification object] != packageDataSource) return;

    // Update Info delayed
    [NSObject cancelPreviousPerformRequestsWithTarget:self 
                            selector:@selector(showInfo:) 
                            object:packageDataSource];

    [self performSelector:@selector(showInfo:) withObject:packageDataSource afterDelay:0.5];
    
}

#pragma mark -

- (IBAction) showInfo:(id)sender
{
    int row = [sender selectedRow];
    if (row < 0) return;
    NSString *urlText = nil;
    int port = [[RController sharedController] helpServerPort];
    if (port == 0) {
        NSRunInformationalAlertPanel(NLS(@"Cannot start HTML help server."), NLS(@"Help"), NLS(@"Ok"), nil, nil);
        return;
    }
    urlText = [NSString stringWithFormat:@"http://127.0.0.1:%d/library/%@/html/00Index.html", port, package[row].name];
    SLog(@"PackageManager.showInfo: URL=%@", urlText);
    [[PackageInfoView mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlText]]];
}

- (id) window
{
    return PackageManagerWindow;
}

- (IBAction) reloadPMData:(id)sender
{
    [[REngine mainEngine] executeString:@"package.manager()"];
    [packageDataSource reloadData];
}

- (void) resetPackages
{
    if (!packages) return;
    int i=0;
    while (i<packages) {
        [package[i].name release];
        [package[i].desc release];
        [package[i].url release];
        i++;
    }
    free(package);
    packages=0;
}

- (void) updatePackages: (int) count withNames: (char**) name descriptions: (char**) desc URLs: (char**) url status: (BOOL*) stat;
{
    int i=0;
    
    if (packages) [self resetPackages];
    if (count<1) {
        [self show];
        return;
    }
    
    package = malloc(sizeof(*package)*count);
    while (i<count) {
        package[i].name=[[NSString alloc] initWithUTF8String: name[i]];
        package[i].desc=[[NSString alloc] initWithUTF8String: desc[i]];
        package[i].url=[[NSString alloc] initWithUTF8String: url[i]];
        package[i].status=stat[i];
        i++;
    }
    packages = count;
    [self show];
}

- (int) count
{
    return packages;
}

- (void) show
{
    [packageDataSource reloadData];
    [[self window] makeKeyAndOrderFront:self];
}

- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
    [backButton setEnabled:[sender canGoBack]];
    [forwardButton setEnabled:[sender canGoForward]];
}

- (void)sheetDidEnd:(id)sheet returnCode:(int)returnCode contextInfo:(NSString *)contextInfo
{
    [PackageManagerWindow makeKeyAndOrderFront:nil];
}

- (IBAction)printDocument:(id)sender
{

    [NSObject cancelPreviousPerformRequestsWithTarget:self 
                            selector:@selector(showInfo:) 
                            object:packageDataSource];

    NSPrintInfo *printInfo;
    NSPrintOperation *printOp;
    
    printInfo = [NSPrintInfo sharedPrintInfo];
    [printInfo setHorizontalPagination: NSFitPagination];
    [printInfo setVerticalPagination: NSAutoPagination];
    [printInfo setVerticallyCentered:NO];
    
    printOp = [NSPrintOperation printOperationWithView:[[[PackageInfoView mainFrame] frameView] documentView] 
                                             printInfo:printInfo];
    [printOp setShowPanels:YES];
    [printOp runOperationModalForWindow:[self window] 
                               delegate:self 
                         didRunSelector:@selector(sheetDidEnd:returnCode:contextInfo:) 
                            contextInfo:@""];
}

- (IBAction)executeSelection:(id)sender
{
    DOMRange *dr = [PackageInfoView selectedDOMRange];
    if (dr) { /* we don't do line-exec since we don't get the text outside the selection */
        NSString *stx = [dr markupString];
        // Ok, some simple processing here - it may not work in all cases
        stx = [stx stringByReplacingOccurrencesOfRegex:@"(?i)<br[^>]*?>" withString:@"\n"];
        stx = [stx stringByReplacingOccurrencesOfRegex:@"<[^>]*?>" withString:@""];
        stx = [stx stringByReplacingOccurrencesOfString:@"&lt;" withString:@"<"];
        stx = [stx stringByReplacingOccurrencesOfString:@"&gt;" withString:@">"];
        stx = [stx stringByReplacingOccurrencesOfString:@"&amp;" withString:@"&"];
        [[RController sharedController] sendInput:stx];
    }
}

- (BOOL)validateMenuItem:(NSMenuItem *)menuItem
{
    if ([menuItem action] == @selector(executeSelection:)) {
        return ([PackageInfoView selectedDOMRange] == nil) ? NO : YES;
    }

    return YES;
}


@end