/*

     File: Controller.m

 Abstract: Main controller for the application.

  Version: 1.2

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 redistribute this Apple software.

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 Neither the name, trademarks, service marks or logos of Apple Inc. may

 be used to endorse or promote products derived from the Apple Software

 without specific prior written permission from Apple.  Except as

 expressly stated in this notice, no other rights or licenses, express or

 implied, are granted by Apple herein, including but not limited to any

 patent rights that may be infringed by your derivative works or by other

 works in which the Apple Software may be incorporated.

 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

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 Copyright (C) 2012 Apple Inc. All Rights Reserved.

 */

#import "Controller.h"

#import "TextViewAspect.h"

#import "VerticalScrollAspect.h"

#import "NoWrapScrollAspect.h"

#import "FixedSizeAspect.h"

#import "TwoColumnsAspect.h"

#import "FieldAspect.h"

@interface Controller ()

- (void)setUpTextStorage;

- (void)setUpAspects;

@end

@implementation Controller

@synthesize textStorage, aspects, selectedAspectIndex;

- (id)init {

    self = [super init];

    if (self) {

        [self setUpTextStorage];

        [self setUpAspects];

        self.selectedAspectIndex = 0;

    }

    return self;

}

/* Sets up an instance of NSTextStorage with the data in README.rtf. This will be the backing of most of the different text views we create.

 */

- (void)setUpTextStorage {

    NSError *error;

    textStorage = [[NSTextStorage alloc] initWithURL:[[NSBundle mainBundle] URLForResource:@"README" withExtension:@"rtf"] options:nil documentAttributes:NULL error:&error];

    if (!textStorage) {

        [NSApp presentError:error];

        [NSApp terminate:self];

    }

}

/* Creates all of the controllers for displaying the various aspects of the Cocoa text system. This method assumes that self.textStorage has already been initialized.

 */

- (void)setUpAspects {

    TextViewAspect *nextAspect;

    NSMutableArray *newAspects = [[NSMutableArray alloc] init];

    nextAspect = [[VerticalScrollAspect alloc] initWithTextStorage:self.textStorage];

    [newAspects addObject:nextAspect];

    [nextAspect release];

    nextAspect = [[NoWrapScrollAspect alloc] initWithTextStorage:self.textStorage];

    [newAspects addObject:nextAspect];

    [nextAspect release];

    nextAspect = [[FixedSizeAspect alloc] initWithTextStorage:self.textStorage];

    [newAspects addObject:nextAspect];

    [nextAspect release];

    nextAspect = [[TwoColumnsAspect alloc] initWithTextStorage:self.textStorage];

    [newAspects addObject:nextAspect];

    [nextAspect release];

    nextAspect = [[FieldAspect alloc] initWithTextStorage:nil]; // ignored anyway for the fields

    [newAspects addObject:nextAspect];

    [nextAspect release];

    aspects = newAspects;

}

- (void)dealloc {

    [aspects release];

    [textStorage release];

    [super dealloc];

}

/* Called when the nib file has finished loading and any documents have been opened. We use this to set up the tabless tab view with our various aspect controllers.

 */

- (void)applicationDidFinishLaunching:(NSNotification *)note {

    NSTabViewItem *nextTab;

    for (TextViewAspect *aspect in self.aspects) {

        nextTab = [[NSTabViewItem alloc] initWithIdentifier:aspect.title];

        [nextTab setView:aspect.containerView];

        [nextTab setInitialFirstResponder:aspect.textView];

        [aspectsTabView addTabViewItem:nextTab];

        [nextTab release];

    }

    [aspectsTabView removeTabViewItem:[aspectsTabView tabViewItemAtIndex:0]];

    self.selectedAspectIndex = 0;

}

#pragma mark -

/* Put up an open sheet to replace the data in the view.

 */

- (IBAction)openDocument:(id)sender {

    NSOpenPanel *openPanel = [NSOpenPanel openPanel];

    [openPanel setTreatsFilePackagesAsDirectories:NO];

    [openPanel setAllowsMultipleSelection:NO];

    [openPanel setCanChooseDirectories:NO];

    [openPanel setCanChooseFiles:YES];

    [openPanel beginSheetModalForWindow:[aspectsTabView window] completionHandler:^(NSInteger result) {

        if (result == NSOKButton) {

            [openPanel orderOut:self]; // close panel before we might present an error

            NSURL *url = [openPanel URL];

            NSString *path;

            if ([url isFileURL] && (path = [url path])) {

                [self application:NSApp openFile:[url path]];

            } else {

                NSBeep();

            }

        }

    }];

}

/* An NSApplication delegate method, also called from openPanelDidEnd:returnCode:contextInfo:. If the file's UTI is one that NSAttributedString can handle, we load it as an attributed string. Otherwise we treat the file as plain text and load it using NSString.

 */

- (BOOL)application:(NSApplication *)app openFile:(NSString *)filename {

    NSURL *fileURL = [NSURL fileURLWithPath:filename]; // make it easier to migrate to a future application:openURL:

    NSString *fileUTI = nil;

    BOOL isRichText = NO;

    // Get the UTI

    // We ignore the error because we'll just fall back to plain text otherwise

    [fileURL getResourceValue:&fileUTI forKey:NSURLTypeIdentifierKey error:NULL];

    // Figure out if the type of the file is a rich text type

    if (fileUTI) {

        NSWorkspace *workspace = [NSWorkspace sharedWorkspace];

        for (NSString *nextRichUTI in [NSAttributedString textTypes]) {

            // attributed strings can handle plain text, but we'd just as soon handle that separately

            if (![nextRichUTI isEqual:(NSString *)kUTTypePlainText]) {

                if ([workspace type:fileUTI conformsToType:nextRichUTI]) {

                    isRichText = YES;

                    break;

                }

            }

        }

    }

    if (isRichText) {

        // Load the file's data into an attributed string, then into the text storage.

        NSError *error;

        NSAttributedString *newContents = [[NSAttributedString alloc] initWithURL:fileURL options:nil documentAttributes:NULL error:&error];

        if (newContents) { 

            [textStorage setAttributedString:newContents];

            [newContents release];

        } else {

            [app presentError:error];

            return NO; 

        }

    } else {

        // Load the file's data into a regular string, then into the text storage.

        NSError *error;

        NSString *newContents = [[NSString alloc] initWithContentsOfURL:fileURL usedEncoding:NULL error:&error];

        if (newContents) {

            [[textStorage mutableString] setString:newContents];

            [textStorage addAttribute:NSFontAttributeName value:[NSFont userFixedPitchFontOfSize:0.0] range:NSMakeRange(0, [newContents length])];

            [newContents release];

        } else {

            [app presentError:error];

            return NO; 

        }

    }

    return YES;

}

@end