VuoAppAboutBox.m

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#import "VuoAppAboutBox.h"
 
#import <libgen.h>
#import <dirent.h>
 
#import "VuoAppSplashView.h"
 
@interface NSColor (VuoAppAboutBox)
@end
 
@implementation NSColor (VuoAppAboutBox)
- (NSString *)cssString
{
    NSColor *srgbColor = [self colorUsingColorSpace:NSColorSpace.sRGBColorSpace];
    return [NSString stringWithFormat:@"rgba(%g,%g,%g,%g)",
                                      255 * srgbColor.redComponent,
                                      255 * srgbColor.greenComponent,
                                      255 * srgbColor.blueComponent,
                                            srgbColor.alphaComponent];
}
@end
 
@interface VuoAppAboutTextView : NSTextView
@property (retain, nonatomic) NSString *mostRecentText;  
@end
 
@implementation VuoAppAboutTextView
 
- (instancetype)init
{
    if (self = [super init])
    {
        self.linkTextAttributes = @{ NSForegroundColorAttributeName:NSColor.secondaryLabelColor };
        self.editable = NO;
    }
    return self;
}
 
- (NSSize)intrinsicContentSize
{
    [self.layoutManager ensureLayoutForTextContainer:self.textContainer];
    return [self.layoutManager usedRectForTextContainer:self.textContainer].size;
}
 
- (void)didChangeText
{
    [super didChangeText];
    [self invalidateIntrinsicContentSize];
}
 
- (void)viewDidChangeEffectiveAppearance
{
    [self setText:self.mostRecentText];
}
 
- (void)setText:(NSString *)text
{
    self.mostRecentText = text;
    NSMutableString *s = [NSMutableString new];
    [s appendString:@"<meta http-equiv='Content-Type' content='text/html; charset=utf-8'>"];
 
    NSString *headingCSS    = NSColor.labelColor.cssString;
    NSString *subheadingCSS = NSColor.tertiaryLabelColor.cssString;
    NSString *bodyCSS       = NSColor.secondaryLabelColor.cssString;
 
    [s appendFormat:@"<style> \
                        body { font: 10pt 'Helvetica Neue'; color: %@; } \
                        p { padding-top: 30px; } \
                        h1 { padding-top: 30px; } \
                        .name { font-size: 28pt; font-weight: 300; } \
                        .version { color: %@; font-size: 22pt; font-weight: 200; } \
                        .copyright { color: %@; } \
                        .description { font-weight: bold; } \
                        .licenses { color: %@; font-size: 8pt; } \
                        pre { font: 'Monaco'; } \
                      </style>",
                    headingCSS,
                    subheadingCSS,
                    subheadingCSS,
                    bodyCSS];
    [s appendString:text];
    NSAttributedString *as = [[NSAttributedString alloc] initWithHTML:[s dataUsingEncoding:NSUTF8StringEncoding] documentAttributes:nil];
    [s release];
    self.textStorage.mutableString.string = @"";
    [self.textStorage appendAttributedString:as];
    [as release];
}
 
@end
 
 
@interface VuoAppAboutContentView : NSView
@end
 
@implementation VuoAppAboutContentView
- (void)cancelOperation:(id)sender
{
    [self.window close];
}
@end
 
 
@interface VuoAppAboutWindow : NSWindow
@end
 
@implementation VuoAppAboutWindow
 
- (instancetype)init
{
    if (self = [super initWithContentRect:NSMakeRect(0, 0, 820, 500)
                                styleMask:NSWindowStyleMaskTitled|NSWindowStyleMaskClosable|NSWindowStyleMaskFullSizeContentView
                                  backing:NSBackingStoreBuffered
                                    defer:NO])
    {
        self.releasedWhenClosed = NO;
        self.titlebarAppearsTransparent = YES;
 
 
        NSBox *leftColumn = [NSBox new];
        leftColumn.translatesAutoresizingMaskIntoConstraints = NO;
        leftColumn.boxType = NSBoxCustom;
        leftColumn.borderWidth = 0;
        leftColumn.fillColor = NSColor.controlBackgroundColor;
 
        // Contents of left column.
        {
            NSImageView *icon = [NSImageView new];
            icon.translatesAutoresizingMaskIntoConstraints = NO;
            icon.image = NSApplication.sharedApplication.applicationIconImage;
            [leftColumn addSubview:icon];
 
            VuoAppSplashView *poweredByVuo = [VuoAppSplashView new];
            poweredByVuo.translatesAutoresizingMaskIntoConstraints = NO;
            poweredByVuo.borderVisible = NO;
            [leftColumn addSubview:poweredByVuo];
 
            NSDictionary *views = NSDictionaryOfVariableBindings(icon, poweredByVuo);
            [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[icon(160)]-|" options:0 metrics:nil views:views]];
            [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[poweredByVuo]-|" options:0 metrics:nil views:views]];
            [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[icon(160)]-(>=0)-[poweredByVuo(120)]-|" options:0 metrics:nil views:views]];
 
            [poweredByVuo release];
            [icon release];
        }
 
 
        NSBox *rightColumn = [NSBox new];
        rightColumn.translatesAutoresizingMaskIntoConstraints = NO;
        rightColumn.boxType = NSBoxCustom;
        rightColumn.borderWidth = 0;
        rightColumn.fillColor = NSColor.windowBackgroundColor;
 
        // Contents of right column.
        {
            // Description.
            VuoAppAboutTextView *description = [VuoAppAboutTextView new];
            description.frame = NSMakeRect(0, 0, 560, 0);
            description.translatesAutoresizingMaskIntoConstraints = NO;
            description.drawsBackground = NO;
            {
                NSMutableString *s = [NSMutableString new];
 
                NSString *name = NSBundle.mainBundle.infoDictionary[@"CFBundleName"];
                if (!name)
                    name = NSProcessInfo.processInfo.processName;
                [s appendFormat:@"<span class='name'>%@</span>", name];
 
                NSString *version = NSBundle.mainBundle.infoDictionary[@"CFBundleShortVersionString"];
                if (version.length)
                    [s appendFormat:@" <span class='version'>%@</span>", version];
 
                NSString *copyright = NSBundle.mainBundle.infoDictionary[@"NSHumanReadableCopyright"];
                if (copyright)
                    [s appendFormat:@"<p class='copyright'>%@</p>", copyright];
 
                NSString *desc = NSBundle.mainBundle.infoDictionary[@"description"];
                if (desc)
                    [s appendFormat:@"<div class='description'>%@</div><br>", desc];
 
                NSString *homepage = NSBundle.mainBundle.infoDictionary[@"homepageURL"];
                NSString *documentation = NSBundle.mainBundle.infoDictionary[@"documentationURL"];
                if (homepage)
                    [s appendFormat:@"<p><a href='%@'>%@</a></p>", homepage, homepage];
                if (documentation)
                    [s appendFormat:@"<p><a href='%@'>%@</a></p>", documentation, documentation];
 
                [description setText:s];
                [s release];
            }
            [rightColumn addSubview:description];
 
 
            // Licenses.
            VuoAppAboutTextView *licenses = [VuoAppAboutTextView new];
            {
                NSMutableString *s = [NSMutableString new];
                [s appendString:@"<div class='licenses'>"];
                [s appendString:[self licenseString]];
                [s appendString:@"</div>"];
                [licenses setText:s];
                [s release];
            }
            NSScrollView *licensesScroller = [[NSScrollView alloc] initWithFrame:NSMakeRect(20, 20, 560, 280)];
            licensesScroller.hasVerticalScroller = YES;
            licensesScroller.documentView = licenses;
            licenses.frame = NSMakeRect(0, 0, licensesScroller.contentSize.width, licensesScroller.contentSize.height);
            [rightColumn addSubview:licensesScroller];
 
 
            NSDictionary *views = NSDictionaryOfVariableBindings(description, licensesScroller);
            [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[description]-|" options:0 metrics:nil views:views]];
            [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[licensesScroller]-|" options:0 metrics:nil views:views]];
            [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[description][licensesScroller]-|" options:0 metrics:nil views:views]];
 
            [licenses release];
            [licensesScroller release];
            [description release];
        }
 
 
        VuoAppAboutContentView *c = [VuoAppAboutContentView new];
        self.contentView = c;
        [c addSubview:leftColumn];
        [c addSubview:rightColumn];
 
        NSDictionary *views = NSDictionaryOfVariableBindings(leftColumn,rightColumn);
        [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[leftColumn][rightColumn]|" options:0 metrics:nil views:views]];
        [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[leftColumn]|" options:0 metrics:nil views:views]];
        [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[rightColumn]|" options:0 metrics:nil views:views]];
 
        [c release];
        [leftColumn release];
        [rightColumn release];
    }
 
    return self;
}
 
- (NSString *)licenseString
{
    NSMutableString *s = [NSMutableString new];
 
 
    [s appendString:@"<p>This app may include software and resources licensed under the following terms:</p>"];
 
 
    // Derive the path of "Licenses" directory.
    char licensesPath[PATH_MAX+1];
    licensesPath[0] = 0;
    const char *frameworkPath = VuoGetFrameworkOrRunnerFrameworkPath();
    if (frameworkPath)
    {
        strncpy(licensesPath, frameworkPath, PATH_MAX);
        strncat(licensesPath, "/Versions/" VUO_FRAMEWORK_VERSION_STRING "/Documentation/Licenses", PATH_MAX);
    }
 
 
    bool foundLicenses = false;
    DIR *dirp = licensesPath[0] ? opendir(licensesPath) : NULL;
    if (dirp)
    {
        struct dirent *dp;
        while ((dp = readdir(dirp)) != NULL)
        {
            if (dp->d_name[0] == '.')
                continue;
 
            char *nameWithoutExtension = strdup(dp->d_name);
            nameWithoutExtension[strlen(nameWithoutExtension) - 4] = 0;
            [s appendString:[NSString stringWithFormat:@"<h2>%s</h2>", nameWithoutExtension]];
            free(nameWithoutExtension);
 
            size_t pathSize = strlen(licensesPath) + dp->d_namlen + 2;
            char licensePath[pathSize];
            strlcpy(licensePath, licensesPath, pathSize);
            strlcat(licensePath, "/", pathSize);
            strlcat(licensePath, dp->d_name, pathSize);
 
            [s appendString:[NSString stringWithFormat:@"<pre>%@</pre><br>",
                [NSString stringWithContentsOfFile:[NSString stringWithUTF8String:licensePath] usedEncoding:nil error:nil]]];
 
            foundLicenses = true;
        }
        closedir(dirp);
    }
 
    if (!foundLicenses)
        [s appendString:@"<p>(No license information found.)</p>"];
 
    return [s autorelease];
}
 
@end
 
@interface VuoAppAboutBox ()
@property(nonatomic, strong) NSWindow *window; 
@end
 
@implementation VuoAppAboutBox
 
- (void)displayAboutPanel:(id)sender
{
    if (!_window)
        _window = [VuoAppAboutWindow new];
    [_window center];
    [_window makeKeyAndOrderFront:sender];
}
 
@end