electron/atom/browser/ui/cocoa/NSString+ANSI.mm

// Created by Kent Karlsson on 3/11/16.
// Copyright (c) 2016 Bit Bar. All rights reserved.
// Copyright (c) 2017 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "atom/browser/ui/cocoa/NSString+ANSI.h"
#include "atom/browser/ui/cocoa/NSColor+Hex.h"
#include "base/mac/scoped_nsobject.h"

@implementation NSMutableDictionary (ANSI)

- (NSMutableDictionary*)modifyAttributesForANSICodes:(NSString*)codes {
  BOOL bold = NO;
  NSFont* font = self[NSFontAttributeName];

  NSArray* codeArray = [codes componentsSeparatedByString:@";"];

  for (NSString* codeString in codeArray) {
    int code = codeString.intValue;
    switch (code) {
      case 0:
        [self removeAllObjects];
        // remove italic and bold from font here
        if (font) self[NSFontAttributeName] = font;
        break;

      case 1:
      case 22:
        bold = (code == 1);
        break;

    // case 3: italic
    // case 23: italic off
    // case 4: underlined
    // case 24: underlined off

      case 30:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"7f7f7f" : @"000000"];
        break;
      case 31:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"cd0000" : @"ff0000"];
        break;
      case 32:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"00cd00" : @"00ff00"];
        break;
      case 33:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"cdcd00" : @"ffff00"];
        break;
      case 34:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"0000ee" : @"5c5cff"];
        break;
      case 35:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"cd00cd" : @"ff00ff"];
        break;
      case 36:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"00cdcd" : @"00ffff"];
        break;
      case 37:
        self[NSForegroundColorAttributeName] = [NSColor colorWithHexColorString:bold ? @"e5e5e5" : @"ffffff"];
        break;

      case 39:
        [self removeObjectForKey:NSForegroundColorAttributeName];
        break;

      case 40:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"7f7f7f"];
        break;
      case 41:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"cd0000"];
        break;
      case 42:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"00cd00"];
        break;
      case 43:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"cdcd00"];
        break;
      case 44:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"0000ee"];
        break;
      case 45:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"cd00cd"];
        break;
      case 46:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"00cdcd"];
        break;
      case 47:
        self[NSBackgroundColorAttributeName] = [NSColor colorWithHexColorString:@"e5e5e5"];
        break;

      case 49:
        [self removeObjectForKey:NSBackgroundColorAttributeName];
        break;

      default:
        break;
    }
  }

  return self;
}

@end

@implementation NSString (ANSI)

- (BOOL)containsANSICodes {
  return [self rangeOfString:@"\033["].location != NSNotFound;
}

- (NSMutableAttributedString*)attributedStringParsingANSICodes {
  NSMutableAttributedString* result = [[NSMutableAttributedString alloc] init];

  base::scoped_nsobject<NSMutableDictionary> attributes(
      [[NSMutableDictionary alloc] init]);
  NSArray* parts = [self componentsSeparatedByString:@"\033["];
  [result appendAttributedString:[[[NSAttributedString alloc]
                                     initWithString:parts.firstObject
                                         attributes:nil] autorelease]];

  for (NSString* part in [parts subarrayWithRange:NSMakeRange(1, parts.count - 1)]) {
    if (part.length == 0)
      continue;

    NSArray* sequence = [part componentsSeparatedByString:@"m"];
    NSString* text = sequence.lastObject;

    if (sequence.count < 2) {
      [result appendAttributedString:[[[NSAttributedString alloc]
                                         initWithString:text
                                             attributes:attributes] autorelease]];
    } else if (sequence.count >= 2) {
      text = [[sequence subarrayWithRange:NSMakeRange(1, sequence.count - 1)]
                 componentsJoinedByString:@"m"];
      [attributes modifyAttributesForANSICodes:sequence[0]];
      [result appendAttributedString:[[[NSAttributedString alloc]
                                         initWithString:text
                                             attributes:attributes] autorelease]];
    }
  }

  return result;
}

@end