Initial data commit

Task/Increment-a-numerical-string/AppleScript/increment-a-numerical-string-3.applescript

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+use AppleScript version "2.4" -- OS X 10.10 (Yosemite) or later
+use framework "Foundation"
+
+-- Using the machine's own locale setting. The numerical text must be compatible with this.
+-- Params: Numerical text or NSString, AppleScript or Objective-C number or text equivalent.
+on incrementNumericalString:str byAmount:increment
+    set localeID to current application's class "NSLocale"'s currentLocale()'s localeIdentifier()
+    return my incrementNumericalString:str byAmount:increment localeID:localeID
+end incrementNumericalString:byAmount:
+
+-- Including the locale ID as an additional parameter.
+-- Params: As above plus locale ID (text or NSString).
+on incrementNumericalString:str byAmount:increment localeID:localeID
+    set |⌘| to current application
+    set str to |⌘|'s class "NSString"'s stringWithString:(str)
+    set locale to |⌘|'s class "NSLocale"'s localeWithLocaleIdentifier:(localeID)
+    set decSeparator to locale's objectForKey:(|⌘|'s NSLocaleDecimalSeparator)
+    set regex to |⌘|'s NSRegularExpressionSearch
+    -- Use an NSNumberFormatter to generate the NSDecimalNumber objects for the math,
+    -- as its number/string conversions are more flexible than NSDecimalNumber's own.
+    tell |⌘|'s class "NSNumberFormatter"'s new()
+        its setGeneratesDecimalNumbers:(true)
+        its setLocale:(locale)
+        set symbolRange to str's rangeOfString:("[Ee]| ?[x*] ?10 ?\\^ ?") options:(regex)
+        if (symbolRange's |length|() > 0) then
+            -- Catered-for exponent symbol in the input string. Set the output style to "scientific".
+            its setNumberStyle:(|⌘|'s NSNumberFormatterScientificStyle)
+            its setExponentSymbol:(str's substringWithRange:(symbolRange))
+        else
+            -- Straight numerical text, with or without separators as per the input and locale.
+            its setNumberStyle:(|⌘|'s NSNumberFormatterDecimalStyle)
+            set groupingSeparator to locale's objectForKey:(|⌘|'s NSLocaleGroupingSeparator)
+            its setUsesGroupingSeparator:(str's containsString:(groupingSeparator))
+            its setMinimumFractionDigits:(str's containsString:(decSeparator))
+        end if
+        -- Derive NSDecimalNumbers from the inputs, add together, convert the result back to NSString.
+        set increment to (|⌘|'s class "NSArray"'s arrayWithArray:({increment}))'s firstObject()
+        if ((increment's isKindOfClass:(|⌘|'s class "NSNumber")) as boolean) then ¬
+            set increment to its stringFromNumber:(increment)
+        set sum to (its numberFromString:(str))'s decimalNumberByAdding:(its numberFromString:(increment))
+        set output to its stringFromNumber:(sum)
+    end tell
+    -- Adjustments for AppleScript norms the NSNumberFormatter may omit from scientific notation output:
+    if (symbolRange's |length|() > 0) then
+        -- If no decimal separator in the output mantissa, insert point zero or not to match the input style.
+        if ((output's containsString:(decSeparator)) as boolean) then
+        else if ((str's containsString:(decSeparator)) as boolean) then
+            set output to output's stringByReplacingOccurrencesOfString:("(?<=^-?\\d)") ¬
+                withString:((decSeparator as text) & "0") options:(regex) range:({0, output's |length|()})
+        end if
+        -- If no sign in an E-notation exponent, insert "+" or not ditto.
+        if (((output's rangeOfString:("[Ee][+-]") options:(regex))'s |length|() > 0) as boolean) then
+        else if (((str's rangeOfString:("[Ee][+-]") options:(regex))'s |length|() > 0) as boolean) then
+            set output to output's stringByReplacingOccurrencesOfString:("(?<=[Ee])") ¬
+                withString:("+") options:(regex) range:({0, output's |length|()})
+        end if
+    end if
+
+    return output as text -- Return as AppleScript text.
+end incrementNumericalString:byAmount:localeID:
+
+return {¬
+    (my incrementNumericalString:"12345" byAmount:1), ¬
+    (my incrementNumericalString:"999,999,999,999,999" byAmount:5), ¬
+    (my incrementNumericalString:"-1.234" byAmount:10 localeID:"en"), ¬
+    (my incrementNumericalString:"-1,234E+1" byAmount:10 localeID:"fr_FR"), ¬
+    (my incrementNumericalString:"-1.234 x 10^1" byAmount:"10") ¬
+        }