Double-Value Unicode?

Scott Rossi scott at tactilemedia.com
Sat May 17 13:54:13 EDT 2014


Maybe unnecessary for LC7, but for my work in LC6 (and anybody that's
interested), I put together the following functions for converting a
unicode surrogate pair to a single value and vice versa:

function unicodePairToNum pNum1,pNum2
    return (pNum1 - 55296) * 1024 + (pNum2 - 56320) + 65536
end unicodePairToNum

function numToUnicodePair pNum
   put trunc((pNum - 65536)/1024 + 55296) into num1
   put (pNum - 65536) mod 1024 + 56320 into num2
   return num1,num2
end numToUnicodePair



Thanks to Richmond for the link to unicode character calculations:
http://www.russellcottrell.com/greek/utilities/SurrogatePairCalculator.htm



One item that would be helpful to know is at what value does a unicode
character start being represented as pairs?  Is 65536 the upper limit for
single value characters?


Thanks & Regards,

Scott Rossi
Creative Director
Tactile Media, UX/UI Design




On 5/16/14 4:58 PM, "Scott Rossi" <scott at tactilemedia.com> wrote:

>Hi All:
>
>I thought I had figured out the display of Unicode glyphs in LC 6.6, and
>then ran up against a threshold where the value of a character is
>displayed as two values.  I'm guessing this is related to a "double-byte"
>something or other.  How does one retrieve the value of a character as a
>single value?
>
>For example, I can set the htmlText of a field to 📞 and get the
>correct unicode character to display.  But when retrieving the value for
>the character, I get: ��
>
>Can I encode/decode/jumpcode/flipcode something here to get a single
>value 
>representation of the character?
>
>(Also, I'm unable set the value of the by setting the unicodeText to
>numToChar(128222) -- only using the htmlText property seems to work).
>
>
>Thanks for helping out this uniclueless dude.
>
>Regards,
>
>Scott Rossi
>Creative Director
>Tactile Media, UX/UI Design
>






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