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Purgeandfire · **on:** August 16, 2012, 05:47:14 PM

This library will calculate the width of a string in pixels. This is used in word wrapping.

I have updated my old library a bit.

For those who don't know how to use it, try making a paragraph written in a multiboard. If you want that text to be dynamic, it is going to be very painful, and using |n will have a lot of problems. StringLength() is an option but it is unreliable when trying to word wrap since not all characters are the same width. It will end up looking pretty sloppy if you use all skinny characters and may bug out if you use all massive letters.

Enjoy, I'll update my word wrap library and post it later. Requires Ascii by Bribe, link is in the code.

Code: jass

library StringSize /* v2.1.0.0 
********************************************************************
*
*  This library can calculate the width of a string in pixels.
*  Useful for word wrapping in multiboards and texttags. 
*
*  The sizes might not be 100% accurate but are far more reliable
*  than using just StringLength().
*
*  Note that actual sizes may very depending on resolution.
*
*********************************************************************
*
*   */uses/*
*   
*       */ Ascii /*       https://wc3modding.info/4472/snippet-ascii/
*
*********************************************************************
*
*  function MeasureString takes string source returns real
*
*      - Measures the string and returns the calculated width.
*
*  function MeasureCharacter takes string char returns real
*
*      - Returns the width of an individual character.
*
*********************************************************************
*
*  struct StringSize
*
*      static method measure takes string source returns real
*
*      static method measureChar takes string char returns real
*
*********************************************************************
*
*  Credits
*
*    - Bob666 aka N-a-z-g-u-l for the character widths.
*    - Tukki for pointing out an error in the system.    
*
*********************************************************************/
 
    globals
        private real array size
    endglobals
    
    private module StringSizeModule
        static method onInit takes nothing returns nothing
            set size[124]  =  3
            set size[39]   =  4
            set size[58]   =  4
            set size[59]   =  4
            set size[46]   =  4
            set size[44]   =  4
            set size[49]   =  5
            set size[105]  =  5
            set size[33]   =  5
            set size[108]  =  6
            set size[73]   =  6
            set size[106]  =  6
            set size[40]   =  6
            set size[91]   =  6
            set size[93]   =  6
            set size[123]  =  6
            set size[125]  =  6
            set size[32]   =  7
            set size[34]   =  7
            set size[41]   =  7
            set size[74]   =  7
            set size[114]  =  8
            set size[102]  =  8
            set size[96]   =  8
            set size[116]  =  9
            set size[45]   =  9
            set size[92]   =  9
            set size[42]   =  9
            set size[70]   = 10
            set size[115]  = 11
            set size[47]   = 11
            set size[63]   = 11
            set size[69]   = 12
            set size[76]   = 12
            set size[55]   = 12
            set size[43]   = 12
            set size[61]   = 12
            set size[60]   = 12
            set size[62]   = 12
            set size[36]   = 12
            set size[97]   = 12
            set size[107]  = 13
            set size[84]   = 13
            set size[99]   = 13
            set size[83]   = 13
            set size[110]  = 13
            set size[122]  = 13
            set size[80]   = 13
            set size[51]   = 13
            set size[53]   = 13
            set size[95]   = 13
            set size[126]  = 13
            set size[94]   = 13
            set size[98]   = 14
            set size[66]   = 14
            set size[54]   = 14
            set size[118]  = 14
            set size[101]  = 14
            set size[120]  = 14
            set size[121]  = 14
            set size[50]   = 14
            set size[57]   = 14
            set size[104]  = 14
            set size[117]  = 14
            set size[111]  = 15
            set size[100]  = 15
            set size[48]   = 15
            set size[103]  = 15
            set size[56]   = 15
            set size[52]   = 15
            set size[113]  = 15
            set size[112]  = 15
            set size[115]  = 15
            set size[67]   = 16
            set size[82]   = 16
            set size[90]   = 16
            set size[86]   = 16
            set size[89]   = 16
            set size[68]   = 16
            set size[75]   = 16
            set size[85]   = 16
            set size[35]   = 16
            set size[78]   = 17
            set size[72]   = 17
            set size[37]   = 17
            set size[71]   = 18
            set size[88]   = 18
            set size[64]   = 18
            set size[65]   = 19
            set size[119]  = 20
            set size[79]   = 20
            set size[109]  = 21
            set size[81]   = 21
            set size[38]   = 21
            set size[77]   = 25
            set size[87]   = 26
        endmethod
    endmodule
 
    struct StringSize extends array
        static method measureChar takes string char returns real
            return size[Char2Ascii(char)]
        endmethod
        
        static method measure takes string s returns real
            local integer i = 0
            local integer l = StringLength(s)
            local real result = 0
            local string sub = ""
            if l == 0 then
                return 0.
            elseif l == 1 then
                return size[Char2Ascii(s)]
            endif
            loop
                exitwhen i >= l 
                set sub = SubString(s, i, i+1)
                if sub == "|" then
                    set sub = SubString(s, i+1, i+2)
                    if sub == "c" then
                        set i = i + 9
                    elseif sub == "r" then
                        set i = i + 1
                    else
                        set result = result + size[124]
                    endif
                else
                    set result = result + size[Char2Ascii(sub)]
                endif
                set i = i + 1
            endloop
            return result
        endmethod
        
        implement StringSizeModule
    endstruct
 
    function MeasureString takes string s returns real
        return StringSize.measure(s)
    endfunction
 
    function MeasureCharacter takes string s returns real
        return StringSize.measureChar(s)
    endfunction
 
endlibrary
 
 

Some notes:
- I'm not really sure which is faster, hashtable saving or ascii conversion. However, I use ascii and I don't remember which characters are for which values since the old wc3jass went down.

EDIT: Updated with optimizations and fixed the compile errors.

moyack · **Reply #1 on:** September 02, 2012, 09:19:49 AM

I don't know why I haven't seen this library... hmmm, anyways, checked and nothing was away from usual so approved!!

Magtheridon96 · **Reply #2 on:** September 02, 2012, 11:24:52 PM

Char2Ascii("|") will return a constant value :p
Replace it with 124:

Code: jass

result = result + size[124 /* Char2Ascii("|") */]

Purgeandfire · **Reply #3 on:** September 06, 2012, 04:55:13 PM

Thanks, I forgot about that. Updated.

In fact, I can replace size[124] with the direct value since it is constant, but I'll do that later since I'm not on my modding comp.