we have system integrated rhino javascript engine. can upload javascript files to deal set of data.
i need truncate string based on pixel width, avoid expands limited size box. impossible hard-code character length because length depends on character.
if normal browser based html application, have used of span or div width, write function. in case cannot use html elements. planing write function keeping array of pixel widths of each character. (in case need arial normal 10px).
but couldn't find resource pixel widths of arial. can share link?
if know better or easy solution, please let me know.
found solution :-) wrote width array programmatically.
in c# used measurestring() method
font stringfont = new font("arial", 10); string s=""; (int = 1; < 256; i++) { char c = (char)i; s = s + "widths[" + + "]=" + creategraphics().measurestring(c.tostring(), stringfont).width.tostring() + ";\n"; } messagebox.show(s); it generated me array, used in javascript.
var widths = new array(); widths[1]=19.54427; widths[2]=4.440104; widths[3]=4.440104; widths[4]=4.440104; widths[5]=4.440104; widths[6]=4.440104; widths[7]=4.440104; widths[8]=4.440104; widths[9]=57.77343; widths[10]=4.440104; widths[11]=4.440104; widths[12]=4.440104; widths[13]=4.440104; widths[14]=4.440104; widths[15]=4.440104; widths[16]=4.440104; widths[17]=4.440104; widths[18]=4.440104; widths[19]=4.440104; widths[20]=4.440104; widths[21]=4.440104; widths[22]=4.440104; widths[23]=4.440104; widths[24]=4.440104; widths[25]=4.440104; widths[26]=4.440104; widths[27]=4.440104; widths[28]=4.440104; widths[29]=4.440104; widths[30]=4.440104; widths[31]=4.440104; widths[32]=4.444443; widths[33]=8.259547; widths[34]=9.320745; widths[35]=12.08116; widths[36]=12.08116; widths[37]=16.65798; widths[38]=13.6046; widths[39]=7.068141; widths[40]=9.014755; widths[41]=9.014755; widths[42]=9.789495; widths[43]=12.46528; widths[44]=8.259547; widths[45]=9.014755; widths[46]=8.259547; widths[47]=8.259547; widths[48]=12.08116; widths[49]=12.08116; widths[50]=12.08116; widths[51]=12.08116; widths[52]=12.08116; widths[53]=12.08116; widths[54]=12.08116; widths[55]=12.08116; widths[56]=12.08116; widths[57]=12.08116; widths[58]=8.259547; widths[59]=8.259547; widths[60]=12.46528; widths[61]=12.46528; widths[62]=12.46528; widths[63]=12.08116; widths[64]=18.38324; widths[65]=13.6046; widths[66]=13.6046; widths[67]=14.35981; widths[68]=14.35981; widths[69]=13.6046; widths[70]=12.83637; widths[71]=15.12804; widths[72]=14.35981; widths[73]=8.259547; widths[74]=11.31293; widths[75]=13.6046; widths[76]=12.08116; widths[77]=15.88324; widths[78]=14.35981; widths[79]=15.12804; widths[80]=13.6046; widths[81]=15.12804; widths[82]=14.35981; widths[83]=13.6046; widths[84]=12.83637; widths[85]=14.35981; widths[86]=13.6046; widths[87]=17.40668; widths[88]=13.6046; widths[89]=13.6046; widths[90]=12.83637; widths[91]=8.259547; widths[92]=8.259547; widths[93]=8.259547; widths[94]=10.88976; widths[95]=12.08116; widths[96]=9.014755; widths[97]=12.08116; widths[98]=12.08116; widths[99]=11.31293; widths[100]=12.08116; widths[101]=12.08116; widths[102]=8.259547; widths[103]=12.08116; widths[104]=12.08116; widths[105]=7.497828; widths[106]=7.497828; widths[107]=11.31293; widths[108]=7.497828; widths[109]=15.88324; widths[110]=12.08116; widths[111]=12.08116; widths[112]=12.08116; widths[113]=12.08116; widths[114]=9.014755; widths[115]=11.31293; widths[116]=8.259547; widths[117]=12.08116; widths[118]=11.31293; widths[119]=14.35981; widths[120]=11.31293; widths[121]=11.31293; widths[122]=11.31293; widths[123]=9.034286; widths[124]=8.012151; widths[125]=9.034286; widths[126]=12.46528; widths[127]=4.440104; widths[128]=4.440104; widths[129]=4.440104; widths[130]=11.99219; widths[131]=11.99219; widths[132]=4.440104; widths[133]=4.440104; widths[134]=11.99219; widths[135]=11.99219; widths[136]=9.941405; widths[137]=16.25651; widths[138]=11.74479; widths[139]=11.99219; widths[140]=19.51823; widths[141]=4.440104; widths[142]=4.440104; widths[143]=4.440104; widths[144]=4.440104; widths[145]=7.467447; widths[146]=7.467447; widths[147]=10.78125; widths[148]=10.78125; widths[149]=4.440104; widths[150]=12.46745; widths[151]=19.45963; widths[152]=9.54427; widths[153]=18.49609; widths[154]=9.941405; widths[155]=8.216145; widths[156]=12.83203; widths[157]=4.440104; widths[158]=4.440104; widths[159]=15; widths[160]=4.444443; widths[161]=9.014755; widths[162]=12.08116; widths[163]=12.08116; widths[164]=12.08116; widths[165]=12.08116; widths[166]=8.012151; widths[167]=12.08116; widths[168]=9.014755; widths[169]=14.56163; widths[170]=9.529078; widths[171]=12.08116; widths[172]=12.46528; widths[173]=4.440104; widths[174]=14.56163; widths[175]=12.02908; widths[176]=9.939235; widths[177]=11.98351; widths[178]=9.014755; widths[179]=9.014755; widths[180]=9.014755; widths[181]=12.3546; widths[182]=11.82074; widths[183]=9.014755; widths[184]=9.014755; widths[185]=9.014755; widths[186]=9.457463; widths[187]=12.08116; widths[188]=15.89627; widths[189]=15.89627; widths[190]=15.89627; widths[191]=12.83637; widths[192]=13.6046; widths[193]=13.6046; widths[194]=13.6046; widths[195]=13.6046; widths[196]=13.6046; widths[197]=13.6046; widths[198]=18.17491; widths[199]=14.35981; widths[200]=13.6046; widths[201]=13.6046; widths[202]=13.6046; widths[203]=13.6046; widths[204]=8.259547; widths[205]=8.259547; widths[206]=8.259547; widths[207]=8.259547; widths[208]=14.35981; widths[209]=14.35981; widths[210]=15.12804; widths[211]=15.12804; widths[212]=15.12804; widths[213]=15.12804; widths[214]=15.12804; widths[215]=12.46528; widths[216]=15.12804; widths[217]=14.35981; widths[218]=14.35981; widths[219]=14.35981; widths[220]=14.35981; widths[221]=13.6046; widths[222]=13.6046; widths[223]=12.83637; widths[224]=12.08116; widths[225]=12.08116; widths[226]=12.08116; widths[227]=12.08116; widths[228]=12.08116; widths[229]=12.08116; widths[230]=16.65798; widths[231]=11.31293; widths[232]=12.08116; widths[233]=12.08116; widths[234]=12.08116; widths[235]=12.08116; widths[236]=8.259547; widths[237]=8.259547; widths[238]=8.259547; widths[239]=8.259547; widths[240]=12.08116; widths[241]=12.08116; widths[242]=12.08116; widths[243]=12.08116; widths[244]=12.08116; widths[245]=12.08116; widths[246]=12.08116; widths[247]=11.98351; widths[248]=12.83637; widths[249]=12.08116; widths[250]=12.08116; widths[251]=12.08116; widths[252]=12.08116; widths[253]=11.31293; widths[254]=12.08116; widths[255]=11.31293; finally javascript function.
function smarttruncate(str,maxlen){ var widths = new array(); widths[1]=19.54427; //assigning above values var len = 0; ( =0; < str.length ; i++){ var ascii = str.charcodeat(i); len = len + widths[ascii]; if (len>maxlen) { if(i==0) { i=1; } str = str.substring(0, i-1); break; } } return str; } 
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