for bug 33808. 255 chars limit for download title.

cell/api.js

@@ -726,7 +726,7 @@ var editor;
     oAdditionalData["userid"] = this.documentUserId;
     oAdditionalData["jwt"] = this.CoAuthoringApi.get_jwt();
     oAdditionalData["outputformat"] = sFormat;
-    oAdditionalData["title"] = AscCommon.changeFileExtention(this.documentTitle, AscCommon.getExtentionByFormat(sFormat));
+    oAdditionalData["title"] = AscCommon.changeFileExtention(this.documentTitle, AscCommon.getExtentionByFormat(sFormat), Asc.c_nMaxDownloadTitleLen);
     if (DownloadType.Print === options.downloadType) {
       oAdditionalData["inline"] = 1;
     }

common/commonDefines.js

@@ -44,6 +44,7 @@
 	var c_oAscMaxColumnWidth  = 255;
 	var c_oAscMaxRowHeight    = 409;
 	var c_nMaxConversionTime  = 900000;//depends on config
+	var c_nMaxDownloadTitleLen= 255;
 
 	//files type for Saving & DownloadAs
 	var c_oAscFileType = {
@@ -1081,6 +1082,7 @@
 	window['Asc']['c_oAscMaxColumnWidth']  = window['Asc'].c_oAscMaxColumnWidth = c_oAscMaxColumnWidth;
 	window['Asc']['c_oAscMaxRowHeight'] = window['Asc'].c_oAscMaxRowHeight = c_oAscMaxRowHeight;
     window['Asc']['c_nMaxConversionTime'] = window['Asc'].c_nMaxConversionTime = c_nMaxConversionTime;
+	window['Asc']['c_nMaxDownloadTitleLen'] = window['Asc'].c_nMaxDownloadTitleLen = c_nMaxDownloadTitleLen;
 	window['Asc']['c_oAscFileType'] = window['Asc'].c_oAscFileType = c_oAscFileType;
 	prot                         = c_oAscFileType;
 	prot['UNKNOWN']              = prot.UNKNOWN;

common/editorscommon.js

@@ -861,10 +861,14 @@ function GetFileExtension (sName) {
 		return sName.substring(nIndex + 1).toLowerCase();
 	return null;
 }
-function changeFileExtention (sName, sNewExt) {
+function changeFileExtention (sName, sNewExt, opt_lengthLimit) {
   var sOldExt = GetFileExtension(sName);
-  if(sOldExt) {
-    return sName.substring(0, sName.length - sOldExt.length) + sNewExt;
+  var nIndexEnd = sOldExt ? sName.length - sOldExt.length - 1 : sName.length;
+  if (opt_lengthLimit && nIndexEnd + sNewExt.length + 1 > opt_lengthLimit) {
+	  nIndexEnd = opt_lengthLimit - sNewExt.length - 1;
+  }
+  if(nIndexEnd < sName.length) {
+    return sName.substring(0, nIndexEnd) + '.' + sNewExt;
   } else {
     return sName + '.' + sNewExt;
   }

slide/api.js

@@ -6063,7 +6063,7 @@ background-repeat: no-repeat;\
 		oAdditionalData["userid"]       = this.documentUserId;
 		oAdditionalData["jwt"]         = this.CoAuthoringApi.get_jwt();
 		oAdditionalData["outputformat"] = filetype;
-		oAdditionalData["title"]        = AscCommon.changeFileExtention(this.documentTitle, AscCommon.getExtentionByFormat(filetype));
+		oAdditionalData["title"]        = AscCommon.changeFileExtention(this.documentTitle, AscCommon.getExtentionByFormat(filetype), Asc.c_nMaxDownloadTitleLen);
 		oAdditionalData["savetype"]     = AscCommon.c_oAscSaveTypes.CompleteAll;
 		if (DownloadType.Print === options.downloadType)
 		{

word/api.js

@@ -6464,7 +6464,7 @@ background-repeat: no-repeat;\
 		oAdditionalData["userid"]       = this.documentUserId;
 		oAdditionalData["jwt"]         = this.CoAuthoringApi.get_jwt();
 		oAdditionalData["outputformat"] = filetype;
-		oAdditionalData["title"]        = AscCommon.changeFileExtention(this.documentTitle, AscCommon.getExtentionByFormat(filetype));
+		oAdditionalData["title"]        = AscCommon.changeFileExtention(this.documentTitle, AscCommon.getExtentionByFormat(filetype), Asc.c_nMaxDownloadTitleLen);
 		oAdditionalData["savetype"]     = AscCommon.c_oAscSaveTypes.CompleteAll;
 		if ('savefromorigin' === command)
 		{