Just a short, simple blog for Bob to share his thoughts.
31 May 2011 • by Bob • IIS, Scripting, SharePoint
I ran into an interesting situation recently - I host a website for a friend of mine, and he was shopping around for a new website template. He found one that he liked, but he didn't like the colors. In fact, he wanted the exact opposite of the colors in the website template, so he asked what I could do about it.
I looked at the website template, and thankfully it was using linked Cascading Style Sheets (CSS) files for all of the color definitions, so I told him that changing the colors would probably be a pretty easy thing to do. However, once I cracked open the CSS files from the website template, I found that they had hundreds of color definitions. Changing every color definition by hand would have taken hours, so I decided to write some Windows Script Host (WSH) code to do the work for me.
With the above scenario in mind, here's the script that I wrote to negatize every color in a CSS file - all that you need to do is replace the paths to the input and output files and run the script to create the negatized version of the input CSS file.
Option Explicit Const strInputFile = "c:\inetpub\wwwroot\style-dark.css" Const strOutputFile = "c:\inetpub\wwwroot\style-light.css" ' ------------------------------------------------------------ Dim objFSO Dim objInputFile Dim objOutputFile Dim strInputLine Dim strLeft, strMid, strRight, strArray Dim blnFound ' ------------------------------------------------------------ Const strTempRGB = "[|[TMPRGBSTR1NG]|]" Const strTempHEX = "[|[TMPHEXSTR1NG]|]" ' ------------------------------------------------------------ Set objFSO = CreateObject("scripting.filesystemobject") Set objInputFile = objFSO.OpenTextFile(strInputFile) Set objOutputFile = objFSO.CreateTextFile(strOutputFile) Do While Not objInputFile.AtEndOfStream strInputLine = objInputFile.ReadLine blnFound = True Do While blnFound If InStr(1,strInputLine,"rgb(",vbTextCompare) Then strLeft = Left(strInputLine,InStr(1,strInputLine,"rgb(",vbTextCompare)-1) strMid = Mid(strInputLine,InStr(1,strInputLine,"rgb(",vbTextCompare)+4) strRight = Mid(strMid,InStr(strMid,")")+1) strMid = Left(strMid,InStr(strMid,")")-1) strArray = Split(strMid,",") strMid = InvertOctet(CInt(strArray(0))) & _ "," & InvertOctet(CInt(strArray(1))) & _ "," & InvertOctet(CInt(strArray(2))) strInputLine = strLeft & strTempRGB & "(" & strMid & ")" & strRight Else blnFound = False End If Loop strInputLine = Replace(strInputLine,strTempRGB,"rgb") blnFound = True Do While blnFound If InStr(strInputLine,"#") Then strLeft = Left(strInputLine,InStr(strInputLine,"#")-1) strMid = Mid(strInputLine,InStr(strInputLine,"#")+1) If Len(strMid)>6 Then strRight = Mid(strMid,7) strMid = Left(strMid,6) ElseIf Len(strMid)>3 Then strRight = Mid(strMid,4) strMid = Left(strMid,3) Else strRight = "" End If If IsHexString(strMid) Then If Len(strMid) = 6 Then strMid = Right("0" & Hex(InvertOctet(CInt("&h" & Left(strMid,2)))),2) & _ Right("0" & Hex(InvertOctet(CInt("&h" & Mid(strMid,3,2)))),2) & _ Right("0" & Hex(InvertOctet(CInt("&h" & Right(strMid,2)))),2) Else strMid = Hex(InvertByte(CInt("&h" & Left(strMid,2)))) & _ Hex(InvertByte(CInt("&h" & Mid(strMid,3,2)))) & _ Hex(InvertByte(CInt("&h" & Right(strMid,2)))) End If End If strInputLine = strLeft & strTempHEX & strMid & strRight Else blnFound = False End If Loop strInputLine = Replace(strInputLine,strTempHEX,"#") objOutputFile.WriteLine strInputLine Loop ' ------------------------------------------------------------ Function IsHexString(ByVal tmpString) Dim blnHexString, intHexCount, intHexByte blnHexString = True If Len(tmpString)<>3 and Len(tmpString)<>6 Then blnHexString = False Else tmpString = UCase(tmpString) For intHexCount = 1 To Len(tmpString) intHexByte = Asc(Mid(tmpString,intHexCount,1)) If (intHexByte < 48 Or intHexByte > 57) And (intHexByte < 65 Or intHexByte > 70) Then blnHexString = False End If Next End If IsHexString = blnHexString End Function ' ------------------------------------------------------------ Function InvertByte(ByVal tmpByte) tmpByte = tmpByte And 15 tmpByte = 15 - tmpByte InvertByte = tmpByte End Function ' ------------------------------------------------------------ Function InvertOctet(ByVal tmpOctet) tmpOctet = tmpOctet And 255 tmpOctet = 255 - tmpOctet InvertOctet = tmpOctet End Function ' ------------------------------------------------------------
After I wrote the above script, I found myself using it for a bunch of different websites that I manage for other people. One of the websites that I host is based on SharePoint 2007, so I wondered how difficult it would be negatize a SharePoint 2007 theme. As it turns out, it's pretty easy. The following steps will walk you through the steps that are required to create a negatized version of the built-in "Classic" SharePoint 2007 theme.
(NOTE: The steps in this section do not work with SharePoint 2010 or office 14; SharePoint 2010 and Office 14 store their themes in a different format, so these steps will not work.)
<SPThemes> collection:
<Templates> <TemplateID>classicnegative</TemplateID> <DisplayName>Classic Negative</DisplayName> <Description>Classic Negative</Description> <Thumbnail>images/thclassic.gif</Thumbnail> <Preview>images/thclassic.gif</Preview> </Templates>
That's all it takes to negate the colors that are defined in the CSS files for a SharePoint 2007 theme. (NOTE: This does not modify the colors of the images in the SharePoint theme; you will need a graphics program to update the colors in the images.)
Before I receive any comments, I am perfectly aware that "negatize" is not an actual word in the English language, but it seemed appropriate, and new words have to start somewhere.
Note: This blog was originally posted at http://blogs.msdn.com/robert_mcmurray/
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