CFLib.org – Common Function Library Project

unIndent(str)

Last updated March 7, 2009

author

Nathan Strutz

Version: 0 | Requires: CF5 | Library: StrLib

Description:
Removes unnecessary leading tabs or spaces (whitespace chars) from each line of a string, preserving the formatting while flushing the string left. It is basically a block un-indent (like your IDE probably does with shift-tab).

Return Values:
returns a string

Example:

<pre>
<cfsavecontent variable="str">
    <tag>
        <child>
    </tag>
</cfsavecontent>
<cfoutput>#htmlCodeFormat(unIndent(str))#</cfoutput>
</pre>

Parameters:

Name Description Required
str String to be modified Yes

Full UDF Source:

/**
 * Un-indents strings but preserves formatting
 * 
 * @param str 	 String to be modified (Required)
 * @return returns a string 
 * @author Nathan Strutz (strutz@gmail.com) 
 * @version 0, March 7, 2009 
 */
function unIndent(str) {
	var lines = str.split("\n");
	var i = 0;
	var minSpaceDist = 9999;
	var newStr = "";

	for(i=1; i lte arrayLen(lines); i=i+1) {
		if (len(trim(lines[i]))) {
			minSpaceDist = max( min(minSpaceDist, reFind("[\S]",lines[i])-1), 0);
		}
	}

	for(i=1; i lte arrayLen(lines); i=i+1) {
		newStr = newStr & removeChars(lines[i], 1, minSpaceDist) & chr(10);
	}
	return newStr;
}
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