I have this svg

<circle id="a/b/c" stroke="#2C2C2C" stroke-width="2" fill="#FFF" fill-rule="nonzero" cx="141" cy="21" r="9"/><text id="a/b/c-something" font-size="10" fill="#2C2C2C"><tspan x="0" y="10">a/b/c Something</tspan></text>

I want to replace id="a/b/c" to id="a-b-c" in the circle and also id="a/b/c-something" to id="a-b-c-something" in text and exclude a/b/c Something from being replaced.

I'm using vscode, and I've tried (id=. )\/(. ) but it doesn't seem to match it properly. I want to

CodePudding user response：

A generic way to do this is to match and capture the part before the first qualifying / char, match this char without capturing, and then match the part on the right to ensure the context is correct, and then replace with Group 1 value new char Group 2 value.

The general scheme is

Find:    (left-hand context)text to remove/replace(right-hand context)
Replace: $1new_text$2

Then repeat until no more changes are made to the document.

In your case, you can use

Find What:   (\sid="[^"/]*)/([^"]*"[^>]*>)
Replace With: $1-$2

See the regex demo. Details:

• ( - Group 1:
  • \s - a whitespace
  • id=" - a fixed text
  • [^"]* - zero or more chars other than a " char
• ) - end of Group 1
• / - a / char
• ( - Group 2:
  • [^"]* - zero or more chars other than "
  • " - a " char
  • [^>]* - zero or more chars other than >
  • > - a > char
• ) - end of Group 2.

This will work for both File search and replace and In-document search and replace feature.

If you are applying the regex against a single document using In-document search and replace feature, you can make use of a lookaround-based pattern to achieve the goal in a single pass:

Find What:   (?<=\sid="[^"]*)/(?=[^"]*"[^>]*>)
Replace With: -

See this regex demo. Details:

• (?<=\sid="[^"]*) - a positive lookbehind that matches a location that is immediately preceded with
  • \s - a whitespace
  • id=" - a fixed text
  • [^"]* - zero or more chars other than a " char
• / - a / char
• (?=[^"]*"[^>]*>) - a positive looahead that matches a location that is immediately followed with
  • [^"]* - zero or more chars other than "
  • " - a " char
  • [^>]* - zero or more chars other than >
  • > - a > char.

CodePudding user response：

I will do match and replace

string pattern = @"id=\""([\w\/] )";
string input = @"<circle id=""a/b/c"" stroke=""#2C2C2C"" stroke-width=""2"" fill=""#FFF"" fill-rule=""nonzero"" cx=""141"" cy=""21"" r=""9""/>
                 <text id=""a/b/c-something"" font-size=""10"" fill=""#2C2C2C""><tspan x=""0"" y=""10"">a/b/c Something</tspan></text>";
foreach (Match m in Regex.Matches(input, pattern))
{
    string newID = m.Value.Replace("/", "-");
    input = input.Replace(m.Value, newID);
}
Console.WriteLine(input);