User:Mr. Stradivarius/chessboardfix.js

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Documentation for this user script can be added at User:Mr. Stradivarius/chessboardfix.

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/* This script fixes duplicate parameters in chess template invocations. To
* install it, put the following code in [[Special:MyPage/skin.js]]:
 
importScript('User:Mr. Stradivarius/chessboardfix.js'); // Linkback: [[User:Mr. Stradivarius/chessboardfix.js]]

* To use the script, open the page you want to fix in edit view, highlight the
* chess template invocation that you want to fix, and click the
* "Fix chessboards" link in the toolbar (below "what links here").
* If the chess template uses the previous standard invocation style, then it
* will be converted to the new style. In other words, template invocations like
* this:

{{Chess diagram
| tright
| 
|= 

 8 |rd|nd|bd|qd|kd|bd|nd|rd|=
 7 |pd|pd|pd|pd|  |pd|pd|pd|=
 6 |  |  |  |  |  |  |  |  |=
 5 |  |  |  |  |pd|  |  |  |=
 4 |  |  |  |  |pl|pl|  |  |=
 3 |  |  |  |  |  |  |  |  |=
 2 |pl|pl|pl|pl|  |  |pl|pl|=
 1 |rl|nl|bl|ql|kl|bl|nl|rl|=
    a  b  c  d  e  f  g  h  

| The King's Gambit
}}

* Will be transformed into template invocations like this:

{{Chess diagram
| tright
| 

|rd|nd|bd|qd|kd|bd|nd|rd
|pd|pd|pd|pd|  |pd|pd|pd
|  |  |  |  |  |  |  |  
|  |  |  |  |pd|  |  |  
|  |  |  |  |pl|pl|  |  
|  |  |  |  |  |  |  |  
|pl|pl|pl|pl|  |  |pl|pl
|rl|nl|bl|ql|kl|bl|nl|rl

| The King's Gambit
}}

* Please check that the script produces the correct output; there is a chance
* that it may mangle the page code, particularly if it is used on unusual types
* of chessboard template or on normal wikitext.
*/

var myContent = document.getElementsByName( 'wpTextbox1' )[0];

function replaceSelection( replace ) {
	// Replace currently selected text with the replace variable. The replace
	// variable can be a string or a callback function. The callback function
	// takes the selection text as its first and only argument, and must return
	// the string to replace the selection with.
	var len = myContent.value.length;
	var start = myContent.selectionStart;
	var end = myContent.selectionEnd;
	var sel = myContent.value.substring( start, end );

	if ( typeof( replace ) == 'function' ) {
		replace = replace( sel );
	}

	myContent.value = myContent.value.substring( 0, start )
		+ replace
		+ myContent.value.substring( end, len );
}

function wpChessboardFix() {
	replaceSelection( function ( sel ) {
		sel = sel.replace( /\n *\d+ *((?:\| *.. *)+)\| *= */g, '\n$1' );
		sel = sel.replace( /\n *\|= *\n+/g, '\n\n' );
		sel = sel.replace( /\n *(?:[a-zA-Z][a-zA-Z]?\b *)+\n+/g, '\n\n' );
		sel = sel.replace( /\n *[bB]oard *\w+ *\n+/g, '\n' );
		return sel;
	} );
}

function TTscriptButton() {
  addPortletLink('p-tb','javascript:wpChessboardFix()','Fix chessboards','t-chessboardfix');
}

if (wgNamespaceNumber != -1 && myContent) {
	addOnloadHook(TTscriptButton);
}