User:Waldyrious/formatcitations.js

function formatCitations(vertical) {
    var txt = document.editform.wpTextbox1;
 
    // Fill an array with one entry per each recognized citation template
    // Note: the regex should be changed to allow parameter values that are themselves templates,
    // e.g. {{cite book | author = John Doe | title = The Book | year = 1234 | ref = {{sfnRef|Doe (1234)}} | isbn = 0-12345-678-9 }}
    // I got as far as this: /(\{\{it(?:ation|(?:ar|e) +)\s*)(\|\s*+=\s*(?:\{\{)?.+(?:\}\})?\s*)+(\}\})/g
    var originalTemplates = txt.value.match(/\{\{it(ation|(ar|e) +) *\n? *\|+\}\}/g);
    // Duplicate the array, for editing. We need to keep the original strings for the replacement step
    var tweakedTemplates  = originalTemplates.slice();

    for(var i = 0; i < originalTemplates.length; i++) {
        if(vertical) {
            // Fill an array with one entry per each parameter for this citation template
            var originalParams = originalTemplates.match(/ *\n? *\| *\n? *+ *= */g);
            // Create array to be filled with the cleaned-up parameters.
            // We need to keep the original strings for the replacement step.
            var tweakedParams = ;

            var maxWidth = 0;
            for(var j = 0; j < originalParams.length; j++){
                // Get rid of the delimiters and spaces, keep only the parameter string
                tweakedParams = originalParams.match(/+/);
                // Calculate the length of the longest parameter
                maxWidth = (tweakedParams.length>maxWidth) ? tweakedParams.length : maxWidth;
            }
            maxWidth++; // We need an extra one because Array(n).join(' ') will produce a string with n-1 chars

            // Generate the aligned versions of the parameters (with padding before the equal signs)
            for(var k = 0; k < originalParams.length; k++) {
                var numSpaces = maxWidth - tweakedParams.length;
                var alignedParam = "\n  | " + tweakedParams + new Array(numSpaces).join(" ") + " = ";
                // Replace the original parameters with the tweaked ones
                tweakedTemplates = tweakedTemplates.replace (originalParams, alignedParam);
            }

            // Also align the }}
            tweakedTemplates = tweakedTemplates.replace(/ *\n? *\}\}/g,"\n  }}"); 
            // Replace the original templates with the tweaked versions
            txt.value = txt.value.replace(originalTemplates, tweakedTemplates); 
        } else {
            // Remove newlines
            tweakedTemplates = tweakedTemplates.replace(/\n/g, "");
            // Normalize spaces around the pipes and equal signs
            tweakedTemplates = tweakedTemplates.replace(/ *\| *(+) *= */g," |$1 = ");
            // Remove potencial extra spaces before template ends
            tweakedTemplates = tweakedTemplates.replace(/ *\}\}$/," }}");
            txt.value = txt.value.replace(originalTemplates, tweakedTemplates);                                      
        }
    }

    // Update the edit summary
    var sum = document.editform.wpSummary;
    var summary = vertical ? "convert citation templates to vertical format, for readability" : "harmonize whitespace in citation templates" ;
    summary += " (using ])";
    if (sum.value.indexOf(summary) == -1) {
        if (sum.value.match(/?\s*$/)) {
            sum.value += "; ";
        }
        sum.value += summary;
    }
    if(!vertical) { document.editform.wpMinoredit.checked = true; }
}

$(function () {
    if(document.forms.editform) {
    	mw.loader.using( , function() {
	        mw.util.addPortletLink('p-cactions', 'javascript:formatCitations(false)', '{{}}', 'ca-formatcitations', 'Format citations: add whitespace', '-', '');
	        mw.util.addPortletLink('p-cactions', 'javascript:formatCitations(true)', '{{}}+', 'ca-formatcitations-vertical', 'Formats citations vertically', '-', '');
    	});
    }
});