User:Omegatron/monobook.js/mathcharacterfixer.js

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Documentation for this user script can be added at User:Omegatron/monobook.js/mathcharacterfixer.

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// ================================================================
// Math character fixer
// by User:Omegatron

function mathfixer() {
    var txt = document.editform.wpTextbox1;

    // Convert hyphen next to a number into a minus sign character
    txt.value = txt.value.replace(/([^a-zA-Z0-9\,\_\{])-(\d)/g, '$1−$2');

    // Changes 2x3 to 2×3
    txt.value = txt.value.replace(/(\d\s?)x(\s?\d)/g, '$1×$2');

    // Changes 10^3 to 10<sup>3</sup>
//    txt.value = txt.value.replace(/(\d+)\^(\d+)/g, '$1<sup>$2</sup>');
    
    // Changes x^3 to x<sup>3</sup>
    txt.value = txt.value.replace(/([0-9a-zA-Z])\^(\d+)/g, '$1<sup>$2</sup>');

    // Changes 2 +/- 3 to 2±3
    txt.value = txt.value.replace(/(\s|\d)\+\/(-|−|-)(\s|\d)/g, '$1±$3');

    // Add a tag to the summary box
    var txt = document.editform.wpSummary;
    var summary = "[[User:Omegatron#Regular expressions|Regex math character fixer]]";
	if (txt.value.indexOf(summary) == -1) {
		if (txt.value.match(/[^\*\/\s][^\/\s]?\s*$/)) {
			txt.value += " | ";
		}
		txt.value += summary;
	}

    // Press the diff button to check it
    document.editform.wpDiff.click()
}