I Have A Div With ContentEditable="true" And Need To Color The Numbers Entered

May 05, 2023 Post a Comment

Here is my code that works well for coloring the numbers in editable div but the cursor is going to the start of the div and it should work normal when I press keyboard arrow butto

Solution 1:

elimate the keys that you don't want to run the function, something like this (i.e. should just behave as normal)

$("#richTextField").keyup(function(e) {
    var excludeKeyCodes = [8, 9, 13, 46, 35 ,36 ,37, 38, 39, 40];
    if( !$.inArray(e.which, excludeKeyCodes ))
    {
        var divContent = $(this).text();
        var pattern = /(\d)/g;
        var replaceWith = '<span class="numberClass"'+ '>$1</span>';
        var highlighted = divContent.replace(pattern,replaceWith);        
        $(this).html(highlighted);
    }
});

for reference javascript key codes

quick summary

8 - Backspace, 9 - Tab, 13 - Enter, 46 - delete, 35 - end, 36 - home, 37,38,39,40 - arrows (left,up,right,down)

Solution 2:

The following does what you want:

jQuery(document).ready(function () {

    $("#richTextField").keyup(function () {

        var divContent = $(this).text().split('');
        var pattern = /(\d)/;
        var replaceWith = '<span class="numberClass"' + '>$1</span>';
        var highlighted = divContent.map(function (u) {
            if (pattern.test(u)) return $(u.replace(pattern, replaceWith));
            else return document.createTextNode(u);
        });

        var caretPos = getCaretCharacterOffsetWithin(this);

        $(this).empty().append(highlighted);

        setCursor(this, caretPos);
    });
});

function getCaretCharacterOffsetWithin(element) {
    var caretOffset = 0;
    if (typeof window.getSelection != "undefined") {
        var range = window.getSelection().getRangeAt(0);
        var preCaretRange = range.cloneRange();
        preCaretRange.selectNodeContents(element);
        preCaretRange.setEnd(range.endContainer, range.endOffset);
        caretOffset = preCaretRange.toString().length;
    } else if (typeof document.selection != "undefined" && document.selection.type != "Control") {
        var textRange = document.selection.createRange();
        var preCaretTextRange = document.body.createTextRange();
        preCaretTextRange.moveToElementText(element);
        preCaretTextRange.setEndPoint("EndToEnd", textRange);
        caretOffset = preCaretTextRange.text.length;
    }
    return caretOffset;
}

function setCursor(node, pos) {
    if (!node) {
        return false;
    } else if (document.createRange) {
        range = document.createRange();
        range.selectNodeContents(node);
        range.setStart(node, pos);
        range.setEnd(node, pos);
        selection = window.getSelection();
        selection.removeAllRanges();
        selection.addRange(range);
    } else if (node.createTextRange) {
        var textRange = node.createTextRange();
        textRange.collapse(true);
        textRange.moveEnd(pos);
        textRange.moveStart(pos);
        textRange.select();
        return true;
    } else if (node.setSelectionRange) {
        node.setSelectionRange(pos, pos);
        return true;
    }
    return false;
}