/**
*  PFZCHAT JScripts
*  cf modules wikipedia
*
**/

function insertTags(txtareaid, tagOpen, tagClose, sampleText) {
    var txtarea;
    /*
    if (document.editform) {
        txtarea = document.editform.wpTextbox1;
    } else {
        var areas = document.getElementsByTagName("textarea");
        txtarea = areas[0];
    }
    */
    txtarea = document.getElementById(txtareaid);

    var selText, isSample = false;
    if (document.selection && document.selection.createRange) {
        if (document.documentElement && document.documentElement.scrollTop) {
            var winScroll = document.documentElement.scrollTop;
        } else if (document.body) {
            var winScroll = document.body.scrollTop;
        }
        txtarea.focus();
        var range = document.selection.createRange();
        selText = range.text;
        checkSelectedText();
        range.text = tagOpen + selText + tagClose;
        if (isSample && range.moveStart) {
            if (window.opera) {
                tagClose = tagClose.replace(/\n/g, "");
            }
            range.moveStart("character", - tagClose.length - selText.length);
            range.moveEnd("character", - tagClose.length);
        }
        range.select();
        if (document.documentElement && document.documentElement.scrollTop) {
            document.documentElement.scrollTop = winScroll;
        } else if (document.body) {
            document.body.scrollTop = winScroll;
        }
    } else if (txtarea.selectionStart || txtarea.selectionStart == "0") {
        var textScroll = txtarea.scrollTop;
        txtarea.focus();
        var startPos = txtarea.selectionStart;
        var endPos = txtarea.selectionEnd;
        selText = txtarea.value.substring(startPos, endPos);
        checkSelectedText();
        txtarea.value = txtarea.value.substring(0, startPos) + tagOpen + selText + tagClose + txtarea.value.substring(endPos, txtarea.value.length);
        if (isSample) {
            txtarea.selectionStart = startPos + tagOpen.length;
            txtarea.selectionEnd = startPos + tagOpen.length + selText.length;
        } else {
            txtarea.selectionStart = startPos + tagOpen.length + selText.length + tagClose.length;
            txtarea.selectionEnd = txtarea.selectionStart;
        }
        txtarea.scrollTop = textScroll;
    }

    function checkSelectedText() {
        if (!selText) {
            selText = sampleText;
            isSample = true;
        } else if (selText.charAt(selText.length - 1) == " ") {
            selText = selText.substring(0, selText.length - 1);
            tagClose += " ";
        }
    }

}

function checkSelectedText() {
    if (!selText) {
        selText = sampleText;
        isSample = true;
    } else if (selText.charAt(selText.length - 1) == " ") {
        selText = selText.substring(0, selText.length - 1);
        tagClose += " ";
    }
}