plone.app.discussion/plone/app/discussion/browser/javascripts/comments.js

/******************************************************************************
 *
 * jQuery functions for the plone.app.discussion comment viewlet and form.
 *
 ******************************************************************************/
(function ($) {
    // This unnamed function allows us to use $ inside of a block of code
    // without permanently overwriting $.
    // http://docs.jquery.com/Using_jQuery_with_Other_Libraries
    /**************************************************************************
     * Create a reply-to-comment form right beneath the form that is passed to
     * the function. We do this by copying the regular comment form and
     * adding a hidden in_reply_to field to the form.
     **************************************************************************/
    $.createReplyForm = function (comment_div) {

        var comment_id = comment_div.attr("id");

        var reply_button = comment_div.find(".reply-to-comment-button");

        /* Clone the reply div at the end of the page template that contains
         * the regular comment form.
         */
        var reply_div = $("#commenting").clone(true);

        /* Remove the ReCaptcha JS code before appending the form. If not
         * removed, this causes problems
         */
        reply_div.find("#formfield-form-widgets-captcha")
                 .find("script")
                 .remove();

        /* Insert the cloned comment form right after the reply button of the
         * current comment.
         */
        reply_div.appendTo(comment_div).css("display", "none");

        /* Remove id="reply" attribute, since we use it to uniquely
           the main reply form. */
        reply_div.removeAttr("id");

        /* Hide the reply button (only hide, because we may want to show it
         * again if the user hits the cancel button).
         */
        $(reply_button).css("display", "none");

        /* Fetch the reply form inside the reply div */
        var reply_form = reply_div.find("form");

        /* Populate the hidden 'in_reply_to' field with the correct comment
           id */
        reply_form.find("input[name='form.widgets.in_reply_to']")
                  .val(comment_id);

        /* Add a remove-reply-to-comment Javascript function to remove the
           form */
        var cancel_reply_button = reply_div.find(".cancelreplytocomment");
        cancel_reply_button.attr("id", comment_id);

        /* Show the cancel buttons. */
        reply_form.find("input[name='form.buttons.cancel']")
                  .css("display", "inline");

        /* Show the reply layer with a slide down effect */
        reply_div.slideDown("slow");

        /* Show the cancel button in the reply-to-comment form */
        cancel_reply_button.css("display", "inline");
    };


    /**************************************************************************
     * Remove all error messages and field values from the form that is passed
     * to the function.
     **************************************************************************/
    $.clearForm = function (form_div) {
        form_div.find(".error").removeClass("error");
        form_div.find(".fieldErrorBox").remove();
        form_div.find("input[type='text']").attr("value", "");
        form_div.find("textarea").attr("value", "");
        /* XXX: Clean all additional form extender fields. */
    };

    //#JSCOVERAGE_IF 0

    /**************************************************************************
     * Window Load Function: Executes when complete page is fully loaded,
     * including all frames,
     **************************************************************************/
    $(window).load(function () {


        /**********************************************************************
         * If the user has hit the reply button of a reply-to-comment form
         * (form was submitted with a value for the "in_reply_to" field in the
         * request), create a reply-to-comment form right under this comment.
         **********************************************************************/
        var post_comment_div = $("#commenting");
        var in_reply_to_field =
            post_comment_div.find("input[name='form.widgets.in_reply_to']");
        if (in_reply_to_field.val() !== "") {
            var current_reply_id = "#" + in_reply_to_field.val();
            var current_reply_to_div = $(".discussion").find(current_reply_id);
            $.createReplyForm(current_reply_to_div);
            $.clearForm(post_comment_div);
        }


         /**********************************************************************
         * If the user hits the "reply" button of an existing comment, create a
         * reply form right beneath this comment.
         **********************************************************************/
        $(".reply-to-comment-button").bind("click", function (e) {
            var comment_div = $(this).parents().filter(".comment");
            $.createReplyForm(comment_div);
            $.clearForm(comment_div);
        });


        /**********************************************************************
         * If the user hits the "clear" button of an open reply-to-comment form,
         * remove the form and show the "reply" button again.
         **********************************************************************/
        $("#commenting #form-buttons-cancel").bind("click", function (e) {
            e.preventDefault();
            var reply_to_comment_button = $(this).
                                              parents().
                                              filter(".comment").
                                              find(".reply-to-comment-button");

            /* Find the reply-to-comment form and hide and remove it again. */
            $.reply_to_comment_form = $(this).parents().filter(".reply");
            $.reply_to_comment_form.slideUp("slow", function () {
                $(this).remove();
            });

            /* Show the reply-to-comment button again. */
            reply_to_comment_button.css("display", "inline");

        });


        /**********************************************************************
         * Publish a single comment.
         **********************************************************************/
        $("input[name='form.button.PublishComment']").live('click', function () {
            var trigger = this;
            var form = $(this).parents("form");
            var data = $(form).serialize();
            var form_url = $(form).attr("action");
            $.ajax({
                type: "GET",
                url: form_url,
                data: data,
                context: trigger,
                success: function (msg) {
                    // remove button (trigger object can't be directly removed)
                    form.find("input[name='form.button.PublishComment']").remove();
                    form.parents(".state-pending").toggleClass('state-pending').toggleClass('state-published');
                },
                error: function (msg) {
                    return true;
                }
            });
            return false;
        });


        /**********************************************************************
         * Delete a comment and its answers.
         **********************************************************************/
        $("input[name='form.button.DeleteComment']").live('click', function () {
            var trigger = this;
            var form = $(this).parents("form");
            var data = $(form).serialize();
            var form_url = $(form).attr("action");
            $.ajax({
                type: 'POST',
                url: form_url,
                data: data,
                context: $(trigger).parents(".comment"),
                success: function (data) {
                    var comment = $(this);
                    var clss = comment.attr('class');
                    // remove replies
                    var treelevel = parseInt(clss[clss.indexOf('replyTreeLevel') + 'replyTreeLevel'.length], 10);
                    // selector for all the following elements of lower level
                    var selector = ".replyTreeLevel" + treelevel;
                    for (var i = 0; i < treelevel; i++) {
                        selector += ", .replyTreeLevel" + i;
                    }
                    comment.nextUntil(selector).each(function () {
                        $(this).fadeOut('fast', function () {
                            $(this).remove();
                        });
                    });
                    // remove comment
                    $(this).fadeOut('fast', function () {
                        $(this).remove();
                    });
                },
                error: function (req, error) {
                    return true;
                }
            });
            return false;
        });


        /**********************************************************************
         * By default, hide the reply and the cancel button for the regular add
         * comment form.
         **********************************************************************/
        $(".reply").find("input[name='form.buttons.reply']")
                    .css("display", "none");
        $(".reply").find("input[name='form.buttons.cancel']")
                    .css("display", "none");


        /**********************************************************************
         * By default, show the reply button only when Javascript is enabled.
         * Otherwise hide it, since the reply functions only work with JS
         * enabled.
         **********************************************************************/
        $(".reply-to-comment-button").css("display" , "inline");

    });


    //#JSCOVERAGE_ENDIF

}(jQuery));