<?php
    /**
     * File: admin.js.php
     * JavaScript for core functionality and extensions.
     */
    if (!defined('CHYRP_VERSION'))
        exit;
?>
'use strict';

$(function() {
    toggle_all();
    validate_slug();
    validate_email();
    validate_url();
    validate_passwords();
    confirm_submit();
    solo_submit();
    test_uploads();
    Help.init();
    Write.init();
    Settings.init();
});
// Adds a master toggle to forms that have multiple checkboxes.
function toggle_all() {
    $("form[data-toggler]").each(
        function() {
            var all_on = true;
            var target = $(this);
            var parent = $("#" + $(this).attr("data-toggler"));
            var slaves = target.find(":checkbox");
            var master = Date.now().toString(16);

            slaves.each(
                function() {
                    return all_on = $(this).prop("checked");
                }
            );

            slaves.click(
                function(e) {
                    slaves.each(
                        function() {
                            return all_on = $(this).prop("checked");
                        }
                    );

                    $("#" + master).prop("checked", all_on);
                }
            );

            parent.append(
                [$("<label>", {
                    "for": master
                }).text('<?php esce(__("Toggle All", "admin")); ?>'),
                $("<input>", {
                    "type": "checkbox",
                    "name": "toggle",
                    "id": master,
                    "class": "checkbox",
                    "aria-label": '<?php esce(__("Toggle All", "admin")); ?>'
                }).prop("checked", all_on).click(
                    function(e) {
                        slaves.prop("checked", $(this).prop("checked"));
                    }
                )]
            );
        }
    );
}
// Validates slug fields.
function validate_slug() {
    $("input[name='slug']").keyup(
        function(e) {
            var slug = $(this).val();

            if (/^([a-z0-9\-]*)$/.test(slug))
                $(this).removeClass("error");
            else
                $(this).addClass("error");
        }
    );
}
// Validates email fields.
function validate_email() {
    $("input[type='email']").keyup(
        function(e) {
            var text = $(this).val();

            if (text != "" && !isEmail(text))
                $(this).addClass("error");
            else
                $(this).removeClass("error");
        }
    );
}
// Validates URL fields.
function validate_url() {
    $("input[type='url']").keyup(
        function(e) {
            var text = $(this).val();

            if (text != "" && !isURL(text))
                $(this).addClass("error");
            else
                $(this).removeClass("error");
        }
    );

    $("input[type='url']").on(
        "change",
        function(e) {
            var text = $(this).val();

            if (isURL(text))
                $(this).val(addScheme(text));
        }
    );
}
// Tests the strength of #password1 and compares #password1 to #password2.
function validate_passwords() {
    var passwords = $("input[type='password']").filter(
        function(index) {
            var id = $(this).attr("id");
            return (!!id) ? id.match(/password[1-2]$/) : false ;
        }
    );

    passwords.first().keyup(
        function(e) {
            var password = $(this).val();

            if (passwordStrength(password) > 99)
                $(this).addClass("strong");
            else
                $(this).removeClass("strong");
        }
    );

    passwords.keyup(
        function(e) {
            var password1 = passwords.first().val();
            var password2 = passwords.last().val();

            if (password1 != "" && password1 != password2)
                passwords.last().addClass("error");
            else
                passwords.last().removeClass("error");
        }
    );

    passwords.parents("form").on(
        "submit.passwords",
        function(e) {
            var password1 = passwords.first().val();
            var password2 = passwords.last().val();

            if (password1 != password2) {
                e.preventDefault();
                alert('<?php esce(__("Passwords do not match.")); ?>');
            }
        }
    );
}
// Asks the user to confirm form submission.
function confirm_submit() {
    $("form[data-confirm]").on(
        "submit.confirm",
        function(e) {
            var text = $(this).attr("data-confirm") ||
                       '<?php esce(__("Are you sure you want to proceed?", "admin")); ?>' ;

            if (!confirm(text.replace(/<[^>]+>/g, "")))
                e.preventDefault();
        }
    );

    $("button[data-confirm]").on(
        "click.confirm",
        function(e) {
            var text = $(this).attr("data-confirm") ||
                       '<?php esce(__("Are you sure you want to proceed?", "admin")); ?>' ;

            if (!confirm(text.replace(/<[^>]+>/g, "")))
                e.preventDefault();
        }
    );
}
// Prevents forms being submitted multiple times in a short interval.
function solo_submit() {
    $("form").on(
        "submit.solo",
        function(e) {
            var last = $(this).attr("data-submitted") || 0 ;
            var when = Date.now();

            if ((when - last) < 5000) {
                e.preventDefault();
                console.log("Form submission blocked for 5 secs.");
            } else {
                $(this).attr("data-submitted", when);
            }
        }
    );
}
function test_uploads() {
    $("input[type='file']:not(.toolbar)").on(
        "change.uploads",
        function(e) {
            if (!!e.target.files && e.target.files.length > 0) {
                for (var i = 0; i < e.target.files.length; i++) {
                    var file = e.target.files[i];

                    if (file.size > Uploads.limit) {
                        e.target.value = null;
                        alert(Uploads.message);
                        break;
                    }
                }
            }
        }
    );
}
var Route = {
    action: '<?php esce($route->action); ?>',
    request: '<?php esce($route->request); ?>'
}
var Visitor = {
    id: <?php esce($visitor->id); ?>,
    token: '<?php esce(authenticate()); ?>'
}
var Site = {
    url: '<?php esce($config->url); ?>',
    chyrp_url: '<?php esce($config->chyrp_url); ?>',
    ajax_url: '<?php esce(unfix(url('/', 'AjaxController'))); ?>'
}
var Oops = {
    message: '<?php esce(__("Oops! Something went wrong on this web page.")); ?>',
    count: 0
}
var Uploads = {
    limit: <?php esce(intval($config->uploads_limit * 1000000)); ?>,
    message: '<?php esce(_f("Maximum file size: %d Megabytes!", $config->uploads_limit)); ?>',
    active: 0,
    send: function(file, doneCallback, failCallback, alwaysCallback) {
        Uploads.active++;
        var form = new FormData();

        form.set("action", "file_upload");
        form.set("hash", Visitor.token);
        form.set("file", file, file.name);

        $.ajax({
            type: "POST",
            url: Site.ajax_url,
            data: form,
            processData: false,
            contentType: false,
            dataType: "json",
        }).done(
            function(response) {
                doneCallback(response);
            }
        ).fail(
            function(response) {
                Oops.count++;
                failCallback(response);
            }
        ).always(
            function(response) {
                Uploads.active--;
                alwaysCallback(response);
            }
        );
    },
    show: function(search, filter, clickCallback, failCallback, alwaysCallback) {
        if (Uploads.active)
            return;

        Uploads.active++;

        $.post(
            Site.ajax_url,
            {
                action: "uploads_modal",
                hash: Visitor.token,
                search: search,
                filter: filter
            },
            function(data) {
                $(
                    "<div>",
                    {
                        "role": "dialog",
                        "aria-label": '<?php esce(__("Modal window", "admin")); ?>'
                    }
                ).addClass(
                    "iframe_background"
                ).append(
                    [
                        $(
                            "<div>",
                            {
                                "title": '<?php esce(__("Uploads", "admin")); ?>',
                            }
                        ).addClass(
                            "iframe_foreground"
                        ).on(
                            "click",
                            "a",
                            function(e) {
                                e.preventDefault();
                                var target = $(e.target);
                                var file = {
                                    href: target.attr("href"),
                                    name: target.attr("data-name"),
                                    type: target.attr("data-type"),
                                    size: Number(target.attr("data-size"))
                                };
                                clickCallback(file);
                                $(this).parents(".iframe_background").remove();
                            }
                        ).append(data),
                        $(
                            "<a>",
                            {
                                "href": "#",
                                "role": "button",
                                "accesskey": "x",
                                "aria-label": '<?php esce(__("Close", "admin")); ?>'
                            }
                        ).addClass(
                            "iframe_close_gadget"
                        ).click(
                            function(e) {
                                e.preventDefault();
                                $(this).parent().remove();
                            }
                        ).append(
                            $(
                                "<img>",
                                {
                                    "src": Site.chyrp_url + '/admin/images/icons/close.svg',
                                    "alt": '<?php esce(__("close", "admin")); ?>'
                                }
                            )
                        )
                    ]
                ).click(
                    function(e) {
                        if (e.target === e.currentTarget)
                            $(this).remove();
                    }
                ).insertAfter("#content").children("a.iframe_close_gadget").focus();
            },
            "html"
        ).fail(
            function(response) {
                Oops.count++;
                failCallback(response);
            }
        ).always(
            function(response) {
                Uploads.active--;
                alwaysCallback(response);
            }
        );
    }
}
var Help = {
    init: function() {
        $(".help").on(
            "click",
            function(e) {
                e.preventDefault();
                Help.show($(this).attr("href"));
            }
        );
    },
    show: function(href) {
        $("<div>", {
            "role": "dialog",
            "aria-label": '<?php esce(__("Modal window", "admin")); ?>'
        }).addClass(
            "iframe_background"
        ).append(
            [
                $(
                    "<iframe>",
                    {
                        "src": href,
                        "title": '<?php esce(__("Help content", "admin")); ?>',
                        "sandbox": "allow-same-origin allow-popups allow-popups-to-escape-sandbox"
                    }
                ).addClass(
                    "iframe_foreground"
                ).loader().on(
                    "load",
                    function() {
                        $(this).loader(true);
                    }
                ),
                $(
                    "<a>",
                    {
                        "href": "#",
                        "role": "button",
                        "accesskey": "x",
                        "aria-label": '<?php esce(__("Close", "admin")); ?>'
                    }
                ).addClass(
                    "iframe_close_gadget"
                ).click(
                    function(e) {
                        e.preventDefault();
                        $(this).parent().remove();
                    }
                ).append(
                    $(
                        "<img>",
                        {
                            "src": Site.chyrp_url + '/admin/images/icons/close.svg',
                            "alt": '<?php esce(__("close", "admin")); ?>'
                        }
                    )
                )
            ]
        ).click(
            function(e) {
                if (e.target === e.currentTarget)
                    $(this).remove();
            }
        ).insertAfter("#content").children("a.iframe_close_gadget").focus();
    }
}
var Write = {
    init: function() {
        // Insert toolbar buttons for text formatting.
        $("#write_form .options_toolbar, #edit_form .options_toolbar").each(
            function() {
                var toolbar = $(this);
                var target = $("#" + toolbar.attr("id").replace("_toolbar", ""));
                var tray = $("#" + target.attr("id") + "_tray");

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Heading", "admin")); ?>',
                            "aria-label": '<?php esce(__("Heading", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "h3");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/heading.svg',
                                "alt": '<?php esce(__("heading", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Strong", "admin")); ?>',
                            "aria-label": '<?php esce(__("Strong", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "strong");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/bold.svg',
                                "alt": '<?php esce(__("strong", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Emphasis", "admin")); ?>',
                            "aria-label": '<?php esce(__("Emphasis", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "em");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/italic.svg',
                                "alt": '<?php esce(__("emphasis", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Strikethrough", "admin")); ?>',
                            "aria-label": '<?php esce(__("Strikethrough", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "del");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/strikethrough.svg',
                                "alt": '<?php esce(__("strikethrough", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Highlight", "admin")); ?>',
                            "aria-label": '<?php esce(__("Highlight", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "mark");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/highlight.svg',
                                "alt": '<?php esce(__("highlight", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Code", "admin")); ?>',
                            "aria-label": '<?php esce(__("Code", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "code");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/code.svg',
                                "alt": '<?php esce(__("code", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Hyperlink", "admin")); ?>',
                            "aria-label": '<?php esce(__("Hyperlink", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "hyperlink");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/link.svg',
                                "alt": '<?php esce(__("hyperlink", "admin")); ?>'
                            }
                        )
                    )
                );

                toolbar.append(
                    $(
                        "<button>",
                        {
                            "type": "button",
                            "title": '<?php esce(__("Image", "admin")); ?>',
                            "aria-label": '<?php esce(__("Image", "admin")); ?>'
                        }
                    ).addClass(
                        "emblem toolbar"
                    ).click(
                        function(e) {
                            Write.formatting(target, "img");
                        }
                    ).append(
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/image.svg',
                                "alt": '<?php esce(__("image", "admin")); ?>'
                            }
                        )
                    )
                );

                // Do not continue if the textarea has <data-no_uploads>.
                if (typeof target.attr("data-no_uploads") !== "undefined")
                    return;

                // Insert toolbar buttons for image uploads.
                $(
                    "<label>",
                    {
                        "role": "button",
                        "title": '<?php esce(__("Upload", "admin")); ?>',
                        "aria-label": '<?php esce(__("Upload", "admin")); ?>'
                    }
                ).addClass(
                    "emblem toolbar"
                ).append(
                    [
                        $(
                            "<input>",
                            {
                                "name": toolbar.attr("id") + "_upload",
                                "type": "file",
                                "accept": "image/*"
                            }
                        ).addClass(
                            "toolbar hidden"
                        ).change(
                            function(e) {
                                if (!!e.target.files && e.target.files.length > 0) {
                                    var file = e.target.files[0];

                                    // Reject files too large to upload.
                                    if (file.size > Uploads.limit) {
                                        e.target.value = null;
                                        tray.html(Uploads.message);
                                        return;
                                    }

                                    tray.loader().html('<?php esce(__("Uploading...", "admin")); ?>');

                                    // Upload the file and insert the tag if successful.
                                    Uploads.send(
                                        file,
                                        function(response) {
                                            Write.formatting(target, "img", response.data.url);
                                        },
                                        function(response) {
                                            tray.html(Oops.message);
                                        },
                                        function(response) {
                                            tray.loader(true);
                                            e.target.value = null;
                                        }
                                    );
                                }
                            }
                        ),
                        $(
                            "<img>",
                            {
                                "src": Site.chyrp_url + '/admin/images/icons/upload.svg',
                                "alt": '<?php esce(__("image", "admin")); ?>'
                            }
                        )
                    ]
                ).appendTo(toolbar);

                // Insert button to open the uploads modal.
                if (<?php esce($visitor->group->can("edit_post", "edit_page", true)); ?>) {
                    toolbar.append(
                        $(
                            "<button>",
                            {
                                "type": "button",
                                "title": '<?php esce(__("Insert", "admin")); ?>',
                                "aria-label": '<?php esce(__("Insert", "admin")); ?>'
                            }
                        ).addClass(
                            "emblem toolbar"
                        ).click(
                            function(e) {
                                tray.loader();

                                var search = target.attr("data-uploads_search") || "" ;
                                var filter = target.attr("data-uploads_filter") || "" ;

                                Uploads.show(
                                    search,
                                    filter,
                                    function(file) {
                                        Write.formatting(target, "insert", file.href);
                                    },
                                    function(response) {
                                        tray.html(Oops.message);
                                    },
                                    function(response) {
                                        tray.loader(true);
                                    }
                                );
                            }
                        ).append(
                            $("<img>", {
                                "src": Site.chyrp_url + '/admin/images/icons/storage.svg',
                                "alt": '<?php esce(__("insert", "admin")); ?>'
                            })
                        )
                    );
                }
            }
        );

        // Insert buttons for ajax previews.
        if (<?php esce($theme->file_exists("content".DIR."preview")); ?>) {
            $("#write_form *[data-preview], #edit_form *[data-preview]").each(
                function() {
                    var target = $(this);

                    $("#" + target.attr("id") + "_toolbar").append(
                        $(
                            "<button>",
                            {
                                "type": "button",
                                "title": '<?php esce(__("Preview", "admin")); ?>',
                                "aria-label": '<?php esce(__("Preview", "admin")); ?>'
                            }
                        ).addClass(
                            "emblem toolbar"
                        ).click(
                            function(e) {
                                var content  = target.val();
                                var field    = target.attr("name");
                                var safename = $("input#feather").val() || "page";
                                var action   = (safename == "page") ?
                                    "preview_page" :
                                    "preview_post" ;

                                e.preventDefault();

                                if (content != "")
                                    Write.show(action, safename, field, content);
                                else
                                    target.focus();
                            }
                        ).append(
                            $(
                                "<img>",
                                {
                                    "src": Site.chyrp_url + '/admin/images/icons/view.svg',
                                    "alt": '<?php esce(__("preview", "admin")); ?>'
                                }
                            )
                        )
                    );
                }
            );
        }

        // Support drag-and-drop image uploads.
        $("#write_form textarea, #edit_form textarea").each(
            function() {
                var target = $(this);

                // Do not continue if the textarea has <data-no_uploads>.
                if (typeof target.attr("data-no_uploads") !== "undefined")
                    return;

                target.on("dragover", Write.dragover).
                       on("dragenter", Write.dragenter).
                       on("dragleave", Write.dragleave).
                       on("drop", Write.drop);
            }
        );

        // Add a word counter to textarea elements.
        $("#write_form textarea, #edit_form textarea").each(
            function() {
                var target = $(this);

                var tray = $("#" + target.attr("id") + "_tray");
                var regex = /\p{White_Space}+/gu;
                var label = '<?php esce(__("Words:", "admin")); ?>';

                target.on(
                    "input",
                    function(e) {
                        var words = target.val();
                        var count = words.trim().match(regex);
                        var total = !!count ? count.length + 1 : 1 ;

                        if (total == 1 && words.match(/^\p{White_Space}*$/gu))
                            total = 0;

                        tray.html(label + " " + total);
                    }
                );

                target.trigger("input");
            }
        );

        // Remember unsaved text entered in the primary text input and textarea.
        if (!!sessionStorage) {
            var prefix = "user_" + Visitor.id;

            $("#write_form .main_options input[type='text']").first().val(
                function() {
                    try {
                        return sessionStorage.getItem(prefix + "_write_title");
                    } catch(e) {
                        console.log("Caught Exception: Window.sessionStorage.getItem()");
                        return null;
                    }
                }
            ).on(
                "change",
                function(e) {
                    try {
                        sessionStorage.setItem(prefix + "_write_title", $(this).val());
                    } catch(e) {
                        console.log("Caught Exception: Window.sessionStorage.setItem()");
                    }
                }
            );

            $("#write_form .main_options textarea").first().val(
                function(index, value) {
                    try {
                        return sessionStorage.getItem(prefix + "_write_body");
                    } catch(e) {
                        console.log("Caught Exception: Window.sessionStorage.getItem()");
                        return null;
                    }
                }
            ).on(
                "change",
                function(e) {
                    try {
                        sessionStorage.setItem(prefix + "_write_body", $(this).val());
                    } catch(e) {
                        console.log("Caught Exception: Window.sessionStorage.setItem()");
                    }
                }
            );

            $("#write_form").on(
                "submit.sessionStorage",
                function(e) {
                    try {
                        sessionStorage.removeItem(prefix + "_write_title");
                        sessionStorage.removeItem(prefix + "_write_body");
                    } catch(e) {
                        console.log("Caught Exception: Window.sessionStorage.removeItem()");
                    }
                }
            );
        }
    },
    dragenter: function(e) {
        $(e.target).addClass("drag_highlight");
    },
    dragleave: function(e) {
        $(e.target).removeClass("drag_highlight");
    },
    dragover: function(e) {
        e.preventDefault();
    },
    drop: function(e) {
        // Process drag-and-drop image file uploads.
        e.stopPropagation();
        e.preventDefault();
        var dt = e.originalEvent.dataTransfer;

        if (!!dt && !!dt.files && dt.files.length > 0) {
            var file = dt.files[0];
            var form = new FormData();
            var tray = $("#" + $(e.target).attr("id") + "_tray");

            if (file.type.indexOf("image/") == 0) {
                // Reject files too large to upload.
                if (file.size > Uploads.limit) {
                    tray.html(Uploads.message);
                    return;
                }

                tray.loader().html('<?php esce(__("Uploading...", "admin")); ?>');

                // Upload the file and insert the tag if successful.
                Uploads.send(
                    file,
                    function(response) {
                        Write.formatting($(e.target), "img", response.data.url);
                    },
                    function(response) {
                        tray.html(Oops.message);
                    },
                    function(response) {
                        tray.loader(true);
                        $(e.target).removeClass("drag_highlight");
                    }
                );
            }
        }
    },
    formatting: function(target, effect, fragment = "") {
        var markdown = <?php esce($config->enable_markdown); ?>;
        var opening = "";
        var closing = "";
        var after = "";
        var start = target[0].selectionStart;
        var end = target[0].selectionEnd;
        var selection = target.val().substring(start, end);

        // Test for a trailing space caused by double-click word selection.
        if (selection.length > 0) {
            if (selection.slice(-1) == " ") {
                after = " ";
                selection = selection.substring(0, selection.length - 1);
            }
        }

        switch (effect) {
            case 'strong':
                opening = (markdown) ?
                    "**" :
                    '<strong>' ;

                closing = (markdown) ?
                    "**" :
                    '</strong>' ;

                if (selection == "")
                    selection = " ";

                break;

            case 'em':
                opening = (markdown) ?
                    "*" :
                    '<em>' ;

                closing = (markdown) ?
                    "*" :
                    '</em>' ;

                if (selection == "")
                    selection = " ";

                break;

            case 'code':
                opening = (markdown) ?
                    "`" :
                    '<code>' ;

                closing = (markdown) ?
                    "`" :
                    '</code>' ;

                if (selection == "")
                    selection = " ";

                break;

            case 'h3':
                opening = (markdown) ?
                    "### " :
                    '<h3>' ;

                closing = (markdown) ?
                    "" :
                    '</h3>' ;

                break;

            case 'del':
                opening = (markdown) ?
                    "~~" :
                    '<del>' ;

                closing = (markdown) ?
                    "~~" :
                    '</del>' ;

                if (selection == "")
                    selection = " ";

                break;

            case 'mark':
                opening = (markdown) ?
                    "==" :
                    '<mark>' ;

                closing = (markdown) ?
                    "==" :
                    '</mark>' ;

                if (selection == "")
                    selection = " ";

                break;

            case 'hyperlink':
                if (isURL(selection)) {
                    if (fragment) {
                        selection = fragment;
                        break;
                    }

                    opening = (markdown) ?
                        "[](" :
                        '<a href="' ;

                    closing = (markdown) ?
                        ")" :
                        '"></a>' ;
                } else {
                    opening = (markdown) ?
                        "[" :
                        '<a href="' + fragment + '">' ;

                    closing = (markdown) ?
                        "](" + fragment + ")" :
                        '</a>' ;
                }

                break;

            case 'img':
                if (isURL(selection)) {
                    if (fragment) {
                        selection = fragment;
                        break;
                    }

                    opening = (markdown) ?
                        "![](" :
                        '<img alt="" src="' ;

                    closing = (markdown) ?
                        ")" :
                        '">' ;
                } else {
                    opening = (markdown) ?
                        "![" :
                        '<img alt="' ;

                    closing = (markdown) ?
                        "](" + fragment + ")" :
                        '" src="' + fragment + '">' ;
                }

                break;

            case 'insert':
                selection = fragment;
                break;
        }

        var text = opening + selection + closing + after;
        target[0].setRangeText(text);
        $(target).focus().trigger("input").trigger("change");
    },
    show: function(action, safename, field, content) {
        var uid = Date.now().toString(16);

        // Build a form targeting a named iframe.
        $(
            "<form>",
            {
                "id": uid,
                "action": Site.ajax_url,
                "method": "post",
                "accept-charset": "UTF-8",
                "target": uid,
                "style": "display: none;"
            }
        ).append(
            [
                $(
                    "<input>",
                    {
                        "type": "hidden",
                        "name": "action",
                        "value": action
                    }
                ),
                $(
                    "<input>",
                    {
                        "type": "hidden",
                        "name": "safename",
                        "value": safename
                    }
                ),
                $(
                    "<input>",
                    {
                        "type": "hidden",
                        "name": "field",
                        "value": field
                    }
                ),
                $(
                    "<input>",
                    {
                        "type": "hidden",
                        "name": "content",
                        "value": content
                    }
                ),
                $(
                    "<input>",
                    {
                        "type": "hidden",
                        "name": "hash",
                        "value": Visitor.token
                    }
                )
            ]
        ).insertAfter("#content");

        // Build and display the named iframe.
        $(
            "<div>",
            {
                "role": "dialog",
                "aria-label": '<?php esce(__("Modal window", "admin")); ?>'
            }
        ).addClass(
            "iframe_background"
        ).append(
            [
                $(
                    "<iframe>",
                    {
                        "name": uid,
                        "title": '<?php esce(__("Preview content", "admin")); ?>',
                        "sandbox": "allow-same-origin allow-popups allow-popups-to-escape-sandbox"
                    }
                ).addClass(
                    "iframe_foreground"
                ).loader().on(
                    "load",
                    function() {
                        if (!!this.contentWindow.location && this.contentWindow.location != "about:blank")
                            $(this).loader(true);
                    }
                ),
                $(
                    "<a>",
                    {
                        "href": "#",
                        "role": "button",
                        "accesskey": "x",
                        "aria-label": '<?php esce(__("Close", "admin")); ?>'
                    }
                ).addClass(
                    "iframe_close_gadget"
                ).click(
                    function(e) {
                        e.preventDefault();
                        $(this).parent().remove();
                    }
                ).append(
                    $(
                        "<img>",
                        {
                            "src": Site.chyrp_url + '/admin/images/icons/close.svg',
                            "alt": '<?php esce(__("close", "admin")); ?>'
                        }
                    )
                )
            ]
        ).click(
            function(e) {
                if (e.target === e.currentTarget)
                    $(this).remove();
            }
        ).insertAfter("#content").children("a.iframe_close_gadget").focus();

        // Submit the form and destroy it immediately.
        $("#" + uid).submit().remove();
    }
}
var Settings = {
    init: function() {
        $("#email_correspondence").click(
            function() {
                if ($(this).prop("checked") == false)
                    $("#email_activation").prop("checked", false);
            }
        );

        $("#email_activation").click(
            function() {
                if ($(this).prop("checked") == true)
                    $("#email_correspondence").prop("checked", true);
            }
        );

        $("form#route_settings input[name='post_url']").on(
            "keyup",
            function(e) {
                $("form#route_settings code.syntax").each(
                    function() {
                        var syntax = $(this).html();
                        var regexp = new RegExp("(/?|^)" + escapeRegExp(syntax) + "(/?|$)", "g");

                        if ($(e.target).val().match(regexp))
                            $(this).addClass("tag_added");
                        else
                            $(this).removeClass("tag_added");
                    }
                );
            }
        ).trigger("keyup");
    }
}
<?php $trigger->call("admin_javascript"); ?>