/***** BEGIN LICENSE BLOCK ***** {{{
Version: MPL 1.1/GPL 2.0/LGPL 2.1

The contents of this file are subject to the Mozilla Public License Version
1.1 (the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the
License.

Copyright (c) 2006-2009 by Martin Stubenschrott <stubenschrott@vimperator.org>

Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
}}} ***** END LICENSE BLOCK *****/

/** @scope modules */

const template = {
    add: function add(a, b) a + b,
    join: function join(c) function (a, b) a + c + b,

    map: function map(iter, fn, sep, interruptable)
    {
        if (iter.length) // FIXME: Kludge?
            iter = util.Array.iterator(iter);
        let ret = <></>;
        let n = 0;
        for each (let i in Iterator(iter))
        {
            let val = fn(i);
            if (val == undefined)
                continue;
            if (sep && n++)
                ret += sep;
            if (interruptable && n % interruptable == 0)
                liberator.threadYield(true, true);
            ret += val;
        }
        return ret;
    },

    maybeXML: function maybeXML(xml)
    {
        if (typeof xml == "xml")
            return xml;
        try
        {
            return new XMLList(xml);
        }
        catch (e) {}
        return <>{xml}</>;
    },

    completionRow: function completionRow(item, class)
    {
        if (typeof icon == "function")
            icon = icon();

        if (class)
        {
            var text = item[0] || "";
            var desc = item[1] || "";
        }
        else
        {
            var text = this.process[0].call(this, item, item.text);
            var desc = this.process[1].call(this, item, item.description);
        }

        // <e4x>
        return <div highlight={class || "CompItem"} style="white-space: nowrap">
                   <!-- The non-breaking spaces prevent empty elements
                      - from pushing the baseline down and enlarging
                      - the row.
                      -->
                   <li highlight="CompResult">{text}&#160;</li>
                   <li highlight="CompDesc">{desc}&#160;</li>
               </div>;
        // </e4x>
    },

    bookmarkDescription: function (item, text)
    <>
        <a href={item.item.url} highlight="URL">{text}</a>&#160;
        {
            !(item.extra && item.extra.length) ? "" :
            <span class="extra-info">
                ({
                    template.map(item.extra, function (e)
                    <>{e[0]}: <span highlight={e[2]}>{e[1]}</span></>,
                    <>&#xa0;</>/* Non-breaking space */)
                })
            </span>
        }
    </> ,

    icon: function (item, text)
    {
        return <><span highlight="CompIcon">{item.icon ? <img src={item.icon}/> : <></>}</span><span class="td-strut"/>{text}</>
    },

    filter: function (str) <span highlight="Filter">{str}</span>,

    gradient: function (left, right)
        <div highlight="Gradient">
            <div style="height: 0px">
                <div highlight={right + " Gradient"}
                     style="border: 0 !important; margin: 0 !important; padding: 0 !important;"/>
            </div>
            <table width="100%" style="height: 100%">
                <tr>
                    { template.map(util.range(0, 100), function (i)
                      <td highlight={left} style={"opacity: " + (1 - i / 100)}/>) }
                </tr>
            </table>
        </div>,

    // if "processStrings" is true, any passed strings will be surrounded by " and
    // any line breaks are displayed as \n
    highlight: function highlight(arg, processStrings, clip)
    {
        // some objects like window.JSON or getBrowsers()._browsers need the try/catch
        try
        {
            let str = clip ? util.clip(String(arg), clip) : String(arg);
            switch (arg == null ? "undefined" : typeof arg)
            {
                case "number":
                    return <span highlight="Number">{str}</span>;
                case "string":
                    if (processStrings)
                        str = str.quote();
                    return <span highlight="String">{str}</span>;
                case "boolean":
                    return <span highlight="Boolean">{str}</span>;
                case "function":
                    // Vim generally doesn't like /foo*/, because */ looks like a comment terminator.
                    // Using /foo*(:?)/ instead.
                    if (processStrings)
                        return <span highlight="Function">{str.replace(/\{(.|\n)*(?:)/g, "{ ... }")}</span>;
                    return <>{arg}</>;
                case "undefined":
                    return <span highlight="Null">{arg}</span>;
                case "object":
                    // for java packages value.toString() would crash so badly
                    // that we cannot even try/catch it
                    if (/^\[JavaPackage.*\]$/.test(arg))
                        return <>[JavaPackage]</>;
                    if (processStrings && false)
                        str = template.highlightFilter(str, "\n", function () <span highlight="NonText">^J</span>);
                    return <span highlight="Object">{str}</span>;
                case "xml":
                    return arg;
                default:
                    return <![CDATA[<unknown type>]]>;
            }
        }
        catch (e)
        {
            return<![CDATA[<unknown>]]>;
        }
    },

    highlightFilter: function highlightFilter(str, filter, highlight)
    {
        return this.highlightSubstrings(str, (function ()
        {
            if (filter.length == 0)
                return;
            let lcstr = String.toLowerCase(str);
            let lcfilter = filter.toLowerCase();
            let start = 0;
            while ((start = lcstr.indexOf(lcfilter, start)) > -1)
            {
                yield [start, filter.length];
                start += filter.length;
            }
        })(), highlight || template.filter);
    },

    highlightRegexp: function highlightRegexp(str, re, highlight)
    {
        return this.highlightSubstrings(str, (function ()
        {
            let res;
            while ((res = re.exec(str)) && res[0].length)
                yield [res.index, res[0].length];
        })(), highlight || template.filter);
    },

    highlightSubstrings: function highlightSubstrings(str, iter, highlight)
    {
        if (typeof str == "xml")
            return str;
        if (str == "")
            return <>{str}</>;

        str = String(str).replace(" ", "\u00a0");
        let s = <></>;
        let start = 0;
        let n = 0;
        for (let [i, length] in iter)
        {
            if (n++ > 50) // Prevent infinite loops.
                return s + <>{str.substr(start)}</>;
            XML.ignoreWhitespace = false;
            s += <>{str.substring(start, i)}</>;
            s += highlight(str.substr(i, length));
            start = i + length;
        }
        return s + <>{str.substr(start)}</>;
    },

    // FIXME: why is href="#"?
    highlightURL: function highlightURL(str, force)
    {
        if (force || /^[a-zA-Z]+:\/\//.test(str))
            return <a highlight="URL" href="#">{str}</a>;
        else
            return str;
    },

    commandOutput: function generic(xml)
    {
        return <>:{commandline.command}<br/>{xml}</>;
    },

    // every item must have a .xml property which defines how to draw itself
    // @param headers is an array of strings, the text for the header columns
    genericTable: function genericTable(items, format)
    {
        completion.listCompleter(function (context) {
            context.filterFunc = null;
            if (format)
                context.format = format;
            context.completions = items;
        });
    },

    jumps: function jumps(index, elems)
    {
        // <e4x>
        return this.commandOutput(
            <table>
                <tr style="text-align: left;" highlight="Title">
                    <th colspan="2">jump</th><th>title</th><th>URI</th>
                </tr>
                {
                    this.map(Iterator(elems), function ([idx, val])
                    <tr>
                        <td class="indicator">{idx == index ? ">" : ""}</td>
                        <td>{Math.abs(idx - index)}</td>
                        <td style="width: 250px; max-width: 500px; overflow: hidden;">{val.title}</td>
                        <td><a href={val.URI.spec} highlight="URL jump-list">{val.URI.spec}</a></td>
                    </tr>)
                }
            </table>);
        // </e4x>
    },

    options: function options(title, opts)
    {
        // <e4x>
        return this.commandOutput(
            <table>
                <tr highlight="Title" align="left">
                    <th>--- {title} ---</th>
                </tr>
                {
                    this.map(opts, function (opt)
                    <tr>
                        <td>
                            <span style={opt.isDefault ? "" : "font-weight: bold"}>{opt.pre}{opt.name}</span><span>{opt.value}</span>
                            {opt.isDefault || opt.default == null ? "" : <span class="extra-info"> (default: {opt.default})</span>}
                        </td>
                    </tr>)
                }
            </table>);
        // </e4x>
    },

    table: function table(title, data, indent)
    {
        let table =
        // <e4x>
            <table>
                <tr highlight="Title" align="left">
                    <th colspan="2">{title}</th>
                </tr>
                {
                    this.map(data, function (datum)
                    <tr>
                       <td style={"font-weight: bold; min-width: 150px; padding-left: " + (indent || "2ex")}>{datum[0]}</td>
                       <td>{template.maybeXML(datum[1])}</td>
                    </tr>)
                }
            </table>;
        // </e4x>
        if (table.tr.length() > 1)
            return table;
    },

    tabular: function tabular(headings, style, iter)
    {
        // TODO: This might be mind-bogglingly slow. We'll see.
        // <e4x>
        return this.commandOutput(
            <table>
                <tr highlight="Title" align="left">
                {
                    this.map(headings, function (h)
                    <th>{h}</th>)
                }
                </tr>
                {
                    this.map(iter, function (row)
                    <tr>
                    {
                        template.map(Iterator(row), function ([i, d])
                        <td style={style[i] || ""}>{d}</td>)
                    }
                    </tr>)
                }
            </table>);
        // </e4x>
    },

    usage: function usage(iter)
    {
        // <e4x>
        return this.commandOutput(
            <table>
            {
                this.map(iter, function (item)
                <tr>
                    <td highlight="Title" style="padding-right: 20px">{item.name || item.names[0]}</td>
                    <td>{item.description}</td>
                </tr>)
            }
            </table>);
        // </e4x>
    }
};

// vim: set fdm=marker sw=4 ts=4 et: