NAME
    Mojolicious::Plugin::BootstrapHelpers - Type less bootstrap

SYNOPSIS
        # Mojolicious
        $self->plugin('BootstrapHelpers');

        # ::Lite
        plugin 'BootstrapHelpers';

        # Meanwhile, somewhere in a template...
        %= formgroup 'Email', text_field => ['email'], large, cols => { small => [3, 9] }

        # ...that renders into
        <div class="form-group form-group-lg">
            <label class="control-label col-sm-3" for="email">Email</label>
            <div class="col-sm-9">
                <input class="form-control" id="email" name="email" type="text">
            </div>
        </div>

STATUS
    This is an unstable work in progress. Backwards compatibility is
    currently not to be expected between releases.

    Currently supported Bootstrap version: 3.2.0.

    Currently only Perl 5.20+ is supported (thanks to postderef).

DESCRIPTION
    Mojolicious::Plugin::BootstrapHelpers is a convenience plugin that
    reduces some bootstrap complexity by introducing several tag helpers
    specifically for Bootstrap 3 <http://www.getbootstrap.com/>.

    The goal is not to have tag helpers for everything, but for common use
    cases.

    All examples below (and more, see tests) is expected to work.

  How to use Bootstrap
    If you don't know what Bootstrap is, see <http://www.getbootstrap.com/>
    for possible usages.

    You might want to use Mojolicious::Plugin::Bootstrap3 in your templates.

    To get going quickly by using the official CDN you can use the following
    helpers:

        # CSS
        %= bootstrap

        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">

        # or (if you want to use the theme)
        %= bootstrap 'theme'

        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">

        # And the javascript
        %= bootstrap 'js'

        <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

        # Or just:
        %= bootstrap 'all'

        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
        <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

    It is also possible to automatically include jQuery (2.*)

        %= bootstrap 'jsq'

        <script src="//code.jquery.com/jquery-2.1.1.min.js"></script>
        <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

        %= bootstrap 'allq'

        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
        <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
        <script src="//code.jquery.com/jquery-2.1.1.min.js"></script>
        <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

  Strappings
    There are several shortcuts ("strappings") for applying context and size
    classes that automatically expands to the correct class depending on
    which tag it is applied to. For instance, if you apply the "info"
    strapping to a panel, it becomes "panel-info", but when applied to a
    button it becomes "btn-info".

    You can use them in two different ways, but internally they are the
    same. These to lines are exactly identical:

        %= button 'Push me', primary

        %= button 'Push me', __primary => 1

    For sizes, you can only use the longform ("xsmall", "small", "medium"
    and "large") no matter if you use the short strapping form or not. They
    are shortened to the Bootstrap type classes.

    The following strappings are available:

       xsmall    default     striped       caret     right
       small     primary     bordered
       medium    success     hover
       large     info        condensed
                 warning     responsive
                 danger

    Add two leading underscores if you don't want to use the short form.

    See below for usage. Important: You can't follow a short form strapping
    with a fat comma ("=>"). The fat comma auto-quotes the strapping, and
    then it breaks.

    If there is no corresponding class for the element you add the strapping
    to it is silently not applied.

  Syntax convention
    In the syntax sections below the following conventions are used:

        name            A specific string
        $name           Any string
        %name           One or more key-value pairs, written as:
                          key => 'value', key2 => 'value2'
                             or, if you use short form strappings:
                          primary, large
        $key => [...]   Both of these are array references where the ordering of strings
        key  => [...]     are significant, for example:
                          key => [ $thing, $thing2, %hash ]
        $key => {...}   Both of these are hash references where the ordering of pairs are
        key  => {...}     are insignificant, for example:
                          key => { key2 => $value, key3 => 'othervalue' }
        (...)           Anything between parenthesis is optional. The parenthesis is not part of the
                          actual syntax
        |...|           Two pipes is a reference to another specification. For instance, button toolbars contain
                          button groups that contain buttons. Using this syntax makes the important parts clearer.
                          The pipes are not part of the actual syntax.

    Ordering between two hashes that follows each other is also not
    significant.

    About %has

    The following applies to all %has hashes below:

    *   They refer to any html attributes and/or strappings to apply to the
        current element.

    *   When helpers are nested, all occurrencies are change to tag-specific
        names, such as %panel_has.

    *   This hash is always optional. It is not marked so in the definitions
        below in order to reduce clutter.

    *   Depending on context either the leading or following comma is
        optional together with the hash. It is usually obvious.

    *   Sometimes on nested helpers (such as tables in panels just below),
        %has is the only thing that can be applied to the other element. In
        this case "panel => { %panel_has }". It follows from above that in
        those cases this entire expression is *also* optional. Such cases
        are also not marked as optional in syntax definitions and are not
        mentioned in syntax description, unless they need further comment.

    From this definition:

        %= table ($title,) %table_has, panel => { %panel_has }, begin
               $body
        %  end

    Both of these are legal:

        # since both panel => { %panel_has } and %table_has are hashes, their ordering is not significant.
        %= table 'Heading Table', panel => { success }, condensed, id => 'the-table', begin
             <tr><td>A Table Cell</td></tr>
        %  end


        %= table begin
             <tr><td>A Table Cell</td></tr>
        %  end

  References
    All other "|references|" are also helpers, so "|link|" and "|item|"
    needs special mention.

   |link|
    "|link|" creates an "<a>" tag.

        |link|

    Is exactly the same as

        $link_text, [ $url ], %link_has

    $link_text

    Mandatory. The text on the link.

    $url

    Mandatory. It sets the "href" on the link. url_for is used to create the
    link.

    %link_has

    Which strappings are available varies depending on context.

   |item|
    "|item|" is used in the various submenus/dropdowns. One "|item|" creates
    one "<li>" tag.

        |item|

    Is exactly the same as

        [ |link| ]

        # or
        $header_text

        # or
        []

    So, a submenu item can be one of three things:

    1. A link, in which case you create a "|link|" in an array reference.
    2. A ".dropdown-header", in which case you give it a 'string' which then
    is turned into the text of the header.
    3. A ".divider", in which case you give it an empty array reference.

    See "Dropdowns", "Button groups" and "Navbars" for examples.

HELPERS
    Bootstrap documentation <http://getbootstrap.com/components/#badges>

  Badges
   Syntax
        %= badge $text, %has

    $text

    Mandatory. If it is "undef" no output is produced.

    Available strappings

    "right" applies ".pull-right".

   Examples
        <%= badge '3' %>

        <span class="badge">3</span></a>

        <%= badge '4', data => { custom => 'yes' }, right %>

        <span class="badge pull-right" data-custom="yes">4</span>

  Buttons
    Bootstrap documentation <http://getbootstrap.com/css/#buttons>

   Syntax
        %= button $button_text(, [$url]), %has

        %= submit_button $text, %has

    $button_text

    Mandatory. The text on the button.

    "[$url]"

    Optional array reference. It is handed off to url_for, so with it this
    is basically link_to with Bootstrap classes.

    Not available for "submit_button".

    Available strappings

    "default" "primary" "success" "info" "warning" "danger" "link" applies
    the various ".btn-*" classes.

    "large" "small" "xsmall" applies ".btn-lg" ".btn-sm" ".btn-xs"
    respectively.

    "active" "block" applies the ".active" and ".block" classes.

    "disabled" applies the ".disabled" class if the generated element is an
    "<a>". On a "<button>" it applies the "disabled="disabled"" attribute.

   Examples
        %= button 'The example 5' => large, warning

        <button class="btn btn-lg btn-warning" type="button">The example 5</button>

        %= button 'The example 1' => ['http://www.example.com/'], small

        <a class="btn btn-default btn-sm" href="http://www.example.com/">The example 1</a>

        %= submit_button 'Save 2', primary

        <button class="btn btn-primary" type="submit">Save 2</button>

  Button groups
   Syntax
    There are two different syntaxes. One for single-button groups and one
    for multi-button groups. The difference is that single-button groups
    can't change anything concerning the buttongroup (e.g. it can't be
    "justified"). If you need to do that there is nothing wrong with having
    a multi-button group with just one button.

        # multi button
        <%= buttongroup %has,
                        buttons => [
                            [ |button|,
                              (items => [ |item| ])
                            ]
                        ]
        %>

        # single button
        <%= buttongroup [ |button|,
                          (items => [ |item| ])
                        ]
        %>

    "buttons => []"

    The single-button style is a shortcut for the "buttons" array reference.
    It takes ordinary buttons, with two differences: The "items" array
    reference, and it is unnecessary to give a button with "items" a url.

        "items => [...]"

        Giving a button an "items" array reference consisting of one or many
        "|item|" creates a dropdown like submenu. Read more under "item".

   Examples
        <%= buttongroup
            buttons => [
                ['Button 1'],
                ['Button 2'],
                ['Button 3'],
            ]
        %>

        <div class="btn-group">
            <button class="btn btn-default" type="button">Button 1</button>
            <button class="btn btn-default" type="button">Button 2</button>
            <button class="btn btn-default" type="button">Button 3</button>
        </div>

        <%= buttongroup small,
            buttons => [
                ['Button 1'],
                ['Dropdown 1', caret, items => [
                    ['Item 1', ['item1'] ],
                    ['Item 2', ['item2'] ],
                    [],
                    ['Item 3', ['item3'] ],
                ] ],
                ['Button 2'],
                ['Button 3'],
            ],
        %>

        <div class="btn-group btn-group-sm">
            <button class="btn btn-default" type="button">Button 1</button>
            <div class="btn-group btn-group-sm">
                <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Dropdown 1 <span class="caret"></span>
                </button>
                <ul class="dropdown-menu">
                    <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                    <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                    <li class="divider"></li>
                    <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
                </ul>
            </div>
            <button class="btn btn-default" type="button">Button 2</button>
            <button class="btn btn-default" type="button">Button 3</button>
        </div>

        <%= buttongroup vertical,
            buttons => [
                ['Button 1'],
                ['Dropdown 1', caret, items => [
                      ['Item 1', ['item1'] ],
                      ['Item 2', ['item2'] ],
                      [],
                      ['Item 3', ['item3'] ],
                ] ],
                ['Button 2'],
                ['Button 3'],
            ],
        %>

        <div class="btn-group-vertical">
            <button class="btn btn-default" type="button">Button 1</button>
            <div class="btn-group">
                <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Dropdown 1 <span class="caret"></span>
                </button>
                <ul class="dropdown-menu">
                    <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                    <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                    <li class="divider"></li>
                    <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
                </ul>
            </div>
            <button class="btn btn-default" type="button">Button 2</button>
            <button class="btn btn-default" type="button">Button 3</button>
        </div>

        <%= buttongroup justified,
            buttons => [
                ['Link 1', ['http://www.example.com/'] ],
                ['Link 2', ['http://www.example.com/'] ],
                ['Dropup 1', caret, dropup, items => [
                    ['Item 1', ['item1'] ],
                    ['Item 2', ['item2'] ],
                    [],
                    ['Item 3', ['item3'] ],
                ] ],
            ]
        %>

        <div class="btn-group btn-group-justified">
            <a class="btn btn-default" href="http://www.example.com/">Link 1</a>
            <a class="btn btn-default" href="http://www.example.com/">Link 2</a>
            <div class="btn-group dropup">
                <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Dropup 1 <span class="caret"></span>
                </button>
                <ul class="dropdown-menu">
                    <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                    <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                    <li class="divider"></li>
                    <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
                </ul>
            </div>
        </div>

        <%= buttongroup
            buttons => [
                ['Link 1', ['http://www.example.com/'] ],
                [undef, caret, items => [
                    ['Item 1', ['item1'] ],
                    ['Item 2', ['item2'] ],
                    [],
                    ['Item 3', ['item3'] ],
                ] ],
            ]
        %>

        <div class="btn-group">
            <a class="btn btn-default" href="http://www.example.com/">Link 1</a>
            <div class="btn-group">
                <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown"><span class="caret"></span>
                </button>
                <ul class="dropdown-menu">
                    <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                    <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                    <li class="divider"></li>
                    <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
                </ul>
            </div>
        </div>

        <%= buttongroup ['Default', caret, items  => [
                            ['Item 1', ['item1'] ],
                            ['Item 2', ['item2'] ],
                            [],
                            ['Item 3', ['item3'] ],
                        ] ]
        %>

        <%= buttongroup ['Big danger', caret, large, danger, items => [
                              ['Item 1', ['item1'] ],
                              ['Item 2', ['item2'] ],
                              [],
                              ['Item 3', ['item3'] ],
                        ] ]
        %>

        <div class="btn-group">
            <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Default <span class="caret"></span>
            </button>
            <ul class="dropdown-menu">
                <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                <li class="divider"></li>
                <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
            </ul>
        </div>

        <div class="btn-group">
            <button class="btn btn-danger btn-lg dropdown-toggle" type="button" data-toggle="dropdown">Big danger <span class="caret"></span>
            </button>
            <ul class="dropdown-menu">
                <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                <li class="divider"></li>
                <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
            </ul>
        </div>

  Button toolbars
   Syntax
        <%= toolbar %toolbar_has,
                    groups => [
                        { |button_group| }
                    ]
        %>

    "groups => [ { |button_group| } ]"

    A mandatory array reference of button groups.

   Examples
        <%= toolbar id => 'my-toolbar',
                    groups => [
                        { buttons => [
                            ['Button 1'],
                            ['Button 2'],
                            ['Button 3'],
                          ],
                        },
                        { buttons => [
                            ['Button 4', primary],
                            ['Button 5'],
                            ['Button 6'],
                          ],
                        },
                    ]
        %>

        <div class="btn-toolbar" id="my-toolbar">
            <div class="btn-group">
                <button class="btn btn-default" type="button">Button 1</button>
                <button class="btn btn-default" type="button">Button 2</button>
                <button class="btn btn-default" type="button">Button 3</button>
            </div>
            <div class="btn-group">
                <button class="btn btn-primary" type="button">Button 4</button>
                <button class="btn btn-default" type="button">Button 5</button>
                <button class="btn btn-default" type="button">Button 6</button>
            </div>
        </div>

  Dropdowns
   Syntax
        <%= dropdown  %has,
                      [ |button|, items  => [ |item| ]
                      ]

    "[ |button| ]"

    Mandatory array reference. It takes an ordinary button, with two
    differences: The "items" array reference, and it is unnecessary to give
    a button with "items" a url.

        "items"

        Mandatory array reference consisting of one or many "|item|". Read
        more under "item".

    Available strappings

    "caret" adds a "<span class="caret"></span<>" element on the button.

   Examples
        <%= dropdown
             ['Dropdown 1', id => 'a_custom_id', right, items => [
                ['Item 1', ['item1'] ],
                ['Item 2', ['item2'] ],
                [],
                ['Item 3', ['item3'] ]
             ] ] %>

        <div class="dropdown">
            <button class="btn btn-default dropdown-toggle" type="button" id="a_custom_id" data-toggle="dropdown">Dropdown 1</button>
            <ul class="dropdown-menu dropdown-menu-right">
                <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                <li class="divider"></li>
                <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
            </ul>
        </div>

        <%= dropdown
             ['Dropdown 2', caret, large, primary, items => [
                ['Item 1', ['item1'], data => { attr => 2 } ],
                ['Item 2', ['item2'], disabled, data => { attr => 4 } ],
                [],
                ['Item 3', ['item3'], data => { attr => 7 } ],
                [],
                ['Item 4', ['item4'], tabindex => 4 ],
                'This is a header',
                ['Item 5', ['item5'] ],
             ] ] %>

        <div class="dropdown">
            <button class="btn btn-lg btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown 2 <span class="caret"></span></button>
            <ul class="dropdown-menu">
                <li><a class="menuitem" href="item1" tabindex="-1" data-attr="2">Item 1</a></li>
                <li class="disabled"><a class="menuitem" href="item2" tabindex="-1" data-attr="4">Item 2</a></li>
                <li class="divider"></li>
                <li><a class="menuitem" href="item3" tabindex="-1" data-attr="7">Item 3</a></li>
                <li class="divider"></li>
                <li><a class="menuitem" href="item4" tabindex="4">Item 4</a></li>
                <li class="dropdown-header">This is a header</li>
                <li><a class="menuitem" href="item5" tabindex="-1">Item 5</a></li>
            </ul>
        </div>

  Form groups
    Bootstrap documentation <http://getbootstrap.com/css/#forms>

   Syntax
        <%= formgroup ($labeltext,)
                       %formgroup_has,
                      (cols => { $size => [ $label_columns, $input_columns ], (...) })
                       $fieldtype => [
                           $input_name,
                          ($input_value,)
                           %input_has,
                      ]

        %>

        # The $labeltext can also be given in the body
        %= formgroup <as above>, begin
            $labeltext
        %  end

    $labeltext

    Optional. It is either the first argument, or placed in the body. It
    creates a "label" element before the "input".

    "cols"

    Optional. It is only used when the "form" is a ".form-horizontal". You
    can defined the widths for one or more or all of the sizes. See
    examples.

        $size

        Mandatory. It is one of "xsmall", "small", "medium" or "large".
        $size takes a two item array reference.

            $label_columns

            Mandatory. The number of columns that should be used by the
            label for that size of screen. Applies
            ".col-$size-$label_columns" on the label.

            $input_columns

            Mandatory. The number of columns that should be used by the
            input for that size of screen. Applies
            ".col-$size-$input_columns" around the input.

    $fieldtype

    Mandatory. Is one of "text_field", "password_field", "datetime_field",
    "date_field", "month_field", "time_field", "week_field", "number_field",
    "email_field", "url_field", "search_field", "tel_field", "color_field".

    There can be only one $fieldtype per "formgroup".

        $name

        Mandatory. It sets both the "id" and "name" of the input field. If
        the $name contains dashes then those are translated into underscores
        when setting the "name". If "id" exists in %input_has then that is
        used for the "id" instead.

        $input_value

        Optional. If you prefer you can set "value" in %input_has instead.
        (But don't do both for the same field.)

   Examples
        %= formgroup 'Text test 1', text_field => ['test_text']

        <div class="form-group">
            <label class="control-label" for="test_text">Text test 1</label>
            <input class="form-control" id="test_text" name="test_text" type="text" />
        </div>

        %= formgroup 'Text test 4', text_field => ['test-text', large]

        <div class="form-group">
            <label class="control-label" for="test-text">Text test 4</label>
            <input class="form-control input-lg" id="test-text" name="test_text" type="text" />
        </div>

        %= formgroup 'Text test 5', text_field => ['test_text', '200' ]

        <div class="form-group">
            <label class="control-label" for="test_text">Text test 5</label>
            <input class="form-control" id="test_text" name="test_text" type="text" value="200" />
        </div>

        <form class="form-horizontal">
            %= formgroup 'Text test 6', text_field => ['test_text'], large, cols => { small => [2, 10] }
        </form>

        <form class="form-horizontal">
            <div class="form-group form-group-lg">
                <label class="control-label col-sm-2" for="test_text">Text test 6</label>
                <div class="col-sm-10">
                    <input class="form-control" id="test_text" name="test_text" type="text">
                </div>
            </div>
        </form>

        %= formgroup 'Text test 8', text_field => ['test_text'], cols => { medium => [2, 10], small => [4, 8] }

        <div class="form-group">
            <label class="control-label col-md-2 col-sm-4" for="test_text">Text test 8</label>
            <div class="col-md-10 col-sm-8">
                <input class="form-control" id="test_text" name="test_text" type="text" />
            </div>
        </div>

  Icons
    This helper needs to be activated separately, see options below.

   Syntax
        %= icon $icon_name

    $icon_name

    Mandatory. The specific icon you wish to create. Possible values depends
    on your icon pack.

   Examples
        <%= icon 'copyright-mark' %>
        %= icon 'sort-by-attributes-alt'

        <span class="glyphicon glyphicon-copyright-mark"></span>
        <span class="glyphicon glyphicon-sort-by-attributes-alt"></span>

  Input groups
   Syntax
        <%= input %has,
                  (prepend => ...,)
                  input => { |input_field| },
                  (append => ...)
        %>

    "input => { }"

    Mandatory hash reference. The content is handed off to input_tag in
    Mojolicious::Plugin::TagHelpers.

    "prepend" and "append"

    Both are optional, but input groups don't make sense if neither is
    present. They take the same arguments, but there are a few to choose
    from:

        "prepend => $string"

        "prepend => { check_box => [ |check_box| ] }"

        Creates a checkbox by giving its content to check_box in
        Mojolicious::Plugin::TagHelpers.

        "prepend => { radio_button => [ |radio_button| ] }"

        Creates a radiobutton by giving its content to radio_button in
        Mojolicious::Plugin::TagHelpers.

        "prepend => { buttongroup => { |buttongroup| }"

        Creates a single button buttongroup. See button groups for details.

        "prepend => { buttongroup => [ |buttongroup| ]"

        Creates a multi button buttongroup. See button groups for details.

   Examples
        <%= input input => { text_field => ['username'] },
                  prepend => { check_box => ['agreed'] }
        %>

        <div class="input-group">
            <span class="input-group-addon"><input name="agreed" type="checkbox" /></span>
            <input class="form-control" id="username" type="text" name="username" />
        </div>

        <%= input large,
                  prepend => { radio_button => ['yes'] },
                  input => { text_field => ['username'] },
                  append => '@'
        %>

        <div class="input-group input-group-lg">
            <span class="input-group-addon"><input name="yes" type="radio" /></span>
            <input class="form-control" id="username" type="text" name="username" />
            <span class="input-group-addon">@</span>
        </div>

        <%= input input => { text_field => ['username'] },
                  append => { button => ['Click me!'] },
        %>

        <div class="input-group">
            <input class="form-control" id="username" type="text" name="username" />
            <span class="input-group-btn"><button class="btn btn-default" type="button">Click me!</button></span>
        </div>

        <%= input input  => { text_field => ['username'] },
                  append => { buttongroup => [['The button', caret, right, items => [
                                      ['Item 1', ['item1'] ],
                                      ['Item 2', ['item2'] ],
                                      [],
                                      ['Item 3', ['item3'] ],
                                  ] ] ]
                            }
        %>

        <div class="input-group">
            <input class="form-control" id="username" type="text" name="username" />
            <div class="input-group-btn">
                <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">The button <span class="caret"></span>
                </button>
                <ul class="dropdown-menu dropdown-menu-right">
                    <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                    <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                    <li class="divider"></li>
                    <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
                </ul>
            </div>
        </div>

        <%= input input   => { text_field => ['username'] },
                  prepend => { buttongroup => [
                                  buttons => [
                                    ['Link 1', ['http://www.example.com/'] ],
                                    [undef, caret, items => [
                                          ['Item 1', ['item1'] ],
                                          ['Item 2', ['item2'] ],
                                          [],
                                          ['Item 3', ['item3'] ],
                                      ],
                                   ],
                                ],
                             ],
                          },
        %>

        <div class="input-group">
            <div class="input-group-btn">
                <a class="btn btn-default" href="http://www.example.com/">Link 1</a>
                <div class="btn-group">
                    <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown"><span class="caret"></span>
                    </button>
                    <ul class="dropdown-menu">
                        <li><a class="menuitem" href="item1" tabindex="-1">Item 1</a></li>
                        <li><a class="menuitem" href="item2" tabindex="-1">Item 2</a></li>
                        <li class="divider"></li>
                        <li><a class="menuitem" href="item3" tabindex="-1">Item 3</a></li>
                    </ul>
                </div>
            </div>
            <input class="form-control" id="username" type="text" name="username" />
        </div>

  Navs
   Syntax
        <%= nav %has,
                $type => [ |link|,
                          (items => [ |item| ])
                        ]
        %>

    "Navs" are syntactically similar to button groups.

    "$type => [...]"

    Mandatory. $type is either "pills" or "tabs" (or "items" if the "nav" is
    in a navbar) and applies the adequate class to the surrounding "ul".

        "items => [ |item| ]"

        If present does the same as "items" in dropdown. Also see "item".

   Examples
        <%= nav pills => [
                    ['Item 1', ['#'] ],
                    ['Item 2', ['#'], active ],
                    ['Item 3', ['#'] ],
                    ['Item 4', ['#'], disabled ],
                ]
        %>

        <ul class="nav nav-pills">
            <li><a href="#">Item 1</a></li>
            <li class="active"><a href="#">Item 2</a></li>
            <li><a href="#">Item 3</a></li>
            <li class="disabled"><a href="#">Item 4</a></li>
        </ul>

        <%= nav justified, id => 'my-nav', tabs => [
                    ['Item 1', ['#'] ],
                    ['Item 2', ['#'], active ],
                    ['Item 3', ['#'] ],
                    ['Dropdown', ['#'], caret, items => [
                            ['There are...', ['#'] ],
                            ['...three...', ['#'] ],
                            [],
                            ['...choices', ['#'] ],
                        ],
                    ],
                ]
        %>

        <ul class="nav nav-justified nav-tabs" id="my-nav">
            <li><a href="#">Item 1</a></li>
            <li class="active"><a href="#">Item 2</a></li>
            <li><a href="#">Item 3</a></li>
            <li class="dropdown">
                <a class="dropdown-toggle" data-toggle="dropdown" href="#">Dropdown <span class="caret"></span></a>
                <ul class="dropdown-menu">
                    <li><a href="#">There are...</a></li>
                    <li><a href="#">...three...</a></li>
                    <li class="divider"></li>
                    <li><a href="#">...choices</a></li>
                </ul>
            </li>
        </ul>

  Navbars
   Syntax
        navbar (inverse,) header => [ |link|, %navbar_has ],
                     form => [
                         [ [ $url ], %form_has ],
                         [
                             formgroup => [ |formgroup| ],
                             input => [ |input| ],
                             button => [ |button| ],
                             submit_button => [ |submit_button| ],
                          ]
                      ],
                      button => [ |button| ],
                      nav => [ |nav| ]
                      p => [ $text, %p_has ]

    "Navbars" are complex structures. They take the following arguments:

    "inverse"

    The "inverse" strapping is currently outside the %navbar_has. It applies
    the ".navbar-inverse" class.

    "header => [ |link|, %navbar_has ]"

    "header" creates a "navbar-header". There can be only one "header".

        "|link|"

        Creates the "brand". Set the link text to "undef" if you don't want
        a brand.

        %navbar_has

        Can take the following extra arguments:

            The "hamburger" strapping creates the menu button for collapsed
            navbars.

            "toggler => $collapse_id"

            This sets the "id" on the collapsing part of the navbar. Set it
            if you need to reference that part of the navbar, otherwise an
            id will be generated.

    The following arguments can appear any number of times, and is rendered
    in order.

        "button => [ |button| ]"

        Creates a button.

        "nav => [ |nav| ]"

        Creates a nav. Use "items" if you need to create submenus.

        "p => [ $text, %p_has ]"

        Creates a "<p>$text</p>" tag.

        "form => [...]"

        Creates a "form", by leveraging form_for in
        Mojolicious::Plugin::TagHelpers.

            "[ [ $url ], %form_has ]"

            Mandatory array reference. This sets up the "form" tag.

            "[...]"

            Mandatory array reference. The second argument to "form" can
            take different types (any number of times, rendered in order):

                "formgroup => [ |formgroup| ]"

                "input => [ |input| ]"

                "button => [ |button| ]"

                "submit_button => [ |submit_button| ]"

                Creates form groups, input groups, buttons and
                submit_buttons

   Examples
        <%= navbar header => ['The brand', ['#'], hamburger, toggler => 'bs-example-navbar-collapse-2'],
                   nav => [ items => [
                           ['Link', ['#'] ],
                           ['Another link', ['#'], active ],
                           ['Menu', ['#'], caret, items => [
                               ['Choice 1', ['#'] ],
                               ['Choice 2', ['#'] ],
                               [],
                               ['Choice 3', ['#'] ],
                           ] ],
                       ]
                   ]
        %>

        <nav class="navbar navbar-default">
            <div class="container-fluid">
                <div class="navbar-header">
                    <button class="collapsed navbar-toggle" data-target="#bs-example-navbar-collapse-2" data-toggle="collapse" type="button">
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                    </button>
                    <a class="navbar-brand" href="#">The brand</a>
                </div>
                <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-2">
                    <ul class="nav navbar-nav">
                        <li><a href="#">Link</a></li>
                        <li class="active"><a href="#">Another link</a></li>
                        <li class="dropdown">
                            <a class="dropdown-toggle" data-toggle="dropdown" href="#">Menu <span class="caret"></span></a>
                            <ul class="dropdown-menu">
                                <li><a href="#">Choice 1</a></li>
                                <li><a href="#">Choice 2</a></li>
                                <li class="divider"></li>
                                <li><a href="#">Choice 3</a></li>
                            </ul>
                        </li>
                    </ul>
                </div>
            </div>
        </nav>

        <%= navbar header => ['Brand', ['#'], hamburger, toggler => 'collapse-4124'],
                   nav => [ items => [
                           ['Link', ['#'], active ],
                           ['Link', ['#'] ],
                           ['Dropdown', ['#'], caret, items => [
                               ['Action', ['#'] ],
                               ['Another action', ['#'] ],
                               ['Something else here', ['#'] ],
                               [],
                               ['Separated link', ['#'] ],
                               [],
                               ['One more separated link', ['#'] ],
                           ] ] ],
                    ],
                    form => [
                        [['/login'], method => 'post', left],
                        [
                            formgroup => [
                                text_field => ['the-search', placeholder => 'Search' ],
                            ],
                            submit_button => ['Submit'],
                        ]
                    ],
                    nav => [
                        right,
                        items => [
                            ['Link', ['#'] ],
                            ['Dropdown', ['#'], caret, items => [
                                    ['Action', ['#'] ],
                                    ['Another action', ['#'] ],
                                    ['Something else here', ['#'] ],
                                    [],
                                    ['Separated link', ['#'] ],
                                ],
                            ]
                        ],
                    ]
        %>

        <nav class="navbar navbar-default">
            <div class="container-fluid">
                <div class="navbar-header">
                    <button type="button" class="collapsed navbar-toggle" data-toggle="collapse" data-target="#collapse-4124">
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                    </button>
                    <a class="navbar-brand" href="#">Brand</a>
                </div>
                <div class="collapse navbar-collapse" id="collapse-4124">
                    <ul class="nav navbar-nav">
                        <li class="active"><a href="#">Link</a></li>
                        <li><a href="#">Link</a></li>
                        <li class="dropdown">
                            <a class="dropdown-toggle" data-toggle="dropdown" href="#">Dropdown <span class="caret"></span></a>
                            <ul class="dropdown-menu">
                                <li><a href="#">Action</a></li>
                                <li><a href="#">Another action</a></li>
                                <li><a href="#">Something else here</a></li>
                                <li class="divider"></li>
                                <li><a href="#">Separated link</a></li>
                                <li class="divider"></li>
                                <li><a href="#">One more separated link</a></li>
                            </ul>
                        </li>
                    </ul>
                    <form action="/login" class="navbar-form navbar-left" method="post">
                        <div class="form-group">
                            <input class="form-control" id="the-search" name="the_search" placeholder="Search" type="text" />
                        </div>
                        <button class="btn btn-default" type="submit">Submit</button>
                    </form>
                    <ul class="nav navbar-nav navbar-right">
                        <li><a href="#">Link</a></li>
                        <li class="dropdown">
                            <a class="dropdown-toggle" data-toggle="dropdown" href="#">Dropdown <span class="caret"></span></a>
                            <ul class="dropdown-menu">
                                <li><a href="#">Action</a></li>
                                <li><a href="#">Another action</a></li>
                                <li><a href="#">Something else here</a></li>
                                <li class="divider"></li>
                                <li><a href="#">Separated link</a></li>
                            </ul>
                        </li>
                    </ul>
                </div>
            </div>
        </nav>

  Panels
    Bootstrap documentation <http://getbootstrap.com/components/#panels>

   Syntax
        %= panel ($title, %has, begin
            $body
        %  end)

    $title

    Usually mandatory, but can be omitted if there are no other arguments to
    the "panel". Otherwise, if you don't want a title, set it "undef".

    $body

    Optional (but panels are not much use without it). The html inside the
    "panel".

   Examples
        %= panel

        <div class="panel panel-default">
            <div class="panel-body">
            </div>
        </div>

        %= panel undef ,=> begin
            <p>A short text.</p>
        %  end

        <div class="panel panel-default">
            <div class="panel-body">
                <p>A short text.</p>
            </div>
        </div>

        %= panel 'The Header' => begin
            <p>A short text.</p>
        %  end

        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title">The Header</h3>
            </div>
            <div class="panel-body">
                <p>A short text.</p>
            </div>
        </div>


        %= panel 'Panel 5', success, begin
            <p>A short text.</p>
        %  end

        <div class="panel panel-success">
            <div class="panel-heading">
                <h3 class="panel-title">Panel 5</h3>
            </div>
            <div class="panel-body">
                <p>A short text.</p>
            </div>
        </div>

  Tables
    Bootstrap documentation <http://getbootstrap.com/css/#tables>

   Syntax
        %= table ($title,) %table_has, panel => { %panel_has }, begin
               $body
        %  end

    $title

    Optional. If set the table will be wrapped in a panel, and the table
    replaces the body in the panel.

    $body

    Mandatory. "thead", "td" and so on.

    "panel => { %panel_has }"

    Optional if the table has a $title, otherwise without use.

   Examples
        <%= table begin %>
            <tr><td>Table 1</td></tr>
        <% end %>

        <table class="table">
            <tr><td>Table 1</td></tr>
        </table>

        %= table hover, striped, condensed, begin
            <tr><td>Table 2</td></tr>
        %  end

        <table class="table table-condensed table-hover table-striped">
            <tr><td>Table 2</td></tr>
        </table>

        %= table 'Heading Table 4', panel => { success }, condensed, id => 'the-table', begin
            <tr><td>Table 4</td></tr>
        %  end

        <div class="panel panel-success">
            <div class="panel-heading">
                <h3 class="panel-title">Heading Table 4</h3>
            </div>
            <table class="table table-condensed" id="the-table">
                <tr><td>Table 4</td></tr>
            </table>
        </div>

OPTIONS
    Some options are available:

        $app->plugin('BootstrapHelpers', {
            tag_prefix => 'bs',
            short_strappings_prefix => 'set',
            init_short_strappings => 1,
            icons => {
                class => 'glyphicon'
                formatter => 'glyphicon-%s',
            },
        });

  tag_prefix
    Default: "undef"

    If you want to you change the name of the tag helpers, by applying a
    prefix. These are not aliases; by setting a prefix the original names
    are no longer available. The following rules are used:

    *   If the option is missing, or is "undef", there is no prefix.

    *   If the option is set to the empty string, the prefix is "_". That
        is, "panel" is now used as "_panel".

    *   If the option is set to any other string, the prefix is that string.
        If you set "tag_prefix => 'bs'", then "panel" is now used as
        "bspanel".

  short_strappings_prefix
    Default: "undef"

    This is similar to "tag_prefix", but is instead applied to the short
    form strappings. The same rules applies.

  init_short_strappings
    Default: 1

    If you don't want the short form of strappings setup at all, set this
    option to a defined but false value.

    All functionality is available, but instead of "warning" you must now
    use "__warning => 1".

    With short form turned off, sizes are still only supported in long form:
    "__xsmall", "__small", "__medium" and "__large". The Bootstrap
    abbreviations ("xs" - "lg") are not used.

  icons
    Default: not set

    By setting these keys you activate the "icon" helper. You can pick any
    icon pack that sets one main class and one subclass to create an icon.

        "class"

        This is the main icon class. If you use the glyphicon pack, this
        should be set to 'glyphicon'.

        "formatter"

        This creates the specific icon class. If you use the glyphicon pack,
        this should be set to 'glyphicon-%s', where the '%s' will be
        replaced by the icon name you give the "icon" helper.

AUTHOR
    Erik Carlsson <csson@cpan.org>

COPYRIGHT
    Copyright 2014- Erik Carlsson

    Bootstrap itself is (c) Twitter. See their license information
    <http://getbootstrap.com/getting-started/#license-faqs>.

    Mojolicious::Plugin::BootstrapHelpers is third party software, and is
    not endorsed by Twitter.

LICENSE
    This library is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.