The caveman2-widgets Reference Manual

Table of Contents

The caveman2-widgets Reference Manual

This is the caveman2-widgets Reference Manual, version 0.5, generated automatically by Declt version 3.0 "Montgomery Scott" on Wed Mar 25 17:00:23 2020 GMT+0.

1 Introduction

* caveman2-widgets
** What is it
caveman2-widgets is an extension library to [[https://github.com/fukamachi/caveman][caveman2]]. It is influenced
by [[https://github.com/skypher/weblocks][Weblocks]] and introduces its widget system for the developer. By
only using its widget concept it does not control the developer as
much as Weblocks itself. For people who don't now Weblocks' approach:
the developer can create web applications (more) like a normal GUI
application by using subclassable widgets which can have callbacks and
their like. Each Widget is only responsible for its own content but
might interfere with other objects through a given context.
#+LATEX: \\\\
But the really cool part is that the framework automatically creates
your site for dynamically (JavaScript based) access *and* normal
access. For the dynamic approach this means that you don't have to
manage or even care to refresh parts of your website, because widgets
can do that by themselves!

#+CAPTION: Quick overview where caveman2-widgets is in the caveman2 ecosystem
#+ATTR_LATEX: :width 10cm
#+LABEL: fig:overview
[[overview.jpg]]

** Installation
You can use caveman2-widgets with Quicklisp!
#+BEGIN_SRC lisp
(ql:quickload :caveman2-widgets)
#+END_SRC

If you want to contribute or be always up to date you can clone this
git-repository into "~/quicklisp/local-projects" or (if you are using
[[https://github.com/roswell/roswell][Roswell]]) "~/.roswell/local-projects" to QUICKLOAD it.
** See also
- [[https://github.com/ritschmaster/caveman2-widgets-bootstrap][caveman2-widgets-bootstrap]] :: Introduces new widgets that use
     [[https://getbootstrap.com/][Bootstrap]].
- [[https://github.com/ritschmaster/caveman2-widgets-blog][caveman2-widgets-blog]] :: An example application to demonstrate
     caveman2-widgets

** Websites running caveman2-widgets
- [[https://free-your-pc.com][Free-your-PC]] :: My personal website where I have among others a web
                  shop

Let me know if you use it too, to include you here!
** Contributions
You are very welcomed to contribute to this project! You can contribute by:
- Using it and spreading the word!
- Finding flaws and submitting [[https://github.com/ritschmaster/caveman2-widgets/issues][Issues]].
- Finding flaws and removing them (as [[https://github.com/ritschmaster/caveman2-widgets/pulls][Pull-requests]]).
- Adding new features (as [[https://github.com/ritschmaster/caveman2-widgets/pulls][Pull-requests]]). Before shooting in the dark
  create either an [[https://github.com/ritschmaster/caveman2-widgets/issues][Issues]] or mail me. Maybe your feature is on my
  agenda too.
- Showing your appreciation through a donation (please mail me for my
  IBAN). It may be a donation in kind too! Via PayPal you can donate
  to: richard.baeck@free-your-pc.com

If you add new features, please document them. Otherwise other
developers will have a hard time using this framework.
** Usage
*** General 
The only important thing is to run the function INIT-WIDGETS with an
. If you use caveman's MAKE-PROJECT function you will get file
called "src/web.lisp". In this file you can adapt the following:
#+BEGIN_SRC lisp

(defpackage my-caveman2-webapp.web
  (:use :cl
        :caveman2
        :caveman2-widgets ;; easy use of the external symbols of this project
        :my-caveman2-webapp.config
        :my-caveman2-webapp.view
        :my-caveman2-webapp.db
        :datafly
        :sxql)
  (:export :*web*))

;; some other code

;; the following will be generated through MAKE-PROJECT but is very important:
(defclass  () ())
(defvar *web* (make-instance '))
(clear-routing-rules *web*)


;; the neccessary call to initialize the widgets:
(init-widgets *web*)

;; from now on you can do whatever you want
#+END_SRC

*If you create objects from your widget classes, then please always
use the MAKE-WIDGET function!* This method should be used, since it
does all the background stuff for you.

*** Global scope
There are two scopes: /global/ and /session/. The global scope
"limits" the widget to *all* users. Therefore if you create a stateful
widget the state will be displayed to all users of your site. Use
MAKE-WIDGET with :GLOBAL to get a globally scoped widget.
#+LATEX: \\\\
A very simple example of what you can do with it:
#+BEGIN_SRC lisp
(defclass  ()
  ((enabled
    :initform nil
    :accessor enabled)))

(defmethod render-widget ((this ))
  (if (enabled this)
      "
enabled!
"
      "
not enabled
"))

(defvar *global-widget* (make-widget :global '))

(defroute "/" ()
  (render-widget *global-widget*))

(defroute "/disable" ()
  (setf (enabled *global-widget*) nil)
  "disabled it")

(defroute "/enable" ()
  (setf (enabled *global-widget*) t)
  "enabled it")
#+END_SRC

A good practice to create disposable widgets is to mark
them :GLOBAL. In the following example the widget will be created when
a user connects and will afterwards immediately be destroyed again by
the garbage collector.
#+BEGIN_SRC lisp
(defroute "/" ()
  (render-widget
    (make-widget :global '
                 :text "Hello world!"))
#+END_SRC

*** Session scope
The other option is to use a /session/ scope. This is a bit more
tricky because all your /session/ widgets must be stored within the
session (but not as user of this framework). :SESSION is the keyword
for MAKE-WIDGET to get a /session/ widget. Of course you only need to
save the top level (highest) widget of a widget tree in the session
(the children will be saved where the parent is). A short overview of
the functions:
- SET-WIDGET-FOR-SESSION :: Saves a widget in the session
     variable. This should be considered ONLY for session scoped
     widgets.
- GET-WIDGET-FOR-SESSION :: Gets a previously saved widget from the
     session variable (e.g. to render it).
- REMOVE-WIDGET-FOR-SESSION :: Removes a saved widget from the session
     variable.

An example (with children):
#+BEGIN_SRC lisp
(defclass  ()
  ())

(defmethod render-widget ((this ))
  (concatenate 'string
               "
display-id-widget id: "
               (caveman2-widgets.widget::id this)
               "
"))

(defclass  ()
  ((id-widget
    :initform (make-widget :session ')
    :reader id-widget)))

(defmethod render-widget ((this ))
  (concatenate 'string
               "
The id of your widget
"
               "
It should be different for each session
"
               "
My id: "
               (caveman2-widgets.widget::id this)
               "
"
               (render-widget (id-widget this)))) 

(defroute "/" ()
  (set-widget-for-session :session-widget
                          (make-widget :session '))
  (concatenate 'string
               "


"

             (render-widget
              (get-widget-for-session :session-widget))
             (render-widget
              (make-widget :global '
                           :label "Reset session"
                           :callback #'(lambda ()
                                         (remove-widget-for-session 
                                          :session-widget))))))

(defroute "/reset-session" ()
  (remove-widget-for-session :session-widget)
  "reset your session")
#+END_SRC

*** Some default widgets and layouts
There are some helpful default widgets which may help you with your
code organisation. These are:
-  :: A layout which contains widgets that will be rendered
     vertically.
-  :: A layout like the  but renders the
     widgets horizontally.
-  :: A layout which features sections to put widgets
     in. Please note that this widget has styles in
     */static/css/widgets.css*.
-  :: A widget which renders only a string.
-  :: A widget which uses a supplied function for
     rendering. Therefore the supplied function has to return a
     string!

A simple example:
#+BEGIN_SRC lisp
(defroute "/composite" ()
  (with-html-document
      (doc
       (make-instance '))
      (setf (body doc)
            (make-widget
             :global '
             :east (make-widget :global '
                                :text "
Hello from east
")
             :center
             (make-widget
              :global '
              :widgets (list
                        (make-widget :global '
                                     :text "
Hello from left
")
                        (make-widget :global '
                                     :function
                                     #'(lambda ()
                                         "
Hello from the mid
"))
                        (make-widget :global '
                                     :text "
Hello from right
")))
             :west (make-widget :global '
                                :text "
Hello from west
")))))
#+END_SRC
*** Buttons and links 
You can use buttons and links that call specific functions. When you
create a button/link only for a session the created route will be
guarded. Therefore only the user with the associated route may
actually access his button.
#+LATEX: \\\\
For each button there will be an URI like "/buttons/BUTTONID". You can
access buttons via POST only. Links get a URI like "/links/LINKID" and
can be accessed either by GET (get a redirect to the stored link) or
by POST (return only the value of the link). In any case the callback
function gets called - please keep that in mind.
#+LATEX: \\\\
If the return value of the link matches the current path then the side
will be reloaded entirely or, if JavaScript is enabled, the dirty
widgets will be reloaded. Please leave out the starting "/" If you
want to address a target on the localhost. E.g. you are on the page
"/test", then return "test" if you want to stay on it.
#+LATEX: \\\\
The BUTTONID and LINKID are the ID slots of the widget - which is
default a symbol generated by GENSYM. But you can change that by
giving your  a specific ID (like in the example
below). This will ensure that the route will persist otherwise the
route for the  will change with every restart of your
website or with every new session (depends on the scope). *Be careful,
the ID must be unique on object level, otherwise you overwrite
routes!*
#+LATEX: \\\\
An example:
#+BEGIN_SRC lisp
(defvar *got-here-by-link* nil)

(defroute "/otherpage" ()
  (if *got-here-by-link*
      (progn
        (setf *got-here-by-link* nil)
        "
Got here by pressing the link
")
      "
Got here by yourself
"))

(defroute "/link-test" ()
  (concatenate 'string
               (render-widget
                (make-widget :global '
                             :label "Github"
                             :callback #'(lambda (args)
                                           (format t "LOG: Link clicked!")
                                           "http://github.com/ritschmaster")
                             :target-foreign-p t ;; The link goes out of this domain
                             ))
               (render-widget
                (make-widget :global '
                             :label "Otherpage"
                             :id "otherpage" ;; href="/links/otherpage"
                             :callback #'(lambda (args)
                                           (setf *got-here-by-link* t)
                                           "/otherpage")
                             :target-foreign-p t ;; The link goes out of this domain
                             ))
               (render-widget
                (make-widget :global '
                             :label "Button"
                             :callback #'(lambda (args)
                                           (format t
                                                   "LOG: Button clicked!"))))))
#+END_SRC

You can create your own callback widgets too. Just look at the
,  classes for that.

*** Use caveman2-widgets for your entire HTML document
To make your life really easy you can create an entire HTML
document. You can either tinker your own widgets or whatever with the
 and the  or you can use the
handy WITH-HTML-DOCUMENT macro.

#+BEGIN_SRC lisp
(defclass  ()
  ())

(defmethod render-widget ((this ))
  "Hello world!")

(defclass  ()
  ())

(defmethod render-widget ((this ))
  "Hello from the other page!")

(defvar *header-widget* (make-instance '
                                       ;; the title when this header is used
                                       :title "Widgets test"

                                       ;; the icon when this header is used
                                       :icon-path "/images/icon.png"

                                       ;; the following lines will be rendered in the header:
                                       :other-header-content 
                                       '(""))
(defvar *root-widget* (make-widget :global '))
(defvar *otherpage-widget* (make-widget :global '))

(defroute "/" ()
  ;; The *root-widget* can be accessed under:
  ;; /rest/root-widget?id=(caveman2-widgets.widget::id *root-widget*)
  (render-widget
   (make-instance '
                  ;; sets this specific header for this page
                  :header *header-widget*
                  :body *root-widget*)))
(defroute "/otherpage" ()
  (with-html-document (doc
                       *header-widget*)
    (setf (body doc)
           *otherpage-widget*)))

#+END_SRC

*** Marking widgets dirty
You can mark specific widgets as dirty with the function
MARK-DIRTY. This means that they will be reloaded dynamically (if the
user has JavaScript is enabled). Please notice that you can mark *any*
widget as dirty. Therefore you can order JavaScript to reload global
widgets and sessioned widgets.
#+LATEX: \\\\
An example:
#+BEGIN_SRC lisp
(defclass  ()
  ((enabled
    :initform nil
    :accessor enabled)))

(defmethod render-widget ((this ))
  (concatenate 'string
               "
Sessioned-widget:
"
               (if (enabled this)
                   "
enabled!
"
                   "
not enabled
")))


(defclass  ()
  ())

(defmethod render-widget ((this ))
  (concatenate 'string
               "
MARK-DIRTY test
"
               (render-widget
                (get-widget-for-session :sessioned-widget))
               (render-widget
                (make-widget
                 :global '
                 :label "Enable"
                 :callback #'(lambda ()
                     (let ((sessioned-widget
                            (get-widget-for-session :sessioned-widget)))
                       (when sessioned-widget
                         (setf (enabled sessioned-widget) t)
                         (mark-dirty sessioned-widget))))))
               (render-widget
                (make-widget
                 :global '
                 :label "Disable"
                 :callback #'(lambda ()
                     (let ((sessioned-widget
                            (get-widget-for-session :sessioned-widget)))
                       (when sessioned-widget
                         (setf (enabled sessioned-widget) nil)
                         (mark-dirty sessioned-widget))))))))

(defvar *header-widget* (make-instance '
                                       :title "Mark-dirty test"))
(defvar *my-body-widget* (make-widget :global '))

(defroute "/mark-dirty-test" ()
  (set-widget-for-session :sessioned-widget (make-widget :session '))
  (render-widget
   (make-instance '
                  :header *header-widget*
                  :body *my-body-widget*)))
#+END_SRC

*** Navigation objects
You can create navigation objects too! The purpose of navigation
objects is that you don't have to manage a navigation ever again!
Each navigation object contains another widget which displays the
currently selected path. If you click on a navigation link that object
is changed and refreshed (either via JavaScript or through the
link). Please keep in mind that navigation objects are *session
stateful widgets*.
#+LATEX: \\\\
Paths are only created automatically by the DEFNAV macro. The first
item in the list is the widget which will be displayed at the base
path of the navigation. You can use any string as path but be careful
to not interfere with the special paths of NINGLE
(e.g. "/:some-path"). Do not use those. The only special path you can
use is the wildcard (e.g "/*/").
#+LATEX: \\\\
A very basic example:
#+BEGIN_SRC lisp
(defvar *first-widget*
  (make-widget :global '
               :text "
Hello world from first
"))

(defvar *second-widget*
  (make-widget :global '
               :text "
Hello world from second
"))

(defclass  ()
  ()
  (:documentation "This class enables session based widgets for a
navigation."))

(defmethod render-widget ((this ))
  (set-widget-for-session :string-widget
                          (make-widget :session '
                                       :text "hello world"))
  (render-widget (get-widget-for-session :string-widget)))

(defnav "/sophisticated/path"
    ((make-instance '
                    :title "Navigation test")
     (list
      (list "First widget" "first" *first-widget*)
      (list "Second widget" "second" *second-widget*)
      (list "Third widget" "third" (make-widget :global
                                                '))
      (list "Hidden widget" "hidden"
            (make-widget :global '
                         :text "
You have accessed a hidden widget!
")
            :hidden))
     :kind '))
#+END_SRC

If the default navigation object doesn't render as you wish, you can
subclass it and overwrite the RENDER-WIDGET method. Please notice that
you can actually very easily adjust the path where the navigation and
its widgets get rendered. The slot BASE-PATH is created for that.
#+LATEX: \\\\
There are two default navigation widgets:
-  :: A navigation with a menu. You can change
     the menu appearance with CSS. With the :HIDDEN keyword you can
     hide a path from the navigation list.
-  :: A navigation without any menu. It is
     controlled by the URL only - or by other widgets.
*** Table objects
You can create a table very simple. A  displays *all*
items which are supplied through the PRODUCER function.
#+LATEX: \\\\
Important for the usage of tables is that you supply a PRODUCER
function. The function should return a list of 
objects. This function can be anything but it has to take the key
arguments:
- AMOUNT :: Tells how many items to get
- ALREADY :: Tells how many items already received
- LENGTH-P :: A flag which should tell the function to return the
              available items if active.
AMOUNT and ALREADY can be seen as synonyms for FROM and TO.
#+LATEX: \\\\
A  object is needed for tables. The essence of those
objects is that they can be translated to lists through the generic
function GET-AS-LIST. Therefore you don't have to subclass
 at all just to add an implementation of GET-AS-LIST for
your used class.
#+LATEX: \\\\
For the  consider the following example:
#+BEGIN_SRC lisp
(defclass  ()
  ((id
    :initarg :id
    :reader id)
   (name
    :initarg :name
    :reader name)
   (description
    :initarg :description
    :reader description)))

(defmethod get-as-list ((this ))
  (list :id (id this)
        :name (name this)
        :description (description this)))

(defun producer (&key
                   amount
                   (already 0)
                   (length-p nil))
  (if (null length-p)
      (let ((all '()))
        (if (null amount)
            (loop for x from 1 to 1000 do
                 (setf all
                       (append all
                               (list
                                (make-instance '
                                               :id x
                                               :name (format nil "~a" x)
                                               :description (format nil "The ~a. item." x))))))
            (loop for x from (+ already 1) to (+ already amount) do
                 (setf all
                       (append all
                               (list
                                (make-instance '
                                               :id x
                                               :name (format nil "~a" x)
                                               :description (format nil "The ~a. item." x)))))))
        all)
      1000))

(defvar *table-widget*
  (make-widget :global '
               :producer 'producer
               :column-descriptions (list
                                     (list :name "Name")
                                     (list :description "Description"))))

(defroute "/table" ()
  (with-html-document (doc
                       (make-instance '))
    (setf (body doc)
          *table-widget*)))
#+END_SRC

*** Viewgrids
The  is used to display a bulk of heterogenous
items. The items must implement the RENDER-AS method. The
 calls RENDER-AS with its VIEW slot. Therefore you
have provide an implementation for the keyword supplied by VIEW in
your .
#+LATEX: \\\\
You can limit the displayed items with the MAX-ITEMS-TO-DISPLAY
slot. If this slot is active the items are delivered on several pages
instead on only one. If you supply additionally the DISPLAY-SELECTOR
with the URI path on which the  object is rendered,
then selectable page numbers are displayed on the bottom too.
#+LATEX: \\\\
Each item can be accessed. When accessing the item a specific
given function is called with the item as parameter.
#+LATEX: \\\\
The following example covers all functionality:
#+BEGIN_SRC lisp
(defclass  ()
  ((id
    :initarg :id
    :reader id)
   (name
    :initarg :name
    :reader name)
   (description
    :initarg :description
    :reader description)))

(defmethod render-as ((this ) (view (eql :short)))
  (format nil "
id: ~a
name: ~a
desc: ~a
"
          (id this) (name this) (description this)))

(defun producer (&key
                   (from 0)
                   (to nil)
                   (length-p nil))
  (let ((all '()))
    (loop for x from 1 to 35 do
         (setf all
               (append all
                       (list
                        (make-instance '
                                       :id x
                                       :name (format nil "~a" x)
                                       :description (format nil "The ~a. item." x))))))
    (cond
      (length-p
       (length all))
      ((and from (not to))
       (mapcan #'(lambda (item)
                   (if (>= (id item) from)
                       (list item)
                       nil))
               all))
      ((and from to)
       (mapcan #'(lambda (item)
                   (if (and (>= (id item) from) (< (id item) to))
                       (list item)
                       nil))
               all)))))

(defroute "/viewgrid" ()
  (with-html-document (doc
                       (make-instance '))
    (set-widget-for-session
     :viewgrid
     (make-widget :session '
                  :producer #'producer
                  :view :short
                  :max-items-to-display 11
                  :display-selector "viewgrid"
                  :on-view #'(lambda (item)
                               (format t
                                       (render-as item :short))
                               "viewgrid")))
    (setf (body doc)
          (get-widget-for-session :viewgrid))))
#+END_SRC
*** Forms
Forms can be pretty annoying but with the  you don't have
to care for anything but for the naming of the inputs ever again. Each
 consists of 0 to n  objects. If you have 0
 objects it essentially only behaves like a
.
#+LATEX: \\\\
 is the base class for fields. Fields can be:
-  :: Is basically an abstraction of the HTML input-tag. 
-  :: Consists of  objects.

Of course you can implement your own  classes too! But
keep in mind that *the default  already implements
constraints*.
#+LATEX: \\\\
To understand how constraints for forms work an examination of the
available slots for  objects is necessary:
- REQUIRED :: A non-nil value indicates that this field has to have
              some value.
- SUPPLIED :: Will be set NIL by SET-REQUIRED-PRESENT and set T by
              RENDER-WIDGET. It is NIL if the field is not supplied
              and is therefore not dependent on REQUIRED. It should
              tell the server whether an parameter was passed or not.
- CHECK-FUNCTION :: Will be called by SET-REQUIRED-PRESENT and check
                    if the passed value by the client is "correct". It
                    is a lambda with one argument, which is the passed
                    string from the client. Should return NIL if the
                    passed string was not correct and a non-nil value
                    otherwise.
- ERROR-HAPPENED :: Will be set to T by SET-REQUIRED-PRESENT if the
                    CHECK-FUNCTION did not succeed. The rendering the
                    form will set it to NIL again.
- ERROR-MESSAGE :: The message that will be displayed if
                   ERROR-HAPPENED is T.

You don't have to actually care for that procedure as the
 calls this the SET-REQUIRED-PRESENT by itself. But it
can be helpful to understand the entire process of checking the user
input. The only thing to really memorize here is that *the given
callback only gets called if all required fields where supplied and
those fields where supplied correctly*.
#+LATEX: \\\\
Consider the following example for additional help:
#+BEGIN_SRC lisp
(defvar *password-field*
  (make-instance '
                 :input-type "password"
                 :check-function
                 #'(lambda (pass)
                     (if (<= (length pass)
                             2)
                         nil
                         t))
                 :error-message "Has to be longer than 2"
                 :name "password"
                 :value ""))

(defvar *form-widget*
  (let ((text-field (make-instance '
                                   :input-type "text"
                                   :name "text"
                                   :value ""
                                   :required t))
        (choice-field (make-instance
                       '
                       :name "selection"
                       :options
                       (list (make-instance '
                                            :value "first")
                             (make-instance '
                                            :value "second"
                                            :display-value "Other")))))
    (make-widget :global '
                 :input-fields (list
                                text-field
                                *password-field*
                                choice-field)
                 :label "Submit"
                 :callback
                 #'(lambda (args)
                     (format t "received correct values:
~a
-------------"
                             args)))))

(defroute "/form" ()
  (with-html-document (doc
                       (make-instance '))
    (setf (body doc)
          *form-widget*)))
#+END_SRC
*** Protecting widgets
This library also enables you to protect widgets. Each widget has an
associated list of keywords which indicate the levels/circles of
authorization an requester needs.
#+LATEX: \\\\
By default the protection is an empty list (therefore NIL), which
means that everybody can access your widget. If the protection is
non-nil the non-nil value is a list of keywords which refers to a list
of keywords stored in the session. So if the session contains the
required keyword in its list the requester can access the
widget. Otherwise he is denied (throws a 403 code).
#+LATEX: \\\\
The  class holds the PROTECTED slot. This slots value
indicates the needed token in the session. But caveman2-widgets
supplies an additional, specific *PROTECT-WIDGET* method which should be
used. You can supply the following parameters:
- :LOGIN :: Protects the widget by the default login-widget
- A keyword in general :: Protects the widget with this keyword (adds
     it)
- A list of keywords :: Protects the widget with this keywords (adds
     them)

#+BEGIN_SRC lisp
(defvar *specific-protected-widget*
  (protect-widget
   (make-widget :global '
                :text "
This is a protected text
")
   :myprotection))

;; Should throw 403
(defroute "/protected-widget" ()
  (concatenate 'string
               "Will throw 403"

               (render-widget *specific-protected-widget*)))

(defmethod on-exception ((app ) (code (eql 403)))
  (declare (ignore app))
  "403 - The protection works.")
#+END_SRC

*** Login
Protecting certain widgets by a login is very easy. The 
organizes the following things:
1. It displays a login form and logs the client in if he passes the
   challenge. The successful pass sets will result in an permanent
   non-nil value if you call "(LOGGED-IN *SESSION*)". This means that
   every widget that requires the authroization level :LOGIN through
   the PROTECT-WIDGET method can now be accessed by the user.
2. It supplies a Logout button. This button can be access through the
   LOGOUT-BUTTON reader. You therefore can render the button anywhere
   you like. Pressing the button will result in a logout and therefore
   in a permanent NIL for "(LOGGED-IN *SESSION*)".
3. It renders certain widgets if the login was successful. This can be
   either used e.g. for a success message.

*The  has to run in :SESSION scope!*
#+LATEX: \\\\
Additionally you can specify different authentication challanges
(authentication functions) if you wish. But using the 
and passing the challenge will *only* set the authoriatzition level
to :LOGIN. This means that you need to create your own 
if you want some other level for different authentication functions! 

#+BEGIN_SRC lisp
(defvar *protected-widget*
  (protect-widget
   (make-widget :global '
                :text "
This is a protected text
")
   :login))

(defroute "/" ()
  (with-html-document (doc
                       (make-instance '))
    (setf (body doc)
          (make-widget
           :global '
           :function
           #'(lambda ()
               (set-widget-for-session ;; running it in the session
                :login-widget
                (make-widget :session '
                             :authenticator
                             #'(lambda (user password)
                                 (if (and (string= user "ritschmaster")
                                          (string= password "secret"))
                                     t
                                     nil))
                             :widgets
                             (list
                              *protected-widget*)))
               (render-widget
                (get-widget-for-session :login-widget)))))))
#+END_SRC
*** Language getting/setting
To store the accpeted languages in the session there is the
CHECK-AND-SET-LANGUAGE function. This function uses the value supplied
through the "Accept-languages" field in the HTTP request. It gets
called through the render method by any 
automatically. Which means that as soon as you use it you don't have
to worry about getting the language. But on the other hand you have to
make sure that every subclass of  again uses
CHECK-AND-SET-LANGUAGE in its render-method.
#+LATEX: \\\\
You can access the currently accepted languages through the
ACCEPTED-LANGUAGES.
#+LATEX: \\\\
If you rather use a manual language chooser you can supply
AUTOMATICALLY-SET-LANGUAGES as NIL to the INIT-WIDGETS
function. Please then use the setf method for ACCEPTED-LANGUAGES to
set the language.
*** Translations
Most strings that are rendered human readable get translated through a
special function. You can specify your own translation function by
passing it to INIT-WIDGETS as :TRANSLATION-FUNCTION. The function
header should look like this:
#+BEGIN_SRC lisp
(defvar *my-translation-function*
         #'(lambda (text
                     &key
                       plural-p
                       genitive-form-p
                       items-count
                       accusative-form-p
                       language
                     &allow-other-keys)
             text))
#+END_SRC

Strings that are translated:
- The page names of a navigation

Strings that are definitely *not* translated:
- The TEXT of a 
- The return value of a 

*** Development hooks
In case you want to do things at compile time (e.g. calling DEFROUTE)
whe INIT-WIDGETS is evaluated there is the variable
*INIT-WIDGETS-HOOKS*. Just append new functions as you wish.

#+BEGIN_SRC lisp
(setf *init-widgets-hooks*
      (append
       *init-widgets-hooks*
       (list
        #'(lambda ()
            (defroute "/something" ()
              ;; Accessing the user supplied  object:
              (describe caveman2-widgets::*web*)
              "something")))))
#+END_SRC 
** Important notes/Things that happen automatically
The following things you should keep in mind when using
caveman2-widgets.

*** Automatically REST API creation
If you create a widget then routes for a REST API will be added
automatically. Suppose you subclass  with the class
, then you will get the path "/rest/my-widget" which you
can access.

#+BEGIN_SRC lisp
(defclass  ()
  ())

(defmethod render-widget ((this ))
  "my-widget representation for the website")

(defmethod render-widget-rest ((this ) (method (eql :get)) (args t))
  "my-widget representation for the REST.")

(defmethod render-widget-rest ((this ) (method (eql :post)) (args t))
  (render-widget this))
#+END_SRC

Buttons and Links are *not* accessed through the REST path (see the
section above).

Widgets that are not accessible through the REST:
- 
- 

*** Encapsulating widgets with divs
Each widget gets wrapped in a div automatically. Every widget will get
its entire class heritage included in the CSS class
attribute. Therefore you can access every widget (and derived widget)
very easily with CSS.

*** JavaScript dependencies
When  is used all JavaScript dependencies are added
automatically. Please notice that these dependecies are needed to
ensure that the widgets work properly. If you don't want to use
 you have to manually add jQuery and all the JavaScript
Code supplied/needed by caveman2-widgets.

The routes for the JavaScript files (which have to be included in each
HTML file) are:
- /widgets/js/widgets.js

The jQuery-Version used is 2.2.2 minified. If you want another jQuery
file you can specify it with the variable \*jquery-cdn-link\* (should be
an URL).

*If you forget to use the JavaScript-files widgets might not work or
even break. Most likely all dynamic content just won't work
(automatically fallback to non-JS)*

*** CSS dependencies
As with JavaScript, stylesheets are added in the  automatically
too. The routes you need in your head tag are:
- /widgets/css/widgets.css

*** Session values
This section should inform you about keywords in the session variable
which you should absolutely not modify.
- :WIDGET-HOLDER ::  object. It holds all the session
                    scoped widgets.
- :DIRTY-OBJECT-IDS :: The name says it all.
- :JAVASCRIPT-AVAILABLE :: Holds a boolean value if JavaScript is
     available or not.
- :ACCEPT-LANGUAGE :: Holds the languages accepted by the client.

** Author

+ Richard Paul Bäck (richard.baeck@free-your-pc.com)

** Copyright

Copyright (c) 2016 Richard Paul Bäck (richard.baeck@free-your-pc.com)

** License

Licensed under the LLGPL License.

2 Systems

The main system appears first, followed by any subsystem dependency.

2.1 caveman2-widgets

Author

Richard Paul Bäck

License

LLGPL

Description

Weblocks like widgets for caveman2.

Long Description

* caveman2-widgets
** What is it
caveman2-widgets is an extension library to [[https://github.com/fukamachi/caveman][caveman2]]. It is influenced
by [[https://github.com/skypher/weblocks][Weblocks]] and introduces its widget system for the developer. By
only using its widget concept it does not control the developer as
much as Weblocks itself. For people who don’t now Weblocks’ approach:
the developer can create web applications (more) like a normal GUI
application by using subclassable widgets which can have callbacks and
their like. Each Widget is only responsible for its own content but
might interfere with other objects through a given context.
#+LATEX: \\\\
But the really cool part is that the framework automatically creates
your site for dynamically (JavaScript based) access *and* normal
access. For the dynamic approach this means that you don’t have to
manage or even care to refresh parts of your website, because widgets
can do that by themselves!

#+CAPTION: Quick overview where caveman2-widgets is in the caveman2 ecosystem
#+ATTR_LATEX: :width 10cm
#+LABEL: fig:overview
[[overview.jpg]]

** Installation
You can use caveman2-widgets with Quicklisp!
#+BEGIN_SRC lisp
(ql:quickload :caveman2-widgets)
#+END_SRC

If you want to contribute or be always up to date you can clone this
git-repository into "~/quicklisp/local-projects" or (if you are using
[[https://github.com/roswell/roswell][Roswell]]) "~/.roswell/local-projects" to QUICKLOAD it.
** See also
- [[https://github.com/ritschmaster/caveman2-widgets-bootstrap][caveman2-widgets-bootstrap]] :: Introduces new widgets that use [[https://getbootstrap.com/][Bootstrap]].
- [[https://github.com/ritschmaster/caveman2-widgets-blog][caveman2-widgets-blog]] :: An example application to demonstrate caveman2-widgets

** Websites running caveman2-widgets
- [[https://free-your-pc.com][Free-your-PC]] :: My personal website where I have among others a web
shop

Let me know if you use it too, to include you here!
** Contributions
You are very welcomed to contribute to this project! You can contribute by:
- Using it and spreading the word!
- Finding flaws and submitting [[https://github.com/ritschmaster/caveman2-widgets/issues][Issues]].
- Finding flaws and removing them (as [[https://github.com/ritschmaster/caveman2-widgets/pulls][Pull-requests]]).
- Adding new features (as [[https://github.com/ritschmaster/caveman2-widgets/pulls][Pull-requests]]). Before shooting in the dark create either an [[https://github.com/ritschmaster/caveman2-widgets/issues][Issues]] or mail me. Maybe your feature is on my agenda too.
- Showing your appreciation through a donation (please mail me for my
IBAN). It may be a donation in kind too! Via PayPal you can donate
to: richard.baeck@free-your-pc.com

If you add new features, please document them. Otherwise other
developers will have a hard time using this framework.
** Usage
*** General
The only important thing is to run the function INIT-WIDGETS with an
<APP>. If you use caveman’s MAKE-PROJECT function you will get file
called "src/web.lisp". In this file you can adapt the following:
#+BEGIN_SRC lisp

(defpackage my-caveman2-webapp.web
(:use :cl
:caveman2
:caveman2-widgets ;; easy use of the external symbols of this project
:my-caveman2-webapp.config
:my-caveman2-webapp.view
:my-caveman2-webapp.db
:datafly
:sxql)
(:export :*web*))

;; some other code

;; the following will be generated through MAKE-PROJECT but is very important:
(defclass <web> (<app>) ())
(defvar *web* (make-instance ’<web>))
(clear-routing-rules *web*)

;; the neccessary call to initialize the widgets:
(init-widgets *web*)

;; from now on you can do whatever you want
#+END_SRC

*If you create objects from your widget classes, then please always
use the MAKE-WIDGET function!* This method should be used, since it
does all the background stuff for you.

*** Global scope
There are two scopes: /global/ and /session/. The global scope
"limits" the widget to *all* users. Therefore if you create a stateful
widget the state will be displayed to all users of your site. Use
MAKE-WIDGET with :GLOBAL to get a globally scoped widget.
#+LATEX: \\\\
A very simple example of what you can do with it:
#+BEGIN_SRC lisp
(defclass <global-widget> (<widget>)
((enabled
:initform nil
:accessor enabled)))

(defmethod render-widget ((this <global-widget>))
(if (enabled this)
"<h1>enabled!</h1>"
"<h1>not enabled</h1>"))

(defvar *global-widget* (make-widget :global ’<global-widget>))

(defroute "/" ()
(render-widget *global-widget*))

(defroute "/disable" ()
(setf (enabled *global-widget*) nil)
"disabled it")

(defroute "/enable" ()
(setf (enabled *global-widget*) t)
"enabled it")
#+END_SRC

A good practice to create disposable widgets is to mark
them :GLOBAL. In the following example the widget will be created when
a user connects and will afterwards immediately be destroyed again by
the garbage collector.
#+BEGIN_SRC lisp
(defroute "/" ()
(render-widget
(make-widget :global ’<string-widget>
:text "Hello world!"))
#+END_SRC

*** Session scope
The other option is to use a /session/ scope. This is a bit more
tricky because all your /session/ widgets must be stored within the
session (but not as user of this framework). :SESSION is the keyword
for MAKE-WIDGET to get a /session/ widget. Of course you only need to
save the top level (highest) widget of a widget tree in the session
(the children will be saved where the parent is). A short overview of
the functions:
- SET-WIDGET-FOR-SESSION :: Saves a widget in the session
variable. This should be considered ONLY for session scoped
widgets.
- GET-WIDGET-FOR-SESSION :: Gets a previously saved widget from the
session variable (e.g. to render it).
- REMOVE-WIDGET-FOR-SESSION :: Removes a saved widget from the session
variable.

An example (with children):
#+BEGIN_SRC lisp
(defclass <display-id-widget> (<widget>)
())

(defmethod render-widget ((this <display-id-widget>))
(concatenate ’string
"<h3>display-id-widget id: <a href=\"/rest/display-id-widget?id="
(caveman2-widgets.widget::id this)
"\">"
(caveman2-widgets.widget::id this)
"</a></h3>"))

(defclass <session-widget> (<widget>)
((id-widget
:initform (make-widget :session ’<display-id-widget>)
:reader id-widget)))

(defmethod render-widget ((this <session-widget>))
(concatenate ’string
"<h1>The id of your widget</h1>"
"<h2>It should be different for each session</h2>"
"<p>My id: <a href=\"/rest/session-widget?id="
(caveman2-widgets.widget::id this)
"\">"
(caveman2-widgets.widget::id this)
"</a></p>"
(render-widget (id-widget this))))

(defroute "/" ()
(set-widget-for-session :session-widget
(make-widget :session ’<session-widget>))
(concatenate ’string
"<head>
<script src=\"https://code.jquery.com/jquery-2.2.2.min.js\" type=\"text/javascript\"></script>
<script src=\"/widgets/js/widgets.js\" type=\"text/javascript\"></script>
</head>"

(render-widget
(get-widget-for-session :session-widget))
(render-widget
(make-widget :global ’<button-widget>
:label "Reset session"
:callback #’(lambda ()
(remove-widget-for-session :session-widget))))))

(defroute "/reset-session" ()
(remove-widget-for-session :session-widget)
"reset your session")
#+END_SRC

*** Some default widgets and layouts
There are some helpful default widgets which may help you with your
code organisation. These are:
- <COMPOSITE-WIDGET> :: A layout which contains widgets that will be rendered
vertically.
- <HCOMPOSITE-WIDGET> :: A layout like the <COMPOSITE-WIDGET> but renders the
widgets horizontally.
- <BORDER-WIDGET> :: A layout which features sections to put widgets
in. Please note that this widget has styles in
*/static/css/widgets.css*.
- <STRING-WIDGET> :: A widget which renders only a string.
- <FUNCTION-WIDGET> :: A widget which uses a supplied function for
rendering. Therefore the supplied function has to return a
string!

A simple example:
#+BEGIN_SRC lisp
(defroute "/composite" ()
(with-html-document
(doc
(make-instance ’<header-widget>))
(setf (body doc)
(make-widget
:global ’<border-widget>
:east (make-widget :global ’<string-widget>
:text "<h2>Hello from east</h2>")
:center
(make-widget
:global ’<hcomposite-widget>
:widgets (list
(make-widget :global ’<string-widget>
:text "<h1>Hello from left</h1>")
(make-widget :global ’<function-widget>
:function
#’(lambda ()
"<h1>Hello from the mid</h1>"))
(make-widget :global ’<string-widget>
:text "<h1>Hello from right</h1>")))
:west (make-widget :global ’<string-widget>
:text "<h2>Hello from west</h2>")))))
#+END_SRC
*** Buttons and links
You can use buttons and links that call specific functions. When you
create a button/link only for a session the created route will be
guarded. Therefore only the user with the associated route may
actually access his button.
#+LATEX: \\\\
For each button there will be an URI like "/buttons/BUTTONID". You can
access buttons via POST only. Links get a URI like "/links/LINKID" and
can be accessed either by GET (get a redirect to the stored link) or
by POST (return only the value of the link). In any case the callback
function gets called - please keep that in mind.
#+LATEX: \\\\
If the return value of the link matches the current path then the side
will be reloaded entirely or, if JavaScript is enabled, the dirty
widgets will be reloaded. Please leave out the starting "/" If you
want to address a target on the localhost. E.g. you are on the page
"/test", then return "test" if you want to stay on it.
#+LATEX: \\\\
The BUTTONID and LINKID are the ID slots of the widget - which is
default a symbol generated by GENSYM. But you can change that by
giving your <CALLBACK-WIDGET> a specific ID (like in the example
below). This will ensure that the route will persist otherwise the
route for the <CALLBACK-WIDGET> will change with every restart of your
website or with every new session (depends on the scope). *Be careful,
the ID must be unique on object level, otherwise you overwrite
routes!*
#+LATEX: \\\\
An example:
#+BEGIN_SRC lisp
(defvar *got-here-by-link* nil)

(defroute "/otherpage" ()
(if *got-here-by-link*
(progn
(setf *got-here-by-link* nil)
"<h1>Got here by pressing the link</h2>")
"<h1>Got here by yourself</h2>"))

(defroute "/link-test" ()
(concatenate ’string
(render-widget
(make-widget :global ’<link-widget>
:label "Github"
:callback #’(lambda (args)
(format t "LOG: Link clicked!") "http://github.com/ritschmaster")
:target-foreign-p t ;; The link goes out of this domain
))
(render-widget
(make-widget :global ’<link-widget>
:label "Otherpage"
:id "otherpage" ;; href="/links/otherpage"
:callback #’(lambda (args)
(setf *got-here-by-link* t) "/otherpage")
:target-foreign-p t ;; The link goes out of this domain
))
(render-widget
(make-widget :global ’<button-widget>
:label "Button"
:callback #’(lambda (args)
(format t
"LOG: Button clicked!"))))))
#+END_SRC

You can create your own callback widgets too. Just look at the
<CALLBACK-WIDGET>, <BUTTON-WIDGET> classes for that.

*** Use caveman2-widgets for your entire HTML document
To make your life really easy you can create an entire HTML
document. You can either tinker your own widgets or whatever with the
<HMTL-DOCUMENT-WIDGET> and the <HEADER-WIDGET> or you can use the
handy WITH-HTML-DOCUMENT macro.

#+BEGIN_SRC lisp
(defclass <root-widget> (<body-widget>)
())

(defmethod render-widget ((this <root-widget>))
"Hello world!")

(defclass <otherpage-widget> (<body-widget>)
())

(defmethod render-widget ((this <otherpage-widget>))
"Hello from the other page!")

(defvar *header-widget* (make-instance ’<header-widget>
;; the title when this header is used
:title "Widgets test"

;; the icon when this header is used
:icon-path "/images/icon.png"

;; the following lines will be rendered in the header: :other-header-content
’("<meta name=\"author\" content=\"Richard Bäck\">"))
(defvar *root-widget* (make-widget :global ’<root-widget>))
(defvar *otherpage-widget* (make-widget :global ’<otherpage-widget>))

(defroute "/" ()
;; The *root-widget* can be accessed under:
;; /rest/root-widget?id=(caveman2-widgets.widget::id *root-widget*)
(render-widget
(make-instance ’<html-document-widget>
;; sets this specific header for this page
:header *header-widget*
:body *root-widget*)))
(defroute "/otherpage" ()
(with-html-document (doc
*header-widget*)
(setf (body doc)
*otherpage-widget*)))

#+END_SRC

*** Marking widgets dirty
You can mark specific widgets as dirty with the function
MARK-DIRTY. This means that they will be reloaded dynamically (if the
user has JavaScript is enabled). Please notice that you can mark *any*
widget as dirty. Therefore you can order JavaScript to reload global
widgets and sessioned widgets.
#+LATEX: \\\\
An example:
#+BEGIN_SRC lisp
(defclass <sessioned-widget> (<widget>)
((enabled
:initform nil
:accessor enabled)))

(defmethod render-widget ((this <sessioned-widget>))
(concatenate ’string
"<h2>Sessioned-widget:</h2>"
(if (enabled this)
"<h3>enabled!</h3>"
"<h3>not enabled</h3>")))

(defclass <my-body-widget> (<widget>)
())

(defmethod render-widget ((this <my-body-widget>))
(concatenate ’string
"<h1>MARK-DIRTY test</h1>"
(render-widget
(get-widget-for-session :sessioned-widget))
(render-widget
(make-widget
:global ’<button-widget>
:label "Enable"
:callback #’(lambda ()
(let ((sessioned-widget
(get-widget-for-session :sessioned-widget)))
(when sessioned-widget
(setf (enabled sessioned-widget) t)
(mark-dirty sessioned-widget))))))
(render-widget
(make-widget
:global ’<button-widget>
:label "Disable"
:callback #’(lambda ()
(let ((sessioned-widget
(get-widget-for-session :sessioned-widget)))
(when sessioned-widget
(setf (enabled sessioned-widget) nil)
(mark-dirty sessioned-widget))))))))

(defvar *header-widget* (make-instance ’<header-widget>
:title "Mark-dirty test"))
(defvar *my-body-widget* (make-widget :global ’<my-body-widget>))

(defroute "/mark-dirty-test" ()
(set-widget-for-session :sessioned-widget (make-widget :session ’<sessioned-widget>))
(render-widget
(make-instance ’<html-document-widget>
:header *header-widget*
:body *my-body-widget*)))
#+END_SRC

*** Navigation objects
You can create navigation objects too! The purpose of navigation
objects is that you don’t have to manage a navigation ever again!
Each navigation object contains another widget which displays the
currently selected path. If you click on a navigation link that object
is changed and refreshed (either via JavaScript or through the
link). Please keep in mind that navigation objects are *session
stateful widgets*.
#+LATEX: \\\\
Paths are only created automatically by the DEFNAV macro. The first
item in the list is the widget which will be displayed at the base
path of the navigation. You can use any string as path but be careful
to not interfere with the special paths of NINGLE
(e.g. "/:some-path"). Do not use those. The only special path you can
use is the wildcard (e.g "/*/").
#+LATEX: \\\\
A very basic example:
#+BEGIN_SRC lisp
(defvar *first-widget*
(make-widget :global ’<string-widget>
:text "<h1>Hello world from first</h1>"))

(defvar *second-widget*
(make-widget :global ’<string-widget>
:text "<h1>Hello world from second</h1>"))

(defclass <proxy-widget> (<widget>)
()
(:documentation "This class enables session based widgets for a
navigation."))

(defmethod render-widget ((this <proxy-widget>))
(set-widget-for-session :string-widget
(make-widget :session ’<string-widget>
:text "hello world"))
(render-widget (get-widget-for-session :string-widget)))

(defnav "/sophisticated/path"
((make-instance ’<header-widget>
:title "Navigation test")
(list
(list "First widget" "first" *first-widget*)
(list "Second widget" "second" *second-widget*)
(list "Third widget" "third" (make-widget :global
’<proxy-widget>))
(list "Hidden widget" "hidden"
(make-widget :global ’<string-widget>
:text "<h1>You have accessed a hidden widget!</h1>")
:hidden))
:kind ’<menu-navigation-widget>))
#+END_SRC

If the default navigation object doesn’t render as you wish, you can
subclass it and overwrite the RENDER-WIDGET method. Please notice that
you can actually very easily adjust the path where the navigation and
its widgets get rendered. The slot BASE-PATH is created for that.
#+LATEX: \\\\
There are two default navigation widgets:
- <MENU-NAVIGATION-WIDGET> :: A navigation with a menu. You can change
the menu appearance with CSS. With the :HIDDEN keyword you can
hide a path from the navigation list.
- <BLANK-NAVIGATION-WIDGET> :: A navigation without any menu. It is
controlled by the URL only - or by other widgets.
*** Table objects
You can create a table very simple. A <TABLE-WIDGET> displays *all*
items which are supplied through the PRODUCER function.
#+LATEX: \\\\
Important for the usage of tables is that you supply a PRODUCER
function. The function should return a list of <TABLE-ITEM>
objects. This function can be anything but it has to take the key
arguments:
- AMOUNT :: Tells how many items to get
- ALREADY :: Tells how many items already received
- LENGTH-P :: A flag which should tell the function to return the
available items if active.
AMOUNT and ALREADY can be seen as synonyms for FROM and TO.
#+LATEX: \\\\
A <TABLE-ITEM> object is needed for tables. The essence of those
objects is that they can be translated to lists through the generic
function GET-AS-LIST. Therefore you don’t have to subclass
<TABLE-ITEM> at all just to add an implementation of GET-AS-LIST for
your used class.
#+LATEX: \\\\
For the <TABLE-Widget> consider the following example:
#+BEGIN_SRC lisp
(defclass <my-item> (<table-item>)
((id
:initarg :id
:reader id)
(name
:initarg :name
:reader name)
(description
:initarg :description
:reader description)))

(defmethod get-as-list ((this <my-item>))
(list :id (id this)
:name (name this)
:description (description this)))

(defun producer (&key
amount
(already 0)
(length-p nil))
(if (null length-p)
(let ((all ’()))
(if (null amount)
(loop for x from 1 to 1000 do
(setf all
(append all
(list
(make-instance ’<my-item>
:id x
:name (format nil "~a" x)
:description (format nil "The ~a. item." x))))))
(loop for x from (+ already 1) to (+ already amount) do
(setf all
(append all
(list
(make-instance ’<my-item>
:id x
:name (format nil "~a" x)
:description (format nil "The ~a. item." x)))))))
all)
1000))

(defvar *table-widget*
(make-widget :global ’<table-widget>
:producer ’producer
:column-descriptions (list
(list :name "Name")
(list :description "Description"))))

(defroute "/table" ()
(with-html-document (doc
(make-instance ’<header-widget>))
(setf (body doc)
*table-widget*)))
#+END_SRC

*** Viewgrids
The <VIEWGRID-WIDGET> is used to display a bulk of heterogenous
items. The items must implement the RENDER-AS method. The
<VIEWGRID-WIDGET> calls RENDER-AS with its VIEW slot. Therefore you
have provide an implementation for the keyword supplied by VIEW in
your <VIEWGRID-WIDGET>.
#+LATEX: \\\\
You can limit the displayed items with the MAX-ITEMS-TO-DISPLAY
slot. If this slot is active the items are delivered on several pages
instead on only one. If you supply additionally the DISPLAY-SELECTOR
with the URI path on which the <VIEWGRID-WIDGET> object is rendered,
then selectable page numbers are displayed on the bottom too.
#+LATEX: \\\\
Each item can be accessed. When accessing the item a specific
given function is called with the item as parameter.
#+LATEX: \\\\
The following example covers all functionality:
#+BEGIN_SRC lisp
(defclass <my-viewgrid-item> (<viewgrid-item>)
((id
:initarg :id
:reader id)
(name
:initarg :name
:reader name)
(description
:initarg :description
:reader description)))

(defmethod render-as ((this <my-viewgrid-item>) (view (eql :short)))
(format nil "<div style=\"padding-bottom:30px\">id: ~a<br>name: ~a<br>desc: ~a<div>"
(id this) (name this) (description this)))

(defun producer (&key
(from 0)
(to nil)
(length-p nil))
(let ((all ’()))
(loop for x from 1 to 35 do
(setf all
(append all
(list
(make-instance ’<my-viewgrid-item>
:id x
:name (format nil "~a" x)
:description (format nil "The ~a. item." x))))))
(cond
(length-p
(length all))
((and from (not to))
(mapcan #’(lambda (item)
(if (>= (id item) from)
(list item)
nil))
all))
((and from to)
(mapcan #’(lambda (item)
(if (and (>= (id item) from) (< (id item) to))
(list item)
nil))
all)))))

(defroute "/viewgrid" ()
(with-html-document (doc
(make-instance ’<header-widget>))
(set-widget-for-session
:viewgrid
(make-widget :session ’<viewgrid-widget>
:producer #’producer
:view :short
:max-items-to-display 11
:display-selector "viewgrid"
:on-view #’(lambda (item)
(format t
(render-as item :short))
"viewgrid")))
(setf (body doc)
(get-widget-for-session :viewgrid))))
#+END_SRC
*** Forms
Forms can be pretty annoying but with the <FORM-WIDGET> you don’t have
to care for anything but for the naming of the inputs ever again. Each
<FORM-WIDGET> consists of 0 to n <FORM-FIELD> objects. If you have 0
<FORM-FIELD> objects it essentially only behaves like a
<BUTTON-WIDGET>.
#+LATEX: \\\\
<FORM-FIELD> is the base class for fields. Fields can be:
- <INPUT-FIELD> :: Is basically an abstraction of the HTML input-tag.
- <SELECT-FIELD> :: Consists of <OPTION-FIELD> objects.

Of course you can implement your own <FORM-FIELD> classes too! But
keep in mind that *the default <FORM-FIELD> already implements
constraints*.
#+LATEX: \\\\
To understand how constraints for forms work an examination of the
available slots for <FORM-FIELD> objects is necessary:
- REQUIRED :: A non-nil value indicates that this field has to have
some value.
- SUPPLIED :: Will be set NIL by SET-REQUIRED-PRESENT and set T by
RENDER-WIDGET. It is NIL if the field is not supplied
and is therefore not dependent on REQUIRED. It should
tell the server whether an parameter was passed or not.
- CHECK-FUNCTION :: Will be called by SET-REQUIRED-PRESENT and check
if the passed value by the client is "correct". It
is a lambda with one argument, which is the passed
string from the client. Should return NIL if the
passed string was not correct and a non-nil value
otherwise.
- ERROR-HAPPENED :: Will be set to T by SET-REQUIRED-PRESENT if the
CHECK-FUNCTION did not succeed. The rendering the
form will set it to NIL again.
- ERROR-MESSAGE :: The message that will be displayed if
ERROR-HAPPENED is T.

You don’t have to actually care for that procedure as the
<FORM-WIDGET> calls this the SET-REQUIRED-PRESENT by itself. But it
can be helpful to understand the entire process of checking the user
input. The only thing to really memorize here is that *the given
callback only gets called if all required fields where supplied and
those fields where supplied correctly*.
#+LATEX: \\\\
Consider the following example for additional help:
#+BEGIN_SRC lisp
(defvar *password-field*
(make-instance ’<input-field>
:input-type "password"
:check-function
#’(lambda (pass)
(if (<= (length pass)
2)
nil
t))
:error-message "Has to be longer than 2"
:name "password"
:value ""))

(defvar *form-widget*
(let ((text-field (make-instance ’<input-field>
:input-type "text"
:name "text"
:value ""
:required t))
(choice-field (make-instance
’<select-field>
:name "selection"
:options
(list (make-instance ’<option-field>
:value "first")
(make-instance ’<option-field>
:value "second"
:display-value "Other")))))
(make-widget :global ’<form-widget>
:input-fields (list
text-field
*password-field*
choice-field)
:label "Submit"
:callback
#’(lambda (args)
(format t "received correct values:
~a
————-"
args)))))

(defroute "/form" ()
(with-html-document (doc
(make-instance ’<header-widget>))
(setf (body doc)
*form-widget*)))
#+END_SRC
*** Protecting widgets
This library also enables you to protect widgets. Each widget has an
associated list of keywords which indicate the levels/circles of
authorization an requester needs.
#+LATEX: \\\\
By default the protection is an empty list (therefore NIL), which
means that everybody can access your widget. If the protection is
non-nil the non-nil value is a list of keywords which refers to a list
of keywords stored in the session. So if the session contains the
required keyword in its list the requester can access the
widget. Otherwise he is denied (throws a 403 code).
#+LATEX: \\\\
The <WIDGET> class holds the PROTECTED slot. This slots value
indicates the needed token in the session. But caveman2-widgets
supplies an additional, specific *PROTECT-WIDGET* method which should be
used. You can supply the following parameters:
- :LOGIN :: Protects the widget by the default login-widget
- A keyword in general :: Protects the widget with this keyword (adds
it)
- A list of keywords :: Protects the widget with this keywords (adds
them)

#+BEGIN_SRC lisp
(defvar *specific-protected-widget*
(protect-widget
(make-widget :global ’<string-widget>
:text "<h1>This is a protected text</h1>")
:myprotection))

;; Should throw 403
(defroute "/protected-widget" ()
(concatenate ’string
"<a href=\"/rest/string-widget?id="
(id *specific-protected-widget*)
"\">Will throw 403</a>"

(render-widget *specific-protected-widget*)))

(defmethod on-exception ((app <web>) (code (eql 403)))
(declare (ignore app))
"403 - The protection works.")
#+END_SRC

*** Login
Protecting certain widgets by a login is very easy. The <LOGIN-WIDGET>
organizes the following things:
1. It displays a login form and logs the client in if he passes the
challenge. The successful pass sets will result in an permanent
non-nil value if you call "(LOGGED-IN *SESSION*)". This means that
every widget that requires the authroization level :LOGIN through
the PROTECT-WIDGET method can now be accessed by the user.
2. It supplies a Logout button. This button can be access through the
LOGOUT-BUTTON reader. You therefore can render the button anywhere
you like. Pressing the button will result in a logout and therefore
in a permanent NIL for "(LOGGED-IN *SESSION*)".
3. It renders certain widgets if the login was successful. This can be
either used e.g. for a success message.

*The <LOGIN-WIDGET> has to run in :SESSION scope!*
#+LATEX: \\\\
Additionally you can specify different authentication challanges
(authentication functions) if you wish. But using the <LOGIN-WIDGET>
and passing the challenge will *only* set the authoriatzition level
to :LOGIN. This means that you need to create your own <LOGIN-WIDGET>
if you want some other level for different authentication functions!

#+BEGIN_SRC lisp
(defvar *protected-widget*
(protect-widget
(make-widget :global ’<string-widget>
:text "<h1>This is a protected text</h1>")
:login))

(defroute "/" ()
(with-html-document (doc
(make-instance ’<header-widget>))
(setf (body doc)
(make-widget
:global ’<function-widget>
:function
#’(lambda ()
(set-widget-for-session ;; running it in the session
:login-widget
(make-widget :session ’<login-widget>
:authenticator
#’(lambda (user password)
(if (and (string= user "ritschmaster")
(string= password "secret"))
t
nil))
:widgets
(list
*protected-widget*)))
(render-widget
(get-widget-for-session :login-widget)))))))
#+END_SRC
*** Language getting/setting
To store the accpeted languages in the session there is the
CHECK-AND-SET-LANGUAGE function. This function uses the value supplied
through the "Accept-languages" field in the HTTP request. It gets
called through the render method by any <HTML-DOCUMENT-WIDGET>
automatically. Which means that as soon as you use it you don’t have
to worry about getting the language. But on the other hand you have to
make sure that every subclass of <HTML-DOCUMENT-WIDGET> again uses
CHECK-AND-SET-LANGUAGE in its render-method.
#+LATEX: \\\\
You can access the currently accepted languages through the
ACCEPTED-LANGUAGES.
#+LATEX: \\\\
If you rather use a manual language chooser you can supply
AUTOMATICALLY-SET-LANGUAGES as NIL to the INIT-WIDGETS
function. Please then use the setf method for ACCEPTED-LANGUAGES to
set the language.
*** Translations
Most strings that are rendered human readable get translated through a
special function. You can specify your own translation function by
passing it to INIT-WIDGETS as :TRANSLATION-FUNCTION. The function
header should look like this:
#+BEGIN_SRC lisp
(defvar *my-translation-function*
#’(lambda (text
&key
plural-p
genitive-form-p
items-count
accusative-form-p
language
&allow-other-keys)
text))
#+END_SRC

Strings that are translated:
- The page names of a navigation

Strings that are definitely *not* translated:
- The TEXT of a <STRING-WIDGET>
- The return value of a <FUNCTION-WIDGET>

*** Development hooks
In case you want to do things at compile time (e.g. calling DEFROUTE)
whe INIT-WIDGETS is evaluated there is the variable
*INIT-WIDGETS-HOOKS*. Just append new functions as you wish.

#+BEGIN_SRC lisp
(setf *init-widgets-hooks*
(append
*init-widgets-hooks*
(list
#’(lambda ()
(defroute "/something" ()
;; Accessing the user supplied <APP> object:
(describe caveman2-widgets::*web*)
"something")))))
#+END_SRC
** Important notes/Things that happen automatically
The following things you should keep in mind when using
caveman2-widgets.

*** Automatically REST API creation
If you create a widget then routes for a REST API will be added
automatically. Suppose you subclass <WIDGET> with the class
<MY-WIDGET>, then you will get the path "/rest/my-widget" which you
can access.

#+BEGIN_SRC lisp
(defclass <my-widget> (<widget>)
())

(defmethod render-widget ((this <my-widget>))
"my-widget representation for the website")

(defmethod render-widget-rest ((this <my-widget>) (method (eql :get)) (args t))
"my-widget representation for the REST.")

(defmethod render-widget-rest ((this <my-widget>) (method (eql :post)) (args t))
(render-widget this))
#+END_SRC

Buttons and Links are *not* accessed through the REST path (see the
section above).

Widgets that are not accessible through the REST:
- <HTML-DOCUMENT-WIDGET>
- <HEADER-WIDGET>

*** Encapsulating widgets with divs
Each widget gets wrapped in a div automatically. Every widget will get
its entire class heritage included in the CSS class
attribute. Therefore you can access every widget (and derived widget)
very easily with CSS.

*** JavaScript dependencies
When <HEADER-WIDGET> is used all JavaScript dependencies are added
automatically. Please notice that these dependecies are needed to
ensure that the widgets work properly. If you don’t want to use
<HEADER-WIDGET> you have to manually add jQuery and all the JavaScript
Code supplied/needed by caveman2-widgets.

The routes for the JavaScript files (which have to be included in each
HTML file) are:
- /widgets/js/widgets.js

The jQuery-Version used is 2.2.2 minified. If you want another jQuery
file you can specify it with the variable \*jquery-cdn-link\* (should be
an URL).

*If you forget to use the JavaScript-files widgets might not work or
even break. Most likely all dynamic content just won’t work
(automatically fallback to non-JS)*

*** CSS dependencies
As with JavaScript, stylesheets are added in the <HEADER-WIDGET> automatically
too. The routes you need in your head tag are:
- /widgets/css/widgets.css

*** Session values
This section should inform you about keywords in the session variable
which you should absolutely not modify.
- :WIDGET-HOLDER :: <WIDGET-HOLDER> object. It holds all the session
scoped widgets.
- :DIRTY-OBJECT-IDS :: The name says it all.
- :JAVASCRIPT-AVAILABLE :: Holds a boolean value if JavaScript is
available or not.
- :ACCEPT-LANGUAGE :: Holds the languages accepted by the client.

** Author

+ Richard Paul Bäck (richard.baeck@free-your-pc.com)

** Copyright

Copyright (c) 2016 Richard Paul Bäck (richard.baeck@free-your-pc.com)

** License

Licensed under the LLGPL License.

Version

0.5

Dependencies

• trivial-garbage
• moptilities
• caveman2

Source

caveman2-widgets.asd (file)

Component

src (module)

3 Modules

Modules are listed depth-first from the system components tree.

3.1 caveman2-widgets/src

Parent

caveman2-widgets (system)

Location

src/

Components

• util.lisp (file)
• widget.lisp (file)
• callback-widget.lisp (file)
• default-widgets.lisp (file)
• login.lisp (file)
• document.lisp (file)
• navigation.lisp (file)
• caveman2-widgets.lisp (file)

4 Files

Files are sorted by type and then listed depth-first from the systems components trees.

4.1 Lisp

4.1.1 caveman2-widgets.asd

Location

caveman2-widgets.asd

Systems

caveman2-widgets (system)

4.1.2 caveman2-widgets/src/util.lisp

Parent

src (module)

Location

src/util.lisp

Packages

caveman2-widgets.util

Exported Definitions

• *application-root* (special variable)
• *automatically-set-languages* (special variable)
• *css-directory* (special variable)
• *js-directory* (special variable)
• *language-key-in-session* (special variable)
• *static-directory* (special variable)
• +translate+ (special variable)
• accepted-languages (generic function)
• accepted-languages (method)
• (setf accepted-languages) (method)
• (setf accepted-languages) (generic function)
• append-item (generic function)
• append-item (method)
• check-and-set-language (function)
• clean-list-of-broken-links (function)
• defroute-static (function)
• delete-item (generic function)
• delete-item (method)
• find-item (generic function)
• find-item (method)
• get-trimmed-class-name (function)
• get-value-for-cons-list (function)
• has-trailing-slash (function)
• javascript-available (generic function)
• javascript-available (method)
• (setf javascript-available) (method)
• (setf javascript-available) (generic function)
• string-case-insensitive= (function)

4.1.3 caveman2-widgets/src/widget.lisp

Parent

src (module)

Location

src/widget.lisp

Packages

caveman2-widgets.widget

Exported Definitions

• *css-path* (special variable)
• *dirty-objects-uri-path* (special variable)
• *javascript-checker-path* (special variable)
• *javascript-path* (special variable)
• *protection-circles-session-key* (special variable)
• *rest-path* (special variable)
• *web* (special variable)
• *widgets-css-filename* (special variable)
• *widgets-js-filename* (special variable)
• <widget> (class)
• add-authorization (function)
• append-item (method)
• append-item (method)
• authorized (function)
• delete-item (method)
• delete-item (method)
• find-item (method)
• get-widget-for-session (function)
• id (method)
• init-mark-dirty (function)
• make-widget (macro)
• mark-dirty (function)
• protect-widget (generic function)
• protect-widget (method)
• protect-widget (method)
• protected (method)
• remove-authorization (function)
• remove-widget-for-session (function)
• render-widget (generic function)
• render-widget (method)
• render-widget-body (generic function)
• render-widget-header (generic function)
• render-widget-rest (generic function)
• render-widget-rest (method)
• render-widget-rest (method)
• set-widget-for-session (function)
• widget-scope (method)

Internal Definitions

• *dirty-objects-session-key* (special variable)
• *global-widget-holder* (special variable)
• *rest-methods* (special variable)
• <dirty-widget-holder> (class)
• <widget-holder> (class)
• demark-dirty (function)

4.1.4 caveman2-widgets/src/callback-widget.lisp

Parent

src (module)

Location

src/callback-widget.lisp

Packages

caveman2-widgets.callback-widget

Exported Definitions

• *button-call-path* (special variable)
• *link-call-path* (special variable)
• <button-widget> (class)
• <callback-widget> (class)
• <form-field> (class)
• <form-widget> (class)
• <input-field> (class)
• <link-widget> (class)
• <option-field> (class)
• <radio-field> (class)
• <select-field> (class)
• append-item (method)
• append-item (method)
• append-item (method)
• callback (method)
• check-function (method)
• (setf check-function) (method)
• checked-option (method)
• (setf checked-option) (method)
• classes (method)
• (setf classes) (method)
• error-happened (method)
• (setf error-happened) (method)
• error-message (method)
• (setf error-message) (method)
• get-from-callback-args (function)
• http-method (method)
• input-fields (method)
• input-type (method)
• label (method)
• (setf label) (method)
• label (method)
• multiple (method)
• (setf multiple) (method)
• name (method)
• options (method)
• (setf options) (method)
• options (method)
• (setf options) (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• required (method)
• (setf required) (method)
• supplied (method)
• (setf supplied) (method)
• uri-path (method)
• value (method)
• value (method)

Internal Definitions

• *input-field-for-old-uri* (special variable)
• display-value (method)
• set-required-present (generic function)
• set-required-present (method)
• test-widget-if-session (function)

4.1.5 caveman2-widgets/src/default-widgets.lisp

Parent

src (module)

Location

src/default-widgets.lisp

Packages

caveman2-widgets.default-widgets

Exported Definitions

• <border-widget> (class)
• <composite-widget> (class)
• <function-widget> (class)
• <hcomposite-widget> (class)
• <string-widget> (class)
• <table-item> (class)
• <table-widget> (class)
• <viewgrid-item> (class)
• <viewgrid-widget> (class)
• append-item (method)
• append-item (method)
• column-descriptions (method)
• east (method)
• (setf east) (method)
• fn (method)
• (setf fn) (method)
• get-as-list (generic function)
• get-as-list (method)
• max-items-to-display (method)
• (setf max-items-to-display) (method)
• north (method)
• (setf north) (method)
• on-view (method)
• (setf on-view) (method)
• on-view-label (method)
• (setf on-view-label) (method)
• render-as (generic function)
• render-as (method)
• render-as (method)
• render-as (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget-body (method)
• render-widget-header (method)
• south (method)
• (setf south) (method)
• text (method)
• (setf text) (method)
• view (method)
• (setf view) (method)
• west (method)
• (setf west) (method)
• widgets (method)
• (setf widgets) (method)

Internal Definitions

• center (method)
• (setf center) (method)
• display-selector (method)
• (setf display-selector) (method)
• producer (method)
• producer (method)

4.1.6 caveman2-widgets/src/login.lisp

Parent

src (module)

Location

src/login.lisp

Packages

caveman2-widgets.login

Exported Definitions

• *login-authentication-keyword* (special variable)
• <login-widget> (class)
• logged-in (generic function)
• logged-in (method)
• (setf logged-in) (method)
• (setf logged-in) (generic function)
• login-authenticator (method)
• login-form (method)
• logout-button (method)
• render-widget (method)
• signout-hook (method)
• (setf signout-hook) (method)

Internal Definitions

• login-failed (method)
• (setf login-failed) (method)

4.1.7 caveman2-widgets/src/document.lisp

Parent

src (module)

Location

src/document.lisp

Packages

caveman2-widgets.document

Exported Definitions

• *jquery-cdn-link* (special variable)
• <css-file> (class)
• <header-widget> (class)
• <html-document-widget> (class)
• <js-file> (class)
• append-item (method)
• append-item (method)
• append-item (method)
• body (method)
• (setf body) (method)
• bottom (method)
• (setf bottom) (method)
• charset (method)
• (setf charset) (method)
• crossorigin (method)
• (setf crossorigin) (method)
• header (method)
• (setf header) (method)
• icon-path (method)
• (setf icon-path) (method)
• other-header-content (method)
• path (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• title (method)
• (setf title) (method)
• with-html-document (macro)

Internal Definitions

• <file> (class)
• css-files (method)
• integrity (method)
• (setf integrity) (method)
• js-files (method)

4.1.8 caveman2-widgets/src/navigation.lisp

Parent

src (module)

Location

src/navigation.lisp

Packages

caveman2-widgets.navigation

Exported Definitions

• *port* (special variable)
• <blank-navigation-widget> (class)
• <menu-navigation-widget> (class)
• append-item (method)
• base-path (method)
• (setf base-path) (method)
• composite (method)
• (setf composite) (method)
• current-page (method)
• (setf current-page) (generic function)
• (setf current-page) (method)
• defnav (macro)
• find-item (method)
• pages (method)
• render-widget (method)
• render-widget (method)
• session-tag (method)
• (setf session-tag) (method)

Internal Definitions

• *navigation-widgets* (special variable)
• <navigation-widget> (class)
• created-paths (method)
• (setf created-paths) (method)

4.1.9 caveman2-widgets/src/caveman2-widgets.lisp

Parent

src (module)

Location

src/caveman2-widgets.lisp

Packages

caveman2-widgets

Exported Definitions

• *init-widgets-hooks* (special variable)
• init-widgets (function)

5 Packages

Packages are listed by definition order.

5.1 caveman2-widgets.util

Source

util.lisp (file)

Use List

• caveman2
• metabang.moptilities
• common-lisp

Used By List

• caveman2-widgets
• caveman2-widgets.navigation
• caveman2-widgets.document
• caveman2-widgets.login
• caveman2-widgets.default-widgets
• caveman2-widgets.callback-widget
• caveman2-widgets.widget

Exported Definitions

• *application-root* (special variable)
• *automatically-set-languages* (special variable)
• *css-directory* (special variable)
• *js-directory* (special variable)
• *language-key-in-session* (special variable)
• *static-directory* (special variable)
• +translate+ (special variable)
• accepted-languages (generic function)
• accepted-languages (method)
• (setf accepted-languages) (method)
• (setf accepted-languages) (generic function)
• append-item (generic function)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• append-item (method)
• check-and-set-language (function)
• clean-list-of-broken-links (function)
• defroute-static (function)
• delete-item (generic function)
• delete-item (method)
• delete-item (method)
• delete-item (method)
• find-item (generic function)
• find-item (method)
• find-item (method)
• find-item (method)
• get-trimmed-class-name (function)
• get-value-for-cons-list (function)
• has-trailing-slash (function)
• javascript-available (generic function)
• javascript-available (method)
• (setf javascript-available) (method)
• (setf javascript-available) (generic function)
• string-case-insensitive= (function)

5.2 caveman2-widgets.widget

Source

widget.lisp (file)

Use List

• caveman2-widgets.util
• caveman2
• common-lisp

Used By List

• caveman2-widgets
• caveman2-widgets.navigation
• caveman2-widgets.document
• caveman2-widgets.login
• caveman2-widgets.default-widgets
• caveman2-widgets.callback-widget

Exported Definitions

• *css-path* (special variable)
• *dirty-objects-uri-path* (special variable)
• *javascript-checker-path* (special variable)
• *javascript-path* (special variable)
• *protection-circles-session-key* (special variable)
• *rest-path* (special variable)
• *web* (special variable)
• *widgets-css-filename* (special variable)
• *widgets-js-filename* (special variable)
• <widget> (class)
• add-authorization (function)
• authorized (function)
• get-widget-for-session (function)
• id (generic function)
• id (method)
• init-mark-dirty (function)
• make-widget (macro)
• mark-dirty (function)
• protect-widget (generic function)
• protect-widget (method)
• protect-widget (method)
• protected (generic function)
• protected (method)
• remove-authorization (function)
• remove-widget-for-session (function)
• render-widget (generic function)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget (method)
• render-widget-body (generic function)
• render-widget-body (method)
• render-widget-header (generic function)
• render-widget-header (method)
• render-widget-rest (generic function)
• render-widget-rest (method)
• render-widget-rest (method)
• set-widget-for-session (function)
• widget-scope (generic function)
• widget-scope (method)

Internal Definitions

• *dirty-objects-session-key* (special variable)
• *global-widget-holder* (special variable)
• *rest-methods* (special variable)
• <dirty-widget-holder> (class)
• <widget-holder> (class)
• demark-dirty (function)

5.3 caveman2-widgets.callback-widget

Source

callback-widget.lisp (file)

Use List

• caveman2-widgets.widget
• caveman2-widgets.util
• caveman2
• common-lisp

Used By List

• caveman2-widgets
• caveman2-widgets.navigation
• caveman2-widgets.login
• caveman2-widgets.default-widgets

Exported Definitions

• *button-call-path* (special variable)
• *link-call-path* (special variable)
• <button-widget> (class)
• <callback-widget> (class)
• <form-field> (class)
• <form-widget> (class)
• <input-field> (class)
• <link-widget> (class)
• <option-field> (class)
• <radio-field> (class)
• <select-field> (class)
• callback (generic function)
• callback (method)
• check-function (generic function)
• check-function (method)
• (setf check-function) (method)
• (setf check-function) (generic function)
• checked-option (generic function)
• checked-option (method)
• (setf checked-option) (method)
• (setf checked-option) (generic function)
• classes (generic function)
• classes (method)
• (setf classes) (method)
• (setf classes) (generic function)
• error-happened (generic function)
• error-happened (method)
• (setf error-happened) (method)
• (setf error-happened) (generic function)
• error-message (generic function)
• error-message (method)
• (setf error-message) (method)
• (setf error-message) (generic function)
• get-from-callback-args (function)
• http-method (generic function)
• http-method (method)
• input-fields (generic function)
• input-fields (method)
• input-type (generic function)
• input-type (method)
• label (generic function)
• label (method)
• (setf label) (method)
• label (method)
• (setf label) (generic function)
• multiple (generic function)
• multiple (method)
• (setf multiple) (method)
• (setf multiple) (generic function)
• name (generic function)
• name (method)
• options (generic function)
• options (method)
• (setf options) (method)
• options (method)
• (setf options) (method)
• (setf options) (generic function)
• required (generic function)
• required (method)
• (setf required) (method)
• (setf required) (generic function)
• supplied (generic function)
• supplied (method)
• (setf supplied) (method)
• (setf supplied) (generic function)
• uri-path (generic function)
• uri-path (method)
• value (generic function)
• value (method)
• value (method)

Internal Definitions

• *input-field-for-old-uri* (special variable)
• display-value (generic function)
• display-value (method)
• set-required-present (generic function)
• set-required-present (method)
• test-widget-if-session (function)

5.4 caveman2-widgets.default-widgets

Source

default-widgets.lisp (file)

Use List

• caveman2-widgets.callback-widget
• caveman2-widgets.widget
• caveman2-widgets.util
• caveman2
• common-lisp

Used By List

• caveman2-widgets
• caveman2-widgets.navigation
• caveman2-widgets.login

Exported Definitions

• <border-widget> (class)
• <composite-widget> (class)
• <function-widget> (class)
• <hcomposite-widget> (class)
• <string-widget> (class)
• <table-item> (class)
• <table-widget> (class)
• <viewgrid-item> (class)
• <viewgrid-widget> (class)
• column-descriptions (generic function)
• column-descriptions (method)
• east (generic function)
• east (method)
• (setf east) (method)
• (setf east) (generic function)
• fn (generic function)
• fn (method)
• (setf fn) (method)
• (setf fn) (generic function)
• get-as-list (generic function)
• get-as-list (method)
• max-items-to-display (generic function)
• max-items-to-display (method)
• (setf max-items-to-display) (method)
• (setf max-items-to-display) (generic function)
• north (generic function)
• north (method)
• (setf north) (method)
• (setf north) (generic function)
• on-view (generic function)
• on-view (method)
• (setf on-view) (method)
• (setf on-view) (generic function)
• on-view-label (generic function)
• on-view-label (method)
• (setf on-view-label) (method)
• (setf on-view-label) (generic function)
• render-as (generic function)
• render-as (method)
• render-as (method)
• render-as (method)
• south (generic function)
• south (method)
• (setf south) (method)
• (setf south) (generic function)
• text (generic function)
• text (method)
• (setf text) (method)
• (setf text) (generic function)
• view (generic function)
• view (method)
• (setf view) (method)
• (setf view) (generic function)
• west (generic function)
• west (method)
• (setf west) (method)
• (setf west) (generic function)
• widgets (generic function)
• widgets (method)
• (setf widgets) (method)
• (setf widgets) (generic function)

Internal Definitions

• center (generic function)
• center (method)
• (setf center) (method)
• (setf center) (generic function)
• display-selector (generic function)
• display-selector (method)
• (setf display-selector) (method)
• (setf display-selector) (generic function)
• producer (generic function)
• producer (method)
• producer (method)

5.5 caveman2-widgets.login

Source

login.lisp (file)

Use List

• caveman2-widgets.callback-widget
• caveman2-widgets.default-widgets
• caveman2-widgets.widget
• caveman2-widgets.util
• caveman2
• common-lisp

Used By List

caveman2-widgets

Exported Definitions

• *login-authentication-keyword* (special variable)
• <login-widget> (class)
• logged-in (generic function)
• logged-in (method)
• (setf logged-in) (method)
• (setf logged-in) (generic function)
• login-authenticator (generic function)
• login-authenticator (method)
• login-form (generic function)
• login-form (method)
• logout-button (generic function)
• logout-button (method)
• signout-hook (generic function)
• signout-hook (method)
• (setf signout-hook) (method)
• (setf signout-hook) (generic function)

Internal Definitions

• login-failed (generic function)
• login-failed (method)
• (setf login-failed) (method)
• (setf login-failed) (generic function)

5.6 caveman2-widgets.document

Source

document.lisp (file)

Use List

• caveman2-widgets.widget
• caveman2-widgets.util
• caveman2
• common-lisp

Used By List

• caveman2-widgets
• caveman2-widgets.navigation

Exported Definitions

• *jquery-cdn-link* (special variable)
• <css-file> (class)
• <header-widget> (class)
• <html-document-widget> (class)
• <js-file> (class)
• body (generic function)
• body (method)
• (setf body) (method)
• (setf body) (generic function)
• bottom (generic function)
• bottom (method)
• (setf bottom) (method)
• (setf bottom) (generic function)
• charset (generic function)
• charset (method)
• (setf charset) (method)
• (setf charset) (generic function)
• crossorigin (generic function)
• crossorigin (method)
• (setf crossorigin) (method)
• (setf crossorigin) (generic function)
• header (generic function)
• header (method)
• (setf header) (method)
• (setf header) (generic function)
• icon-path (generic function)
• icon-path (method)
• (setf icon-path) (method)
• (setf icon-path) (generic function)
• other-header-content (generic function)
• other-header-content (method)
• path (generic function)
• path (method)
• title (generic function)
• title (method)
• (setf title) (method)
• (setf title) (generic function)
• with-html-document (macro)

Internal Definitions

• <file> (class)
• css-files (generic function)
• css-files (method)
• integrity (generic function)
• integrity (method)
• (setf integrity) (method)
• (setf integrity) (generic function)
• js-files (generic function)
• js-files (method)

5.7 caveman2-widgets.navigation

Source

navigation.lisp (file)

Use List

• caveman2-widgets.document
• caveman2-widgets.callback-widget
• caveman2-widgets.default-widgets
• caveman2-widgets.widget
• caveman2-widgets.util
• common-lisp

Used By List

caveman2-widgets

Exported Definitions

• *port* (special variable)
• <blank-navigation-widget> (class)
• <menu-navigation-widget> (class)
• base-path (generic function)
• base-path (method)
• (setf base-path) (method)
• (setf base-path) (generic function)
• composite (generic function)
• composite (method)
• (setf composite) (method)
• (setf composite) (generic function)
• current-page (generic function)
• current-page (method)
• (setf current-page) (generic function)
• (setf current-page) (method)
• defnav (macro)
• pages (generic function)
• pages (method)
• session-tag (generic function)
• session-tag (method)
• (setf session-tag) (method)
• (setf session-tag) (generic function)

Internal Definitions

• *navigation-widgets* (special variable)
• <navigation-widget> (class)
• created-paths (generic function)
• created-paths (method)
• (setf created-paths) (method)
• (setf created-paths) (generic function)

5.8 caveman2-widgets

Source

caveman2-widgets.lisp (file)

Use List

• caveman2-widgets.navigation
• caveman2-widgets.document
• caveman2-widgets.login
• caveman2-widgets.callback-widget
• caveman2-widgets.default-widgets
• caveman2-widgets.widget
• caveman2-widgets.util
• caveman2
• common-lisp

Exported Definitions

• *init-widgets-hooks* (special variable)
• init-widgets (function)

6 Definitions

Definitions are sorted by export status, category, package, and then by lexicographic order.

6.1 Exported definitions

6.1.1 Special variables

Special Variable: *application-root*

Package

caveman2-widgets.util

Source

util.lisp (file)

Special Variable: *automatically-set-languages*

Package

caveman2-widgets.util

Source

util.lisp (file)

Special Variable: *button-call-path*

Package

caveman2-widgets.callback-widget

Source

callback-widget.lisp (file)

Special Variable: *css-directory*

Package

caveman2-widgets.util

Source

util.lisp (file)

Special Variable: *css-path*

An absolute route where caveman2-widgets’ CSS files can be accessed.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *dirty-objects-uri-path*

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *init-widgets-hooks*

This variable holds a list of functions which will be called when INIT-WIDGETS is evaluated. You add any function you like but the main idea was to add functions from caveman2-widgets based libraries/applications that need those variables at compile time.

Package

caveman2-widgets

Source

caveman2-widgets.lisp (file)

Special Variable: *javascript-checker-path*

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *javascript-path*

An absolute path where caveman2-widgets’ JavaScript files can be accessed.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *jquery-cdn-link*

The URL to access jQuery.

Package

caveman2-widgets.document

Source

document.lisp (file)

Special Variable: *js-directory*

Package

caveman2-widgets.util

Source

util.lisp (file)

Special Variable: *language-key-in-session*

Package

caveman2-widgets.util

Source

util.lisp (file)

Special Variable: *link-call-path*

Package

caveman2-widgets.callback-widget

Source

callback-widget.lisp (file)

Special Variable: *login-authentication-keyword*

This variable holds the keyword which is used within the session to indicated that a session holder is logged in (or not).

Package

caveman2-widgets.login

Source

login.lisp (file)

Special Variable: *port*

Package

caveman2-widgets.navigation

Source

navigation.lisp (file)

Special Variable: *protection-circles-session-key*

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *rest-path*

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *static-directory*

Package

caveman2-widgets.util

Source

util.lisp (file)

Special Variable: *web*

An <app>-instance

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *widgets-css-filename*

The filename of the CSS file which manages all standard widget styles.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: *widgets-js-filename*

The filename of the JavaScript file which manages all standard widget functionality.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Special Variable: +translate+

This should be a function which should translate a given text. You can modify it to your needs. By default this function does nothing.

@param plural-p
@param genitive-form-p
@param items-count
@param accusative-form-p
@param language

Package

caveman2-widgets.util

Source

util.lisp (file)

6.1.2 Macros

Macro: defnav BASE-PATH (HEADER-WIDGET PAGES &key KIND BOTTOM-WIDGET SESSION-KEY)

@param base-path The path for the navigation. Should have a starting "/". @param header-widget A <HEADER-WIDGET> for the navigation and it’s children. @param pages A list of lists.

Package

caveman2-widgets.navigation

Source

navigation.lisp (file)

Macro: make-widget SCOPE CLASS &rest OBJ-ARGS

@param obj-args The parameter which are passed to the constructor for the new widget.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Macro: with-html-document (DOCUMENT-SYMBOL HEADER &key DOC-KIND) &rest BODY

@param document-symbol The symbol name to access the document. @param doc-kind The class which is used as HTML document. @param header A <HEADER-WIDGET> for this document.

Package

caveman2-widgets.document

Source

document.lisp (file)

6.1.3 Functions

Function: add-authorization CIRCLE &optional SESSION

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: authorized WIDGET &optional SESSION

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: check-and-set-language REQUEST SESSION

Package

caveman2-widgets.util

Source

util.lisp (file)

Function: clean-list-of-broken-links SOME-LIST

Package

caveman2-widgets.util

Source

util.lisp (file)

Function: defroute-static URI-PATH PATH APP CONTENT-TYPE

Package

caveman2-widgets.util

Source

util.lisp (file)

Function: get-from-callback-args KEY ARGS

@param key A string which might be in the args
@param args The value passed by a <CALLBACK-WIDGET> in its callback function.

Package

caveman2-widgets.callback-widget

Source

callback-widget.lisp (file)

Function: get-trimmed-class-name OBJ &key GET-ALL

@param obj The object of which the name is required @param get-all-self If non-nil returns the entire hierarchy.

Package

caveman2-widgets.util

Source

util.lisp (file)

Function: get-value-for-cons-list SOME-LIST KEY

Package

caveman2-widgets.util

Source

util.lisp (file)

Function: get-widget-for-session SESSION-TAG &optional SESSION

Gets a previously saved widget from the session variable (e.g. to render it).

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: has-trailing-slash STR

Package

caveman2-widgets.util

Source

util.lisp (file)

Function: init-mark-dirty WEB &optional URI-PATH

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: init-widgets WEBAPP &key PORT TRANSLATION-FUNCTION JAVASCRIPT-PATH CSS-PATH REST-PATH BUTTON-CALL-PATH LINK-CALL-PATH DIRTY-OBJECTS-URI-PATH LOGIN-AUTHENTICATION-KEYWORD AUTOMATICALLY-SET-LANGUAGES

Package

caveman2-widgets

Source

caveman2-widgets.lisp (file)

Function: mark-dirty WIDGET &optional SESSION

Marks a widget that it should be rendered ASAP.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: remove-authorization CIRCLE &optional SESSION

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: remove-widget-for-session SESSION-TAG &optional SESSION

Removes a saved widget from the session variable.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: set-widget-for-session SESSION-TAG WIDGET &optional SESSION &key FORCE

Saves a widget in the session variable. This should be considered ONLY for session scoped widgets. Only adds WIDGET if there is no widget at SESSION-TAG already.

@param force If non-nil overwrites the already stored value.

@return The current value in the SESSION at position SESSION-TAG.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Function: string-case-insensitive= STR1 STR2

Package

caveman2-widgets.util

Source

util.lisp (file)

6.1.4 Generic functions

Generic Function: accepted-languages SESSION

Generic Function: (setf accepted-languages) VALUE SESSION

Package

caveman2-widgets.util

Source

util.lisp (file)

Methods

Method: accepted-languages (SESSION hash-table)

Method: (setf accepted-languages) VALUE (SESSION hash-table)

Generic Function: append-item THIS ITEM

Package

caveman2-widgets.util

Source

util.lisp (file)

Methods

Method: append-item (THIS <navigation-widget>) (ITEM list)

@param item This should be a list which should looke like that: (list "pagetitle" "uri-path" <widget-for-pagetitle>).

Source

navigation.lisp (file)

Method: append-item (THIS <header-widget>) (ITEM string)

The given item will be added to the <head> tag as given.

Source

document.lisp (file)

Method: append-item (THIS <header-widget>) (ITEM <css-file>)

Source

document.lisp (file)

Method: append-item (THIS <header-widget>) (ITEM <js-file>)

Source

document.lisp (file)

Method: append-item (THIS <table-widget>) (ITEM cons)

@param item Must not have more than two values. The first value is the keyword which should be displayed when a <TABLE-ITEM> object is accessed. The second value is the header text for the column.

Source

default-widgets.lisp (file)

Method: append-item (THIS <composite-widget>) (ITEM <widget>)

Source

default-widgets.lisp (file)

Method: append-item (THIS <form-widget>) (ITEM <form-field>)

Source

callback-widget.lisp (file)

Method: append-item (THIS <radio-field>) (ITEM string)

Source

callback-widget.lisp (file)

Method: append-item (THIS <select-field>) (ITEM <option-field>)

Source

callback-widget.lisp (file)

Method: append-item (THIS <dirty-widget-holder>) (ITEM <widget>)

Source

widget.lisp (file)

Method: append-item (THIS <widget-holder>) (ITEM <widget>)

Source

widget.lisp (file)

Method: append-item THIS ITEM

Generic Function: base-path OBJECT

Generic Function: (setf base-path) NEW-VALUE OBJECT

Package

caveman2-widgets.navigation

Methods

Method: base-path (<NAVIGATION-WIDGET> <navigation-widget>)

Method: (setf base-path) NEW-VALUE (<NAVIGATION-WIDGET> <navigation-widget>)

Determines the path for this navigation. It does not need an initial or trailing forward slash.

Source

navigation.lisp (file)

Generic Function: body OBJECT

Generic Function: (setf body) NEW-VALUE OBJECT

Package

caveman2-widgets.document

Methods

Method: body (<HTML-DOCUMENT-WIDGET> <html-document-widget>)

automatically generated reader method

Source

document.lisp (file)

Method: (setf body) NEW-VALUE (<HTML-DOCUMENT-WIDGET> <html-document-widget>)

automatically generated writer method

Source

document.lisp (file)

Generic Function: bottom OBJECT

Generic Function: (setf bottom) NEW-VALUE OBJECT

Package

caveman2-widgets.document

Methods

Method: bottom (<HTML-DOCUMENT-WIDGET> <html-document-widget>)

automatically generated reader method

Source

document.lisp (file)

Method: (setf bottom) NEW-VALUE (<HTML-DOCUMENT-WIDGET> <html-document-widget>)

automatically generated writer method

Source

document.lisp (file)

Generic Function: callback OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: callback (<CALLBACK-WIDGET> <callback-widget>)

Source

callback-widget.lisp (file)

Generic Function: charset OBJECT

Generic Function: (setf charset) NEW-VALUE OBJECT

Package

caveman2-widgets.document

Methods

Method: charset (<HEADER-WIDGET> <header-widget>)

automatically generated reader method

Source

document.lisp (file)

Method: (setf charset) NEW-VALUE (<HEADER-WIDGET> <header-widget>)

automatically generated writer method

Source

document.lisp (file)

Generic Function: check-function OBJECT

Generic Function: (setf check-function) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: check-function (<FORM-FIELD> <form-field>)

Method: (setf check-function) NEW-VALUE (<FORM-FIELD> <form-field>)

Checks the user input for flaws. Takes one
argument - the string passed by the user. Should return non-nil if everything is correct.

Source

callback-widget.lisp (file)

Generic Function: checked-option OBJECT

Generic Function: (setf checked-option) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: checked-option (<RADIO-FIELD> <radio-field>)

Method: (setf checked-option) NEW-VALUE (<RADIO-FIELD> <radio-field>)

The option which is checked. Must be a number. Start with 0.

Source

callback-widget.lisp (file)

Generic Function: classes OBJECT

Generic Function: (setf classes) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: classes (<CALLBACK-WIDGET> <callback-widget>)

automatically generated reader method

Source

callback-widget.lisp (file)

Method: (setf classes) NEW-VALUE (<CALLBACK-WIDGET> <callback-widget>)

automatically generated writer method

Source

callback-widget.lisp (file)

Generic Function: column-descriptions OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: column-descriptions (<TABLE-WIDGET> <table-widget>)

This is a list of cons which where the cons is one column. The first value of the cons is the keyword to display. The second value of the cons is the table header for that column. For the header (second value) you can use HTML code!

Example:
(list (list :firstcolumn "First column"))

Source

default-widgets.lisp (file)

Generic Function: composite OBJECT

Generic Function: (setf composite) NEW-VALUE OBJECT

Package

caveman2-widgets.navigation

Methods

Method: composite (<NAVIGATION-WIDGET> <navigation-widget>)

automatically generated reader method

Source

navigation.lisp (file)

Method: (setf composite) NEW-VALUE (<NAVIGATION-WIDGET> <navigation-widget>)

automatically generated writer method

Source

navigation.lisp (file)

Generic Function: crossorigin OBJECT

Generic Function: (setf crossorigin) NEW-VALUE OBJECT

Package

caveman2-widgets.document

Methods

Method: crossorigin (<FILE> <file>)

automatically generated reader method

Source

document.lisp (file)

Method: (setf crossorigin) NEW-VALUE (<FILE> <file>)

automatically generated writer method

Source

document.lisp (file)

Generic Function: current-page OBJECT

Package

caveman2-widgets.navigation

Writer

(setf current-page) (generic function)

Methods

Method: current-page (<NAVIGATION-WIDGET> <navigation-widget>)

The name for the current page to display.

Source

navigation.lisp (file)

Generic Function: (setf current-page) VALUE THIS

Package

caveman2-widgets.navigation

Source

navigation.lisp (file)

Reader

current-page (generic function)

Methods

Method: (setf current-page) VALUE (THIS <navigation-widget>)

@param value Must be an uri path string

Generic Function: delete-item THIS ITEM

Package

caveman2-widgets.util

Source

util.lisp (file)

Methods

Method: delete-item (THIS <dirty-widget-holder>) (ITEM <widget>)

Source

widget.lisp (file)

Method: delete-item (THIS <widget-holder>) (ITEM <widget>)

Source

widget.lisp (file)

Method: delete-item THIS ITEM

Generic Function: east OBJECT

Generic Function: (setf east) NEW-VALUE OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: east (<BORDER-WIDGET> <border-widget>)

automatically generated reader method

Source

default-widgets.lisp (file)

Method: (setf east) NEW-VALUE (<BORDER-WIDGET> <border-widget>)

automatically generated writer method

Source

default-widgets.lisp (file)

Generic Function: error-happened OBJECT

Generic Function: (setf error-happened) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: error-happened (<FORM-FIELD> <form-field>)

Method: (setf error-happened) NEW-VALUE (<FORM-FIELD> <form-field>)

A highly frequented slot. Non-nil indicates that an error occurred.

Source

callback-widget.lisp (file)

Generic Function: error-message OBJECT

Generic Function: (setf error-message) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: error-message (<FORM-FIELD> <form-field>)

Method: (setf error-message) NEW-VALUE (<FORM-FIELD> <form-field>)

The error message that will be displayed if
ERROR-HAPPENED is non-nil. The error message will be translated before rendered.

Source

callback-widget.lisp (file)

Generic Function: find-item THIS TO-FIND

Package

caveman2-widgets.util

Source

util.lisp (file)

Methods

Method: find-item (THIS <navigation-widget>) (ITEM string)

@param item The URI path as string.

Source

navigation.lisp (file)

Method: find-item (THIS <widget-holder>) (TO-FIND string)

Source

widget.lisp (file)

Method: find-item THIS ITEM

Generic Function: fn OBJECT

Generic Function: (setf fn) NEW-VALUE OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: fn (<FUNCTION-WIDGET> <function-widget>)

automatically generated reader method

Source

default-widgets.lisp (file)

Method: (setf fn) NEW-VALUE (<FUNCTION-WIDGET> <function-widget>)

automatically generated writer method

Source

default-widgets.lisp (file)

Generic Function: get-as-list THIS

This generic method should return the entire object
as cons-list. If you want to hide certain slots, just keep them out of the list!

Package

caveman2-widgets.default-widgets

Source

default-widgets.lisp (file)

Methods

Method: get-as-list (THIS <table-item>)

Generic Function: header OBJECT

Generic Function: (setf header) NEW-VALUE OBJECT

Package

caveman2-widgets.document

Methods

Method: header (<HTML-DOCUMENT-WIDGET> <html-document-widget>)

automatically generated reader method

Source

document.lisp (file)

Method: (setf header) NEW-VALUE (<HTML-DOCUMENT-WIDGET> <html-document-widget>)

automatically generated writer method

Source

document.lisp (file)

Generic Function: http-method OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: http-method (<CALLBACK-WIDGET> <callback-widget>)

This slot should be one of the HTTP methods as keyword (e.g. :post or :get

Source

callback-widget.lisp (file)

Generic Function: icon-path OBJECT

Generic Function: (setf icon-path) NEW-VALUE OBJECT

Package

caveman2-widgets.document

Methods

Method: icon-path (<HEADER-WIDGET> <header-widget>)

Method: (setf icon-path) NEW-VALUE (<HEADER-WIDGET> <header-widget>)

The path to a specific image to use as icon for page.

Source

document.lisp (file)

Generic Function: id OBJECT

Package

caveman2-widgets.widget

Methods

Method: id (<WIDGET> <widget>)

automatically generated reader method

Source

widget.lisp (file)

Generic Function: input-fields OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: input-fields (<FORM-WIDGET> <form-widget>)

A list of <FORM-FIELD> objects.

Source

callback-widget.lisp (file)

Generic Function: input-type OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: input-type (<INPUT-FIELD> <input-field>)

automatically generated reader method

Source

callback-widget.lisp (file)

Generic Function: javascript-available SESSION

Generic Function: (setf javascript-available) VALUE SESSION

Package

caveman2-widgets.util

Source

util.lisp (file)

Methods

Method: javascript-available (SESSION hash-table)

Method: (setf javascript-available) VALUE (SESSION hash-table)

Generic Function: label OBJECT

Generic Function: (setf label) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: label (<FORM-FIELD> <form-field>)

Method: (setf label) NEW-VALUE (<FORM-FIELD> <form-field>)

The label which will be placed before the <input> tag.

Source

callback-widget.lisp (file)

Method: label (<CALLBACK-WIDGET> <callback-widget>)

automatically generated reader method

Source

callback-widget.lisp (file)

Generic Function: logged-in SESSION

Generic Function: (setf logged-in) VALUE SESSION

Package

caveman2-widgets.login

Source

login.lisp (file)

Methods

Method: logged-in (SESSION hash-table)

Method: (setf logged-in) VALUE (SESSION hash-table)

Generic Function: login-authenticator OBJECT

Package

caveman2-widgets.login

Methods

Method: login-authenticator (<LOGIN-WIDGET> <login-widget>)

Must be a function that takes two parameters. The first is the username and the second is the password.

Source

login.lisp (file)

Generic Function: login-form OBJECT

Package

caveman2-widgets.login

Methods

Method: login-form (<LOGIN-WIDGET> <login-widget>)

automatically generated reader method

Source

login.lisp (file)

Generic Function: logout-button OBJECT

Package

caveman2-widgets.login

Methods

Method: logout-button (<LOGIN-WIDGET> <login-widget>)

automatically generated reader method

Source

login.lisp (file)

Generic Function: max-items-to-display OBJECT

Generic Function: (setf max-items-to-display) NEW-VALUE OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: max-items-to-display (<VIEWGRID-WIDGET> <viewgrid-widget>)

Method: (setf max-items-to-display) NEW-VALUE (<VIEWGRID-WIDGET> <viewgrid-widget>)

Non-nil value must be a number which describes how many items will be displayed on each viewgrid page.

Source

default-widgets.lisp (file)

Generic Function: multiple OBJECT

Generic Function: (setf multiple) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: multiple (<SELECT-FIELD> <select-field>)

Method: (setf multiple) NEW-VALUE (<SELECT-FIELD> <select-field>)

Non-nil allows multiple choices.

Source

callback-widget.lisp (file)

Generic Function: name OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: name (<FORM-FIELD> <form-field>)

automatically generated reader method

Source

callback-widget.lisp (file)

Generic Function: north OBJECT

Generic Function: (setf north) NEW-VALUE OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: north (<BORDER-WIDGET> <border-widget>)

automatically generated reader method

Source

default-widgets.lisp (file)

Method: (setf north) NEW-VALUE (<BORDER-WIDGET> <border-widget>)

automatically generated writer method

Source

default-widgets.lisp (file)

Generic Function: on-view OBJECT

Generic Function: (setf on-view) NEW-VALUE OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: on-view (<VIEWGRID-WIDGET> <viewgrid-widget>)

Method: (setf on-view) NEW-VALUE (<VIEWGRID-WIDGET> <viewgrid-widget>)

Must either be NIL or a function which takes one
argument. The passed argument is the item in the viewgrid which is viewed. If the value is NIL the client can’t view a specific item.

Source

default-widgets.lisp (file)

Generic Function: on-view-label OBJECT

Generic Function: (setf on-view-label) NEW-VALUE OBJECT

Package

caveman2-widgets.default-widgets

Methods

Method: on-view-label (<VIEWGRID-WIDGET> <viewgrid-widget>)

Method: (setf on-view-label) NEW-VALUE (<VIEWGRID-WIDGET> <viewgrid-widget>)

The text which should be displayed on the button for the ON-VIEW callback.

Source

default-widgets.lisp (file)

Generic Function: options OBJECT

Generic Function: (setf options) NEW-VALUE OBJECT

Package

caveman2-widgets.callback-widget

Methods

Method: options (<RADIO-FIELD> <radio-field>)

automatically generated reader method

Source

callback-widget.lisp (file)

Method: (setf options) NEW-VALUE (<RADIO-FIELD> <radio-field>)

automatically generated writer method

Source

callback-widget.lisp (file)

Method: options (<SELECT-FIELD> <select-field>)

automatically generated reader method

Source

callback-widget.lisp (file)

Method: (setf options) NEW-VALUE (<SELECT-FIELD> <select-field>)

automatically generated writer method

Source

callback-widget.lisp (file)

Generic Function: other-header-content OBJECT

Package

caveman2-widgets.document

Methods

Method: other-header-content (<HEADER-WIDGET> <header-widget>)

A list of strings that will be directly put in the header tag.

Source

document.lisp (file)

Generic Function: pages OBJECT

Package

caveman2-widgets.navigation

Methods

Method: pages (<NAVIGATION-WIDGET> <navigation-widget>)

A list of cons. This slot holds all possible pages
and it should look like: (list (list "pagetitle" "uri-path" <widget>))

Source

navigation.lisp (file)

Generic Function: path OBJECT

Package

caveman2-widgets.document

Methods

Method: path (<FILE> <file>)

automatically generated reader method

Source

document.lisp (file)

Generic Function: protect-widget WIDGET FOR

@return The WIDGET object.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Methods

Method: protect-widget (WIDGET <widget>) (FOR symbol)

@param for A keyword

Method: protect-widget (WIDGET <widget>) (FOR list)

@param for A list of keywords

Generic Function: protected OBJECT

Package

caveman2-widgets.widget

Methods

Method: protected (<WIDGET> <widget>)

This is a list of protection circles. If NIL (or
an empty list) the widget is not procted. If non-nil it should be a list of keywords. That list indicates which keywords (or authorized circles) the requester has in his session. Use PROTECT-WIDGET to use this slot.

Source

widget.lisp (file)

Generic Function: render-as THIS VIEW

Package

caveman2-widgets.default-widgets

Source

default-widgets.lisp (file)

Methods

Method: render-as (THIS <viewgrid-item>) (VIEW (eql oneline))

Method: render-as (THIS <viewgrid-item>) (VIEW (eql short))

Method: render-as (THIS <viewgrid-item>) (VIEW (eql full))

Generic Function: render-widget THIS

@return Returns the HTML representation of the
widget as string. It is intended to use this within a simple HTML transfer or embedded in another page.

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Methods

Method: render-widget (THIS <blank-navigation-widget>)

Source

navigation.lisp (file)

Method: render-widget (THIS <menu-navigation-widget>)

Source

navigation.lisp (file)

Method: render-widget (THIS <html-document-widget>)

Source

document.lisp (file)

Method: render-widget (THIS <header-widget>)

Source

document.lisp (file)

Method: render-widget (THIS <css-file>)

Source

document.lisp (file)

Method: render-widget (THIS <js-file>)

Source

document.lisp (file)

Method: render-widget (THIS <login-widget>)

Source

login.lisp (file)

Method: render-widget (THIS <border-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <viewgrid-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <table-widget>) around

Source

default-widgets.lisp (file)

Method: render-widget (THIS <table-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <function-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <hcomposite-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <composite-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <string-widget>)

Source

default-widgets.lisp (file)

Method: render-widget (THIS <form-widget>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <radio-field>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <select-field>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <option-field>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <input-field>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <form-field>) around

Source

callback-widget.lisp (file)

Method: render-widget (THIS <form-field>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <link-widget>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <button-widget>)

Source

callback-widget.lisp (file)

Method: render-widget (THIS <widget>) around

Generic Function: render-widget-body THIS

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Methods

Method: render-widget-body (THIS <table-widget>)

Source

default-widgets.lisp (file)

Generic Function: render-widget-header THIS

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Methods

Method: render-widget-header (THIS <table-widget>)

Source

default-widgets.lisp (file)

Generic Function: render-widget-rest THIS METHOD ARGS

@return Returns the HTML representation of the
widget as string. To generate a method for a specific HTTP method you can do the following:

(defmethod render-widget-rest ((this <widget>) (method (eql :get)) (args t)) "HTML output for the REST when GET.")

Package

caveman2-widgets.widget

Source

widget.lisp (file)

Methods

Method: render-widget-rest (THIS <widget>) METHOD ARGS around

Method: render-widget-rest (THIS <widget>) METHOD ARGS