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69 lines
3.2 KiB
Common Lisp
69 lines
3.2 KiB
Common Lisp
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;; CLOG - The Common Lisp Omnificent GUI ;;;;
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;;;; (c) 2020-2022 David Botton ;;;;
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;;;; License BSD 3 Clause ;;;;
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;;;; ;;;;
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;;;; clog-style.lisp ;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(cl:in-package :clog)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Implementation - clog-style-block
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defclass clog-style-block (clog-element)()
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(:documentation "CLOG style-blocks for applying css styles."))
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;;;;;;;;;;;;;;;;;;;;;;;;
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;; create-style-block ;;
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;;;;;;;;;;;;;;;;;;;;;;;;
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(defgeneric create-style-block (clog-obj
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&key content media html-id auto-place)
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(:documentation "Ideally style blocks should be created in the (head body)
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clog-element but can be placed anywhere on a document and are applied as found
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in the document. Although they are not 'scoped'. Media is a css media query
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defaulting to all. To load CSS style sheets from files see LOAD-CSS in
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clog-document. The add-style method can be used or can directly use the
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TEXT method to access blocks content."))
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(defmethod create-style-block ((obj clog-obj)
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&key
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(content "")
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(media "all")
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(html-id nil) (auto-place t))
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(create-child obj (format nil "<style media='~A'>~A</style>"
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(escape-string media :html t)
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(escape-string content :html t))
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:clog-type 'clog-style-block
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:html-id html-id
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:auto-place auto-place))
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;;;;;;;;;;;;;;;
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;; add-style ;;
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;;;;;;;;;;;;;;;
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(deftype selector-type () '(member :element :id :class))
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(defgeneric add-style (clog-style-block selector-type selector style-alist)
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(:documentation "Add to style-block an alist of css styles to affect
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selector. For example:
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(add-style :element \"a\" '((\"text-decoration\" :none)))"))
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(defmethod add-style ((obj clog-style-block) selector-type selector style-alist)
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(let ((old-text (text obj)))
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(setf (text obj) (format nil "~A ~A~A\{~{~A~}\}"
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(if old-text
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old-text
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"")
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(cond ((eq selector-type :id) "#")
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((eq selector-type :element) "")
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((eq selector-type :class) ".")
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(t ""))
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selector
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(mapcar (lambda (s)
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(format nil "~A:~A;"
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(car s)
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(cadr s)))
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style-alist)))))
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