;;; Code:
(eval-when-compile (require 'cl))
+(require 'format-spec)
(require 'shr)
(require 'url)
+(require 'mm-url)
+
+(defgroup eww nil
+ "Emacs Web Wowser"
+ :version "24.4"
+ :group 'hypermedia
+ :prefix "eww-")
+
+(defcustom eww-header-line-format "%t: %u"
+ "Header line format.
+- %t is replaced by the title.
+- %u is replaced by the URL."
+ :group 'eww
+ :type 'string)
+
+(defface eww-button
+ '((((type x w32 ns) (class color)) ; Like default mode line
+ :box (:line-width 2 :style released-button)
+ :background "lightgrey" :foreground "black"))
+ "Face for eww buffer buttons."
+ :version "24.4"
+ :group 'eww)
(defvar eww-current-url nil)
+(defvar eww-current-title ""
+ "Title of current page.")
(defvar eww-history nil)
+;;;###autoload
(defun eww (url)
"Fetch URL and render the page."
(interactive "sUrl: ")
+ (unless (string-match-p "\\`[a-zA-Z][-a-zA-Z0-9+.]*://" url)
+ (setq url (concat "http://" url)))
(url-retrieve url 'eww-render (list url)))
+(defun eww-detect-charset (html-p)
+ (let ((case-fold-search t)
+ (pt (point)))
+ (or (and html-p
+ (re-search-forward
+ "<meta[\t\n\r ]+[^>]*charset=\\([^\t\n\r \"/>]+\\)" nil t)
+ (goto-char pt)
+ (match-string 1))
+ (and (looking-at
+ "[\t\n\r ]*<\\?xml[\t\n\r ]+[^>]*encoding=\"\\([^\"]+\\)")
+ (match-string 1)))))
+
(defun eww-render (status url &optional point)
+ (let ((redirect (plist-get status :redirect)))
+ (when redirect
+ (setq url redirect)))
(let* ((headers (eww-parse-headers))
+ (shr-target-id
+ (and (string-match "#\\(.*\\)" url)
+ (match-string 1 url)))
(content-type
(mail-header-parse-content-type
(or (cdr (assoc "content-type" headers))
(charset (intern
(downcase
(or (cdr (assq 'charset (cdr content-type)))
+ (eww-detect-charset (equal (car content-type)
+ "text/html"))
"utf8"))))
(data-buffer (current-buffer)))
(unwind-protect
(eww-display-image))
(t
(eww-display-raw charset)))
- (when point
- (goto-char point)))
+ (cond
+ (point
+ (goto-char point))
+ (shr-target-id
+ (let ((point (next-single-property-change
+ (point-min) 'shr-target-id)))
+ (when point
+ (goto-char (1+ point)))))))
(kill-buffer data-buffer))))
(defun eww-parse-headers ()
(let ((headers nil))
+ (goto-char (point-min))
(while (and (not (eobp))
(not (eolp)))
(when (looking-at "\\([^:]+\\): *\\(.*\\)")
(libxml-parse-html-region (point) (point-max)))))
(eww-setup-buffer)
(setq eww-current-url url)
- (let ((inhibit-read-only t))
- (shr-insert-document document))
+ (eww-update-header-line-format)
+ (let ((inhibit-read-only t)
+ (shr-width nil)
+ (shr-external-rendering-functions
+ '((title . eww-tag-title)
+ (form . eww-tag-form)
+ (input . eww-tag-input)
+ (textarea . eww-tag-textarea)
+ (body . eww-tag-body)
+ (select . eww-tag-select))))
+ (shr-insert-document document)
+ (eww-convert-widgets))
(goto-char (point-min))))
+(defun eww-update-header-line-format ()
+ (if eww-header-line-format
+ (setq header-line-format (format-spec eww-header-line-format
+ `((?u . ,eww-current-url)
+ (?t . ,eww-current-title))))
+ (setq header-line-format nil)))
+
+(defun eww-tag-title (cont)
+ (setq eww-current-title "")
+ (dolist (sub cont)
+ (when (eq (car sub) 'text)
+ (setq eww-current-title (concat eww-current-title (cdr sub)))))
+ (eww-update-header-line-format))
+
+(defun eww-tag-body (cont)
+ (let* ((start (point))
+ (fgcolor (cdr (or (assq :fgcolor cont)
+ (assq :text cont))))
+ (bgcolor (cdr (assq :bgcolor cont)))
+ (shr-stylesheet (list (cons 'color fgcolor)
+ (cons 'background-color bgcolor))))
+ (shr-generic cont)
+ (eww-colorize-region start (point) fgcolor bgcolor)))
+
+(defun eww-colorize-region (start end fg &optional bg)
+ (when (or fg bg)
+ (let ((new-colors (shr-color-check fg bg)))
+ (when new-colors
+ (when fg
+ (add-face-text-property start end
+ (list :foreground (cadr new-colors))))
+ (when bg
+ (add-face-text-property start end
+ (list :background (car new-colors))))))))
+
(defun eww-display-raw (charset)
(let ((data (buffer-substring (point) (point-max))))
(eww-setup-buffer)
(defun eww-setup-buffer ()
(pop-to-buffer (get-buffer-create "*eww*"))
+ (remove-overlays)
+ (setq widget-field-list nil)
(let ((inhibit-read-only t))
(erase-buffer))
(eww-mode))
(let ((map (make-sparse-keymap)))
(suppress-keymap map)
(define-key map "q" 'eww-quit)
- (define-key map [tab] 'widget-forward)
- (define-key map [backtab] 'widget-backward)
+ (define-key map "g" 'eww-reload)
+ (define-key map [tab] 'shr-next-link)
+ (define-key map [backtab] 'shr-previous-link)
(define-key map [delete] 'scroll-down-command)
(define-key map "\177" 'scroll-down-command)
(define-key map " " 'scroll-up-command)
;;(define-key map "n" 'eww-next-url)
map))
-(defun eww-mode ()
+(define-derived-mode eww-mode nil "eww"
"Mode for browsing the web.
\\{eww-mode-map}"
- (interactive)
- (setq major-mode 'eww-mode
- mode-name "eww")
(set (make-local-variable 'eww-current-url) 'author)
- (set (make-local-variable 'browse-url-browser-function) 'eww-browse-url)
- (setq buffer-read-only t)
- (use-local-map eww-mode-map))
+ (set (make-local-variable 'browse-url-browser-function) 'eww-browse-url))
(defun eww-browse-url (url &optional new-window)
(push (list eww-current-url (point))
(let ((prev (pop eww-history)))
(url-retrieve (car prev) 'eww-render (list (car prev) (cadr prev)))))
+(defun eww-reload ()
+ "Reload the current page."
+ (interactive)
+ (url-retrieve eww-current-url 'eww-render
+ (list eww-current-url (point))))
+
+;; Form support.
+
+(defvar eww-form nil)
+
+(defun eww-tag-form (cont)
+ (let ((eww-form
+ (list (assq :method cont)
+ (assq :action cont)))
+ (start (point)))
+ (shr-ensure-paragraph)
+ (shr-generic cont)
+ (unless (bolp)
+ (insert "\n"))
+ (insert "\n")
+ (when (> (point) start)
+ (put-text-property start (1+ start)
+ 'eww-form eww-form))))
+
+(defun eww-tag-input (cont)
+ (let* ((start (point))
+ (type (downcase (or (cdr (assq :type cont))
+ "text")))
+ (value (cdr (assq :value cont)))
+ (widget
+ (cond
+ ((equal type "submit")
+ (list 'push-button
+ :notify 'eww-submit
+ :name (cdr (assq :name cont))
+ :value (if (zerop (length value))
+ "Submit"
+ value)
+ :eww-form eww-form
+ (or (if (zerop (length value))
+ "Submit"
+ value))))
+ ((or (equal type "radio")
+ (equal type "checkbox"))
+ (list 'checkbox
+ :notify 'eww-click-radio
+ :name (cdr (assq :name cont))
+ :checkbox-value value
+ :checkbox-type type
+ :eww-form eww-form
+ (cdr (assq :checked cont))))
+ ((equal type "hidden")
+ (list 'hidden
+ :name (cdr (assq :name cont))
+ :value value))
+ (t
+ (list 'editable-field
+ :size (string-to-number
+ (or (cdr (assq :size cont))
+ "40"))
+ :value value
+ :secret (and (equal type "password") ?*)
+ :action 'eww-submit
+ :name (cdr (assq :name cont))
+ :eww-form eww-form)))))
+ (nconc eww-form (list widget))
+ (unless (eq (car widget) 'hidden)
+ (apply 'widget-create widget)
+ (put-text-property start (point) 'eww-widget widget)
+ (insert " "))))
+
+(defun eww-tag-textarea (cont)
+ (let* ((start (point))
+ (widget
+ (list 'text
+ :size (string-to-number
+ (or (cdr (assq :cols cont))
+ "40"))
+ :value (or (cdr (assq 'text cont)) "")
+ :action 'eww-submit
+ :name (cdr (assq :name cont))
+ :eww-form eww-form)))
+ (nconc eww-form (list widget))
+ (apply 'widget-create widget)
+ (put-text-property start (point) 'eww-widget widget)))
+
+(defun eww-tag-select (cont)
+ (shr-ensure-paragraph)
+ (let ((menu (list 'menu-choice
+ :name (cdr (assq :name cont))
+ :eww-form eww-form))
+ (options nil)
+ (start (point)))
+ (dolist (elem cont)
+ (when (eq (car elem) 'option)
+ (when (cdr (assq :selected (cdr elem)))
+ (nconc menu (list :value
+ (cdr (assq :value (cdr elem))))))
+ (push (list 'item
+ :value (cdr (assq :value (cdr elem)))
+ :tag (cdr (assq 'text (cdr elem))))
+ options)))
+ (when options
+ ;; If we have no selected values, default to the first value.
+ (unless (plist-get (cdr menu) :value)
+ (nconc menu (list :value (nth 2 (car options)))))
+ (nconc menu options)
+ (apply 'widget-create menu)
+ (put-text-property start (point) 'eww-widget menu)
+ (shr-ensure-paragraph))))
+
+(defun eww-click-radio (widget &rest ignore)
+ (let ((form (plist-get (cdr widget) :eww-form))
+ (name (plist-get (cdr widget) :name)))
+ (when (equal (plist-get (cdr widget) :type) "radio")
+ (if (widget-value widget)
+ ;; Switch all the other radio buttons off.
+ (dolist (overlay (overlays-in (point-min) (point-max)))
+ (let ((field (plist-get (overlay-properties overlay) 'button)))
+ (when (and (eq (plist-get (cdr field) :eww-form) form)
+ (equal name (plist-get (cdr field) :name)))
+ (unless (eq field widget)
+ (widget-value-set field nil)))))
+ (widget-value-set widget t)))
+ (eww-fix-widget-keymap)))
+
+(defun eww-submit (widget &rest ignore)
+ (let ((form (plist-get (cdr widget) :eww-form))
+ values)
+ (dolist (overlay (sort (overlays-in (point-min) (point-max))
+ (lambda (o1 o2)
+ (< (overlay-start o1) (overlay-start o2)))))
+ (let ((field (or (plist-get (overlay-properties overlay) 'field)
+ (plist-get (overlay-properties overlay) 'button))))
+ (when (eq (plist-get (cdr field) :eww-form) form)
+ (let ((name (plist-get (cdr field) :name)))
+ (when name
+ (cond
+ ((eq (car field) 'checkbox)
+ (when (widget-value field)
+ (push (cons name (plist-get (cdr field) :checkbox-value))
+ values)))
+ ((eq (car field) 'push-button)
+ ;; We want the values from buttons if we hit a button,
+ ;; if it's the first button in the DOM after the field
+ ;; hit ENTER on.
+ (when (and (eq (car widget) 'push-button)
+ (eq widget field))
+ (push (cons name (widget-value field))
+ values)))
+ (t
+ (push (cons name (widget-value field))
+ values))))))))
+ (dolist (elem form)
+ (when (and (consp elem)
+ (eq (car elem) 'hidden))
+ (push (cons (plist-get (cdr elem) :name)
+ (plist-get (cdr elem) :value))
+ values)))
+ ;; If we hit ENTER in a non-button field, include the value of the
+ ;; first submit button after it.
+ (unless (eq (car widget) 'push-button)
+ (let ((rest form)
+ (name (plist-get (cdr widget) :name)))
+ (when rest
+ (while (and rest
+ (or (not (consp (car rest)))
+ (not (equal name (plist-get (cdar rest) :name)))))
+ (pop rest)))
+ (while rest
+ (let ((elem (pop rest)))
+ (when (and (consp (car rest))
+ (eq (car elem) 'push-button))
+ (push (cons (plist-get (cdr elem) :name)
+ (plist-get (cdr elem) :value))
+ values)
+ (setq rest nil))))))
+ (if (and (stringp (cdr (assq :method form)))
+ (equal (downcase (cdr (assq :method form))) "post"))
+ (let ((url-request-method "POST")
+ (url-request-extra-headers
+ '(("Content-Type" . "application/x-www-form-urlencoded")))
+ (url-request-data (mm-url-encode-www-form-urlencoded values)))
+ (eww-browse-url (shr-expand-url (cdr (assq :action form))
+ eww-current-url)))
+ (eww-browse-url
+ (concat
+ (if (cdr (assq :action form))
+ (shr-expand-url (cdr (assq :action form))
+ eww-current-url)
+ eww-current-url)
+ "?"
+ (mm-url-encode-www-form-urlencoded values))))))
+
+(defun eww-convert-widgets ()
+ (let ((start (point-min))
+ widget)
+ ;; Some widgets come from different buffers (rendered for tables),
+ ;; so we need to nix out the list of widgets and recreate them.
+ (setq widget-field-list nil
+ widget-field-new nil)
+ (while (setq start (next-single-property-change start 'eww-widget))
+ (setq widget (get-text-property start 'eww-widget))
+ (goto-char start)
+ (let ((end (next-single-property-change start 'eww-widget)))
+ (dolist (overlay (overlays-in start end))
+ (when (or (plist-get (overlay-properties overlay) 'button)
+ (plist-get (overlay-properties overlay) 'field))
+ (delete-overlay overlay)))
+ (delete-region start end))
+ (when (and widget
+ (not (eq (car widget) 'hidden)))
+ (apply 'widget-create widget)
+ (put-text-property start (point) 'help-echo
+ (if (memq (car widget) '(text editable-field))
+ "Input field"
+ "Button"))
+ (when (eq (car widget) 'push-button)
+ (add-face-text-property start (point) 'eww-button t))))
+ (widget-setup)
+ (eww-fix-widget-keymap)))
+
+(defun eww-fix-widget-keymap ()
+ (dolist (overlay (overlays-in (point-min) (point-max)))
+ (when (plist-get (overlay-properties overlay) 'button)
+ (overlay-put overlay 'local-map widget-keymap))))
+
(provide 'eww)
;;; eww.el ends here
projects / gnus / blobdiff