bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
597 lines
22 KiB
EmacsLisp
597 lines
22 KiB
EmacsLisp
;;; xwidget.el --- api functions for xwidgets -*- lexical-binding: t -*-
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;;
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;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
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;;
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;; Author: Joakim Verona (joakim@verona.se)
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;;
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;
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;; --------------------------------------------------------------------
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;;; Commentary:
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;;
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;; See xwidget.c for more api functions.
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;; This breaks compilation when we don't have xwidgets.
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;; And is pointless when we do, since it's in C and so preloaded.
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;;(require 'xwidget-internal)
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;;; Code:
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(require 'cl-lib)
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(require 'bookmark)
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(declare-function make-xwidget "xwidget.c"
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(type title width height arguments &optional buffer))
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(declare-function xwidget-buffer "xwidget.c" (xwidget))
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(declare-function xwidget-size-request "xwidget.c" (xwidget))
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(declare-function xwidget-resize "xwidget.c" (xwidget new-width new-height))
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(declare-function xwidget-webkit-execute-script "xwidget.c"
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(xwidget script &optional callback))
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(declare-function xwidget-webkit-goto-uri "xwidget.c" (xwidget uri))
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(declare-function xwidget-webkit-zoom "xwidget.c" (xwidget factor))
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(declare-function xwidget-plist "xwidget.c" (xwidget))
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(declare-function set-xwidget-plist "xwidget.c" (xwidget plist))
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(declare-function xwidget-view-window "xwidget.c" (xwidget-view))
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(declare-function xwidget-view-model "xwidget.c" (xwidget-view))
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(declare-function delete-xwidget-view "xwidget.c" (xwidget-view))
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(declare-function get-buffer-xwidgets "xwidget.c" (buffer))
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(declare-function xwidget-query-on-exit-flag "xwidget.c" (xwidget))
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(defun xwidget-insert (pos type title width height &optional args)
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"Insert an xwidget at position POS.
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Supply the xwidget's TYPE, TITLE, WIDTH, and HEIGHT.
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See `make-xwidget' for the possible TYPE values.
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The usage of optional argument ARGS depends on the xwidget.
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This returns the result of `make-xwidget'."
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(goto-char pos)
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(let ((id (make-xwidget type title width height args)))
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(put-text-property (point) (+ 1 (point))
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'display (list 'xwidget ':xwidget id))
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id))
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(defun xwidget-at (pos)
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"Return xwidget at POS."
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;; TODO this function is a bit tedious because the C layer isn't well
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;; protected yet and xwidgetp apparently doesn't work yet.
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(let* ((disp (get-text-property pos 'display))
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(xw (car (cdr (cdr disp)))))
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;;(if (xwidgetp xw) xw nil)
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(if (equal 'xwidget (car disp)) xw)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; webkit support
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(require 'browse-url)
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(require 'image-mode);;for some image-mode alike functionality
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;;;###autoload
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(defun xwidget-webkit-browse-url (url &optional new-session)
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"Ask xwidget-webkit to browse URL.
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NEW-SESSION specifies whether to create a new xwidget-webkit session.
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Interactively, URL defaults to the string looking like a url around point."
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(interactive (progn
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(require 'browse-url)
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(browse-url-interactive-arg "xwidget-webkit URL: "
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;;(xwidget-webkit-current-url)
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)))
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(or (featurep 'xwidget-internal)
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(user-error "Your Emacs was not compiled with xwidgets support"))
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(when (stringp url)
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(if new-session
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(xwidget-webkit-new-session url)
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(xwidget-webkit-goto-url url))))
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;;todo.
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;; - check that the webkit support is compiled in
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(defvar xwidget-webkit-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map "g" 'xwidget-webkit-browse-url)
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(define-key map "a" 'xwidget-webkit-adjust-size-dispatch)
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(define-key map "b" 'xwidget-webkit-back)
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(define-key map "r" 'xwidget-webkit-reload)
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(define-key map "t" (lambda () (interactive) (message "o"))) ;FIXME: ?!?
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(define-key map "\C-m" 'xwidget-webkit-insert-string)
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(define-key map "w" 'xwidget-webkit-current-url)
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(define-key map "+" 'xwidget-webkit-zoom-in)
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(define-key map "-" 'xwidget-webkit-zoom-out)
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;;similar to image mode bindings
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(define-key map (kbd "SPC") 'xwidget-webkit-scroll-up)
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(define-key map (kbd "DEL") 'xwidget-webkit-scroll-down)
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(define-key map [remap scroll-up] 'xwidget-webkit-scroll-up)
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(define-key map [remap scroll-up-command] 'xwidget-webkit-scroll-up)
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(define-key map [remap scroll-down] 'xwidget-webkit-scroll-down)
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(define-key map [remap scroll-down-command] 'xwidget-webkit-scroll-down)
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(define-key map [remap forward-char] 'xwidget-webkit-scroll-forward)
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(define-key map [remap backward-char] 'xwidget-webkit-scroll-backward)
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(define-key map [remap right-char] 'xwidget-webkit-scroll-forward)
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(define-key map [remap left-char] 'xwidget-webkit-scroll-backward)
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(define-key map [remap previous-line] 'xwidget-webkit-scroll-down)
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(define-key map [remap next-line] 'xwidget-webkit-scroll-up)
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;; (define-key map [remap move-beginning-of-line] 'image-bol)
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;; (define-key map [remap move-end-of-line] 'image-eol)
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(define-key map [remap beginning-of-buffer] 'xwidget-webkit-scroll-top)
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(define-key map [remap end-of-buffer] 'xwidget-webkit-scroll-bottom)
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map)
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"Keymap for `xwidget-webkit-mode'.")
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(defun xwidget-webkit-zoom-in ()
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"Increase webkit view zoom factor."
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(interactive)
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(xwidget-webkit-zoom (xwidget-webkit-current-session) 0.1))
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(defun xwidget-webkit-zoom-out ()
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"Decrease webkit view zoom factor."
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(interactive)
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(xwidget-webkit-zoom (xwidget-webkit-current-session) -0.1))
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(defun xwidget-webkit-scroll-up ()
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"Scroll webkit up."
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(interactive)
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
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"window.scrollBy(0, 50);"))
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(defun xwidget-webkit-scroll-down ()
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"Scroll webkit down."
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(interactive)
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
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"window.scrollBy(0, -50);"))
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(defun xwidget-webkit-scroll-forward ()
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"Scroll webkit forwards."
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(interactive)
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
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"window.scrollBy(50, 0);"))
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(defun xwidget-webkit-scroll-backward ()
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"Scroll webkit backwards."
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(interactive)
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
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"window.scrollBy(-50, 0);"))
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(defun xwidget-webkit-scroll-top ()
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"Scroll webkit to the very top."
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(interactive)
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
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"window.scrollTo(pageXOffset, 0);"))
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(defun xwidget-webkit-scroll-bottom ()
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"Scroll webkit to the very bottom."
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(interactive)
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
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"window.scrollTo(pageXOffset, window.document.body.clientHeight);"))
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;; The xwidget event needs to go into a higher level handler
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;; since the xwidget can generate an event even if it's offscreen.
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;; TODO this needs to use callbacks and consider different xwidget event types.
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(define-key (current-global-map) [xwidget-event] #'xwidget-event-handler)
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(defun xwidget-log (&rest msg)
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"Log MSG to a buffer."
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(let ((buf (get-buffer-create " *xwidget-log*")))
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(with-current-buffer buf
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(insert (apply #'format msg))
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(insert "\n"))))
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(defun xwidget-event-handler ()
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"Receive xwidget event."
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(interactive)
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(xwidget-log "stuff happened to xwidget %S" last-input-event)
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(let*
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((xwidget-event-type (nth 1 last-input-event))
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(xwidget (nth 2 last-input-event))
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;;(xwidget-callback (xwidget-get xwidget 'callback))
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;;TODO stopped working for some reason
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)
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;;(funcall xwidget-callback xwidget xwidget-event-type)
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(message "xw callback %s" xwidget)
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(funcall 'xwidget-webkit-callback xwidget xwidget-event-type)))
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(defun xwidget-webkit-callback (xwidget xwidget-event-type)
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"Callback for xwidgets.
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XWIDGET instance, XWIDGET-EVENT-TYPE depends on the originating xwidget."
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(if (not (buffer-live-p (xwidget-buffer xwidget)))
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(xwidget-log
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"error: callback called for xwidget with dead buffer")
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(with-current-buffer (xwidget-buffer xwidget)
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(cond ((eq xwidget-event-type 'load-changed)
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(xwidget-webkit-execute-script
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xwidget "document.title"
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(lambda (title)
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(xwidget-log "webkit finished loading: '%s'" title)
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;;TODO - check the native/internal scroll
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;;(xwidget-adjust-size-to-content xwidget)
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(xwidget-webkit-adjust-size-to-window xwidget)
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(rename-buffer (format "*xwidget webkit: %s *" title))))
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(pop-to-buffer (current-buffer)))
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((eq xwidget-event-type 'decide-policy)
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(let ((strarg (nth 3 last-input-event)))
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(if (string-match ".*#\\(.*\\)" strarg)
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(xwidget-webkit-show-id-or-named-element
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xwidget
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(match-string 1 strarg)))))
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((eq xwidget-event-type 'javascript-callback)
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(let ((proc (nth 3 last-input-event))
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(arg (nth 4 last-input-event)))
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(funcall proc arg)))
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(t (xwidget-log "unhandled event:%s" xwidget-event-type))))))
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(defvar bookmark-make-record-function)
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(define-derived-mode xwidget-webkit-mode
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special-mode "xwidget-webkit" "Xwidget webkit view mode."
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(setq buffer-read-only t)
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(setq-local bookmark-make-record-function
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#'xwidget-webkit-bookmark-make-record)
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;; Keep track of [vh]scroll when switching buffers
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(image-mode-setup-winprops))
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(defun xwidget-webkit-bookmark-make-record ()
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"Integrate Emacs bookmarks with the webkit xwidget."
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(nconc (bookmark-make-record-default t t)
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`((page . ,(xwidget-webkit-current-url))
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(handler . (lambda (bmk) (browse-url
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(bookmark-prop-get bmk 'page)))))))
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(defvar xwidget-webkit-last-session-buffer nil)
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(defun xwidget-webkit-last-session ()
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"Last active webkit, or nil."
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(if (buffer-live-p xwidget-webkit-last-session-buffer)
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(with-current-buffer xwidget-webkit-last-session-buffer
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(xwidget-at (point-min)))
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nil))
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(defun xwidget-webkit-current-session ()
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"Either the webkit in the current buffer, or the last one used.
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The latter might be nil."
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(or (xwidget-at (point-min)) (xwidget-webkit-last-session)))
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(defun xwidget-adjust-size-to-content (xw)
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"Resize XW to content."
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;; xwidgets doesn't support widgets that have their own opinions about
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;; size well, yet this reads the desired size and resizes the Emacs
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;; allocated area accordingly.
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(let ((size (xwidget-size-request xw)))
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(xwidget-resize xw (car size) (cadr size))))
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(defvar xwidget-webkit-activeelement-js"
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function findactiveelement(doc){
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//alert(doc.activeElement.value);
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if(doc.activeElement.value != undefined){
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return doc.activeElement;
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}else{
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// recurse over the child documents:
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var frames = doc.getElementsByTagName('frame');
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for (var i = 0; i < frames.length; i++)
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{
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var d = frames[i].contentDocument;
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var rv = findactiveelement(d);
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if(rv != undefined){
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return rv;
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}
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}
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}
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return undefined;
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};
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"
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"javascript that finds the active element."
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;; Yes it's ugly, because:
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;; - there is apparently no way to find the active frame other than recursion
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;; - the js "for each" construct misbehaved on the "frames" collection
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;; - a window with no frameset still has frames.length == 1, but
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;; frames[0].document.activeElement != document.activeElement
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;;TODO the activeelement type needs to be examined, for iframe, etc.
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)
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(defun xwidget-webkit-insert-string ()
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"Prompt for a string and insert it in the active field in the
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current webkit widget."
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;; Read out the string in the field first and provide for edit.
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(interactive)
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(let ((xww (xwidget-webkit-current-session)))
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(xwidget-webkit-execute-script
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xww
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(concat xwidget-webkit-activeelement-js "
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(function () {
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var res = findactiveelement(document);
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return [res.value, res.type];
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})();")
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(lambda (field)
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(let ((str (pcase field
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(`[,val "text"]
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(read-string "Text: " val))
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(`[,val "password"]
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(read-passwd "Password: " nil val))
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(`[,val "textarea"]
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(xwidget-webkit-begin-edit-textarea xww val)))))
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(xwidget-webkit-execute-script
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xww
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(format "findactiveelement(document).value='%s'" str)))))))
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(defvar xwidget-xwbl)
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(defun xwidget-webkit-begin-edit-textarea (xw text)
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"Start editing of a webkit text area.
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XW is the xwidget identifier, TEXT is retrieved from the webkit."
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(switch-to-buffer
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(generate-new-buffer "textarea"))
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(set (make-local-variable 'xwidget-xwbl) xw)
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(insert text))
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(defun xwidget-webkit-end-edit-textarea ()
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"End editing of a webkit text area."
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(interactive)
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(goto-char (point-min))
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(while (search-forward "\n" nil t)
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(replace-match "\\n" nil t))
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(xwidget-webkit-execute-script
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xwidget-xwbl
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(format "findactiveelement(document).value='%s'"
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(buffer-substring (point-min) (point-max))))
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;;TODO convert linefeed to \n
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)
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(defun xwidget-webkit-show-element (xw element-selector)
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"Make webkit xwidget XW show a named element ELEMENT-SELECTOR.
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The ELEMENT-SELECTOR must be a valid CSS selector. For example,
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use this to display an anchor."
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(interactive (list (xwidget-webkit-current-session)
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(read-string "Element selector: ")))
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(xwidget-webkit-execute-script
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xw
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(format "
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(function (query) {
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var el = document.querySelector(query);
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if (el !== null) {
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window.scrollTo(0, el.offsetTop);
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}
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})('%s');"
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element-selector)))
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(defun xwidget-webkit-show-named-element (xw element-name)
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"Make webkit xwidget XW show a named element ELEMENT-NAME.
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For example, use this to display an anchor."
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(interactive (list (xwidget-webkit-current-session)
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(read-string "Element name: ")))
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;; TODO: This needs to be interfaced into browse-url somehow. The
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;; tricky part is that we need to do this in two steps: A: load the
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;; base url, wait for load signal to arrive B: navigate to the
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;; anchor when the base url is finished rendering
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(xwidget-webkit-execute-script
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xw
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(format "
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(function (query) {
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var el = document.getElementsByName(query)[0];
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if (el !== undefined) {
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window.scrollTo(0, el.offsetTop);
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}
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})('%s');"
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element-name)))
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(defun xwidget-webkit-show-id-element (xw element-id)
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"Make webkit xwidget XW show an id-element ELEMENT-ID.
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For example, use this to display an anchor."
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(interactive (list (xwidget-webkit-current-session)
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(read-string "Element id: ")))
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(xwidget-webkit-execute-script
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xw
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(format "
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(function (query) {
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var el = document.getElementById(query);
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if (el !== null) {
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window.scrollTo(0, el.offsetTop);
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}
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})('%s');"
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element-id)))
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(defun xwidget-webkit-show-id-or-named-element (xw element-id)
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"Make webkit xwidget XW show a name or element id ELEMENT-ID.
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For example, use this to display an anchor."
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(interactive (list (xwidget-webkit-current-session)
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(read-string "Name or element id: ")))
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(xwidget-webkit-execute-script
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xw
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(format "
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(function (query) {
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var el = document.getElementById(query) ||
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document.getElementsByName(query)[0];
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if (el !== undefined) {
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window.scrollTo(0, el.offsetTop);
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}
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})('%s');"
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element-id)))
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(defun xwidget-webkit-adjust-size-to-content ()
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"Adjust webkit to content size."
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(interactive)
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(xwidget-adjust-size-to-content (xwidget-webkit-current-session)))
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(defun xwidget-webkit-adjust-size-dispatch ()
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"Adjust size according to mode."
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(interactive)
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(xwidget-webkit-adjust-size-to-window (xwidget-webkit-current-session))
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;; The recenter is intended to correct a visual glitch.
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;; It errors out if the buffer isn't visible, but then we don't get
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;; the glitch, so silence errors.
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(ignore-errors
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(recenter-top-bottom)))
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(defun xwidget-webkit-adjust-size-to-window (xwidget &optional window)
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"Adjust the size of the webkit XWIDGET to fit the WINDOW."
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(xwidget-resize xwidget
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(window-pixel-width window)
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(window-pixel-height window)))
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(defun xwidget-webkit-adjust-size (w h)
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"Manually set webkit size to width W, height H."
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;; TODO shouldn't be tied to the webkit xwidget
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(interactive "nWidth:\nnHeight:\n")
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(xwidget-resize (xwidget-webkit-current-session) w h))
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(defun xwidget-webkit-fit-width ()
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"Adjust width of webkit to window width."
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(interactive)
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(xwidget-webkit-adjust-size (- (nth 2 (window-inside-pixel-edges))
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(car (window-inside-pixel-edges)))
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1000))
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(defun xwidget-webkit-auto-adjust-size (window)
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"Adjust the size of the webkit widget in the given WINDOW."
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(with-current-buffer (window-buffer window)
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(when (eq major-mode 'xwidget-webkit-mode)
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(let ((xwidget (xwidget-webkit-current-session)))
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(xwidget-webkit-adjust-size-to-window xwidget window)))))
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(defun xwidget-webkit-adjust-size-in-frame (frame)
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"Dynamically adjust webkit widget for all windows of the FRAME."
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(walk-windows 'xwidget-webkit-auto-adjust-size 'no-minibuf frame))
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(eval-after-load 'xwidget-webkit-mode
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(add-to-list 'window-size-change-functions
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'xwidget-webkit-adjust-size-in-frame))
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(defun xwidget-webkit-new-session (url)
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"Create a new webkit session buffer with URL."
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(let*
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((bufname (generate-new-buffer-name "*xwidget-webkit*"))
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xw)
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(setq xwidget-webkit-last-session-buffer (switch-to-buffer
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(get-buffer-create bufname)))
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;; The xwidget id is stored in a text property, so we need to have
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;; at least character in this buffer.
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(insert " ")
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(setq xw (xwidget-insert 1 'webkit bufname
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(window-pixel-width)
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(window-pixel-height)))
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(xwidget-put xw 'callback 'xwidget-webkit-callback)
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(xwidget-webkit-mode)
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(xwidget-webkit-goto-uri (xwidget-webkit-last-session) url)))
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(defun xwidget-webkit-goto-url (url)
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"Goto URL."
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(if (xwidget-webkit-current-session)
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(progn
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(xwidget-webkit-goto-uri (xwidget-webkit-current-session) url))
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(xwidget-webkit-new-session url)))
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(defun xwidget-webkit-back ()
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"Go back in history."
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(interactive)
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(xwidget-webkit-execute-script (xwidget-webkit-current-session)
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"history.go(-1);"))
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(defun xwidget-webkit-reload ()
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"Reload current url."
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(interactive)
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(xwidget-webkit-execute-script (xwidget-webkit-current-session)
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"history.go(0);"))
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|
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(defun xwidget-webkit-current-url ()
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"Get the webkit url and place it on the kill-ring."
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|
(interactive)
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(xwidget-webkit-execute-script
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|
(xwidget-webkit-current-session)
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"document.URL" (lambda (rv)
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(let ((url (kill-new (or rv ""))))
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(message "url: %s" url)))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun xwidget-webkit-get-selection (proc)
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"Get the webkit selection and pass it to PROC."
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(xwidget-webkit-execute-script
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(xwidget-webkit-current-session)
|
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"window.getSelection().toString();"
|
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proc))
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|
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(defun xwidget-webkit-copy-selection-as-kill ()
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|
"Get the webkit selection and put it on the kill-ring."
|
|
(interactive)
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|
(xwidget-webkit-get-selection (lambda (selection) (kill-new selection))))
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|
|
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|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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|
;; Xwidget plist management (similar to the process plist functions)
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|
|
|
(defun xwidget-get (xwidget propname)
|
|
"Get an xwidget's property value.
|
|
XWIDGET is an xwidget, PROPNAME a property.
|
|
Returns the last value stored with `xwidget-put'."
|
|
(plist-get (xwidget-plist xwidget) propname))
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|
|
|
(defun xwidget-put (xwidget propname value)
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|
"Set an xwidget's property value.
|
|
XWIDGET is an xwidget, PROPNAME a property to be set to specified VALUE.
|
|
You can retrieve the value with `xwidget-get'."
|
|
(set-xwidget-plist xwidget
|
|
(plist-put (xwidget-plist xwidget) propname value)))
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|
|
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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|
|
(defvar xwidget-view-list) ; xwidget.c
|
|
(defvar xwidget-list) ; xwidget.c
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|
|
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(defun xwidget-delete-zombies ()
|
|
"Helper for `xwidget-cleanup'."
|
|
(dolist (xwidget-view xwidget-view-list)
|
|
(when (or (not (window-live-p (xwidget-view-window xwidget-view)))
|
|
(not (memq (xwidget-view-model xwidget-view)
|
|
xwidget-list)))
|
|
(delete-xwidget-view xwidget-view))))
|
|
|
|
(defun xwidget-cleanup ()
|
|
"Delete zombie xwidgets."
|
|
;; During development it was sometimes easy to wind up with zombie
|
|
;; xwidget instances.
|
|
;; This function tries to implement a workaround should it occur again.
|
|
(interactive)
|
|
;; Kill xviews that should have been deleted but still linger.
|
|
(xwidget-delete-zombies)
|
|
;; Redraw display otherwise ghost of zombies will remain to haunt the screen
|
|
(redraw-display))
|
|
|
|
(defun xwidget-kill-buffer-query-function ()
|
|
"Ask before killing a buffer that has xwidgets."
|
|
(let ((xwidgets (get-buffer-xwidgets (current-buffer))))
|
|
(or (not xwidgets)
|
|
(not (memq t (mapcar #'xwidget-query-on-exit-flag xwidgets)))
|
|
(yes-or-no-p
|
|
(format "Buffer %S has xwidgets; kill it? " (buffer-name))))))
|
|
|
|
(when (featurep 'xwidget-internal)
|
|
(add-hook 'kill-buffer-query-functions #'xwidget-kill-buffer-query-function)
|
|
;; This would have felt better in C, but this seems to work well in
|
|
;; practice though.
|
|
(add-hook 'window-configuration-change-hook #'xwidget-delete-zombies))
|
|
|
|
(provide 'xwidget)
|
|
;;; xwidget.el ends here
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