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;;; helm-net.el --- helm browse url and search web. -*- lexical-binding: t -*-
;; Copyright (C) 2012 ~ 2019 Thierry Volpiatto <thierry.volpiatto@gmail.com>
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Code:
(require 'cl-lib)
(require 'helm)
(require 'helm-help)
(require 'url)
(require 'xml)
(require 'browse-url)
(defgroup helm-net nil
"Net related applications and libraries for Helm."
:group 'helm)
(defcustom helm-google-suggest-default-browser-function nil
"The browse url function you prefer to use with google suggest.
When nil, use the first browser function available
See `helm-browse-url-default-browser-alist'."
:group 'helm-net
:type 'symbol)
(defcustom helm-home-url "https://www.google.com"
"Default url to use as home url."
:group 'helm-net
:type 'string)
(defcustom helm-surfraw-default-browser-function nil
"The browse url function you prefer to use with surfraw.
When nil, fallback to `browse-url-browser-function'."
:group 'helm-net
:type 'symbol)
(defcustom helm-google-suggest-url
"https://encrypted.google.com/complete/search?output=toolbar&q=%s"
"URL used for looking up Google suggestions.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defcustom helm-google-suggest-search-url
"https://encrypted.google.com/search?ie=utf-8&oe=utf-8&q=%s"
"URL used for Google searching.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defvaralias 'helm-google-suggest-use-curl-p 'helm-net-prefer-curl)
(make-obsolete-variable 'helm-google-suggest-use-curl-p 'helm-net-prefer-curl "1.7.7")
(defcustom helm-net-prefer-curl nil
"When non--nil use CURL external program to fetch data.
Otherwise `url-retrieve-synchronously' is used."
:type 'boolean
:group 'helm-net)
(defcustom helm-surfraw-duckduckgo-url
"https://duckduckgo.com/lite/?q=%s&kp=1"
"The duckduckgo url.
This is a format string, don't forget the `%s'.
If you have personal settings saved on duckduckgo you should have
a personal url, see your settings on duckduckgo."
:type 'string
:group 'helm-net)
(defcustom helm-search-suggest-action-wikipedia-url
"https://en.wikipedia.org/wiki/Special:Search?search=%s"
"The Wikipedia search url.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defcustom helm-search-suggest-action-youtube-url
"https://www.youtube.com/results?aq=f&search_query=%s"
"The Youtube search url.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defcustom helm-search-suggest-action-imdb-url
"http://www.imdb.com/find?s=all&q=%s"
"The IMDb search url.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defcustom helm-search-suggest-action-google-maps-url
"https://maps.google.com/maps?f=q&source=s_q&q=%s"
"The Google Maps search url.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defcustom helm-search-suggest-action-google-news-url
"https://www.google.com/search?safe=off&prmd=nvlifd&source=lnms&tbs=nws:1&q=%s"
"The Google News search url.
This is a format string, don't forget the `%s'."
:type 'string
:group 'helm-net)
(defcustom helm-google-suggest-actions
'(("Google Search" . helm-google-suggest-action)
("Wikipedia" . (lambda (candidate)
(helm-search-suggest-perform-additional-action
helm-search-suggest-action-wikipedia-url
candidate)))
("Youtube" . (lambda (candidate)
(helm-search-suggest-perform-additional-action
helm-search-suggest-action-youtube-url
candidate)))
("IMDb" . (lambda (candidate)
(helm-search-suggest-perform-additional-action
helm-search-suggest-action-imdb-url
candidate)))
("Google Maps" . (lambda (candidate)
(helm-search-suggest-perform-additional-action
helm-search-suggest-action-google-maps-url
candidate)))
("Google News" . (lambda (candidate)
(helm-search-suggest-perform-additional-action
helm-search-suggest-action-google-news-url
candidate))))
"List of actions for google suggest sources."
:group 'helm-net
:type '(alist :key-type string :value-type function))
(defcustom helm-browse-url-firefox-new-window "-new-tab"
"Allow choosing to browse url in new window or new tab.
Can be \"-new-tab\" (default) or \"-new-window\"."
:group 'helm-net
:type '(radio
(const :tag "New tab" "-new-tab")
(const :tag "New window" "-new-window")))
(defcustom helm-net-curl-switches '("-s" "-L")
"Arguments list passed to curl when using `helm-net-prefer-curl'."
:group 'helm-net
:type '(repeat string))
;;; Additional actions for search suggestions
;;
;;
;; Internal
(defun helm-search-suggest-perform-additional-action (url query)
"Perform the search via URL using QUERY as input."
(browse-url (format url (url-hexify-string query))))
(defun helm-net--url-retrieve-sync (request parser)
(if helm-net-prefer-curl
(with-temp-buffer
(apply #'call-process "curl"
nil t nil request helm-net-curl-switches)
(funcall parser))
(with-current-buffer (url-retrieve-synchronously request)
(funcall parser))))
;;; Google Suggestions
;;
;;
(defun helm-google-suggest-parser ()
(cl-loop
with result-alist = (xml-get-children
(car (xml-parse-region
(point-min) (point-max)))
'CompleteSuggestion)
for i in result-alist collect
(cdr (cl-caadr (assq 'suggestion i)))))
(defun helm-google-suggest-fetch (input)
"Fetch suggestions for INPUT from XML buffer."
(let ((request (format helm-google-suggest-url
(url-hexify-string input))))
(helm-net--url-retrieve-sync
request #'helm-google-suggest-parser)))
(defun helm-google-suggest-set-candidates (&optional request-prefix)
"Set candidates with result and number of google results found."
(let ((suggestions (helm-google-suggest-fetch
(or (and request-prefix
(concat request-prefix
" " helm-pattern))
helm-pattern))))
(if (member helm-pattern suggestions)
suggestions
;; if there is no suggestion exactly matching the input then
;; prepend a Search on Google item to the list
(append
suggestions
(list (cons (format "Search for '%s' on Google" helm-input)
helm-input))))))
(defun helm-ggs-set-number-result (num)
(if num
(progn
(and (numberp num) (setq num (number-to-string num)))
(cl-loop for i in (reverse (split-string num "" t))
for count from 1
append (list i) into C
when (= count 3)
append (list ",") into C
and do (setq count 0)
finally return
(replace-regexp-in-string
"^," "" (mapconcat 'identity (reverse C) ""))))
"?"))
(defun helm-google-suggest-action (candidate)
"Default action to jump to a google suggested candidate."
(let ((arg (format helm-google-suggest-search-url
(url-hexify-string candidate))))
(helm-aif helm-google-suggest-default-browser-function
(funcall it arg)
(helm-browse-url arg))))
(defvar helm-google-suggest-default-function
'helm-google-suggest-set-candidates
"Default function to use in helm google suggest.")
(defvar helm-source-google-suggest
(helm-build-sync-source "Google Suggest"
:candidates (lambda ()
(funcall helm-google-suggest-default-function))
:action 'helm-google-suggest-actions
:volatile t
:keymap helm-map
:requires-pattern 3))
(defun helm-google-suggest-emacs-lisp ()
"Try to emacs lisp complete with google suggestions."
(helm-google-suggest-set-candidates "emacs lisp"))
;;; Web browser functions.
;;
;;
;; If default setting of `w3m-command' is not
;; what you want and you modify it, you will have to reeval
;; also `helm-browse-url-default-browser-alist'.
(defvar helm-browse-url-chromium-program "chromium-browser")
(defvar helm-browse-url-uzbl-program "uzbl-browser")
(defvar helm-browse-url-conkeror-program "conkeror")
(defvar helm-browse-url-opera-program "opera")
(defvar helm-browse-url-default-browser-alist
`((,(or (and (boundp 'w3m-command) w3m-command)
"/usr/bin/w3m") . w3m-browse-url)
(,browse-url-firefox-program . browse-url-firefox)
(,helm-browse-url-chromium-program . helm-browse-url-chromium)
(,helm-browse-url-conkeror-program . helm-browse-url-conkeror)
(,helm-browse-url-opera-program . helm-browse-url-opera)
(,helm-browse-url-uzbl-program . helm-browse-url-uzbl)
(,browse-url-kde-program . browse-url-kde)
(,browse-url-gnome-moz-program . browse-url-gnome-moz)
(,browse-url-mozilla-program . browse-url-mozilla)
(,browse-url-galeon-program . browse-url-galeon)
(,browse-url-netscape-program . browse-url-netscape)
(,browse-url-mosaic-program . browse-url-mosaic)
(,browse-url-xterm-program . browse-url-text-xterm)
("emacs" . eww-browse-url))
"*Alist of \(executable . function\) to try to find a suitable url browser.")
(cl-defun helm-generic-browser (url cmd-name &rest args)
"Browse URL with NAME browser."
(let ((proc (concat cmd-name " " url)))
(message "Starting %s..." cmd-name)
(apply 'start-process proc nil cmd-name
(append args (list url)))
(set-process-sentinel
(get-process proc)
(lambda (process event)
(when (string= event "finished\n")
(message "%s process %s" process event))))))
;;;###autoload
(defun helm-browse-url-firefox (url &optional _ignore)
"Same as `browse-url-firefox' but detach from emacs.
So when you quit emacs you can keep your firefox session open
and not be prompted to kill firefox process.
NOTE: Probably not supported on some systems (e.g Windows)."
(interactive (list (read-string "URL: " (browse-url-url-at-point))
nil))
(setq url (browse-url-encode-url url))
(let ((process-environment (browse-url-process-environment)))
(call-process-shell-command
(format "(%s %s %s &)"
browse-url-firefox-program
helm-browse-url-firefox-new-window
(shell-quote-argument url)))))
;;;###autoload
(defun helm-browse-url-opera (url &optional _ignore)
"Browse URL with opera browser and detach from emacs.
So when you quit emacs you can keep your opera session open
and not be prompted to kill opera process.
NOTE: Probably not supported on some systems (e.g Windows)."
(interactive (list (read-string "URL: " (browse-url-url-at-point))
nil))
(setq url (browse-url-encode-url url))
(let ((process-environment (browse-url-process-environment)))
(call-process-shell-command
(format "(%s %s &)"
helm-browse-url-opera-program (shell-quote-argument url)))))
;;;###autoload
(defun helm-browse-url-chromium (url &optional _ignore)
"Browse URL with google chrome browser."
(interactive "sURL: ")
(helm-generic-browser
url helm-browse-url-chromium-program))
;;;###autoload
(defun helm-browse-url-uzbl (url &optional _ignore)
"Browse URL with uzbl browser."
(interactive "sURL: ")
(helm-generic-browser url helm-browse-url-uzbl-program "-u"))
;;;###autoload
(defun helm-browse-url-conkeror (url &optional _ignore)
"Browse URL with conkeror browser."
(interactive "sURL: ")
(helm-generic-browser url helm-browse-url-conkeror-program))
(defun helm-browse-url-default-browser (url &rest args)
"Find the first available browser and ask it to load URL."
(let ((default-browser-fn
(cl-loop for (exe . fn) in helm-browse-url-default-browser-alist
thereis (and exe (executable-find exe) (fboundp fn) fn))))
(if default-browser-fn
(apply default-browser-fn url args)
(error "No usable browser found"))))
(defun helm-browse-url (url &rest args)
"Default command to browse URL."
(if browse-url-browser-function
(browse-url url args)
(helm-browse-url-default-browser url args)))
;;; Surfraw
;;
;; Need external program surfraw.
;; <http://surfraw.alioth.debian.org/>
;; Internal
(defvar helm-surfraw-engines-history nil)
(defvar helm-surfraw-input-history nil)
(defvar helm-surfraw--elvi-cache nil)
(defun helm-build-elvi-list ()
"Return list of all engines and descriptions handled by surfraw."
(or helm-surfraw--elvi-cache
(setq helm-surfraw--elvi-cache
(cdr (with-temp-buffer
(call-process "surfraw" nil t nil "-elvi")
(split-string (buffer-string) "\n"))))))
;;;###autoload
(defun helm-surfraw (pattern engine)
"Preconfigured `helm' to search PATTERN with search ENGINE."
(interactive
(list
(let* ((default (if (use-region-p)
(buffer-substring-no-properties
(region-beginning) (region-end))
(thing-at-point 'symbol)))
(prompt (if default
(format "SearchFor (default %s): " default)
"SearchFor: ")))
(read-string prompt nil 'helm-surfraw-input-history default))
(helm-comp-read
"Engine: "
(helm-build-elvi-list)
:must-match t
:name "Surfraw Search Engines"
:del-input nil
:history helm-surfraw-engines-history)))
(let* ((engine-nodesc (car (split-string engine)))
(url (if (string= engine-nodesc "duckduckgo")
;; "sr duckduckgo -p foo" is broken, workaround.
(format helm-surfraw-duckduckgo-url
(url-hexify-string pattern))
(with-temp-buffer
(apply 'call-process "surfraw" nil t nil
(append (list engine-nodesc "-p") (split-string pattern)))
(replace-regexp-in-string
"\n" "" (buffer-string)))))
(browse-url-browser-function (or helm-surfraw-default-browser-function
browse-url-browser-function)))
(if (string= engine-nodesc "W")
(helm-browse-url helm-home-url)
(helm-browse-url url)
(setq helm-surfraw-engines-history
(cons engine (delete engine helm-surfraw-engines-history))))))
;;;###autoload
(defun helm-google-suggest ()
"Preconfigured `helm' for google search with google suggest."
(interactive)
(helm-other-buffer 'helm-source-google-suggest "*helm google*"))
(provide 'helm-net)
;; Local Variables:
;; byte-compile-warnings: (not obsolete)
;; coding: utf-8
;; indent-tabs-mode: nil
;; End:
;;; helm-net.el ends here