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+;;; +link-hint.el -*- lexical-binding: t; -*-
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'link-hint)
+
+(defgroup +link-hint nil
+  "Extra customizations for `link-hint'."
+  :group 'link-hint)
+
+(defcustom +link-hint-open-secondary-types '(gnus-w3m-image-url
+                                             gnus-w3m-url
+                                             markdown-link
+                                             mu4e-attachment
+                                             mu4e-url
+                                             notmuch-hello
+                                             nov-link
+                                             org-link
+                                             shr-url
+                                             text-url
+                                             w3m-link
+                                             w3m-message-link)
+  "Link types to define `:open-secondary' for.")
+
+(defvar +link-hint-map (make-sparse-keymap)
+  "Keymap for `link-hint' functionality.")
+
+(cl-defmacro +link-hint-define-keyword (keyword handler docstring
+                                                &optional (types 'link-hint-types)
+                                                &rest rest
+                                                &key multiple &allow-other-keys)
+  "Set up a `link-hint' KEYWORD, with optional TYPES.
+If TYPES is not present, use `link-hint-types'.
+
+KEYWORD defines the link-hint type.  It will be used to create a
+function for opening links of the form \"link-hint-openKEYWORD\".
+
+HANDLER is the function to open a link with.
+
+DOCSTRING is the macro's documentation.
+
+Keyword arguments are passed to `link-hint-define-type' prefixed
+with the KEYWORD."
+  (declare (indent 2)
+           (doc-string 3))
+  (let ((types (symbol-value types))
+        (func-sym (intern (format "+link-hint-open%s" keyword)))
+        (mult-sym (intern (format "%s-multiple" keyword)))
+        (expr))
+    ;; Define the type
+    (push `(dolist (type ',types)
+             (link-hint-define-type type
+               ,keyword ,handler
+               ,@(mapcar (lambda (el)
+                           (if (eq el :multiple)
+                               mult-sym
+                             el))
+                         rest)))
+          expr)
+    ;; Define an opener
+    (push `(defun ,func-sym ()
+             ,(format "%s\n\nDefined by `+link-hint-define'." docstring)
+             (interactive)
+             (avy-with link-hint-open-link
+               (link-hint--one ,keyword)))
+          expr)
+    ;; Handle `:multiple'
+    (when multiple
+      (push `(defun ,(intern (format "+link-hint-open-multiple%s" keyword)) ()
+               ,(format "Open multiple links with `%s'.\n\nDefined by `+link-hint-define'."
+                        func-sym)
+               (avy-with link-hint-open-multiple-links
+                 (link-hint--multiple ,keyword)))
+            expr)
+      (push `(defun ,(intern (format "+link-hint-open-all%s" keyword)) ()
+               ,(format "Open all visible links with `%s'.\n\nDefined by `+link-hint-define'."
+                        func-sym)
+               (avy-with link-hint-open-all-links
+                 (link-hint--all ,keyword)))
+            expr))
+    ;; Return the built expression
+    `(progn ,@(nreverse expr))))
+
+(+link-hint-define-keyword :secondary browse-url-secondary-browser-function
+  "Open a link in the secondary browser."
+  +link-hint-open-secondary-types
+  :multiple t)
+
+(defun +link-hint-open-secondary-setup (&optional types)
+  "Define the `:open-secondary' link-hint type for TYPES.
+If TYPES is nil, define it for `+link-hint-open-secondary-types'."
+  (dolist (type (or types +link-hint-open-secondary-types))
+    (link-hint-define-type type
+      :open-secondary browse-url-secondary-browser-function
+      :open-secondary-multiple t)))
+
+(defun +link-hint-open-secondary ()
+  "Open a link in the secondary browser."
+  (interactive)
+  (avy-with link-hint-open-link
+    (link-hint--one :open-secondary)))
+
+(defun +link-hint-open-chrome-setup (&optional types)
+  "Define the `:open-chrome' link-hint type for TYPES.
+If TYPES is nil, define it for `+link-hint-open-secondary-types'."
+  (dolist (type (or types +link-hint-open-secondary-types))
+    (link-hint-define-type type
+      :open-chrome #'browse-url-chrome
+      :open-chrome-multiple t)))
+
+(defun +link-hint-open-chrome ()
+  "Open a link with chrome."
+  (interactive)
+  (avy-with link-hint-open-link
+    (link-hint--one :open-chrome)))
+
+(defun +link-hint-open-link (prefix)
+  "Open a link.
+Without a PREFIX, open using `browse-url-browser-function'; with
+a PREFIX, use `browse-url-secondary-browser-function'."
+  (interactive "P")
+  (let ((current-prefix-arg nil))
+    (avy-with link-hint-open-link
+      (link-hint--one (if prefix :open-secondary :open)))))
+
+;; test: https://www.acdw.net
+
+(defun +link-hint-open-multiple-links (prefix)
+  "Open multiple links.
+Without a PREFIX, open using `browse-url-browser-function'; with
+a PREFIX, use `browse-url-secondary-browser-function'."
+  (interactive "P")
+  (avy-with link-hint-open-multiple-links
+    (link-hint--one (if prefix :open-secondary :open))))
+
+(defun +link-hint-open-all-links (prefix)
+  "Open all visible links.
+Without a PREFIX, open using `browse-url-browser-function'; with
+a PREFIX, use `browse-url-secondary-browser-function'."
+  (interactive "P")
+  (avy-with link-hint-open-all-links
+    (link-hint--one (if prefix :open-secondary :open))))
+
+(provide '+link-hint)
+;;; +link-hint.el ends here