* mail/rmail.el (rmail-show-message-1): When displaying a mime message,

       indicate start and finish in the echo area.

       * mail/rmail.el (rmail-epa-decrypt): Disregard <pre> before armor.
       Ignore more kinds of whitespace in mime headers.
       Modify the decrypted mime part's mime type so it will be displayed
       by default when visiting this message again.

       * net/browse-url.el (browse-url-firefox-program): Prefer IceCat, doc.
       (browse-url-firefox-arguments)
       (browse-url-firefox-startup-arguments): Doc fix.

1 files changed, 212 insertions, 180 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index d340550a017..67b44aa1bbe 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -4,7 +4,7 @@
 
 ;; Author: Fabián E. Gallina <fabian@anue.biz>
 ;; URL: https://github.com/fgallina/python.el
-;; Version: 0.24.4
+;; Version: 0.24.5
 ;; Maintainer: emacs-devel@gnu.org
 ;; Created: Jul 2010
 ;; Keywords: languages
@@ -696,6 +696,12 @@ It makes underscores and dots word constituent chars.")
   :group 'python
   :safe 'booleanp)
 
+(defcustom python-indent-guess-indent-offset-verbose t
+  "Non-nil means to emit a warning when indentation guessing fails."
+  :type 'boolean
+  :group 'python
+  :safe' booleanp)
+
 (defcustom python-indent-trigger-commands
   '(indent-for-tab-command yas-expand yas/expand)
   "Commands that might trigger a `python-indent-line' call."
@@ -766,8 +772,9 @@ work on `python-indent-calculate-indentation' instead."
                  (current-indentation))))
           (if (and indentation (not (zerop indentation)))
               (set (make-local-variable 'python-indent-offset) indentation)
-            (message "Can't guess python-indent-offset, using defaults: %s"
-                     python-indent-offset)))))))
+            (when python-indent-guess-indent-offset-verbose
+              (message "Can't guess python-indent-offset, using defaults: %s"
+                       python-indent-offset))))))))
 
 (defun python-indent-context ()
   "Get information about the current indentation context.
@@ -843,15 +850,6 @@ keyword
        ;; Beginning of buffer.
        ((= (line-number-at-pos) 1)
         (cons :no-indent 0))
-       ;; Comment continuation (maybe).
-       ((save-excursion
-          (when (and
-                 (or
-                  (python-info-current-line-comment-p)
-                  (python-info-current-line-empty-p))
-                 (forward-comment -1)
-                 (python-info-current-line-comment-p))
-            (cons :after-comment (point)))))
        ;; Inside a string.
        ((let ((start (python-syntax-context 'string ppss)))
           (when start
@@ -963,28 +961,29 @@ keyword
        ((let ((start (python-info-dedenter-statement-p)))
           (when start
             (cons :at-dedenter-block-start start))))
-       ;; After normal line.
-       ((let ((start (save-excursion
-                       (back-to-indentation)
-                       (skip-chars-backward " \t\n")
-                       (python-nav-beginning-of-statement)
-                       (point))))
-          (when start
-            (if (save-excursion
-                  (python-util-forward-comment -1)
-                  (python-nav-beginning-of-statement)
-                  (looking-at (python-rx block-ender)))
-                (cons :after-block-end start)
-              (cons :after-line start)))))
-       ;; Default case: do not indent.
-       (t (cons :no-indent 0))))))
+       ;; After normal line, comment or ender (default case).
+       ((save-excursion
+          (back-to-indentation)
+          (skip-chars-backward " \t\n")
+          (python-nav-beginning-of-statement)
+          (cons
+           (cond ((python-info-current-line-comment-p)
+                  :after-comment)
+                 ((save-excursion
+                    (goto-char (line-end-position))
+                    (python-util-forward-comment -1)
+                    (python-nav-beginning-of-statement)
+                    (looking-at (python-rx block-ender)))
+                  :after-block-end)
+                 (t :after-line))
+           (point))))))))
 
 (defun python-indent--calculate-indentation ()
   "Internal implementation of `python-indent-calculate-indentation'.
 May return an integer for the maximum possible indentation at
 current context or a list of integers.  The latter case is only
 happening for :at-dedenter-block-start context since the
-possibilities can be narrowed to especific indentation points."
+possibilities can be narrowed to specific indentation points."
   (save-restriction
     (widen)
     (save-excursion
@@ -1068,12 +1067,14 @@ minimum."
          (levels (python-indent--calculate-levels indentation)))
     (if previous
         (python-indent--previous-level levels (current-indentation))
-      (apply #'max levels))))
+      (if levels
+          (apply #'max levels)
+        0))))
 
 (defun python-indent-line (&optional previous)
   "Internal implementation of `python-indent-line-function'.
 Use the PREVIOUS level when argument is non-nil, otherwise indent
-to the maxium available level.  When indentation is the minimum
+to the maximum available level.  When indentation is the minimum
 possible and PREVIOUS is non-nil, cycle back to the maximum
 level."
   (let ((follow-indentation-p
@@ -1108,9 +1109,7 @@ indentation levels from right to left."
   (interactive "*")
   (when (and (not (bolp))
            (not (python-syntax-comment-or-string-p))
-           (= (+ (line-beginning-position)
-                 (current-indentation))
-              (point)))
+           (= (current-indentation) (current-column)))
       (python-indent-line t)
       t))
 
@@ -2295,16 +2294,15 @@ Signals an error if no shell buffer is available for current buffer."
       (let ((process-name
              (process-name (get-buffer-process (current-buffer)))))
         (generate-new-buffer
-         (format "*%s-font-lock*" process-name))))))
+         (format " *%s-font-lock*" process-name))))))
 
 (defun python-shell-font-lock-kill-buffer ()
   "Kill the font-lock buffer safely."
-  (python-shell-with-shell-buffer
-    (when (and python-shell--font-lock-buffer
-               (buffer-live-p python-shell--font-lock-buffer))
-      (kill-buffer python-shell--font-lock-buffer)
-      (when (derived-mode-p 'inferior-python-mode)
-        (setq python-shell--font-lock-buffer nil)))))
+  (when (and python-shell--font-lock-buffer
+             (buffer-live-p python-shell--font-lock-buffer))
+    (kill-buffer python-shell--font-lock-buffer)
+    (when (derived-mode-p 'inferior-python-mode)
+      (setq python-shell--font-lock-buffer nil))))
 
 (defmacro python-shell-font-lock-with-font-lock-buffer (&rest body)
   "Execute the forms in BODY in the font-lock buffer.
@@ -2318,6 +2316,8 @@ also `with-current-buffer'."
          (setq python-shell--font-lock-buffer
                (python-shell-font-lock-get-or-create-buffer)))
        (set-buffer python-shell--font-lock-buffer)
+       (when (not font-lock-mode)
+         (font-lock-mode 1))
        (set (make-local-variable 'delay-mode-hooks) t)
        (let ((python-indent-guess-indent-offset nil))
          (when (not (derived-mode-p 'python-mode))
@@ -2331,57 +2331,66 @@ goes wrong and syntax highlighting in the shell gets messed up."
   (interactive)
   (python-shell-with-shell-buffer
     (python-shell-font-lock-with-font-lock-buffer
-      (delete-region (point-min) (point-max)))))
+      (erase-buffer))))
 
 (defun python-shell-font-lock-comint-output-filter-function (output)
   "Clean up the font-lock buffer after any OUTPUT."
-  (when (and (not (string= "" output))
-             ;; Is end of output and is not just a prompt.
-             (not (member
-                   (python-shell-comint-end-of-output-p
-                    (ansi-color-filter-apply output))
-                   '(nil 0))))
-    ;; If output is other than an input prompt then "real" output has
-    ;; been received and the font-lock buffer must be cleaned up.
-    (python-shell-font-lock-cleanup-buffer))
+  (if (and (not (string= "" output))
+           ;; Is end of output and is not just a prompt.
+           (not (member
+                 (python-shell-comint-end-of-output-p
+                  (ansi-color-filter-apply output))
+                 '(nil 0))))
+      ;; If output is other than an input prompt then "real" output has
+      ;; been received and the font-lock buffer must be cleaned up.
+      (python-shell-font-lock-cleanup-buffer)
+    ;; Otherwise just add a newline.
+    (python-shell-font-lock-with-font-lock-buffer
+      (goto-char (point-max))
+      (newline)))
   output)
 
 (defun python-shell-font-lock-post-command-hook ()
   "Fontifies current line in shell buffer."
-  (if (eq this-command 'comint-send-input)
-      ;; Add a newline when user sends input as this may be a block.
-      (python-shell-font-lock-with-font-lock-buffer
-        (goto-char (line-end-position))
-        (newline))
-    (when (and (python-util-comint-last-prompt)
-               (> (point) (cdr (python-util-comint-last-prompt))))
-      (let ((input (buffer-substring-no-properties
-                    (cdr (python-util-comint-last-prompt)) (point-max)))
-            (old-input (python-shell-font-lock-with-font-lock-buffer
-                         (buffer-substring-no-properties
-                          (line-beginning-position) (point-max))))
-            (current-point (point))
-            (buffer-undo-list t))
-        ;; When input hasn't changed, do nothing.
-        (when (not (string= input old-input))
-          (delete-region (cdr (python-util-comint-last-prompt)) (point-max))
-          (insert
-           (python-shell-font-lock-with-font-lock-buffer
-             (delete-region (line-beginning-position)
-                            (line-end-position))
-             (insert input)
-             ;; Ensure buffer is fontified, keeping it
-             ;; compatible with Emacs < 24.4.
-             (if (fboundp 'font-lock-ensure)
-                 (funcall 'font-lock-ensure)
-               (font-lock-default-fontify-buffer))
-             ;; Replace FACE text properties with FONT-LOCK-FACE so
-             ;; they are not overwritten by comint buffer's font lock.
-             (python-util-text-properties-replace-name
-              'face 'font-lock-face)
-             (buffer-substring (line-beginning-position)
-                               (line-end-position))))
-          (goto-char current-point))))))
+  (let ((prompt-end (cdr (python-util-comint-last-prompt))))
+    (when (and prompt-end (> (point) prompt-end)
+               (process-live-p (get-buffer-process (current-buffer))))
+      (let* ((input (buffer-substring-no-properties
+                     prompt-end (point-max)))
+             (deactivate-mark nil)
+             (start-pos prompt-end)
+             (buffer-undo-list t)
+             (font-lock-buffer-pos nil)
+             (replacement
+              (python-shell-font-lock-with-font-lock-buffer
+                (delete-region (line-beginning-position)
+                               (point-max))
+                (setq font-lock-buffer-pos (point))
+                (insert input)
+                ;; Ensure buffer is fontified, keeping it
+                ;; compatible with Emacs < 24.4.
+                (if (fboundp 'font-lock-ensure)
+                    (funcall 'font-lock-ensure)
+                  (font-lock-default-fontify-buffer))
+                (buffer-substring font-lock-buffer-pos
+                                  (point-max))))
+             (replacement-length (length replacement))
+             (i 0))
+        ;; Inject text properties to get input fontified.
+        (while (not (= i replacement-length))
+          (let* ((plist (text-properties-at i replacement))
+                 (next-change (or (next-property-change i replacement)
+                                  replacement-length))
+                 (plist (let ((face (plist-get plist 'face)))
+                          (if (not face)
+                              plist
+                            ;; Replace FACE text properties with
+                            ;; FONT-LOCK-FACE so input is fontified.
+                            (plist-put plist 'face nil)
+                            (plist-put plist 'font-lock-face face)))))
+            (set-text-properties
+             (+ start-pos i) (+ start-pos next-change) plist)
+            (setq i next-change)))))))
 
 (defun python-shell-font-lock-turn-on (&optional msg)
   "Turn on shell font-lock.
@@ -2414,7 +2423,7 @@ With argument MSG show deactivation message."
        '(face nil font-lock-face nil)))
     (set (make-local-variable 'python-shell--font-lock-buffer) nil)
     (remove-hook 'post-command-hook
-                 #'python-shell-font-lock-post-command-hook'local)
+                 #'python-shell-font-lock-post-command-hook 'local)
     (remove-hook 'kill-buffer-hook
                  #'python-shell-font-lock-kill-buffer 'local)
     (remove-hook 'comint-output-filter-functions
@@ -3148,67 +3157,68 @@ With argument MSG show activation/deactivation message."
   "Get completions using native readline for PROCESS.
 When IMPORT is non-nil takes precedence over INPUT for
 completion."
-  (when (and python-shell-completion-native-enable
-             (python-util-comint-last-prompt)
-             (>= (point) (cdr (python-util-comint-last-prompt))))
-    (let* ((input (or import input))
-           (original-filter-fn (process-filter process))
-           (redirect-buffer (get-buffer-create
-                             python-shell-completion-native-redirect-buffer))
-           (separators (python-rx
-                        (or whitespace open-paren close-paren)))
-           (trigger "\t\t\t")
-           (new-input (concat input trigger))
-           (input-length
-            (save-excursion
-              (+ (- (point-max) (comint-bol)) (length new-input))))
-           (delete-line-command (make-string input-length ?\b))
-           (input-to-send (concat new-input delete-line-command)))
-      ;; Ensure restoring the process filter, even if the user quits
-      ;; or there's some other error.
-      (unwind-protect
-          (with-current-buffer redirect-buffer
-            ;; Cleanup the redirect buffer
-            (delete-region (point-min) (point-max))
-            ;; Mimic `comint-redirect-send-command', unfortunately it
-            ;; can't be used here because it expects a newline in the
-            ;; command and that's exactly what we are trying to avoid.
-            (let ((comint-redirect-echo-input nil)
-                  (comint-redirect-verbose nil)
-                  (comint-redirect-perform-sanity-check nil)
-                  (comint-redirect-insert-matching-regexp nil)
-                  ;; Feed it some regex that will never match.
-                  (comint-redirect-finished-regexp "^\\'$")
-                  (comint-redirect-output-buffer redirect-buffer))
-              ;; Compatibility with Emacs 24.x.  Comint changed and
-              ;; now `comint-redirect-filter' gets 3 args.  This
-              ;; checks which version of `comint-redirect-filter' is
-              ;; in use based on its args and uses `apply-partially'
-              ;; to make it up for the 3 args case.
-              (if (= (length
-                      (help-function-arglist 'comint-redirect-filter)) 3)
-                  (set-process-filter
-                   process (apply-partially
-                            #'comint-redirect-filter original-filter-fn))
-                (set-process-filter process #'comint-redirect-filter))
-              (process-send-string process input-to-send)
-              (accept-process-output
-               process
-               python-shell-completion-native-output-timeout)
-              ;; XXX: can't use `python-shell-accept-process-output'
-              ;; here because there are no guarantees on how output
-              ;; ends.  The workaround here is to call
-              ;; `accept-process-output' until we don't find anything
-              ;; else to accept.
-              (while (accept-process-output
-                      process
-                      python-shell-completion-native-output-timeout))
-              (cl-remove-duplicates
-               (split-string
-                (buffer-substring-no-properties
-                 (point-min) (point-max))
-                separators t))))
-        (set-process-filter process original-filter-fn)))))
+  (with-current-buffer (process-buffer process)
+    (when (and python-shell-completion-native-enable
+               (python-util-comint-last-prompt)
+               (>= (point) (cdr (python-util-comint-last-prompt))))
+      (let* ((input (or import input))
+             (original-filter-fn (process-filter process))
+             (redirect-buffer (get-buffer-create
+                               python-shell-completion-native-redirect-buffer))
+             (separators (python-rx
+                          (or whitespace open-paren close-paren)))
+             (trigger "\t\t\t")
+             (new-input (concat input trigger))
+             (input-length
+              (save-excursion
+                (+ (- (point-max) (comint-bol)) (length new-input))))
+             (delete-line-command (make-string input-length ?\b))
+             (input-to-send (concat new-input delete-line-command)))
+        ;; Ensure restoring the process filter, even if the user quits
+        ;; or there's some other error.
+        (unwind-protect
+            (with-current-buffer redirect-buffer
+              ;; Cleanup the redirect buffer
+              (delete-region (point-min) (point-max))
+              ;; Mimic `comint-redirect-send-command', unfortunately it
+              ;; can't be used here because it expects a newline in the
+              ;; command and that's exactly what we are trying to avoid.
+              (let ((comint-redirect-echo-input nil)
+                    (comint-redirect-verbose nil)
+                    (comint-redirect-perform-sanity-check nil)
+                    (comint-redirect-insert-matching-regexp nil)
+                    ;; Feed it some regex that will never match.
+                    (comint-redirect-finished-regexp "^\\'$")
+                    (comint-redirect-output-buffer redirect-buffer))
+                ;; Compatibility with Emacs 24.x.  Comint changed and
+                ;; now `comint-redirect-filter' gets 3 args.  This
+                ;; checks which version of `comint-redirect-filter' is
+                ;; in use based on its args and uses `apply-partially'
+                ;; to make it up for the 3 args case.
+                (if (= (length
+                        (help-function-arglist 'comint-redirect-filter)) 3)
+                    (set-process-filter
+                     process (apply-partially
+                              #'comint-redirect-filter original-filter-fn))
+                  (set-process-filter process #'comint-redirect-filter))
+                (process-send-string process input-to-send)
+                (accept-process-output
+                 process
+                 python-shell-completion-native-output-timeout)
+                ;; XXX: can't use `python-shell-accept-process-output'
+                ;; here because there are no guarantees on how output
+                ;; ends.  The workaround here is to call
+                ;; `accept-process-output' until we don't find anything
+                ;; else to accept.
+                (while (accept-process-output
+                        process
+                        python-shell-completion-native-output-timeout))
+                (cl-remove-duplicates
+                 (split-string
+                  (buffer-substring-no-properties
+                   (point-min) (point-max))
+                  separators t))))
+          (set-process-filter process original-filter-fn))))))
 
 (defun python-shell-completion-get-completions (process import input)
   "Do completion at point using PROCESS for IMPORT or INPUT.
@@ -3251,20 +3261,23 @@ completion."
 Optional argument PROCESS forces completions to be retrieved
 using that one instead of current buffer's process."
   (setq process (or process (get-buffer-process (current-buffer))))
-  (let* ((last-prompt-end (cdr (python-util-comint-last-prompt)))
+  (let* ((line-start (if (derived-mode-p 'inferior-python-mode)
+                         ;; Working on a shell buffer: use prompt end.
+                         (cdr (python-util-comint-last-prompt))
+                       (line-beginning-position)))
          (import-statement
           (when (string-match-p
                  (rx (* space) word-start (or "from" "import") word-end space)
-                 (buffer-substring-no-properties last-prompt-end (point)))
-            (buffer-substring-no-properties last-prompt-end (point))))
+                 (buffer-substring-no-properties line-start (point)))
+            (buffer-substring-no-properties line-start (point))))
          (start
           (save-excursion
             (if (not (re-search-backward
                       (python-rx
                        (or whitespace open-paren close-paren string-delimiter))
-                      last-prompt-end
+                      line-start
                       t 1))
-                last-prompt-end
+                line-start
               (forward-char (length (match-string-no-properties 0)))
               (point))))
          (end (point))
@@ -3847,8 +3860,10 @@ The skeleton will be bound to python-skeleton-NAME."
   :type 'string
   :group 'python)
 
-(defvar-local python-check-custom-command nil
+(defvar python-check-custom-command nil
   "Internal use.")
+;; XXX: Avoid `defvar-local' for compat with Emacs<24.3
+(make-variable-buffer-local 'python-check-custom-command)
 
 (defun python-check (command)
   "Check a Python file (default current buffer's file).
@@ -3917,15 +3932,29 @@ See `python-check-command' for the default."
   :type 'string
   :group 'python)
 
+(defun python-eldoc--get-symbol-at-point ()
+  "Get the current symbol for eldoc.
+Returns the current symbol handling point within arguments."
+  (save-excursion
+    (let ((start (python-syntax-context 'paren)))
+      (when start
+        (goto-char start))
+      (when (or start
+                (eobp)
+                (memq (char-syntax (char-after)) '(?\ ?-)))
+        ;; Try to adjust to closest symbol if not in one.
+        (python-util-forward-comment -1)))
+    (python-info-current-symbol t)))
+
 (defun python-eldoc--get-doc-at-point (&optional force-input force-process)
   "Internal implementation to get documentation at point.
-If not FORCE-INPUT is passed then what `python-info-current-symbol'
+If not FORCE-INPUT is passed then what `python-eldoc--get-symbol-at-point'
 returns will be used.  If not FORCE-PROCESS is passed what
 `python-shell-get-process' returns is used."
   (let ((process (or force-process (python-shell-get-process))))
     (when process
       (let ((input (or force-input
-                       (python-info-current-symbol t))))
+                       (python-eldoc--get-symbol-at-point))))
         (and input
              ;; Prevent resizing the echo area when iPython is
              ;; enabled.  Bug#18794.
@@ -3945,7 +3974,7 @@ inferior Python process is updated properly."
   "Get help on SYMBOL using `help'.
 Interactively, prompt for symbol."
   (interactive
-   (let ((symbol (python-info-current-symbol t))
+   (let ((symbol (python-eldoc--get-symbol-at-point))
          (enable-recursive-minibuffers t))
      (list (read-string (if symbol
                             (format "Describe symbol (default %s): " symbol)
@@ -3954,6 +3983,17 @@ Interactively, prompt for symbol."
   (message (python-eldoc--get-doc-at-point symbol)))
 
 
+;;; Hideshow
+
+(defun python-hideshow-forward-sexp-function (arg)
+  "Python specific `forward-sexp' function for `hs-minor-mode'.
+Argument ARG is ignored."
+  arg  ; Shut up, byte compiler.
+  (python-nav-end-of-defun)
+  (unless (python-info-current-line-empty-p)
+    (backward-char)))
+
+
 ;;; Imenu
 
 (defvar python-imenu-format-item-label-function
@@ -4573,23 +4613,6 @@ returned as is."
               n (1- n)))
       (reverse acc))))
 
-(defun python-util-text-properties-replace-name
-  (from to &optional start end)
-  "Replace properties named FROM to TO, keeping its value.
-Arguments START and END narrow the buffer region to work on."
-  (save-excursion
-    (goto-char (or start (point-min)))
-    (while (not (eobp))
-      (let ((plist (text-properties-at (point)))
-            (next-change (or (next-property-change (point) (current-buffer))
-                             (or end (point-max)))))
-        (when (plist-get plist from)
-          (let* ((face (plist-get plist from))
-                 (plist (plist-put plist from nil))
-                 (plist (plist-put plist to face)))
-            (set-text-properties (point) next-change plist (current-buffer))))
-        (goto-char next-change)))))
-
 (defun python-util-strip-string (string)
   "Strip STRING whitespace and newlines from end and beginning."
   (replace-regexp-in-string
@@ -4682,14 +4705,23 @@ Arguments START and END narrow the buffer region to work on."
                                                  (current-column))))
          (^ '(- (1+ (current-indentation))))))
 
-  (add-function :before-until (local 'eldoc-documentation-function)
-                #'python-eldoc-function)
-
-  (add-to-list 'hs-special-modes-alist
-               `(python-mode "^\\s-*\\(?:def\\|class\\)\\>" nil "#"
-                             ,(lambda (_arg)
-                                (python-nav-end-of-defun))
-                             nil))
+  (if (null eldoc-documentation-function)
+      ;; Emacs<25
+      (set (make-local-variable 'eldoc-documentation-function)
+           #'python-eldoc-function)
+    (add-function :before-until (local 'eldoc-documentation-function)
+                  #'python-eldoc-function))
+
+  (add-to-list
+   'hs-special-modes-alist
+   `(python-mode
+     "\\s-*\\(?:def\\|class\\)\\>"
+     ;; Use the empty string as end regexp so it doesn't default to
+     ;; "\\s)".  This way parens at end of defun are properly hidden.
+     ""
+     "#"
+     python-hideshow-forward-sexp-function
+     nil))
 
   (set (make-local-variable 'outline-regexp)
        (python-rx (* space) block-start))