(require 'mm-view)
(require 'mm-decode)
-(require 'json)
(require 'cl)
(defvar notmuch-command "notmuch"
:group 'notmuch)
(defcustom notmuch-search-oldest-first t
- "Show the oldest mail first when searching."
+ "Show the oldest mail first when searching.
+
+This variable defines the default sort order for displaying
+search results. Note that any filtered searches created by
+`notmuch-search-filter' retain the search order of the parent
+search."
:type 'boolean
:group 'notmuch-search)
+(defcustom notmuch-poll-script nil
+ "An external script to incorporate new mail into the notmuch database.
+
+This variable controls the action invoked by
+`notmuch-poll-and-refresh-this-buffer' (bound by default to 'G')
+to incorporate new mail into the notmuch database.
+
+If set to nil (the default), new mail is processed by invoking
+\"notmuch new\". Otherwise, this should be set to a string that
+gives the name of an external script that processes new mail. If
+set to the empty string, no command will be run.
+
+The external script could do any of the following depending on
+the user's needs:
+
+1. Invoke a program to transfer mail to the local mail store
+2. Invoke \"notmuch new\" to incorporate the new mail
+3. Invoke one or more \"notmuch tag\" commands to classify the mail
+
+Note that the recommended way of achieving the same is using
+\"notmuch new\" hooks."
+ :type '(choice (const :tag "notmuch new" nil)
+ (const :tag "Disabled" "")
+ (string :tag "Custom script"))
+ :group 'notmuch-external)
+
;;
(defvar notmuch-search-history nil
:group 'notmuch-search
:group 'notmuch-show)
+(defvar notmuch-common-keymap
+ (let ((map (make-sparse-keymap)))
+ (define-key map "?" 'notmuch-help)
+ (define-key map "q" 'notmuch-kill-this-buffer)
+ (define-key map "s" 'notmuch-search)
+ (define-key map "z" 'notmuch-tree)
+ (define-key map "m" 'notmuch-mua-new-mail)
+ (define-key map "=" 'notmuch-refresh-this-buffer)
+ (define-key map "G" 'notmuch-poll-and-refresh-this-buffer)
+ map)
+ "Keymap shared by all notmuch modes.")
+
;; By default clicking on a button does not select the window
;; containing the button (as opposed to clicking on a widget which
;; does). This means that the button action is then executed in the
"Return the user.other_email value (as a list) from the notmuch configuration."
(split-string (notmuch-config-get "user.other_email") "\n"))
+(defun notmuch-poll ()
+ "Run \"notmuch new\" or an external script to import mail.
+
+Invokes `notmuch-poll-script', \"notmuch new\", or does nothing
+depending on the value of `notmuch-poll-script'."
+ (interactive)
+ (if (stringp notmuch-poll-script)
+ (unless (string= notmuch-poll-script "")
+ (call-process notmuch-poll-script nil nil))
+ (call-process notmuch-command nil nil nil "new")))
+
(defun notmuch-kill-this-buffer ()
"Kill the current buffer."
(interactive)
(kill-buffer (current-buffer)))
+(defun notmuch-documentation-first-line (symbol)
+ "Return the first line of the documentation string for SYMBOL."
+ (let ((doc (documentation symbol)))
+ (if doc
+ (with-temp-buffer
+ (insert (documentation symbol t))
+ (goto-char (point-min))
+ (let ((beg (point)))
+ (end-of-line)
+ (buffer-substring beg (point))))
+ "")))
+
+(defun notmuch-prefix-key-description (key)
+ "Given a prefix key code, return a human-readable string representation.
+
+This is basically just `format-kbd-macro' but we also convert ESC to M-."
+ (let* ((key-vector (if (vectorp key) key (vector key)))
+ (desc (format-kbd-macro key-vector)))
+ (if (string= desc "ESC")
+ "M-"
+ (concat desc " "))))
+
+
+(defun notmuch-describe-key (actual-key binding prefix ua-keys tail)
+ "Prepend cons cells describing prefix-arg ACTUAL-KEY and ACTUAL-KEY to TAIL
+
+It does not prepend if ACTUAL-KEY is already listed in TAIL."
+ (let ((key-string (concat prefix (format-kbd-macro actual-key))))
+ ;; We don't include documentation if the key-binding is
+ ;; over-ridden. Note, over-riding a binding automatically hides the
+ ;; prefixed version too.
+ (unless (assoc key-string tail)
+ (when (and ua-keys (symbolp binding)
+ (get binding 'notmuch-prefix-doc))
+ ;; Documentation for prefixed command
+ (let ((ua-desc (key-description ua-keys)))
+ (push (cons (concat ua-desc " " prefix (format-kbd-macro actual-key))
+ (get binding 'notmuch-prefix-doc))
+ tail)))
+ ;; Documentation for command
+ (push (cons key-string
+ (or (and (symbolp binding) (get binding 'notmuch-doc))
+ (notmuch-documentation-first-line binding)))
+ tail)))
+ tail)
+
+(defun notmuch-describe-remaps (remap-keymap ua-keys base-keymap prefix tail)
+ ;; Remappings are represented as a binding whose first "event" is
+ ;; 'remap. Hence, if the keymap has any remappings, it will have a
+ ;; binding whose "key" is 'remap, and whose "binding" is itself a
+ ;; keymap that maps not from keys to commands, but from old (remapped)
+ ;; functions to the commands to use in their stead.
+ (map-keymap
+ (lambda (command binding)
+ (mapc
+ (lambda (actual-key)
+ (setq tail (notmuch-describe-key actual-key binding prefix ua-keys tail)))
+ (where-is-internal command base-keymap)))
+ remap-keymap)
+ tail)
+
+(defun notmuch-describe-keymap (keymap ua-keys base-keymap &optional prefix tail)
+ "Return a list of cons cells, each describing one binding in KEYMAP.
+
+Each cons cell consists of a string giving a human-readable
+description of the key, and a one-line description of the bound
+function. See `notmuch-help' for an overview of how this
+documentation is extracted.
+
+UA-KEYS should be a key sequence bound to `universal-argument'.
+It will be used to describe bindings of commands that support a
+prefix argument. PREFIX and TAIL are used internally."
+ (map-keymap
+ (lambda (key binding)
+ (cond ((mouse-event-p key) nil)
+ ((keymapp binding)
+ (setq tail
+ (if (eq key 'remap)
+ (notmuch-describe-remaps
+ binding ua-keys base-keymap prefix tail)
+ (notmuch-describe-keymap
+ binding ua-keys base-keymap (notmuch-prefix-key-description key) tail))))
+ (binding
+ (setq tail (notmuch-describe-key (vector key) binding prefix ua-keys tail)))))
+ keymap)
+ tail)
+
+(defun notmuch-substitute-command-keys (doc)
+ "Like `substitute-command-keys' but with documentation, not function names."
+ (let ((beg 0))
+ (while (string-match "\\\\{\\([^}[:space:]]*\\)}" doc beg)
+ (let ((desc
+ (save-match-data
+ (let* ((keymap-name (substring doc (match-beginning 1) (match-end 1)))
+ (keymap (symbol-value (intern keymap-name)))
+ (ua-keys (where-is-internal 'universal-argument keymap t))
+ (desc-alist (notmuch-describe-keymap keymap ua-keys keymap))
+ (desc-list (mapcar (lambda (arg) (concat (car arg) "\t" (cdr arg))) desc-alist)))
+ (mapconcat #'identity desc-list "\n")))))
+ (setq doc (replace-match desc 1 1 doc)))
+ (setq beg (match-end 0)))
+ doc))
+
+(defun notmuch-help ()
+ "Display help for the current notmuch mode.
+
+This is similar to `describe-function' for the current major
+mode, but bindings tables are shown with documentation strings
+rather than command names. By default, this uses the first line
+of each command's documentation string. A command can override
+this by setting the 'notmuch-doc property of its command symbol.
+A command that supports a prefix argument can explicitly document
+its prefixed behavior by setting the 'notmuch-prefix-doc property
+of its command symbol."
+ (interactive)
+ (let* ((mode major-mode)
+ (doc (substitute-command-keys (notmuch-substitute-command-keys (documentation mode t)))))
+ (with-current-buffer (generate-new-buffer "*notmuch-help*")
+ (insert doc)
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (view-buffer (current-buffer) 'kill-buffer-if-not-modified))))
+
+(defun notmuch-subkeymap-help ()
+ "Show help for a subkeymap."
+ (interactive)
+ (let* ((key (this-command-keys-vector))
+ (prefix (make-vector (1- (length key)) nil))
+ (i 0))
+ (while (< i (length prefix))
+ (aset prefix i (aref key i))
+ (setq i (1+ i)))
+
+ (let* ((subkeymap (key-binding prefix))
+ (ua-keys (where-is-internal 'universal-argument nil t))
+ (prefix-string (notmuch-prefix-key-description prefix))
+ (desc-alist (notmuch-describe-keymap subkeymap ua-keys subkeymap prefix-string))
+ (desc-list (mapcar (lambda (arg) (concat (car arg) "\t" (cdr arg))) desc-alist))
+ (desc (mapconcat #'identity desc-list "\n")))
+ (with-help-window (help-buffer)
+ (with-current-buffer standard-output
+ (insert "\nPress 'q' to quit this window.\n\n")
+ (insert desc)))
+ (pop-to-buffer (help-buffer)))))
+
+(defvar notmuch-buffer-refresh-function nil
+ "Function to call to refresh the current buffer.")
+(make-variable-buffer-local 'notmuch-buffer-refresh-function)
+
+(defun notmuch-refresh-this-buffer ()
+ "Refresh the current buffer."
+ (interactive)
+ (when notmuch-buffer-refresh-function
+ (if (commandp notmuch-buffer-refresh-function)
+ ;; Pass prefix argument, etc.
+ (call-interactively notmuch-buffer-refresh-function)
+ (funcall notmuch-buffer-refresh-function))))
+
+(defun notmuch-poll-and-refresh-this-buffer ()
+ "Invoke `notmuch-poll' to import mail, then refresh the current buffer."
+ (interactive)
+ (notmuch-poll)
+ (notmuch-refresh-this-buffer))
+
(defun notmuch-prettify-subject (subject)
;; This function is used by `notmuch-search-process-filter' which
;; requires that we not disrupt its' matching state.
"[No Subject]"
subject)))
+(defun notmuch-sanitize (str)
+ "Sanitize control character in STR.
+
+This includes newlines, tabs, and other funny characters."
+ (replace-regexp-in-string "[[:cntrl:]\x7f\u2028\u2029]+" " " str))
+
(defun notmuch-escape-boolean-term (term)
"Escape a boolean term for use in a query.
"Return a query that matches the message with id ID."
(concat "id:" (notmuch-escape-boolean-term id)))
+(defun notmuch-hex-encode (str)
+ "Hex-encode STR (e.g., as used by batch tagging).
+
+This replaces spaces, percents, and double quotes in STR with
+%NN where NN is the hexadecimal value of the character."
+ (replace-regexp-in-string
+ "[ %\"]" (lambda (match) (format "%%%02x" (aref match 0))) str))
+
;;
(defun notmuch-common-do-stash (text)
parts))
;; Helper for parts which are generally not included in the default
-;; JSON output.
+;; SEXP output.
(defun notmuch-get-bodypart-internal (query part-number process-crypto)
(let ((args '("show" "--format=raw"))
(part-arg (format "--part=%s" part-number)))
below
string))
+(defun notmuch-map-text-property (start end prop func &optional object)
+ "Transform text property PROP using FUNC.
+
+Applies FUNC to each distinct value of the text property PROP
+between START and END of OBJECT, setting PROP to the value
+returned by FUNC."
+ (while (< start end)
+ (let ((value (get-text-property start prop object))
+ (next (next-single-property-change start prop object end)))
+ (put-text-property start next prop (funcall func value) object)
+ (setq start next))))
+
(defun notmuch-logged-error (msg &optional extra)
"Log MSG and EXTRA to *Notmuch errors* and signal MSG.
(error "%s" (concat msg (when extra
" (see *Notmuch errors* for more details)"))))
-(defun notmuch-check-async-exit-status (proc msg)
+(defun notmuch-check-async-exit-status (proc msg &optional command err-file)
"If PROC exited abnormally, pop up an error buffer and signal an error.
This is a wrapper around `notmuch-check-exit-status' for
asynchronous process sentinels. PROC and MSG must be the
-arguments passed to the sentinel."
+arguments passed to the sentinel. COMMAND and ERR-FILE, if
+provided, are passed to `notmuch-check-exit-status'. If COMMAND
+is not provided, it is taken from `process-command'."
(let ((exit-status
(case (process-status proc)
((exit) (process-exit-status proc))
((signal) msg))))
(when exit-status
- (notmuch-check-exit-status exit-status (process-command proc)))))
+ (notmuch-check-exit-status exit-status (or command (process-command proc))
+ nil err-file))))
(defun notmuch-check-exit-status (exit-status command &optional output err-file)
"If EXIT-STATUS is non-zero, pop up an error buffer and signal an error.
;; `notmuch-logged-error' does not return.
))))
-(defun notmuch-call-notmuch-json (&rest args)
- "Invoke `notmuch-command' with `args' and return the parsed JSON output.
+(defun notmuch-call-notmuch--helper (destination args)
+ "Helper for synchronous notmuch invocation commands.
+
+This wraps `call-process'. DESTINATION has the same meaning as
+for `call-process'. ARGS is as described for
+`notmuch-call-notmuch-process'."
+
+ (let (stdin-string)
+ (while (keywordp (car args))
+ (case (car args)
+ (:stdin-string (setq stdin-string (cadr args)
+ args (cddr args)))
+ (otherwise
+ (error "Unknown keyword argument: %s" (car args)))))
+ (if (null stdin-string)
+ (apply #'call-process notmuch-command nil destination nil args)
+ (insert stdin-string)
+ (apply #'call-process-region (point-min) (point-max)
+ notmuch-command t destination nil args))))
+
+(defun notmuch-call-notmuch-process (&rest args)
+ "Synchronously invoke `notmuch-command' with ARGS.
-The returned output will represent objects using property lists
-and arrays as lists. If notmuch exits with a non-zero status,
-this will pop up a buffer containing notmuch's output and signal
-an error."
+The caller may provide keyword arguments before ARGS. Currently
+supported keyword arguments are:
+
+ :stdin-string STRING - Write STRING to stdin
+
+If notmuch exits with a non-zero status, output from the process
+will appear in a buffer named \"*Notmuch errors*\" and an error
+will be signaled."
+ (with-temp-buffer
+ (let ((status (notmuch-call-notmuch--helper t args)))
+ (notmuch-check-exit-status status (cons notmuch-command args)
+ (buffer-string)))))
+
+(defun notmuch-call-notmuch-sexp (&rest args)
+ "Invoke `notmuch-command' with ARGS and return the parsed S-exp output.
+
+This is equivalent to `notmuch-call-notmuch-process', but parses
+notmuch's output as an S-expression and returns the parsed value.
+Like `notmuch-call-notmuch-process', if notmuch exits with a
+non-zero status, this will report its output and signal an
+error."
(with-temp-buffer
(let ((err-file (make-temp-file "nmerr")))
(unwind-protect
- (let ((status (apply #'call-process
- notmuch-command nil (list t err-file) nil args)))
+ (let ((status (notmuch-call-notmuch--helper (list t err-file) args)))
(notmuch-check-exit-status status (cons notmuch-command args)
(buffer-string) err-file)
(goto-char (point-min))
- (let ((json-object-type 'plist)
- (json-array-type 'list)
- (json-false 'nil))
- (json-read)))
+ (read (current-buffer)))
(delete-file err-file)))))
+(defun notmuch-start-notmuch (name buffer sentinel &rest args)
+ "Start and return an asynchronous notmuch command.
+
+This starts and returns an asynchronous process running
+`notmuch-command' with ARGS. The exit status is checked via
+`notmuch-check-async-exit-status'. Output written to stderr is
+redirected and displayed when the process exits (even if the
+process exits successfully). NAME and BUFFER are the same as in
+`start-process'. SENTINEL is a process sentinel function to call
+when the process exits, or nil for none. The caller must *not*
+invoke `set-process-sentinel' directly on the returned process,
+as that will interfere with the handling of stderr and the exit
+status."
+
+ ;; There is no way (as of Emacs 24.3) to capture stdout and stderr
+ ;; separately for asynchronous processes, or even to redirect stderr
+ ;; to a file, so we use a trivial shell wrapper to send stderr to a
+ ;; temporary file and clean things up in the sentinel.
+ (let* ((err-file (make-temp-file "nmerr"))
+ ;; Use a pipe
+ (process-connection-type nil)
+ ;; Find notmuch using Emacs' `exec-path'
+ (command (or (executable-find notmuch-command)
+ (error "command not found: %s" notmuch-command)))
+ (proc (apply #'start-process name buffer
+ "/bin/sh" "-c"
+ "exec 2>\"$1\"; shift; exec \"$0\" \"$@\""
+ command err-file args)))
+ (process-put proc 'err-file err-file)
+ (process-put proc 'sub-sentinel sentinel)
+ (process-put proc 'real-command (cons notmuch-command args))
+ (set-process-sentinel proc #'notmuch-start-notmuch-sentinel)
+ proc))
+
+(defun notmuch-start-notmuch-sentinel (proc event)
+ (let ((err-file (process-get proc 'err-file))
+ (sub-sentinel (process-get proc 'sub-sentinel))
+ (real-command (process-get proc 'real-command)))
+ (condition-case err
+ (progn
+ ;; Invoke the sub-sentinel, if any
+ (when sub-sentinel
+ (funcall sub-sentinel proc event))
+ ;; Check the exit status. This will signal an error if the
+ ;; exit status is non-zero. Don't do this if the process
+ ;; buffer is dead since that means Emacs killed the process
+ ;; and there's no point in telling the user that (but we
+ ;; still check for and report stderr output below).
+ (when (buffer-live-p (process-buffer proc))
+ (notmuch-check-async-exit-status proc event real-command err-file))
+ ;; If that didn't signal an error, then any error output was
+ ;; really warning output. Show warnings, if any.
+ (let ((warnings
+ (with-temp-buffer
+ (unless (= (second (insert-file-contents err-file)) 0)
+ (end-of-line)
+ ;; Show first line; stuff remaining lines in the
+ ;; errors buffer.
+ (let ((l1 (buffer-substring (point-min) (point))))
+ (skip-chars-forward "\n")
+ (cons l1 (unless (eobp)
+ (buffer-substring (point) (point-max)))))))))
+ (when warnings
+ (notmuch-logged-error (car warnings) (cdr warnings)))))
+ (error
+ ;; Emacs behaves strangely if an error escapes from a sentinel,
+ ;; so turn errors into messages.
+ (message "%s" (error-message-string err))))
+ (ignore-errors (delete-file err-file))))
+
;; This variable is used only buffer local, but it needs to be
;; declared globally first to avoid compiler warnings.
(defvar notmuch-show-process-crypto nil)
(make-variable-buffer-local 'notmuch-show-process-crypto)
-;; Incremental JSON parsing
-
-;; These two variables are internal variables to the parsing
-;; routines. They are always used buffer local but need to be declared
-;; globally to avoid compiler warnings.
-
-(defvar notmuch-json-parser nil
- "Internal incremental JSON parser object: local to the buffer being parsed.")
-
-(defvar notmuch-json-state nil
- "State of the internal JSON parser: local to the buffer being parsed.")
-
-(defun notmuch-json-create-parser (buffer)
- "Return a streaming JSON parser that consumes input from BUFFER.
-
-This parser is designed to read streaming JSON whose structure is
-known to the caller. Like a typical JSON parsing interface, it
-provides a function to read a complete JSON value from the input.
-However, it extends this with an additional function that
-requires the next value in the input to be a compound value and
-descends into it, allowing its elements to be read one at a time
-or further descended into. Both functions can return 'retry to
-indicate that not enough input is available.
-
-The parser always consumes input from BUFFER's point. Hence, the
-caller is allowed to delete and data before point and may
-resynchronize after an error by moving point."
-
- (list buffer
- ;; Terminator stack: a stack of characters that indicate the
- ;; end of the compound values enclosing point
- '()
- ;; Next: One of
- ;; * 'expect-value if the next token must be a value, but a
- ;; value has not yet been reached
- ;; * 'value if point is at the beginning of a value
- ;; * 'expect-comma if the next token must be a comma
- 'expect-value
- ;; Allow terminator: non-nil if the next token may be a
- ;; terminator
- nil
- ;; Partial parse position: If state is 'value, a marker for
- ;; the position of the partial parser or nil if no partial
- ;; parsing has happened yet
- nil
- ;; Partial parse state: If state is 'value, the current
- ;; `parse-partial-sexp' state
- nil))
-
-(defmacro notmuch-json-buffer (jp) `(first ,jp))
-(defmacro notmuch-json-term-stack (jp) `(second ,jp))
-(defmacro notmuch-json-next (jp) `(third ,jp))
-(defmacro notmuch-json-allow-term (jp) `(fourth ,jp))
-(defmacro notmuch-json-partial-pos (jp) `(fifth ,jp))
-(defmacro notmuch-json-partial-state (jp) `(sixth ,jp))
-
-(defvar notmuch-json-syntax-table
- (let ((table (make-syntax-table)))
- ;; The standard syntax table is what we need except that "." needs
- ;; to have word syntax instead of punctuation syntax.
- (modify-syntax-entry ?. "w" table)
- table)
- "Syntax table used for incremental JSON parsing.")
-
-(defun notmuch-json-scan-to-value (jp)
- ;; Helper function that consumes separators, terminators, and
- ;; whitespace from point. Returns nil if it successfully reached
- ;; the beginning of a value, 'end if it consumed a terminator, or
- ;; 'retry if not enough input was available to reach a value. Upon
- ;; nil return, (notmuch-json-next jp) is always 'value.
-
- (if (eq (notmuch-json-next jp) 'value)
- ;; We're already at a value
- nil
- ;; Drive the state toward 'expect-value
- (skip-chars-forward " \t\r\n")
- (or (when (eobp) 'retry)
- ;; Test for the terminator for the current compound
- (when (and (notmuch-json-allow-term jp)
- (eq (char-after) (car (notmuch-json-term-stack jp))))
- ;; Consume it and expect a comma or terminator next
- (forward-char)
- (setf (notmuch-json-term-stack jp) (cdr (notmuch-json-term-stack jp))
- (notmuch-json-next jp) 'expect-comma
- (notmuch-json-allow-term jp) t)
- 'end)
- ;; Test for a separator
- (when (eq (notmuch-json-next jp) 'expect-comma)
- (when (/= (char-after) ?,)
- (signal 'json-readtable-error (list "expected ','")))
- ;; Consume it, switch to 'expect-value, and disallow a
- ;; terminator
- (forward-char)
- (skip-chars-forward " \t\r\n")
- (setf (notmuch-json-next jp) 'expect-value
- (notmuch-json-allow-term jp) nil)
- ;; We moved point, so test for eobp again and fall through
- ;; to the next test if there's more input
- (when (eobp) 'retry))
- ;; Next must be 'expect-value and we know this isn't
- ;; whitespace, EOB, or a terminator, so point must be on a
- ;; value
- (progn
- (assert (eq (notmuch-json-next jp) 'expect-value))
- (setf (notmuch-json-next jp) 'value)
- nil))))
-
-(defun notmuch-json-begin-compound (jp)
- "Parse the beginning of a compound value and traverse inside it.
-
-Returns 'retry if there is insufficient input to parse the
-beginning of the compound. If this is able to parse the
-beginning of a compound, it moves point past the token that opens
-the compound and returns t. Later calls to `notmuch-json-read'
-will return the compound's elements.
-
-Entering JSON objects is currently unimplemented."
-
- (with-current-buffer (notmuch-json-buffer jp)
- ;; Disallow terminators
- (setf (notmuch-json-allow-term jp) nil)
- ;; Save "next" so we can restore it if there's a syntax error
- (let ((saved-next (notmuch-json-next jp)))
- (or (notmuch-json-scan-to-value jp)
- (if (/= (char-after) ?\[)
- (progn
- (setf (notmuch-json-next jp) saved-next)
- (signal 'json-readtable-error (list "expected '['")))
- (forward-char)
- (push ?\] (notmuch-json-term-stack jp))
- ;; Expect a value or terminator next
- (setf (notmuch-json-next jp) 'expect-value
- (notmuch-json-allow-term jp) t)
- t)))))
-
-(defun notmuch-json-read (jp)
- "Parse the value at point in JP's buffer.
-
-Returns 'retry if there is insufficient input to parse a complete
-JSON value (though it may still move point over separators or
-whitespace). If the parser is currently inside a compound value
-and the next token ends the list or object, this moves point just
-past the terminator and returns 'end. Otherwise, this moves
-point to just past the end of the value and returns the value."
-
- (with-current-buffer (notmuch-json-buffer jp)
- (or
- ;; Get to a value state
- (notmuch-json-scan-to-value jp)
-
- ;; Can we parse a complete value?
- (let ((complete
- (if (looking-at "[-+0-9tfn]")
- ;; This is a number or a keyword, so the partial
- ;; parser isn't going to help us because a truncated
- ;; number or keyword looks like a complete symbol to
- ;; it. Look for something that clearly ends it.
- (save-excursion
- (skip-chars-forward "^]},: \t\r\n")
- (not (eobp)))
-
- ;; We're looking at a string, object, or array, which we
- ;; can partial parse. If we just reached the value, set
- ;; up the partial parser.
- (when (null (notmuch-json-partial-state jp))
- (setf (notmuch-json-partial-pos jp) (point-marker)))
-
- ;; Extend the partial parse until we either reach EOB or
- ;; get the whole value
- (save-excursion
- (let ((pstate
- (with-syntax-table notmuch-json-syntax-table
- (parse-partial-sexp
- (notmuch-json-partial-pos jp) (point-max) 0 nil
- (notmuch-json-partial-state jp)))))
- ;; A complete value is available if we've reached
- ;; depth 0 or less and encountered a complete
- ;; subexpression.
- (if (and (<= (first pstate) 0) (third pstate))
- t
- ;; Not complete. Update the partial parser state
- (setf (notmuch-json-partial-pos jp) (point-marker)
- (notmuch-json-partial-state jp) pstate)
- nil))))))
-
- (if (not complete)
- 'retry
- ;; We have a value. Reset the partial parse state and expect
- ;; a comma or terminator after the value.
- (setf (notmuch-json-next jp) 'expect-comma
- (notmuch-json-allow-term jp) t
- (notmuch-json-partial-pos jp) nil
- (notmuch-json-partial-state jp) nil)
- ;; Parse the value
- (let ((json-object-type 'plist)
- (json-array-type 'list)
- (json-false nil))
- (json-read)))))))
-
-(defun notmuch-json-eof (jp)
- "Signal a json-error if there is more data in JP's buffer.
-
-Moves point to the beginning of any trailing data or to the end
-of the buffer if there is only trailing whitespace."
-
- (with-current-buffer (notmuch-json-buffer jp)
- (skip-chars-forward " \t\r\n")
- (unless (eobp)
- (signal 'json-error (list "Trailing garbage following JSON data")))))
-
-(defun notmuch-json-parse-partial-list (result-function error-function results-buf)
- "Parse a partial JSON list from current buffer.
-
-This function consumes a JSON list from the current buffer,
-applying RESULT-FUNCTION in buffer RESULT-BUFFER to each complete
-value in the list. It operates incrementally and should be
-called whenever the buffer has been extended with additional
-data.
-
-If there is a syntax error, this will attempt to resynchronize
-with the input and will apply ERROR-FUNCTION in buffer
-RESULT-BUFFER to any input that was skipped.
-
-It sets up all the needed internal variables: the caller just
-needs to call it with point in the same place that the parser
-left it."
- (let (done)
- (unless (local-variable-p 'notmuch-json-parser)
- (set (make-local-variable 'notmuch-json-parser)
- (notmuch-json-create-parser (current-buffer)))
- (set (make-local-variable 'notmuch-json-state) 'begin))
- (while (not done)
- (condition-case nil
- (case notmuch-json-state
- ((begin)
- ;; Enter the results list
- (if (eq (notmuch-json-begin-compound
- notmuch-json-parser) 'retry)
- (setq done t)
- (setq notmuch-json-state 'result)))
- ((result)
- ;; Parse a result
- (let ((result (notmuch-json-read notmuch-json-parser)))
- (case result
- ((retry) (setq done t))
- ((end) (setq notmuch-json-state 'end))
- (otherwise (with-current-buffer results-buf
- (funcall result-function result))))))
- ((end)
- ;; Any trailing data is unexpected
- (notmuch-json-eof notmuch-json-parser)
- (setq done t)))
- (json-error
- ;; Do our best to resynchronize and ensure forward
- ;; progress
- (let ((bad (buffer-substring (line-beginning-position)
- (line-end-position))))
- (forward-line)
- (with-current-buffer results-buf
- (funcall error-function "%s" bad))))))
- ;; Clear out what we've parsed
- (delete-region (point-min) (point))))
-
-
-
-
(provide 'notmuch-lib)
;; Local Variables: