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(custom-declare-group 'help-at-pt nil "Features for displaying local help." :group 'help :version "22.1")
#@319 Return the help-echo string at point.
Normally, the string produced by the `help-echo' text or overlay
property, or nil, is returned.
If KBD is non-nil, `kbd-help' is used instead, and any
`help-echo' property is ignored. In this case, the return value
can also be t, if that is the value of the `kbd-help' property.
(defalias 'help-at-pt-string #[(&optional kbd) "\212\203 \305\202\n \306\307` \"\211@\203 \n\202% o?\205% \310u\210\307` \"\211@\nA \311 !\203C \312 \f\203= \f\202> p`#\202F \313 !.\207" [kbd prop pair val ov kbd-help help-echo get-char-property-and-overlay -1 functionp selected-window eval] 5 (#$ . 515)])
#@214 Return the keyboard help string at point.
If the `kbd-help' text or overlay property at point produces a
string, return it. Otherwise, use the `help-echo' property.
If this produces no string either, return nil.
(defalias 'help-at-pt-kbd-string #[nil "\302\303!\302 \211\203 \303=\204 \202 *\207" [echo kbd help-at-pt-string t] 3 (#$ . 1157)])
#@408 Display local help in the echo area.
This displays a short help message, namely the string produced by
the `kbd-help' property at point. If `kbd-help' does not produce
a string, but the `help-echo' property does, then that string is
printed instead.
A numeric argument ARG prevents display of a message in case
there is no help. While ARG can be used interactively, it is
mainly meant for use from Lisp.
(defalias 'display-local-help #[(&optional arg) "\302 \211\203 \303\304\"\202 ?\205 \303\305!)\207" [help arg help-at-pt-kbd-string message "%s" "No local help at point"] 4 (#$ . 1517) "P"])
#@261 Non-nil means that a timer is set that checks for local help.
If non-nil, this is the value returned by the call of
`run-with-idle-timer' that set that timer. This variable is used
internally to enable `help-at-pt-display-when-idle'. Do not set it
yourself.
(defvar help-at-pt-timer nil (#$ . 2128))
#@545 Delay before displaying local help.
This is used if `help-at-pt-display-when-idle' is enabled.
The value may be an integer or floating point number.
If a timer is already active, there are two ways to make the new
value take effect immediately. After setting the value, you can
first call `help-at-pt-cancel-timer' and then set a new timer
with `help-at-pt-set-timer'. Alternatively, you can set this
variable through Custom. This will not set a timer if none is
active, but if one is already active, Custom will make it use the
new value.
(custom-declare-variable 'help-at-pt-timer-delay 1 '(#$ . 2437) :group 'help-at-pt :type 'number :initialize 'custom-initialize-default :set #[(variable value) "\303 \"\210\304\302!\205 \n\205 \305\n \306#\207" [variable value help-at-pt-timer set-default boundp timer-set-idle-time t] 4])
#@95 Cancel any timer set by `help-at-pt-set-timer'.
This disables `help-at-pt-display-when-idle'.
(defalias 'help-at-pt-cancel-timer #[nil "\302 \205
\303 !\210\304\211)\207" [inhibit-quit help-at-pt-timer t cancel-timer nil] 2 (#$ . 3280) nil])
#@102 Enable `help-at-pt-display-when-idle'.
This is done by setting a timer, if none is currently active.
(defalias 'help-at-pt-set-timer #[nil "?\205\f \302 \303\304#\211\207" [help-at-pt-timer help-at-pt-timer-delay run-with-idle-timer t help-at-pt-maybe-display] 4 (#$ . 3532) nil])
#@1329 Automatically show local help on point-over.
If the value is t, the string obtained from any `kbd-help' or
`help-echo' property at point is automatically printed in the
echo area, if nothing else is already displayed there, or after a
quit. If both `kbd-help' and `help-echo' produce help strings,
`kbd-help' is used. If the value is a list, the help only gets
printed if there is a text or overlay property at point that is
included in this list. Suggested properties are `keymap',
`local-map', `button' and `kbd-help'. Any value other than t or
a non-empty list disables the feature.
This variable only takes effect after a call to
`help-at-pt-set-timer'. The help gets printed after Emacs has
been idle for `help-at-pt-timer-delay' seconds. You can call
`help-at-pt-cancel-timer' to cancel the timer set by, and the
effect of, `help-at-pt-set-timer'.
When this variable is set through Custom, `help-at-pt-set-timer'
is called automatically, unless the value is `never', in which
case `help-at-pt-cancel-timer' is called. Specifying an empty
list of properties through Custom will set the timer, thus
enabling buffer local values. It sets the actual value to nil.
Thus, Custom distinguishes between a nil value and other values
that disable the feature, which Custom identifies with `never'.
The default is `never'.
(custom-declare-variable 'help-at-pt-display-when-idle ''never '(#$ . 3823) :group 'help-at-pt :type '(choice (const :tag "Always" :format "%t\n%h" :doc "This choice can get noisy.\nThe text printed from the `help-echo' property is often only\nrelevant when using the mouse. If you mind about too many\nmessages getting printed in the echo area, use \"In certain\nsituations\". See the documentation there for more information." t) (repeat :tag "In certain situations" :offset 0 :format "%{%t%}:\n%v%i\n%h" :doc "This choice lets you specify a list of text properties.\nPresence of any of these properties will trigger display of\navailable local help on point-over.\nIf you use this alternative through Custom without listing any\nproperties, a timer will be set anyway. This will enable buffer\nlocal values. Use \"Never\" if you do not want a timer to be set.\n\nSuggested properties:\nThe `keymap' and `local-map' properties change keybindings in\nparts of the buffer. Some of these keymaps are mode independent\nand are not mentioned in the mode documentation. Hence, the help\ntext is likely to be useful.\nSpecifying `button' is relevant in Custom and similar buffers.\nIn these buffers, most, but not all, of the text shown this way is\navailable by default when using tab, but not on regular point-over.\nThe presence of a `kbd-help' property guarantees that non mouse\nspecific help is available." :value (keymap local-map button kbd-help) symbol) (other :tag "Never" :format "%t\n%h" :doc "This choice normally disables buffer local values.\nIf you choose this value through Custom and a timer checking for\nlocal help is currently active, it will be canceled. No new\ntimer will be set. Call `help-at-pt-set-timer' after choosing\nthis option, or use \"In certain situations\" and specify no text\nproperties, to enable buffer local values." never)) :initialize 'custom-initialize-default :set #[(variable value) "\302 \"\210 \303=\203 \304 \207\305 \207" [variable value set-default never help-at-pt-cancel-timer help-at-pt-set-timer] 3] :set-after '(help-at-pt-timer-delay) :require 'help-at-pt)
(defalias 'help-at-pt-maybe-display #[nil "\303=\204[ :\205j \3042X \305\211\203- \n@\306` \"\203& \307\304\303\"\210\nA\211\204 *o?\205W \212\310u\210\305\211\205V \n@\306` \"\203N \307\304\303\"\210\nA\211\204? \305+0\205j \311 \203g \311 \312\230\205j \313\303!\207" [help-at-pt-display-when-idle prop --dolist-tail-- t found nil get-char-property throw -1 current-message "Quit" display-local-help] 4])
#@853 Go to the start of the next region with non-nil PROP property.
Then run HOOK, which should be a quoted symbol that is a normal
hook variable, or an expression evaluating to such a symbol.
Adjacent areas with different non-nil PROP properties are
considered different regions.
With numeric argument ARG, move to the start of the ARGth next
such region, then run HOOK. If ARG is negative, move backward.
If point is already in a region, then that region does not count
toward ARG. If ARG is 0 and point is inside a region, move to
the start of that region. If ARG is 0 and point is not in a
region, print a message to that effect, but do not move point and
do not run HOOK. If there are not enough regions to move over,
an error results and the number of available regions is mentioned
in the error message. Point is not moved and HOOK is not run.
(defalias 'scan-buf-move-to-region #[(prop &optional arg hook) "\306V\203g `dU\203 \307\310 \"\210`\306 \fW\203^ \311\n \"\312\n \"\204W \311\n \"\312\n \"\204W \306U\203C \307\310 \"\210\202W \313U\203Q \307\314 \"\210\202W \307\315 #\210 T\211\202 *\nb\210\316
!)\207\306U\203\232 \312` \"\211 \204~ \317\320 \"\202\230 \312`S \"=\203\225 \321` \"b\210\316
!\202\230 \316
!)\207\306W\205 `\312` \" \203\275 \312\nS \"=\203\275 \321\n \"\neU\203\310 \307\322 \"\210[\306 \fW\203\321\n \"\312\n \"\204
\321\n \"\312\n \"\204
\306U\203\371 \307\322 \"\210\202
\313U\203\307\323 \"\210\202
\307\324 #\210 T\211\202\316 *\nb\210\316
!*\207" [arg prop pos x --dotimes-limit-- hook 0 error "No further `%s' regions" next-single-char-property-change get-char-property 1 "There is only one further `%s' region" "There are only %d further `%s' regions" run-hooks message "Point is not in a `%s' region" previous-single-char-property-change "No prior `%s' regions" "There is only one prior `%s' region" "There are only %d prior `%s' regions" val] 5 (#$ . 7698)])
#@127 Normal hook run by `scan-buf-next-region'.
Also used by `scan-buf-previous-region'. The hook is run after
positioning point.
(defvar scan-buf-move-hook '(display-local-help) (#$ . 9654))
#@939 Go to the start of the next region with non-nil help-echo.
Print the help found there using `display-local-help'. Adjacent
areas with different non-nil help-echo properties are considered
different regions.
With numeric argument ARG, move to the start of the ARGth next
help-echo region. If ARG is negative, move backward. If point
is already in a help-echo region, then that region does not count
toward ARG. If ARG is 0 and point is inside a help-echo region,
move to the start of that region. If ARG is 0 and point is not
in such a region, just print a message to that effect. If there
are not enough regions to move over, an error results and the
number of available regions is mentioned in the error message.
A potentially confusing subtlety is that point can be in a
help-echo region without any local help being available. This is
because `help-echo' can be a function evaluating to nil. This
rarely happens in practice.
(defalias 'scan-buf-next-region #[(&optional arg) "\301\302\303#\207" [arg scan-buf-move-to-region help-echo scan-buf-move-hook] 4 (#$ . 9849) "p"])
#@297 Go to the start of the previous region with non-nil help-echo.
Print the help found there using `display-local-help'. Adjacent
areas with different non-nil help-echo properties are considered
different regions. With numeric argument ARG, behaves like
`scan-buf-next-region' with argument -ARG.
(defalias 'scan-buf-previous-region #[(&optional arg) "\301\302[\303#\207" [arg scan-buf-move-to-region help-echo scan-buf-move-hook] 4 (#$ . 10944) "p"])
(provide 'help-at-pt)