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popup.el
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popup.el
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;;; popup.el --- Visual Popup User Interface
;; Copyright (C) 2009, 2010, 2011, 2012, 2013 Tomohiro Matsuyama
;; Author: Tomohiro Matsuyama <[email protected]>
;; Keywords: lisp
;; Version: 0.5.0
;; Package-Requires: ((cl-lib "0.3"))
;; 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/>.
;;; Commentary:
;; popup.el is a visual popup user interface library for Emacs. This
;; provides a basic API and common UI widgets such as popup tooltips
;; and popup menus.
;; See README.markdown for more information.
;;; Code:
(require 'cl-lib)
(defconst popup-version "0.5.0")
;;; Utilities
(defun popup-calculate-max-width (max-width)
"Determines whether the width desired is
character or window proportion based, And returns the result."
(cl-typecase max-width
(integer max-width)
(float (* (ceiling (/ (round (* max-width (window-width))) 10.0)) 10))))
(defvar popup-use-optimized-column-computation t
"Use the optimized column computation routine.
If there is a problem, please set it nil.")
(defmacro popup-aif (test then &rest else)
"Anaphoric if."
(declare (indent 2))
`(let ((it ,test))
(if it ,then ,@else)))
(defmacro popup-awhen (test &rest body)
"Anaphoric when."
(declare (indent 1))
`(let ((it ,test))
(when it ,@body)))
(defun popup-x-to-string (x)
"Convert any object to string effeciently.
This is faster than `prin1-to-string' in many cases."
(cl-typecase x
(string x)
(symbol (symbol-name x))
(integer (number-to-string x))
(float (number-to-string x))
(t (format "%s" x))))
(defun popup-substring-by-width (string width)
"Return a cons cell of substring and remaining string by
splitting with WIDTH."
;; Expand tabs into 4 spaces
(setq string (replace-regexp-in-string "\t" " " string))
(cl-loop with len = (length string)
with w = 0
for l from 0
for c in (append string nil)
while (<= (cl-incf w (char-width c)) width)
finally return
(if (< l len)
(cons (substring string 0 l) (substring string l))
(list string))))
(defun popup-fill-string (string &optional width max-width justify squeeze)
"Split STRING into fixed width strings and return a cons cell
like \(WIDTH . ROWS). Here, the car WIDTH indicates the actual
maxim width of ROWS.
The argument WIDTH specifies the width of filling each
paragraph. WIDTH nil means don't perform any justification and
word wrap. Note that this function doesn't add any padding
characters at the end of each row.
MAX-WIDTH, if WIDTH is nil, specifies the maximum number of
columns.
The optional fourth argument JUSTIFY specifies which kind of
justification to do: `full', `left', `right', `center', or
`none' (equivalent to nil). A value of t means handle each
paragraph as specified by its text properties.
SQUEEZE nil means leave whitespaces other than line breaks
untouched."
(if (eq width 0)
(error "Can't fill string with 0 width"))
(if width
(setq max-width width))
(with-temp-buffer
(let ((tab-width 4)
(fill-column width)
(left-margin 0)
(kinsoku-limit 1)
indent-tabs-mode
row rows)
(insert string)
(untabify (point-min) (point-max))
(if width
(fill-region (point-min) (point-max) justify (not squeeze)))
(goto-char (point-min))
(setq width 0)
(while (prog2
(let ((line (buffer-substring
(point) (progn (end-of-line) (point)))))
(if max-width
(while (progn
(setq row (truncate-string-to-width line max-width)
width (max width (string-width row)))
(push row rows)
(if (not (= (length row) (length line)))
(setq line (substring line (length row))))))
(setq width (max width (string-width line)))
(push line rows)))
(< (point) (point-max))
(beginning-of-line 2)))
(cons width (nreverse rows)))))
(defmacro popup-save-buffer-state (&rest body)
(declare (indent 0))
`(save-excursion
(let ((buffer-undo-list t)
(inhibit-read-only t)
(modified (buffer-modified-p)))
(unwind-protect
(progn ,@body)
(set-buffer-modified-p modified)))))
(defun popup-window-full-width-p (&optional window)
"A portable version of `window-full-width-p'."
(if (fboundp 'window-full-width-p)
(window-full-width-p window)
(= (window-width window) (frame-width (window-frame (or window (selected-window)))))))
(defun popup-truncated-partial-width-window-p (&optional window)
"A portable version of `truncated-partial-width-window-p'."
(unless window
(setq window (selected-window)))
(unless (popup-window-full-width-p window)
(let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows
(window-buffer window))))
(if (integerp t-p-w-w)
(< (window-width window) t-p-w-w)
t-p-w-w))))
(defun popup-current-physical-column ()
"Return the current physical column."
(or (when (and popup-use-optimized-column-computation
(eq (window-hscroll) 0))
(let ((current-column (current-column)))
(if (or (popup-truncated-partial-width-window-p)
truncate-lines
(< current-column (window-width)))
current-column)))
(car (posn-col-row (posn-at-point)))))
(defun popup-vertical-motion (column direction)
"A portable version of `vertical-motion'."
(if (>= emacs-major-version 23)
(vertical-motion (cons column direction))
(vertical-motion direction)
(move-to-column (+ (current-column) column))))
(defun popup-last-line-of-buffer-p ()
"Return non-nil if the cursor is at the last line of the
buffer."
(save-excursion (end-of-line) (/= (forward-line) 0)))
(defun popup-lookup-key-by-event (function event)
(or (funcall function (vector event))
(if (symbolp event)
(popup-aif (get event 'event-symbol-element-mask)
(funcall function
(vector (logior (or (get (car it) 'ascii-character)
0)
(cadr it))))))))
;;; Core
(defgroup popup nil
"Visual Popup User Interface"
:group 'lisp
:prefix "popup-")
(defface popup-face
'((t (:background "lightgray" :foreground "black")))
"Face for popup."
:group 'popup)
(defface popup-summary-face
'((t (:inherit popup-face :foreground "dimgray")))
"Face for popup summary."
:group 'popup)
(defface popup-scroll-bar-foreground-face
'((t (:background "black")))
"Foreground face for scroll-bar."
:group 'popup)
(defface popup-scroll-bar-background-face
'((t (:background "gray")))
"Background face for scroll-bar."
:group 'popup)
(defvar popup-instances nil
"Popup instances.")
(defvar popup-scroll-bar-foreground-char
(propertize " " 'face 'popup-scroll-bar-foreground-face)
"Foreground character for scroll-bar.")
(defvar popup-scroll-bar-background-char
(propertize " " 'face 'popup-scroll-bar-background-face)
"Background character for scroll-bar.")
(cl-defstruct popup
point row column width height min-height direction overlays keymap
parent depth
face mouse-face selection-face summary-face
margin-left margin-right margin-left-cancel scroll-bar symbol
cursor offset scroll-top current-height list newlines
pattern original-list)
(defun popup-item-propertize (item &rest properties)
"Same as `propertize' except that this avoids overriding
existed value with `nil' property."
(cl-loop for (k v) on properties by 'cddr
if v append (list k v) into props
finally return
(apply 'propertize
(popup-x-to-string item)
props)))
(defun popup-item-property (item property)
"Same as `get-text-property' except that this returns nil if
ITEM is not string."
(if (stringp item)
(get-text-property 0 property item)))
(cl-defun popup-make-item (name
&key
value
face
mouse-face
selection-face
sublist
document
symbol
summary)
"Utility function to make popup item. See also
`popup-item-propertize'."
(popup-item-propertize name
'value value
'popup-face face
'popup-mouse-face mouse-face
'selection-face selection-face
'document document
'symbol symbol
'summary summary
'sublist sublist))
(defsubst popup-item-value (item) (popup-item-property item 'value))
(defsubst popup-item-value-or-self (item) (or (popup-item-value item) item))
(defsubst popup-item-face (item) (popup-item-property item 'popup-face))
(defsubst popup-item-mouse-face (item) (popup-item-property item 'popup-mouse-face))
(defsubst popup-item-selection-face (item) (popup-item-property item 'selection-face))
(defsubst popup-item-document (item) (popup-item-property item 'document))
(defsubst popup-item-summary (item) (popup-item-property item 'summary))
(defsubst popup-item-symbol (item) (popup-item-property item 'symbol))
(defsubst popup-item-sublist (item) (popup-item-property item 'sublist))
(defun popup-item-documentation (item)
(let ((doc (popup-item-document item)))
(if (functionp doc)
(setq doc (funcall doc (popup-item-value-or-self item))))
doc))
(defun popup-item-show-help-1 (item)
(let ((doc (popup-item-documentation item)))
(when doc
(with-current-buffer (get-buffer-create " *Popup Help*")
(erase-buffer)
(insert doc)
(goto-char (point-min))
(display-buffer (current-buffer)))
t)))
(defun popup-item-show-help-with-event-loop (item)
(save-window-excursion
(when (popup-item-show-help-1 item)
(cl-loop do (clear-this-command-keys)
for key = (read-key-sequence-vector nil)
do
(cl-case (key-binding key)
(scroll-other-window
(scroll-other-window))
(scroll-other-window-down
(scroll-other-window-down nil))
(otherwise
(setq unread-command-events (append key unread-command-events))
(cl-return)))))))
(defun popup-item-show-help (item &optional persist)
"Display the documentation of ITEM with `display-buffer'. If
PERSIST is nil, the documentation buffer will be closed
automatically, meaning interal event loop ensures the buffer to
be closed. Otherwise, the buffer will be just displayed as
usual."
(when item
(if (not persist)
(popup-item-show-help-with-event-loop item)
(popup-item-show-help-1 item))))
(defun popup-set-list (popup list)
(popup-set-filtered-list popup list)
(setf (popup-pattern popup) nil)
(setf (popup-original-list popup) list))
(defun popup-set-filtered-list (popup list)
(let ((offset
(if (> (popup-direction popup) 0)
0
(max (- (popup-height popup) (length list)) 0))))
(setf (popup-list popup) list
(popup-offset popup) offset)))
(defun popup-selected-item (popup)
(nth (popup-cursor popup) (popup-list popup)))
(defun popup-selected-line (popup)
(- (popup-cursor popup) (popup-scroll-top popup)))
(defun popup-line-overlay (popup line)
(aref (popup-overlays popup) line))
(defun popup-selected-line-overlay (popup)
(popup-line-overlay popup (popup-selected-line popup)))
(defun popup-hide-line (popup line)
(let ((overlay (popup-line-overlay popup line)))
(overlay-put overlay 'display nil)
(overlay-put overlay 'after-string nil)))
(defun popup-line-hidden-p (popup line)
(let ((overlay (popup-line-overlay popup line)))
(and (eq (overlay-get overlay 'display) nil)
(eq (overlay-get overlay 'after-string) nil))))
(cl-defun popup-set-line-item (popup
line
&key
item
face
mouse-face
margin-left
margin-right
scroll-bar-char
symbol
summary
summary-face
keymap)
(let* ((overlay (popup-line-overlay popup line))
(content (popup-create-line-string popup (popup-x-to-string item)
:margin-left margin-left
:margin-right margin-right
:symbol symbol
:summary summary
:summary-face summary-face))
(start 0)
(prefix (overlay-get overlay 'prefix))
(postfix (overlay-get overlay 'postfix))
end)
(put-text-property 0 (length content) 'popup-item item content)
(put-text-property 0 (length content) 'keymap keymap content)
;; Overlap face properties
(when (get-text-property start 'face content)
(setq start (next-single-property-change start 'face content)))
(while (and start (setq end (next-single-property-change start 'face content)))
(put-text-property start end 'face face content)
(setq start (next-single-property-change end 'face content)))
(when start
(put-text-property start (length content) 'face face content))
(when mouse-face
(put-text-property 0 (length content) 'mouse-face mouse-face content))
(unless (overlay-get overlay 'dangle)
(overlay-put overlay 'display (concat prefix (substring content 0 1)))
(setq prefix nil
content (concat (substring content 1))))
(overlay-put overlay
'after-string
(concat prefix
content
scroll-bar-char
postfix))))
(cl-defun popup-create-line-string (popup
string
&key
margin-left
margin-right
symbol
summary
summary-face)
(let* ((popup-width (popup-width popup))
(summary-width (string-width summary))
(content-width (max
(min popup-width (string-width string))
(- popup-width
(if (> summary-width 0)
(+ summary-width 2)
0))))
(string (car (popup-substring-by-width string content-width)))
(string-width (string-width string))
(spacing (max (- popup-width string-width summary-width)
(if (> popup-width string-width) 1 0)))
(truncated-summary
(car (popup-substring-by-width
summary (max (- popup-width string-width spacing) 0)))))
(when summary-face
(put-text-property 0 (length truncated-summary)
'face summary-face truncated-summary))
(concat margin-left
string
(make-string spacing ? )
truncated-summary
symbol
margin-right)))
(defun popup-live-p (popup)
"Return non-nil if POPUP is alive."
(and popup (popup-overlays popup) t))
(defun popup-child-point (popup &optional offset)
(overlay-end
(popup-line-overlay
popup
(or offset
(popup-selected-line popup)))))
(defun popup-calculate-direction (height row)
"Return a proper direction when displaying a popup on this
window. HEIGHT is the a height of the popup, and ROW is a line
number at the point."
(let* ((remaining-rows (- (max 1 (- (window-height)
(if mode-line-format 1 0)
(if header-line-format 1 0)))
(count-lines (window-start) (point))))
(enough-space-above (> row height))
(enough-space-below (<= height remaining-rows)))
(if (and enough-space-above
(not enough-space-below))
-1
1)))
(cl-defun popup-create (point
width
height
&key
min-height
max-width
around
(face 'popup-face)
mouse-face
(selection-face face)
(summary-face 'popup-summary-face)
scroll-bar
margin-left
margin-right
symbol
parent
parent-offset
keymap)
"Create a popup instance at POINT with WIDTH and HEIGHT.
MIN-HEIGHT is a minimal height of the popup. The default value is
0.
MAX-WIDTH is the maximum width of the popup. The default value is
nil (no limit). If a floating point, the value refers to the ratio of
the window. If an integer, limit is in characters.
If AROUND is non-nil, the popup will be displayed around the
point but not at the point.
FACE is a background face of the popup. The default value is POPUP-FACE.
SELECTION-FACE is a foreground (selection) face of the popup The
default value is POPUP-FACE.
If SCROLL-BAR is non-nil, the popup will have a scroll bar at the
right.
If MARGIN-LEFT is non-nil, the popup will have a margin at the
left.
If MARGIN-RIGHT is non-nil, the popup will have a margin at the
right.
SYMBOL is a single character which indicates a kind of the item.
PARENT is a parent popup instance. If PARENT is omitted, the
popup will be a root instance.
PARENT-OFFSET is a row offset from the parent popup.
KEYMAP is a keymap that will be put on the popup contents."
(or margin-left (setq margin-left 0))
(or margin-right (setq margin-right 0))
(unless point
(setq point
(if parent (popup-child-point parent parent-offset) (point))))
(when max-width
(setq width (min width (popup-calculate-max-width max-width))))
(save-excursion
(goto-char point)
(let* ((row (line-number-at-pos))
(column (popup-current-physical-column))
(overlays (make-vector height nil))
(popup-width (+ width
(if scroll-bar 1 0)
margin-left
margin-right
(if symbol 2 0)))
margin-left-cancel
(window (selected-window))
(window-start (window-start))
(window-hscroll (window-hscroll))
(window-width (window-width))
(right (+ column popup-width))
(overflow (and (> right window-width)
(>= right popup-width)))
(foldable (and (null parent)
(>= column popup-width)))
(direction (or
;; Currently the direction of cascade popup won't be changed
(and parent (popup-direction parent))
;; Calculate direction
(popup-calculate-direction height row)))
(depth (if parent (1+ (popup-depth parent)) 0))
(newlines (max 0 (+ (- height (count-lines point (point-max))) (if around 1 0))))
current-column)
;; Case: no newlines at the end of the buffer
(when (> newlines 0)
(popup-save-buffer-state
(goto-char (point-max))
(insert (make-string newlines ?\n))))
;; Case: the popup overflows
(if overflow
(if foldable
(progn
(cl-decf column (- popup-width margin-left margin-right))
(unless around (move-to-column column)))
(when (not truncate-lines)
;; Truncate.
(let ((d (1+ (- popup-width (- window-width column)))))
(cl-decf popup-width d)
(cl-decf width d)))
(cl-decf column margin-left))
(cl-decf column margin-left))
;; Case: no space at the left
(when (and (null parent)
(< column 0))
;; Cancel margin left
(setq column 0)
(cl-decf popup-width margin-left)
(setq margin-left-cancel t))
(dotimes (i height)
(let (overlay begin w (dangle t) (prefix "") (postfix ""))
(when around
(popup-vertical-motion column direction))
(setq around t
current-column (popup-current-physical-column))
(when (> current-column column)
(backward-char)
(setq current-column (popup-current-physical-column)))
(when (< current-column column)
;; Extend short buffer lines by popup prefix (line of spaces)
(setq prefix (make-string
(+ (if (= current-column 0)
(- window-hscroll (current-column))
0)
(- column current-column))
? )))
(setq begin (point))
(setq w (+ popup-width (length prefix)))
(while (and (not (eolp)) (> w 0))
(setq dangle nil)
(cl-decf w (char-width (char-after)))
(forward-char))
(if (< w 0)
(setq postfix (make-string (- w) ? )))
(setq overlay (make-overlay begin (point)))
(overlay-put overlay 'window window)
(overlay-put overlay 'dangle dangle)
(overlay-put overlay 'prefix prefix)
(overlay-put overlay 'postfix postfix)
(overlay-put overlay 'width width)
(aset overlays
(if (> direction 0) i (- height i 1))
overlay)))
(cl-loop for p from (- 10000 (* depth 1000))
for overlay in (nreverse (append overlays nil))
do (overlay-put overlay 'priority p))
(let ((it (make-popup :point point
:row row
:column column
:width width
:height height
:min-height min-height
:direction direction
:parent parent
:depth depth
:face face
:mouse-face mouse-face
:selection-face selection-face
:summary-face summary-face
:margin-left margin-left
:margin-right margin-right
:margin-left-cancel margin-left-cancel
:scroll-bar scroll-bar
:symbol symbol
:cursor 0
:offset 0
:scroll-top 0
:current-height 0
:list nil
:newlines newlines
:overlays overlays
:keymap keymap)))
(push it popup-instances)
it))))
(defun popup-delete (popup)
"Delete POPUP instance."
(when (popup-live-p popup)
(popup-hide popup)
(mapc 'delete-overlay (popup-overlays popup))
(setf (popup-overlays popup) nil)
(setq popup-instances (delq popup popup-instances))
;; Restore newlines state
(let ((newlines (popup-newlines popup)))
(when (> newlines 0)
(popup-save-buffer-state
(goto-char (point-max))
(dotimes (i newlines)
(if (= (char-before) ?\n)
(delete-char -1)))))))
nil)
(defun popup-draw (popup)
"Draw POPUP."
(cl-loop with height = (popup-height popup)
with min-height = (popup-min-height popup)
with popup-face = (popup-face popup)
with mouse-face = (popup-mouse-face popup)
with selection-face = (popup-selection-face popup)
with summary-face-0 = (popup-summary-face popup)
with list = (popup-list popup)
with length = (length list)
with thum-size = (max (/ (* height height) (max length 1)) 1)
with page-size = (/ (+ 0.0 (max length 1)) height)
with scroll-bar = (popup-scroll-bar popup)
with margin-left = (make-string (if (popup-margin-left-cancel popup) 0 (popup-margin-left popup)) ? )
with margin-right = (make-string (popup-margin-right popup) ? )
with symbol = (popup-symbol popup)
with cursor = (popup-cursor popup)
with scroll-top = (popup-scroll-top popup)
with offset = (popup-offset popup)
with keymap = (popup-keymap popup)
for o from offset
for i from scroll-top
while (< o height)
for item in (nthcdr scroll-top list)
for page-index = (* thum-size (/ o thum-size))
for face = (if (= i cursor)
(or (popup-item-selection-face item) selection-face)
(or (popup-item-face item) popup-face))
for summary-face = (unless (= i cursor) summary-face-0)
for empty-char = (propertize " " 'face face)
for scroll-bar-char = (if scroll-bar
(cond
((and (not (eq scroll-bar :always))
(<= page-size 1))
empty-char)
((and (> page-size 1)
(>= cursor (* page-index page-size))
(< cursor (* (+ page-index thum-size) page-size)))
popup-scroll-bar-foreground-char)
(t
popup-scroll-bar-background-char))
"")
for sym = (if symbol
(concat " " (or (popup-item-symbol item) " "))
"")
for summary = (or (popup-item-summary item) "")
do
;; Show line and set item to the line
(popup-set-line-item popup o
:item item
:face face
:mouse-face mouse-face
:margin-left margin-left
:margin-right margin-right
:scroll-bar-char scroll-bar-char
:symbol sym
:summary summary
:summary-face summary-face
:keymap keymap)
finally
;; Remember current height
(setf (popup-current-height popup) (- o offset))
;; Hide remaining lines
(let ((scroll-bar-char (if scroll-bar (propertize " " 'face popup-face) ""))
(symbol (if symbol " " "")))
(if (> (popup-direction popup) 0)
(progn
(when min-height
(while (< o min-height)
(popup-set-line-item popup o
:item ""
:face popup-face
:margin-left margin-left
:margin-right margin-right
:scroll-bar-char scroll-bar-char
:symbol symbol
:summary "")
(cl-incf o)))
(while (< o height)
(popup-hide-line popup o)
(cl-incf o)))
(cl-loop with h = (if min-height (- height min-height) offset)
for o from 0 below offset
if (< o h)
do (popup-hide-line popup o)
if (>= o h)
do (popup-set-line-item popup o
:item ""
:face popup-face
:margin-left margin-left
:margin-right margin-right
:scroll-bar-char scroll-bar-char
:symbol symbol
:summary ""))))))
(defun popup-hide (popup)
"Hide POPUP."
(dotimes (i (popup-height popup))
(popup-hide-line popup i)))
(defun popup-hidden-p (popup)
"Return non-nil if POPUP is hidden."
(let ((hidden t))
(when (popup-live-p popup)
(dotimes (i (popup-height popup))
(unless (popup-line-hidden-p popup i)
(setq hidden nil))))
hidden))
(defun popup-jump (popup cursor)
"Jump to a position specified by CURSOR of POPUP and draw."
(let ((scroll-top (popup-scroll-top popup)))
;; Do not change page as much as possible.
(unless (and (<= scroll-top cursor)
(< cursor (+ scroll-top (popup-height popup))))
(setf (popup-scroll-top popup) cursor))
(setf (popup-cursor popup) cursor)
(popup-draw popup)))
(defun popup-select (popup i)
"Select the item at I of POPUP and draw."
(setq i (+ i (popup-offset popup)))
(when (and (<= 0 i) (< i (popup-height popup)))
(setf (popup-cursor popup) i)
(popup-draw popup)
t))
(defun popup-next (popup)
"Select the next item of POPUP and draw."
(let ((height (popup-height popup))
(cursor (1+ (popup-cursor popup)))
(scroll-top (popup-scroll-top popup))
(length (length (popup-list popup))))
(cond
((>= cursor length)
;; Back to first page
(setq cursor 0
scroll-top 0))
((= cursor (+ scroll-top height))
;; Go to next page
(setq scroll-top (min (1+ scroll-top) (max (- length height) 0)))))
(setf (popup-cursor popup) cursor
(popup-scroll-top popup) scroll-top)
(popup-draw popup)))
(defun popup-previous (popup)
"Select the previous item of POPUP and draw."
(let ((height (popup-height popup))
(cursor (1- (popup-cursor popup)))
(scroll-top (popup-scroll-top popup))
(length (length (popup-list popup))))
(cond
((< cursor 0)
;; Go to last page
(setq cursor (1- length)
scroll-top (max (- length height) 0)))
((= cursor (1- scroll-top))
;; Go to previous page
(cl-decf scroll-top)))
(setf (popup-cursor popup) cursor
(popup-scroll-top popup) scroll-top)
(popup-draw popup)))
(defun popup-page-next (popup)
"Select next item of POPUP per `popup-height' range.
Pages down through POPUP."
(dotimes (counter (1- (popup-height popup)))
(popup-next popup)))
(defun popup-page-previous (popup)
"Select previous item of POPUP per `popup-height' range.
Pages up through POPUP."
(dotimes (counter (1- (popup-height popup)))
(popup-previous popup)))
(defun popup-scroll-down (popup &optional n)
"Scroll down N of POPUP and draw."
(let ((scroll-top (min (+ (popup-scroll-top popup) (or n 1))
(- (length (popup-list popup)) (popup-height popup)))))
(setf (popup-cursor popup) scroll-top
(popup-scroll-top popup) scroll-top)
(popup-draw popup)))
(defun popup-scroll-up (popup &optional n)
"Scroll up N of POPUP and draw."
(let ((scroll-top (max (- (popup-scroll-top popup) (or n 1))
0)))
(setf (popup-cursor popup) scroll-top
(popup-scroll-top popup) scroll-top)
(popup-draw popup)))
;;; Popup Incremental Search
(defface popup-isearch-match
'((t (:background "sky blue")))
"Popup isearch match face."
:group 'popup)
(defvar popup-isearch-cursor-color "blue")
(defvar popup-isearch-keymap
(let ((map (make-sparse-keymap)))
;(define-key map "\r" 'popup-isearch-done)
(define-key map "\C-g" 'popup-isearch-cancel)
(define-key map "\C-h" 'popup-isearch-delete)
(define-key map (kbd "DEL") 'popup-isearch-delete)
map))
(defvar popup-menu-show-quick-help-function 'popup-menu-show-quick-help
"Function used for showing quick help by `popup-menu*'.")
(defsubst popup-isearch-char-p (char)
(and (integerp char)
(<= 32 char)
(<= char 126)))
(defun popup-isearch-filter-list (pattern list)
(cl-loop with regexp = (regexp-quote pattern)
for item in list
do
(unless (stringp item)
(setq item (popup-item-propertize (popup-x-to-string item)
'value item)))
if (string-match regexp item)
collect
(let ((beg (match-beginning 0))
(end (match-end 0)))
(alter-text-property 0 (length item) 'face
(lambda (prop)
(unless (eq prop 'popup-isearch-match)
prop))
item)
(put-text-property beg end
'face 'popup-isearch-match
item)
item)))
(defun popup-isearch-prompt (popup pattern)
(format "Pattern: %s" (if (= (length (popup-list popup)) 0)
(propertize pattern 'face 'isearch-fail)
pattern)))
(defun popup-isearch-update (popup pattern &optional callback)
(setf (popup-cursor popup) 0
(popup-scroll-top popup) 0
(popup-pattern popup) pattern)
(let ((list (popup-isearch-filter-list pattern (popup-original-list popup))))
(popup-set-filtered-list popup list)
(if callback
(funcall callback list)))
(popup-draw popup))
(cl-defun popup-isearch (popup
&key
(cursor-color popup-isearch-cursor-color)
(keymap popup-isearch-keymap)
callback
help-delay)
"Start isearch on POPUP. This function is synchronized, meaning
event loop waits for quiting of isearch.
CURSOR-COLOR is a cursor color during isearch. The default value
is `popup-isearch-cursor-color'.
KEYMAP is a keymap which is used when processing events during
event loop. The default value is `popup-isearch-keymap'.
CALLBACK is a function taking one argument. `popup-isearch' calls
CALLBACK, if specified, after isearch finished or isearch
canceled. The arguments is whole filtered list of items.
HELP-DELAY is a delay of displaying helps."
(let ((list (popup-original-list popup))
(pattern (or (popup-pattern popup) ""))
(old-cursor-color (frame-parameter (selected-frame) 'cursor-color))
prompt key binding)
(unwind-protect
(cl-block nil
(if cursor-color
(set-cursor-color cursor-color))
(while t
(setq prompt (popup-isearch-prompt popup pattern))
(setq key (popup-menu-read-key-sequence keymap prompt help-delay))
(if (null key)
(unless (funcall popup-menu-show-quick-help-function popup nil :prompt prompt)
(clear-this-command-keys)
(push (read-event prompt) unread-command-events))
(setq binding (lookup-key keymap key))
(cond
((and (stringp key)
(popup-isearch-char-p (aref key 0)))
(setq pattern (concat pattern key)))
((eq binding 'popup-isearch-done)
(cl-return nil))
((eq binding 'popup-isearch-cancel)
(popup-isearch-update popup "" callback)
(cl-return t))
((eq binding 'popup-isearch-delete)
(if (> (length pattern) 0)
(setq pattern (substring pattern 0 (1- (length pattern))))))
(t
(setq unread-command-events
(append (listify-key-sequence key) unread-command-events))
(cl-return nil)))
(popup-isearch-update popup pattern callback))))
(if old-cursor-color
(set-cursor-color old-cursor-color)))))
;;; Popup Tip
(defface popup-tip-face
'((t (:background "khaki1" :foreground "black")))
"Face for popup tip."