/
telega-util.el
3277 lines (3009 loc) · 140 KB
/
telega-util.el
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;;; telega-util.el --- Utility functions for telega -*- lexical-binding:t -*-
;; Copyright (C) 2018 by Zajcev Evgeny.
;; Author: Zajcev Evgeny <zevlg@yandex.ru>
;; Created: Sat Apr 21 03:56:02 2018
;; Keywords:
;; telega 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.
;; telega 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 telega. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Utility functions to be used by telega
;;; Code:
(require 'ewoc)
(require 'cl-lib)
(require 'puny) ; `puny-decode-domain'
(require 'files) ; `locate-file'
(require 'rx) ; `rx'
(require 'svg)
(require 'color) ; `color-XXX'
(require 'dired-aux) ; `dired-dwim-target-directory'
(require 'ansi-color) ; `ansi-color-apply'
(require 'url-util) ; `url-unhex-string'
(require 'org) ; `org-read-date', `org-do-emphasis-faces'
(require 'org-element) ; for `org-do-emphasis-faces'
(require 'rainbow-identifiers)
(require 'transient)
(require 'telega-core)
(require 'telega-customize)
(require 'telega-media)
(require 'telega-topic)
(require 'telega-folders)
(declare-function telega-root--buffer "telega-root")
(declare-function telega-chatbuf--name "telega-chat" (chat))
(declare-function telega-describe-chat "telega-chat" (chat))
(declare-function telega-folder-names "telega-folders")
(declare-function telega-browse-url "telega-webpage" (url &optional in-web-browser))
(declare-function telega-user-list "telega-user" (&optional temex))
(declare-function telega-user> "telega-user" (user1 user2))
(defun telega-file-exists-p (filename)
"Return non-nil if FILENAME exists.
Unlike `file-exists-p' this return nil for empty string FILENAME.
Also return `nil' if FILENAME is `nil'."
(and filename
(not (string-empty-p filename))
(file-exists-p filename)))
(defun telega-plist-del (plist prop)
"From PLIST remove property PROP."
;; NOTE: `cl--plist-remove' has been removed in Emacs master
;; See https://t.me/emacs_telega/27687
;; Code taken from `org-plist-delete'
(let (p)
(while plist
(if (not (eq prop (car plist)))
(setq p (plist-put p (car plist) (nth 1 plist))))
(setq plist (cddr plist)))
p))
(defun telega-plist-map (func plist)
"Map FUNCTION on PLIST and return resulting list.
FUNCTION must accept two arguments: KEY and VALUE."
(let (result)
(telega--tl-dolist ((prop-name value) plist)
(setq result (cons (funcall func prop-name value) result)))
(nreverse result)))
(defun telega-face-height (face)
"Return float version of FACE height."
(let ((height (face-attribute face :height)))
(if (floatp height)
height
(/ (float height) (face-attribute 'default :height)))))
(defun telega-short-filename (filename)
"Shortens FILENAME by removing `telega-directory' prefix."
(if (and telega-use-short-filenames
(string-prefix-p (concat telega-directory "/") filename))
(substring filename (1+ (length telega-directory)))
(abbreviate-file-name filename)))
(defun telega-x-frame ()
"Return window system frame, if any.
Selected frame and frame displaying root buffer are examined first."
(or (when (display-graphic-p (selected-frame))
(selected-frame))
(when-let ((root-frame
(window-frame
(get-buffer-window (telega-root--buffer)))))
(when (display-graphic-p root-frame)
root-frame))
(cl-find-if #'display-graphic-p (frame-list))))
(defun telega-focus-state (&optional frame)
"Return non-nil if FRAME has focus.
Can be used as value for `telega-online-status-function'."
(if (fboundp 'frame-focus-state)
(funcall 'frame-focus-state frame)
;; NOTE: For tty frame always return non-nil
;; see https://t.me/emacs_telega/7419
(or (not (display-graphic-p frame))
(frame-parameter frame 'x-has-focus))))
(defun telega-buffer-p (&optional buffer)
"Return non-nil if BUFFER is some telega buffer.
If BUFFER is ommited, current buffer is used.
Could be used as value for `telega-online-status-function'."
(with-current-buffer (or buffer (current-buffer))
(when (or (derived-mode-p 'telega-root-mode)
(derived-mode-p 'telega-chat-mode)
(string-prefix-p "*Telega" (buffer-name))
(string-prefix-p "*Telegram" (buffer-name)))
t)))
(defun telega-chars-xwidth (n)
"Return pixel width for N characters.
`telega--default-face' is used for size calculation."
;; NOTE: Same (* n (window-font-width (get-buffer-window nil (telega-x-frame))))
;; but without tweaking on window configuration, which breaks inserters
(* n (if-let ((tframe (telega-x-frame)))
(let* ((info (font-info
(face-font telega--default-face tframe) tframe))
(width (aref info 11)))
(if (> width 0)
width
(aref info 10)))
(frame-char-width))))
(defun telega-chars-xheight (n)
"Return pixel height for N characters.
`telega--default-face' is used for size calculation."
(* n (if-let ((tframe (telega-x-frame)))
(aref (font-info (face-font telega--default-face tframe) tframe) 3)
(frame-char-height))))
(defun telega-chars-in-height (pixels)
"Return how many lines needed to cover PIXELS height."
(ceiling (/ pixels (float (telega-chars-xheight 1)))))
(defun telega-chars-in-width (pixels)
"Return how many characters needed to cover PIXELS width."
;; NOTE: Must not return negative result
(max 0 (ceiling (/ pixels (float (telega-chars-xwidth 1))))))
(defun telega-em-height-ratio ()
"Return font character ratio.
Used to calculate correct image `:height' in `em' elements."
(if-let ((tframe (telega-x-frame)))
(let ((info (font-info (face-font telega--default-face tframe) tframe)))
;; height / pixel size
(/ (float (aref info 3)) (aref info 2)))
1))
(defun telega-em-width-ratio ()
"Return font character ratio.
Used to calculate correct image `:width' in `em' elements."
(if-let ((tframe (telega-x-frame)))
(let ((info (font-info (face-font telega--default-face tframe) tframe)))
;; avg-width / pixel size
(/ (float (aref info 11)) (aref info 2)))
0.5))
(defun telega-strip-newlines (string)
"Strip STRING newlines from end and beginning."
(replace-regexp-in-string
(rx (or (: string-start (* (any ?\r ?\n)))
(: (* (any ?\r ?\n)) string-end)))
""
(or string "")))
(defun telega-window-current-column (&optional window)
"Return current column in the window."
(telega-chars-in-width
(car (window-text-pixel-size window (line-beginning-position) (point)))))
(defun telega-window-string-width (str)
"Return correct width in chars.
This function is very slow comparing to `string-width', however
returns precise value."
(with-temp-buffer
(telega-ins str)
(save-window-excursion
(set-window-dedicated-p nil nil)
(set-window-buffer nil (current-buffer))
(telega-window-current-column))))
(defun telega-current-column ()
"Same as `current-column', but take into account `line-prefix' property.
Also take into account `wrap-prefix' property.
Also take into account `:align-to' display property, used by
`telega-ins--move-to-column'."
(let* ((bol-point (line-beginning-position))
(spoint (point))
(dpoint spoint)
(ccolumn nil))
;; Search the first display with `:align-to' before the point
(while (and (not ccolumn)
(> dpoint bol-point)
(setq dpoint (previous-single-char-property-change
dpoint 'display nil bol-point)))
(let ((disp (get-text-property dpoint 'display)))
(when (and (listp disp) (> (length disp) 2)
(eq (nth 0 disp) 'space)
(eq (nth 1 disp) :align-to))
(setq ccolumn (+ (let ((align-val (nth 2 disp)))
(if (listp align-val)
;; specified in pixels
(/ (car align-val) (telega-chars-xwidth 1))
align-val))
(string-width (buffer-substring dpoint spoint)))))))
(+ (or ccolumn (current-column))
telega--column-offset
(or (when-let ((lwprefix (or (get-text-property bol-point 'line-prefix)
(get-text-property bol-point 'wrap-prefix))))
(string-width lwprefix))
0))))
(defun telega-canonicalize-number (value from-value)
"Canonicalize number VALUE.
VALUE can be a float, in this case take this fraction from FROM-VALUE.
Otherwise use VALUE as is.
MIN-VALUE specifies minimal value after canonicalization.
Used to calculate canonical values for with of some buttons such as
`telega-filter-button-width' and `telega-chat-button-width'."
(let* ((min-value (when (listp value) (nth 1 value)))
(max-value (when (listp value) (nth 2 value)))
(value (if (listp value) (nth 0 value) value))
(canon-value (if (floatp value)
(progn
(cl-assert (< 0 value 1))
(round (* value from-value)))
value))
(ret-min-value (if min-value
(max min-value canon-value)
canon-value)))
(if max-value
(min max-value ret-min-value)
ret-min-value)))
(defun telega-temp-name (prefix &optional ext)
"Generate unique temporary file name with PREFIX and extension EXT.
Specify EXT with leading `.'."
(concat (expand-file-name (make-temp-name prefix) telega-temp-dir) ext))
(defun telega-svg-width (svg)
(dom-attr svg 'width))
(defun telega-svg-height (svg)
(dom-attr svg 'height))
(defun telega-svg-raw-node (svg node-name node-attrs &rest node-childs)
"Add string as is to the SVG."
(svg--def svg (apply 'dom-node node-name node-attrs node-childs)))
(defun telega-svg-clip-path (svg id)
(let ((cp (dom-node 'clipPath `((id . ,id)))))
(svg--def svg cp)
cp))
(defun telega-svg-image-mask (svg mask-id image img-type datap &rest args)
"Create an svg mask using embedded IMAGE."
(let ((mask (dom-node 'mask `((id . ,mask-id)
,@(svg--arguments svg args)))))
(svg--def svg mask)
(apply #'telega-svg-embed mask image img-type datap args)
mask))
(defun telega-svg-path (svg d &rest args)
(svg--append svg (dom-node 'path
`((d . ,d)
,@(svg--arguments svg args)))))
(defun telega-svg-embed (svg image img-type datap &rest args)
"Embed IMAGE possible using `svg-embed-base-uri-image'.
IMAGE could be a list of two elements \\(RELATIVE-FNAME BASE-DIR\\),
so new Emacs `svg-embed-base-uri-image' functionality could be used."
(if (and telega-use-svg-base-uri
(not datap)
;; NOTE: embedding using `:base-uri' does not work under Windows
;; see https://github.com/zevlg/telega.el/issues/367
(not (eq (framep-on-display (telega-x-frame)) 'w32))
(listp image))
(apply #'svg-embed-base-uri-image svg (car image) args)
(apply #'svg-embed svg (if (listp image)
(apply #'expand-file-name image)
image)
img-type datap args)))
(defun telega-svg-gradient (svg id type stops)
"Same as `svg-gradient' but supports \"stop-opacity\" property."
(svg--def
svg
(apply
'dom-node
(if (eq type 'linear)
'linearGradient
'radialGradient)
`((id . ,id)
(x1 . 0)
(x2 . 0)
(y1 . 0)
(y2 . 1))
(mapcar
(lambda (stop)
(dom-node 'stop `((offset . ,(format "%s%%" (car stop)))
(stop-color . ,(cadr stop))
(stop-opacity . ,(plist-get (cddr stop) :opacity)))))
stops))))
(defun telega-svg-progress (svg progress &optional with-border-p)
"Insert progress circle into SVG."
(let* ((w (telega-svg-width svg))
(h (telega-svg-height svg))
(font-size (/ h 4)))
(telega-svg-append-glow-filter svg "glow")
(when with-border-p
(svg-rectangle svg 0 0 w h
:stroke-color "currentColor"
:stroke-width 1
:fill-color "none"))
(svg-text svg (format "%d%%" (round (* progress 100)))
:font-size font-size
:font-family "monospace"
:fill-color "currentColor"
:x "50%"
:text-anchor "middle"
:filter "url(#glow)"
;; Insane Y calculation
:y (+ (/ font-size 3) (/ h 2))
)
svg))
(defun telega-svg-squircle (svg x y width height &rest args)
"In SVG at X and Y positioon draw squircle of WIDTHxHEIGHT size.
X and Y denotes left up corner."
(declare (indent 5))
;; Values are taken from
;; https://upload.wikimedia.org/wikipedia/commons/5/58/Squircle2.svg
(let ((outline (concat "M304,592\n"
"C430.2,592,500.3563,592,546.1782,546.1782\n"
"C592,500.3563,592,430.2,592,304\n"
"C592,177.8,592,107.6437,546.1782,61.8218\n"
"C500.3563,16,430.2,16,304,16\n"
"C177.8,16,107.6437,16,61.8218,61.8218\n"
"C16,107.6437,16,177.8,16,304\n"
"C16,430.2,16,500.3563,61.8218,546.1782\n"
"C107.6437,592,177.8,592,304,592\n"
"Z")))
(setq args (plist-put args :transform
(concat (plist-get args :transform)
" "
(format "translate(%f,%f)" x y)
" "
(format "scale(%f,%f)"
(/ width 608.0) (/ height 608.0)))))
(apply #'telega-svg-path svg outline args)))
(defun telega-svg-apply-outline (svg outline ratio &optional args)
(setq args (plist-put args :transform
(concat (plist-get args :transform)
" "
(format "scale(%s)" ratio))))
(apply #'telega-svg-path svg outline args))
(defun telega-svg-telega-logo (svg width &rest args)
"Draw telega triangle of WIDTH."
(declare (indent 2))
(let ((ratio (/ width 32.0))
(outline (concat "M0,10.1891\n"
"l7.9819,5.5418\n"
"c0.8853,-0.322 1.8202,-0.6638 2.599,-0.9418"
" 1.9609,-0.7 7.0539,-3.4182 7.0539, -3.4182"
" -2.5145,2.2595 -4.6401,4.5613 -6.55, 6.8691\n"
"L17.5694,27\n"
"c0.2653,-0.9309 0.5279,-1.8618 0.9135,-2.9018\n"
"C20.4518,18.4196 32,0 32,0"
" 24.4744,2.555 10.7087,7.5896 7.8333,8.5782"
" 5.5816,9.3523 2.1946,10.5884 0,10.1892\n"
"z")))
(telega-svg-apply-outline svg outline ratio args)))
(defun telega-svg-round-square (svg x y width height radius &rest args)
"In SVG at X and Y positioon draw square with round corners.
RADIUS denotes radius for round corners.
X and Y denotes left up corner."
;; NOTE: Draw 8-corners polygon, and then circles in all four
;; corners
(let ((poly-points (list (cons (+ x radius) y)
(cons (- (+ x width) radius) y)
(cons (+ x width) (+ y radius))
(cons (+ x width) (- (+ y height) radius))
(cons (- (+ x width) radius) (+ y height))
(cons (+ x radius) (+ y height))
(cons x (- (+ y height) radius))
(cons x radius))))
(apply #'svg-polygon svg poly-points args)
;; Four round courners
(apply #'svg-circle svg (+ x radius) (+ y radius) radius args)
(apply #'svg-circle svg (- (+ x width) radius) (+ y radius) radius args)
(apply #'svg-circle svg (- (+ x width) radius) (- (+ height y) radius) radius args)
(apply #'svg-circle svg (+ x radius) (- (+ height y) radius) radius args)
))
(defun telega-svg-premium-logo (svg width &rest args)
"Draw Telegram Premium logo."
(declare (indent 2))
(let ((ratio (/ width 16.0))
(outline (concat "M7.9673,1.7397\n"
"c-0.8215,0.005 -1.3307,3.6214 -1.9924,4.1084"
" -0.6618,0.487 -4.266,-0.102 -4.5151,0.681"
" -0.1812,0.5691 2.5226,2.3763 2.5226,2.3763\n"
"s5.0903,-1.0188 5.181,-0.8892\n"
"c0.1049,0.15 -1.9601,1.3199 -4.5458,2.74"
" -0.3426,1.263 -1.1017,3.0947 -0.6124,3.4457"
" 0.6676,0.4789 3.2046,-2.1477 4.0261,-2.1524"
" 0.8216,-0.005 3.3918,2.5891 4.0535,2.1022"
" 0.6618,-0.487 -1.0488,-3.714 -0.7997,-4.4969"
" 0.2492,-0.7829 3.5078,-2.4236 3.2492,-3.2035"
" -0.2586,-0.7798 -3.852,-0.1518 -4.5196,-0.6306"
" -0.6676,-0.4789 -1.2258,-4.0856 -2.0474,-4.081\n"
"z")))
(telega-svg-apply-outline svg outline ratio args)))
(defun telega-svg-forum-topic-icon (svg width &rest args)
"Draw icon for a forum topic."
(declare (indent 2))
(let ((ratio (/ width 32.0))
(outline (concat "M16.013,3.6908\n"
"C8.426,3.1848 0.3523,10.7055 3.307,18.4956\n"
"c0.6111,2.1934 2.5766,3.9355 3.9238,5.39"
" -0.8542,1.6842 -2.045,3.1894 -3.4501,4.4478"
" 3.0964,0.006 6.2267,-0.6528 8.953,-2.1524"
" 7.2454,1.9045 16.545,-2.9693 16.584,-11.0625"
" 0.028,-6.8663 -6.9149,-11.585 -13.3046,-11.4277\n"
"z")))
(telega-svg-apply-outline svg outline ratio args)))
(defun telega-svg-create (width height &rest args)
"Create SVG image using `svg-create'.
Addresses some issues telega got with pure `svg-create' usage."
;; See https://t.me/emacs_telega/13764
;; Also see https://t.me/emacs_telega/20435
(cl-assert (and (integerp width) (integerp height)))
(apply #'svg-create width height
:xmlns:xlink "http://www.w3.org/1999/xlink" args))
(defun telega-svg-image (svg &rest props)
"Return an image object from SVG.
PROPS is passed on to `create-image' as its PROPS list."
(declare (indent 1))
;; NOTE: work around problem displaying unicode characters in some
;; librsvg versions (in my case 2.40.13). Encoded (in &#xxxx format)
;; text is only displayed correctly if <xml ..?> node is specified
(let ((svg-data (with-temp-buffer
(insert "<?xml version=\"1.0\" encoding=\"UTF-8\"?>")
(svg-print svg)
(buffer-string))))
;; NOTE: Do not check `svg' availability, so it will work when
;; `rsvg' is not compliled in and telega images disabled See
;; https://github.com/zevlg/telega.el/issues/219
(nconc (list 'image :type 'svg :data svg-data)
(unless (plist-member props :scale)
(list :scale
(image-compute-scaling-factor image-scaling-factor)))
props)))
(defun telega-svg-fit-into (width height fit-width fit-height)
"Fit rectangle of WIDTHxHEIGHT size into FIT-WIDTHxFIT-HEIGHT rect.
Do touch outsize scaling.
Return resulting x,y,width,height."
;; NOTE: workaround for zero values for width/height. In some cases
;; width/height might be 0 if photo is sent from tty Emacs instance
;; See https://github.com/zevlg/telega.el/issues/467
(when (telega-zerop width)
(setq width 100))
(when (telega-zerop height)
(setq height 100))
(let* ((w-ratio (/ (float fit-width) width))
(h-ratio (/ (float fit-height) height))
(fit-horiz-p (> (/ (float width) height)
(/ (float fit-width) fit-height)))
(ret-height (if fit-horiz-p
fit-height
(round (* height w-ratio))))
(ret-width (if (not fit-horiz-p)
fit-width
(round (* width h-ratio)))))
(list (- (/ (- ret-width fit-width) 2))
(- (/ (- ret-height fit-height) 2))
ret-width ret-height)))
(defun telega-poll-create-svg (cwidth percents &optional face)
"Create SVG for use in poll options inserter."
(cl-assert (<= percents 100))
(let* ((ndashes (ceiling (* cwidth (/ percents 100.0))))
(dashes-text (propertize
(if (> ndashes 0) (make-string ndashes ?\-) "·")
'face (or face 'bold)))
(telega-text
(concat dashes-text
(make-string (- cwidth (length dashes-text)) ?\s)))
(xheight (telega-chars-xheight 1))
(aw-chars (string-width telega-text))
(xwidth (telega-chars-xwidth aw-chars))
(stroke-xwidth (/ xheight 5))
(dashes-xwidth (* (- (telega-chars-xwidth cwidth) (* 2 stroke-xwidth))
(/ percents 100.0)))
(svg (telega-svg-create xwidth xheight)))
(svg-line svg stroke-xwidth (/ xheight 2)
(+ stroke-xwidth dashes-xwidth) (/ xheight 2)
:stroke-color "currentColor"
:stroke-width stroke-xwidth
:stroke-linecap "round")
(telega-svg-image svg
:scale 1
:width (telega-cw-width aw-chars)
:max-height (telega-ch-height 1)
:mask 'heuristic
:ascent 'center
:telega-text telega-text)))
(defun telega-self-destruct-create-svg (minithumb &optional emoji-symbol)
"Create svg image for the self destructing image with minithumbnail MINITHUMB.
EMOJI-SYMBOL is the emoji symbol to be used. (Default is `telega-symbol-flames')"
(let* ((xh (* (ceiling (/ (nth 3 telega-photo-size-limits) 1.5))
(telega-chars-xheight 1)))
(xw xh)
(svg (telega-svg-create xw xh)))
(when minithumb
(svg-embed svg (base64-decode-string (plist-get minithumb :data))
"image/jpeg" t
:x 0 :y 0 :width xw :height xh))
(svg-circle svg (/ xw 2) (/ xh 2) (/ xh 4)
:fill-color "white"
:fill-opacity "0.75")
(when telega-emoji-font-family
(let ((font-size (/ xw 4)))
(svg-text svg (or emoji-symbol telega-symbol-flames)
:font-family telega-emoji-font-family
:font-size font-size
:x (- (/ xw 2) (/ font-size 1.75))
:y (+ (/ font-size 3) (/ xh 2)))))
(telega-svg-image svg
:scale 1.0
;; TODO: move to `em' width/height
:width xw
:height xh
:ascent 'center)))
(defconst telega-spoiler-turbulence-attrs
'((baseFrequency . "0.1 0.1") (numOctaves . "2"))
"Attributes to the \"feTurbulence\" node.")
(defconst telega-spoiler-displacement-attrs
'((scale . "80"))
"Attributes to the \"feDisplacementMap\" node.")
(defun telega-svg-append-spoiler-node (svg node-id)
"Append spoiler noise node with NODE-ID into SVG."
(svg--append
svg
(dom-node 'filter
`((id . ,node-id))
(dom-node 'feTurbulence
`((type . "turbulence")
(result . "NOISE")
,@telega-spoiler-turbulence-attrs))
(dom-node 'feDisplacementMap
`((in . "SourceGraphic")
(in2 . "NOISE")
(xChannelSelector . "R")
(yChannelSelector . "G")
,@telega-spoiler-displacement-attrs))
)))
(defun telega-spoiler-create-svg (minithumb &optional width height limits)
"Create svg image for MINITHUMB that has spoiler."
(let* ((width (or width (plist-get minithumb :width)))
(height (or height (plist-get minithumb :height)))
(cheight (telega-media--cheight-for-limits width height limits))
(svg (telega-svg-create width height)))
(telega-svg-append-spoiler-node svg "noise")
(svg-embed svg (base64-decode-string (plist-get minithumb :data))
"image/jpeg" t
:x 0 :y 0 :width width :height height
:filter "url(#noise)")
(telega-svg-image svg
:scale 1.0
:height (telega-ch-height cheight)
:telega-nslices cheight
:ascent 'center)))
(defun telega-svg-append-glow-filter (svg node-id &optional std-deviation)
"Create glow filter."
(svg--append
svg
(dom-node 'filter
`((id . ,node-id))
(dom-node 'feGaussianBlur
`((stdDeviation . ,(or std-deviation "3"))
(result . "coloredBlur")))
(dom-node 'feMerge nil
(dom-node 'feMergeNode
`((in . "coloredBlur")))
(dom-node 'feMergeNode
`((in . "SourceGraphic"))))
)))
(defun telega-svg-embed-image-fitting (svg filename data-p img-width img-height
&rest embed-attrs)
"Create svg image by embedding FILENAME image into SVG fitting into its size."
(cl-destructuring-bind (x-fit y-fit w-fit h-fit)
(telega-svg-fit-into img-width img-height
(telega-svg-width svg) (telega-svg-height svg))
(apply #'telega-svg-embed
svg (if data-p
filename
(list (file-name-nondirectory filename)
(file-name-directory filename)))
(format "image/%s"
(if data-p
"jpeg"
(telega-image-supported-file-p filename t)))
data-p :x x-fit :y y-fit :width w-fit :height h-fit
embed-attrs)))
(defun telega-svg-red-play-triangle (svg &optional fill opacity)
"Draw play triangle at the SVG center."
(let* ((svg-w (telega-svg-width svg))
(svg-h (telega-svg-height svg))
(play-size (/ svg-w 3)))
(svg-polygon svg (list (cons (/ (- svg-w play-size) 2)
(/ (- svg-h play-size) 2))
(cons (/ (- svg-w play-size) 2)
(/ (+ svg-h play-size) 2))
(cons (/ (+ svg-w play-size) 2)
(/ svg-h 2)))
:fill (or fill "red")
:opacity (or opacity "0.75"))))
(defun telega-svg-white-play-triangle-in-circle (svg)
"Draw white play triangle in the black circle at the SVG center."
(let* ((width (telega-svg-width svg))
(height (telega-svg-height svg))
(play-size (/ height 8.0))
(xoff (/ play-size 8.0)))
(svg-circle svg (/ width 2) (/ height 2) play-size
:fill "black"
:opacity "0.65")
(svg-polygon svg (list (cons (+ xoff (/ (- width play-size) 2))
(/ (- height play-size) 2))
(cons (+ xoff (/ (- width play-size) 2))
(/ (+ height play-size) 2))
(cons (+ xoff (/ (+ width play-size) 2))
(/ height 2)))
:fill "white"
:opacity "0.65")
svg))
(defun telega-photo-preview--create-svg-one-line (filename data-p width height
&optional video-p)
"Function to create svg image for photo preview."
(let* ((svg-w (telega-chars-xwidth 2))
(svg-h (min svg-w (telega-chars-xheight 1)))
(svg (telega-svg-create svg-w svg-h))
(pclip (telega-svg-clip-path svg "pclip"))
(margin 1))
(telega-svg-round-square pclip margin margin
(- svg-w (* 2 margin)) (- svg-h (* 2 margin))
(/ svg-w 6))
(telega-svg-embed-image-fitting svg filename data-p width height
:clip-path "url(#pclip)")
(when video-p
(telega-svg-red-play-triangle svg))
(telega-svg-image svg
:scale 1.0
:max-height (telega-ch-height 1)
:width (telega-cw-width 2)
:telega-text "[]"
:ascent 'center
:mask 'heuristic
:base-uri (if data-p "" filename))))
(defun telega-video-preview--create-svg-one-line (filename data-p width height)
"Function to create svg image for video preview."
(telega-photo-preview--create-svg-one-line filename data-p width height t))
(defun telega-time-seconds (&optional as-is)
"Return current time as unix timestamp.
If AS-IS is non-nil, then do not apply time adjustment using
`telega-tdlib--unix-time'."
(let ((ctime (floor (time-to-seconds))))
(if as-is
ctime
(+ ctime (- (or (plist-get telega-tdlib--unix-time :remote) 0)
(or (plist-get telega-tdlib--unix-time :local) 0))))))
(defun telega-distance-human-readable (meters)
"Convert METERS to human readable string."
(cond ((not (integerp meters))
"unknown")
((> meters 10000)
(telega-i18n "lng_action_proximity_distance_km"
:count (/ meters 1000)))
((>= meters 1000)
(telega-i18n "lng_action_proximity_distance_km"
:count (telega-float-clamp (/ meters 1000.0) 1)))
(t
(telega-i18n "lng_action_proximity_distance_m"
:count meters))))
(defun telega-number-human-readable (num &optional fmt)
"Convert METERS to human readable string.
By default \"%.1f\" FMT format string is used."
(unless fmt
(setq fmt "%.1f"))
(cond ((and telega-use-short-numbers (>= num 1000000))
(concat (format fmt (/ num 1000000.0)) "M"))
((and telega-use-short-numbers (>= num 1000))
(concat (format fmt (/ num 1000.0)) "k"))
(t
(number-to-string num))))
(defun telega-duration-human-readable (seconds &optional n long-p)
"Convert SECONDS to human readable string.
If N is given, then use only N significant components.
For example if duration is 4h:20m:3s then with N=2 4H:20m will be returned.
By default N=3 (all components).
N can't be 0.
If LONG-P is specified, then use long form."
(cl-assert (or (null n) (> n 0)))
;; NOTE: force seconds to be a number, see
;; https://t.me/emacs_ru/283567?single
(setq seconds (round seconds))
(let ((ncomponents (or n 3))
(intervals
`((,(* 365 7 24 60 60) . ,(concat "lng_years" (unless long-p "_tiny")))
(,(round (* 30.5 7 24 60 60)) . ,(concat "lng_months" (unless long-p "_tiny")))
(,(* 7 24 60 60) . ,(concat "lng_weeks" (unless long-p "_tiny")))
(,(* 24 60 60) . ,(concat "lng_days" (unless long-p "_tiny")))
(,(* 60 60) . ,(concat "lng_hours" (unless long-p "_tiny")))
(60 . ,(concat "lng_minutes" (unless long-p "_tiny")))
(1 . ,(concat "lng_seconds" (unless long-p "_tiny")))))
comps)
(while (and (> ncomponents 0) intervals)
(let* ((ival (car intervals))
(ival-seconds (car ival)))
(when (or (>= seconds ival-seconds)
;; NOTE: special case for 0 SECONDS passed to
;; `telega-duration-human-readable'
(and (null comps) (= seconds 0) (= ival-seconds 1)))
;; NOTE: "lng_hours_tiny" for ru, has leading newline,
;; workaround this problem, looks like a typo on Telegram
;; translation platform
(setq comps (nconc comps (list (telega-strip-newlines
(telega-i18n (cdr ival)
:count (/ seconds ival-seconds)))))
seconds (% seconds ival-seconds)
ncomponents (1- ncomponents)))
(setq intervals (cdr intervals))))
(mapconcat #'identity comps ":")))
(defun telega-time-ago-human-readable (timestamp-ago)
(cond ((< timestamp-ago 60)
(telega-i18n "lng_mediaview_just_now"))
((< timestamp-ago 3600)
(telega-i18n "lng_mediaview_minutes_ago"
:count (/ timestamp-ago 60)))
(t
(telega-i18n "lng_mediaview_hours_ago"
:count (telega-float-clamp (/ timestamp-ago 3600.0) 1)))))
(defun telega-link-props (link-type link-to &rest props)
"Generate props for link button openable with `telega-link--button-action'."
(cl-assert (memq link-type '(url file username user sender hashtag)))
(nconc (list 'action 'telega-link--button-action
:telega-link (cons link-type link-to))
props))
(defun telega-link--button-action (button)
"Browse url at point."
(let ((link (button-get button :telega-link)))
(telega-debug "Action on link: %S" link)
(cl-ecase (car link)
(sender
(telega-describe-msg-sender (cdr link)))
(user
(telega-describe-user (telega-user-get (cdr link))))
(username
(let ((user (telega-user--by-username (cdr link))))
(if user
(telega-describe-user user)
(message (format "Fetching info about %s" (cdr link)))
(telega--searchPublicChat (cdr link)
(lambda (chat)
(if-let ((user (telega-chat-user chat)))
(telega-describe-user user)
(telega-describe-chat chat)))))))
(hashtag
(when telega-chatbuf--chat
(telega-chatbuf-filter-hashtag (cdr link))))
(url
(telega-browse-url (cdr link) current-prefix-arg))
(file
(telega-open-file (cdr link) (telega-msg-at button)))
)))
(defun telega-escape-underscores (text)
"Replace underscores in TEXT's urls and mentions."
;; NOTE: replace _ also in mentions
;; see https://github.com/zevlg/telega.el/issues/143
(let ((rep-rx (rx (and (or (and word-start
(or (and "http" (? "s") "://") "www\."))
(and "@" word-start))
(1+ (not (in " \t\n")))
word-end))))
(replace-regexp-in-string
rep-rx
(lambda (word-text)
(replace-regexp-in-string "_" "\\_" word-text nil t))
text nil t)))
(defun telega-puny-decode-url (url)
"Decode ULR according to the IDNA/punycode algorithm.
See `puny-decode-domain' for details."
(replace-regexp-in-string
(eval-when-compile (rx string-start
(? "http" (? "s") "://")
(group (1+ (regexp "[^/]")))))
(lambda (_)
(save-match-data
(puny-decode-domain (match-string 1 url))))
url nil 'literal 1))
(defun telega--entity-type-to-text-props (ent-type text)
"Convert telegram TextEntityType ENT-TYPE to Emacs text properties."
(nconc
(list :tl-entity-type ent-type)
(cl-case (telega--tl-type ent-type)
(textEntityTypeMention
(telega-link-props 'username text
'face
(if (and (plist-get telega-msg--current
:contains_unread_mention)
(telega-user-match-p (telega-user-me)
(list 'username
(concat "^"
(substring text 1) ;strip @
"$"))))
'(telega-entity-type-mention bold)
'telega-entity-type-mention)))
(textEntityTypeMentionName
(telega-link-props 'user (plist-get ent-type :user_id)
'face
(if (and (plist-get telega-msg--current
:contains_unread_mention)
(eq (plist-get ent-type :user_id)
telega--me-id))
'(telega-entity-type-mention bold)
'telega-entity-type-mention)))
(textEntityTypeHashtag
(telega-link-props 'hashtag text 'face 'telega-link))
(textEntityTypeBold
'(face telega-entity-type-bold))
(textEntityTypeItalic
'(face telega-entity-type-italic))
(textEntityTypeUnderline
'(face telega-entity-type-underline))
(textEntityTypeStrikethrough
'(face telega-entity-type-strikethrough))
(textEntityTypeCode
'(face telega-entity-type-code))
(textEntityTypePre
'(face telega-entity-type-pre))
(textEntityTypePreCode
(if (telega--inhibit-telega-display-p 'telega-core)
'(face telega-entity-type-code)
(let* ((vbar-face (if telega-msg--current
;; NOTE: Use only rainbow color
;; See https://t.me/emacs_telega/43270
(cdr (telega-msg-sender-title-faces
(telega-msg-sender telega-msg--current)))
(list 'telega-blue)))
(vbar (propertize (telega-symbol 'vertical-bar)
'face vbar-face))
(repr (telega-ins--as-string
(telega-ins vbar)
(telega-ins--with-face (nconc (list 'bold 'underline)
vbar-face)
(telega-ins (telega-symbol 'codeblock))
(telega-ins-prefix " "
(telega-ins
(capitalize (telega-tl-str ent-type :language)))))
(telega-ins "\n")
(telega-ins--line-wrap-prefix vbar
(telega-ins--with-face 'telega-entity-type-code
(telega-ins (telega--desurrogate-apply text)))))))
(list 'telega-display repr
'telega-display-by 'telega-core))))
(textEntityTypeUrl
;; - Unhexify url, using `telega-display' property to be
;; substituted at `telega--desurrogate-apply' time
;; - Convert "xn--" domains to non-ascii version
(nconc (unless (telega--inhibit-telega-display-p 'telega-core)
(list 'telega-display (telega-puny-decode-url
(decode-coding-string
(url-unhex-string text) 'utf-8))))
(telega-link-props 'url text
'face 'telega-entity-type-texturl)))
(textEntityTypeTextUrl
(telega-link-props 'url (telega-tl-str ent-type :url)
'face 'telega-entity-type-texturl
'help-echo (telega-tl-str ent-type :url)))
(textEntityTypeBotCommand
'(face telega-entity-type-botcommand))
(textEntityTypeMediaTimestamp
(list 'action (lambda (button)
(telega-msg-open-media-timestamp
(telega-msg-at button)
(plist-get ent-type :media_timestamp)))
'face 'telega-link))
(textEntityTypeSpoiler
(if (telega--inhibit-telega-display-p 'telega-core)
'(face telega-entity-type-spoiler)
(unless (plist-get ent-type :telega-show-spoiler)
(list :action #'telega-msg-remove-text-spoiler
'telega-display
(with-temp-buffer
(insert text)
(translate-region (point-min) (point-max)
telega-spoiler-translation-table)
(propertize (buffer-string)
'face 'telega-entity-type-spoiler))
'telega-display-by 'telega-core))))
(textEntityTypeCustomEmoji
(when telega-use-images
(when-let ((sticker (gethash (plist-get ent-type :custom_emoji_id)
telega--custom-emoji-stickers)))
(list 'display (telega-sticker--image sticker)))))
(textEntityTypeBlockQuote
(if (telega--inhibit-telega-display-p 'telega-core)
'(face telega-entity-type-blockquote)
(list 'telega-display
(telega-ins--as-string
(telega-ins--line-wrap-prefix (telega-symbol 'vertical-bar)
(telega-ins--with-face 'telega-entity-type-blockquote
(telega-ins (telega--desurrogate-apply text)))))
'telega-display-by 'telega-core)))
)))
;; https://core.telegram.org/bots/api#markdown-style
(defsubst telega--entity-to-markdown (entity-text)
"Convert ENTITY back to markdown syntax applied to TEXT.
ENTITY-TEXT is cons cell where car is the ENTITY and cdr is the TEXT.
Return now text with markdown syntax."
;; NOTE: text might have surrogated pairs, for example when editing
;; message with emojis
(let ((ent-type (plist-get (car entity-text) :type))
(text (cdr entity-text)))
(cl-case (and ent-type (telega--tl-type ent-type))
(textEntityTypeBold (concat "*" text "*"))
(textEntityTypeItalic (concat "_" text "_"))
(textEntityTypeUnderline (concat "__" text "__"))
(textEntityTypeStrikethrough (concat "~" text "~"))
(textEntityTypeCode (concat "`" text "`"))
((textEntityTypePreCode textEntityTypePre)
(concat "```" (plist-get ent-type :language) "\n" text "```"))
(textEntityTypeMentionName