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telega-media.el
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;;; telega-media.el --- Media support for telega -*- lexical-binding:t -*-
;; Copyright (C) 2018-2019 by Zajcev Evgeny.
;; Author: Zajcev Evgeny <zevlg@yandex.ru>
;; Created: Tue Jul 10 15:20:09 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:
;; Code to work with media in telega:
;; - Download/upload files to cloud
;; - Thumbnails
;; - Stickers
;; - Animations
;; - Web pages
;; etc
;;; Code:
(require 'telega-core)
(require 'telega-tdlib)
(declare-function telega-root-view--update "telega-root" (on-update-prop &rest args))
(declare-function telega-chat-color "telega-chat" (chat))
(declare-function telega-chat-title "telega-chat" (chat &optional with-username))
(declare-function telega-msg-redisplay "telega-msg" (msg))
(declare-function telega-image-view-file "telega-modes" (tl-file &optional for-msg))
;;; Files downloading/uploading
(defun telega-file--ensure (file)
"Ensure FILE is in `telega--files'.
Return FILE.
As side-effect might update root view, if current root view is \"Files\"."
(when telega-debug
(cl-assert file))
(plist-put file :telega-file-recency (telega-time-seconds))
(puthash (plist-get file :id) file telega--files)
(telega-root-view--update :on-file-update file)
file)
(defun telega-file-get (file-id &optional locally)
"Return file associated with FILE-ID."
(or (gethash file-id telega--files)
(unless locally
(telega-file--ensure (telega--getFile file-id)))))
(defun telega-file--renew (place prop)
"Renew file value at PLACE and PROP."
(when-let* ((ppfile (plist-get place prop))
(file-id (plist-get ppfile :id))
(file (or (gethash file-id telega--files)
(telega-file--ensure ppfile))))
(plist-put place prop file)
file))
(defun telega-file--update (file)
"FILE has been updated, call any pending callbacks."
(let* ((file-id (plist-get file :id))
(old-file (gethash file-id telega--files))
(throttle-p
;; NOTE: Throttle number of update callbacks calls
;; Throttle only if `:downloaded_size'/`:uploaded_size'
;; property advances more then 1/100s part of the file size
;; See https://github.com/zevlg/telega.el/issues/164
(or (and (telega-file--uploading-p file)
(telega-file--uploading-p old-file)
(< (- (telega-file--uploading-progress file)
(telega-file--uploading-progress old-file))
0.01))
(and (telega-file--downloading-p file)
(telega-file--downloading-p old-file)
(< (- (telega-file--downloading-progress file)
(telega-file--downloading-progress old-file))
0.01)))))
(unless throttle-p
(telega-file--ensure file)
(let* ((callbacks (gethash file-id telega--files-updates))
(left-cbs (cl-loop for cb in callbacks
when (funcall cb file)
collect cb)))
(telega-debug "%s %S started with %d callbacks, left %d callbacks"
(propertize "FILE-UPDATE" 'face 'bold)
file-id (length callbacks) (length left-cbs))
(if left-cbs
(puthash file-id left-cbs telega--files-updates)
(remhash file-id telega--files-updates))
(when (and (not (telega-file--downloaded-p old-file))
(telega-file--downloaded-p file))
(run-hook-with-args 'telega-file-downloaded-hook file))
))))
(defun telega-file--callback-wrap (callback check-fun)
"Wrapper for CALLBACK.
Removes callback in case downloading is canceled or completed."
(when callback
(lambda (file)
(funcall callback file)
(funcall check-fun file))))
(defun telega-file--ensure-update-callback (file-id update-callback)
"Ensure FILE-ID is monitored with UPDATE-CALLBACK."
(cl-assert update-callback)
(let ((cb-list (gethash file-id telega--files-updates)))
(unless (memq update-callback cb-list)
(puthash file-id (cons update-callback cb-list)
telega--files-updates))))
(defun telega-file--download (file &optional priority callback
&rest parts)
"Download file denoted by FILE-ID.
PRIORITY - (1-32) the higher the PRIORITY, the earlier the file
will be downloaded. (default=1)
Run CALLBACK every time FILE gets updated.
To cancel downloading use `telega--cancelDownloadFile', it will
remove the callback as well.
PARTS - list of file parts to download sequentually."
(declare (indent 2))
;; - If file already downloaded, then just call the callback
;; - If file already downloading, then just install the callback
;; - If file can be downloaded, then start downloading file and
;; install callback after file started downloading
(let* ((file-id (plist-get file :id))
(dfile (telega-file-get file-id))
(cbwrap (telega-file--callback-wrap
callback 'telega-file--downloading-p)))
(cond ((telega-file--downloaded-p dfile)
(when cbwrap
(funcall cbwrap dfile)))
((or (telega-file--downloading-p dfile)
(telega-file--can-download-p dfile))
(when cbwrap
(telega-file--ensure-update-callback file-id cbwrap))
(unless (telega-file--downloading-p dfile)
(let ((next-parts (cdr parts)))
(telega--downloadFile file-id
:priority priority
:offset (car (car parts))
:limit (cdr (car parts))
:sync-p next-parts
;; NOTE: Continue downloading other parts
;; If downloading is canceled, callback is not called,
;; this is exactly what we want
:callback
(lambda (downfile)
;; NOTE: update callback maybe deleted,
;; before file actually starts
;; downloading
(when (and cbwrap (not next-parts))
(telega-file--ensure-update-callback file-id cbwrap))
(telega-file--update downfile)
(when next-parts
(apply #'telega-file--download downfile
priority callback next-parts))))))))))
(defun telega-file--upload-internal (file &optional callback)
"Monitor FILE uploading progress by installing CALLBACK."
(declare (indent 1))
(let* ((file-id (plist-get file :id))
(cbwrap (telega-file--callback-wrap
callback 'telega-file--uploading-p)))
(if (telega-file--uploaded-p file)
(when cbwrap
(funcall cbwrap file))
(when cbwrap
(let ((cb-list (gethash file-id telega--files-updates)))
(puthash file-id (cons cbwrap cb-list)
telega--files-updates))))
file))
(defun telega-file--upload (filename &optional file-type priority callback)
"Upload FILENAME to the cloud.
Return file object, obtained from `telega--uploadFile'."
(declare (indent 3))
(let ((file (telega--uploadFile
(expand-file-name filename) file-type priority)))
(telega-file--upload-internal file callback)
file))
;; TODO: use `telega-msg--content-file' instead
(defun telega-file--used-in-msg (msg)
"Return File object associated with MSG.
Return nil if no File object is associated with the message."
(let* ((content (plist-get msg :content))
(file (cl-case (telega--tl-type content)
(messageDocument
(telega--tl-get content :document :document))
(messageAudio
(telega--tl-get content :audio :audio))
(messageVideo
(telega--tl-get content :video :video))
(messageVoiceNote
(telega--tl-get content :voice_note :voice))
(messageVideoNote
(telega--tl-get content :video_note :video))
;; TODO: add other message types
)))
(or (gethash (plist-get file :id) telega--files)
file)))
;;; Photos
(defmacro telega-thumbnail--get (type thumbnails)
"Get thumbnail of TYPE from list of THUMBNAILS.
Thumbnail TYPE and its sizes:
\"s\" box 100x100
\"m\" box 320x320
\"x\" box 800x800
\"y\" box 1280x1280
\"w\" box 2560x2560
\"a\" crop 160x160
\"b\" crop 320x320
\"c\" crop 640x640
\"d\" crop 1280x1280"
`(cl-find ,type ,thumbnails :test 'string= :key (telega--tl-prop :type)))
(defun telega-photo--highres (photo)
"Return thumbnail of highest resolution for the PHOTO.
Return thumbnail that can be downloaded."
(cl-some (lambda (tn)
(let ((tn-file (telega-file--renew tn :photo)))
(when (or (telega-file--downloaded-p tn-file)
(telega-file--can-download-p tn-file))
tn)))
;; From highest res to lower
(reverse (plist-get photo :sizes))))
(defun telega-photo--thumb (photo)
"While downloading best photo, get small thumbnail for the PHOTO."
(let ((photo-sizes (plist-get photo :sizes)))
(or (cl-some (lambda (tn)
(when (telega-file--downloaded-p
(telega-file--renew tn :photo))
tn))
photo-sizes)
(cl-some (lambda (tn)
(when (telega-file--downloading-p
(telega-file--renew tn :photo))
tn))
photo-sizes)
(cl-some (lambda (tn)
(when (telega-file--can-download-p
(telega-file--renew tn :photo))
tn))
photo-sizes)
)))
(defun telega-photo--best (photo &optional limits)
"Select best thumbnail from PHOTO suiting LIMITS.
By default LIMITS is `telega-photo-size-limits'."
(unless limits
(setq limits telega-photo-size-limits))
(let ((lim-xwidth (telega-chars-xwidth (nth 2 limits)))
(lim-xheight (telega-chars-xheight (nth 3 limits)))
ret)
;; NOTE: `reverse' is used to start from highes sizes
(seq-doseq (thumb (reverse (plist-get photo :sizes)))
(let* ((thumb-file (telega-file--renew thumb :photo))
(tw (plist-get thumb :width))
(th (plist-get thumb :height)))
;; NOTE: By default (not ret) use any downloadable file, even
;; if size does not fits
;; Select sizes larger then limits, because downscaling works
;; betten then upscaling
(when (and (or (telega-file--downloaded-p thumb-file)
(and (telega-file--can-download-p thumb-file)
(not (telega-file--downloaded-p
(plist-get ret :photo)))))
(or (not ret)
(and (>= tw lim-xwidth)
(>= th lim-xheight)))
;; NOTE: prefer thumbs with `:progressive_sizes' set
(or (not ret)
(and (telega-file--can-download-p (plist-get ret :photo))
(not (plist-get ret :progressive_sizes))
(plist-get thumb :progressive_sizes)))
)
(setq ret thumb))))
ret))
(defun telega-photo--open (photo &optional for-msg)
"Download highres PHOTO asynchronously and open it as a file.
If FOR-MSG is non-nil, then FOR-MSG is message containing PHOTO."
(let* ((hr (telega-photo--highres photo))
(hr-file (telega-file--renew hr :photo)))
(telega-file--download hr-file 32
(lambda (tl-file)
(when for-msg
(telega-msg-redisplay for-msg))
(when (telega-file--downloaded-p tl-file)
(when (telega--tl-get for-msg :content :is_secret)
(telega--openMessageContent for-msg))
(if (memq 'photo telega-open-message-as-file)
(telega-open-file (telega--tl-get tl-file :local :path) for-msg)
(telega-image-view-file tl-file for-msg)))))))
(defun telega-image--telega-text (img &optional slice-num)
"Return text version for image IMG and its slice SLICE-NUM.
Return nil if `:telega-text' is not specified in IMG."
(let ((tt (plist-get (cdr img) :telega-text)))
(cond ((null tt) nil)
((and (stringp tt) (string-empty-p tt)) nil)
((stringp tt) tt)
((listp tt)
(if slice-num
(progn
(cl-assert (> (length tt) slice-num))
(nth slice-num tt))
(mapconcat 'identity tt "\n")))
(t (cl-assert nil nil "Invalid value for :telega-text=%S" tt)))))
(defun telega-media--cheight-for-limits (width height limits)
"Calculate cheight for image of WIDTHxHEIGHT size fitting into LIMITS."
(let ((ratio (min (/ (float (telega-chars-xwidth (nth 2 limits))) width)
(/ (float (telega-chars-xheight (nth 3 limits))) height))))
(if (< ratio 1.0)
(telega-chars-in-height (floor (* height ratio)))
(let ((cheight (telega-chars-in-height height)))
(if (< cheight (nth 1 limits))
(nth 1 limits)
(cl-assert (<= cheight (nth 3 limits)))
cheight))
)))
(defun telega-media--cwidth-xmargin (width height char-height &optional _max-cwidth)
"Calculate width in chars and margins X pixels.
MAX-CWIDTH is maximum width in chars.
Return cons cell, where car is width in char and cdr is margin value."
;; NOTE: handle case where WIDTH or HEIGHT can be zero
(let* ((pix-h (telega-chars-xheight char-height))
(pix-w (if (zerop height)
0
(* (/ (float width) height) pix-h)))
(cw (telega-chars-in-width pix-w))
(xmargin (/ (- (telega-chars-xwidth cw) pix-w) 2)))
; (cl-assert (> cw 0))
(cons cw (floor xmargin))))
(defun telega-media--progress-svg (file width height cheight)
"Generate svg showing downloading progress for FILE."
(let* ((xh (telega-chars-xheight cheight))
(cwidth-xmargin (telega-media--cwidth-xmargin
(if (zerop width) xh width)
(if (zerop height) xh height) cheight))
(w-chars (car cwidth-xmargin))
(xw (telega-chars-xwidth w-chars))
(svg (telega-svg-create xw xh))
(progress (telega-file--downloading-progress file)))
(telega-svg-progress svg progress)
(telega-svg-image svg :scale 1.0
:width xw :height xh
:ascent 'center
:mask 'heuristic
;; text of correct width
:telega-text (make-string w-chars ?X))))
(defsubst telega-photo--progress-svg (photo cheight)
"Generate svg for the PHOTO."
(telega-media--progress-svg
(telega-file--renew photo :photo)
(plist-get photo :width)
(plist-get photo :height)
cheight))
(defun telega-media--create-image (file width height &optional cheight
progressive-sizes)
"Create image to display FILE.
WIDTH and HEIGHT specifies size of the FILE's image.
CHEIGHT is the height in chars to use (default=1).
PROGRESSIVE-SIZES specifies list of jpeg's progressive file sizes."
(unless cheight
(setq cheight 1))
(if (or (telega-file--downloaded-p file)
(and progressive-sizes
(>= (telega-file--downloaded-size file)
(car progressive-sizes))))
(let ((cw-xmargin (telega-media--cwidth-xmargin width height cheight))
(image-filename (telega--tl-get file :local :path)))
;; NOTE: Handle case when file is partially downloaded and
;; some progressive size is reached. In this case create
;; temporary image file writing corresponding progress bytes
;; into it and displaying it
(unless (telega-file--downloaded-p file)
(let* ((tmp-size (cl-find (telega-file--downloaded-size file)
(reverse progressive-sizes) :test #'>=))
(tmp-fname (expand-file-name
(format "%s-%d.%s"
(file-name-base image-filename)
tmp-size
(file-name-extension image-filename))
telega-temp-dir))
(coding-system-for-write 'binary))
(unless (file-exists-p tmp-fname)
(telega-debug "Creating progressive img: %d / %S -> %s"
(telega-file--downloaded-size file)
progressive-sizes
tmp-fname)
(with-temp-buffer
(set-buffer-multibyte nil)
(insert-file-contents-literally image-filename)
(write-region 1 (+ 1 tmp-size) tmp-fname nil 'quiet)))
(setq image-filename tmp-fname)))
(telega-create-image
(if (string-empty-p image-filename)
(telega-etc-file "non-existing.jpg")
image-filename)
(when (fboundp 'imagemagick-types) 'imagemagick) nil
:height (telega-chars-xheight cheight)
:scale 1.0
:ascent 'center
:margin (cons (cdr cw-xmargin) 0)
:telega-text (make-string (car cw-xmargin) ?X)))
(telega-media--progress-svg file width height cheight)))
(defun telega-minithumb--create-image (minithumb cheight)
"Create image and use MINITHUMB minithumbnail as data."
(let* ((xwidth (plist-get minithumb :width))
(xheight (plist-get minithumb :height))
(cwidth-xmargin (telega-media--cwidth-xmargin xwidth xheight cheight)))
(telega-create-image
(base64-decode-string (plist-get minithumb :data))
(if (and (fboundp 'image-transforms-p)
(funcall 'image-transforms-p))
'jpeg
(when (fboundp 'imagemagick-types)
'imagemagick))
t
:height (telega-chars-xheight cheight)
:scale 1.0
:ascent 'center
:margin (cons (cdr cwidth-xmargin) 0)
:telega-text (make-string (car cwidth-xmargin) ?X))))
(defun telega-thumb--create-image (thumb &optional _file cheight)
"Create image for the thumbnail THUMB.
THUMB could be `photoSize' or `thumbnail'.
CHEIGHT is the height in chars (default=1)."
(telega-media--create-image
(let ((thumb-tl-type (telega--tl-type thumb)))
(if (eq thumb-tl-type 'photoSize)
(telega-file--renew thumb :photo)
(cl-assert (eq thumb-tl-type 'thumbnail))
(telega-file--renew thumb :file)))
(plist-get thumb :width)
(plist-get thumb :height)
cheight
(append (plist-get thumb :progressive_sizes) nil)))
(defun telega-thumb--create-image-one-line (thumb &optional file)
"Create image for thumbnail (photoSize) for one line use."
(telega-thumb--create-image thumb file 1))
(defun telega-thumb--create-image-two-lines (thumb &optional file)
"Create image for thumbnail (photoSize) for two lines use."
(telega-thumb--create-image thumb file 2))
(defun telega-thumb--create-image-three-lines (thumb &optional file)
"Create image for thumbnail (photoSize) for three lines use."
(telega-thumb--create-image thumb file 3))
(defun telega-thumb--create-image-as-is (thumb &optional file)
"Create image for thumbnail THUMB (photoSize) with size as is."
(telega-thumb--create-image
thumb file (telega-chars-in-height (plist-get thumb :height))))
(defun telega-thumb-or-minithumb--create-image (tl-obj &optional _file
custom-thumb
custom-minithumb)
"Create image fol TL-OBJ that has :thumbnail and/or :minithumbnail prop."
(let* ((thumb (or custom-thumb (plist-get tl-obj :thumbnail)))
(thumb-cheight (telega-media--cheight-for-limits
(plist-get thumb :width)
(plist-get thumb :height)
telega-thumbnail-size-limits))
(thumb-file (telega-file--renew thumb :file))
(minithumb (or custom-minithumb (plist-get tl-obj :minithumbnail))))
(cond ((telega-file--downloaded-p thumb-file)
(telega-thumb--create-image
thumb thumb-file thumb-cheight))
(minithumb
(telega-minithumb--create-image
minithumb thumb-cheight))
(t
(telega-thumb--create-image
thumb thumb-file thumb-cheight)))))
(defun telega-msg--preview-photo-image (msg)
"Return one line preview for the photo message MSG.
Return nil if preview image is unavailable."
(when (and telega-use-images
(telega-chat-match-p (telega-msg-chat msg 'offline)
telega-use-one-line-preview-for))
(let* ((photo (telega--tl-get msg :content :photo))
(best (telega-photo--best photo '(1 1 1 1)))
(minithumb (plist-get photo :minithumbnail))
(cached-preview
(plist-get photo :telega-preview-1))
(preview-new
(cond ((and (telega-file--downloaded-p (plist-get best :photo))
(not (eq 'best (car cached-preview))))
(cons 'best
(telega-preview-one-line-create-svg
(telega--tl-get best :photo :local :path) nil
(plist-get best :width) (plist-get best :height))))
(cached-preview
cached-preview)
(minithumb
(cons 'mini
(telega-preview-one-line-create-svg
(base64-decode-string (plist-get minithumb :data)) t
(plist-get minithumb :width)
(plist-get minithumb :height)))))))
(plist-put photo :telega-preview-1 preview-new)
(cdr preview-new))))
(defun telega-msg--preview-video-image (msg)
"Return one line preview for the video message MSG..
Return nil if preview image is unavailable."
(when (and telega-use-images
(telega-chat-match-p (telega-msg-chat msg 'offline)
telega-use-one-line-preview-for))
(let* ((video (telega--tl-get msg :content :video))
(thumb (plist-get video :thumbnail))
(minithumb (plist-get video :minithumbnail))
(cached-preview
(plist-get video :telega-preview-1))
(preview-new
(cond ((and thumb
(memq (telega--tl-type (plist-get thumb :format))
'(thumbnailFormatJpeg thumbnailFormatPng))
(telega-file--downloaded-p (plist-get thumb :file))
(not (eq 'best (car cached-preview))))
(cons 'best
(telega-preview-one-line-create-svg
(telega--tl-get thumb :file :local :path) nil
(plist-get thumb :width) (plist-get thumb :height)
'video)))
(cached-preview
cached-preview)
(minithumb
(cons 'mini
(telega-preview-one-line-create-svg
(base64-decode-string (plist-get minithumb :data)) t
(plist-get minithumb :width)
(plist-get minithumb :height)
'video))))))
(plist-put video :telega-preview-1 preview-new)
(cdr preview-new))))
(defun telega-audio--create-image (audio &optional file)
"Function to create image for AUDIO album cover."
(telega-thumb-or-minithumb--create-image
audio file
(plist-get audio :album_cover_thumbnail)
(plist-get audio :album_cover_minithumbnail)))
(defun telega-media--image-update (obj-spec file &optional cache-prop)
"Called to update the image contents for the OBJ-SPEC.
OBJ-SPEC is cons of object and create image function.
Create image function accepts two arguments - object and FILE.
Return updated image, cached or created with create image function.
CACHE-PROP specifies property name to cache image at OBJ-SPEC.
Default is `:telega-image'."
(let ((cached-image (plist-get (car obj-spec) (or cache-prop :telega-image)))
(simage (funcall (cdr obj-spec) (car obj-spec) file)))
;; NOTE: Sometimes `create' function returns nil results
(when (and telega-use-images (not simage))
(error "telega: [BUG] Image create (%S %S %S) -> nil"
(cdr obj-spec) (car obj-spec) file))
(unless (equal cached-image simage)
;; Update the image
(if cached-image
(setcdr cached-image (cdr simage))
(setq cached-image simage))
(plist-put (car obj-spec) (or cache-prop :telega-image) cached-image))
cached-image))
(defun telega-media--image (obj-spec file-spec &optional force-update cache-prop)
"Return image for media object specified by OBJ-SPEC.
File is specified with FILE-SPEC.
CACHE-PROP specifies property name to cache image at OBJ-SPEC.
Default is `:telega-image'."
(let ((cached-image (plist-get (car obj-spec) (or cache-prop :telega-image))))
(when (or force-update (not cached-image))
(let ((media-file (telega-file--renew (car file-spec) (cdr file-spec))))
;; First time image is created or update is forced
(setq cached-image
(telega-media--image-update obj-spec media-file cache-prop))
;; Possible initiate file downloading
(when (and telega-use-images
(or (telega-file--need-download-p media-file)
(telega-file--downloading-p media-file)))
(telega-file--download media-file nil
(lambda (dfile)
(telega-media--image-update obj-spec dfile cache-prop)
(force-window-update))))))
cached-image))
(defun telega-photo--image (photo limits)
"Return best suitable image for the PHOTO."
(let* ((best (telega-photo--best photo limits))
(cheight (telega-media--cheight-for-limits
(plist-get best :width)
(plist-get best :height)
limits))
(create-image-fun
(progn
(cl-assert (> cheight 0))
(cl-assert (<= cheight (nth 3 limits)))
(lambda (_photoignored &optional _fileignored)
;; 1) FILE downloaded, show photo
;; 2) Thumbnail is downloaded, use it
;; 2.5) Minithumbnail is available, use it
;; 3) FILE downloading, fallback to progress svg
(let ((best-file (telega-file--renew best :photo)))
(if (telega-file--downloaded-p best-file)
(telega-thumb--create-image best best-file cheight)
(let* ((thumb (telega-photo--thumb photo))
(thumb-file (telega-file--renew thumb :photo)))
(if (telega-file--downloaded-p thumb-file)
(telega-thumb--create-image thumb thumb-file cheight)
(if-let ((minithumb (plist-get photo :minithumbnail)))
(telega-minithumb--create-image minithumb cheight)
(telega-photo--progress-svg best cheight))))))))))
(telega-media--image
(cons photo create-image-fun)
(cons best :photo)
'force-update)))
(defun telega-avatar--title-text (sender)
"Create textual avatar for the SENDER (chat or user).
Return string of width 3."
(let ((title (telega-msg-sender-title sender))
(title-faces (telega-msg-sender-title-faces sender)))
(if telega-avatar-text-compose-chars
(concat (propertize (compose-chars (aref telega-symbol-circle 0)
(aref title 0))
'face title-faces)
" ")
(concat "("
(propertize (substring title 0 1) 'face title-faces)
")"))))
(defun telega-avatar--create-image (sender file &optional cheight addon-function)
"Create SENDER (char or user) avatar image.
CHEIGHT specifies avatar height in chars, default is 2."
;; NOTE:
;; - For CHEIGHT==1 align avatar at vertical center
;; - For CHEIGHT==2 make svg height to be 3 chars, so if font size
;; is increased, there will be no gap between two slices
(unless cheight (setq cheight 2))
(let* ((base-dir (telega-base-directory))
(photofile (telega--tl-get file :local :path))
(factors (alist-get cheight telega-avatar-factors-alist))
(cfactor (or (car factors) 0.9))
(mfactor (or (cdr factors) 0.1))
(xh (telega-chars-xheight cheight))
(margin (* mfactor xh))
(ch (* cfactor xh))
(cfull (floor (+ ch margin)))
(aw-chars (telega-chars-in-width ch))
(aw-chars-3 (if (> aw-chars 3) (- aw-chars 3) 0))
(svg-xw (telega-chars-xwidth aw-chars))
(svg-xh (cond ((= cheight 1) cfull)
((= cheight 2) (+ cfull (telega-chars-xheight 1)))
(t xh)))
(svg (telega-svg-create svg-xw svg-xh))
(name (telega-msg-sender-title sender)))
(if (telega-file-exists-p photofile)
(let ((img-type (image-type-from-file-name photofile))
(clip (telega-svg-clip-path svg "clip")))
(svg-circle clip (/ svg-xw 2) (/ cfull 2) (/ ch 2))
(telega-svg-embed svg (list (file-relative-name photofile base-dir)
base-dir)
(format "image/%S" img-type)
nil
:x (/ (- svg-xw ch) 2) :y (/ margin 2)
:width ch :height ch
:clip-path "url(#clip)"))
;; Draw initials
(let ((fsz (/ ch 2))
(colors (telega-msg-sender-color sender)))
(svg-gradient svg "cgrad" 'linear
(list (cons 0 (telega-color-name-as-hex-2digits
(or (nth 1 colors) "gray75")))
(cons ch (telega-color-name-as-hex-2digits
(or (nth 0 colors) "gray25")))))
(svg-circle svg (/ svg-xw 2) (/ cfull 2) (/ ch 2) :gradient "cgrad")
(svg-text svg (substring name 0 1)
:font-size (/ ch 2)
:font-weight "bold"
:fill "white"
:font-family "monospace"
;; XXX insane X/Y calculation
:x (- (/ svg-xw 2) (/ fsz 3))
:y (+ (/ fsz 3) (/ cfull 2)))))
;; XXX: Apply additional function, used by `telega-patrons-mode'
;; Also used to outline currently speaking users in voice chats
(when addon-function
(funcall addon-function svg (list (/ svg-xw 2) (/ cfull 2) (/ ch 2))))
(telega-svg-image svg :scale 1.0
:width svg-xw :height svg-xh
:ascent 'center
:mask 'heuristic
:base-uri (expand-file-name "dummy" base-dir)
;; Correct text for tty-only avatar display
:telega-text
(cons (concat (telega-avatar--title-text sender)
(make-string aw-chars-3 ?\u00A0))
(mapcar (lambda (_ignore)
(make-string (+ 3 aw-chars-3) ?\u00A0))
(make-list (1- cheight) 'not-used))))
))
(defun telega-avatar--create-image-one-line (sender file)
"Create SENDER (chat or user) avatar image for one line use."
(telega-avatar--create-image sender file 1))
(defun telega-avatar--create-image-three-lines (sender file)
"Create SENDER (chat or user) avatar image for three lines use."
(telega-avatar--create-image sender file 3))
(defun telega-msg-sender-avatar-image (msg-sender
&optional create-image-fun
force-update cache-prop)
"Create avatar image for the MSG-SENDER.
By default CREATE-IMAGE-FUN is `telega-avatar--create-image'."
(cl-assert msg-sender)
(telega-media--image
(cons msg-sender (or create-image-fun #'telega-avatar--create-image))
(if (telega-user-p msg-sender)
(cons (plist-get msg-sender :profile_photo) :small) ;user
(cl-assert (telega-chat-p msg-sender))
(cons (plist-get msg-sender :photo) :small)) ;chat
force-update cache-prop))
(defun telega-msg-sender-avatar-image-one-line (msg-sender
&optional create-image-fun
force-update cache-prop)
"Create one-line avatar for the MSG-SENDER.
By default CREATE-IMAGE-FUN is `telega-avatar--create-image-one-line'."
(telega-msg-sender-avatar-image
msg-sender (or create-image-fun #'telega-avatar--create-image-one-line)
force-update (or cache-prop :telega-avatar-1)))
(defun telega-msg-sender-avatar-image-three-lines (msg-sender
&optional create-image-fun
force-update cache-prop)
"Create three lines avatar for the MSG-SENDER.
By default CREATE-IMAGE-FUN is `telega-avatar--create-image-three-lines'."
(telega-msg-sender-avatar-image
msg-sender (or create-image-fun #'telega-avatar--create-image-three-lines)
force-update (or cache-prop :telega-avatar-3)))
;; Location
(defun telega-map--create-image (map &optional _file)
"Create map image for location MAP."
(let* ((base-dir (telega-base-directory))
(map-photo (telega-file--renew map :photo))
(map-photofile (when map-photo
(telega--tl-get map-photo :local :path)))
(map-loc (plist-get map :map-location)) ;at image center
(user-loc (plist-get map :user-location))
(width (plist-get map :width))
(height (plist-get map :height))
(user-loc-off
(telega-location-distance map-loc user-loc 'components))
(user-y (+ (/ height 2)
(telega-map--distance-pixels
(car user-loc-off) user-loc (plist-get map :zoom))))
(user-x (+ (/ width 2)
(telega-map--distance-pixels
(cdr user-loc-off) user-loc (plist-get map :zoom))))
(svg (telega-svg-create width height)))
(cl-assert (and (integerp width) (integerp height)))
(if (and (telega-file--downloaded-p map-photo)
(telega-file-exists-p map-photofile))
(telega-svg-embed svg (list (file-relative-name map-photofile base-dir)
base-dir)
"image/png" nil
:x 0 :y 0 :width width :height height)
(svg-rectangle svg 0 0 width height
:fill-color (telega-color-name-as-hex-2digits
(or (face-foreground 'shadow) "gray50"))))
;; Show user's avatar
;; - :heading - direction of user's POV
;;
;; TODO: calculate avatar possition according to
;; map-loc/user-loc, they can differ
;;
;; TODO: show other users close enough to `:sender'
(when-let* ((raw-sender (plist-get map :sender))
(sender (telega-msg-sender raw-sender))
(sender-photo (if (telega-user-p sender)
(telega--tl-get sender :profile_photo :small)
(cl-assert (telega-chat-p sender))
(telega--tl-get sender :photo :small))))
(when (telega-file--downloaded-p sender-photo)
(let* ((photofile (telega--tl-get sender-photo :local :path))
(img-type (image-type-from-file-name photofile))
(clip (telega-svg-clip-path svg "user-clip"))
(sz (/ (plist-get map :height) 8))
(sz2 (/ sz 2)))
(svg-circle clip (+ user-x sz2) (- user-y sz2) sz2)
(svg-polygon clip (list (cons user-x user-y)
(cons (+ user-x (/ sz2 4))
(- user-y sz2))
(cons (+ user-x sz2)
(- user-y (/ sz2 4)))))
(telega-svg-embed svg (list (file-relative-name photofile base-dir)
base-dir)
(format "image/%S" img-type) nil
:x user-x :y (- user-y sz)
:width sz :height sz
:clip-path "url(#user-clip)"))))
(svg-circle svg user-x user-y 8
:stroke-width 4
:stroke-color "white"
:fill-color (face-foreground 'telega-blue))
;; User's direction heading 1-360, 0 if unknown
(let ((heading (or (plist-get map :user-heading) 0)))
(unless (zerop heading)
(let* ((w2 user-x)
(h2 user-y)
(angle1 (* float-pi (/ (- (+ heading 200)) 180.0)))
(angle2 (* float-pi (/ (- (+ heading 160)) 180.0)))
(h-dx1 (* 100 (sin angle1)))
(h-dy1 (* 100 (cos angle1)))
(h-dx2 (* 100 (sin angle2)))
(h-dy2 (* 100 (cos angle2)))
(hclip (telega-svg-clip-path svg "headclip")))
(telega-svg-path hclip (format "M %d %d L %f %f L %f %f Z"
w2 h2 (+ w2 h-dx1) (+ h2 h-dy1)
(+ w2 h-dx2) (+ h2 h-dy2)))
(telega-svg-gradient svg "headgrad" 'radial
(list (list 0 (telega-color-name-as-hex-2digits
(face-foreground 'telega-blue))
:opacity 0.9)
;; (list 50 (telega-color-name-as-hex-2digits
;; (face-foreground 'telega-blue))
;; :opacity 0.5)
(list 100 (telega-color-name-as-hex-2digits
(face-foreground 'telega-blue))
:opacity 0.0)))
(svg-circle svg w2 h2 50
:gradient "headgrad"
:clip-path "url(#headclip)")
)))
;; Proximity Alert Radius
(let* ((alert-radius (or (plist-get map :user-alert-radius) 0))
(radius-px (unless (zerop alert-radius)
(telega-map--distance-pixels
alert-radius
(plist-get map :user-location)
(plist-get map :zoom)))))
(when radius-px
(svg-circle svg user-x user-y radius-px
:fill "none"
:stroke-dasharray "4 6"
:stroke-width 4
:stroke-opacity "0.6"
:stroke-color "black")))
(telega-svg-image svg :scale 1.0
:width width :height height
:ascent 'center
:base-uri (expand-file-name "dummy" base-dir))))
;; See
;; https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Resolution_and_Scale
(defun telega-map--distance-pixels (meters loc zoom)
"Convert METERS distance at LOC to the pixels distance at ZOOM level."
(let ((lat (plist-get loc :latitude)))
(round (/ meters
(/ (* 156543.03 (cos (degrees-to-radians lat)))
(expt 2 zoom))))))
(defun telega-map--need-new-map-photo-p (map loc)
"Return non-nil if need to fetch new map photo for new user location LOC."
(or (and (not (plist-get map :photo))
(not (plist-get map :get-map-extra)))
(not loc)
(not (plist-get map :map-location))
(let* ((map-xh (telega-chars-xheight (car telega-location-size)))
(distance
(telega-location-distance (plist-get map :map-location) loc))
(distance-px (telega-map--distance-pixels
distance loc (plist-get map :zoom))))
(> distance-px (/ map-xh 4)))))
(defun telega-map--get-thumbnail-file (map loc &optional msg)
"Request MAP image at LOC location for MSG.
Update `:svg-image' when new image is received."
(telega--getMapThumbnailFile
loc (plist-get map :zoom)
(plist-get map :width) (plist-get map :height)
(plist-get map :scale) (when msg (telega-msg-chat msg))
(lambda (map-file)
(plist-put map :map-location loc)
(plist-put map :photo map-file)
(telega-file--download map-file 32
(lambda (mfile)
(when (telega-file--downloaded-p mfile)
(let ((svg-image (plist-get map :svg-image))
(new-image (telega-map--create-image map mfile)))
(setcdr svg-image (cdr new-image))
(force-window-update)))
(when msg
(telega-msg-redisplay msg))
)))))
(defun telega-map--zoom (map step)
"Change zoom for the MAP by STEP.
Return non-nil if zoom has been changed."
(let* ((old-zoom (plist-get map :zoom))
(new-zoom (+ old-zoom step)))
(cond ((< new-zoom 13)
(setq new-zoom 13))
((> new-zoom 20)
(setq new-zoom 20)))
(plist-put map :zoom new-zoom)
(not (= old-zoom new-zoom))))
(provide 'telega-media)
;;; telega-media.el ends here