branch: externals/osm
commit ad12c93f577723865a5a0135336d1ed5dbd38639
Author: Daniel Mendler <m...@daniel-mendler.de>
Commit: Daniel Mendler <m...@daniel-mendler.de>
Initial commit
---
LICENSE | 674 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
README.org | 59 ++++++
ol-osm.el | 54 +++++
osm.el | 521 +++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1308 insertions(+)
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000000..94a9ed024d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
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+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/README.org b/README.org
new file mode 100644
index 0000000000..9e66c6efde
--- /dev/null
+++ b/README.org
@@ -0,0 +1,59 @@
+#+title: osm.el - OpenStreetMap viewer for Emacs
+#+author: Daniel Mendler
+#+language: en
+#+export_file_name: osm.texi
+#+texinfo_dir_category: Emacs
+#+texinfo_dir_title: OpenStreetMap: (osm).
+#+texinfo_dir_desc: OpenStreetMap viewer for Emacs
+
+#+html: <a href="https://www.gnu.org/software/emacs/";><img alt="GNU Emacs"
src="https://github.com/minad/corfu/blob/screenshots/emacs.svg?raw=true"/></a>
+
+[[https://github.com/minad/osm/blob/screenshots/osm.png?raw=true]]
+(Map tiles © https://opentopomap.org, https://openstreetmap.org)
+
+* Features
+
+- Parallel fetching of tiles via curl
+- Scrolling in large and small steps
+- Zooming
+- Map scale indicator
+- Jump to coordinate
+- Search for location by name
+- Org link support (Example: [[osm:44,10,6][Toscana, Italia 44° 10°]])
+- Bookmarks
+
+* Commands and Key Bindings
+
+Commands:
+- =osm-new=: Open new map at home coordinates
+- =osm-search=: Search and jump to location
+- =osm-goto=: Go to coordinates
+
+Key bindings:
+- ~+~ and ~-~: Zooming
+- ~<arrow>~: Small step scrolling
+- ~C-<arrow>~, ~M-<arrow>~: Large step scrolling
+- ~g~: =osm-goto=
+- ~s~: =osm-search=
+- ~b~: =bookmark-set=
+- ~B~: =bookmark-jump=
+- ~q~: =quit-window=
+- ~c~: =clone-buffer=
+
+* Wishlist
+
+It would be nice to have overlays on top of the map, location markers, routes,
+GPS tracks, etc. Emacs does not have the ability to place different images on
+top of each other, except via SVG. Therefore this requires us to use SVG tiles
+instead of the current PNG tiles. The PNG tiles can be used as backgrounds of
+the corresponding SVG tiles. Alternatively don't use SVG tiles but render
+everything as one large SVG or off load the entire map rendering to an external
+Image Magick process. Maybe that's still efficient enough?
+
+* Related projects
+
+There have been other attempts at map viewers in Emacs before.
+
+- https://github.com/ruediger/osm-mode
+- https://github.com/svenssonjoel/Emacs-OSM
+- https://github.com/jd/google-maps.el
diff --git a/ol-osm.el b/ol-osm.el
new file mode 100644
index 0000000000..7baace2e8d
--- /dev/null
+++ b/ol-osm.el
@@ -0,0 +1,54 @@
+;;; ol-osm.el --- Org links for `osm-mode' -*- lexical-binding: t -*-
+
+;; Copyright (C) 2022 Daniel Mendler
+
+;; This file is not part of GNU Emacs.
+
+;; 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:
+
+;; Org links for `osm-mode'.
+
+;;; Code:
+
+(require 'ol)
+
+;; Only load osm on demand
+(autoload 'osm-goto "osm")
+(declare-function osm--link-data "osm")
+
+(org-link-set-parameters
+ "osm"
+ :follow #'ol-osm-open
+ :store #'ol-osm-store)
+
+(defun ol-osm-open (link _)
+ "Open osm LINK."
+ (setq link (split-string link ","))
+ (osm-goto (string-to-number (nth 0 link))
+ (string-to-number (nth 1 link))
+ (string-to-number (nth 2 link))))
+
+(defun ol-osm-store ()
+ "Store osm link."
+ (when (derived-mode-p 'osm-mode)
+ (pcase-let ((`(,lat ,lon ,zoom ,desc) (osm--link-data)))
+ (org-link-store-props
+ :type "osm"
+ :description (and desc (format "%s %.2f° %.2f°" desc lat lon))
+ :link (format "osm:%s,%s,%s" lat lon zoom)))))
+
+(provide 'ol-osm)
+;;; ol-osm.el ends here
diff --git a/osm.el b/osm.el
new file mode 100644
index 0000000000..ff552647e6
--- /dev/null
+++ b/osm.el
@@ -0,0 +1,521 @@
+;;; osm.el --- OpenStreetMap viewer -*- lexical-binding: t -*-
+
+;; Copyright (C) 2022 Daniel Mendler
+
+;; Author: Daniel Mendler <m...@daniel-mendler.de>
+;; Created: 2022
+;; License: GPL-3.0-or-later
+;; Version: 0.1
+;; Package-Requires: ((emacs "27.1"))
+;; Homepage: https://github.com/minad/osm
+
+;; This file is not part of GNU Emacs.
+
+;; 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:
+
+;; OpenStreetMap viewer
+
+;;; Code:
+
+(require 'seq)
+(eval-when-compile (require 'cl-lib))
+
+(defgroup osm nil
+ "OpenStreetMap."
+ :group 'network
+ :prefix "osm-")
+
+(defcustom osm-tile-server-list
+ '((openstreetmap-de
+ :url ("https://a.tile.openstreetmap.de/";
+ "https://b.tile.openstreetmap.de/";
+ "https://c.tile.openstreetmap.de/";)
+ :min-zoom 2 :max-zoom 19 :max-connections 2)
+ (openstreetmap-org
+ :url ("https://a.tile.openstreetmap.org/";
+ "https://b.tile.openstreetmap.org/";
+ "https://c.tile.openstreetmap.org/";)
+ :min-zoom 2 :max-zoom 19 :max-connections 2)
+ (opentopomap-org
+ :url ("https://a.tile.opentopomap.org/";
+ "https://b.tile.opentopomap.org/";
+ "https://c.tile.opentopomap.org/";)
+ :min-zoom 2 :max-zoom 17 :max-connections 2))
+ "List of tile servers."
+ :type '(alist :key-type symbol :value-type plist))
+
+(defcustom osm-large-step 256
+ "Movement step in pixel."
+ :type 'integer)
+
+(defcustom osm-small-step 16
+ "Movement step in pixel."
+ :type 'integer)
+
+(defcustom osm-tile-server 'openstreetmap-org
+ "Tile server name."
+ :type 'symbol)
+
+(defcustom osm-tile-cache (file-name-concat user-emacs-directory "var/osm/")
+ "Tile cache directory."
+ :type 'string)
+
+(defconst osm--placeholder1
+ `(image :type xbm :width 256 :height 256 :background nil
+ :data ,(make-bool-vector (* 256 256) nil)))
+(defconst osm--placeholder2 (copy-sequence osm--placeholder1))
+
+(defvar osm--search-history nil)
+
+(defvar-local osm--url-index 0)
+(defvar-local osm--queue nil)
+(defvar-local osm--active nil)
+(defvar-local osm--width 0)
+(defvar-local osm--height 0)
+(defvar-local osm--zoom nil)
+(defvar-local osm--x nil)
+(defvar-local osm--y nil)
+
+(defun osm--bb-to-zoom (lat1 lat2 lon1 lon2)
+ "Compute zoom level from boundingbox LAT1 to LAT2 and LON1 to LON2."
+ (let ((w (/ (frame-pixel-width) 256))
+ (h (/ (frame-pixel-height) 256)))
+ (max (osm--server-property :min-zoom)
+ (min
+ (osm--server-property :max-zoom)
+ (min (logb (/ w (abs (- (osm--lon-to-x lon1) (osm--lon-to-x lon2)))))
+ (logb (/ h (abs (- (osm--lat-to-y lat1) (osm--lat-to-y
lat2))))))))))
+
+(defun osm--lon-to-x (lon)
+ "Convert LON to x coordinate (unscaled)."
+ (/ (+ lon 180.0) 360.0))
+
+(defun osm--lat-to-y (lat)
+ "Convert LAT to y coordiate (unscaled)."
+ (setq lat (* lat (/ float-pi 180.0)))
+ (- 0.5 (/ (log (+ (tan lat) (/ 1 (cos lat)))) float-pi 2)))
+
+(defun osm--set-lat-lon (lat lon)
+ "Set longitude LON and latitude LAT."
+ (let ((n (* 256 (expt 2.0 osm--zoom))))
+ (setq osm--x (floor (* n (osm--lon-to-x lon)))
+ osm--y (floor (* n (osm--lat-to-y lat))))))
+
+(defun osm--lon ()
+ "Return longitude in degrees."
+ (- (/ (* osm--x 360.0) 256.0 (expt 2.0 osm--zoom)) 180.0))
+
+(defun osm--lat ()
+ "Return latitude in degrees."
+ (let ((y (* float-pi (- 1 (* 2 (/ osm--y 256.0 (expt 2.0 osm--zoom)))))))
+ (/ (* 180 (atan (/ (- (exp y) (exp (- y))) 2))) float-pi)))
+
+(defun osm--server-property (prop)
+ "Return server property PROP."
+ (plist-get (alist-get osm-tile-server osm-tile-server-list) prop))
+
+(defun osm--tile-url (x y zoom)
+ "Return tile url for coordinate X, Y and ZOOM."
+ (let ((url (osm--server-property :url)))
+ (prog1
+ (format "%s%d/%d/%d.png"
+ (nth osm--url-index url)
+ zoom x y)
+ (setq osm--url-index
+ (mod (1+ osm--url-index)
+ (length url))))))
+
+(defun osm--tile-file (x y zoom)
+ "Return tile file name for coordinate X, Y and ZOOM."
+ (format "%s%d-%d-%d.png" (osm--tile-cache) zoom x y))
+
+(defun osm--tile-cache ()
+ "Return tile cache directory."
+ (expand-file-name
+ (file-name-concat osm-tile-cache
+ (symbol-name osm-tile-server)
+ "/")))
+
+(defun osm--enqueue (x y)
+ "Enqueue tile X/Y for download."
+ (let ((job `(,x ,y . ,osm--zoom)))
+ (unless (member job osm--queue)
+ (setq osm--queue (nconc osm--queue (list job))))))
+
+(defun osm--download ()
+ "Download next tile in queue."
+ (pcase (and (< (length osm--active)
+ (* (length (osm--server-property :url))
+ (osm--server-property :max-connections)))
+ (pop osm--queue))
+ (`(,x ,y . ,zoom)
+ (let ((buffer (current-buffer)))
+ (push
+ (make-process
+ :name (format "osm %s %s %s" x y zoom)
+ :connection-type 'pipe
+ :noquery t
+ :command
+ (list "curl" "-s" "-o"
+ (osm--tile-file x y zoom)
+ (osm--tile-url x y zoom))
+ :filter #'ignore
+ :sentinel
+ (lambda (proc status)
+ (when (buffer-live-p buffer)
+ (with-current-buffer buffer
+ (setq osm--active (delq proc osm--active))
+ (when (and (string-match-p "finished" status)
+ (eq osm--zoom zoom))
+ (osm--put x y))
+ (force-mode-line-update)
+ (osm--download)))))
+ osm--active)
+ (osm--download)))))
+
+(defun osm-larger (&optional n)
+ "Zoom N times into the map."
+ (interactive "p")
+ (setq n (or n 1))
+ (while (> n 0)
+ (when (< osm--zoom (osm--server-property :max-zoom))
+ (setq osm--zoom (1+ osm--zoom)
+ osm--x (* osm--x 2)
+ osm--y (* osm--y 2)))
+ (cl-decf n))
+ (while (< n 0)
+ (when (> osm--zoom (osm--server-property :min-zoom))
+ (setq osm--zoom (1- osm--zoom)
+ osm--x (/ osm--x 2)
+ osm--y (/ osm--y 2)))
+ (cl-incf n))
+ (osm--update))
+
+(defun osm-smaller (&optional n)
+ "Zoom N times out of the map."
+ (interactive "p")
+ (osm-larger (- (or n 1))))
+
+(defun osm--move (dx dy step)
+ "Move by DX/DY with STEP size."
+ (setq
+ osm--x (min (* 256 (1- (expt 2 osm--zoom)))
+ (max 0 (+ osm--x (* dx step))))
+ osm--y (min (* 256 (1- (expt 2 osm--zoom)))
+ (max 0 (+ osm--y (* dy step)))))
+ (osm--update))
+
+(defun osm-right (&optional n)
+ "Move N small stepz to the right."
+ (interactive "p")
+ (osm--move (or n 1) 0 osm-small-step))
+
+(defun osm-down (&optional n)
+ "Move N small stepz down."
+ (interactive "p")
+ (osm--move 0 (or n 1) osm-small-step))
+
+(defun osm-up (&optional n)
+ "Move N small stepz up."
+ (interactive "p")
+ (osm-down (- (or n 1))))
+
+(defun osm-left (&optional n)
+ "Move N small stepz to the left."
+ (interactive "p")
+ (osm-right (- (or n 1))))
+
+(defun osm-right-large (&optional n)
+ "Move N large stepz to the right."
+ (interactive "p")
+ (osm--move (or n 1) 0 osm-large-step))
+
+(defun osm-down-large (&optional n)
+ "Move N large stepz down."
+ (interactive "p")
+ (osm--move 0 (or n 1) osm-large-step))
+
+(defun osm-up-large (&optional n)
+ "Move N large stepz up."
+ (interactive "p")
+ (osm-down-large (- (or n 1))))
+
+(defun osm-left-large (&optional n)
+ "Move N large stepz to the left."
+ (interactive "p")
+ (osm-right-large (- (or n 1))))
+
+(defvar osm-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map "+" #'osm-larger)
+ (define-key map "-" #'osm-smaller)
+ (define-key map [up] #'osm-up)
+ (define-key map [down] #'osm-down)
+ (define-key map [left] #'osm-left)
+ (define-key map [right] #'osm-right)
+ (define-key map [C-up] #'osm-up-large)
+ (define-key map [C-down] #'osm-down-large)
+ (define-key map [C-left] #'osm-left-large)
+ (define-key map [C-right] #'osm-right-large)
+ (define-key map [M-up] #'osm-up-large)
+ (define-key map [M-down] #'osm-down-large)
+ (define-key map [M-left] #'osm-left-large)
+ (define-key map [M-right] #'osm-right-large)
+ (define-key map "c" #'clone-buffer)
+ (define-key map "g" #'osm-goto)
+ (define-key map "s" #'osm-search)
+ (define-key map "b" #'bookmark-set)
+ (define-key map "B" #'bookmark-jump)
+ (define-key map [remap scroll-down-command] #'osm-down)
+ (define-key map [remap scroll-up-command] #'osm-up)
+ (define-key map "\d" nil)
+ (define-key map (kbd "S-SPC") nil)
+ (define-key map " " nil)
+ (define-key map "<" nil)
+ (define-key map ">" nil)
+ map)
+ "Keymap used by `osm-mode'.")
+
+(define-derived-mode osm-mode special-mode "Osm"
+ "Open Street Map mode."
+ :interactive nil
+ (let ((cache (osm--tile-cache)))
+ (unless (file-exists-p cache)
+ (make-directory cache t))
+ (run-with-idle-timer
+ 30 nil
+ (lambda ()
+ (dolist (file (directory-files cache 'full "\\.png\\'" 'nosort))
+ (when (> (float-time
+ (time-since
+ (file-attribute-modification-time
+ (file-attributes file))))
+ (* 60 60 24 7))
+ (delete-file file))))))
+ (setq-local line-spacing nil
+ cursor-type nil
+ left-fringe-width 1
+ right-fringe-width 1
+ left-margin-width 0
+ right-margin-width 0
+ truncate-lines t
+ buffer-read-only t
+ revert-buffer-function #'osm--update
+ bookmark-make-record-function #'osm--make-bookmark
+ fringe-indicator-alist '((truncation . nil)))
+ (add-hook 'window-size-change-functions #'osm--update nil 'local))
+
+(defun osm--put (x y &optional image)
+ "Put tile IMAGE at X/Y."
+ (let* ((i (+ x (- (/ osm--x 256)) (/ (1- osm--width) 2)))
+ (j (+ y (- (/ osm--y 256)) (/ (1- osm--height) 2)))
+ (mx (if (= 0 i) (mod osm--x 256) 0))
+ (my (if (= 0 j) (mod osm--y 256) 0))
+ (pos (+ (point-min) (* j (1+ osm--width)) i)))
+ (when (and (>= i 0) (< i osm--width)
+ (>= j 0) (< j osm--height))
+ (setq image (or image `(image :type png :file ,(osm--tile-file x y
osm--zoom)
+ :width 256 :height 256)))
+ (with-silent-modifications
+ (put-text-property
+ pos (1+ pos) 'display
+ (if (or (/= 0 mx) (/= 0 my))
+ `((slice ,mx ,my ,(- 256 mx) ,(- 256 my)) ,image)
+ image))))))
+
+;;;###autoload
+(defun osm-new (&optional unique)
+ "New OSM buffer, optionally UNIQUE."
+ (interactive "P")
+ (let ((lat (bound-and-true-p calendar-latitude))
+ (lon (bound-and-true-p calendar-longitude))
+ (zoom 11))
+ (unless (and lat lon)
+ (setq lat 0 lon 0 zoom 2))
+ (osm-goto lat lon zoom nil unique)))
+
+(defun osm--queue-info ()
+ "Return queue info string."
+ (let ((n (length osm--queue)))
+ (when (> n 0)
+ (format "(%s/%s)" (length osm--active) n))))
+
+(defun osm--update (&rest _)
+ "Update map display."
+ (unless (derived-mode-p #'osm-mode)
+ (error "Not an osm-mode buffer"))
+ (with-silent-modifications
+ (let* ((default-directory (osm--tile-cache))
+ (size (expt 2 osm--zoom))
+ (meter-per-pixel (/ (* 156543.03 (cos (/ (osm--lat) (/ 180.0
float-pi)))) size))
+ (meter '(1 5 10 50 100 500 1000 5000 10000 50000 100000 500000
1000000 5000000 10000000))
+ (idx 0))
+ (while (and (< idx (1- (length meter))) (< (/ (nth (1+ idx) meter)
meter-per-pixel) 100))
+ (cl-incf idx))
+ (setq meter (nth idx meter))
+ (setq-local
+ header-line-format
+ (list
+ (format " OpenStreetMap %s %s Z%-2d %s%s%s %s %s "
+ (format #("%7.2f°" 0 5 (face bold)) (osm--lat))
+ (format #("%7.2f°" 0 5 (face bold)) (osm--lon))
+ osm--zoom
+ (propertize " " 'face '(:inverse-video t)
+ 'display '(space :width (3)))
+ (propertize " " 'face '(:strike-through t)
+ 'display `(space :width (,(floor (/ meter
meter-per-pixel)))))
+ (propertize " " 'face '(:inverse-video t)
+ 'display '(space :width (3)))
+ (if (>= meter 1000) (/ meter 1000) meter)
+ (if (>= meter 1000) "km" "m"))
+ '(:eval (osm--queue-info))))
+ (setq osm--height (1+ (ceiling (window-pixel-height) 256))
+ osm--width (1+ (ceiling (window-pixel-width) 256)))
+ (plist-put (cdr osm--placeholder1) :background (face-attribute 'default
:background))
+ (plist-put (cdr osm--placeholder2) :background (face-attribute 'default
:background))
+ (erase-buffer)
+ (dotimes (_j osm--height)
+ (insert (concat (make-string osm--width ?\s) "\n")))
+ (goto-char (point-min))
+ (dotimes (j osm--height)
+ (dotimes (i osm--width)
+ (let ((x (+ i (/ osm--x 256) (- (/ (1- osm--width) 2))))
+ (y (+ j (/ osm--y 256) (- (/ (1- osm--height) 2))))
+ (placeholder (if (= 0 (mod i 2)) osm--placeholder1
osm--placeholder2)))
+ (if (and (>= x 0) (>= y 0) (< x size) (< y size))
+ (if (file-exists-p (osm--tile-file x y osm--zoom))
+ (osm--put x y)
+ (osm--put x y placeholder)
+ (osm--enqueue x y))
+ (osm--put x y placeholder)))))
+ (setq osm--queue
+ (seq-sort-by
+ (pcase-lambda (`(,x ,y . ,_z))
+ (setq x (- x (/ osm--x 256))
+ y (- y (/ osm--y 256)))
+ (+ (* x x) (* y y)))
+ #'< osm--queue))
+ (osm--download))))
+
+(declare-function bookmark-make-record-default "boomark")
+(defun osm--make-bookmark ()
+ "Make OSM bookmark."
+ `(,(osm--bookmark-name)
+ ,@(bookmark-make-record-default t)
+ (lon . ,(osm--lon))
+ (lat . ,(osm--lat))
+ (zoom . ,osm--zoom)
+ (name . ,(buffer-name))
+ (handler . ,#'osm-bookmark-jump)))
+
+(defun osm-goto (lat lon zoom &optional name unique)
+ "Goto LAT/LON/ZOOM in buffer NAME.
+The buffer is optionally assigned a UNIQUE name."
+ (interactive
+ (pcase-let ((`(,lat ,lon ,zoom) (mapcar #'string-to-number (split-string
(read-string "Lat Lon (Zoom): ") nil t))))
+ (setq zoom (or zoom 11))
+ (unless (and (numberp lat) (numberp lon) (numberp zoom))
+ (error "Invalid coordindate"))
+ (list lat lon zoom)))
+ (with-current-buffer
+ (cond
+ ((and (not name) (not unique) (derived-mode-p #'osm-mode))
(current-buffer))
+ (unique (generate-new-buffer (or name "*osm*")))
+ (t (get-buffer-create (or name "*osm*"))))
+ (unless (derived-mode-p #'osm-mode)
+ (osm-mode))
+ (setq osm--zoom zoom)
+ (osm--set-lat-lon lat lon)
+ (if (get-buffer-window)
+ (osm--update)
+ (pop-to-buffer (current-buffer)))))
+
+;;;###autoload
+(defun osm-bookmark-jump (bm)
+ "Jump to OSM bookmark BM."
+ (osm-goto
+ (alist-get 'lat bm)
+ (alist-get 'lon bm)
+ (alist-get 'zoom bm)
+ (and (not (derived-mode-p #'osm-mode))
+ (alist-get 'name bm))))
+
+(defun osm--bookmark-name ()
+ "Return bookmark name for current map."
+ (format "OSM: %s%.2f° %.2f°"
+ (concat (osm--description) " ")
+ (osm--lat)
+ (osm--lon)))
+
+(defun osm--link-data ()
+ "Return link data."
+ (list (osm--lat) (osm--lon) osm--zoom (osm--description)))
+
+(defun osm--description ()
+ "Return descriptive string for current map."
+ (alist-get
+ 'display_name
+ (json-parse-string
+ (shell-command-to-string
+ (concat
+ "curl -s "
+ (shell-quote-argument
+ (format
"https://nominatim.openstreetmap.org/reverse?format=json&zoom=%s&lon=%s&lat=%s";
+ (min 18 (max 3 osm--zoom)) (osm--lon) (osm--lat)))))
+ :array-type 'list
+ :object-type 'alist)))
+
+;;;###autoload
+(defun osm-search ()
+ "Search for location and display the map."
+ (interactive)
+ ;; TODO add search bounded to current viewbox, bounded=1, viewbox=x1,y1,x2,y2
+ (let* ((search (completing-read
+ "Location: " osm--search-history nil nil nil
'osm--search-history))
+ (json (json-parse-string
+ (shell-command-to-string
+ (concat "curl -s "
+ (shell-quote-argument
+ (concat
"https://nominatim.openstreetmap.org/search?format=json&q=";
+ (url-encode-url search)))))
+ :array-type 'list
+ :object-type 'alist))
+ (results (mapcar
+ (lambda (x)
+ `(,(format "%s (%s° %s°)"
+ (alist-get 'display_name x)
+ (alist-get 'lat x)
+ (alist-get 'lon x))
+ ,(string-to-number (alist-get 'lat x))
+ ,(string-to-number (alist-get 'lon x))
+ ,@(mapcar #'string-to-number (alist-get 'boundingbox
x))))
+ (or json (error "No results"))))
+ (selected (or (cdr (assoc
+ (completing-read
+ (format "Matches for '%s': " search)
+ results nil t nil t)
+ results))
+ (error "No selection"))))
+ (osm-goto (car selected) (cadr selected)
+ (apply #'osm--bb-to-zoom (cddr selected)))))
+
+(dolist (sym (list #'osm-up #'osm-down #'osm-left #'osm-right
+ #'osm-up-large #'osm-down-large #'osm-left-large
#'osm-right-large
+ #'osm-smaller #'osm-larger))
+ (put sym 'command-modes '(osm-mode)))
+
+(provide 'osm)
+;;; osm.el ends here
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