在emacs中使用google map api?!

当别人告诉你emacs 能做什么什么的时候，要淡定，这是emacsen固有的zhuangbility行为。

 

所以当区区在slashdot上看到google-maps-el 时，作为programmer，想到的只是仔细考察一下其实现过程：

It fully implements the Google Static Maps API and the Google Maps Geocoding API .

 

大约花了一下午，掌握了这两个api的使用之后，我改写了其中的一些函数：

;;;###autoload (defun jr-google-maps-geocode-location (location) (let* ((req (google-maps-geocode-request :address location)) (status (google-maps-geocode-request->status req))) (unless (eq status 'ok) (error (format "Unable to geocode %s: %s" location status))) (setq location (list (assoc 'formatted_address (google-maps-geocode-results->one-result (google-maps-geocode-request->results req))) (assoc 'location (cdr (assoc 'geometry (google-maps-geocode-results->one-result (google-maps-geocode-request->results req))))))))) ;;;###autoload (defun jr-google-maps (location &optional no-geocoding) "Run Google Maps on LOCATION. If NO-GEOCODING is t, then does not try to geocode the address and do not ask the user for a more precise location." (interactive (list (if (use-region-p) (buffer-substring-no-properties (region-beginning) (region-end)) (read-string "Location: ")))) (let* ((location (if no-geocoding location (jr-google-maps-geocode-location location))) (lat (cdr (assoc 'lat (assoc 'location location)))) (lng (cdr (assoc 'lng (assoc 'location location)))) ) (google-maps-static-show :markers `(((,(cdr (assoc 'formatted_address location))))) :zoom 14 :center (format "%f,%f" lat lng ) :lat lat :lng lng :format 'jpg))) (defun google-maps-static-up () "Move a Google map up." (interactive) (unless (and (plist-member google-maps-static-params :lat) (plist-member google-maps-static-params :lng) ) (error "No Current Lat&Lng")) (let* ((plist google-maps-static-params) (lat (plist-get plist :lat)) (lng (plist-get plist :lng)) (lvl (plist-get plist :zoom)) (new-lat (+ lat (offset-of-level lvl))) (new-center (format "%f,%f" new-lat lng ))) (plist-put plist :lat new-lat) (plist-put plist :center new-center) (apply 'google-maps-static-show plist)))

通过这两个变更，就在emacs可以支持方向键移动交互查看google map了，当然，由于基于static api，速度不是非常理想。不过通过这个实验，可以体验到很多google api和emacs编程。

 

优快云的博客完全放elisp代码很不方便，如果有朋友对这个带方向移动交互的代码patch感兴趣，可以留言联系，或者自己研究一下（more fun）。下面是一张运行效果图:

 

国人也有高手跟进了，并且提供了中文资料 。

 

另外说一下的是，google-maps-el的作者真是个高手啊，他的rainbow-mode和awesome X管理器非常好用，猛击 了解吧。