我在doc-view缓冲区中显示了一个文档。但是,文档向左旋转90度。我可以在emacs doc-view中旋转文档吗?
答案 0 :(得分:11)
我也有这个要求。遗憾的是, doc-view 不提供此功能。
emacs使用的图像代码也无法旋转图像。所以我创建了一个函数,利用ImageMagick转换存储在缓存目录中的png文件,并重新显示当前页面:
(defun doc-view-rotate-current-page ()
"Rotate the current page by 90 degrees. Requires ImageMagick installation"
(interactive)
(when (eq major-mode 'doc-view-mode)
;; we are assuming current doc-view internals about cache-names
(let ((file-name (expand-file-name (format "page-%d.png" (doc-view-current-page)) (doc-view--current-cache-dir))))
;; assume imagemagick is installed and rotate file in-place and redisplay buffer
(call-process-shell-command "convert" nil nil nil "-rotate" "90" (concat "\"" file-name "\"") (concat "\"" file-name "\""))
(clear-image-cache)
(doc-view-goto-page (doc-view-current-page))))))