emacs - Emacs 打印缓冲区的自动换行到 PDF

Question

我使用此功能将缓冲区的内容打印为 PDF

(来自我的 .emacs 文件:)

(defun print-to-pdf ()
  (interactive)
  (ps-spool-buffer-with-faces)
  (switch-to-buffer "*PostScript*")
  (write-file "/tmp/tmp.ps")
  (kill-buffer "tmp.ps")
  (setq cmd (concat "ps2pdf14 /tmp/tmp.ps /home/user/" (buffer-name) ".pdf"))
  (shell-command cmd)
  (shell-command "rm /tmp/tmp.ps")
  (message (concat "Saved to:  /home/user/" (buffer-name) ".pdf"))  
  )

但是，我无法找到一种方法在 PostScript 缓冲区被写入磁盘之前启用或应用可视线次要模式，以便在输出中启用自动换行。

Answer 1

获得视觉线模式的问题在于它插入了“软换行符”(被 PS 渲染器忽略)。一个解决方案是用硬换行符替换这些。我认为下面的代码可以满足您的需求。请注意，我们在临时缓冲区中调用 harden-newlines 以免弄乱当前文档。此外，我已将输出目的地更改为始终位于 /tmp/print.pdf .似乎...覆盖您的 /home 中的文档是不明智的。没有任何警告!之后您可以随时移动 PDF。

无论如何，给你。这是你想要的吗？

(defun harden-newlines ()
  (interactive)
  "Make all the newlines in the buffer hard."
  (save-excursion
    (goto-char (point-min))
    (while (search-forward "\n" nil t)
      (backward-char)
      (put-text-property (point) (1+ (point)) 'hard t)
      (forward-char))))

(defun spool-buffer-given-name (name)
  (load "ps-print")
  (let ((tmp ps-left-header))
    (unwind-protect
        (progn
          (setq ps-left-header
                (list (lambda () name) 'ps-header-dirpart))
          (ps-spool-buffer-with-faces))
      (setf ps-left-header tmp))))

(defun print-to-pdf ()
  "Print the current file to /tmp/print.pdf"
  (interactive)
  (let ((wbuf (generate-new-buffer "*Wrapped*"))
        (sbuf (current-buffer)))
    (jit-lock-fontify-now)
    (save-current-buffer
      (set-buffer wbuf)
      (insert-buffer sbuf)
      (longlines-mode t)
      (harden-newlines)
      (spool-buffer-given-name (buffer-name sbuf))
      (kill-buffer wbuf)
      (switch-to-buffer "*PostScript*")
      (write-file "/tmp/print.ps")
      (kill-buffer (current-buffer)))
    (call-process "ps2pdf14" nil nil nil
                  "/tmp/print.ps" "/tmp/print.pdf")
    (delete-file "/tmp/print.ps")
    (message "PDF saved to /tmp/print.pdf")))