在Emacs函数中格式化一个标题以将缓冲区打印到PDF文件中 [英] Formatting a header in an Emacs function to print a buffer to PDF w/ line wrapping
问题描述
ps-print *
函数)。 问题是这个函数是为了实现这个换行,必须要复制当前的缓冲区。这有效地打破了 ps-print-buffer-with-faces
在生成的PDF文件中的每个页面顶部显示正确的标题的能力。
作为他解决方案的一部分,Rupert Swarbrick写了一个保留这个信息的函数。然而,最终的标题总是 HeaderLinesLeft
谁可以发现错误?
(defun harden-newlines()
(interactive)
使缓冲区中的所有换行符变得更加
(save-excursion
(goto-char(point-min))
(while(search-forward\\\
nil t)
(backward-char)
(put-text-property点)(1+(点))'hard t)
(forward-char))))
(defun spool-buffer-given-name(name)
加载ps-print)
(let((tmp ps-left-header))
(展开保护
(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()
将当前文件打印到/tmp/print.pdf
(interactive)
(let((wbuf (generate-new-buffer* Wrapped *))
(sbuf(current-buffe )
(jit-lock-fontify-now)
(save-current-buffer
(set-buffer wbuf)
(insert-buffer sbuf)
(setq fill-column 95)
(longlines-mode t)
(harden-newlines)
(message(buffer-name sbuf))
(spool-buffer-given -name(buffer-name sbuf))
(kill-buffer wbuf)
(switch-to-buffer* PostScript *)
(写入文件/tmp/print.ps )
(kill-buffer(current-buffer)))
(call-processps2pdf14nil nil
/tmp/print.ps/tmp/print.pdf )
(删除文件/tmp/print.ps)
(消息PDF保存到/tmp/print.pdf))
尝试这样:
code>(defun spool-buffer-given-name(name)
(let((ps-left-header(list(格式(%s)name))))
ps-spool-buffer-with-faces)))
查看变量ps-left-header的文档,这是w帽子让我了解到上述。
这是一个整洁的能力;我一定会使用它而不是ps-print。使它更像C-u M-x ps-print-buffer-with-faces这样做会很好两个缺少的功能是标题中的目录名称,并提示用户输入文件名。既不太难。
Rupert Swarbrick came up with the following three functions to print an Emacs buffer to pdf in which lines are wrapped (this is not normally the case when using ps-print*
functions).
The problem is this function is that to achieve this line wrapping, a copy of the current buffer has to be made. This effectively breaks the capability of ps-print-buffer-with-faces
to display a correct header on top of each page in the resulting PDF file.
As part of his solution, Rupert Swarbrick wrote a function that preserves this information. The resulting header, however, is always HeaderLinesLeft
Who can spot the mistake?
(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)
(setq fill-column 95)
(longlines-mode t)
(harden-newlines)
(message (buffer-name sbuf))
(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")))
Try this:
(defun spool-buffer-given-name (name)
(let ((ps-left-header (list (format "(%s)" name))))
(ps-spool-buffer-with-faces)))
See documentation for variable ps-left-header, which is what clued me in to the above.
This is a neat capability; I'll definitely use it instead of ps-print. It would be good to make it act more like C-u M-x ps-print-buffer-with-faces; two missing features are directory name in the header, and prompting the user for a filename. Neither is too difficult.
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