elisp

问题 If I use konsole or other terminal, the terminal tag name can change based on PWD. But in multi-term, the buffer name is *terminal<number>* . This is not very nice. Because when I switch between them, the name is not very informative. So I want to rename it based on PWD. I find that the Enter key is bind to term-send-raw, so I write a function (defadvice term-send-raw (around rename-term-name activate) (progn (rename-buffer (concat "⇒ " (shell-command-to-string "pwd | xargs basename | tr -d '

问题 I want to ask a second question to the user depending on the answer to the first one. (defun something (a b) (interactive (list (read-number "First num: ") (read-number "Second num: "))) (message "a is %s and b is %s" a b)) So I need a way to test the entry values : (defun something-else (a &optional b) (interactive (list (read-number "First num: ") (if (< a 2) (read-number "Second num: ")))) (message "a is %s" a)) But if: Symbol's value as variable is void: a Question : How can I use

问题 I have not seen a really good example on the web. How can I add authentication to a request like this: (defun login-show-posts () (interactive) (let ((url-request-method "GET") (url-request-extra-headers '(("Content-Type" . "application/xml")))) (url-retrieve "http://localhost:3000/essay/1.xml" (lambda (status) (switch-to-buffer (current-buffer)) )))) if for example, the user and pass is admin:admin? 回答1: I got the impression that url.el was designed mostly for interactive operations, i.e.

问题 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

问题 (defun foo () (send-to-debug-log "Error. Function terminated." (get-current-function-name))) I currently do this: (defun foo () (send-to-debug-log "Error. Function terminated." 'foo))) Hard coding the function name seems not to be a good practice. Any suggestion to implement the get-current-function-name or get-function-name-that-call-me . 回答1: (defun foo () (send-to-debug-log "Error. Function terminated." (nth 1 (backtrace-frame 2)))) 回答2: With the package which-function-mode (in melpa), you

问题 I'm trying to redefine the keys used to navigate the history when inside several commands accepting regexps and offering C-p / C-n history navigation. I'd like to use other keys, in addition to C-p / C-n. For example when using occur or replace-regexp , C-p and C-n can be used to go to previous and next elements. I've tried several things but can't make it work. I think I'm missing the "big picture" here. Which mode-map do I need to modify, when and how? Everything I tried failed. P.S: Note

问题 I call git get the toplevel dir (according to Is there a way to get the git root directory in one command? ). (let ((tmpbuffer (get-buffer-create (make-temp-name "git")))) (call-process "git" nil tmpbuffer nil "rev-parse" "--show-toplevel") (with-current-buffer tmpbuffer (with-output-to-string (princ (buffer-string)) (kill-buffer)))) But there's a trailing newline in the string returned. I'm not sure how to get rid of it. 回答1: I think you can do (replace-regexp-in-string "\n$" "" (shell

问题 I am making the jump to EMACS, and I can't find what I need to do in my .emacs file to get php-mode AND all other modes to insert 4 spaces instead of a TAB. Help? UPDATE: When I hit tab I still get 8 spaces in a plain file with the given answers. In php-mode I still get 2 spaces. Hitting tab in php mode does nothing, tab in regular EMACS adds 8 spaces. UPDATE2: This is what I have in my .emacs : (require 'color-theme) (color-theme-calm-forest) (setq-default indent-tabs-mode nil) (setq-default

问题 Question: How could I find out the M-x equivalent commands for doing GUI-based operations in Emacs, in those cases where my Emacs-variant uses OS-specific desktop functionality? Background: Conventional understanding states that everything in Emacs is a command, and that commands can be invoked via M-x, as long as you know the name of the command. Assuming this statement is correct, what is the way to find the name of the commands used to trigger the "GUI-style" menus in a "desktop" based

问题 Emacs reindents the current line whenever I type certain things, like ";" or "//". This is pretty annoying, since there are a whole lot of places where it isn't smart enough to indent correctly. How do I disable this feature? I still want to be able to indent the line with TAB, but I don't want any source code I type to cause it to reindent. (I'm using Dylan Moonfire's C# mode, but this probably applies to any cc-mode.) 回答1: Try running c-toggle-electric-state to turn off the electric action