[英]Should `copy-region-as-kill` be modified to include `(setq transient-mark-mode nil)`?
When using the post-command-hook
following copy-region-as-kill
and the post-command-hook
includes a test for region-active-p
, that test returns positive because transient-mark-mode
has not yet been returned to nil
. 当使用
post-command-hook
以下copy-region-as-kill
和post-command-hook
包括用于测试region-active-p
因为测试返回正transient-mark-mode
还没有被返回到nil
。
Is the post-command-hook
designed to act upon what was in existence before this-command
was executed, or should the post-command-hook
be looking at the world as if this-command
has already run its course? post-command-hook
是设计用于执行this-command
之前存在的内容,还是post-command-hook
应该看着这个世界,好像this-command
已经运行了?
EDIT : My apologies for not specifying that I am using the latest version of Emacs Trunk. 编辑 :我很抱歉没有说明我使用的是最新版本的Emacs Trunk。 Here is the current function that performs the test:
以下是执行测试的当前函数:
(defun region-active-p ()
(and transient-mark-mode mark-active (mark)))
Here is the message from Mx emacs-version
: 以下是来自
Mx emacs-version
的消息:
GNU Emacs 24.4.50.1 (x86_64-apple-darwin10.8.0,
NS appkit-1038.36 Version 10.6.8 (Build 10K549)) of 2014-06-01 on MP.local
Here is an example of the active region that hypothetically may need to be copied using copy-region-as-kill
, and tested for while the post-command-hook
is running. 下面是一个活动区域的示例,假设可能需要使用
copy-region-as-kill
,并在post-command-hook
运行时进行测试。 [That way, the new overlays can be placed with calculations assuming there is no active region.] In the context of this example, I need the test to return nil
when this-command
equals copy-region-as-kill
and one way to accomplish that goal is to modify copy-region-as-kill
to include (setq transient-mark-mode nil)
at the tail end of the function. [那样,假设没有活动区域,新的叠加可以放在计算中。]在这个例子的上下文中,当
this-command
等于copy-region-as-kill
时,我需要测试返回nil
实现这个目标是修改copy-region-as-kill
以在函数的尾端包含(setq transient-mark-mode nil)
。 However, I hesitate to modify a staple function like copy-region-as-kill
. 但是,我犹豫是否修改了像
copy-region-as-kill
这样的主要功能。 [It wouldn't make much sense (in my opinion) to include conditions that state if region-active-p
and this-command
equals copy-region-as-kill
, then pretend the region isn't active.] [在我看来,包括条件,表明如果
region-active-p
和this-command
等于copy-region-as-kill
,那么假装该区域不活动就没有多大意义。]
(source: lawlist.com ) (来源: lawlist.com )
transient-mark-mode
has nothing to do with it. transient-mark-mode
与它无关。 Check deactivate-mark
instead. 请检查
deactivate-mark
。
To wit, you can't use region-active-p
in a post-command-hook, but instead check the value of the deactivate-mark
variable see docs . 也就是说,您不能在post-command-hook中使用
region-active-p
,而是检查deactivate-mark
变量的值,请参阅docs 。
In order to make sure there is no active region after running 为了确保在运行后没有活动区域
(deactivate-mark t)
should do the trick. 应该做的伎俩。 Why not finish the command in question with it, instead employing as a
post-command-hook
? 为什么不用它来完成有问题的命令,而不是用作
post-command-hook
?
INITIAL DRAFT (June 4, 2014): After looking at the documentation and the helpful comments and answers in this thread, I'm strongly leaning in favor of a new test specifically designed to be used inside the post-command-hook
. 初始草案 (2014年6月4日):在查看了本文中的文档和有用的注释和答案之后,我非常倾向于专门设计用于在
post-command-hook
使用的新测试。 This will avoid modifying the core / staple functions of kill-region
, copy-region-as-kill
, and yank
. 这将避免修改
kill-region
, copy-region-as-kill
和yank
的核心/主要功能。 Since the new function will be included in my own library for the minor-mode, there is no reason why I can't base some of the basic calculations on said function. 由于新函数将包含在我自己的小模式库中,因此没有理由不能对所述函数进行一些基本计算。 The function entitled
deactivate-mark
in simple.el
uses (setq mark-active nil)
and (setq transient-mark-mode nil)
, so there is no reason why I can't use them also in my own custom function. 该功能名为
deactivate-mark
在simple.el
用途(setq mark-active nil)
和(setq transient-mark-mode nil)
,所以没有理由我不能也用他们自己的自定义功能。
EDIT (June 5, 2014): Revised initial draft to merely test conditions, rather than setting either of the variables ( mark-active
or transient-mark-mode
) to nil
. 编辑 (2014年6月5日):修改初始草案仅仅测试条件,而不是将任何一个变量(
mark-active
或transient-mark-mode
)设置nil
。
(defun lawlist-region-active-p ()
"Custom test to determine whether the region is presently active; AND,
whether the region will be active when the `post-command-hook` finishes."
(cond
((memq this-command '(
self-insert-command
delete-backward-char
delete-forward-char
kill-region
delete-region
copy-region-as-kill
yank
kill-word
lawlist-copy-selected-region
lawlist-kill-word
lawlist-yank ))
nil)
((and transient-mark-mode mark-active (mark)))))
(defun test-lawlist-region-active-p ()
(cond
((lawlist-region-active-p)
(message "ACTIVE region."))
((not (lawlist-region-active-p))
(message "NOT active region."))))
(add-hook 'post-command-hook 'test-lawlist-region-active-p)
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