blocks|key|294071|text|关于Emacs如何进行缩进，有很多方面。设置制表符宽度仅指定插入文字制表符时制表符的大小。如果您不希望使用文字制表符进行缩进，则应首先禁用它们的插入(from+the+manual+)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|294072|294073|+Emacs通常使用制表符和空格来缩进行。如果你愿意，所有的缩进都可以从空格开始。要请求此操作，请将indent-tabs-mode设置为nil。这是每个缓冲区的变量，因此更改该变量仅影响当前缓冲区，但是有一个默认值，您可以将其更改为well.which，您也可以更改它。|blockquote|294074|294075|294076|但是，要指定缩进级别，还需要设置c-basic-offset+value变量：|294077|(add-hook+'html-mode-hook+
++++++'(lambda()+
++++++++(setq+c-basic-offset+4)
++++++++(setq+indent-tabs-mode+nil))|code-block|syntax|javascript|294078|在您的情况下，您可能只需要c-basic-offset，但尝试一些组合，看看哪种组合效果最好。|294079|entityMap|0|LINK|mutability|MUTABLE|url|http://www.gnu.org/software/emacs/manual/html_node/emacs/Just-Spaces.html#Just-Spaces|1|http://www.gnu.org/software/emacs/manual/html_node/ccmode/Customizing-Indentation.html^0|22|I|0|0|0|0|0|0|G|K|1|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|-4|5|6|7|16|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|17|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|18|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|19|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|1A|8|@]|9|@$A|1B|B|1C|1|1D]]|C|$]]|$1|L|3|M|5|N|7|1E|8|@]|9|@]|C|$O|P]]|$1|Q|3|R|5|6|7|1F|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]]]

Theres a number of aspects to how Emacs does indentation. Setting the tab-width only specifics how big a tab is if a literal tab is inserted. If you don't wish to use literal tabs for indentation, then you should first disable their insertion <a href="http://www.gnu.org/software/emacs/manual/html_node/emacs/Just-Spaces.html#Just-Spaces" rel="noreferrer">(from the manual
)</a>:

<blockquote>
 Emacs normally uses both tabs and
 spaces to indent lines. If you prefer,
 all indentation can be made from
 spaces only. To request this, set
 indent-tabs-mode to nil. This is a
 per-buffer variable, so altering the
 variable affects only the current
 buffer, but there is a default value
 which you can change as well.which you can change as well.
</blockquote>

However, to specify the indentation levels, you'll also need to set the <a href="http://www.gnu.org/software/emacs/manual/html_node/ccmode/Customizing-Indentation.html" rel="noreferrer">c-basic-offset value</a> variable as well:

<pre><code>(add-hook 'html-mode-hook 
 '(lambda() 
 (setq c-basic-offset 4)
 (setq indent-tabs-mode nil))
</code></pre>

In your case, you may only need the c-basic-offset but try a few combinations and see what works best.

blocks|key|293326|text|js-mode使用js-indent-level，所以把(setq+js-indent-level+4)放到你的~/.emacs中(甚至不需要放在钩子里，但是如果你想知道，它是js-mode-hook，而不是javascript-mode-hook)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|293327|如果设置tab-width不会改变特定模式的缩进级别，最简单的方法通常是打开该模式的源代码。我通过执行缩进找到了这个变量，单击链接"js.el"，然后搜索“C-h+f+js-mode”，从顶部数第二次点击。|293328|293329|但是，如果您经常与其他人协作，在文件的顶部放置一个cookie通常会更好。我通常在文件中执行//+-*-+tab-width:+8+-*-，然后在我的~/.emacs中有如下内容：|293330|(defvaralias+'c-basic-offset+'tab-width)
(defvaralias+'cperl-indent-level+'tab-width)
(defvaralias+'perl-indent-level+'tab-width)
(defvaralias+'js-indent-level+'tab-width)|code-block|syntax|javascript|293331|这样我就有更少的变量要处理了(而且不需要得到关于文件局部变量不安全的警告，或者如果模式编写器忘记声明它是安全的)|293332|entityMap^0|9|F|S|O|0|26|D|0|0|1A|N|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|11|8|@]|D|@]|E|$]]|$1|I|3|J|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|K|3|L|5|M|7|15|8|@]|D|@]|E|$N|O]]|$1|P|3|Q|5|6|7|16|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|S|$]]

js-mode uses <code>js-indent-level</code> so put <code>(setq js-indent-level 4)</code> into your ~/.emacs (shouldn't have to be in a hook, even, but if you're wondering, it's js-mode-hook, not javascript-mode-hook).

If setting tab-width doesn't change your indentation level for a certain mode, it's often simplest to just open the source for that mode. I found this variable by doing <code>C-h f js-mode</code>, clicking the link "js.el", then searching for "indent", second hit from the top.

<hr>

However, if you collaborate a lot with other people, it's often better to put a cookie at the top of the file. I typically do <code>// -*- tab-width: 8 -*-</code> in the file, and then I have stuff like this in my ~/.emacs:

<pre><code>(defvaralias 'c-basic-offset 'tab-width)
(defvaralias 'cperl-indent-level 'tab-width)
(defvaralias 'perl-indent-level 'tab-width)
(defvaralias 'js-indent-level 'tab-width)
</code></pre>

so that I have less variables to deal with (and don't have to get warnings about the file-local variable being unsafe or whatever if the mode-writer forgot to declare it as safe)

blocks|key|3015273|text|如果您使用的是ELPA的css-mode.el和emacs+23.1.1，您可以通过执行以下操作来参数化CSS文件的选项卡宽度的全局设置:+1)键入M-x+customize-variable，2)然后键入css-indent-level，3)然后根据您的喜好更改变量，然后执行"Save+for+future+sessions“。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3015274|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are using ELPA's css-mode.el with emacs 23.1.1, you can parametrize the global setting for tab width for CSS files for the tab width by doing the following:
1) Type M-x customize-variable , 
2) Then type css-indent-level, 
3) Then after you change the variable to your liking, you do "Save for future sessions".

blocks|key|296097|text|对于HTML和erb:如果您使用的是web-mode+(由Spacemacs提供的模式)，它可以像下面这样简单：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|296098|(setq-default++++web-mode-code-indent-offset+2++++web-mode-markup-indent-offset+2)|296099|其中markup-indent-offset指的是实际的标签，而code-indent-offset指的是ERB中嵌入的Ruby，等等。|296100|entityMap^0|I|8|0|0|2A|0|2|K|W|I|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|K|$]]

For HTML and erb: if you are using <code>web-mode</code> (the mode provided by Spacemacs) it can be as simple as:

<code>(setq-default
 web-mode-code-indent-offset 2
 web-mode-markup-indent-offset 2)</code>

where <code>markup-indent-offset</code> refers to the actual tags and <code>code-indent-offset</code> refers to embedded Ruby in ERB, etc.

I need to be able to set the tab settings for the following file types:

<ul>
<li>.rb: 2 soft spaces</li>
<li>.css, .html.erb: 4 space tabs</li>
</ul>

I have tried the following, but none of it seems to alter my default tab settings for each of the file types.

<pre><code>;; js-mode-hook has also been tried
(add-hook 'javascript-mode-hook 
 '(lambda() 
 (setq tab-width 4)))

(add-hook 'css-mode-hook 
 '(lambda() 
 (setq tab-width 4)))

(add-hook 'html-mode-hook 
 '(lambda() 
 (setq tab-width 8)))
</code></pre>

I am pretty new to emacs so my knowledge of configuration is pretty low.

How can I set Emacs tab settings by file type?

我需要能够设置以下文件类型的选项卡设置：.rb: 2 soft spaces.css，.html.erb: 4 space tabs我尝试了以下方法，但似乎都不会改变我对每种文件类型的默认选项卡设置。;; js-mode-hook has also been tried(add-hook 'javascript-mod...

问如何按文件类型设置Emacs选项卡设置？
EN

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问如何按文件类型设置Emacs选项卡设置？
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