branch: master commit e46d9c74109c73f54214afffb231fa7d36984dbc Author: Noam Postavsky <npost...@users.sourceforge.net> Commit: Noam Postavsky <npost...@users.sourceforge.net>
link to docstring ref; fix other links, formatting --- doc/snippet-expansion.org | 145 +++++++++++---------------------------------- 1 files changed, 35 insertions(+), 110 deletions(-) diff --git a/doc/snippet-expansion.org b/doc/snippet-expansion.org index af0fe21..e4fd4a4 100644 --- a/doc/snippet-expansion.org +++ b/doc/snippet-expansion.org @@ -11,7 +11,7 @@ You can use YASnippet to expand snippets in different ways: - - When =yas-minor-mode= is active: + - When [[sym:yas-minor-mode][=yas-minor-mode=]] is active: - Type the snippet's *trigger key* then calling [[sym:yas-expand][=yas-expand=]] (bound to =TAB= by default). @@ -31,10 +31,10 @@ *** Trigger key -=yas-expand= tries to expand a /snippet abbrev/ (also known as +[[sym:yas-expand][=yas-expand=]] tries to expand a /snippet abbrev/ (also known as /snippet key/) before point. -When =yas-minor-mode= is enabled, it binds [[sym:yas-expand][=yas-expand=]] to =TAB= and +When [[sym:yas-minor-mode][=yas-minor-mode=]] is enabled, it binds [[sym:yas-expand][=yas-expand=]] to =TAB= and =<tab>= by default, however, you can freely set it to some other key: #+begin_src emacs-lisp :exports code @@ -46,26 +46,26 @@ When =yas-minor-mode= is enabled, it binds [[sym:yas-expand][=yas-expand=]] to = [[./images/minor-mode-indicator.png]] To enable the YASnippet minor mode in all buffers globally use the -command =yas-global-mode=. +command [[sym:yas-global-mode][=yas-global-mode=]]. -When you use =yas-global-mode= you can also selectively disable +When you use [[sym:yas-global-mode][=yas-global-mode=]] you can also selectively disable YASnippet in some buffers by setting the buffer-local variable -=yas-dont-active= in the buffer's mode hook. +[[sym:yas-dont-active][=yas-dont-active=]] in the buffer's mode hook. **** Fallback bahaviour -=yas-fallback-behaviour= is a customization variable bound to -='call-other-command= by default. If =yas-expand= failed to find any +[[sym:yas-fallback-behaviour][=yas-fallback-behaviour=]] is a customization variable bound to +'=call-other-command= by default. If [[sym:yas-expand][=yas-expand=]] failed to find any suitable snippet to expand, it will disable the minor mode temporarily -and find if there's any other command bound the =yas-trigger-key=. +and find if there's any other command bound the [[sym:yas-trigger-key][=yas-trigger-key=]]. If found, the command will be called. Usually this works very well --when there's a snippet, expand it, otherwise, call whatever command originally bind to the trigger key. However, you can change this behavior by customizing the -=yas-fallback-behavior= variable. If you set this variable to -='return-nil=, it will return =nil= instead of trying to call the +[[sym:yas-fallback-behavior][=yas-fallback-behavior=]] variable. If you set this variable to +'=return-nil=, it will return =nil= instead of trying to call the /original/ command when no snippet is found. *** Insert at point @@ -80,34 +80,34 @@ according to the condition system. If you want to see all applicable snippets for the major mode, prefix this command with =C-u=. The prompting methods used are again controlled by -=yas-prompt-functions=. +[[sym:yas-prompt-functions][=yas-prompt-functions=]]. *** Snippet keybinding See the section of the =# binding:= directive in -[[snippet-development.html][Writing Snippets]]. +[[./snippet-development.org][Writing Snippets]]. *** Expanding from the menu -See [[snippet-menu.html][the YASnippet Menu]]. +See [[./snippet-menu.org][the YASnippet Menu]]. *** Expanding with =hippie-expand= -To integrate with =hippie-expand=, just put =yas-hippie-try-expand= in +To integrate with =hippie-expand=, just put [[sym:yas-hippie-try-expand][=yas-hippie-try-expand=]] in =hippie-expand-try-functions-list=. This probably makes more sense when placed at the top of the list, but it can be put anywhere you prefer. *** Expanding from emacs-lisp code Sometimes you might want to expand a snippet directly from you own elisp -code. You should call =yas-expand-snippet= instead of =yas-expand= in +code. You should call [[sym:yas-expand-snippet][=yas-expand-snippet=]] instead of [[sym:yas-expand][=yas-expand=]] in this case. As with expanding from the menubar, the condition system and multiple candidates doesn't affect expansion. In fact, expanding from the YASnippet menu has the same effect of evaluating the follow code: -See the internal documentation on =yas-expand-snippet= for more +See the internal documentation on [[sym:yas-expand-snippet][=yas-expand-snippet=]] for more information. ** Controlling expansion @@ -122,7 +122,7 @@ In particular, the following things matter: - Currently loaded snippets tables These are loaded from a directory hierarchy in your file system. See - [[snippet-organization.html][Organizing Snippets]]. They are named + [[./snippet-organization.org][Organizing Snippets]]. They are named after major modes like =html-mode=, =ruby-mode=, etc... - Major mode of the current buffer @@ -138,7 +138,7 @@ In particular, the following things matter: also considered. This works recursively, i.e. parents of parents of eligible tables are also considered. -- Buffer-local =yas-mode-symbol= variable +- Buffer-local [[sym:yas-mode-symbol][=yas-mode-symbol=]] variable This can be used to consider snippet tables whose name does not correspond to a major mode. If you set this variable to a name , like @@ -146,7 +146,7 @@ In particular, the following things matter: minor mode. Naturally, you want to set this conditionally, i.e. only when entering that minor mode, so using a hook is a good idea. -- Buffer-local =yas-buffer-local-condition= variable +- Buffer-local [[sym:yas-buffer-local-condition][=yas-buffer-local-condition=]] variable This variable provides finer grained control over what snippets can be expanded in the current buffer. The default value won't let you @@ -156,23 +156,23 @@ In particular, the following things matter: *** The condition system Consider this scenario: you are an old Emacs hacker. You like the -abbrev-way and set =yas-trigger-key= to ="SPC"=. However, you don't want +abbrev-way and set [[sym:yas-trigger-key][=yas-trigger-key=]] to =SPC=. However, you don't want =if= to be expanded as a snippet when you are typing in a comment block or a string (e.g. in =python-mode=). If you use the =# condition := directive (see -[[snippet-development.html][Writing Snippets]]) you could just specify +[[./snippet-development.org][Writing Snippets]]) you could just specify the condition for =if= to be =(not (python-in-string/comment))=. But how about =while=, =for=, etc. ? Writing the same condition for all the snippets is just boring. So has a buffer local variable -=yas-buffer-local-condition=. You can set this variable to +[[sym:yas-buffer-local-condition][=yas-buffer-local-condition=]]. You can set this variable to =(not (python-in-string/comment))= in =python-mode-hook=. Then, what if you really want some particular snippet to expand even inside a comment? This is also possible! But let's stop telling the story and look at the rules: -- If =yas-buffer-local-condition= evaluate to nil, no snippets will be +- If [[sym:yas-buffer-local-condition][=yas-buffer-local-condition=]] evaluate to nil, no snippets will be considered for expansion. - If it evaluates to the a /cons cell/ where the =car= is the symbol @@ -204,7 +204,7 @@ story and look at the rules: - Otherwise, it won't be considered. -In the mentioned scenario, set =yas-buffer-local-condition= like this +In the mentioned scenario, set [[sym:yas-buffer-local-condition][=yas-buffer-local-condition=]] like this ... and specify the condition for a snippet that you're going to expand in comment to be evaluated to the symbol =force-in-comment=. Then it can @@ -218,7 +218,7 @@ one snippet to be expanded at point. When there are multiple candidates, YASnippet will let you select one. The UI for selecting multiple candidate can be customized through -=yas-prompt-functions= , which defines your preferred methods of being +[[sym:yas-prompt-functions][=yas-prompt-functions=]] , which defines your preferred methods of being prompted for snippets. You can customize it with @@ -227,11 +227,11 @@ can put in your emacs-file: Currently there are some alternatives solution with YASnippet. -[[images/x-menu.png]] +[[./images/x-menu.png]] **** Use the X window system -The function =yas-x-prompt= can be used to show a popup menu for you to +The function [[sym:yas-x-prompt][=yas-x-prompt=]] can be used to show a popup menu for you to select. This menu will be part of you native window system widget, which means: @@ -241,20 +241,20 @@ means: navigate this menu. - This function can't be used when in a terminal. -[[images/ido-menu.png]] +[[./images/ido-menu.png]] **** Minibuffer prompting -You can use functions =yas-completing-prompt= for the classic emacs -completion method or =yas-ido-prompt= for a much nicer looking method. +You can use functions [[sym:yas-completing-prompt][=yas-completing-prompt=]] for the classic emacs +completion method or [[sym:yas-ido-prompt][=yas-ido-prompt=]] for a much nicer looking method. The best way is to try it. This works in a terminal. -[[images/dropdown-menu.png]] +[[./images/dropdown-menu.png]] **** Use =dropdown-menu.el= -The function =yas-dropdown-prompt= can also be placed in the -=yas-prompt-functions= list. +The function [[sym:yas-dropdown-prompt][=yas-dropdown-prompt=]] can also be placed in the +[[sym:yas-prompt-functions][=yas-prompt-functions=]] list. This works in both window system and terminal and is customizable, you can use =C-n=, =C-p= to navigate, =q= to quit and even press =6= as a @@ -262,80 +262,5 @@ shortcut to select the 6th candidate. **** Roll your own -See below for the documentation on variable =yas-prompt-functions= +See the documentation on variable [[sym:yas-prompt-functions][=yas-prompt-functions=]] -** Customizable Variables - -*** =yas-prompt-functions= - -You can write a function and add it to the =yas-prompt-functions= list. -These functions are called with the following arguments: - -- PROMPT: A string to prompt the user; - -- CHOICES: A list of strings or objects; - -- optional DISPLAY-FN : A function. When applied to each of the objects - in CHOICES it will return a string; - -The return value of any function you put here should be one of the -objects in CHOICES, properly formatted with DISPLAY-FN (if that is -passed). - -- To signal that your particular style of prompting is unavailable at - the moment, you can also have the function return nil. - -- To signal that the user quit the prompting process, you can signal - =quit= with =(signal 'quit "user quit!")= - -*** =yas-fallback-behavior= - -How to act when =yas-expand= does /not/ expand a snippet. - -- =call-other-command= means try to temporarily disable YASnippet - and :: call the next command bound to =yas-trigger-key=. - -=return-nil= means return nil. (i.e. do nothing) - -An entry (apply COMMAND . ARGS) means interactively call COMMAND, if -ARGS is non-nil, call COMMAND non-interactively with ARGS as arguments. - -*** =yas-choose-keys-first= - -If non-nil, prompt for snippet key first, then for template. - -Otherwise prompts for all possible snippet names. - -This affects =yas-insert-snippet= and =yas-visit-snippet-file=. - -*** =yas-choose-tables-first= - -If non-nil, and multiple eligible snippet tables, prompts user for -tables first. - -Otherwise, user chooses between the merging together of all eligible -tables. - -This affects =yas-insert-snippet=, =yas-visit-snippet-file= - -*** =yas-key-syntaxes= - -The default searching strategy is quite powerful. For example, in -=c-mode=, =bar=, =foo_bar=, ="#foo_bar"= can all be recognized as a -snippet key. Furthermore, the searching is in that order. In other -words, if =bar= is found to be a key to some /valid/ snippet, then that -snippet is expanded and replaces the =bar=. Snippets pointed to by -=foo_bar= and ="#foobar= won't be considered. - -However, this strategy can also be customized easily from the -=yas-key-syntaxes= variable. It is a list of syntax rules, the default -value is =("w" "w_" "w_." "^ ")=. Which means search the following thing -until found one: - -- a word. -- a symbol. In lisp, =-= and =?= can all be part of a symbol. -- a sequence of characters of either word, symbol or punctuation. -- a sequence of characters of non-whitespace characters. - -But you'd better keep the default value unless you want to understand -how Emacs's syntax rules work...