302 lines
15 KiB
Text
302 lines
15 KiB
Text
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*textformat.txt* Vim Text Formatter (version 2.1) 2008-09-13
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Description This plugin provides commands and key mappings to quickly
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align and format text. Text can be easily reformatted and
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aligned to either left or right margin or justified to both
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margins or centered. The text formatting commands provided by
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this plugin are a bit more automatic and more intelligent than
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those integrated to Vim. Together they make more powerful
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command set for formatting text.
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Author Teemu Likonen <tlikonen@iki.fi>
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Contents
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1. Quick start |textformat-start|
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2. Commands |textformat-commands|
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3. Default key mappings |textformat-keymap|
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4. Configuration |textformat-config|
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5. Version history |textformat-history|
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==============================================================================
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1. Quick start *textformat-start*
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The impatient are always with us so below is a short info on (probably) the
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most important tools provided by this plugin. See the following sections of
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this manual for more detailed instructions.
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<Leader>al Left-align and reformat
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<Leader>ar Right-align
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<Leader>aj Left-right justify and reformat
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<Leader>ac Center lines
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In normal mode the commands operate on current paragraph; in visual mode they
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operate on the selected lines. By default, <Leader> is the backslash key, so
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the mappings are actually \al, \ar, \aj and \ac, by default. If you have
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changed the g:mapleader variable in your .vimrc file <Leader> may be something
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else.
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==============================================================================
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2. Commands *textformat-commands*
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Let's start with the basic components of this plugin. These are the ex
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commands. You probably don't need these very often but they can be handy if
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you want to have text formatting and aligning as a part of a macro or function
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or something. The "daily tools" are explained later.
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:[range]AlignLeft [indent] *:AlignLeft*
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Align to left all the lines in [range] (default is
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current line) and truncate all extra whitespace
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characters. That is, if there are more than one space
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between words they are reduced to just one. If
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'joinspaces' is set then two spaces are added after
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every sentence ending with character ".", "?" or "!".
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If optional numeric argument [indent] is given then
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that is used as the left margin. If [indent] is not
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given the indent of the first line in the [range] (and
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the first line of each paragraph within the [range])
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is used to define indent for the rest of the lines in
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the paragraph. There is one exception: if
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'formatoptions' contains "2" then the second line
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defines the indent for the rest of the lines in the
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paragraph.
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Note: This is very similar to |:left| command except
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that this also truncates whitespaces and that without
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[indent] each paragraph's indent is detected and used.
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Note: There is a possible unexpected behaviour: If
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command is run without [range] (i.e., it's just the
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current line) and [indent] is not given then this
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command just "aligns" to the current indent position
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and truncates whitespaces. You might see nothing
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happening if there weren't any extra whitespaces. Use
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[indent] (or |:left| command) to align to desired
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column.
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:[range]AlignRight [width] *:AlignRight*
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Align to right all the lines in [range] (default is
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current line) and truncate all extra whitespace
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characters (honor 'joinspaces', as in :AlignLeft).
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[width] is used as the right margin. If [width] is not
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given the value of 'textwidth' option is used instead.
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If 'textwidth' is zero then the value of 80 is used.
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Note: This is very similar to |:right| command except
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that this also truncates whitespaces.
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:[range]AlignJustify [width] *:AlignJustify*
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Left-right justify lines in [range] (default is
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current line). This means adjusting spaces between
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words so that the lines fit. If 'joinspaces' is set
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then at least two spaces are printed after every
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sentence ending with a ".", "?" or "!". The first line
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in [range] (and the first line in each paragraph
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within the [range]) defines the indent for the rest of
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the lines in the paragraph, except if 'formatoptions'
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contains "2" then it's the second line.
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Numeric argument [width] is used as the right margin.
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If [width] is not given the value of 'textwidth' is
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used instead. If 'textwidth' is zero then the value of
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80 is used.
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Also see the Discussion below.
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:[range]AlignCenter [width] *:AlignCenter*
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Center lines in [range] (default is current line)
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between the first column and [width]. All extra
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whitespace characters are truncated (but honor
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'joinspaces', just like in :AlignLeft). If [width] is
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not given the value of 'textwidth' option is used
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instead. If 'textwidth' is zero the value of 80 is
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used.
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Note: This is very similar to |:center| except that
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this also truncates whitespaces.
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Discussion ~
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All the previous ex commands are rather "stupid" and operate on single lines
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only. They do not wrap lines nor do other kind of formatting. If [width] (or
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'textwidth') is too narrow for the line then some characters will go beyond
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the right margin. This is similar to Vim's own |:left|, |:right| and |:center|
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commands. More sophisticated formatting tools are provided as key mappings
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(see below).
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Usually when paragraphs are justified the last line of each paragraph is
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aligned to left. However, :AlignJustify command does not do this. The purpose
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of this command is to do exactly what was asked for: left-right justify
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a range of lines. More sophisticated justify tools is <Leader>aj which
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reformats the paragraph (like |gw|), justifies lines and aligns each
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paragraph's last line to left.
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All the commands truncate extra whitespaces which makes them work well
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together. This is particularly because the left-right justify needs to add
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extra spaces to make lines fill the text area. If you later want to reformat
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such previously justified paragraph and align it to left, for example, it's
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convenient that the tool automatically handles this and removes extra spaces.
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If you want to align text without truncating whitespaces use Vim's own align
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commands: |:left|, |:right| and |:center|.
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==============================================================================
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3. Default key mappings *textformat-keymap*
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By default this plugin provides a couple of key mappings for convenient text
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formatting. If the mappings have already been defined by user (or are taken by
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other plugins) then some of the following mappings may not be automatically
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available. See the next section of this manual for information on how to
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change the default mappings.
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There are key mappings available for normal mode and visual mode. As usual,
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<Leader> is the backslash key by default but it can be changed with
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g:mapleader variable. Consult the Vim manual for more information on <Leader>.
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Normal mode (current paragraph) ~
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<Leader>al Left-align the current "inner paragraph" (see |ip|)
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and reformat it according to 'textwidth'.
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<Leader>ar Right-align the current "inner paragraph" (see |ip|)
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to margin at 'textwidth'. This does not reformat the
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paragraph because with right-aligned text user usually
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wants to decide exactly what goes to what line.
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<Leader>aj Left-right justify the current "inner paragraph" (see
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|ip|). Technically each line's whitespaces are first
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truncated, then the text is reformatted according to
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'textwidth' and finally lines are justified. The last
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line (of each text paragraph) is aligned to left.
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<Leader>ac Center lines of current "inner paragraph" (see |ip|)
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between the first column and 'textwidth'. This does
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not reformat the paragraph because with centered text
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user usually wants to decide exactly what goes to what
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line.
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Visual mode (range of lines) ~
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{Visual}<Leader>al Left-align and reformat {Visual} lines so that they
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fill 'textwidth'.
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{Visual}<Leader>ar Right-align {Visual} lines.
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{Visual}<Leader>aj Left-right justify {Visual} lines. First truncate all
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extra whitespace characters, then reformat lines so
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that they fill 'textwidth' and finally left-right
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justify. The last line of each paragraph as well as
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the last line in {Visual} range is aligned to left.
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{Visual}<Leader>ac Center {Visual} lines.
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Both normal mode and visual mode commands truncate extra whitespace
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characters. If 'joinspaces' is set then an extra space is added after every
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sentence ending with a ".", "?" or "!". The first line in each paragraph
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inside the range defines the indent for the rest of the lines in the
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paragraph, except if 'formatoptions' contains "2" then it's the second line.
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Paragraph definitions ~
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The normal mode commands operate on the concept of "inner paragraph" (see
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|ip|). The effect is almost the same as selecting current paragraph with Vim's
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"vip" command and then executing the equivalent visual mode command. Such
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inner paragraph may contain several text paragraphs if 'formatoptions'
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contains "w". Each of them is reformatted separately with <Leader>al and
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<Leader>aj commands.
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New paragraph always begins after a blank line. If 'formatoptions' contains
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"w" then new paragraph also begins after a line which ends with
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a non-whitespace character. That is, with "w" in 'formatoptions' every line
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which ends with a non-whitespace also ends a paragraph. In left-right justify
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(<Leader>aj) such line is aligned to left. You need to ensure that there is
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a trailing whitespace in every consecutive line which belongs to same
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paragraph (the whitespace is preserved after formatting). If 'formatoptions'
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does not contain "w" then all consecutive non-blank lines belong to same
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paragraph.
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==============================================================================
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4. Configuration *textformat-config*
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The key mappings can be configured freely by user. This plugin uses the
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default ones only if they are free and not used for other purposes. Here's an
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example of lines you could put to your .vimrc file:
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>
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nmap <F5> <Plug>Quick_Align_Paragraph_Left
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nmap <F6> <Plug>Quick_Align_Paragraph_Right
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nmap <F7> <Plug>Quick_Align_Paragraph_Justify
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nmap <F8> <Plug>Quick_Align_Paragraph_Center
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vmap <F5> <Plug>Align_Range_Left
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vmap <F6> <Plug>Align_Range_Right
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vmap <F7> <Plug>Align_Range_Justify
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vmap <F8> <Plug>Align_Range_Center
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That is, |:nmap| command defines mappings for normal mode and |:vmap| for
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visual mode. Function keys from <F5> to <F8> are used in this example. The
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rest of the line is a code word for Vim and this plugin. They must be written
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exactly as shown in the example. I think the code words are pretty much
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self-descriptive.
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Don't use |:nnoremap| and |:vnoremap| commands here; they don't work because
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the right-hand side (<Plug>...) must be remappable. See Vim's manual for more
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information about the key map commands.
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Most part of this plugin is loaded into memory when the text-formatting
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commands or key maps are used for the first time. Only the very minimum is
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automatically loaded when Vim is started. If you want to completely avoid
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loading this plugin put the following line to your .vimrc file:
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>
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let g:loaded_textformat = 1
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Happy formatting!
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==============================================================================
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5. Version history *textformat-history*
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v2.1 2008-09-13
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- Minor internal cleanup.
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v2.0 2008-08-10
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- \al and \aj now reformat text also in visual mode.
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- \al and \aj honor "w" in 'formatoptions' and detect paragraph
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boundaries accordingly.
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- :AlignLeft, :AlignJustify, \al and \aj recognize several
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paragraphs within the range and detect indent for each
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paragraph separately.
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- Add logic to load the plugin script only once.
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v1.1 2008-08-04
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- Keep cursor position more accurately when formatting
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a paragraph with \al and \aj.
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- When 'joinspaces' is set insert two spaces after .?!
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punctuation with left-right justify. This is now similar to
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other commands.
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v1.0 2008-08-03
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- All the commands now follow user's 'expandtab' setting and
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print leading whitespaces accordingly. Now this works just
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like :left, :right and :center commands.
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- The left-aligned last line in justified paragraph did not
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honor 'joinspaces'. Fixed.
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v0.9 2008-08-01
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- Initial upload to http://www.vim.org .
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==============================================================================
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vim: ft=help tw=78 ts=8 et norl fo+=2aw
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