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runtime(doc): include a TOC Vim9 plugin

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closes: #10446

See :h help-TOC

Signed-off-by: lagygoill <lacygoill@lacygoill.me>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
lagygoill 2024-11-02 17:58:01 +01:00 committed by Christian Brabandt
parent 29ce419076
commit b3ec5643cd
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5 changed files with 1005 additions and 2 deletions
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57
runtime/doc/helphelp.txt
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@ -1,4 +1,4 @@
*helphelp.txt* For Vim version 9.1. Last change: 2024 Apr 10
*helphelp.txt* For Vim version 9.1. Last change: 2024 Nov 02
VIM REFERENCE MANUAL by Bram Moolenaar
@ -246,6 +246,61 @@ command: >
To rebuild the help tags in the runtime directory
(requires write permission there): >
:helptags $VIMRUNTIME/doc
<
*help-TOC* *help-toc-install*
If you want to access an interactive table of contents, from any position in
the file, you can use the helptoc plugin. Load the plugin with: >
packadd helptoc
Then you can use the `:HelpToc` command to open a popup menu.
The latter supports the following normal commands: >
key | effect
----+---------------------------------------------------------
j | select next entry
k | select previous entry
J | same as j, and jump to corresponding line in main buffer
K | same as k, and jump to corresponding line in main buffer
c | select nearest entry from cursor position in main buffer
g | select first entry
G | select last entry
H | collapse one level
L | expand one level
p | print current entry on command-line
P | same as p but automatically, whenever selection changes
| press multiple times to toggle feature on/off
q | quit menu
z | redraw menu with current entry at center
+ | increase width of popup menu
- | decrease width of popup menu
? | show/hide a help window
<C-D> | scroll down half a page
<C-U> | scroll up half a page
<PageUp> | scroll down a whole page
<PageDown> | scroll up a whole page
<Home> | select first entry
<End> | select last entry
The plugin can also provide a table of contents in man pages, markdown files,
and terminal buffers. In the latter, the entries will be the past executed
shell commands. To find those, the following regex is used: >
^\w\+@\w\+:\f\+\$\s
This is meant to match a default bash prompt. If it doesn't match your prompt,
you can change the regex with the `shell_prompt` key from the `g:helptoc`
dictionary variable: >
let g:helptoc = {'shell_prompt': 'regex matching your shell prompt'}
Tip: After inserting a pattern to look for with the `/` command, if you press
<Esc> instead of <CR>, you can then get more context for each remaining entry
by pressing `J` or `K`.
==============================================================================
2. Translated help files *help-translated*

2
runtime/doc/tags
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@ -8062,11 +8062,13 @@ hasmapto() builtin.txt /*hasmapto()*
hebrew hebrew.txt /*hebrew*
hebrew.txt hebrew.txt /*hebrew.txt*
help helphelp.txt /*help*
help-TOC helphelp.txt /*help-TOC*
help-buffer-options helphelp.txt /*help-buffer-options*
help-context help.txt /*help-context*
help-curwin tips.txt /*help-curwin*
help-summary usr_02.txt /*help-summary*
help-tags tags 1
help-toc-install helphelp.txt /*help-toc-install*
help-translated helphelp.txt /*help-translated*
help-writing helphelp.txt /*help-writing*
help-xterm-window helphelp.txt /*help-xterm-window*

3
runtime/doc/version9.txt
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@ -1,4 +1,4 @@
*version9.txt* For Vim version 9.1. Last change: 2024 Oct 27
*version9.txt* For Vim version 9.1. Last change: 2024 Nov 02
VIM REFERENCE MANUAL by Bram Moolenaar
@ -41602,6 +41602,7 @@ Changed~
selection in the quickfix list with the "u" action.
- the putty terminal is detected using an |TermResponse| autocommand in
|defaults.vim| and Vim switches to a dark background
- the |help-TOC| package is included to ease navigating the documentation.
*added-9.2*
Added ~

940
runtime/pack/dist/opt/helptoc/autoload/helptoc.vim vendored Normal file
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@ -0,0 +1,940 @@
vim9script noclear
# Config {{{1
const SHELL_PROMPT: string = g:
->get('helptoc', {})
->get('shell_prompt', '^\w\+@\w\+:\f\+\$\s')
# Init {{{1
const HELP_TEXT: list<string> =<< trim END
normal commands in help window
──────────────────────────────
? hide this help window
<C-J> scroll down one line
<C-K> scroll up one line
normal commands in TOC menu
───────────────────────────
j select next entry
k select previous entry
J same as j, and jump to corresponding line in main buffer
K same as k, and jump to corresponding line in main buffer
c select nearest entry from cursor position in main buffer
g select first entry
G select last entry
H collapse one level
L expand one level
p print selected entry on command-line
P same as p but automatically, whenever selection changes
press multiple times to toggle feature on/off
q quit menu
z redraw menu with selected entry at center
+ increase width of popup menu
- decrease width of popup menu
/ look for given text with fuzzy algorithm
? show help window
<C-D> scroll down half a page
<C-U> scroll up half a page
<PageUp> scroll down a whole page
<PageDown> scroll up a whole page
<Home> select first entry
<End> select last entry
title meaning
─────────────
example: 12/34 (5/6)
broken down:
12 index of selected entry
34 index of last entry
5 index of deepest level currently visible
6 index of maximum possible level
tip
───
after inserting a pattern to look for with the / command,
if you press <Esc> instead of <CR>, you can then get
more context for each remaining entry by pressing J or K
END
const MATCH_ENTRY: dict<dict<func: bool>> = {
help: {},
man: {
1: (line: string, _): bool => line =~ '^\S',
2: (line: string, _): bool => line =~ '^\%( \{3\}\)\=\S',
3: (line: string, _): bool => line =~ '^\s\+\(\%(+\|-\)\S\+,\s\+\)*\%(+\|-\)\S\+',
},
markdown: {
1: (line: string, nextline: string): bool =>
(line =~ '^#[^#]' || nextline =~ '^=\+$') && line =~ '\w',
2: (line: string, nextline: string): bool =>
(line =~ '^##[^#]' || nextline =~ '^-\+$') && line =~ '\w',
3: (line: string, _): bool => line =~ '^###[^#]',
4: (line: string, _): bool => line =~ '^####[^#]',
5: (line: string, _): bool => line =~ '^#####[^#]',
6: (line: string, _): bool => line =~ '^######[^#]',
},
terminal: {
1: (line: string, _): bool => line =~ SHELL_PROMPT,
}
}
const HELP_RULERS: dict<string> = {
'=': '^=\{40,}$',
'-': '^-\{40,}',
}
const HELP_RULER: string = HELP_RULERS->values()->join('\|')
# the regex is copied from the help syntax plugin
const HELP_TAG: string = '\*[#-)!+-~]\+\*\%(\s\|$\)\@='
# Adapted from `$VIMRUNTIME/syntax/help.vim`.{{{
#
# The original regex is:
#
# ^[-A-Z .][-A-Z0-9 .()_]*\ze\(\s\+\*\|$\)
#
# Allowing a space or a hyphen at the start can give false positives, and is
# useless, so we don't allow them.
#}}}
const HELP_HEADLINE: string = '^\C[A-Z.][-A-Z0-9 .()_]*\%(\s\+\*+\@!\|$\)'
# ^--^
# To prevent some false positives under `:help feature-list`.
var lvls: dict<number>
def InitHelpLvls()
lvls = {
'*01.1*': 0,
'1.': 0,
'1.2': 0,
'1.2.3': 0,
'header ~': 0,
HEADLINE: 0,
tag: 0,
}
enddef
const AUGROUP: string = 'HelpToc'
var fuzzy_entries: list<dict<any>>
var help_winid: number
var print_entry: bool
var selected_entry_match: number
# Interface {{{1
export def Open() #{{{2
var type: string = GetType()
if !MATCH_ENTRY->has_key(type)
return
endif
if type == 'terminal' && win_gettype() == 'popup'
# trying to deal with a popup menu on top of a popup terminal seems
# too tricky for now
echomsg 'does not work in a popup window; only in a regular window'
return
endif
# invalidate the cache if the buffer's contents has changed
if exists('b:toc') && &filetype != 'man'
if b:toc.changedtick != b:changedtick
# in a terminal buffer, `b:changedtick` does not change
|| type == 'terminal' && line('$') > b:toc.linecount
unlet! b:toc
endif
endif
if !exists('b:toc')
SetToc()
endif
var winpos: list<number> = winnr()->win_screenpos()
var height: number = winheight(0) - 2
var width: number = winwidth(0)
b:toc.width = b:toc.width ?? width / 3
# the popup needs enough space to display the help message in its title
if b:toc.width < 30
b:toc.width = 30
endif
# Is `popup_menu()` OK with a list of dictionaries?{{{
#
# Yes, see `:help popup_create-arguments`.
# Although, it expects dictionaries with the keys `text` and `props`.
# But we use dictionaries with the keys `text` and `lnum`.
# IOW, we abuse the feature which lets us use text properties in a popup.
#}}}
var winid: number = GetTocEntries()
->popup_menu({
line: winpos[0],
col: winpos[1] + width - 1,
pos: 'topright',
scrollbar: false,
highlight: type == 'terminal' ? 'Terminal' : 'Normal',
border: [],
borderchars: ['─', '│', '─', '│', '┌', '┐', '┘', '└'],
minheight: height,
maxheight: height,
minwidth: b:toc.width,
maxwidth: b:toc.width,
filter: Filter,
callback: Callback,
})
Win_execute(winid, [$'ownsyntax {&filetype}', '&l:conceallevel = 3'])
# In a help file, we might reduce some noisy tags to a trailing asterisk.
# Hide those.
if type == 'help'
matchadd('Conceal', '\*$', 0, -1, {window: winid})
endif
SelectNearestEntryFromCursor(winid)
# can't set the title before jumping to the relevant line, otherwise the
# indicator in the title might be wrong
SetTitle(winid)
enddef
#}}}1
# Core {{{1
def SetToc() #{{{2
var toc: dict<any> = {entries: []}
var type: string = GetType()
toc.changedtick = b:changedtick
if !toc->has_key('width')
toc.width = 0
endif
# We cache the toc in `b:toc` to get better performance.{{{
#
# Without caching, when we press `H`, `L`, `H`, `L`, ... quickly for a few
# seconds, there is some lag if we then try to move with `j` and `k`.
# This can only be perceived in big man pages like with `:Man ffmpeg-all`.
#}}}
b:toc = toc
if type == 'help'
SetTocHelp()
return
endif
if type == 'terminal'
b:toc.linecount = line('$')
endif
var curline: string = getline(1)
var nextline: string
var lvl_and_test: list<list<any>> = MATCH_ENTRY
->get(type, {})
->items()
->sort((l: list<any>, ll: list<any>): number => l[0]->str2nr() - ll[0]->str2nr())
for lnum: number in range(1, line('$'))
nextline = getline(lnum + 1)
for [lvl: string, IsEntry: func: bool] in lvl_and_test
if IsEntry(curline, nextline)
b:toc.entries->add({
lnum: lnum,
lvl: lvl->str2nr(),
text: curline,
})
break
endif
endfor
curline = nextline
endfor
InitMaxAndCurLvl()
enddef
def SetTocHelp() #{{{2
var main_ruler: string
for line: string in getline(1, '$')
if line =~ HELP_RULER
main_ruler = line =~ '=' ? HELP_RULERS['='] : HELP_RULERS['-']
break
endif
endfor
var prevline: string
var curline: string = getline(1)
var nextline: string
var in_list: bool
var last_numbered_entry: number
InitHelpLvls()
for lnum: number in range(1, line('$'))
nextline = getline(lnum + 1)
if main_ruler != '' && curline =~ main_ruler
last_numbered_entry = 0
# The information gathered in `lvls` might not be applicable to all
# the main sections of a help file. Let's reset it whenever we find
# a ruler.
InitHelpLvls()
endif
# Do not assume that a list ends on an empty line.
# See the list at `:help gdb` for a counter-example.
if in_list
&& curline !~ '^\d\+.\s'
&& curline !~ '^\s*$'
&& curline !~ '^[< \t]'
in_list = false
endif
if prevline =~ '^\d\+\.\s'
&& curline !~ '^\s*$'
&& curline !~ $'^\s*{HELP_TAG}'
in_list = true
endif
# 1.
if prevline =~ '^\d\+\.\s'
# let's assume that the start of a main entry is always followed by an
# empty line, or a line starting with a tag
&& (curline =~ '^>\=\s*$' || curline =~ $'^\s*{HELP_TAG}')
# ignore a numbered line in a list
&& !in_list
var current_numbered_entry: number = prevline
->matchstr('^\d\+\ze\.\s')
->str2nr()
if current_numbered_entry > last_numbered_entry
AddEntryInTocHelp('1.', lnum - 1, prevline)
last_numbered_entry = prevline
->matchstr('^\d\+\ze\.\s')
->str2nr()
endif
endif
# 1.2
if curline =~ '^\d\+\.\d\+\s'
if curline =~ $'\%({HELP_TAG}\s*\|\~\)$'
|| (prevline =~ $'^\s*{HELP_TAG}' || nextline =~ $'^\s*{HELP_TAG}')
|| (prevline =~ HELP_RULER || nextline =~ HELP_RULER)
|| (prevline =~ '^\s*$' && nextline =~ '^\s*$')
AddEntryInTocHelp('1.2', lnum, curline)
endif
# 1.2.3
elseif curline =~ '^\s\=\d\+\.\d\+\.\d\+\s'
AddEntryInTocHelp('1.2.3', lnum, curline)
endif
# HEADLINE
if curline =~ HELP_HEADLINE
&& curline !~ '^CTRL-'
&& prevline->IsSpecialHelpLine()
&& (nextline->IsSpecialHelpLine() || nextline =~ '^\s*(\|^\t\|^N[oO][tT][eE]:')
AddEntryInTocHelp('HEADLINE', lnum, curline)
endif
# header ~
if curline =~ '\~$'
&& curline =~ '\w'
&& curline !~ '^[ \t<]\|\t\|---+---\|^NOTE:'
&& curline !~ '^\d\+\.\%(\d\+\%(\.\d\+\)\=\)\=\s'
&& prevline !~ $'^\s*{HELP_TAG}'
&& prevline !~ '\~$'
&& nextline !~ '\~$'
AddEntryInTocHelp('header ~', lnum, curline)
endif
# *some_tag*
if curline =~ HELP_TAG
AddEntryInTocHelp('tag', lnum, curline)
endif
# In the Vim user manual, a main section is a special case.{{{
#
# It's not a simple numbered section:
#
# 01.1
#
# It's used as a tag:
#
# *01.1* Two manuals
# ^ ^
#}}}
if prevline =~ main_ruler && curline =~ '^\*\d\+\.\d\+\*'
AddEntryInTocHelp('*01.1*', lnum, curline)
endif
[prevline, curline] = [curline, nextline]
endfor
# let's ignore the tag on the first line (not really interesting)
if b:toc.entries->get(0, {})->get('lnum') == 1
b:toc.entries->remove(0)
endif
# let's also ignore anything before the first `1.` line
var i: number = b:toc.entries
->copy()
->map((_, entry: dict<any>) => entry.text)
->match('^\s*1\.\s')
if i > 0
b:toc.entries->remove(0, i - 1)
endif
InitMaxAndCurLvl()
# set level of tag entries to the deepest level
var has_tag: bool = b:toc.entries
->copy()
->map((_, entry: dict<any>) => entry.text)
->match(HELP_TAG) >= 0
if has_tag
++b:toc.maxlvl
endif
b:toc.entries
->map((_, entry: dict<any>) => entry.lvl == 0
? entry->extend({lvl: b:toc.maxlvl})
: entry)
# fix indentation
var min_lvl: number = b:toc.entries
->copy()
->map((_, entry: dict<any>) => entry.lvl)
->min()
for entry: dict<any> in b:toc.entries
entry.text = entry.text
->substitute('^\s*', () => repeat(' ', (entry.lvl - min_lvl) * 3), '')
endfor
enddef
def AddEntryInTocHelp(type: string, lnum: number, line: string) #{{{2
# don't add a duplicate entry
if lnum == b:toc.entries->get(-1, {})->get('lnum')
# For a numbered line containing a tag, *do* add an entry.
# But only for its numbered prefix, not for its tag.
# The former is the line's most meaningful representation.
if b:toc.entries->get(-1, {})->get('type') == 'tag'
b:toc.entries->remove(-1)
else
return
endif
endif
var text: string = line
if type == 'tag'
var tags: list<string>
text->substitute(HELP_TAG, () => !!tags->add(submatch(0)), 'g')
text = tags
# we ignore errors and warnings because those are meaningless in
# a TOC where no context is available
->filter((_, tag: string) => tag !~ '\*[EW]\d\+\*')
->join()
if text !~ HELP_TAG
return
endif
endif
var maxlvl: number = lvls->values()->max()
if type == 'tag'
lvls[type] = 0
elseif type == '1.2'
lvls[type] = lvls[type] ?? lvls->get('1.', maxlvl) + 1
elseif type == '1.2.3'
lvls[type] = lvls[type] ?? lvls->get('1.2', maxlvl) + 1
else
lvls[type] = lvls[type] ?? maxlvl + 1
endif
# Ignore noisy tags.{{{
#
# 14. Linking groups *:hi-link* *:highlight-link* *E412* *E413*
# ^----------------------------------------^
# ^\s*\d\+\.\%(\d\+\.\=\)*\s\+.\{-}\zs\*.*
# ---
#
# We don't use conceal because then, `matchfuzzypos()` could match concealed
# characters, which would be confusing.
#}}}
# MAKING YOUR OWN SYNTAX FILES *mysyntaxfile*
# ^------------^
# ^\s*[A-Z].\{-}\*\zs.*
#
var after_HEADLINE: string = '^\s*[A-Z].\{-}\*\zs.*'
# 14. Linking groups *:hi-link* *:highlight-link* *E412* *E413*
# ^----------------------------------------^
# ^\s*\d\+\.\%(\d\+\.\=\)*\s\+.\{-}\*\zs.*
var after_numbered: string = '^\s*\d\+\.\%(\d\+\.\=\)*\s\+.\{-}\*\zs.*'
# 01.3 Using the Vim tutor *tutor* *vimtutor*
# ^----------------^
var after_numbered_tutor: string = '^\*\d\+\.\%(\d\+\.\=\)*.\{-}\t\*\zs.*'
var noisy_tags: string = $'{after_HEADLINE}\|{after_numbered}\|{after_numbered_tutor}'
text = text->substitute(noisy_tags, '', '')
# We don't remove the trailing asterisk, because the help syntax plugin
# might need it to highlight some headlines.
b:toc.entries->add({
lnum: lnum,
lvl: lvls[type],
text: text,
type: type,
})
enddef
def InitMaxAndCurLvl() #{{{2
b:toc.maxlvl = b:toc.entries
->copy()
->map((_, entry: dict<any>) => entry.lvl)
->max()
b:toc.curlvl = b:toc.maxlvl
enddef
def Popup_settext(winid: number, entries: list<dict<any>>) #{{{2
var text: list<any>
# When we fuzzy search the toc, the dictionaries in `entries` contain a
# `props` key, to highlight each matched character individually.
# We don't want to process those dictionaries further.
# The processing should already have been done by the caller.
if entries->get(0, {})->has_key('props')
text = entries
else
text = entries
->copy()
->map((_, entry: dict<any>): string => entry.text)
endif
popup_settext(winid, text)
SetTitle(winid)
redraw
enddef
def SetTitle(winid: number) #{{{2
var curlnum: number
var lastlnum: number = line('$', winid)
var is_empty: bool = lastlnum == 1
&& winid->winbufnr()->getbufoneline(1) == ''
if is_empty
[curlnum, lastlnum] = [0, 0]
else
curlnum = line('.', winid)
endif
var newtitle: string = printf(' %*d/%d (%d/%d)',
len(lastlnum), curlnum,
lastlnum,
b:toc.curlvl,
b:toc.maxlvl,
)
var width: number = winid->popup_getoptions().minwidth
newtitle = printf('%s%*s',
newtitle,
width - newtitle->strlen(),
'press ? for help ')
popup_setoptions(winid, {title: newtitle})
enddef
def SelectNearestEntryFromCursor(winid: number) #{{{2
var lnum: number = line('.')
var firstline: number = b:toc.entries
->copy()
->filter((_, line: dict<any>): bool => line.lvl <= b:toc.curlvl && line.lnum <= lnum)
->len()
if firstline == 0
return
endif
Win_execute(winid, $'normal! {firstline}Gzz')
enddef
def Filter(winid: number, key: string): bool #{{{2
# support various normal commands for moving/scrolling
if [
'j', 'J', 'k', 'K', "\<Down>", "\<Up>", "\<C-N>", "\<C-P>",
"\<C-D>", "\<C-U>",
"\<PageUp>", "\<PageDown>",
'g', 'G', "\<Home>", "\<End>",
'z'
]->index(key) >= 0
var scroll_cmd: string = {
J: 'j',
K: 'k',
g: '1G',
"\<Home>": '1G',
"\<End>": 'G',
z: 'zz'
}->get(key, key)
var old_lnum: number = line('.', winid)
Win_execute(winid, $'normal! {scroll_cmd}')
var new_lnum: number = line('.', winid)
if print_entry
PrintEntry(winid)
endif
# wrap around the edges
if new_lnum == old_lnum
scroll_cmd = {
j: '1G',
J: '1G',
k: 'G',
K: 'G',
"\<Down>": '1G',
"\<Up>": 'G',
"\<C-N>": '1G',
"\<C-P>": 'G',
}->get(key, '')
if !scroll_cmd->empty()
Win_execute(winid, $'normal! {scroll_cmd}')
endif
endif
# move the cursor to the corresponding line in the main buffer
if key == 'J' || key == 'K'
var lnum: number = GetBufLnum(winid)
execute $'normal! 0{lnum}zt'
# install a match in the regular buffer to highlight the position of
# the entry in the latter
MatchDelete()
selected_entry_match = matchaddpos('IncSearch', [lnum], 0, -1)
endif
SetTitle(winid)
return true
elseif key == 'c'
SelectNearestEntryFromCursor(winid)
return true
# when we press `p`, print the selected line (useful when it's truncated)
elseif key == 'p'
PrintEntry(winid)
return true
# same thing, but automatically
elseif key == 'P'
print_entry = !print_entry
if print_entry
PrintEntry(winid)
else
echo ''
endif
return true
elseif key == 'q'
popup_close(winid, -1)
return true
elseif key == '?'
ToggleHelp(winid)
return true
# scroll help window
elseif key == "\<C-J>" || key == "\<C-K>"
var scroll_cmd: string = {"\<C-J>": 'j', "\<C-K>": 'k'}->get(key, key)
if scroll_cmd == 'j' && line('.', help_winid) == line('$', help_winid)
scroll_cmd = '1G'
elseif scroll_cmd == 'k' && line('.', help_winid) == 1
scroll_cmd = 'G'
endif
Win_execute(help_winid, $'normal! {scroll_cmd}')
return true
# increase/decrease the popup's width
elseif key == '+' || key == '-'
var width: number = winid->popup_getoptions().minwidth
if key == '-' && width == 1
|| key == '+' && winid->popup_getpos().col == 1
return true
endif
width = width + (key == '+' ? 1 : -1)
# remember the last width if we close and re-open the TOC later
b:toc.width = width
popup_setoptions(winid, {minwidth: width, maxwidth: width})
return true
elseif key == 'H' && b:toc.curlvl > 1
|| key == 'L' && b:toc.curlvl < b:toc.maxlvl
CollapseOrExpand(winid, key)
return true
elseif key == '/'
# This is probably what the user expect if they've started a first fuzzy
# search, press Escape, then start a new one.
DisplayNonFuzzyToc(winid)
[{
group: AUGROUP,
event: 'CmdlineChanged',
pattern: '@',
cmd: $'FuzzySearch({winid})',
replace: true,
}, {
group: AUGROUP,
event: 'CmdlineLeave',
pattern: '@',
cmd: 'TearDown()',
replace: true,
}]->autocmd_add()
# Need to evaluate `winid` right now with an `eval`'ed and `execute()`'ed heredoc because:{{{
#
# - the mappings can only access the script-local namespace
# - `winid` is in the function namespace; not in the script-local one
#}}}
var input_mappings: list<string> =<< trim eval END
cnoremap <buffer><nowait> <Down> <ScriptCmd>Filter({winid}, 'j')<CR>
cnoremap <buffer><nowait> <Up> <ScriptCmd>Filter({winid}, 'k')<CR>
cnoremap <buffer><nowait> <C-N> <ScriptCmd>Filter({winid}, 'j')<CR>
cnoremap <buffer><nowait> <C-P> <ScriptCmd>Filter({winid}, 'k')<CR>
END
input_mappings->execute()
var look_for: string
try
popup_setoptions(winid, {mapping: true})
look_for = input('look for: ', '', $'custom,{Complete->string()}') | redraw | echo ''
catch /Vim:Interrupt/
TearDown()
finally
popup_setoptions(winid, {mapping: false})
endtry
return look_for == '' ? true : popup_filter_menu(winid, "\<CR>")
endif
return popup_filter_menu(winid, key)
enddef
def FuzzySearch(winid: number) #{{{2
var look_for: string = getcmdline()
if look_for == ''
DisplayNonFuzzyToc(winid)
return
endif
# We match against *all* entries; not just the currently visible ones.
# Rationale: If we use a (fuzzy) search, we're probably lost. We don't know
# where the info is.
var matches: list<list<any>> = b:toc.entries
->copy()
->matchfuzzypos(look_for, {key: 'text'})
fuzzy_entries = matches->get(0, [])->copy()
var pos: list<list<number>> = matches->get(1, [])
var text: list<dict<any>>
if !has('textprop')
text = matches->get(0, [])
else
var buf: number = winid->winbufnr()
if prop_type_get('help-fuzzy-toc', {bufnr: buf}) == {}
prop_type_add('help-fuzzy-toc', {
bufnr: buf,
combine: false,
highlight: 'IncSearch',
})
endif
text = matches
->get(0, [])
->map((i: number, match: dict<any>) => ({
text: match.text,
props: pos[i]->copy()->map((_, col: number) => ({
col: col + 1,
length: 1,
type: 'help-fuzzy-toc',
}))}))
endif
Win_execute(winid, 'normal! 1Gzt')
Popup_settext(winid, text)
enddef
def DisplayNonFuzzyToc(winid: number) #{{{2
fuzzy_entries = null_list
Popup_settext(winid, GetTocEntries())
enddef
def PrintEntry(winid: number) #{{{2
echo GetTocEntries()[line('.', winid) - 1]['text']
enddef
def CollapseOrExpand(winid: number, key: string) #{{{2
# Must be saved before we reset the popup contents, so we can
# automatically select the least unexpected entry in the updated popup.
var buf_lnum: number = GetBufLnum(winid)
# find the nearest lower level for which the contents of the TOC changes
if key == 'H'
while b:toc.curlvl > 1
var old: list<dict<any>> = GetTocEntries()
--b:toc.curlvl
var new: list<dict<any>> = GetTocEntries()
# In `:help`, there are only entries in levels 3.
# We don't want to collapse to level 2, nor 1.
# It would clear the TOC which is confusing.
if new->empty()
++b:toc.curlvl
break
endif
var did_change: bool = new != old
if did_change || b:toc.curlvl == 1
break
endif
endwhile
# find the nearest upper level for which the contents of the TOC changes
else
while b:toc.curlvl < b:toc.maxlvl
var old: list<dict<any>> = GetTocEntries()
++b:toc.curlvl
var did_change: bool = GetTocEntries() != old
if did_change || b:toc.curlvl == b:toc.maxlvl
break
endif
endwhile
endif
# update the popup contents
var toc_entries: list<dict<any>> = GetTocEntries()
Popup_settext(winid, toc_entries)
# Try to select the same entry; if it's no longer visible, select its
# direct parent.
var toc_lnum: number = 0
for entry: dict<any> in toc_entries
if entry.lnum > buf_lnum
break
endif
++toc_lnum
endfor
Win_execute(winid, $'normal! {toc_lnum ?? 1}Gzz')
enddef
def MatchDelete() #{{{2
if selected_entry_match == 0
return
endif
selected_entry_match->matchdelete()
selected_entry_match = 0
enddef
def Callback(winid: number, choice: number) #{{{2
MatchDelete()
if help_winid != 0
help_winid->popup_close()
help_winid = 0
endif
if choice == -1
fuzzy_entries = null_list
return
endif
var lnum: number = GetTocEntries()
->get(choice - 1, {})
->get('lnum')
fuzzy_entries = null_list
if lnum == 0
return
endif
cursor(lnum, 1)
normal! zvzt
enddef
def ToggleHelp(menu_winid: number) #{{{2
if help_winid == 0
var height: number = [HELP_TEXT->len(), winheight(0) * 2 / 3]->min()
var longest_line: number = HELP_TEXT
->copy()
->map((_, line: string) => line->strcharlen())
->max()
var width: number = [longest_line, winwidth(0) * 2 / 3]->min()
var pos: dict<number> = popup_getpos(menu_winid)
var [line: number, col: number] = [pos.line, pos.col]
--col
var zindex: number = popup_getoptions(menu_winid).zindex
++zindex
help_winid = HELP_TEXT->popup_create({
line: line,
col: col,
pos: 'topright',
minheight: height,
maxheight: height,
minwidth: width,
maxwidth: width,
border: [],
borderchars: ['─', '│', '─', '│', '┌', '┐', '┘', '└'],
highlight: &buftype == 'terminal' ? 'Terminal' : 'Normal',
scrollbar: false,
zindex: zindex,
})
setwinvar(help_winid, '&cursorline', true)
setwinvar(help_winid, '&linebreak', true)
matchadd('Special', '^<\S\+\|^\S\{,2} \@=', 0, -1, {window: help_winid})
matchadd('Number', '\d\+', 0, -1, {window: help_winid})
for lnum: number in HELP_TEXT->len()->range()
if HELP_TEXT[lnum] =~ '^─\+$'
matchaddpos('Title', [lnum], 0, -1, {window: help_winid})
endif
endfor
else
if IsVisible(help_winid)
popup_hide(help_winid)
else
popup_show(help_winid)
endif
endif
enddef
def Win_execute(winid: number, cmd: any) #{{{2
# wrapper around `win_execute()` to enforce a redraw, which might be necessary
# whenever we change the cursor position
win_execute(winid, cmd)
redraw
enddef
def TearDown() #{{{2
autocmd_delete([{group: AUGROUP}])
cunmap <buffer> <Down>
cunmap <buffer> <Up>
cunmap <buffer> <C-N>
cunmap <buffer> <C-P>
enddef
#}}}1
# Util {{{1
def GetType(): string #{{{2
return &buftype == 'terminal' ? 'terminal' : &filetype
enddef
def GetTocEntries(): list<dict<any>> #{{{2
return fuzzy_entries ?? b:toc.entries
->copy()
->filter((_, entry: dict<any>): bool => entry.lvl <= b:toc.curlvl)
enddef
def GetBufLnum(winid: number): number #{{{2
var toc_lnum: number = line('.', winid)
return GetTocEntries()
->get(toc_lnum - 1, {})
->get('lnum')
enddef
def IsVisible(win: number): bool #{{{2
return win->popup_getpos()->get('visible')
enddef
def IsSpecialHelpLine(line: string): bool #{{{2
return line =~ '^[<>]\=\s*$'
|| line =~ '^\s*\*'
|| line =~ HELP_RULER
|| line =~ HELP_HEADLINE
enddef
def Complete(..._): string #{{{2
return b:toc.entries
->copy()
->map((_, entry: dict<any>) => entry.text->trim(' ~')->substitute('*', '', 'g'))
->filter((_, text: string): bool => text =~ '^[-a-zA-Z0-9_() ]\+$')
->sort()
->uniq()
->join("\n")
enddef

5
runtime/pack/dist/opt/helptoc/plugin/helptoc.vim vendored Normal file
View File

@ -0,0 +1,5 @@
vim9script noclear
import autoload '../autoload/helptoc.vim'
command -bar HelpToc helptoc.Open()