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vim9script
# Maintainer: Maxim Kim <habamax@gmail.com>
# Last update: 2023-12-10
#
# Set of functions to format/beautify JSON data structures.
#
# Could be used to reformat a minified json in a buffer (put it into ~/.vim/ftplugin/json.vim):
# import autoload 'dist/json.vim'
# setl formatexpr=json.FormatExpr()
#
# Or to get a formatted string out of vim's dict/list/string:
# vim9script
# import autoload 'dist/json.vim'
# echo json.Format({
# "widget": { "debug": "on", "window": { "title": "Sample \"Konfabulator\" Widget",
# "name": "main_window", "width": 500, "height": 500
# },
# "image": { "src": "Images/Sun.png", "name": "sun1", "hOffset": 250,
# "vOffset": 250, "alignment": "center" },
# "text": { "data": "Click Here", "size": 36, "style": "bold", "name": "text1",
# "hOffset": 250, "vOffset": 100, "alignment": "center",
# "onMouseUp": "sun1.opacity = (sun1.opacity / 100) * 90;" } }
# })
#
# Should output:
# {
# "widget": {
# "debug": "on",
# "window": {
# "title": "Sample \"Konfabulator\" Widget",
# "name": "main_window",
# "width": 500,
# "height": 500
# },
# "image": {
# "src": "Images/Sun.png",
# "name": "sun1",
# "hOffset": 250,
# "vOffset": 250,
# "alignment": "center"
# },
# "text": {
# "data": "Click Here",
# "size": 36,
# "style": "bold",
# "name": "text1",
# "hOffset": 250,
# "vOffset": 100,
# "alignment": "center",
# "onMouseUp": "sun1.opacity = (sun1.opacity / 100) * 90;"
# }
# }
# }
#
# NOTE: order of `key: value` pairs is not kept.
#
# You can also use a JSON string instead of vim's dict/list to maintain order:
# echo json.Format('{"hello": 1, "world": 2}')
# {
# "hello": 1,
# "world": 2
# }
# To be able to reformat with `gq` add following to `~/.vim/ftplugin/json.vim`:
# import autoload 'dist/json.vim'
# setl formatexpr=json.FormatExpr()
export def FormatExpr(): number
FormatRange(v:lnum, v:lnum + v:count - 1)
return 0
enddef
# import autoload 'dist/json.vim'
# command -range=% JSONFormat json.FormatRange(<line1>, <line2>)
export def FormatRange(line1: number, line2: number)
var indent_base = matchstr(getline(line1), '^\s*')
var indent = &expandtab ? repeat(' ', &shiftwidth) : "\t"
var [l1, l2] = line1 > line2 ? [line2, line1] : [line1, line2]
var json_src = getline(l1, l2)->join()
var json_fmt = Format(json_src, {use_tabs: !&et, indent: &sw, indent_base: indent_base})->split("\n")
exe $":{l1},{l2}d"
if line('$') == 1 && getline(1) == ''
setline(l1, json_fmt[0])
append(l1, json_fmt[1 : ])
else
append(l1 - 1, json_fmt)
endif
enddef
# Format JSON string or dict/list as JSON
# import autoload 'dist/json.vim'
# echo json.Format('{"hello": "world"}', {use_tabs: false, indent: 2, indent_base: 0})
# {
# "hello": "world"
# }
# echo json.Format({'hello': 'world'}, {use_tabs: false, indent: 2, indent_base: 0})
# {
# "hello": "world"
# }
#
# Note, when `obj` is dict, order of the `key: value` pairs might be different:
# echo json.Format({'hello': 1, 'world': 2})
# {
# "world": 2,
# "hello": 1
# }
export def Format(obj: any, params: dict<any> = {}): string
var obj_str = ''
if type(obj) == v:t_string
obj_str = obj
else
obj_str = json_encode(obj)
endif
var indent_lvl = 0
var indent_base = get(params, "indent_base", "")
var indent = get(params, "use_tabs", false) ? "\t" : repeat(' ', get(params, "indent", 2))
var json_line = indent_base
var json = ""
var state = ""
for char in obj_str
if state == ""
if char =~ '[{\[]'
json_line ..= char
json ..= json_line .. "\n"
indent_lvl += 1
json_line = indent_base .. repeat(indent, indent_lvl)
elseif char =~ '[}\]]'
if json_line !~ '^\s*$'
json ..= json_line .. "\n"
indent_lvl -= 1
if indent_lvl < 0
json_line = strpart(indent_base, -indent_lvl * len(indent))
else
json_line = indent_base .. repeat(indent, indent_lvl)
endif
elseif json =~ '[{\[]\n$'
json = json[ : -2]
json_line = substitute(json_line, '^\s*', '', '')
indent_lvl -= 1
endif
json_line ..= char
elseif char == ':'
json_line ..= char .. ' '
elseif char == '"'
json_line ..= char
state = 'QUOTE'
elseif char == ','
json_line ..= char
json ..= json_line .. "\n"
json_line = indent_base .. repeat(indent, indent_lvl)
elseif char !~ '\s'
json_line ..= char
endif
elseif state == "QUOTE"
json_line ..= char
if char == '\'
state = "ESCAPE"
elseif char == '"'
state = ""
endif
elseif state == "ESCAPE"
state = "QUOTE"
json_line ..= char
else
json_line ..= char
endif
endfor
if json_line !~ '^\s*$'
json ..= json_line .. "\n"
endif
return json
enddef
|
