summaryrefslogtreecommitdiffstats
path: root/.vim/autoload/snipMate.vim
blob: 618eddd39f1842c3e237718a477646a657673dec (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
fun! Filename(...)
	let filename = expand('%:t:r')
	if filename == '' | return a:0 == 2 ? a:2 : '' | endif
	return !a:0 || a:1 == '' ? filename : substitute(a:1, '$1', filename, 'g')
endf

fun s:RemoveSnippet()
	unl g:snipPos s:curPos s:snipLen s:endSnip s:endSnipLine s:prevLen
endf

fun snipMate#expandSnip(snip, col)
	let lnum = line('.') | let col = a:col

	let snippet = s:ProcessSnippet(a:snip)
	if snippet == '' | return '' | endif

	let snipLines = split(substitute(snippet, '$\d\+\|${\d\+.\{-}}', '', 'g'), "\n", 1)

	let line = getline(lnum)
	let afterCursor = strpart(line, col - 1)
	if afterCursor != "\t" && afterCursor != ' '
		let line = strpart(line, 0, col - 1)
		let snipLines[-1] .= afterCursor
	else
		let afterCursor = ''
		" For some reason the cursor needs to move one right after this
		if line != '' && col == 1 && &ve != 'all' && &ve != 'onemore'
			let col += 1
		endif
	endif

	call setline(lnum, line.snipLines[0])

	" Autoindent snippet according to previous indentation
	let indent = matchend(line, '^.\{-}\ze\(\S\|$\)') + 1
	call append(lnum, map(snipLines[1:], "'".strpart(line, 0, indent - 1)."'.v:val"))
	if &fen | sil! exe lnum.','.(lnum + len(snipLines) - 1).'foldopen' | endif

	let [g:snipPos, s:snipLen] = s:BuildTabStops(snippet, lnum, col - indent, indent)

	if s:snipLen
		let s:curPos      = 0
		let s:endSnip     = g:snipPos[s:curPos][1]
		let s:endSnipLine = g:snipPos[s:curPos][0]

		call cursor(g:snipPos[s:curPos][0], g:snipPos[s:curPos][1])
		let s:prevLen = [line('$'), col('$')]
		if g:snipPos[s:curPos][2] != -1 | return s:SelectWord() | endif
	else
		unl g:snipPos s:snipLen
		" Place cursor at end of snippet if no tab stop is given
		let newlines = len(snipLines) - 1
		call cursor(lnum + newlines, indent + len(snipLines[-1]) - len(afterCursor)
					\ + (newlines ? 0: col - 1))
	endif
	return ''
endf

fun s:ProcessSnippet(snip)
	let snippet = a:snip
	" Evaluate eval (`...`) expressions.
	" Using a loop here instead of a regex fixes a bug with nested "\=".
	if stridx(snippet, '`') != -1
		while match(snippet, '`.\{-}`') != -1
			let snippet = substitute(snippet, '`.\{-}`',
						\ substitute(eval(matchstr(snippet, '`\zs.\{-}\ze`')),
						\ "\n\\%$", '', ''), '')
		endw
		let snippet = substitute(snippet, "\r", "\n", 'g')
	endif

	" Place all text after a colon in a tab stop after the tab stop
	" (e.g. "${#:foo}" becomes "${:foo}foo").
	" This helps tell the position of the tab stops later.
	let snippet = substitute(snippet, '${\d\+:\(.\{-}\)}', '&\1', 'g')

	" Update the a:snip so that all the $# become the text after
	" the colon in their associated ${#}.
	" (e.g. "${1:foo}" turns all "$1"'s into "foo")
	let i = 1
	while stridx(snippet, '${'.i) != -1
		let s = matchstr(snippet, '${'.i.':\zs.\{-}\ze}')
		if s != ''
			let snippet = substitute(snippet, '$'.i, s.'&', 'g')
		endif
		let i += 1
	endw

	if &et " Expand tabs to spaces if 'expandtab' is set.
		return substitute(snippet, '\t', repeat(' ', &sts ? &sts : &sw), 'g')
	endif
	return snippet
endf

fun s:Count(haystack, needle)
	let counter = 0
	let index = stridx(a:haystack, a:needle)
	while index != -1
		let index = stridx(a:haystack, a:needle, index+1)
		let counter += 1
	endw
	return counter
endf

" This function builds a list of a list of each tab stop in the
" snippet containing:
" 1.) The tab stop's line number.
" 2.) The tab stop's column number
"     (by getting the length of the string between the last "\n" and the
"     tab stop).
" 3.) The length of the text after the colon for the current tab stop
"     (e.g. "${1:foo}" would return 3). If there is no text, -1 is returned.
" 4.) If the "${#:}" construct is given, another list containing all
"     the matches of "$#", to be replaced with the placeholder. This list is
"     composed the same way as the parent; the first item is the line number,
"     and the second is the column.
fun s:BuildTabStops(snip, lnum, col, indent)
	let snipPos = []
	let i = 1
	let withoutVars = substitute(a:snip, '$\d\+', '', 'g')
	while stridx(a:snip, '${'.i) != -1
		let beforeTabStop = matchstr(withoutVars, '^.*\ze${'.i.'\D')
		let withoutOthers = substitute(withoutVars, '${\('.i.'\D\)\@!\d\+.\{-}}', '', 'g')

		let j = i - 1
		call add(snipPos, [0, 0, -1])
		let snipPos[j][0] = a:lnum + s:Count(beforeTabStop, "\n")
		let snipPos[j][1] = a:indent + len(matchstr(withoutOthers, '.*\(\n\|^\)\zs.*\ze${'.i.'\D'))
		if snipPos[j][0] == a:lnum | let snipPos[j][1] += a:col | endif

		" Get all $# matches in another list, if ${#:name} is given
		if stridx(withoutVars, '${'.i.':') != -1
			let snipPos[j][2] = len(matchstr(withoutVars, '${'.i.':\zs.\{-}\ze}'))
			let dots = repeat('.', snipPos[j][2])
			call add(snipPos[j], [])
			let withoutOthers = substitute(a:snip, '${\d\+.\{-}}\|$'.i.'\@!\d\+', '', 'g')
			while match(withoutOthers, '$'.i.'\D') != -1
				let beforeMark = matchstr(withoutOthers, '^.\{-}\ze'.dots.'$'.i.'\D')
				call add(snipPos[j][3], [0, 0])
				let snipPos[j][3][-1][0] = a:lnum + s:Count(beforeMark, "\n")
				let snipPos[j][3][-1][1] = a:indent + (snipPos[j][3][-1][0] > a:lnum
				                           \ ? len(matchstr(beforeMark, '.*\n\zs.*'))
				                           \ : a:col + len(beforeMark))
				let withoutOthers = substitute(withoutOthers, '$'.i.'\ze\D', '', '')
			endw
		endif
		let i += 1
	endw
	return [snipPos, i - 1]
endf

fun snipMate#jumpTabStop()
	if exists('s:update')
		call s:UpdatePlaceholderTabStops()
	else
		call s:UpdateTabStops()
	endif

	let s:curPos += 1
	if s:curPos == s:snipLen
		let sMode = s:endSnip == g:snipPos[s:curPos-1][1]+g:snipPos[s:curPos-1][2]
		call s:RemoveSnippet()
		return sMode ? "\<tab>" : TriggerSnippet()
	endif

	call cursor(g:snipPos[s:curPos][0], g:snipPos[s:curPos][1])

	let s:endSnipLine = g:snipPos[s:curPos][0]
	let s:endSnip     = g:snipPos[s:curPos][1]
	let s:prevLen     = [line('$'), col('$')]

	return g:snipPos[s:curPos][2] == -1 ? '' : s:SelectWord()
endf

fun s:UpdatePlaceholderTabStops()
	let changeLen = s:origWordLen - g:snipPos[s:curPos][2]
	unl s:startSnip s:origWordLen s:update
	if !exists('s:origPos') | return | endif
	" Update tab stops in snippet if text has been added via "$#"
	" (e.g., in "${1:foo}bar$1${2}").
	if changeLen != 0
		let curLine = line('.')

		for pos in g:snipPos[s:curPos + 1:]
			let changed = pos[0] == curLine && pos[1] > s:origSnipPos
			let changedVars = 0
			let endPlaceholder = pos[2] - 1 + pos[1]
			" Subtract changeLen from each tab stop that was after any of
			" the current tab stop's placeholders.
			for [lnum, col] in s:origPos
				if lnum > pos[0] | break | endif
				if pos[0] == lnum
					if pos[1] > col || (pos[2] == -1 && pos[1] == col)
						let changed += 1
					elseif col < endPlaceholder
						let changedVars += 1
					endif
				endif
			endfor
			let pos[1] -= changeLen * changed
			let pos[2] -= changeLen * changedVars " Parse variables within placeholders
                                                  " e.g., "${1:foo} ${2:$1bar}"

			if pos[2] == -1 | continue | endif
			" Do the same to any placeholders in the other tab stops.
			for nPos in pos[3]
				let changed = nPos[0] == curLine && nPos[1] > s:origSnipPos
				for [lnum, col] in s:origPos
					if lnum > nPos[0] | break | endif
					if nPos[0] == lnum && nPos[1] > col
						let changed += 1
					endif
				endfor
				let nPos[1] -= changeLen * changed
			endfor
		endfor
	endif
	unl s:endSnip s:origPos s:origSnipPos
endf

fun s:UpdateTabStops()
	let changeLine = s:endSnipLine - g:snipPos[s:curPos][0]
	let changeCol  = s:endSnip - g:snipPos[s:curPos][1]
	if exists('s:origWordLen')
		let changeCol -= s:origWordLen
		unl s:origWordLen
	endif
	let lnum = g:snipPos[s:curPos][0]
	let col  = g:snipPos[s:curPos][1]
	" Update the line number of all proceeding tab stops if <cr> has
	" been inserted.
	if changeLine != 0
		let changeLine -= 1
		for pos in g:snipPos[s:curPos + 1:]
			if pos[0] >= lnum
				if pos[0] == lnum | let pos[1] += changeCol | endif
				let pos[0] += changeLine
			endif
			if pos[2] == -1 | continue | endif
			for nPos in pos[3]
				if nPos[0] >= lnum
					if nPos[0] == lnum | let nPos[1] += changeCol | endif
					let nPos[0] += changeLine
				endif
			endfor
		endfor
	elseif changeCol != 0
		" Update the column of all proceeding tab stops if text has
		" been inserted/deleted in the current line.
		for pos in g:snipPos[s:curPos + 1:]
			if pos[1] >= col && pos[0] == lnum
				let pos[1] += changeCol
			endif
			if pos[2] == -1 | continue | endif
			for nPos in pos[3]
				if nPos[0] > lnum | break | endif
				if nPos[0] == lnum && nPos[1] >= col
					let nPos[1] += changeCol
				endif
			endfor
		endfor
	endif
endf

fun s:SelectWord()
	let s:origWordLen = g:snipPos[s:curPos][2]
	let s:oldWord     = strpart(getline('.'), g:snipPos[s:curPos][1] - 1,
								\ s:origWordLen)
	let s:prevLen[1] -= s:origWordLen
	if !empty(g:snipPos[s:curPos][3])
		let s:update    = 1
		let s:endSnip   = -1
		let s:startSnip = g:snipPos[s:curPos][1] - 1
	endif
	if !s:origWordLen | return '' | endif
	let l = col('.') != 1 ? 'l' : ''
	if &sel == 'exclusive'
		return "\<esc>".l.'v'.s:origWordLen."l\<c-g>"
	endif
	return s:origWordLen == 1 ? "\<esc>".l.'gh'
							\ : "\<esc>".l.'v'.(s:origWordLen - 1)."l\<c-g>"
endf

" This updates the snippet as you type when text needs to be inserted
" into multiple places (e.g. in "${1:default text}foo$1bar$1",
" "default text" would be highlighted, and if the user types something,
" UpdateChangedSnip() would be called so that the text after "foo" & "bar"
" are updated accordingly)
"
" It also automatically quits the snippet if the cursor is moved out of it
" while in insert mode.
au CursorMovedI * call s:UpdateChangedSnip(0)
au InsertEnter * call s:UpdateChangedSnip(1)
fun s:UpdateChangedSnip(entering)
	if exists('s:update') " If modifying a placeholder
		if !exists('s:origPos') && s:curPos + 1 < s:snipLen
			" Save the old snippet & word length before it's updated
			" s:startSnip must be saved too, in case text is added
			" before the snippet (e.g. in "foo$1${2}bar${1:foo}").
			let s:origSnipPos = s:startSnip
			let s:origPos     = deepcopy(g:snipPos[s:curPos][3])
		endif
		let col = col('.') - 1

		if s:endSnip != -1
			let changeLen = col('$') - s:prevLen[1]
			let s:endSnip += changeLen
		else " When being updated the first time, after leaving select mode
			if a:entering | return | endif
			let s:endSnip = col - 1
		endif

		" If the cursor moves outside the snippet, quit it
		if line('.') != g:snipPos[s:curPos][0] || col < s:startSnip ||
					\ col - 1 > s:endSnip
			unl! s:startSnip s:origWordLen s:origPos s:update
			return s:RemoveSnippet()
		endif

		call s:UpdateVars()
		let s:prevLen[1] = col('$')
	elseif exists('g:snipPos')
		let col        = col('.')
		let lnum       = line('.')
		let changeLine = line('$') - s:prevLen[0]

		if lnum == s:endSnipLine
			let s:endSnip += col('$') - s:prevLen[1]
			let s:prevLen = [line('$'), col('$')]
		endif
		if changeLine != 0
			let s:endSnipLine += changeLine
			let s:endSnip = col
		endif

		" Delete snippet if cursor moves out of it in insert mode
		if (lnum == s:endSnipLine && (col > s:endSnip || col < g:snipPos[s:curPos][1]))
			\ || lnum > s:endSnipLine || lnum < g:snipPos[s:curPos][0]
			call s:RemoveSnippet()
		endif
	endif
endf

" This updates the variables in a snippet when a placeholder has been edited.
" (e.g., each "$1" in "${1:foo} $1bar $1bar")
fun s:UpdateVars()
	let newWordLen = s:endSnip - s:startSnip + 1
	let newWord    = strpart(getline('.'), s:startSnip, newWordLen)
	if newWord == s:oldWord || empty(g:snipPos[s:curPos][3])
		return
	endif

	let changeLen      = g:snipPos[s:curPos][2] - newWordLen
	let curLine        = line('.')
	let startCol       = col('.')
	let oldStartSnip   = s:startSnip
	let updateTabStops = changeLen != 0
	let i              = 0

	for [lnum, col] in g:snipPos[s:curPos][3]
		if updateTabStops
			let start = s:startSnip
			if lnum == curLine && col <= start
				let s:startSnip -= changeLen
				let s:endSnip -= changeLen
			endif
			for nPos in g:snipPos[s:curPos][3][(i):]
				" This list is in ascending order, so quit if we've gone too far.
				if nPos[0] > lnum | break | endif
				if nPos[0] == lnum && nPos[1] > col
					let nPos[1] -= changeLen
				endif
			endfor
			if lnum == curLine && col > start
				let col -= changeLen
				let g:snipPos[s:curPos][3][i][1] = col
			endif
			let i += 1
		endif

		" "Very nomagic" is used here to allow special characters.
		call setline(lnum, substitute(getline(lnum), '\%'.col.'c\V'.
						\ escape(s:oldWord, '\'), escape(newWord, '\&'), ''))
	endfor
	if oldStartSnip != s:startSnip
		call cursor(0, startCol + s:startSnip - oldStartSnip)
	endif

	let s:oldWord = newWord
	let g:snipPos[s:curPos][2] = newWordLen
endf
" vim:noet:sw=4:ts=4:ft=vim