mirror of
https://github.com/atom/atom.git
synced 2026-01-24 06:18:03 -05:00
540 lines
18 KiB
CoffeeScript
540 lines
18 KiB
CoffeeScript
_ = require 'underscore-plus'
|
|
{CompositeDisposable, Emitter} = require 'event-kit'
|
|
{Point, Range} = require 'text-buffer'
|
|
{ScopeSelector} = require 'first-mate'
|
|
Model = require './model'
|
|
TokenizedLine = require './tokenized-line'
|
|
TokenIterator = require './token-iterator'
|
|
Token = require './token'
|
|
ScopeDescriptor = require './scope-descriptor'
|
|
|
|
module.exports =
|
|
class TokenizedBuffer extends Model
|
|
grammar: null
|
|
currentGrammarScore: null
|
|
buffer: null
|
|
tabLength: null
|
|
tokenizedLines: null
|
|
chunkSize: 50
|
|
invalidRows: null
|
|
visible: false
|
|
configSettings: null
|
|
changeCount: 0
|
|
|
|
@deserialize: (state) ->
|
|
state.buffer = atom.project.bufferForPathSync(state.bufferPath)
|
|
new this(state)
|
|
|
|
constructor: ({@buffer, @tabLength, @ignoreInvisibles, @largeFileMode}) ->
|
|
@emitter = new Emitter
|
|
@disposables = new CompositeDisposable
|
|
@tokenIterator = new TokenIterator
|
|
|
|
@disposables.add atom.grammars.onDidAddGrammar(@grammarAddedOrUpdated)
|
|
@disposables.add atom.grammars.onDidUpdateGrammar(@grammarAddedOrUpdated)
|
|
|
|
@disposables.add @buffer.preemptDidChange (e) => @handleBufferChange(e)
|
|
@disposables.add @buffer.onDidChangePath (@bufferPath) => @reloadGrammar()
|
|
|
|
@reloadGrammar()
|
|
|
|
destroyed: ->
|
|
@disposables.dispose()
|
|
|
|
serialize: ->
|
|
deserializer: 'TokenizedBuffer'
|
|
bufferPath: @buffer.getPath()
|
|
tabLength: @tabLength
|
|
ignoreInvisibles: @ignoreInvisibles
|
|
largeFileMode: @largeFileMode
|
|
|
|
observeGrammar: (callback) ->
|
|
callback(@grammar)
|
|
@onDidChangeGrammar(callback)
|
|
|
|
onDidChangeGrammar: (callback) ->
|
|
@emitter.on 'did-change-grammar', callback
|
|
|
|
onDidChange: (callback) ->
|
|
@emitter.on 'did-change', callback
|
|
|
|
onDidTokenize: (callback) ->
|
|
@emitter.on 'did-tokenize', callback
|
|
|
|
grammarAddedOrUpdated: (grammar) =>
|
|
if grammar.injectionSelector?
|
|
@retokenizeLines() if @hasTokenForSelector(grammar.injectionSelector)
|
|
else
|
|
newScore = atom.grammars.getGrammarScore(grammar, @buffer.getPath(), @getGrammarSelectionContent())
|
|
@setGrammar(grammar, newScore) if newScore > @currentGrammarScore
|
|
|
|
setGrammar: (grammar, score) ->
|
|
return unless grammar? and grammar isnt @grammar
|
|
|
|
@grammar = grammar
|
|
@rootScopeDescriptor = new ScopeDescriptor(scopes: [@grammar.scopeName])
|
|
@currentGrammarScore = score ? atom.grammars.getGrammarScore(grammar, @buffer.getPath(), @getGrammarSelectionContent())
|
|
|
|
@grammarUpdateDisposable?.dispose()
|
|
@grammarUpdateDisposable = @grammar.onDidUpdate => @retokenizeLines()
|
|
@disposables.add(@grammarUpdateDisposable)
|
|
|
|
scopeOptions = {scope: @rootScopeDescriptor}
|
|
@configSettings =
|
|
tabLength: atom.config.get('editor.tabLength', scopeOptions)
|
|
invisibles: atom.config.get('editor.invisibles', scopeOptions)
|
|
showInvisibles: atom.config.get('editor.showInvisibles', scopeOptions)
|
|
|
|
if @configSubscriptions?
|
|
@configSubscriptions.dispose()
|
|
@disposables.remove(@configSubscriptions)
|
|
@configSubscriptions = new CompositeDisposable
|
|
@configSubscriptions.add atom.config.onDidChange 'editor.tabLength', scopeOptions, ({newValue}) =>
|
|
@configSettings.tabLength = newValue
|
|
@retokenizeLines()
|
|
['invisibles', 'showInvisibles'].forEach (key) =>
|
|
@configSubscriptions.add atom.config.onDidChange "editor.#{key}", scopeOptions, ({newValue}) =>
|
|
oldInvisibles = @getInvisiblesToShow()
|
|
@configSettings[key] = newValue
|
|
@retokenizeLines() unless _.isEqual(@getInvisiblesToShow(), oldInvisibles)
|
|
@disposables.add(@configSubscriptions)
|
|
|
|
@retokenizeLines()
|
|
atom.packages.triggerActivationHook("#{grammar.packageName}:grammar-used")
|
|
@emitter.emit 'did-change-grammar', grammar
|
|
|
|
getGrammarSelectionContent: ->
|
|
@buffer.getTextInRange([[0, 0], [10, 0]])
|
|
|
|
reloadGrammar: ->
|
|
if grammar = atom.grammars.selectGrammar(@buffer.getPath(), @getGrammarSelectionContent())
|
|
@setGrammar(grammar)
|
|
else
|
|
throw new Error("No grammar found for path: #{path}")
|
|
|
|
hasTokenForSelector: (selector) ->
|
|
for tokenizedLine in @tokenizedLines when tokenizedLine?
|
|
for token in tokenizedLine.tokens
|
|
return true if selector.matches(token.scopes)
|
|
false
|
|
|
|
retokenizeLines: ->
|
|
lastRow = @buffer.getLastRow()
|
|
@tokenizedLines = new Array(lastRow + 1)
|
|
@invalidRows = []
|
|
@invalidateRow(0)
|
|
@fullyTokenized = false
|
|
event = {start: 0, end: lastRow, delta: 0}
|
|
@emitter.emit 'did-change', event
|
|
|
|
setVisible: (@visible) ->
|
|
@tokenizeInBackground() if @visible
|
|
|
|
getTabLength: ->
|
|
@tabLength ? @configSettings.tabLength
|
|
|
|
setTabLength: (tabLength) ->
|
|
return if tabLength is @tabLength
|
|
|
|
@tabLength = tabLength
|
|
@retokenizeLines()
|
|
|
|
setIgnoreInvisibles: (ignoreInvisibles) ->
|
|
if ignoreInvisibles isnt @ignoreInvisibles
|
|
@ignoreInvisibles = ignoreInvisibles
|
|
if @configSettings.showInvisibles and @configSettings.invisibles?
|
|
@retokenizeLines()
|
|
|
|
tokenizeInBackground: ->
|
|
return if not @visible or @pendingChunk or not @isAlive()
|
|
|
|
@pendingChunk = true
|
|
_.defer =>
|
|
@pendingChunk = false
|
|
@tokenizeNextChunk() if @isAlive() and @buffer.isAlive()
|
|
|
|
tokenizeNextChunk: ->
|
|
# Short circuit null grammar which can just use the placeholder tokens
|
|
if @grammar is atom.grammars.nullGrammar and @firstInvalidRow()?
|
|
@invalidRows = []
|
|
@markTokenizationComplete()
|
|
return
|
|
|
|
rowsRemaining = @chunkSize
|
|
|
|
while @firstInvalidRow()? and rowsRemaining > 0
|
|
startRow = @invalidRows.shift()
|
|
lastRow = @getLastRow()
|
|
continue if startRow > lastRow
|
|
|
|
row = startRow
|
|
loop
|
|
previousStack = @stackForRow(row)
|
|
@tokenizedLines[row] = @buildTokenizedLineForRow(row, @stackForRow(row - 1), @openScopesForRow(row))
|
|
if --rowsRemaining is 0
|
|
filledRegion = false
|
|
endRow = row
|
|
break
|
|
if row is lastRow or _.isEqual(@stackForRow(row), previousStack)
|
|
filledRegion = true
|
|
endRow = row
|
|
break
|
|
row++
|
|
|
|
@validateRow(endRow)
|
|
@invalidateRow(endRow + 1) unless filledRegion
|
|
|
|
[startRow, endRow] = @updateFoldableStatus(startRow, endRow)
|
|
|
|
event = {start: startRow, end: endRow, delta: 0}
|
|
@emitter.emit 'did-change', event
|
|
|
|
if @firstInvalidRow()?
|
|
@tokenizeInBackground()
|
|
else
|
|
@markTokenizationComplete()
|
|
|
|
markTokenizationComplete: ->
|
|
unless @fullyTokenized
|
|
@emitter.emit 'did-tokenize'
|
|
@fullyTokenized = true
|
|
|
|
firstInvalidRow: ->
|
|
@invalidRows[0]
|
|
|
|
validateRow: (row) ->
|
|
@invalidRows.shift() while @invalidRows[0] <= row
|
|
return
|
|
|
|
invalidateRow: (row) ->
|
|
return if @largeFileMode
|
|
|
|
@invalidRows.push(row)
|
|
@invalidRows.sort (a, b) -> a - b
|
|
@tokenizeInBackground()
|
|
|
|
updateInvalidRows: (start, end, delta) ->
|
|
@invalidRows = @invalidRows.map (row) ->
|
|
if row < start
|
|
row
|
|
else if start <= row <= end
|
|
end + delta + 1
|
|
else if row > end
|
|
row + delta
|
|
|
|
handleBufferChange: (e) ->
|
|
@changeCount = @buffer.changeCount
|
|
|
|
{oldRange, newRange} = e
|
|
start = oldRange.start.row
|
|
end = oldRange.end.row
|
|
delta = newRange.end.row - oldRange.end.row
|
|
|
|
@updateInvalidRows(start, end, delta)
|
|
previousEndStack = @stackForRow(end) # used in spill detection below
|
|
if @largeFileMode
|
|
newTokenizedLines = @buildPlaceholderTokenizedLinesForRows(start, end + delta)
|
|
else
|
|
newTokenizedLines = @buildTokenizedLinesForRows(start, end + delta, @stackForRow(start - 1), @openScopesForRow(start))
|
|
_.spliceWithArray(@tokenizedLines, start, end - start + 1, newTokenizedLines)
|
|
|
|
start = @retokenizeWhitespaceRowsIfIndentLevelChanged(start - 1, -1)
|
|
end = @retokenizeWhitespaceRowsIfIndentLevelChanged(newRange.end.row + 1, 1) - delta
|
|
|
|
newEndStack = @stackForRow(end + delta)
|
|
if newEndStack and not _.isEqual(newEndStack, previousEndStack)
|
|
@invalidateRow(end + delta + 1)
|
|
|
|
[start, end] = @updateFoldableStatus(start, end + delta)
|
|
end -= delta
|
|
|
|
event = {start, end, delta, bufferChange: e}
|
|
@emitter.emit 'did-change', event
|
|
|
|
retokenizeWhitespaceRowsIfIndentLevelChanged: (row, increment) ->
|
|
line = @tokenizedLineForRow(row)
|
|
if line?.isOnlyWhitespace() and @indentLevelForRow(row) isnt line.indentLevel
|
|
while line?.isOnlyWhitespace()
|
|
@tokenizedLines[row] = @buildTokenizedLineForRow(row, @stackForRow(row - 1), @openScopesForRow(row))
|
|
row += increment
|
|
line = @tokenizedLineForRow(row)
|
|
|
|
row - increment
|
|
|
|
updateFoldableStatus: (startRow, endRow) ->
|
|
return [startRow, endRow] if @largeFileMode
|
|
|
|
scanStartRow = @buffer.previousNonBlankRow(startRow) ? startRow
|
|
scanStartRow-- while scanStartRow > 0 and @tokenizedLineForRow(scanStartRow).isComment()
|
|
scanEndRow = @buffer.nextNonBlankRow(endRow) ? endRow
|
|
|
|
for row in [scanStartRow..scanEndRow] by 1
|
|
foldable = @isFoldableAtRow(row)
|
|
line = @tokenizedLineForRow(row)
|
|
unless line.foldable is foldable
|
|
line.foldable = foldable
|
|
startRow = Math.min(startRow, row)
|
|
endRow = Math.max(endRow, row)
|
|
|
|
[startRow, endRow]
|
|
|
|
isFoldableAtRow: (row) ->
|
|
if @largeFileMode
|
|
false
|
|
else
|
|
@isFoldableCodeAtRow(row) or @isFoldableCommentAtRow(row)
|
|
|
|
# Returns a {Boolean} indicating whether the given buffer row starts
|
|
# a a foldable row range due to the code's indentation patterns.
|
|
isFoldableCodeAtRow: (row) ->
|
|
# Investigating an exception that's occurring here due to the line being
|
|
# undefined. This should paper over the problem but we want to figure out
|
|
# what is happening:
|
|
tokenizedLine = @tokenizedLineForRow(row)
|
|
atom.assert tokenizedLine?, "TokenizedLine is undefined", (error) =>
|
|
error.metadata = {
|
|
row: row
|
|
rowCount: @tokenizedLines.length
|
|
tokenizedBufferChangeCount: @changeCount
|
|
bufferChangeCount: @buffer.changeCount
|
|
}
|
|
|
|
return false unless tokenizedLine?
|
|
|
|
return false if @buffer.isRowBlank(row) or tokenizedLine.isComment()
|
|
nextRow = @buffer.nextNonBlankRow(row)
|
|
return false unless nextRow?
|
|
|
|
@indentLevelForRow(nextRow) > @indentLevelForRow(row)
|
|
|
|
isFoldableCommentAtRow: (row) ->
|
|
previousRow = row - 1
|
|
nextRow = row + 1
|
|
return false if nextRow > @buffer.getLastRow()
|
|
|
|
(row is 0 or not @tokenizedLineForRow(previousRow).isComment()) and
|
|
@tokenizedLineForRow(row).isComment() and
|
|
@tokenizedLineForRow(nextRow).isComment()
|
|
|
|
buildTokenizedLinesForRows: (startRow, endRow, startingStack, startingopenScopes) ->
|
|
ruleStack = startingStack
|
|
openScopes = startingopenScopes
|
|
stopTokenizingAt = startRow + @chunkSize
|
|
tokenizedLines = for row in [startRow..endRow]
|
|
if (ruleStack or row is 0) and row < stopTokenizingAt
|
|
tokenizedLine = @buildTokenizedLineForRow(row, ruleStack, openScopes)
|
|
ruleStack = tokenizedLine.ruleStack
|
|
openScopes = @scopesFromTags(openScopes, tokenizedLine.tags)
|
|
else
|
|
tokenizedLine = @buildPlaceholderTokenizedLineForRow(row, openScopes)
|
|
tokenizedLine
|
|
|
|
if endRow >= stopTokenizingAt
|
|
@invalidateRow(stopTokenizingAt)
|
|
@tokenizeInBackground()
|
|
|
|
tokenizedLines
|
|
|
|
buildPlaceholderTokenizedLinesForRows: (startRow, endRow) ->
|
|
@buildPlaceholderTokenizedLineForRow(row) for row in [startRow..endRow] by 1
|
|
|
|
buildPlaceholderTokenizedLineForRow: (row) ->
|
|
openScopes = [@grammar.startIdForScope(@grammar.scopeName)]
|
|
text = @buffer.lineForRow(row)
|
|
tags = [text.length]
|
|
tabLength = @getTabLength()
|
|
indentLevel = @indentLevelForRow(row)
|
|
lineEnding = @buffer.lineEndingForRow(row)
|
|
new TokenizedLine({openScopes, text, tags, tabLength, indentLevel, invisibles: @getInvisiblesToShow(), lineEnding, @tokenIterator})
|
|
|
|
buildTokenizedLineForRow: (row, ruleStack, openScopes) ->
|
|
@buildTokenizedLineForRowWithText(row, @buffer.lineForRow(row), ruleStack, openScopes)
|
|
|
|
buildTokenizedLineForRowWithText: (row, text, ruleStack = @stackForRow(row - 1), openScopes = @openScopesForRow(row)) ->
|
|
lineEnding = @buffer.lineEndingForRow(row)
|
|
tabLength = @getTabLength()
|
|
indentLevel = @indentLevelForRow(row)
|
|
{tags, ruleStack} = @grammar.tokenizeLine(text, ruleStack, row is 0, false)
|
|
new TokenizedLine({openScopes, text, tags, ruleStack, tabLength, lineEnding, indentLevel, invisibles: @getInvisiblesToShow(), @tokenIterator})
|
|
|
|
getInvisiblesToShow: ->
|
|
if @configSettings.showInvisibles and not @ignoreInvisibles
|
|
@configSettings.invisibles
|
|
else
|
|
null
|
|
|
|
tokenizedLineForRow: (bufferRow) ->
|
|
if 0 <= bufferRow < @tokenizedLines.length
|
|
@tokenizedLines[bufferRow] ?= @buildPlaceholderTokenizedLineForRow(bufferRow)
|
|
|
|
tokenizedLinesForRows: (startRow, endRow) ->
|
|
for row in [startRow..endRow] by 1
|
|
@tokenizedLineForRow(row)
|
|
|
|
stackForRow: (bufferRow) ->
|
|
@tokenizedLines[bufferRow]?.ruleStack
|
|
|
|
openScopesForRow: (bufferRow) ->
|
|
if bufferRow > 0
|
|
precedingLine = @tokenizedLineForRow(bufferRow - 1)
|
|
@scopesFromTags(precedingLine.openScopes, precedingLine.tags)
|
|
else
|
|
[]
|
|
|
|
scopesFromTags: (startingScopes, tags) ->
|
|
scopes = startingScopes.slice()
|
|
for tag in tags when tag < 0
|
|
if (tag % 2) is -1
|
|
scopes.push(tag)
|
|
else
|
|
matchingStartTag = tag + 1
|
|
loop
|
|
break if scopes.pop() is matchingStartTag
|
|
if scopes.length is 0
|
|
atom.assert false, "Encountered an unmatched scope end tag.", (error) =>
|
|
error.metadata = {
|
|
grammarScopeName: @grammar.scopeName
|
|
unmatchedEndTag: @grammar.scopeForId(tag)
|
|
}
|
|
path = require 'path'
|
|
error.privateMetadataDescription = "The contents of `#{path.basename(@buffer.getPath())}`"
|
|
error.privateMetadata = {
|
|
filePath: @buffer.getPath()
|
|
fileContents: @buffer.getText()
|
|
}
|
|
scopes
|
|
|
|
indentLevelForRow: (bufferRow) ->
|
|
line = @buffer.lineForRow(bufferRow)
|
|
indentLevel = 0
|
|
|
|
if line is ''
|
|
nextRow = bufferRow + 1
|
|
lineCount = @getLineCount()
|
|
while nextRow < lineCount
|
|
nextLine = @buffer.lineForRow(nextRow)
|
|
unless nextLine is ''
|
|
indentLevel = Math.ceil(@indentLevelForLine(nextLine))
|
|
break
|
|
nextRow++
|
|
|
|
previousRow = bufferRow - 1
|
|
while previousRow >= 0
|
|
previousLine = @buffer.lineForRow(previousRow)
|
|
unless previousLine is ''
|
|
indentLevel = Math.max(Math.ceil(@indentLevelForLine(previousLine)), indentLevel)
|
|
break
|
|
previousRow--
|
|
|
|
indentLevel
|
|
else
|
|
@indentLevelForLine(line)
|
|
|
|
indentLevelForLine: (line) ->
|
|
if match = line.match(/^[\t ]+/)
|
|
indentLength = 0
|
|
for character in match[0]
|
|
if character is '\t'
|
|
indentLength += @getTabLength() - (indentLength % @getTabLength())
|
|
else
|
|
indentLength++
|
|
|
|
indentLength / @getTabLength()
|
|
else
|
|
0
|
|
|
|
scopeDescriptorForPosition: (position) ->
|
|
{row, column} = @buffer.clipPosition(Point.fromObject(position))
|
|
|
|
iterator = @tokenizedLineForRow(row).getTokenIterator()
|
|
while iterator.next()
|
|
if iterator.getBufferEnd() > column
|
|
scopes = iterator.getScopes()
|
|
break
|
|
|
|
# rebuild scope of last token if we iterated off the end
|
|
unless scopes?
|
|
scopes = iterator.getScopes()
|
|
scopes.push(iterator.getScopeEnds().reverse()...)
|
|
|
|
new ScopeDescriptor({scopes})
|
|
|
|
tokenForPosition: (position) ->
|
|
{row, column} = Point.fromObject(position)
|
|
@tokenizedLineForRow(row).tokenAtBufferColumn(column)
|
|
|
|
tokenStartPositionForPosition: (position) ->
|
|
{row, column} = Point.fromObject(position)
|
|
column = @tokenizedLineForRow(row).tokenStartColumnForBufferColumn(column)
|
|
new Point(row, column)
|
|
|
|
bufferRangeForScopeAtPosition: (selector, position) ->
|
|
position = Point.fromObject(position)
|
|
|
|
{openScopes, tags} = @tokenizedLineForRow(position.row)
|
|
scopes = openScopes.map (tag) -> atom.grammars.scopeForId(tag)
|
|
|
|
startColumn = 0
|
|
for tag, tokenIndex in tags
|
|
if tag < 0
|
|
if tag % 2 is -1
|
|
scopes.push(atom.grammars.scopeForId(tag))
|
|
else
|
|
scopes.pop()
|
|
else
|
|
endColumn = startColumn + tag
|
|
if endColumn >= position.column
|
|
break
|
|
else
|
|
startColumn = endColumn
|
|
|
|
|
|
return unless selectorMatchesAnyScope(selector, scopes)
|
|
|
|
startScopes = scopes.slice()
|
|
for startTokenIndex in [(tokenIndex - 1)..0] by -1
|
|
tag = tags[startTokenIndex]
|
|
if tag < 0
|
|
if tag % 2 is -1
|
|
startScopes.pop()
|
|
else
|
|
startScopes.push(atom.grammars.scopeForId(tag))
|
|
else
|
|
break unless selectorMatchesAnyScope(selector, startScopes)
|
|
startColumn -= tag
|
|
|
|
endScopes = scopes.slice()
|
|
for endTokenIndex in [(tokenIndex + 1)...tags.length] by 1
|
|
tag = tags[endTokenIndex]
|
|
if tag < 0
|
|
if tag % 2 is -1
|
|
endScopes.push(atom.grammars.scopeForId(tag))
|
|
else
|
|
endScopes.pop()
|
|
else
|
|
break unless selectorMatchesAnyScope(selector, endScopes)
|
|
endColumn += tag
|
|
|
|
new Range(new Point(position.row, startColumn), new Point(position.row, endColumn))
|
|
|
|
# Gets the row number of the last line.
|
|
#
|
|
# Returns a {Number}.
|
|
getLastRow: ->
|
|
@buffer.getLastRow()
|
|
|
|
getLineCount: ->
|
|
@buffer.getLineCount()
|
|
|
|
logLines: (start=0, end=@buffer.getLastRow()) ->
|
|
for row in [start..end]
|
|
line = @tokenizedLineForRow(row).text
|
|
console.log row, line, line.length
|
|
return
|
|
|
|
selectorMatchesAnyScope = (selector, scopes) ->
|
|
targetClasses = selector.replace(/^\./, '').split('.')
|
|
_.any scopes, (scope) ->
|
|
scopeClasses = scope.split('.')
|
|
_.isSubset(targetClasses, scopeClasses)
|