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Allow begin/end rules with back-references to be nested

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Nathan Sobo
2012-09-26 12:10:00 -06:00
parent 9c8d897317
commit 2dbba203a0
2 changed files with 47 additions and 33 deletions
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65
src/app/text-mate-grammar.coffee
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@@ -69,10 +69,10 @@ class Rule
patterns: null
createEndPattern: null
constructor: (@grammar, {@scopeName, patterns, @createEndPattern}) ->
constructor: (@grammar, {@scopeName, patterns, @endPattern}) ->
patterns ?= []
@patterns = []
@patterns.push((patterns.map (pattern) => new Pattern(grammar, pattern))...)
@patterns = patterns.map (pattern) => new Pattern(grammar, pattern)
@patterns.unshift(@endPattern) if @endPattern and !@endPattern.hasBackReferences
getIncludedPatterns: (included=[]) ->
return [] if _.include(included, this)
@@ -95,12 +95,14 @@ class Rule
nextTokens = patterns[index].handleMatch(stack, line, captureIndices)
{ nextTokens, tokensStartPosition: firstCaptureStart, tokensEndPosition: firstCaptureEnd }
addEndPattern: (backReferences) ->
endPattern = @createEndPattern(backReferences)
@patterns.unshift(endPattern)
removeEndPattern: ->
@patterns.shift()
getRuleToPush: (line, beginPatternCaptureIndices) ->
if @endPattern.hasBackReferences
rule = new Rule(@grammar, {@scopeName})
rule.endPattern = @endPattern.resolveBackReferences(line, beginPatternCaptureIndices)
rule.patterns = [rule.endPattern, @patterns...]
rule
else
this
class Pattern
grammar: null
@@ -111,20 +113,33 @@ class Pattern
captures: null
backReferences: null
constructor: (@grammar, { name, contentName, @include, match, begin, end, captures, beginCaptures, endCaptures, patterns, @popRule}) ->
constructor: (@grammar, { name, contentName, @include, match, begin, end, captures, beginCaptures, endCaptures, patterns, @popRule, hasBackReferences}) ->
@scopeName = name ? contentName # TODO: We need special treatment of contentName
if match
@regex = new OnigRegExp(match)
if @hasBackReferences = hasBackReferences ? /\\\d+/.test(match)
@match = match
else
@regex = new OnigRegExp(match)
@captures = captures
else if begin
@regex = new OnigRegExp(begin)
@captures = beginCaptures ? captures
createEndPattern = (backReferences) ->
end = end.replace /(\\\d+)/g, (match) ->
index = parseInt(match[1..])
_.escapeRegExp(backReferences[index] ? "\\#{index}")
new Pattern(@grammar, { match: end, captures: endCaptures ? captures, popRule: true})
@pushRule = new Rule(@grammar, { @scopeName, patterns, createEndPattern })
endPattern = new Pattern(@grammar, { match: end, captures: endCaptures ? captures, popRule: true})
@pushRule = new Rule(@grammar, { @scopeName, patterns, endPattern })
resolveBackReferences: (line, beginCaptureIndices) ->
beginCaptures = []
for i in [0...beginCaptureIndices.length] by 3
start = beginCaptureIndices[i + 1]
end = beginCaptureIndices[i + 2]
beginCaptures.push line[start...end]
resolvedMatch = @match.replace /\\\d+/g, (match) ->
index = parseInt(match[1..])
_.escapeRegExp(beginCaptures[index] ? "\\#{index}")
new Pattern(@grammar, { hasBackReferences: false, match: resolvedMatch, @captures, @popRule })
getIncludedPatterns: (included) ->
if @include
@@ -147,25 +162,13 @@ class Pattern
tokens = null
else
tokens = [{ value: line[start...end], scopes: scopes }]
if @pushRule
@pushRule.addEndPattern(@backreferencesForCaptureIndices(line, captureIndices))
stack.push(@pushRule)
stack.push(@pushRule.getRuleToPush(line, captureIndices))
else if @popRule
rule = stack.pop()
rule.removeEndPattern()
stack.pop()
tokens
backreferencesForCaptureIndices: (line, captureIndices) ->
backReferences = []
for i in [0...captureIndices.length] by 3
start = captureIndices[i + 1]
end = captureIndices[i + 2]
backReferences.push line[start...end]
backReferences
getTokensForCaptureIndices: (line, captureIndices, scopes) ->
[parentCaptureIndex, parentCaptureStart, parentCaptureEnd] = shiftCapture(captureIndices)