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| class SyncTeXLexer | |
| constructor: (@input) -> | |
| @pointer = 0 | |
| current: => | |
| if @eos() | |
| undefined | |
| else | |
| @input.slice @pointer | |
| eos: => | |
| @pointer >= @input.length | |
| next: => | |
| current = @current() | |
| if @eos() | |
| undefined | |
| else if float = /^(-?\d+\.\d+)/.exec(@current()) | |
| @pointer += float[0].length | |
| { | |
| token: 'float', | |
| value: parseFloat(float[1]) | |
| } | |
| else if int = /^(-?\d+)/.exec(current) | |
| @pointer += int[0].length | |
| { | |
| token: 'int', | |
| value: parseInt(int[0]) | |
| } | |
| else if path = /^(\/[a-zA-Z0-9/_.-]+)/.exec(current) | |
| @pointer += path[0].length | |
| { | |
| token: 'path', | |
| value: path[1] | |
| } | |
| else if eol = /^\n|\r\n/.exec(current) | |
| @pointer += eol[0].length | |
| { | |
| token: 'eol' | |
| } | |
| else if symbol = /^([\[\](){}:!, ])/.exec(current) | |
| @pointer += 1 | |
| { | |
| token: symbol[1] | |
| } | |
| else if name = /^([a-zA-Z$]+)/.exec(current) | |
| @pointer += name[0].length | |
| { | |
| token: 'name', | |
| value: name[1] | |
| } | |
| else | |
| name = /^([^\s]+)/.exec(current) | |
| @pointer += name[0].length | |
| { | |
| token: 'other', | |
| value: name[1] | |
| } | |
| class SyncTeXParser | |
| constructor: (@lexer) -> | |
| @lookahead = undefined | |
| token: => | |
| if not @lookahead? | |
| @lookahead = @lexer.next() | |
| @lookahead | |
| consume: => | |
| @lookahead = undefined | |
| check: (expected) => | |
| { token, value } = @token() | |
| token is expected.token and value is expected.value | |
| accept: (expected) => | |
| if @check(expected) | |
| @consume() | |
| else | |
| console.log expected, @lookahead | |
| throw new Error("#{expected.value} of type #{expected.token} expected but receive #{@lookahead}") | |
| acceptPath: () => | |
| { token, value } = @token() | |
| if token != 'path' | |
| throw new Error("Path expected") | |
| @consume() | |
| value | |
| acceptName: (name) => | |
| @accept {token: 'name', value: name} | |
| acceptFormat: () => | |
| { token, value } = @token() | |
| @consume() | |
| value | |
| acceptSymbol: (sym) => | |
| @accept {token: sym} | |
| acceptInt: => | |
| { token, value } = @token() | |
| if token is 'int' | |
| @consume() | |
| value | |
| else | |
| throw new Error("Integer expected") | |
| acceptFloat: => | |
| { token, value } = @token() | |
| if token is 'float' | |
| @consume() | |
| value | |
| else | |
| throw new Error("Float expected") | |
| inputLines: => | |
| inputs = [] | |
| while @check {token: 'name', value: 'Input'} | |
| input = {} | |
| @acceptName "Input" | |
| @acceptSymbol ":" | |
| input.id = @acceptInt() | |
| @acceptSymbol ":" | |
| input.path = @acceptPath() | |
| @acceptEol() | |
| inputs.push(input) | |
| inputs | |
| checkCoordType: () => | |
| {token, value} = @token() | |
| return token is 'name' && value in ['h', 'g', 'x', 'k', '$', 'r'] | |
| acceptCoordType: () => | |
| {token, value} = @token() | |
| if not @checkCoordType() | |
| throw new Error("CoordType expected") | |
| @consume() | |
| value | |
| acceptCoord: () => | |
| coord = {} | |
| if @checkCoordType() | |
| coord.type = @acceptCoordType() | |
| coord.input = @acceptInt() | |
| @acceptSymbol "," | |
| coord.line = @acceptInt() | |
| @acceptSymbol ":" | |
| coord.left = @acceptInt() | |
| @acceptSymbol "," | |
| coord.bottom = @acceptInt() | |
| if @check {token: ':'} | |
| @acceptSymbol ":" | |
| coord.width = @acceptInt() | |
| if @check {token: ','} | |
| @acceptSymbol "," | |
| coord.height = @acceptInt() | |
| if @check {token: ','} | |
| @acceptSymbol "," | |
| coord.depth = @acceptInt() | |
| coord | |
| acceptBlockLine: () => | |
| block = @acceptCoord() | |
| @acceptEol() | |
| block | |
| acceptVerticalBlock: () => | |
| block = {} | |
| @acceptSymbol "[" | |
| block.coord = @acceptCoord() | |
| @acceptEol() | |
| block.blocks = @blocks() | |
| @acceptSymbol "]" | |
| @acceptEol() | |
| block | |
| acceptHorizontalBlock: () => | |
| block = {} | |
| @acceptSymbol "(" | |
| block.coord = @acceptCoord() | |
| @acceptEol() | |
| block.blocks = @blocks() | |
| @acceptSymbol ")" | |
| @acceptEol() | |
| block | |
| blocks: () => | |
| blocks = [] | |
| while @check({token: '['}) or @check({token: '('}) or @checkCoordType() | |
| if @check {token: '['} | |
| blocks.push(@acceptVerticalBlock()) | |
| else if @check {token: '('} | |
| blocks.push(@acceptHorizontalBlock()) | |
| else if @checkCoordType() | |
| blocks.push(@acceptBlockLine()) | |
| blocks | |
| pages: () => | |
| pages = [] | |
| while @check {token: '{'} | |
| page = {} | |
| @acceptSymbol "{" | |
| page.page = @acceptInt() | |
| @acceptEol() | |
| page.blocks = @blocks() | |
| @acceptSymbol "!" | |
| page.size = @acceptInt() | |
| @acceptEol() | |
| @acceptSymbol "}" | |
| @acceptInt() | |
| @acceptEol() | |
| pages.push(page) | |
| pages | |
| acceptEol: => | |
| @accept {token: 'eol'} | |
| parse: => | |
| file = {} | |
| @preamble(file) | |
| @content(file) | |
| @postamble(file) | |
| file | |
| preamble: (file) => | |
| @acceptName "SyncTeX" | |
| @acceptSymbol " " | |
| @acceptName "Version" | |
| @acceptSymbol ":" | |
| file.version = @acceptInt() | |
| @acceptEol() | |
| file.inputs = @inputLines() | |
| @acceptName "Output" | |
| @acceptSymbol ":" | |
| file.format = @acceptFormat() | |
| @acceptEol() | |
| @acceptName "Magnification" | |
| @acceptSymbol ":" | |
| file.magnification = @acceptInt() | |
| @acceptEol() | |
| @acceptName "Unit" | |
| @acceptSymbol ":" | |
| file.unit = @acceptInt() | |
| @acceptEol() | |
| file.offset = {} | |
| @acceptName "X" | |
| @acceptSymbol " " | |
| @acceptName "Offset" | |
| @acceptSymbol ":" | |
| file.offset.x = @acceptInt() | |
| @acceptEol() | |
| @acceptName "Y" | |
| @acceptSymbol " " | |
| @acceptName "Offset" | |
| @acceptSymbol ":" | |
| file.offset.y = @acceptInt() | |
| @acceptEol() | |
| content: (file) => | |
| file.content = {} | |
| @acceptName "Content" | |
| @acceptSymbol ":" | |
| @acceptEol() | |
| @acceptSymbol "!" | |
| file.content.size = @acceptInt() | |
| @acceptEol() | |
| file.content.pages = @pages() | |
| postamble: (file) => | |
| file.outputs = @inputLines() | |
| @acceptSymbol "!" | |
| @acceptInt() | |
| @acceptEol() | |
| @acceptName "Postamble" | |
| @acceptSymbol ":" | |
| @acceptEol() | |
| @acceptName "Count" | |
| @acceptSymbol ":" | |
| file.count = @acceptInt() | |
| @acceptEol() | |
| @acceptSymbol "!" | |
| @acceptInt() | |
| @acceptEol() | |
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