291 lines
9.1 KiB
Lua
291 lines
9.1 KiB
Lua
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if not modules then modules = { } end modules ['pret-pas'] = {
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version = 1.0,
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comment = "custom pretty printer for Pascal code",
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author = "Stefan Müller, Chemnitz DE",
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copyright = "Stefan Müller",
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license = "see context related readme files"
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}
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local utf = unicode.utf8
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local utfcharacters, utfvalues = string.utfcharacters, string.utfvalues
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local utfbyte, utffind = utf.byte, utf.find
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local byte, sub, find, match = string.byte, string.sub, string.find, string.match
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local texsprint, texwrite = tex.sprint, tex.write
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local ctxcatcodes = tex.ctxcatcodes
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local buffers = buffers
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local changestate, finishstate = buffers.changestate, buffers.finishstate
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local visualizer = buffers.newvisualizer("pas")
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-- reserved words taken from http://www.freepascal.org/docs-html/ref/refse3.html
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visualizer.reservedwords = {
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-- Turbo Pascal
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"absolute", "and", "array", "asm", "begin", "case", "const", "constructor",
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"destructor", "div", "do", "downto", "else", "end", "file", "for",
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"function", "goto", "if", "implementation", "in", "inherited", "inline",
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"interface", "label", "mod", "nil", "not", "object", "of", "on", "operator",
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"or", "packed", "procedure", "program", "record", "reintroduce", "repeat",
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"self", "set", "shl", "shr", "string", "then", "to", "type", "unit",
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"until", "uses", "var", "while", "with", "xor",
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-- Free Pascal
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-- these are not bold type (keeping them, just in case)
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-- "dispose", "exit", "false", "new", "true",
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-- Object Pascal
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"as", "class", "dispinterface", "except", "exports", "finalization",
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"finally", "initialization", "inline", "is", "library", "on", "out",
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"packed", "property", "raise", "resourcestring", "threadvar", "try",
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-- Modifiers
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-- some of these are only bold in specific places (this is deliberately
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-- ignored)
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"absolute", "abstract", "alias", "assembler", "cdecl", "cppdecl", "default",
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"export", "external", "far", "far16", "forward", "index", "local", "name",
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"near", "nostackframe", "oldfpccall", "override", "pascal", "private",
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"protected", "public", "published", "read", "register", "reintroduce",
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"safecall", "softfloat", "stdcall", "virtual", "write"
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}
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local known_words = { }
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for k,v in next, visualizer.reservedwords do
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known_words[v] = k
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end
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local colors = {
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"prettyone", -- red
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"prettytwo", -- green
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"prettythree", -- blue
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"prettyfour", -- yellow
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}
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local states = {
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['"']=1, ["'"]=1, ["[["] = 1, ["]]"] = 1,
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['+']=1, ['-']=1, ['*']=1, ['/']=1, ['%']=1, ['^']=1,
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["("] = 3, [")"] = 3, ["["] = 3, ["]"] = 3,
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['--']=4,
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}
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local function flush_pas_word(word)
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if word then
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local id = known_words[word]
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if id then
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tex.sprint(tex.ctxcatcodes,"\{\\bf ")
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tex.write(word)
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tex.sprint(tex.ctxcatcodes,"\}")
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else
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tex.write(word)
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end
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end
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end
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local incomment, inlongstring = false, false
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local incompdirec, inasm = false, false
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function visualizer.reset()
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incomment, inlongstring = false, false
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incompdirec, inasm = false, false
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end
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local function written(state,c,i)
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if c == " " then
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state = finishstate(state)
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texsprint(ctxcatcodes,"\\obs")
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elseif c == "\t" then
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state = finishstate(state)
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texsprint(ctxcatcodes,"\\obs")
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if buffers.visualizers.enabletab then
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texsprint(ctxcatcodes,rep("\\obs ",i%buffers.visualizers.tablength))
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end
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else
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texwrite(c)
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end
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return state, 0
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end
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function visualizer.flush_line(str, nested)
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--[[
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buffers.currentcolors = colors
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local identifier = nil
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for c in string.utfcharacters(str) do
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if string.string.find(c, "^[%a%_]$") then
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if identifier then
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identifier = identifier .. c
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else
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identifier = c
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end
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elseif string.string.find(c, "^[%d]$")
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if identifier and #identifier > 1 then
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identifier = identifier .. c
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end
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elseif
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--flush_pas_word(identifier)
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identifier = nil
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end
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tex.write("p")
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end
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--flush_pas_word(identifier)
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identifier = nil
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]]
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local state, instr, inesc, word = 0, false, false, nil
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buffers.currentcolors = colors
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local code, comment = match(str,"^(.-)%-%-%[%[(.*)$")
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if comment then
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-- process the code and then flush the comment
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elseif incomment then
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comment, code = match(str,"^(.-)%]%](.*)$")
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if comment then
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-- flush the comment and then process the code
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for c in utfcharacters(comment) do
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if c == " " then texsprint(ctxcatcodes,"\\obs") else texwrite(c) end
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end
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state = changestate(states['--'], state)
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texwrite("]]")
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state = finishstate(state)
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incomment = false
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else
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for c in utfcharacters(str) do
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if c == " " then texsprint(ctxcatcodes,"\\obs") else texwrite(c) end
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end
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end
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comment = nil
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else
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code = str
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end
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if code and code ~= "" then
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local pre, post = match(code,"^(.-)%-%-(.*)$")
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if pre then
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code = pre
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end
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local p, s, i = nil, nil, 0
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for c in utfcharacters(code) do
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i = i + 1
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if instr then
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if p then
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texwrite(p)
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p = nil
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end
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if c == s then
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if inesc then
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texwrite(c)
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inesc = false
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else
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state = changestate(states[c],state)
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instr = false
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texwrite(c)
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state = finishstate(state)
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end
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s = nil
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else
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if c == "\\" then
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inesc = not inesc
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else
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inesc = false
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end
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state, i = written(state,c,i)
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end
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elseif c == "[" then
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if word then
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texwrite(word)
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word = nil
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end
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if p == "[" then
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inlongstring = true
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state = changestate(states["[["],state)
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texwrite(p,c)
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state = finishstate(state)
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p = nil
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else
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if p then
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state, i = written(state,p,i)
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end
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p = c
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end
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elseif c == "]" then
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if word then
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texwrite(word)
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word = nil
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end
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if p == "]" then
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inlongstring = false
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state = changestate(states["]]"],state)
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texwrite(p,c)
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state = finishstate(state)
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p = nil
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else
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if p then
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state, i = written(state,p,i)
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end
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p = c
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end
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else
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if p then
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state = changestate(states[p],state)
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texwrite(p)
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state = finishstate(state)
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p = nil
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end
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if c == " " or c == "\t" then
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if word then
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flush_pas_word(word)
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word = nil
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end
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state, i = written(state,c,i)
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elseif inlongstring then
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state, i = written(state,c,i)
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elseif c == '"' or c == "'" then
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if word then
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flush_pas_word(word)
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word = nil
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end
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instr = true
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state = changestate(states[c],state)
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state, i = written(state,c,i)
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state = finishstate(state)
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s = c
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elseif find(c,"^[%a]$") then
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state = finishstate(state)
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if word then word = word .. c else word = c end
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elseif word and (#word > 1) and find(c,"^[%d%.%_]$") then
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if word then word = word .. c else word = c end
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else
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flush_pas_word(word)
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word = nil
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state = changestate(states[c],state)
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texwrite(c)
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instr = (c == '"')
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end
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end
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end
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if p then
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texwrite(p)
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-- state, i = written(state,p,i)
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p = nil
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end
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flush_pas_word(word)
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if post then
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state = changestate(states['--'], state)
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texwrite("--")
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state = finishstate(state)
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for c in utfcharacters(post) do
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state, i = written(state,c,i)
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end
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end
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end
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if comment then
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incomment = true
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state = changestate(states['--'], state)
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texwrite("[[")
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state = finishstate(state)
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-- texwrite(comment) -- maybe also split and
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for c in utfcharacters(comment) do
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state, i = written(state,c,i)
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end
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end
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state = finishstate(state)
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end
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