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--[[
-- ltextfile-drip
-- Output a text file as a sequence of symbols (sentences)
-- author Martin Peach 20120913
--]]
-- Pd class
local LTextFileDrip = pd.Class:new():register("ltextfile-drip")
local file ourTextFile = nil
local words = {}
local wordIndex = 0
local playbackIndex = 0
local ourSentence, ourRemainingLine = nil
local ourLine = nil
function LTextFileDrip:initialize(name, atoms)
--pd.post("LTextFileDrip:initialize-> name is " .. name);
--pd.post("number of atoms is ".. #atoms)
--for i,v in ipairs(atoms) do
-- pd.post(i .. " = " .. v)
--end
if #atoms > 0 then self:openOurTextFile(atoms[1]) end
if ourTextFile == nil then pd.post("LTextFileDrip:initialize: unable to open " .. atoms[1]) end
self.inlets = 1
self.outlets = 3
return true
end
-- LTextFileDrip:openOurTextFile: open a text file using name as a path
function LTextFileDrip:openOurTextFile(name)
if ourTextFile ~= nil then
--pd.post("LTextFileDrip:openOurTextFile: closing old file")
ourTextFile:close()
ourTextFile = nil
end
--pd.post("LTextFileDrip:openOurTextFile ( " .. name .. " )")
ourTextFile = io.open(name)
if ourTextFile == nil then
pd.post("LTextFileDrip:openOurTextFile: Unable to open " .. name)
end
ourRemainingLine = nil
end
function LTextFileDrip:rewindOurTextFile()
-- pd.post("LTextFileDrip:rewind")
if ourTextFile == nil then
pd.post("LTextFileDrip:rewindOurTextFile: no open file")
else
ourTextFile:seek("set") --sets the position to the beginning of the file (and returns 0)
wordIndex = 0
playbackIndex = 0
end
end
-- LTextFileDrip:drip: accumulate a line of words from ourTextFile and output them as symbols, one per bang
function LTextFileDrip:drip()
local ourPunc
local repeatCount = 0
if ourTextFile == nil then
pd.post("LTextFileDrip:drip: no open file")
return
end
-- if wordIndex == 0 then -- read another line
repeat
repeatCount = repeatCount + 1
--pd.post("repeat number " .. repeatCount)
if ourRemainingLine == nil then
--pd.post ("1> ourRemainingLine is nil")
ourLine = ourTextFile:read()
if ourLine == nil then
self:outlet(3, "bang", {}) -- end of file
return
end
--pd.post ("1> ourLine is [" .. ourLine .. "] len: " .. ourLine:len())
-- strip CR LF
s,e = ourLine:find("[\n\r]")
if s then
--pd.post("1> CR or LF at " .. s)
ourLine = ourLine:sub(1,s-1) .. " "
else
ourLine = ourLine .. " "
end
elseif ourRemainingLine:len() == 0 then -- read another line
--pd.post ("2> ourRemainingLine length 0")
ourLine = ourTextFile:read()
if ourLine == nil then
self:outlet(3, "bang", {}) -- end of file
return
end
--pd.post ("2> ourLine is [" .. ourLine .. "] len: " .. ourLine:len())
s,e = ourLine:find("[\n\r]")
if s then
--pd.post("2> CR or LF at " .. s)
ourLine = ourLine:sub(1,s-1) .. " "
else
ourLine = ourLine .. " "
end
--pd.post("Not setting ourLine from ourRemainingLine, whose length is precisely " .. ourRemainingLine:len())
else
cstart,cend = ourRemainingLine:find("[,.;!?:]")
if cstart == nil then -- no punctuation in remainingLine, add next line from ourTextFile
--pd.post("3> Adding a new line to ourRemainingLine")
ourLine = ourTextFile:read()
if ourLine == nil then -- no more lines
self:outlet(3, "bang", {}) -- end of file
return
end
--pd.post ("3> ourLine is [" .. ourLine .. "] len: " .. ourLine:len())
s,e = ourLine:find("[\n\r]")
if s then
--pd.post("3> CR or LF at " .. s)
ourLine = ourLine:sub(1,s-1) .. " "
else
ourLine = ourLine .. " "
end
--ourLine = ourLine:gsub("[\n\r]", " ")
if (ourLine:len() == 1) then -- an empty line
--pd.post("BLANK LINE (1)")
ourLine = "." -- replace blank line with punctuation to force a chop
end
ourLine = ourRemainingLine .. ourLine
else -- remainingLine has punctuation
--pd.post("4> ourRemainingLine contains punctuation")
ourLine = ourRemainingLine
end
ourRemainingLine = nil
end -- if ourRemainingLine == nil
ourPunc = nil
if ourLine ~= nil then -- line has content
if ourLine:len() > 0 then
wordIndex = 0
--pd.post("LTextFileDrip:drip: <" .. ourLine .. ">")
--pd.post("LTextFileDrip:drip: len" .. ourLine:len())
--pd.post("LTextFileDrip:drip: 1st char" .. ourLine:byte(1))
if ((ourLine:len() == 1) and (ourLine:byte(1) == 13)) then -- a blank line
--pd.post("BLANK LINE (2)")
ourSentence = ourRemainingLine
ourRemainingLine = nil
else -- find a comma, period, semicolon, exclamation or question mark
cstart,cend = ourLine:find("[,.;!?:]")
if cstart ~= nil then -- take the line before the mark
--pd.post("LTextFileDrip:drip: cstart " .. string.format ('%d', cstart) .. " cend " .. string.format('%d', cend))
ourPunc = ourLine:sub(cend, cend)
--pd.post("LTextFileDrip:drip: punctuation: " .. ourPunc)
ourSentence = ourLine:sub(1, cend) -- leave punctuation
if ourRemainingLine ~= nil then
ourSentence = ourRemainingLine .. ourSentence
end
ourRemainingLine = ourLine:sub(cend+1)
--pd.post("LTextFileDrip:drip punctuation found: ourSentence is " .. ourSentence)
--pd.post("LTextFileDrip:drip punctuation found: ourRemainingLine is " .. ourRemainingLine)
else -- no mark, take the whole line
if ourRemainingLine ~= nil then
ourRemainingLine = ourRemainingLine .. ourLine
--pd.post("LTextFileDrip:drip more to come: ourRemainingLine is " .. ourRemainingLine)
--for c = 1, ourRemainingLine:len() do pd.post("_" .. ourRemainingLine:byte(c) .. "_") end
else
ourRemainingLine = ourLine
--pd.post("LTextFileDrip:drip first: ourRemainingLine is " .. ourRemainingLine)
end
end -- if cstart ~= nil
end -- if ((ourLine:len() == 1) and (ourLine:byte(1) == 13))
end -- if ourLine:len() > 0
if ourSentence ~= nil then
if ourSentence:gmatch("%w+") then
if ((ourSentence:len() == 1) and (ourSentence:byte(1) <= 32)) then
--pd.post("BLANK LINE (3)")
wordIndex = 0 -- skip blank line
else
wordIndex = 1
end
-- for w in ourSentence:gmatch("%w+") do
-- wordIndex = wordIndex + 1
-- words[wordIndex] = w
--pd.post("wordIndex " .. wordIndex .. " for length " .. ourSentence:len() .. " starts with " .. ourSentence:byte(1))
end
end
playbackIndex = 1
else -- bang through outlet 3 serves as end of file notification
self:outlet(3, "bang", {})
end -- if ourLine ~= nil
-- end
until ((wordIndex ~= 0) or (ourLine == nil))
if ourPunc ~= nil then
self:outlet(2, "symbol", {ourPunc}) -- output punctuation
end
if wordIndex > 0 then -- output sentence as a single symbol
if ourSentence ~= nil then
len = ourSentence:len()
--pd.post ("ourSentence:len() is " .. len)
if len > 0 then
--pd.post("ourSentence is not zero-length")
--pd.post("ourSentence [" .. ourSentence .. "]")
--pd.post("starts with " .. ourSentence:byte(1))
self:outlet(1, "symbol", {ourSentence}) -- output entire line
else
--pd.post("ourSentence is zero-length")
self:outlet(1, "bang", {}) -- an empty line
end
end
wordIndex = 0 -- no more words
ourSentence = nil -- no more sentence
end
end
function LTextFileDrip:in_1(sel, atoms) -- anything
-- pd.post("LTextFileDrip:in-> sel is " .. sel);
-- pd.post("number of atoms is ".. #atoms)
-- for i,v in ipairs(atoms) do
-- pd.post(i .. " = " .. v)
-- end
if sel == "bang" then -- output the next sentence
self:drip()
elseif sel == "open" then -- open a file
self:openOurTextFile(atoms[1])
elseif sel == "rewind" then -- rewind the file
self:rewindOurTextFile()
elseif sel == "symbol" then -- assume it's a file name
self:openOurTextFile(atoms[1])
elseif #atoms == 0 then -- a selector
self:error("LTextFileDrip:in_1: input not known")
else -- reject non-symbols
self:error("LTextFileDrip:in_1: input not a symbol or bang")
end
end
-- end of ltextfile-drip
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