Initial commit

2 files changed, 368 insertions, 0 deletions

diff --git a/support/pmxchords/scripts/ChordsTr.lua b/support/pmxchords/scripts/ChordsTr.lua
new file mode 100644
index 0000000000..737c9ce642
--- /dev/null
+++ b/support/pmxchords/scripts/ChordsTr.lua
@@ -0,0 +1,124 @@
+--[[
+   (c) Copyright 2013 Ondrej Fafejta <fafejtao@gmail.com>
+       https://github.com/fafejtao/pmxChords
+]] --
+--
+-- Chords transposition class
+--
+ChordsTr = {} -- the table representing the class, which will double as the metatable for the instances
+ChordsTr.__index = ChordsTr -- failed table lookups on the instances should fallback to the class table, to get methods
+setmetatable(ChordsTr,
+    {
+        __call = function(cls, ...)
+            return cls.new(...)
+        end,
+    })
+
+--
+-- global constants
+--
+ChordsTr.CHORDS_BEGIN = "\\ch."
+ChordsTr.CHORDS_END = ".\\"
+ChordsTr.BASE_CHORDS_ARR = {
+    -- lua is indexing from 1 I need from 0 ...
+    [0] = "C",
+    [1] = "Cs",
+    [2] = "D",
+    [3] = "Ef",
+    [4] = "E",
+    [5] = "F",
+    [6] = "Fs",
+    [7] = "G",
+    [8] = "Af",
+    [9] = "A",
+    [10] = "Bf",
+    [11] = "B"
+}
+
+--
+-- Create instance of chords transposition class
+-- params iSig input signature  e.g. -1 - F major
+--        oSig output signature e.g.  2 - D major
+--
+function ChordsTr.new(iSig, oSig)
+    local self = setmetatable({}, ChordsTr)
+    self.trMap = ChordsTr.__createTransposeMap(oSig - iSig)
+    return self
+end
+
+--
+-- Core of transposition.
+-- Prepare map of transposed chords.
+-- Key is input base chord and value is output base chord.
+--
+function ChordsTr.__createTransposeMap(sigDiff)
+    local size = 12
+    local halfTones = (sigDiff * 7) % size
+    if (halfTones < 0) then
+        halfTones = halfTones + size
+    end
+
+    -- generate transpose map of base chords ...
+    local res = {}
+    local i
+    for i = 0, size - 1, 1 do
+        local key = ChordsTr.BASE_CHORDS_ARR[i]
+        local trIdx = (i + halfTones) % size;
+        res[key] = ChordsTr.BASE_CHORDS_ARR[trIdx]
+    end
+    return res
+end
+
+--
+-- transpose one line.
+-- Find each chords in line and transpose it into output signature.
+-- return transposed line.
+--
+function ChordsTr:lineTranspose(line)
+    local pos = 0;
+    local trLine = "" -- transposed line (result)
+    while true do
+        local i = line:find(ChordsTr.CHORDS_BEGIN, pos)
+        if i == nil then
+            trLine = trLine .. line:sub(pos)
+            break
+        end
+        i = i + 3 -- move after \ch.
+        trLine = trLine .. line:sub(pos, i) -- append non chord string into result
+        pos = line:find(ChordsTr.CHORDS_END, i)
+        if pos == nil then -- TODO check correctly end of chords ... e.g. check wrong line (first chord is not finished correctly): \ch.C. c \ch.G7.\ b
+            io.stderr:write("End of chords was not found!\n")
+            os.exit(-1)
+        end
+        local chord = line:sub(i + 1, pos - 1)
+        trLine = trLine .. self:doTranspose(chord)
+    end
+    return trLine
+end
+
+--
+-- do transpose of one chord.
+--
+function ChordsTr:doTranspose(chord)
+    local base, alt = ChordsTr.splitChord(chord)
+    return self.trMap[base] .. alt
+end
+
+--
+-- Split chord into two part: base chord and chord alteration.
+-- e.g. Fsm7 - base chord is Fs, alteration is m7
+--
+function ChordsTr.splitChord(chord)
+    if (chord.len == 1) then
+        return chord, ""
+    end
+    local secondChar = chord:sub(2, 2)
+    if (secondChar == 's' or secondChar == 'f') then
+        return chord:sub(1, 2), chord:sub(3)
+    else
+        return chord:sub(1, 1), chord:sub(2)
+    end
+end
+--
+-- end of ChordsTr class
+--
diff --git a/support/pmxchords/scripts/pmxchords.lua b/support/pmxchords/scripts/pmxchords.lua
new file mode 100755
index 0000000000..58179a355a
--- /dev/null
+++ b/support/pmxchords/scripts/pmxchords.lua
@@ -0,0 +1,244 @@
+#! /usr/bin/env texlua
+--
+-- global constants
+--
+VERSION = "0.9.3"
+FILE_SUFFIX = "_chtr"
+PMX_CMD = "pmxab"
+
+--[[
+   pmxchords.lua: transpose chords (\ch.C.\) and process pmxab
+
+   (c) Copyright 2013 Ondrej Fafejta <fafejtao@gmail.com>
+       https://github.com/fafejtao/pmxChords
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2 of the License, or (at your
+option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+--]]
+
+--[[
+  ChangeLog:
+    version 0.9.3 2014-04-21 - fixed transposition problem:
+                               If song began in E-minor and signature is changed in half of song to A-minor
+                               transposition must be omitted.
+
+    version 0.9.2 2013-12-13 - fixed: stop processing when pmxab fail. 
+                             - When pmxab is called generated file pmxaerr.dat is not removed.
+
+    version 0.9.1 2013-12-09 - added some options. Improved processing.
+
+    version 0.9   2013-12-05 - rewritted code from perl to lua...
+--]]
+
+function usage()
+    print("Usage:  [texlua] pmxchords.lua  basename[.pmx] ")
+    print("     1. transpose chords into new file basename" .. FILE_SUFFIX .. ".pmx")
+    print("     2. call pmxab on transposed file basename" .. FILE_SUFFIX .. ".pmx")
+    print("     3. rename basename" .. FILE_SUFFIX .. ".tex to basename.tex")
+    print("options: -v  version")
+    print("         -h  help")
+    print("         -s  stop after fist step. e.g. generate only transposed basename" .. FILE_SUFFIX .. ".pmx file")
+end
+
+function whoami()
+    print("This is pmxchords.lua version " .. VERSION)
+end
+
+whoami()
+if #arg == 0 then
+    usage()
+    os.exit(0)
+end
+
+kpse.set_program_name("luatex")
+require"ChordsTr"
+
+function parseInputSignature(line)
+    -- parse input signature from pmx digits line. Only one line digits format is supported!
+    -- e.g.
+    --    1      1       2     4      2      4        0    -1
+    -- signature is -1 : F major
+    local res = string.match(line, "^%s*[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+([%+%-]?[0-9]+)%s*$")
+    return tonumber(res)
+end
+
+function parseOutputSignature(line)
+    -- parse output signature from pmx
+    -- e.g.
+    -- K-2+2
+    -- output signature is +2 : D major
+    local res = string.match(line, "^K[%+%-]?[0-9]+([%+%-]?[0-9]+)")
+    return tonumber(res)
+end
+
+--
+-- Strip comments from line
+-- Comments begin with % character
+--
+function lineWithoutComment(line)
+    local i = string.find(line, "%%")
+    if (i == nil) then
+        return line
+    end
+    return line:sub(0, i - 1)
+end
+
+--
+-- Function checks only if the line contains \ch. string.
+-- It does not check correctly if notes already started. It checks only if chords started..
+-- Scenario bellow will fail!
+--   d44 f a r / % first line does not contain chords symbol
+--   % signature is changed
+--   K+0+0
+--   \ch.C.\ c44 e g r4 /
+--
+function checkChordsAlreadyStarted(line)
+    local i = string.find(lineWithoutComment(line), ChordsTr.CHORDS_BEGIN)
+    if (i ~= nil) then
+        return true
+    end
+    return false;
+end
+
+function handleErr(msg)
+    io.stderr:write(msg .. "\n")
+    os.exit(2)
+end
+
+--
+-- get file name without .pmx suffix
+--
+function getBaseFileName(fileName)
+    if fileName ~= "" and string.sub(fileName, -4, -1) == ".pmx" then
+        return string.sub(fileName, 1, -5)
+    else
+        return fileName
+    end
+end
+
+--
+-- Make chords transposition. Generates new pmx file with transposed chords.
+--
+-- param baseName input file name without .pmx suffix
+-- return outputBaseName transposed pmx file name without .pmx suffix
+-- 
+function makeChordsTransposition(baseName)
+    local inputFileName = baseName .. ".pmx"
+    local inputFile = io.open(inputFileName, "r")
+    if (inputFile == nil) then
+        handleErr("File does not exist: " .. inputFileName)
+    end
+
+    local outputBaseName = baseName .. FILE_SUFFIX -- output base name without suffix. Used for renaming generated .tex file ...
+    local outputFileName = outputBaseName .. ".pmx"
+    local outputFile = io.open(outputFileName, "w")
+    if (outputFile == nil) then
+        handleErr("Can not create temporary file: " .. outputFileName)
+    end
+
+    --
+    -- transpose chords from inputFile into outputFile
+    --
+    -- input and output signature will be parsed from input pmx file
+    --
+    local iSig = nil -- input signature
+    local chTr = nil -- chords transposition class
+
+    -- If song began in E-minor and signature is changed in half of song to A-minor
+    --      transposition must be omitted.
+    local chordsAlreadyStarted = false;
+
+    for line in inputFile:lines() do
+        if (chTr ~= nil) then
+            outputFile:write(chTr:lineTranspose(line) .. "\n")
+        else
+            outputFile:write(line .. "\n")
+        end
+        if (iSig == nil) then
+            iSig = parseInputSignature(line)
+            if (iSig ~= nil) then
+                io.stderr:write("Chords: input signature detected: " .. iSig .. "\n")
+            end
+        elseif (chTr == nil and not chordsAlreadyStarted) then
+            local oSig = parseOutputSignature(line)
+            if (oSig ~= nil) then
+                io.stderr:write("Chords: output signature detected: " .. oSig .. "\n")
+                chTr = ChordsTr(iSig, oSig)
+            elseif (checkChordsAlreadyStarted(line)) then
+                io.stderr:write("Chords: notes already started. Chords transposition is omitted.\n")
+                chordsAlreadyStarted = true;
+            end
+        end
+    end
+    inputFile:close()
+    outputFile:close()
+
+    return outputBaseName
+end
+
+--
+-- Make pmxab process.
+-- param baseName input file name without .pmx suffix
+-- param outputBaseName transposed pmx file name without .pmx suffix
+--
+function pmxabProcess(baseName, outputBaseName)
+    --
+    -- call pmxab to generate .tex file
+    --
+    os.execute(PMX_CMD .. " " .. outputBaseName)
+    -- check error
+    local pmxaerr = io.open("pmxaerr.dat", "r")
+    if (not pmxaerr) then
+        handleErr("No log file.")
+    end
+    local linebuf = pmxaerr:read()
+    local err = tonumber(linebuf)
+    pmxaerr:close()
+    if (err ~= 0) then
+        handleErr("PMX process fail! " .. outputBaseName .. ".pmx")
+    end
+
+    os.rename(outputBaseName .. ".tex", baseName .. ".tex")
+
+    -- remove temporary files
+    os.remove(outputBaseName .. ".pmx")
+    os.remove(outputBaseName .. ".pml")
+end
+
+narg = 1
+onlyTranspose = false
+
+repeat
+    local this_arg = arg[narg]
+    if this_arg == "-v" then
+        os.exit(0)
+    elseif this_arg == "-h" then
+        usage()
+        os.exit(0)
+    elseif this_arg == "-s" then
+        onlyTranspose = true
+    else
+        local baseName = getBaseFileName(this_arg)
+        local outputBaseName = makeChordsTransposition(baseName)
+
+        if (onlyTranspose) then
+            os.exit(0)
+        end
+        pmxabProcess(baseName, outputBaseName)
+    end
+
+    narg = narg + 1
+until narg > #arg
+