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media.py
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media.py
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#!/usr/bin/env python3
# -*- coding: utf-8; mode: python -*-
# pylint: disable=C0330,C0103,C0325,R0914,W0613
u"""
media
~~~~~
customizing part to convert linux_tv (media) DocBook to reST with the dbtools and
XML-filter (aka dbxml.XMLTag)
:copyright: Copyright (C) 2017 Markus Heiser
:license: GPL V3.0, see LICENSE for details.
"""
# ==============================================================================
# imports
# ==============================================================================
import re
from html.parser import HTMLParser
from dbxml2rst.helper import LOG, EntityContainer, PContainer
from dbxml2rst.nodes import (
XMLTag, subEntities, filterXML )
from dbxml2rst.hooks import (
hook_replaceTag, hook_copy_file_resource, hook_drop_usless_informaltables
, hook_flatten_tables, RESOUCE_FORMAT )
from fspath import FSPath
# ==============================================================================
# setup
# ==============================================================================
LINUX_TV_CACHE = FSPath("linux_tv_cache")
LINUX_TV_BOOK = FSPath("linux_tv")
LINUX_DOCBOOK_ROOT = FSPath(".")
MEDIA_EXT = None
MEDIA_INT = None
MEDIA_REFS = None
def init_globals():
global MEDIA_EXT, MEDIA_INT, MEDIA_REFS # pylint: disable=W0603
MEDIA_EXT = EntityContainer(LINUX_TV_CACHE / "media-entities-ext.container")
MEDIA_INT = EntityContainer(LINUX_TV_CACHE / "media-entities-int.container")
MEDIA_REFS = PContainer(LINUX_TV_CACHE / "media_refs.container")
# <!-- Subsections -->
# <!ENTITY sub-biblio SYSTEM "./biblio.xml">
EXT_SUBSECT_RE = re.compile(r'''<!ENTITY\s+(?P<name>sub-\S+)\s+SYSTEM\s+"(?P<filename>\S+)"''')
# <!-- Function Reference -->
# <!ENTITY close SYSTEM "./func-close.xml">
EXT_FUNCTION_RE = re.compile(r'''<!ENTITY\s+(?P<name>(?!sub-)\S+)\s+SYSTEM\s+"(?P<filename>\S+)"''')
INT_ENTITY_RE = re.compile(r'''<!ENTITY\s+(?P<name>\S+)\s+"(?P<replacement>.*)"''')
mainFile = FSPath("media_api.xml")
# ==============================================================================
def initMedia():
# ==============================================================================
LOG.msg("init media ...")
if LINUX_TV_CACHE.EXISTS:
LINUX_TV_CACHE.rmtree()
LINUX_TV_CACHE.makedirs()
media_init_ENTITIES()
fileList = getFileList()
# only for debug requiered
fileList.add(FSPath("media-entities.tmpl"))
LOG.msg("cache files ...")
for fname in fileList:
outFile = LINUX_TV_CACHE/fname.suffix(".xml_orig")
outFile.DIRNAME.makedirs()
(LINUX_DOCBOOK_ROOT/fname).copyfile(outFile)
LOG.msg("substitude entities ...")
for fname in fileList:
inFile = fname.suffix(".xml_orig")
outFile = fname.suffix(".xml_entity")
subEntities( LINUX_TV_CACHE/inFile , LINUX_TV_CACHE/outFile ,
MEDIA_EXT, MEDIA_INT )
inFile = mainFile.suffix(".xml_entity")
LOG.msg("run XML filter (mainFile) : %s --> %s" % (inFile, mainFile))
filterXML(LINUX_TV_CACHE, inFile, mainFile
, xmlFilter = getMediaFilter()
, parseIncludes = True )
# ==============================================================================
def installMedia():
# ==============================================================================
LOG.msg("install *Media-API* book : %s" % LINUX_TV_BOOK)
if LINUX_TV_BOOK.EXISTS:
for name in LINUX_TV_BOOK.reMatchFind("[^(conf.py)]"):
name.delete()
else:
LINUX_TV_BOOK.makedirs()
fileList = getFileList()
for xmlFile in fileList:
rstFile = xmlFile.suffix(".rst")
src = LINUX_TV_CACHE / rstFile
dst = LINUX_TV_BOOK / rstFile
if rstFile == FSPath("media_api.rst"):
dst = LINUX_TV_BOOK / FSPath("index.rst")
folder = FSPath(RESOUCE_FORMAT % src.SKIPSUFFIX)
dst.DIRNAME.makedirs()
LOG.msg("install file %s" % dst)
src.copyfile(dst)
if folder.EXISTS:
dstFolder = dst.DIRNAME / folder.BASENAME
LOG.msg("install files of folder %s" % dstFolder)
folder.copytree(dstFolder)
for svgFile in dstFolder.reMatchFind(r".*\.svg$"):
if not svgFile.suffix(".pdf").EXISTS:
try:
import cairosvg
LOG.msg("convert %s to PDF" % svgFile)
cairosvg.svg2pdf(url=svgFile, write_to=svgFile.suffix(".pdf"))
except ImportError:
LOG.error("missing cairosvg, can't convert %s to PDF" % svgFile)
# ==============================================================================
def getFileList():
# ==============================================================================
fileList = set((mainFile, ))
for val in MEDIA_EXT.values():
fileList.add(FSPath(val))
fileList.remove("media-entities.tmpl")
fileList.remove("media-indices.tmpl")
return fileList
# ==============================================================================
def getMediaFilter():
# ==============================================================================
id2TagMap = {}
for ID in [ "capture", "overlay", "output", "osd", "codec", "effect", "raw-vbi"
, "sliced", "ttx", "radio", "rds", "sdr", "event", "subdev"
, "Remote_controllers_Intro", "remote_controllers_sysfs_nodes"
, "Remote_controllers_tables", "Remote_controllers_table_change"
]:
id2TagMap[ID] = "chapter"
id2TagMap["planar-apis"] = "chapter"
for ID in [
"pixfmt", "io", "common" # v4l
, "dvb_frontend","net", "dvbproperty", "frontend_fcalls" # dvb
, "frontend_legacy_api"
, "dvb_demux", "dvb_ca", "net", "dvb_video", "dvb_audio", "net_fcalls"
, "lirc_device_interface" ]:
id2TagMap[ID] = "part"
xmlFilter = XMLTag()
for hook in [hook_replaceTag(id2TagMap)
, hook_media_table2variablelist
, hook_media_table2variablelist_2
, hook_media_fix_misc
, hook_media_handle_subsec
, hook_media_create_chunks
, hook_media_rstInclude
, hook_media_insert_src_headers
, hook_drop_usless_informaltables
, hook_flatten_tables()
, hook_copy_file_resource(LINUX_DOCBOOK_ROOT) ]:
xmlFilter.parseData.hooks.append(hook)
return xmlFilter
# ==============================================================================
def media_init_ENTITIES():
# ==============================================================================
"""Reads *media* entities from a SGML files (ugly hack).
The parsed entities will be cached within the *cache*"""
LOG.info("init *media* entities")
MEDIA_EXT.clear()
MEDIA_INT.clear()
addCharEntities(MEDIA_INT)
# folder where the origin xml files should be in
o_folder = LINUX_DOCBOOK_ROOT / "media"
for entity_file in [ LINUX_DOCBOOK_ROOT / "media-entities.tmpl" ,
LINUX_DOCBOOK_ROOT / "media-indices.tmpl" ,
LINUX_DOCBOOK_ROOT / "media_api.tmpl" ]:
with entity_file.openTextFile() as f:
for line in f:
line = line.strip()
m = EXT_SUBSECT_RE.search(line)
if m:
MEDIA_EXT.addNew(
m.group("name"), findOriginXML(o_folder, m.group("filename")))
continue
m = EXT_FUNCTION_RE.search(line)
if m:
MEDIA_EXT.addNew(
m.group("name"), findOriginXML(o_folder, m.group("filename")))
continue
m = INT_ENTITY_RE.search(line)
if m:
MEDIA_INT.addNew(m.group("name"), m.group("replacement"))
LOG.info("store entity-container: \n* externel: %s\n* internal: %s"
% (MEDIA_EXT.pFile, MEDIA_INT.pFile))
MEDIA_EXT.writeToFile()
MEDIA_INT.writeToFile()
# ==============================================================================
def hook_media_fix_misc(node, rstPrefix, parseData):
# ==============================================================================
# run this hook only on the root node
if node.getparent() is not None:
return node
if node.find(".//*[@id='%s']" % "packed-yuv") is not None:
# insert missing cells in the table in this section
table = node.find(".//table")
headrow = table.find(".//thead/row")
headrow.insert(4,node.makeelement("entry"))
headrow.insert(6,node.makeelement("entry"))
headrow.insert(8,node.makeelement("entry"))
return node
# ==============================================================================
def hook_media_rstInclude(node, rstPrefix, parseData):
# ==============================================================================
# The fragmentation into external entitys is arbitrary. The xml-fragments
# partial are missing their enclosing root node (not parsable), somtimes
# not. A valid XML file must have only one root node!
# run this hook only on the root node
if node.getparent() is not None:
return node
for incl in node.findall(".//%s" % XMLTag.rstInclude_tag):
if incl.get("fname") == 'media-indices.tmpl':
XMLTag.dropNode(incl)
continue
parent = incl.getparent()
if (XMLTag.getStripedText(parent)
or parent.tag == "dummy"):
# can not moved / should not move
continue
folder = FSPath(parseData.folder)
inFile = (folder / incl.get("fname")).suffix(parseData.fname.SUFFIX)
outFile = inFile
ID = parent.get("id")
preTag = "<%s id='%s'>" % (parent.tag, ID)
postTag = "</%s>" % parent.tag
content = inFile.readFile()
if not content.startswith(preTag):
with outFile.openTextFile("w") as out:
out.write(preTag + content + postTag)
LOG.info("moved %s to %s" % (preTag, outFile))
else:
LOG.info("allready moved %s to %s" % (preTag, outFile))
parent.addprevious(incl)
XMLTag.dropNode(parent)
return node
# ==============================================================================
def hook_media_table2variablelist(node, rstPrefix, parseData):
# ==============================================================================
# This hooks transforms some tables to definition lists.
# run this hook only on the root node
if node.getparent() is not None:
return node
for ID in [ "control-id" ]:
elem = node.find(".//*[@id='%s']" % ID)
if (elem is not None
and elem.tag == "table" ):
table2variablelist_3cols(elem, rstPrefix, parseData)
for ID in [
"control-id", "mpeg-control-id" , "mfc51-control-id", "cx2341x-control-id",
"vpx-control-id", "camera-control-id", "fm-tx-control-id", "flash-control-id",
"jpeg-control-id", "image-source-control-id", "image-process-control-id", "dv-control-id",
"fm-rx-control-id", "detect-control-id", "rf-tuner-control-id" ]:
elem = node.find(".//*[@id='%s']" % ID)
if (elem is not None
and elem.tag == "table" ):
table2variablelist(elem, rstPrefix, parseData)
return node
def table2variablelist(node, rstPrefix, parseData):
ID = node.get("id")
section = node.makeelement("section")
section.append(XMLTag.copyNode(node.find("title")))
tgroup = node.find("tgroup")
tbody = tgroup.find("tbody")
tableRows = tbody.findall("row")
varentry = None
varlist = node.makeelement("variablelist")
section.append(varlist)
while tableRows:
row = tableRows.pop(0)
row_id = row.get("id")
entry1, entry2 = (row.findall("entry") + [None, None])[:2]
if entry1 is None:
entrytbl = row.find("entrytbl")
table = XMLTag.copyNode(entrytbl, "table")
table.attrib.clear()
if row_id is not None:
table.set("id", row_id)
section.append(table)
varlist = node.makeelement("variablelist")
section.append(varlist)
elif entry1.get("spanname") == "id":
if row_id is not None:
new = XMLTag.getInjInlineTag()
new.text = "\n\n.. _`%s`:\n\n" % row_id
section.append(new)
varlist = node.makeelement("variablelist")
section.append(varlist)
varentry = node.makeelement("varlistentry")
varlist.append(varentry)
term = node.makeelement("term")
varentry.append(term)
constant = node.makeelement("constant")
term.append(constant)
constant.text = XMLTag.getStripedText(entry1) + " (" + XMLTag.getStripedText(entry2) +")"
elif entry1.get("spanname") == "descr":
listitem = node.makeelement("listitem")
varentry.append(listitem)
_descr = XMLTag.copyNode(entry1, "para")
listitem.append(_descr)
elif (entry2 is None
and (entry1 is None or not XMLTag.getStripedText(entry1))):
# skip delimiter row
varentry = None
continue
else:
#SDK.CONSOLE()
raise Exception("should never happen / markup seems inconsistent")
parent = node.getparent()
parent.replace(node, section)
section.set("id", ID)
def table2variablelist_3cols(node, rstPrefix, parseData):
ID = node.get("id")
section = node.makeelement("section")
section.append(XMLTag.copyNode(node.find("title")))
tgroup = node.find("tgroup")
tbody = tgroup.find("tbody")
tableRows = tbody.findall("row")
varentry = None
varlist = node.makeelement("variablelist")
section.append(varlist)
while tableRows:
row = tableRows.pop(0)
row_id = row.get("id")
entry1, entry2, entry3 = (row.findall("entry") + [None, None, None])[:3]
if entry3 is None:
entrytbl = row.find("entrytbl")
table = XMLTag.copyNode(entrytbl, "table")
if row_id is not None:
table.set("id", row_id)
table.attrib.clear()
section.append(table)
varlist = node.makeelement("variablelist")
section.append(varlist)
elif entry1 is not None and entry2 is not None:
if row_id is not None:
new = XMLTag.getInjInlineTag()
new.text = "\n\n.. _`%s`:\n\n" % row_id
section.append(new)
varlist = node.makeelement("variablelist")
section.append(varlist)
varentry = node.makeelement("varlistentry")
varlist.append(varentry)
term = node.makeelement("term")
varentry.append(term)
constant = node.makeelement("constant")
term.append(constant)
constant.text = XMLTag.getStripedText(entry1)
if XMLTag.getStripedText(entry2):
constant.tail = " "
_type = node.makeelement("constant")
term.append(_type)
_type.text = "(" + XMLTag.getStripedText(entry2) +")"
listitem = node.makeelement("listitem")
varentry.append(listitem)
_descr = XMLTag.copyNode(entry3, "para")
listitem.append(_descr)
else:
#SDK.CONSOLE()
raise Exception("should never happen / markup seems inconsistent")
parent = node.getparent()
parent.replace(node, section)
section.set("id", ID)
# ==============================================================================
def hook_media_table2variablelist_2(node, rstPrefix, parseData):
# ==============================================================================
# This hooks transforms some tables to definition lists.
# run this hook only on the root node
if node.getparent() is not None:
return node
for ID in ["v4l2-window", "v4l2-clip", "v4l2-rect" ]:
elem = node.find(".//*[@id='%s']" % ID)
if (elem is not None and elem.tag == "table" ):
table2variablelist_2(elem, rstPrefix, parseData)
return node
def table2variablelist_2(node, rstPrefix, parseData):
ID = node.get("id")
section = node.makeelement("section")
del node.attrib["id"]
section.set("id", ID)
footnote = node.find("title/footnote")
if footnote is not None:
section.append(footnote)
section.append(XMLTag.copyNode(node.find("title")))
node.addprevious(section)
tgroup = node.find("tgroup")
tbody = tgroup.find("tbody")
tableRows = tbody.findall("row")
varentry = None
varlist = node.makeelement("variablelist")
section.append(varlist)
while tableRows:
row = tableRows.pop(0)
entry1, entry2, entry3 = (row.findall("entry") + [None, None, None])[:3]
if entry3 is not None and XMLTag.getStripedText(entry1):
varentry = node.makeelement("varlistentry")
varlist.append(varentry)
term = node.makeelement("term")
varentry.append(term)
constant = node.makeelement("constant")
term.append(constant)
#SDK.CONSOLE()
constant.text = XMLTag.getStripedText(entry1) + " " + XMLTag.getStripedText(entry2)
listitem = node.makeelement("listitem")
varentry.append(listitem)
_descr = XMLTag.copyNode(entry3, "para")
listitem.append(_descr)
elif not XMLTag.getStripedText(entry1):
subsect = XMLTag.copyNode(entry3, "section")
section.append(subsect)
varlist = node.makeelement("variablelist")
section.append(varlist)
elif entry1.get("spanname") == "hspan":
subsect = XMLTag.copyNode(entry1, "section")
section.append(subsect)
varlist = node.makeelement("variablelist")
section.append(varlist)
else:
#SDK.CONSOLE()
raise Exception("should never happen / markup seems inconsistent")
parent = node.getparent()
parent.remove(node)
# ==============================================================================
def hook_media_insert_src_headers(node, rstPrefix, parseData):
# ==============================================================================
# run this hook only on the root node
if node.getparent() is not None:
return node
childs = node.getchildren()
if len(childs) == 1 and childs[0].tag=="programlisting":
title = "file: %s" % parseData.fname.SKIPSUFFIX
title = ("\n" + title
+ "\n" + ("=" * len(title)))
new = XMLTag.getInjBlockTag()
new.text += title
node.insert(0, new)
return childs[0]
return node
# ==============================================================================
def hook_media_create_chunks(node, rstPrefix, parseData):
# ==============================================================================
# run this hook only on the root node
if node.getparent() is not None:
return node
if parseData.fname.BASENAME.SKIPSUFFIX == "v4l2":
# there is one appendix, which missed the id attribut
for n in node.findall(".//appendix"):
if n.get("id") is None:
n.set("id", "common-defs")
break
for ID in [
# v4l2.xml
"devices", "user-func", "common-defs", "videodev"
, "capture-example", "v4l2grab-example"
# dvbapi.xml
, "legacy_dvb_apis", "audio_h", "ca_h"
, "dmx_h", "frontend_h" , "net_h", "video_h"
, "frontend_fcalls", "frontend_f_open", "frontend_f_close"
, "Remote_controllers_Intro", "remote_controllers_sysfs_nodes"
, "Remote_controllers_tables", "Remote_controllers_table_change"
, "media-controller-intro", "media-controller-model" ]:
elem = node.find(".//*[@id='%s']" % ID)
if elem is not None and elem.get("chunkNode") is None:
ext_entity = parseData.fname.DIRNAME / ("%s.xml" % ID)
XMLTag.chunkNode(
elem
, parseData.folder
, ext_entity.suffix(parseData.fname.SUFFIX))
MEDIA_EXT.addNew(ID, ext_entity)
MEDIA_EXT.writeToFile()
return node
# ==============================================================================
def hook_media_handle_subsec(node, rstPrefix, parseData):
# ==============================================================================
if parseData.fname.BASENAME.SKIPSUFFIX not in [
# v4l
"pixfmt", "io", "common", "controls", "selection-api"
, "libv4l", "compat", "selections-common"
# dvb
, "frontend", "net", "dvbproperty", "frontend_fcalls"
, "frontend_legacy_api"
, "demux", "ca", "net", "video", "audio", "net_fcalls"
, "lirc_device_interface" ]:
return node
# Some IDs cause a name collision, because, there are also entities with
# simmular names e.g."func-open.xml", which is refered by "open".
mapID = {
#"mmap" : "streaming-io"
#, "open" : "open-close-device"
#, "querycap" : "v4l2-querycap"
#, "control" : "user-controls"
}
xpath = "*/section"
if parseData.fname.BASENAME.SKIPSUFFIX in ["controls"]:
xpath = "./section"
count = 1
for section in node.findall(xpath):
count +=1
newNode = XMLTag.copyNode(section, "chapter", moveID=True)
XMLTag.replaceNode(section, newNode)
ID = newNode.get("id")
if ID is None:
ID = "%s-%03d" % (parseData.fname.BASENAME.SKIPSUFFIX, count)
else:
ID = mapID.get(ID, ID)
newNode.set("id", ID)
ext_entity = parseData.fname.DIRNAME / ("%s.xml" % ID)
XMLTag.chunkNode(
newNode
, parseData.folder
, ext_entity.suffix(parseData.fname.SUFFIX))
MEDIA_EXT.addNew("chunk_" + ID, ext_entity)
MEDIA_EXT.writeToFile()
return node
# ==============================================================================
def addCharEntities(container):
# ==============================================================================
#container.addNew("nbsp", r" |nbsp| ")
container.addNew("nbsp", r" ")
for x in ["frac12", "frac13", "frac14", "times", "copy", "hellip", "le", "ge"
, "sub", "sup", "micro", "plusmn", "mdash", "alpha" ]:
container.addNew(x, HTMLParser().unescape("&%s;" % x))
# ==============================================================================
def findOriginXML(locateFolder, fname):
# ==============================================================================
"""Find XML file (origin) realtive to *locateFolder*
If the xml file is not found within the *locateFolder*, the basename of
*fname* is returned.
"""
fname = FSPath(fname)
orig = next(locateFolder.reMatchFind(fname.BASENAME), None)
if orig:
orig = orig.relpath(LINUX_DOCBOOK_ROOT)
else:
orig = fname.BASENAME
#LOG.info(orig)
return orig
# # ==============================================================================
# def mediaBuildSingleDocBook(folder, fname, out, level=0):
# # ==============================================================================
#
# u"""Builds a single book from a media-DocBook starting file.
#
# .. code-block::
#
# media_init_ENTITIES()
# fname = CACHE / "test_v4l2.xml"
# with fname.openTextFile("w") as out:
# mediaBuildSingleDocBook(LINUX_TV_CACHE, "media/v4l/v4l2.xml", out)
# """
#
# entity = re.compile(r'''&(?P<name>[a-zA-Z][0-9a-zA-Z_-]+);''')
# folder = FSPath(folder)
# fname = folder / fname
# # LOG.info(" " * level) + fname
# with fname.openTextFile() as f:
# for line in f:
# l = entity.finditer(line)
# c = 0
# for match in l:
# name = match.group('name')
# subfile = MEDIA_EXT.get(name, None)
# if subfile:
# c += 1
# LOG.info( (" " * level) + "* %s" % subfile )
# mediaBuildSingleDocBook(folder, subfile, out, level+1)
# if not c:
# out.write(line)