# -*- python -*-
#
# The documentation generation process is tightly integrated with the
# scons build framework:
# 
# * SCons analyzes the Doxyfile's to find all the documentation
#   dependencies. This happens in the doxygen builder in
#   senfscons/Doxygen.py.
#
# * the doclib/doxy-header.html and/or doclib/doxy-footer.html files
#   are regenerated
# 
# * If any documentation is out-of-date with respect to it's source
#   files, the documentation is regenerated.
# 
# * To fix some link errors, the additional 'linklint' and 'fixlinks'
#   targets are used
#
# 
# 1. Scanning the Doxyfile's
# 
# The doxygen builder scans all documentation source files which have
# the text 'doxyfile' in any case in their name. It understands
# @INCLUDE directives and will find all the dependencies of the
# documentation:
# 
# * All the source files as selected by INPUT, INPUT_PATTERN,
#   RECURSIVE and so on.
# 
# * Any referenced tag-files
# 
# * Documentation header and/or footer
# 
# * The INPUT_FILTER program
# 
# * Any included doxygen configuration files
# 
#
# 2. Regenerating header and/or footer
#
# If needed, the doxy-header.html and/or doxy-footer.html file will be
# regenerated. The header and/or footer are generated from templates
# using a simple python based templating system called yaptu which is
# included in doclib/.
#
# 
# 3. Calling doxygen
# 
# The doxygen call itself is quite complex since there is some pre-
# and post-processing going on. We can separate this step into two
# steps
#
# * Building prerequisites (e.g. images)
#
# * The processing done by the Doxygen builder and doclib/doxygen.sh
#
#
# 3.1. Building prerequisites
#
# The prerequisites are images referenced by the documentation. These
# images are mostly generated using the Dia2Png builder.
#
#
# 3.2. The main doxygen build (Doxygen builder)
#
# The Doxygen builder will call the doxygen command to build the
# documentation. 
#
# The doxygen command is configured as 'doclib/doxygen.sh' which
# does some additional processing in addition to calling doxygen
# proper
#
# * it sets environment variables depending on command line arguments.
#   These variables are then used in the Doxyfile's
#
# * after doxygen is finished, 'installdox' is called to resolve 
#   tag file references.
#
# * the HTML documentation is post-processed using some sed, tidy, and
#   an XSLT template
#
# * a generated tag file is post-processed using an XSLT template
#
# (see doclib/doxygen.sh for more information). The Doxygen
# configuration is set up such, that
#
# * doxygen calls 'doclib/filter.pl' on each source file. This filter
#   will strip excess whitespace from the beginning of lines in
#   '\code' and '<pre>' blocks. Additionally it will expand all tabs,
#   tab width is 8 spaces (there should be no tabs in the source but
#   ...)
# 
# * doxygen calls 'doclib/dot' to generate the 'dot' images.
#
# * 'doclib/dot' calls 'doclib/dot-munge.pl' on the .dot
#    files. dot-munge.pl changes the font and font-size and adds
#    line-breaks to long labels
#
# * 'doclib/dot' calls the real dot binary. If the resulting image is
#   more than 800 pixels wide, dot is called again, this time using
#   the oposite rank direction (top-bottom vs. left-right). The image
#   with the smaller width is selected and returned.
#
#
# 4. Fixing broken links
#
# After the documentation has been generated, additional calls first
# to the 'linklint' and then to the 'fixlinks' target will try to fix
# broken links generated by doxygen. First, 'linklint' will call the
# linklint tool to check for broken links in the documentation.
#
# 'fixlinks' is then called which calls 'doclib/fixlinks.py' which
# scans *all* html files, builds an index of all (unique) anchors and
# then fixes the url part of all links with correct anchor but bad
# file name.
#


Import('env')
import SENFSCons, datetime, os

###########################################################################

import yaptu

def modules():
    # Naja ... etwas rumgehackt aber was solls ...
    global EXTRA_MODULES
    mods = {}
    pathbase = len(env.Dir('#').abspath)+1
    for module in env.Alias('all_docs')[0].sources:
        if module.name != 'html.stamp' : continue 
        mods[module.dir.dir.dir.abspath] = [ module.dir.dir.dir.name,
                                             module.dir.abspath[pathbase:],
                                             0 ]
        
    rv = []
    keys = mods.keys()
    keys.sort()
    for mod in keys:
        i = 0
        while i < len(rv):
            if len(rv[i]) > pathbase and mod.startswith(rv[i] + '/'):
                level = mods[rv[i]][2] + 1
                i += 1
                while i < len(rv) and mods[rv[i]][2] >= level:
                    i += 1
                rv[i:i] = [ mod ]
                mods[mod][2] = level
                break
            i += 1
        if i == len(rv):
            rv.append(mod)

    for mod in keys:
        if mods[mod][2] == 0:
            mods[mod][0] = 'lib' + mods[mod][0]

    n = 0
    for name,path in EXTRA_MODULES:
        path = env.Dir(path).dir.dir.abspath
        i = 0
        while i < len(rv):
            if rv[i] == path:
                mods[rv[i]][0] = name
                m = 1
                while i+m < len(rv) and mods[rv[i+m]][2] > mods[rv[i]][2]:
                    m += 1
                rv[n:n] = rv[i:i+m]
                rv[i+m:i+2*m] = []
                i += m
                n += m
            else:
                i += 1

    return ( tuple(mods[mod]) for mod in rv )

def indices():
    ix = len(env.Dir('#').abspath)+1
    return [ doc.dir.abspath[ix:]
             for doc in env.Alias('all_docs')[0].sources
             if doc.name == "search.idx" ]

def writeTemplate(target = None, source = None, env = None):
    file(target[0].abspath,"w").write(processTemplate(env))

def processTemplate(env):
    return yaptu.process(str(env['TEMPLATE']), globals(), env.Dictionary())

writeTemplate = env.Action(writeTemplate, varlist = [ 'TEMPLATE' ])

###########################################################################

# Extra documentation modules which are handled (named) different from
# library modules
EXTRA_MODULES = [
    ('Overview', '#/doc/html'),
    ('Examples', '#/Examples/doc/html'),
    ('HowTos', '#/HowTos/doc/html'),
    ('SENFSCons', '#/senfscons/doc/html') ]

HEADER = """<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>$title</title>
<link href="@TOPDIR@/doc/html/doxygen.css" rel="stylesheet" type="text/css">
<link href="@TOPDIR@/doclib/senf.css" rel="stylesheet" type="text/css">
<link rel="shortcut icon" href="@TOPDIR@/doclib/favicon.ico">
<style type="text/css">
div.tabs li.$projectname a { background-color: #EDE497; }
</style>
</head>
<body>

<div id="head">
  <div id="title">
    <div id="title2">
      <div id="search">
        <form action="@TOPDIR@/doclib/search.php" method="get">
          Search: <input type="text" name="query" size="20" accesskey="s"/> 
        </form>
      </div>
      <h1>SENF Extensible Network Framework</h1>
    </div>
  </div>
  <div id="subtitle">
    <ul>
      <li><a href="@TOPDIR@/doc/html/index.html">Home</a></li>
      <li><a class="ext" href="http://satext.fokus.fraunhofer.de/senf/debian">Download</a></li>
      <li><a class="ext" href="http://openfacts2.berlios.de/wikien/index.php/BerliosProject:SENF_Network_Framework">Wiki</a></li>
      <li><a class="ext" href="http://developer.berlios.de/projects/senf">BerliOS</a></li>
      <li><a class="ext" href="http://svn.berlios.de/wsvn/senf/?op=log&rev=0&sc=0&isdir=1">ChangeLog</a></li>
      <li><a class="ext" href="http://svn.berlios.de/viewcvs/senf/trunk/">Browse SVN</a></li>
      <li><a class="ext" href="http://developer.berlios.de/bugs/?group_id=7489">Bug Tracker</a></li>
    </ul>
  </div>
</div>

<div id="content1">
  <div id="content2">
    <div class="tabs menu">
      <ul>
{{      for name, path, level in modules():
          <li class="${name} level${level}"><a href="@TOPDIR@/${path}/index.html">${name}</a></li>
}}
        <li class="glossary level0"><a href="@TOPDIR@/doc/html/glossary.html">Glossary</a></li>
      </ul>
    </div>"""

FOOTER = """<hr style="width:0px;border:none;clear:both;margin:0;padding:0" />
  </div>
</div>
<div id="footer">
  <span>
    <a href="mailto:senf-dev@lists.berlios.de">Contact: senf-dev@lists.berlios.de</a> |
    Copyright &copy; 2006 Fraunhofer Gesellschaft, SatCom, Stefan Bund
  </span>
</div>
</body></html>"""

SEARCH_PHP="""
<?php include 'search_functions.php'; ?>
<?php search(); ?>"""

SEARCH_PATHS_PHP="""<?php
function paths() {
  return array(
{{  for index in indices():
      "../${index}/",
}}
  );
}
?>"""

env.Append( ENV = {
    'TODAY' : str(datetime.date.today()),
    'TEXINPUTS' : os.environ.get('TEXINPUTS',env.Dir('#/doclib').abspath + ':'),
    'DOXYGEN' : env.get('DOXYGEN', 'doxygen'),
})

env.Replace(
    ALL_TAGFILES = [],
    DOXYGENCOM = "doclib/doxygen.sh $DOXYOPTS $SOURCE",
)

SENFSCons.PhonyTarget(env, 'linklint', [
    'rm -rf linklint',
    'linklint -doc linklint -limit 99999999 `find -type d -name html -printf "/%P/@ "`',
    '[ ! -r linklint/errorX.html ] || python doclib/linklint_addnames.py <linklint/errorX.html >linklint/errorX.html.new',
    '[ ! -r linklint/errorX.html.new ] || mv linklint/errorX.html.new linklint/errorX.html',
    '[ ! -r linklint/errorAX.html ] || python doclib/linklint_addnames.py <linklint/errorAX.html >linklint/errorAX.html.new',
    '[ ! -r linklint/errorAX.html.new ] || mv linklint/errorAX.html.new linklint/errorAX.html',
    'echo -e "\\nLokal link check results: linklint/index.html\\nRemote link check results: linklint/urlindex.html\\n"',
])

env.Clean('all', env.Dir('linklint'))

SENFSCons.PhonyTarget(env, 'fixlinks', [
    'python doclib/fix-links.py -v -s .svn -s linklint -s debian linklint/errorX.txt linklint/errorAX.txt',
])


header = env.Command('doxy-header.html', 'SConscript', writeTemplate,
                     TEMPLATE = Literal(HEADER),
                     TITLE = "Documentation and API reference")
env.Depends(header, env.Value(repr(list(modules()))))

footer = env.Command('doxy-footer.html', 'SConscript', writeTemplate,
                     TEMPLATE = Literal(FOOTER))

env.Alias('all_docs',
          env.Command('search.php', [ 'html-munge.xsl', 'SConscript' ],
                      [ writeTemplate,
                        'xsltproc --nonet --html --stringparam topdir .. -o - $SOURCE $TARGET 2>/dev/null'
                            + "| sed"
                            +   r" -e 's/\[\[/<?/g' -e 's/\]\]/?>/g'"
                            +   r" -e 's/\$$projectname/Overview/g'"
                            +   r" -e 's/\$$title/Search results/g'"
                            +       "> ${TARGETS[0]}.tmp",
                        'mv ${TARGET}.tmp ${TARGET}' ],
                      TEMPLATE = Literal(HEADER
                                         + SEARCH_PHP.replace('<?','[[').replace('?>',']]')
                                         + FOOTER),
                      TITLE = "Search results"))
env.Alias('all_docs',
          env.Command('search_paths.php', 'SConscript', writeTemplate,
                      TEMPLATE = Literal(SEARCH_PATHS_PHP)))

env.Alias('install_all',
          env.Install( '$DOCINSTALLDIR/doclib', [ 'favicon.ico',
                                                  'logo-head.png',
                                                  'search.php',
                                                  'search_functions.php',
                                                  'search_paths.php',
                                                  'senf.css' ] ))

env.Clean('all', 'doxy-header.html') # I should not need this but I do ...
env.Clean('all_docs', 'doxy-header.html') # I should not need this but I do ...