;+
;
; @file_comments
; Have one unique online help for IDL and SAXO
;
; @categories
; Documentation
;
; @restrictions
; Needs at least version 6.2
;
; @history
; Sept 2006: Sebastien Masson (smasson\@lodyc.jussieu.fr)
;
; @version
; $Id$
;
;-
;
PRO mergeonline_help
;
  compile_opt idl2, strictarrsubs
;
; is the IDL version at least 6.2 ?
  idlversion = float(strmid(!version.release, 0, 3))
  IF idlversion LT 6.2 THEN BEGIN
    ras = report('Warning: You need at least IDL 6.2 to use SAXO/IDL merged online help')
    return
  ENDIF
;---------------------------------------------------------------
; check directories
;---------------------------------------------------------------
; get the environment variable $HOME
  home = getenv('HOME')
; is it defined?
  IF home EQ '' THEN return
; is $HOME a writable directory?
  home = (file_search(home, /test_directory, /test_write, /mark_directory))[0]
  IF home EQ '' THEN return

; is !dir + '/help/online_help a directory ?
  homeidl = !dir + '/help/online_help'
  homeidl = (file_search(homeidl, /test_directory, /mark_directory))[0]
  IF homeidl EQ '' THEN return

; is $HOME/.assistant a directory ? if not, create it
  homeassist = home + '.assistant'
  IF file_test(homeassist, /directory) EQ 0 THEN file_mkdir, homeassist
; is $HOME/.assistant a writable directory?
  homeassist = (file_search(homeassist, /test_directory, /test_write, /mark_directory))[0]
  IF homeassist EQ '' THEN return
; is $HOME/.assistant/src a directory ? if not, create it?
  homesrc = homeassist + 'src'
  IF file_test(homesrc, /directory) EQ 0 THEN file_mkdir, homesrc
; is $HOME/.assistant/src a writable directory?
  homesrc = (file_search(homesrc, /test_directory, /test_write, /mark_directory))[0]
  IF homesrc EQ '' THEN return

  homesaxo = file_dirname((find('buildinit.pro'))[0], /mark_directory) + 'Documentation/idldoc_assistant_output/'
  IF file_test(homesaxo + 'idldoc-lib.adp') EQ 0 THEN BEGIN
    print, 'Error when looking for the file '+ homesaxo + 'idldoc-lib.adp...'
    return
  ENDIF
;---------------------------------------------------------------
; check existence and version of the file that need to be created
;---------------------------------------------------------------

; do idl.adp and home.html already exists?
  IF file_test(homesrc + 'home.html') AND file_test(homesrc + 'idl.adp') $
     AND file_test(homesrc + 'aboutsaxo.txt') THEN BEGIN
; is the revision version of homesrc+'idl.adp' the same of homesaxo + 'idldoc-lib.adp' ?
; is $Id found in homesrc+'idl.adp'
    idladp = getfile(homesrc+'idl.adp')
    line = strmatch(idladp, '*$Id*')
    line = (where(line EQ 1))[0]
    IF line NE -1 THEN BEGIN
      new = idladp[line]
; is $Id  found in homesaxo + 'idldoc-lib.adp'
      saxoadp = getfile(homesaxo + 'idldoc-lib.adp')
      line = strmatch(saxoadp, '*$Id*')
      line = (where(line EQ 1))[0]
      IF line NE -1 THEN BEGIN
        old = saxoadp[line]
; are the 2 revision tags the same ?
        IF array_equal(old, new) THEN BEGIN
; is IDL version the same of homesrc + 'home.html' ?
          homehtml = getfile(homesrc+'home.html')
          line = strmatch(homehtml, '*IDL '+ string(idlversion, format = '(f3.1)') + '*')
          line = (where(line EQ 1))[0]
          IF line NE -1 THEN  BEGIN
            !help_path = homesrc
            print, 'Use SAXO/IDL merged online help...'
            return
          ENDIF
        ENDIF
      ENDIF
    ENDIF
  ENDIF
;---------------------------------------------------------------
; build homesrc + 'idl.adp'
;---------------------------------------------------------------
; --- modify the original idl.adp ---
  idladp = getfile(homeidl+'idl.adp')
; extract part from </profile> to </assistantconfig>
  line1 = strmatch(idladp, '*</profile>*')
  line1 = (where(line1 EQ 1))[0]
  line2 = strmatch(idladp, '*</assistantconfig>*')
  line2 = (where(line2 EQ 1))[0] - 1L
  idladp = idladp[line1:line2]
; put the complete path of the references
  idladp = strsed(idladp, 'ref=\"', 'ref="'+homeidl)
; --- modify the original idldoc-lib.adp ---
  saxoadp = getfile(homesaxo + 'idldoc-lib.adp')
; extract part from </profile>
  line1 = strmatch(saxoadp, '*</profile>*')
  line1 = (where(line1 EQ 1))[0] + 1
  saxoadp = saxoadp[line1:*]
; put the complete path of the references
  saxoadp = strsed(saxoadp, 'ref=\"', 'ref="'+homesaxo)
; --- merge idl.adp and idldoc-lib.adp, add an header and write it in a new file ---
  header = ['<!DOCTYPE DCF>' $
            , '<assistantconfig version="3.3.0">' $
            , '   <profile>' $
            , '      <property name="name">SAXO - IDL ' + !version.release + ' Help</property>' $
            , '      <property name="title">SAXO - IDL ' + !version.release + ' Help</property>' $
            , '      <property name="startpage">' + homesrc + 'home.html</property>' $
            , '      <property name="aboutmenutext">About SAXO</property>' $
            , '      <property name="abouturl">' + homesrc + 'aboutsaxo.txt</property>' $
            , '      <property name="assistantdocs">' + homeidl + '</property>']
  newadp = [temporary(header), temporary(idladp), temporary(saxoadp)]
;
  putfile, homesrc + 'idl.adp', temporary(newadp)
;---------------------------------------------------------------
; build homesrc + 'home.html'
;---------------------------------------------------------------
  homehtml = getfile(homeidl+'home.html')
; put the complete path of the references
  homehtml = strsed(homehtml, 'ref=\"', 'ref="'+homeidl)
; find the first line containing '</h3>'
  line = strmatch(homehtml, '*</h3>*')
  line = (where(line EQ 1))[0]
; insert one line after this line
  homehtml = [homehtml[0:line] $
              , '<a name="SAXOdir"> </a><p class="pIndentedRelative"><img src="images/blueball_idl.gif" id="blueballSAXOdir" border="0" hspace="0" vspace="0"/> &#160;&#160;<a href="' + homesaxo + 'home.html">SAXO Directory</a></p>' $
              , homehtml[line+1:*]]
; find the last line containing '</h3>'
  line = strmatch(homehtml, '*</h3>*')
  line = (where(line EQ 1, cnt))[cnt-1]
; insert one line after this line
  homehtml = [homehtml[0:line] $
              , '<a name="SAXOweb"> </a><p class="pIndentedRelative"><img src="images/blueball_idl.gif" id="blueballSAXOweb" border="0" hspace="0" vspace="0"/> &#160;&#160;<a href="http://forge.ipsl.jussieu.fr/saxo">SAXO Home Page</a> </p>' $
              , homehtml[line+1:*]]

; put the complete path of the images
  homehtml = strsed(homehtml, 'src=\"', 'src="'+homeidl)
; except for SAXOIDL_OnlineHelp_title.png
  parent = path_sep(/parent_directory)+path_sep()
  homehtml = strsed(homehtml, 'src=\".*IDL_OnlineHelp_Title\.gif\"', 'src="' + homesaxo + parent + 'xmldoc/images/SAXOIDL_OnlineHelp_title.png"')
;
  putfile, homesrc + 'home.html', temporary(homehtml)
;---------------------------------------------------------------
; build homesrc + 'aboutsaxo.txt'
;---------------------------------------------------------------
  about = getfile(homesaxo + parent + parent + 'overview')
; remove the lines containing @
  lines = strmatch(about, '@*')
  about = about[where(lines EQ 0)]
; add some informattions:
  about = [about, '', 'More informations on', 'http://forge.ipsl.jussieu.fr/saxo', '']
;
  putfile, homesrc + 'aboutsaxo.txt', temporary(about)
;---------------------------------------------------------------
  ras = report('Merge of SAXO and IDL online help done...')
  !help_path = homesrc
;
  RETURN
  END