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proc ::helpdoc::getFromTree {tree node key} {
if { [$tree keyexists $node $key] } {
return [$tree get $node $key]
}
return ""
}
proc ::helpdoc::getDescendantNodes {tree node args} {
# Usage: getDescendantNodes $tree $node tag1 tag2 last_tag
# get all descendant node's pointers that matches
set result ""
set tag [lindex $args 0]
foreach child [$tree children $node] {
set _tag [getFromTree $tree $child tag]
if { $tag == $_tag } {
if { $tag == $args } {
append result "$child "
} else {
set args1 [lrange $args 1 end]
return [getDescendantNodes $tree $child $args1]
}
}
}
return $result
}
proc ::helpdoc::getDescendantText {tree node args} {
# Usage: getDescendantText $tree $node tag1 tag2 last_tag
# Beware: it will get the text from all tags that matches
set result ""
set tag [lindex $args 0]
foreach child [$tree children $node] {
set _tag [getFromTree $tree $child tag]
if { $tag == $_tag } {
if { $tag == $args } {
append result "[getFromTree $tree $child text] "
} else {
set args1 [lrange $args 1 end]
return [getDescendantText $tree $child $args1]
}
}
}
return $result
}
proc ::helpdoc::getDescendantAttribute {tree node args} {
# Usage: getDescendantText $tree $node tag1 tag2 last_tag attribute_of_last_tag
# Beware: it will get the requested attribute from all tags that matches
set result ""
set tag [lindex $args 0]
set att [lindex $args end]
foreach child [$tree children $node] {
set _tag [getFromTree $tree $child tag]
if { $tag == $_tag } {
if { [llength $args] == 2 } {
# ok _tag is the attribute
set attr [getFromTree $tree $child attributes]
attr2array_ arr $attr
if { [info exists arr($att)] } {
append result $arr($att)
}
} else {
set args1 [lrange $args 1 end]
return [getDescendantAttribute $tree $child $args1]
}
}
}
return $result
}
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