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#!/usr/bin/env tclsh
package require tclgumbo
package require Tk
package require tksvg
package require Img
# TODO: This is still ugly, refactor into functions and namespaces?
text .t -yscrollcommand {.s set} -relief flat -font {Times 12} -wrap word -border 4
scrollbar .s -command {.t yview}
pack .s -side right -fill y
pack .t -side left -fill both -expand 1
set w .t
$w tag config title -elide true
$w tag config href -elide true
$w tag config script -elide true
$w tag config style -elide true
$w tag config a -foreground blue -underline 1
$w tag config strong -font {Times 12 bold}
$w tag config b -font {Times 12 bold}
$w tag config i -font {Times 12 italic}
$w tag config em -font {Times 12 italic}
$w tag config pre -font {Courier 12}
$w tag config code -font {Courier 12}
$w tag config h1 -font {Times 18}
$w tag config h2 -font {Times 18}
$w tag config ul -lmargin1 40 -lmargin2 40
$w tag config dd -lmargin1 40 -lmargin2 40
$w tag config p
$w tag bind a <Enter> "$w config -cursor hand2"
$w tag bind a <Leave> "$w config -cursor {}"
$w tag bind a <ButtonRelease-1> "click $w %x %y"
# TODO: Avoid globals
variable baseAddress
proc makeAddress {address} {
global baseAddress
if {1 == [regexp {^https?.*} $address]} {
return "$address"
} elseif {1 == [regexp {^/[^/].*} $address]} {
return "[regsub {(https?://[^/]+)/.*} $baseAddress {\1}]$address"
} elseif {1 == [regexp {^//.*} $address]} {
return "https:$address"
} else {
return "$baseAddress$address"
}
}
proc click {w x y} {
global baseAddress
set range [$w tag prevrange href [$w index @$x,$y]]
set address [eval $w get $range]
set result [exec browse -f viewhtml [makeAddress $address]]
if {[llength $result] == 2} {
displayPage $w [lindex $result 0] [lindex $result 1]
}
}
proc displayNode {w node tagList} {
set type [gumbo::node_get_type $node]
if {$type == $gumbo::GUMBO_NODE_ELEMENT} {
set tag [gumbo::element_get_tag_name $node]
set attributes [gumbo::element_get_attributes $node]
# TODO: This could be simplified in a way that allows for easy extension and won't end up in a long if-elseif-chain
if {$tag == "a"} {
$w insert end [lindex [array get $attributes] 1] [concat $tagList href]
} elseif {$tag == "img"} {
$w insert end "\n"
set lattr [array get $attributes]
set path [makeAddress [lindex $lattr [expr [lsearch -exact $lattr src] + 1]]]
set localPath [lindex [split [exec phttp $path] { }] 2]
image create photo $path -file $localPath
$w image create end -image $path
$w insert end "\n"
}
foreach child_node [gumbo::element_get_children $node] {
displayNode $w $child_node [concat $tag $tagList]
}
# TODO: Handle margins and blocks better than this.
if {$tag == "h1" || $tag == "h2" || $tag == "p"} {
$w insert end "\n\n" {}
} elseif {$tag == "pre" || $tag == "li" || $tag == "dt" || $tag == "ul" || $tag == "dd" || $tag == "dl" || $tag == "div" || $tag == "br"} {
$w insert end "\n" {}
}
} elseif {$type == $gumbo::GUMBO_NODE_TEXT} {
# TODO: This could be simplified.
if {0 <= [lsearch $tagList pre]} {
$w insert end [gumbo::text_get_text $node] $tagList
} else {
$w insert end [regsub -all {\s+} [gumbo::text_get_text $node] " "] $tagList
}
}
}
proc displayPage {w newBaseAddress filePath} {
global baseAddress
set baseAddress $newBaseAddress
set file [open $filePath]
set html [read $file]
set output [gumbo::parse $html]
close $file
$w config -state normal
$w delete 1.0 end
displayNode $w [gumbo::output_get_root $output] [list]
$w config -state disabled
gumbo::destroy_output $output
}
displayPage $w [lindex $argv 1] [lindex $argv 0]
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