Moved in html5 viewer from sketches

1 files changed, 98 insertions, 0 deletions

diff --git a/viewhtml b/viewhtml
new file mode 100755
index 0000000..f853dc3
--- /dev/null
+++ b/viewhtml
@@ -0,0 +1,98 @@
+#!/usr/bin/env tclsh
+package require tclgumbo
+package require Tk
+
+
+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
+$w tag config a -foreground blue -underline 1
+$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:
+set baseAddress [lindex $argv 1]
+set file [open [lindex $argv 0]]
+set html [read $file]
+close $file
+set output [gumbo::parse $html]
+
+proc click {w x y} {
+	global baseAddress
+	set range [$w tag prevrange href [$w index @$x,$y]]
+	set address [eval $w get $range]
+
+	# TODO:
+	if {0 == [regexp {^https?.*} $address]} {
+		exec "./html.tcl" "$baseAddress/$address" $baseAddress
+		exit
+	} else {
+		exec "./html.tcl" $address $address
+		exit
+	}
+}
+
+proc displayNode {node tagList} {
+	# TODO: Avoid using global variables.
+	global w
+	global baseAddress
+
+	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 $node]
+
+		# TODO:
+		if {$tag == "a"} {
+			$w insert end [lindex [array get $attributes] 1] [concat $tagList href]
+		} elseif {$tag == "img"} {
+			$w insert end "\n"
+			set lattr [array get $attributes]
+			set path "$baseAddress/[lindex $lattr [expr [lsearch -exact $lattr src] + 1]]"
+			image create photo $path -file $path
+			$w image create end -image $path
+			$w insert end "\n"
+		}
+
+		foreach child_node [gumbo::element_get_children $node] {
+			displayNode $child_node [concat $tag $tagList]
+		}
+
+		# TODO:
+		if {$tag == "h1" || $tag == "h2" || $tag == "p"} {
+			$w insert end "\n\n" {}
+		} elseif {$tag == "pre" || $tag == "li" || $tag == "dt" || $tag == "ul" || $tag == "dd" || $tag == "dl"} {
+			$w insert end "\n" {}
+		}
+	} elseif {$type == $gumbo::GUMBO_NODE_TEXT} {
+		# TODO: 
+		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
+		}
+	}
+}
+
+displayNode [gumbo::output_get_root $output] [list]
+$w config -state disabled
+gumbo::destroy_output $output
+