From 59e3ac9d9d30dce62b2f68643244bea9afb59eca Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.me.uk>
Date: Mon, 21 Oct 2013 18:00:40 +0100
Subject: Initial commit

---
 tkread | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100755 tkread

diff --git a/tkread b/tkread
new file mode 100755
index 0000000..8c5d318
--- /dev/null
+++ b/tkread
@@ -0,0 +1,97 @@
+#!/usr/bin/tclsh
+# Usage: tkread [-w]
+#        -w rewrap lines
+#
+# TODO:
+# - justify text (not simple; see http://wiki.tcl.tk/1774)
+# - add a basic search function
+# - add function to type 30g to scroll 30% through an article
+# - if window width is small, reduce padx space
+# - make scrolling using mouse work even when text area isn't hovered over (also note this sort of scrolling doesn't update the title); integrate the MouseWheel event with scroll. this *should* also fix the issue of dragging and then leaving the window, as the strange scrolling is likely caused by related default behaviour
+
+set fontsize 20
+set colour #333333
+set inverted 0
+set drag 0
+
+package require Tk
+
+proc rewrap {text} {
+	set wrapped [regsub -all {\n([^\n])} $text { \1}]
+	set spaced [regsub -all {  *} $wrapped { }]
+	set better [regsub -all {\n *} $spaced "\n"]
+	set better [regsub -all {\n} $better "\n\n"]
+	return [regsub -all {\n\n\n} $better "\n"]
+}
+
+proc changeFontSize {change} {
+	global fontsize
+	set newsize [expr $fontsize $change]
+	if {$newsize > 0} {
+		set fontsize $newsize
+		.t configure -font "Times $fontsize" -padx [expr $fontsize * 3] -spacing2 [expr [font metrics "Times $fontsize" -linespace] / 4]
+	}
+}
+
+proc invertColours {} {
+	global inverted colour
+	if {$inverted} {
+		set inverted 0
+		.t configure -bg white -fg $colour
+		. configure -bg #f8f8f5
+	} else {
+		set inverted 1
+		.t configure -bg $colour -fg #eeeeee
+		. configure -bg #222222
+	}
+}
+
+proc scroll {dir amount} {
+	.t yview scroll $dir $amount
+	set percent [expr [lindex [.t yview] 1] * 100]
+	set rough [regsub {\..*} $percent {}]
+	wm title . "tkread $rough%"
+}
+
+proc doMotion {ypos} {
+	global lasty
+	if { $lasty != -1 } {
+		scroll [expr $lasty - $ypos] pixels
+	}
+	set lasty $ypos
+}
+
+. configure -bg #f8f8f5
+text .t -font "Times $fontsize" -wrap word -width 64 -padx [expr $fontsize * 3] -bg white -fg $colour -spacing2 [expr [font metrics "Times $fontsize" -linespace] / 4] -relief flat -inactiveselectbackground {} -cursor {}
+pack .t -expand yes -fill y
+set text [read stdin]
+if { $::argc > 0 && [lindex $::argv 0] == "-w" } {
+	set text [rewrap $text]
+}
+.t insert end $text
+.t configure -state disabled ;# disable cursor
+
+bind . <Up> {scroll -1 unit}
+bind . <k> {scroll -1 unit}
+bind . <Down> {scroll 1 unit}
+bind . <j> {scroll 1 unit}
+bind . <Prior> {scroll -1 page}
+bind . <Shift-space> {scroll -1 page}
+bind . <Left> {scroll -1 page}
+bind . <b> {scroll -1 page}
+bind . <K> {scroll -1 page}
+bind . <Next> {scroll 1 page}
+bind . <space> {scroll 1 page}
+bind . <Right> {scroll 1 page}
+bind . <J> {scroll 1 page}
+bind . <Home> {.t yview moveto 0}
+bind . <End> {.t yview moveto 1}
+bind . <equal> {changeFontSize +5}
+bind . <minus> {changeFontSize -5}
+bind . <plus> {changeFontSize +1}
+bind . <underscore> {changeFontSize -1}
+bind . <v> {invertColours}
+bind . <q> {exit}
+bind . <ButtonPress-1> {set drag 1; set lasty -1}
+bind . <ButtonRelease-1> {set drag 0}
+bind . <Motion> {if {$drag} { doMotion %y } }
-- 
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