blob: 38d12526955de7fe63ed1da7b96de8200d56f6c6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#!/usr/bin/tclsh
# Usage: tkread [-w]
# -w rewrap lines
#
# The markdown parsing is inspired by the code of smu:
# <https://github.com/Gottox/smu>
#
# 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
# - add more markdown processing and control it using a flag
# - use font create / configure to name a font to simplify changing its size
set fontsize 20
set colour #554422
set inverted 0
set drag 0
set tagnum 0
set surroundfmt { \
{"***" "bold italic"} \
{"**" "bold"} \
{"*" "italic"} \
}
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"]
}
# This uses marks before tags, as they handle deletions fine, so
# marks can be made and then the formatting characters can be
# deleted without affecting the position for formatting.
proc markup {widget} {
global surroundfmt
global fontsize
global tagnum
foreach fmt $surroundfmt {
set searchchar [lindex $fmt 0]
set fmtstring [lindex $fmt 1]
set searchlen [string length $searchchar]
set insection 0
set cur ""
set markonnum 0
set markoffnum 0
set cur [$widget search $searchchar 0.0 end]
while {$cur != ""} {
if {$insection == 0} {
set insection 1
$widget mark set markon_$markonnum $cur
incr markonnum
} else {
set insection 0
$widget mark set markoff_$markoffnum $cur
incr markoffnum
}
$widget delete $cur "$cur + $searchlen chars"
set cur [$widget search "$searchchar" $cur end]
}
# ignore any final mismatched mark
if {$markonnum != $markoffnum } {
set markonnum $markoffnum
}
for {set x 0} {$x < $markonnum} {incr x} {
$widget tag add tag_$tagnum markon_$x markoff_$x
}
$widget tag configure tag_$tagnum -font "Times $fontsize $fmtstring"
incr tagnum
}
}
proc changeFontSize {change} {
global fontsize
global surroundfmt
global tagnum
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 $fontsize" -linespace] / 4]
for {set x 0} {$x < $tagnum} {incr x} {
set fmtstring [lindex [lindex $surroundfmt $x] 1]
.t tag configure tag_$x -font "Times $fontsize $fmtstring"
}
}
}
proc invertColours {} {
global inverted colour
if {$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 $text
markup .t
.t configure -state disabled ;# disable cursor
bind . <Up> {scroll -1 unit}
bind . <k> {scroll -1 unit}
bind . <Down> {scroll 1 unit}
bind . <j> {scroll 1 unit}
bind . <Prior> {scroll -1 page}
bind . <Shift-space> {scroll -1 page}
bind . <Left> {scroll -1 page}
bind . <b> {scroll -1 page}
bind . <K> {scroll -1 page}
bind . <Next> {scroll 1 page}
bind . <space> {scroll 1 page}
bind . <Right> {scroll 1 page}
bind . <J> {scroll 1 page}
bind . <Home> {.t yview moveto 0}
bind . <End> {.t yview moveto 1}
bind . <equal> {changeFontSize +5}
bind . <minus> {changeFontSize -5}
bind . <plus> {changeFontSize +1}
bind . <underscore> {changeFontSize -1}
bind . <v> {invertColours}
bind . <q> {exit}
bind . <ButtonPress-1> {set drag 1; set lasty -1}
bind . <ButtonRelease-1> {set drag 0}
bind . <Motion> {if {$drag} { doMotion %y } }
|
