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
|
# coding: utf-8
class PDF::Reader
# A value object that represents one or more consecutive characters on a page.
class TextRun
include Comparable
attr_reader :x, :y, :width, :font_size, :text
alias :to_s :text
def initialize(x, y, width, font_size, text)
@x = x
@y = y
@width = width
@font_size = font_size.floor
@text = text
end
# Allows collections of TextRun objects to be sorted. They will be sorted
# in order of their position on a cartesian plain - Top Left to Bottom Right
def <=>(other)
if x == other.x && y == other.y
0
elsif y < other.y
1
elsif y > other.y
-1
elsif x < other.x
-1
elsif x > other.x
1
end
end
def endx
@endx ||= x + width
end
def mean_character_width
@width / character_count
end
def mergable?(other)
y.to_i == other.y.to_i && font_size == other.font_size && mergable_range.include?(other.x)
end
def +(other)
raise ArgumentError, "#{other} cannot be merged with this run" unless mergable?(other)
if (other.x - endx) <( font_size * 0.2)
TextRun.new(x, y, other.endx - x, font_size, text + other.text)
else
TextRun.new(x, y, other.endx - x, font_size, "#{text} #{other.text}")
end
end
def inspect
"#{text} w:#{width} f:#{font_size} @#{x},#{y}"
end
private
def mergable_range
@mergable_range ||= Range.new(endx - 3, endx + font_size)
end
# Assume string encoding is marked correctly and we can trust String#size to return a
# character count
def character_count
@text.size.to_f
end
end
end
|
