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# Ruby module for itex2MML
#
# Installation
# ------------
# 1. You need SWIG (>= 1.3) and GNU Make to install
# the Ruby module.
# 2. Then type:
# make ruby
# make test_ruby
# make install_ruby
# 3. This module can then be invoked like:
#
# require 'itextomml'
#
# itex = Itex2MML::Parser.new
# itex.html_filter(string)
#
# Usage
# -----
#
# There are four public methods
#
# itex.html_filter(a_string)
# converts all itex equations in a_string to MathML, passing the
# rest of a_string unmodified. Returns the converted string.
#
# itex.filter(a_string)
# converts all itex equations in a_string to MathML. Returns just
# the MathML equation(s), as a string.
#
# itex.inline_filter(a_string)
# treats a_string as an inline equation (automatically supplies
# the surrounding $...$, so you don't have to) and converts it
# MathML. Returns the MathML inline equation, as a string.
#
# itex.block_filter(a_string)
# treats a_string as a block equation (automatically supplies
# the surrounding $$...$$, so you don't have to) and converts it
# MathML. Returns the MathML block equation, as a string.
#
# Authors: Justin Bonnar <jbonnar@berkeley.edu>
# Jacques Distler <distler@golem.ph.utexas.edu>
#
# Placed in the Public Domain
require 'itex2MML'
require 'thread'
module Itex2MML
class Error < RuntimeError; end
class Parser
def self.semaphore
@semaphore ||= Mutex.new
end
def html_filter(string)
parse(string, :itex2MML_html_filter)
end
def filter(string)
parse(string, :itex2MML_filter)
end
def inline_filter(string)
parse("\$#{string}\$", :itex2MML_filter)
end
def block_filter(string)
parse("\$\$#{string}\$\$", :itex2MML_filter)
end
private
def parse(string, message)
str = as_bytes(string.to_str)
self.class.semaphore.synchronize do
raise Itex2MML::Error unless Itex2MML.send(message, str, str.length) == 0
as_utf8(Itex2MML.itex2MML_output)
end
end
if "".respond_to?(:force_encoding)
def as_bytes(string)
string.force_encoding("ASCII-8BIT")
end
def as_utf8(string)
string.force_encoding("UTF-8")
end
else
def as_bytes(string)
string
end
def as_utf8(string)
string
end
end
end
end
## Unit Tests ##
if __FILE__ == $0
require 'test/unit'
class Itex2MMLTest < Test::Unit::TestCase
def test_inline_html
itex = Itex2MML::Parser.new
assert_equal("Inline: <math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.html_filter('Inline: $\sin(x)$'))
end
def test_inline
itex = Itex2MML::Parser.new
assert_equal("<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.filter('Inline: $\sin(x)$'))
end
def test_inline_inline
itex = Itex2MML::Parser.new
assert_equal("<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.inline_filter('\sin(x)'))
end
def test_block_html
itex = Itex2MML::Parser.new
assert_equal("Block: <math xmlns='http://www.w3.org/1998/Math/MathML' display='block'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.html_filter('Block: $$\sin(x)$$'))
end
def test_block
itex = Itex2MML::Parser.new
assert_equal("<math xmlns='http://www.w3.org/1998/Math/MathML' display='block'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.filter('Block: $$\sin(x)$$'))
end
def test_block_block
itex = Itex2MML::Parser.new
assert_equal("<math xmlns='http://www.w3.org/1998/Math/MathML' display='block'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.block_filter('\sin(x)'))
end
def test_inline_utf8
itex = Itex2MML::Parser.new
s = "".respond_to?(:force_encoding) ? "\u00F3" : "\303\263"
assert_equal("ecuasi"+ s + "n <math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'>" +
"<mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>",
itex.html_filter("ecuasi\303\263n $\\sin(x)$"))
end
def test_inline_utf8_inline
itex = Itex2MML::Parser.new
assert_equal("<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><mi>sin</mi><mo stretchy=\"false\">(</mo><mi>x</mi><mo stretchy=\"false\">)</mo></math>", itex.filter("ecuasi\303\263n $\\sin(x)$"))
end
def test_utf8_in_svg_foreignObject
itex = Itex2MML::Parser.new
s = "".respond_to?(:force_encoding) ? "\u2032" : "\342\200\262"
assert_equal("<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><mi>g" +
"</mi><mo>′</mo><mo>=</mo><semantics><annotation-xml encoding=\"SVG1.1\"><svg w" +
"idth='40' height='40' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3." +
"org/1999/xlink'><foreignObject height='19' width='20' font-size='16' y='0' x='0'><ma" +
"th display='inline' xmlns='http://www.w3.org/1998/Math/MathML'><mi>g</mi><mo>" +
s + "</mo></math></foreignObject></svg></annotation-xml></semantics></math>",
itex.filter("$g' = \\begin{svg}<svg width='40' height='40' xmlns='http://www.w3.org/20" +
"00/svg' xmlns:xlink='http://www.w3.org/1999/xlink'><foreignObject height='19' width='" +
"20' font-size='16' y='0' x='0'><math display='inline' xmlns='http://www.w3.org/1998/M" +
"ath/MathML'><mi>g</mi><mo>\342\200\262</mo></math></foreignObject></svg>\\end{svg}$"))
end
end
end
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