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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
# -*-perl-*-
#+##############################################################################
#
# enable_encoding.init: handle --enable-encoding
#
# Copyright (C) 2008 Patrice Dumas <dumas@centre-cired.fr>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
#
#-##############################################################################
# for debugging printouts
#use Encode;
use strict;
use vars '$ENABLE_ENCODING_USE_ENTITY';
if (!$ENABLE_ENCODING_USE_ENTITY)
{
$USE_ISO = 0;
}
my $enable_encoding_default_init_out = $init_out;
$init_out = \&enable_encoding_init_out;
sub enable_encoding_is_entity($)
{
my $text = shift;
return 0 if (!$ENABLE_ENCODING_USE_ENTITY);
return 1 if ($text =~ /^&/ and $text =~ /;$/);
}
push @command_handler_process, \&enable_encoding_initialize_variables;
my @enable_encoding_accents_stack;
sub enable_encoding_initialize_variables()
{
@enable_encoding_accents_stack = ();
}
my %enable_encoding_default_accent;
sub enable_encoding_init_out()
{
&$enable_encoding_default_init_out();
# like utf8.init
if ($Texi2HTML::THISDOC{'ENCODING_NAME'} eq 'utf-8')
{
$normal_text = \&t2h_utf8_normal_text unless ($ENABLE_ENCODING_USE_ENTITY);
foreach my $key (keys(%unicode_accents), 'dotless')
{
$style_map{$key}->{'function'} = \&t2h_utf8_accent;
$style_map_texi{$key}->{'function'} = \&t2h_utf8_accent;
$style_map_pre{$key}->{'function'} = \&t2h_utf8_accent;
}
foreach my $key (%things_map)
{
if (exists($unicode_map{$key}) and ($unicode_map{$key} ne ''))
{
$things_map{$key} = chr(hex($unicode_map{$key})) unless (enable_encoding_is_entity($things_map{$key}));
$texi_map{$key} = chr(hex($unicode_map{$key})) unless (enable_encoding_is_entity($texi_map{$key}));
$pre_map{$key} = chr(hex($unicode_map{$key})) unless (enable_encoding_is_entity($pre_map{$key}));
}
}
}
elsif (exists($makeinfo_encoding_to_map{$Texi2HTML::THISDOC{'ENCODING_NAME'}}))
{
my $enc_map = $makeinfo_encoding_to_map{$Texi2HTML::THISDOC{'ENCODING_NAME'}};
foreach my $key (keys(%unicode_accents), 'dotless')
{
$enable_encoding_default_accent{'normal'}->{$key} = $style_map{$key}->{'function'};
$enable_encoding_default_accent{'texi'}->{$key} = $style_map_texi{$key}->{'function'};
$enable_encoding_default_accent{'pre'}->{$key} = $style_map_pre{$key}->{'function'};
$style_map{$key}->{'function'} = \&enable_encoding_normal_accent;
$style_map_texi{$key}->{'function'} = \&enable_encoding_texi_accent;
$style_map_pre{$key}->{'function'} = \&enable_encoding_pre_accent;
}
foreach my $key (%things_map)
{
if (exists($unicode_map{$key}) and ($unicode_map{$key} ne '') and
exists($makeinfo_unicode_to_eight_bit{$enc_map}->{$unicode_map{$key}}))
{ # we let perl handle the conversion
$things_map{$key} = chr(hex($unicode_map{$key})) unless (enable_encoding_is_entity($things_map{$key}));
$texi_map{$key} = chr(hex($unicode_map{$key})) unless (enable_encoding_is_entity($texi_map{$key}));
$pre_map{$key} = chr(hex($unicode_map{$key})) unless (enable_encoding_is_entity($pre_map{$key}));
}
}
}
}
sub enable_encoding_normal_accent($$$)
{
return enable_encoding_accent ('normal', @_);
}
sub enable_encoding_texi_accent($$$)
{
return enable_encoding_accent ('texi', @_);
}
sub enable_encoding_pre_accent($$$)
{
return enable_encoding_accent ('pre', @_);
}
sub enable_encoding_accent($$$$)
{
my $in = shift;
my @other_args = @_;
my $accent = shift;
my $args = shift;
my $style_stack = shift;
my $text = $args->[0];
if (scalar(@enable_encoding_accents_stack))
{
# in that case, we already have a result ready that corresponds with the
# formatting of a part of the stack mapped to
# enable_encoding_accents_stack, so it is emptied and the innermost
# $text is returned as is such that the unmodified already formatted
# innermost formatted accented text is returned.
#print STDERR " doing nothing, still in stack (@enable_encoding_accents_stack), accent: $accent";
my $stack_accent = shift @enable_encoding_accents_stack;
#print STDERR " stack_accent $stack_accent\n";
return $text;
}
# in that case there is no enable_encoding_accents_stack, so we are
# at the closing of the innermost accented command. We will try to format
# all the stack in reverse(@$style_stack) that coresponds with
# accent commands
my @accents_stack = ();
my @styles = reverse(@$style_stack);
# accents are formatted and the intermediate results are kept, such
# that we can return the maximum of multiaccented letters that can be
# rendered with a given eight bit formatting.
# first put the letter in the stack
my @utf8_partial_results = { 'result' => $text,
'accents_stack' => [ @accents_stack ]};
# then the accent that is associated with the function call
my $current_accent = t2h_utf8_accent($accent,[$text],$style_stack);
@accents_stack = ($accent);
push @utf8_partial_results, { 'result' => $current_accent,
'accents_stack' => [ @accents_stack ]};
# and then all the other accents on the stack
while (scalar(@styles) and (defined($unicode_accents{$styles[0]}) or $styles[0] eq 'dotless'))
{
my $next_style = shift @styles;
my @new_stack = reverse(@styles);
$current_accent = t2h_utf8_accent($next_style,[$current_accent],\@new_stack);
push @accents_stack, $next_style;
push @utf8_partial_results, { 'result' => $current_accent,
'accents_stack' => [ @accents_stack ]}
;
}
my $enc_map = $makeinfo_encoding_to_map{$Texi2HTML::THISDOC{'ENCODING_NAME'}};
my $eight_bit;
my $result;
# At this point we have the utf8 encoded results for the accent
# commands stack, with all the intermediate results.
# For each one we'll check if it is possible to encode it in the
# current eight bit output encoding table
foreach my $partial_result (@utf8_partial_results)
{
my $char = $partial_result->{'result'};
my $new_eight_bit = '';
my $new_codepoint;
if (ord($char) <= 128)
{
$new_eight_bit = uc(sprintf("%02x",ord($char)));
$new_codepoint = uc(sprintf("%04x",ord($char)));
}
elsif (ord($char) <= hex(0xFFFF))
{
$new_codepoint = uc(sprintf("%04x",ord($char)));
if (exists($makeinfo_unicode_to_eight_bit{$enc_map}->{$new_codepoint}))
{
$new_eight_bit = $makeinfo_unicode_to_eight_bit{$enc_map}->{$new_codepoint};
}
}
#print STDERR "" . encode('utf8', "$char") . " (@{$partial_result->{'accents_stack'}}), 8bit: $new_eight_bit\n";
last if ($new_eight_bit eq '');
last if (defined($eight_bit) and (($new_eight_bit eq $eight_bit)
and !($partial_result->{'accents_stack'}[0] eq 'dotless' and $char eq 'i')));
$result = $partial_result;
$eight_bit = $new_eight_bit;
}
if (defined($result) and scalar(@{$result->{'accents_stack'}}))
{
# we got a result, return it and put in enable_encoding_accents_stack
# the stack of accent commands that were processed.
#print STDERR "Result: ".encode('utf8', $result->{'result'}) ." '$eight_bit' (@{$result->{'accents_stack'}})\n" if defined($result);
@enable_encoding_accents_stack = @{$result->{'accents_stack'}};
# remove the first, it is the accent being processed
shift @enable_encoding_accents_stack;
return $result->{'result'};
}
return &{$enable_encoding_default_accent{$in}->{$accent}}(@other_args);
}
1;
|
