1LaTeXML::Core::State(3)User Contributed Perl DocumentatioLnaTeXML::Core::State(3)
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6 "LaTeXML::Core::State" - stores the current state of processing.
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9 A "LaTeXML::Core::State" object stores the current state of processing.
10 It recording catcodes, variables values, definitions and so forth, as
11 well as mimicing TeX's scoping rules.
12 Access to State and Processing
14 "$STATE->getStomach;"
15 Returns the current Stomach used for digestion.
16 "$STATE->getModel;"
18 Returns the current Model representing the document model.
19 Scoping
21 The assignment methods, described below, generally take a $scope
22 argument, which determines how the assignment is made. The allowed
23 values and thier implications are:
24 global : global assignment.
26 local : local assignment, within the current grouping.
27 undef : global if \global preceded, else local (default)
28 <name> : stores the assignment in a `scope' which
29 can be loaded later.
30 If no scoping is specified, then the assignment will be global if a
32 preceding "\global" has set the global flag, otherwise the value will
33 be assigned within the current grouping.
34 "$STATE->pushFrame;"
36 Starts a new level of grouping. Note that this is lower level than
37 "\bgroup"; See LaTeXML::Core::Stomach.
38 "$STATE->popFrame;"
40 Ends the current level of grouping. Note that this is lower level
41 than "\egroup"; See LaTeXML::Core::Stomach.
42 "$STATE->setPrefix($prefix);"
44 Sets a prefix (eg. "global" for "\global", etc) for the next
45 operation, if applicable.
46 "$STATE->clearPrefixes;"
48 Clears any prefixes.
49 Values
51 "$value = $STATE->lookupValue($name);"
52 Lookup the current value associated with the the string $name.
53 "$STATE->assignValue($name,$value,$scope);"
55 Assign $value to be associated with the the string $name, according
56 to the given scoping rule.
57 Values are also used to specify most configuration parameters
59 (which can therefor also be scoped). The recognized configuration
60 parameters are:
61 VERBOSITY : the level of verbosity for debugging
63 output, with 0 being default.
64 STRICT : whether errors (eg. undefined macros)
65 are fatal.
66 INCLUDE_COMMENTS : whether to preserve comments in the
67 source, and to add occasional line
68 number comments. (Default true).
69 PRESERVE_NEWLINES : whether newlines in the source should
70 be preserved (not 100% TeX-like).
71 By default this is true.
72 SEARCHPATHS : a list of directories to search for
73 sources, implementations, etc.
74 "$STATE->pushValue($name,$value);"
76 This is like "->assign", but pushes a value onto the end of the
77 stored value, which should be a LIST reference. Scoping is not
78 handled here (yet?), it simply pushes the value onto the last
79 binding of $name.
80 "$boole = $STATE->isValuebound($type,$name,$frame);"
82 Returns whether the value $name is bound. If $frame is given,
83 check whether it is bound in the $frame-th frame, with 0 being the
84 top frame.
85 Category Codes
87 "$value = $STATE->lookupCatcode($char);"
88 Lookup the current catcode associated with the the character $char.
89 "$STATE->assignCatcode($char,$catcode,$scope);"
91 Set $char to have the given $catcode, with the assignment made
92 according to the given scoping rule.
93 This method is also used to specify whether a given character is
95 active in math mode, by using "math:$char" for the character, and
96 using a value of 1 to specify that it is active.
97 Definitions
99 "$defn = $STATE->lookupMeaning($token);"
100 Get the "meaning" currently associated with $token, either the
101 definition (if it is a control sequence or active character)
102 or the token itself if it shouldn't be executable. (See
103 LaTeXML::Core::Definition)
104 "$STATE->assignMeaning($token,$defn,$scope);"
106 Set the definition associated with $token to $defn. If $globally
107 is true, it makes this the global definition rather than bound
108 within the current group. (See LaTeXML::Core::Definition, and
109 LaTeXML::Package)
110 "$STATE->installDefinition($definition, $scope);"
112 Install the definition into the current stack frame under its
113 normal control sequence.
114 Named Scopes
116 Named scopes can be used to set variables or redefine control sequences
117 within a scope other than the standard TeX grouping. For example, the
118 LaTeX implementation will automatically activate any definitions that
119 were defined with a named scope of, say "section:4", during the portion
120 of the document that has the section counter equal to 4. Similarly, a
121 scope named "label:foo" will be activated in portions of the document
122 where "\label{foo}" is in effect.
123 "$STATE->activateScope($scope);"
125 Installs any definitions that were associated with the named
126 $scope. Note that these are placed in the current grouping frame
127 and will disappear when that grouping ends.
128 "$STATE->deactivateScope($scope);"
130 Removes any definitions that were associated with the named $scope.
131 Normally not needed, since a scopes definitions are locally bound
132 anyway.
133 "$sp = $STATE->convertUnit($unit);"
135 Converts a TeX unit of the form '10em' (or whatever TeX unit) into
136 scaled points. (Defined here since in principle it could track the
137 size of ems and so forth (but currently doesn't))
138
140 Bruce Miller <bruce.miller@nist.gov>
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143 Public domain software, produced as part of work done by the United
144 States Government & not subject to copyright in the US.
145perl v5.30.0 2019-10-13 LaTeXML::Core::State(3)