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Comment for knownCommands

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Yury Delendik 2012-05-21 15:23:49 -05:00
parent 43f1946c7a
commit 874357aac1
1 changed files with 7 additions and 0 deletions
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7
src/parser.js
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@ -266,6 +266,13 @@ var Parser = (function ParserClosure() {
var Lexer = (function LexerClosure() {
function Lexer(stream, knownCommands) {
this.stream = stream;
// The PDFs might have "glued" commands with other commands, operands or
// literals, e.g. "q1". The knownCommands is a dictionary of the valid
// commands and their prefixes. The prefixes are built the following way:
// if there a command that is a prefix of the other valid command or
// literal (e.g. 'f' and 'false') the following prefixes must be included,
// 'fa', 'fal', 'fals'. The prefixes are not needed, if the command has no
// other commands or literals as a prefix. The knowCommands is optional.
this.knownCommands = knownCommands;
}