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var lop = require("lop");
var RegexTokeniser = lop.RegexTokeniser;
var documentMatchers = require("./document-matchers");
var htmlPaths = require("./html-paths");
exports.readHtmlPath = readHtmlPath;
exports.readDocumentMatcher = readDocumentMatcher;
exports.readStyle = readStyle;
function readStyle(string) {
return parseString(styleRule(), string);
}
function styleRule() {
return lop.rules.sequence(
lop.rules.sequence.capture(documentMatcherRule()),
lop.rules.tokenOfType("whitespace"),
lop.rules.tokenOfType("arrow"),
lop.rules.tokenOfType("whitespace"),
lop.rules.sequence.capture(htmlPathRule())
).map(function(documentMatcher, htmlPath) {
return {
from: documentMatcher,
to: htmlPath
};
});
}
function readDocumentMatcher(string) {
return parseString(documentMatcherRule(), string);
}
function documentMatcherRule() {
var sequence = lop.rules.sequence;
var identifierToConstant = function(identifier, constant) {
return lop.rules.then(
lop.rules.token("identifier", identifier),
function() {
return constant;
}
);
};
var paragraphRule = identifierToConstant("p", documentMatchers.paragraph);
var runRule = identifierToConstant("r", documentMatchers.run);
var elementTypeRule = lop.rules.firstOf("p or r",
paragraphRule,
runRule
);
var listTypeRule = lop.rules.firstOf("list type",
identifierToConstant("ordered-list", {isOrdered: true}),
identifierToConstant("unordered-list", {isOrdered: false})
);
var listRule = sequence(
lop.rules.tokenOfType("colon"),
sequence.capture(listTypeRule),
sequence.cut(),
lop.rules.tokenOfType("open-paren"),
sequence.capture(integerRule),
lop.rules.tokenOfType("close-paren")
).map(function(listType, levelNumber) {
return function(matcher) {
return matcher.list({
isOrdered: listType.isOrdered,
levelIndex: levelNumber - 1
});
};
});
var optionalListRule = lop.rules.then(
lop.rules.optional(listRule),
function(option) {
return option.valueOrElse(function() {
return function(matcher) {
return matcher;
}
});
}
);
return sequence(
sequence.capture(elementTypeRule),
sequence.capture(lop.rules.optional(classRule)),
sequence.capture(optionalListRule)
).map(function(createMatcher, styleName, applyList) {
return applyList(createMatcher(styleName.valueOrElse()));
});
}
function readHtmlPath(string) {
return parseString(htmlPathRule(), string);
}
function htmlPathRule() {
var capture = lop.rules.sequence.capture;
var whitespaceRule = lop.rules.tokenOfType("whitespace");
var freshRule = lop.rules.then(
lop.rules.optional(lop.rules.sequence(
lop.rules.tokenOfType("colon"),
lop.rules.token("identifier", "fresh")
)),
function(option) {
return option.map(function() {
return true;
}).valueOrElse(false);
}
);
var tagNamesRule = lop.rules.oneOrMoreWithSeparator(
identifierRule,
lop.rules.tokenOfType("choice")
);
var styleElementRule = lop.rules.sequence(
capture(tagNamesRule),
capture(lop.rules.zeroOrMore(classRule)),
capture(freshRule)
).map(function(tagName, classNames, fresh) {
var attributes = {};
var options = {};
if (classNames.length > 0) {
attributes["class"] = classNames.join(" ");
}
if (fresh) {
options["fresh"] = true;
}
return htmlPaths.element(tagName, attributes, options);
});
return lop.rules.then(
lop.rules.zeroOrMoreWithSeparator(
styleElementRule,
lop.rules.sequence(
whitespaceRule,
lop.rules.tokenOfType("gt"),
whitespaceRule
)
),
htmlPaths.elements
);
}
var identifierRule = lop.rules.tokenOfType("identifier");
var integerRule = lop.rules.tokenOfType("integer");
var classRule = lop.rules.sequence(
lop.rules.tokenOfType("dot"),
lop.rules.sequence.capture(identifierRule)
).head();
function parseString(rule, string) {
var tokens = tokenise(string);
var parser = lop.Parser();
var parseResult = parser.parseTokens(rule, tokens);
if (!parseResult.isSuccess()) {
throw new Error("Failed to parse: " + describeFailure(parseResult));
}
return parseResult.value();
}
function describeFailure(parseResult) {
return parseResult.errors().map(describeError).join("\n");
function describeError(error) {
return error.describe();
}
}
function tokenise(string) {
var tokeniser = new RegexTokeniser([
{name: "identifier", regex: /([a-zA-Z][a-zA-Z0-9\-]*)/},
{name: "dot", regex: /\./},
{name: "colon", regex: /:/},
{name: "gt", regex: />/},
{name: "whitespace", regex: /\s+/},
{name: "arrow", regex: /=>/},
{name: "open-paren", regex: /\(/},
{name: "close-paren", regex: /\)/},
{name: "integer", regex: /([0-9]+)/},
{name: "choice", regex: /\|/}
]);
return tokeniser.tokenise(string);
}
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