html2canvas-pro
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Screenshots with JavaScript. Next generation!
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseFunctionArgs = exports.nonFunctionArgSeparator = exports.nonWhiteSpace = exports.isIdentWithValue = exports.isStringToken = exports.isIdentToken = exports.isNumberToken = exports.isDimensionToken = exports.Parser = void 0;
const tokenizer_1 = require("./tokenizer");
class Parser {
constructor(tokens) {
this._tokens = tokens;
}
static create(value) {
const tokenizer = new tokenizer_1.Tokenizer();
tokenizer.write(value);
return new Parser(tokenizer.read());
}
static parseValue(value) {
return Parser.create(value).parseComponentValue();
}
static parseValues(value) {
return Parser.create(value).parseComponentValues();
}
parseComponentValue() {
let token = this.consumeToken();
while (token.type === 31 /* TokenType.WHITESPACE_TOKEN */) {
token = this.consumeToken();
}
if (token.type === 32 /* TokenType.EOF_TOKEN */) {
throw new SyntaxError(`Error parsing CSS component value, unexpected EOF`);
}
this.reconsumeToken(token);
const value = this.consumeComponentValue();
do {
token = this.consumeToken();
} while (token.type === 31 /* TokenType.WHITESPACE_TOKEN */);
if (token.type === 32 /* TokenType.EOF_TOKEN */) {
return value;
}
throw new SyntaxError(`Error parsing CSS component value, multiple values found when expecting only one`);
}
parseComponentValues() {
const values = [];
while (true) {
const value = this.consumeComponentValue();
if (value.type === 32 /* TokenType.EOF_TOKEN */) {
return values;
}
values.push(value);
values.push();
}
}
consumeComponentValue() {
const token = this.consumeToken();
switch (token.type) {
case 11 /* TokenType.LEFT_CURLY_BRACKET_TOKEN */:
case 28 /* TokenType.LEFT_SQUARE_BRACKET_TOKEN */:
case 2 /* TokenType.LEFT_PARENTHESIS_TOKEN */:
return this.consumeSimpleBlock(token.type);
case 19 /* TokenType.FUNCTION_TOKEN */:
return this.consumeFunction(token);
}
return token;
}
consumeSimpleBlock(type) {
const block = { type, values: [] };
let token = this.consumeToken();
while (true) {
if (token.type === 32 /* TokenType.EOF_TOKEN */ || isEndingTokenFor(token, type)) {
return block;
}
this.reconsumeToken(token);
block.values.push(this.consumeComponentValue());
token = this.consumeToken();
}
}
consumeFunction(functionToken) {
const cssFunction = {
name: functionToken.value,
values: [],
type: 18 /* TokenType.FUNCTION */
};
while (true) {
const token = this.consumeToken();
if (token.type === 32 /* TokenType.EOF_TOKEN */ || token.type === 3 /* TokenType.RIGHT_PARENTHESIS_TOKEN */) {
return cssFunction;
}
this.reconsumeToken(token);
cssFunction.values.push(this.consumeComponentValue());
}
}
consumeToken() {
const token = this._tokens.shift();
return typeof token === 'undefined' ? tokenizer_1.EOF_TOKEN : token;
}
reconsumeToken(token) {
this._tokens.unshift(token);
}
}
exports.Parser = Parser;
const isDimensionToken = (token) => token.type === 15 /* TokenType.DIMENSION_TOKEN */;
exports.isDimensionToken = isDimensionToken;
const isNumberToken = (token) => token.type === 17 /* TokenType.NUMBER_TOKEN */;
exports.isNumberToken = isNumberToken;
const isIdentToken = (token) => token.type === 20 /* TokenType.IDENT_TOKEN */;
exports.isIdentToken = isIdentToken;
const isStringToken = (token) => token.type === 0 /* TokenType.STRING_TOKEN */;
exports.isStringToken = isStringToken;
const isIdentWithValue = (token, value) => (0, exports.isIdentToken)(token) && token.value === value;
exports.isIdentWithValue = isIdentWithValue;
const nonWhiteSpace = (token) => token.type !== 31 /* TokenType.WHITESPACE_TOKEN */;
exports.nonWhiteSpace = nonWhiteSpace;
const nonFunctionArgSeparator = (token) => token.type !== 31 /* TokenType.WHITESPACE_TOKEN */ && token.type !== 4 /* TokenType.COMMA_TOKEN */;
exports.nonFunctionArgSeparator = nonFunctionArgSeparator;
const parseFunctionArgs = (tokens) => {
const args = [];
let arg = [];
tokens.forEach((token) => {
if (token.type === 4 /* TokenType.COMMA_TOKEN */) {
if (arg.length === 0) {
throw new Error(`Error parsing function args, zero tokens for arg`);
}
args.push(arg);
arg = [];
return;
}
if (token.type !== 31 /* TokenType.WHITESPACE_TOKEN */) {
arg.push(token);
}
});
if (arg.length) {
args.push(arg);
}
return args;
};
exports.parseFunctionArgs = parseFunctionArgs;
const isEndingTokenFor = (token, type) => {
if (type === 11 /* TokenType.LEFT_CURLY_BRACKET_TOKEN */ && token.type === 12 /* TokenType.RIGHT_CURLY_BRACKET_TOKEN */) {
return true;
}
if (type === 28 /* TokenType.LEFT_SQUARE_BRACKET_TOKEN */ && token.type === 29 /* TokenType.RIGHT_SQUARE_BRACKET_TOKEN */) {
return true;
}
return type === 2 /* TokenType.LEFT_PARENTHESIS_TOKEN */ && token.type === 3 /* TokenType.RIGHT_PARENTHESIS_TOKEN */;
};
//# sourceMappingURL=parser.js.map