package.lib.decode.d.ts Maven / Gradle / Ivy
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Encode & decode XML and HTML entities with ease & speed
import htmlDecodeTree from "./generated/decode-data-html.js";
import xmlDecodeTree from "./generated/decode-data-xml.js";
import decodeCodePoint from "./decode_codepoint.js";
export { htmlDecodeTree, xmlDecodeTree, decodeCodePoint };
export { replaceCodePoint, fromCodePoint } from "./decode_codepoint.js";
export declare enum BinTrieFlags {
VALUE_LENGTH = 49152,
BRANCH_LENGTH = 16256,
JUMP_TABLE = 127
}
export declare enum DecodingMode {
/** Entities in text nodes that can end with any character. */
Legacy = 0,
/** Only allow entities terminated with a semicolon. */
Strict = 1,
/** Entities in attributes have limitations on ending characters. */
Attribute = 2
}
/**
* Producers for character reference errors as defined in the HTML spec.
*/
export interface EntityErrorProducer {
missingSemicolonAfterCharacterReference(): void;
absenceOfDigitsInNumericCharacterReference(consumedCharacters: number): void;
validateNumericCharacterReference(code: number): void;
}
/**
* Token decoder with support of writing partial entities.
*/
export declare class EntityDecoder {
/** The tree used to decode entities. */
private readonly decodeTree;
/**
* The function that is called when a codepoint is decoded.
*
* For multi-byte named entities, this will be called multiple times,
* with the second codepoint, and the same `consumed` value.
*
* @param codepoint The decoded codepoint.
* @param consumed The number of bytes consumed by the decoder.
*/
private readonly emitCodePoint;
/** An object that is used to produce errors. */
private readonly errors?;
constructor(
/** The tree used to decode entities. */
decodeTree: Uint16Array,
/**
* The function that is called when a codepoint is decoded.
*
* For multi-byte named entities, this will be called multiple times,
* with the second codepoint, and the same `consumed` value.
*
* @param codepoint The decoded codepoint.
* @param consumed The number of bytes consumed by the decoder.
*/
emitCodePoint: (cp: number, consumed: number) => void,
/** An object that is used to produce errors. */
errors?: EntityErrorProducer | undefined);
/** The current state of the decoder. */
private state;
/** Characters that were consumed while parsing an entity. */
private consumed;
/**
* The result of the entity.
*
* Either the result index of a numeric entity, or the codepoint of a
* numeric entity.
*/
private result;
/** The current index in the decode tree. */
private treeIndex;
/** The number of characters that were consumed in excess. */
private excess;
/** The mode in which the decoder is operating. */
private decodeMode;
/** Resets the instance to make it reusable. */
startEntity(decodeMode: DecodingMode): void;
/**
* Write an entity to the decoder. This can be called multiple times with partial entities.
* If the entity is incomplete, the decoder will return -1.
*
* Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the
* entity is incomplete, and resume when the next string is written.
*
* @param string The string containing the entity (or a continuation of the entity).
* @param offset The offset at which the entity begins. Should be 0 if this is not the first call.
* @returns The number of characters that were consumed, or -1 if the entity is incomplete.
*/
write(str: string, offset: number): number;
/**
* Switches between the numeric decimal and hexadecimal states.
*
* Equivalent to the `Numeric character reference state` in the HTML spec.
*
* @param str The string containing the entity (or a continuation of the entity).
* @param offset The current offset.
* @returns The number of characters that were consumed, or -1 if the entity is incomplete.
*/
private stateNumericStart;
private addToNumericResult;
/**
* Parses a hexadecimal numeric entity.
*
* Equivalent to the `Hexademical character reference state` in the HTML spec.
*
* @param str The string containing the entity (or a continuation of the entity).
* @param offset The current offset.
* @returns The number of characters that were consumed, or -1 if the entity is incomplete.
*/
private stateNumericHex;
/**
* Parses a decimal numeric entity.
*
* Equivalent to the `Decimal character reference state` in the HTML spec.
*
* @param str The string containing the entity (or a continuation of the entity).
* @param offset The current offset.
* @returns The number of characters that were consumed, or -1 if the entity is incomplete.
*/
private stateNumericDecimal;
/**
* Validate and emit a numeric entity.
*
* Implements the logic from the `Hexademical character reference start
* state` and `Numeric character reference end state` in the HTML spec.
*
* @param lastCp The last code point of the entity. Used to see if the
* entity was terminated with a semicolon.
* @param expectedLength The minimum number of characters that should be
* consumed. Used to validate that at least one digit
* was consumed.
* @returns The number of characters that were consumed.
*/
private emitNumericEntity;
/**
* Parses a named entity.
*
* Equivalent to the `Named character reference state` in the HTML spec.
*
* @param str The string containing the entity (or a continuation of the entity).
* @param offset The current offset.
* @returns The number of characters that were consumed, or -1 if the entity is incomplete.
*/
private stateNamedEntity;
/**
* Emit a named entity that was not terminated with a semicolon.
*
* @returns The number of characters consumed.
*/
private emitNotTerminatedNamedEntity;
/**
* Emit a named entity.
*
* @param result The index of the entity in the decode tree.
* @param valueLength The number of bytes in the entity.
* @param consumed The number of characters consumed.
*
* @returns The number of characters consumed.
*/
private emitNamedEntityData;
/**
* Signal to the parser that the end of the input was reached.
*
* Remaining data will be emitted and relevant errors will be produced.
*
* @returns The number of characters consumed.
*/
end(): number;
}
/**
* Determines the branch of the current node that is taken given the current
* character. This function is used to traverse the trie.
*
* @param decodeTree The trie.
* @param current The current node.
* @param nodeIdx The index right after the current node and its value.
* @param char The current character.
* @returns The index of the next node, or -1 if no branch is taken.
*/
export declare function determineBranch(decodeTree: Uint16Array, current: number, nodeIdx: number, char: number): number;
/**
* Decodes an HTML string.
*
* @param str The string to decode.
* @param mode The decoding mode.
* @returns The decoded string.
*/
export declare function decodeHTML(str: string, mode?: DecodingMode): string;
/**
* Decodes an HTML string in an attribute.
*
* @param str The string to decode.
* @returns The decoded string.
*/
export declare function decodeHTMLAttribute(str: string): string;
/**
* Decodes an HTML string, requiring all entities to be terminated by a semicolon.
*
* @param str The string to decode.
* @returns The decoded string.
*/
export declare function decodeHTMLStrict(str: string): string;
/**
* Decodes an XML string, requiring all entities to be terminated by a semicolon.
*
* @param str The string to decode.
* @returns The decoded string.
*/
export declare function decodeXML(str: string): string;
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