sql-formatter
Version:
Format whitespace in a SQL query to make it more readable
70 lines • 1.95 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const utils_js_1 = require("../utils.js");
const INDENT_TYPE_TOP_LEVEL = 'top-level';
const INDENT_TYPE_BLOCK_LEVEL = 'block-level';
/**
* Manages indentation levels.
*
* There are two types of indentation levels:
*
* - BLOCK_LEVEL : increased by open-parenthesis
* - TOP_LEVEL : increased by RESERVED_CLAUSE words
*/
class Indentation {
/**
* @param {string} indent A string to indent with
*/
constructor(indent) {
this.indent = indent;
this.indentTypes = [];
}
/**
* Returns indentation string for single indentation step.
*/
getSingleIndent() {
return this.indent;
}
/**
* Returns current indentation level
*/
getLevel() {
return this.indentTypes.length;
}
/**
* Increases indentation by one top-level indent.
*/
increaseTopLevel() {
this.indentTypes.push(INDENT_TYPE_TOP_LEVEL);
}
/**
* Increases indentation by one block-level indent.
*/
increaseBlockLevel() {
this.indentTypes.push(INDENT_TYPE_BLOCK_LEVEL);
}
/**
* Decreases indentation by one top-level indent.
* Does nothing when the previous indent is not top-level.
*/
decreaseTopLevel() {
if (this.indentTypes.length > 0 && (0, utils_js_1.last)(this.indentTypes) === INDENT_TYPE_TOP_LEVEL) {
this.indentTypes.pop();
}
}
/**
* Decreases indentation by one block-level indent.
* If there are top-level indents within the block-level indent,
* throws away these as well.
*/
decreaseBlockLevel() {
while (this.indentTypes.length > 0) {
const type = this.indentTypes.pop();
if (type !== INDENT_TYPE_TOP_LEVEL) {
break;
}
}
}
}
exports.default = Indentation;
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