Function diffview

api/diffview.ts:4–1393

(options : any)

(function diffview_init(): void {
    "use strict";
    const diffview = function diffview_(options : any): [string, number, number]{
        const tab: string = (function diffview_tab(): string {
                let a: number = 0;
                const output: string[] = [];
                if (options.indent_char === "" || options.indent_size < 1) {
                    return "";
                }
                do {
                    output.push(options.indent_char);
                    a = a + 1;
                } while (a < options.indent_size);
                return output.join("");
            }()),
            // translates source code from a string to an array by splitting on line breaks
            stringAsLines = function diffview_stringAsLines(str : string): string[]{
                const lines = (options.diff_format === "text")
                    ? str
                    : str
                        .replace(/&/g, "&amp;")
                        .replace(/&#lt;/g, "$#lt;")
                        .replace(/&#gt;/g, "$#gt;")
                        .replace(/</g, "$#lt;")
                        .replace(/>/g, "$#gt;");
                if (options.crlf === true) {
                    return lines.split("\r\n");
                }
                return lines.split("\n");
            },
            // array representation of base source
            baseTextArray: string[] = (typeof options.source === "string")
                ? stringAsLines(options.source)
                : options.source,
            // array representation of new source
            newTextArray: string[] = (typeof options.diff === "string")
                ? stringAsLines(options.diff)
                : options.diff,
            codeBuild = function diffview_opcodes(): opcodes {
                const table: difftable = {},
                    one: string[] = baseTextArray,
                    two: string[] = newTextArray;
                let lena: number = one.length,
                    lenb: number = two.length,
                    a: number = 0,
                    b: number = 0,
                    c: number = 0,
                    d: number = 0,
                    codes: opcodes = [],
                    fix = function diffview_opcodes_fix(code:codes): void {
                        let len:number = codes.length - 1,
                            prior:[string, number, number, number, number] = codes[len];
                        if (prior !== undefined) {
                            if (prior[0] === code[0]) {
                                if (code[0] === "replace" || code[0] === "equal") {
                                    prior[2] = code[2];
                                    prior[4] = code[4];
                                } else if (code[0] === "delete") {
                                    prior[2] = code[2];
                                } else if (code[0] === "insert") {