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feat: export parseTextDiff #415

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feat: export parseTextDiff #415

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91 changes: 47 additions & 44 deletions packages/jsondiffpatch/src/formatters/base.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -454,50 +454,7 @@ abstract class BaseFormatter<
return "unknown";
}

parseTextDiff(value: string) {
const output = [];
const lines = value.split("\n@@ ");
for (const line of lines) {
const lineOutput: {
pieces: LineOutputPiece[];
location?: LineOutputLocation;
} = {
pieces: [],
};
const location = /^(?:@@ )?[-+]?(\d+),(\d+)/.exec(line)?.slice(1);
if (!location) {
throw new Error("invalid text diff format");
}
assertArrayHasAtLeast2(location);
lineOutput.location = {
line: location[0],
chr: location[1],
};
const pieces = line.split("\n").slice(1);
for (
let pieceIndex = 0, piecesLength = pieces.length;
pieceIndex < piecesLength;
pieceIndex++
) {
const piece = pieces[pieceIndex];
if (piece === undefined || !piece.length) {
continue;
}
const pieceOutput: Partial<LineOutputPiece> = {
type: "context",
};
if (piece.substring(0, 1) === "+") {
pieceOutput.type = "added";
} else if (piece.substring(0, 1) === "-") {
pieceOutput.type = "deleted";
}
pieceOutput.text = piece.slice(1);
lineOutput.pieces.push(pieceOutput as LineOutputPiece);
}
output.push(lineOutput as LineOutput);
}
return output;
}
parseTextDiff = parseTextDiff;

abstract rootBegin(
context: TContext,
Expand Down Expand Up @@ -602,4 +559,50 @@ abstract class BaseFormatter<
): void;
}

export function parseTextDiff(value: string) {
const output = [];
const lines = value.split("\n@@ ");
for (const line of lines) {
const lineOutput: {
pieces: LineOutputPiece[];
location?: LineOutputLocation;
} = {
pieces: [],
};
const location = /^(?:@@ )?[-+]?(\d+),(\d+)/.exec(line)?.slice(1);
if (!location) {
throw new Error("invalid text diff format");
}
assertArrayHasAtLeast2(location);
lineOutput.location = {
line: location[0],
chr: location[1],
};
const pieces = line.split("\n").slice(1);
for (
let pieceIndex = 0, piecesLength = pieces.length;
pieceIndex < piecesLength;
pieceIndex++
) {
const piece = pieces[pieceIndex];
if (piece === undefined || !piece.length) {
continue;
}
const pieceOutput: Partial<LineOutputPiece> = {
type: "context",
};
if (piece.substring(0, 1) === "+") {
pieceOutput.type = "added";
} else if (piece.substring(0, 1) === "-") {
pieceOutput.type = "deleted";
}
pieceOutput.text = piece.slice(1);
lineOutput.pieces.push(pieceOutput as LineOutputPiece);
}
output.push(lineOutput as LineOutput);
}
return output;
}


export default BaseFormatter;