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refactor(yaml): inline readBlockScalar() (#5841)
This commit is contained in:
Tim Reichen
GitHub
parent
baa5086dff
commit
cde346da13
@ -943,6 +943,162 @@ export class LoaderState {
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"Cannot read flow collection: unexpected end of the stream within a flow collection",
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);
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}
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// Handles block scaler styles: e.g. '|', '>', '|-' and '>-'.
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// https://yaml.org/spec/1.2.2/#81-block-scalar-styles
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readBlockScalar(nodeIndent: number): boolean {
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let chomping = CHOMPING_CLIP;
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let didReadContent = false;
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let detectedIndent = false;
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let textIndent = nodeIndent;
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let emptyLines = 0;
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let atMoreIndented = false;
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let ch = this.peek();
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let folding = false;
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if (ch === VERTICAL_LINE) {
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folding = false;
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} else if (ch === GREATER_THAN) {
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folding = true;
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} else {
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return false;
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}
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this.kind = "scalar";
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this.result = "";
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let tmp = 0;
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while (ch !== 0) {
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ch = this.next();
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if (ch === PLUS || ch === MINUS) {
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if (CHOMPING_CLIP === chomping) {
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chomping = ch === PLUS ? CHOMPING_KEEP : CHOMPING_STRIP;
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} else {
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return this.throwError(
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"Cannot read block: chomping mode identifier repeated",
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);
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}
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} else if ((tmp = decimalCharCodeToNumber(ch)) >= 0) {
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if (tmp === 0) {
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return this.throwError(
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"Cannot read block: indentation width must be greater than 0",
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);
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} else if (!detectedIndent) {
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textIndent = nodeIndent + tmp - 1;
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detectedIndent = true;
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} else {
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return this.throwError(
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"Cannot read block: indentation width identifier repeated",
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);
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}
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} else {
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break;
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}
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}
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if (isWhiteSpace(ch)) {
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do {
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ch = this.next();
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} while (isWhiteSpace(ch));
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if (ch === SHARP) {
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do {
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ch = this.next();
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} while (!isEOL(ch) && ch !== 0);
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}
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}
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while (ch !== 0) {
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this.readLineBreak();
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this.lineIndent = 0;
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ch = this.peek();
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while (
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(!detectedIndent || this.lineIndent < textIndent) &&
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ch === SPACE
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) {
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this.lineIndent++;
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ch = this.next();
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}
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if (!detectedIndent && this.lineIndent > textIndent) {
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textIndent = this.lineIndent;
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}
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if (isEOL(ch)) {
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emptyLines++;
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continue;
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}
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// End of the scalar.
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if (this.lineIndent < textIndent) {
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// Perform the chomping.
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if (chomping === CHOMPING_KEEP) {
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this.result += "\n".repeat(
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didReadContent ? 1 + emptyLines : emptyLines,
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);
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} else if (chomping === CHOMPING_CLIP) {
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if (didReadContent) {
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// i.e. only if the scalar is not empty.
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this.result += "\n";
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}
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}
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// Break this `while` cycle and go to the function's epilogue.
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break;
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}
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// Folded style: use fancy rules to handle line breaks.
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if (folding) {
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// Lines starting with white space characters (more-indented lines) are not folded.
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if (isWhiteSpace(ch)) {
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atMoreIndented = true;
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// except for the first content line (cf. Example 8.1)
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this.result += "\n".repeat(
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didReadContent ? 1 + emptyLines : emptyLines,
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);
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// End of more-indented block.
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} else if (atMoreIndented) {
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atMoreIndented = false;
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this.result += "\n".repeat(emptyLines + 1);
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// Just one line break - perceive as the same line.
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} else if (emptyLines === 0) {
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if (didReadContent) {
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// i.e. only if we have already read some scalar content.
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this.result += " ";
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}
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// Several line breaks - perceive as different lines.
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} else {
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this.result += "\n".repeat(emptyLines);
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}
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// Literal style: just add exact number of line breaks between content lines.
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} else {
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// Keep all line breaks except the header line break.
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this.result += "\n".repeat(
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didReadContent ? 1 + emptyLines : emptyLines,
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);
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}
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didReadContent = true;
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detectedIndent = true;
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emptyLines = 0;
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const captureStart = this.position;
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while (!isEOL(ch) && ch !== 0) {
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ch = this.next();
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}
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this.captureSegment(captureStart, this.position, false);
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}
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return true;
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}
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readDocument() {
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const documentStart = this.position;
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@ -1072,161 +1228,6 @@ export class LoaderState {
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}
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}
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// Handles block scaler styles: e.g. '|', '>', '|-' and '>-'.
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// https://yaml.org/spec/1.2.2/#81-block-scalar-styles
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function readBlockScalar(state: LoaderState, nodeIndent: number): boolean {
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let chomping = CHOMPING_CLIP;
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let didReadContent = false;
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let detectedIndent = false;
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let textIndent = nodeIndent;
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let emptyLines = 0;
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let atMoreIndented = false;
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let ch = state.peek();
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let folding = false;
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if (ch === VERTICAL_LINE) {
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folding = false;
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} else if (ch === GREATER_THAN) {
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folding = true;
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} else {
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return false;
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}
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state.kind = "scalar";
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state.result = "";
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let tmp = 0;
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while (ch !== 0) {
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ch = state.next();
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if (ch === PLUS || ch === MINUS) {
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if (CHOMPING_CLIP === chomping) {
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chomping = ch === PLUS ? CHOMPING_KEEP : CHOMPING_STRIP;
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} else {
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return state.throwError(
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"Cannot read block: chomping mode identifier repeated",
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);
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}
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} else if ((tmp = decimalCharCodeToNumber(ch)) >= 0) {
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if (tmp === 0) {
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return state.throwError(
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"Cannot read block: indentation width must be greater than 0",
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);
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} else if (!detectedIndent) {
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textIndent = nodeIndent + tmp - 1;
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detectedIndent = true;
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} else {
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return state.throwError(
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"Cannot read block: indentation width identifier repeated",
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);
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}
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} else {
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break;
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}
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}
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if (isWhiteSpace(ch)) {
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do {
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ch = state.next();
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} while (isWhiteSpace(ch));
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if (ch === SHARP) {
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do {
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ch = state.next();
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} while (!isEOL(ch) && ch !== 0);
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}
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}
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while (ch !== 0) {
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state.readLineBreak();
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state.lineIndent = 0;
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ch = state.peek();
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while (
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(!detectedIndent || state.lineIndent < textIndent) &&
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ch === SPACE
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) {
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state.lineIndent++;
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ch = state.next();
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}
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if (!detectedIndent && state.lineIndent > textIndent) {
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textIndent = state.lineIndent;
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}
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if (isEOL(ch)) {
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emptyLines++;
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continue;
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}
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// End of the scalar.
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if (state.lineIndent < textIndent) {
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// Perform the chomping.
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if (chomping === CHOMPING_KEEP) {
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state.result += "\n".repeat(
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didReadContent ? 1 + emptyLines : emptyLines,
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);
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} else if (chomping === CHOMPING_CLIP) {
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if (didReadContent) {
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// i.e. only if the scalar is not empty.
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state.result += "\n";
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}
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}
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// Break this `while` cycle and go to the function's epilogue.
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break;
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}
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// Folded style: use fancy rules to handle line breaks.
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if (folding) {
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// Lines starting with white space characters (more-indented lines) are not folded.
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if (isWhiteSpace(ch)) {
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atMoreIndented = true;
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// except for the first content line (cf. Example 8.1)
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state.result += "\n".repeat(
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didReadContent ? 1 + emptyLines : emptyLines,
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);
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// End of more-indented block.
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} else if (atMoreIndented) {
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atMoreIndented = false;
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state.result += "\n".repeat(emptyLines + 1);
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// Just one line break - perceive as the same line.
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} else if (emptyLines === 0) {
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if (didReadContent) {
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// i.e. only if we have already read some scalar content.
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state.result += " ";
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}
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// Several line breaks - perceive as different lines.
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} else {
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state.result += "\n".repeat(emptyLines);
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}
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// Literal style: just add exact number of line breaks between content lines.
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} else {
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// Keep all line breaks except the header line break.
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state.result += "\n".repeat(didReadContent ? 1 + emptyLines : emptyLines);
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}
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didReadContent = true;
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detectedIndent = true;
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emptyLines = 0;
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const captureStart = state.position;
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while (!isEOL(ch) && ch !== 0) {
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ch = state.next();
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}
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state.captureSegment(captureStart, state.position, false);
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}
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return true;
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}
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function readBlockMapping(
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state: LoaderState,
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nodeIndent: number,
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@ -1649,7 +1650,7 @@ function composeNode(
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hasContent = true;
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} else {
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if (
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(allowBlockScalars && readBlockScalar(state, flowIndent)) ||
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(allowBlockScalars && state.readBlockScalar(flowIndent)) ||
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state.readSingleQuotedScalar(flowIndent) ||
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state.readDoubleQuotedScalar(flowIndent)
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) {
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