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'use strict';
const adoptBuffer = require('./adopt-buffer.cjs');
const charCodeDefinitions = require('./char-code-definitions.cjs');
const N = 10;
const F = 12;
const R = 13;
function computeLinesAndColumns(host) {
const source = host.source;
const sourceLength = source.length;
const startOffset = source.length > 0 ? charCodeDefinitions.isBOM(source.charCodeAt(0)) : 0;
const lines = adoptBuffer.adoptBuffer(host.lines, sourceLength);
const columns = adoptBuffer.adoptBuffer(host.columns, sourceLength);
let line = host.startLine;
let column = host.startColumn;
for (let i = startOffset; i < sourceLength; i++) {
const code = source.charCodeAt(i);
lines[i] = line;
columns[i] = column++;
if (code === N || code === R || code === F) {
if (code === R && i + 1 < sourceLength && source.charCodeAt(i + 1) === N) {
i++;
lines[i] = line;
columns[i] = column;
}
line++;
column = 1;
}
}
lines[sourceLength] = line;
columns[sourceLength] = column;
host.lines = lines;
host.columns = columns;
host.computed = true;
}
class OffsetToLocation {
constructor() {
this.lines = null;
this.columns = null;
this.computed = false;
}
setSource(source, startOffset = 0, startLine = 1, startColumn = 1) {
this.source = source;
this.startOffset = startOffset;
this.startLine = startLine;
this.startColumn = startColumn;
this.computed = false;
}
getLocation(offset, filename) {
if (!this.computed) {
computeLinesAndColumns(this);
}
return {
source: filename,
offset: this.startOffset + offset,
line: this.lines[offset],
column: this.columns[offset]
};
}
getLocationRange(start, end, filename) {
if (!this.computed) {
computeLinesAndColumns(this);
}
return {
source: filename,
start: {
offset: this.startOffset + start,
line: this.lines[start],
column: this.columns[start]
},
end: {
offset: this.startOffset + end,
line: this.lines[end],
column: this.columns[end]
}
};
}
}
exports.OffsetToLocation = OffsetToLocation;