/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/** * Get the source text offset equivalent to a given line/column pair. * * @param {Debugger.Source} source * @param {number} line The 1-based line number. * @param {number} column The 0-based column number. * @returns {number} The codepoint offset into the source's text.
*/ function findSourceOffset(source, line, column) { const offsets = getSourceLineOffsets(source); const offset = offsets[line - 1];
if (offset) { // Make sure that columns that technically don't exist in the line text // don't cause the offset to wrap to the next line. return Math.min(offset.start + column, offset.textEnd);
}
const NEWLINE = /(\r?\n|\r|\u2028|\u2029)/g; const SOURCE_OFFSETS = new WeakMap(); /** * Generate and cache line information for a given source to track what * text offsets mark the start and end of lines. Each entry in the array * represents a line in the source text. * * @param {Debugger.Source} source * @returns {Array<{ start, textEnd, end }>} * - start - The codepoint offset of the start of the line. * - textEnd - The codepoint offset just after the last non-newline character. * - end - The codepoint offset of the end of the line. This will be * be the same as the 'start' value of the next offset object, * and this includes the newlines for the line itself, where * 'textEnd' excludes newline characters.
*/ function getSourceLineOffsets(source) { const cached = SOURCE_OFFSETS.get(source); if (cached) { return cached;
}
const { text } = source;
const lines = text.split(NEWLINE);
const offsets = [];
let offset = 0; for (let i = 0; i < lines.length; i += 2) { const line = lines[i]; const start = offset;
// Calculate the end codepoint offset.
let end = offset; // eslint-disable-next-line no-unused-vars for (const c of line) {
end++;
} const textEnd = end;
if (i + 1 < lines.length) {
end += lines[i + 1].length;
}
offsets.push(Object.freeze({ start, textEnd, end }));
offset = end;
}
Object.freeze(offsets);
/** * Given a target actor and a source platform internal ID, * return the related SourceActor ID.
* @param TargetActor targetActor * The Target Actor from which this source originates. * @param String id * Platform Source ID * @return String * The SourceActor ID
*/ function getActorIdForInternalSourceId(targetActor, id) { const actor = targetActor.sourcesManager.getSourceActorByInternalSourceId(id); return actor ? actor.actorID : null;
}
exports.getActorIdForInternalSourceId = getActorIdForInternalSourceId;
