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/*
Copyright 2015, Yahoo Inc.
Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
*/
"use strict";
var debug = require('debug')('istanbuljs'),
pathutils = require('./pathutils'),
libCoverage = require('istanbul-lib-coverage'),
MappedCoverage = require('./mapped').MappedCoverage;
function isInvalidPosition (pos) {
return !pos || typeof pos.line !== "number" || typeof pos.column !== "number" || pos.line < 0 || pos.column < 0;
}
/**
* determines the original position for a given location
* @param {SourceMapConsumer} sourceMap the source map
* @param {Object} location the original location Object
* @returns {Object} the remapped location Object
*/
function getMapping(sourceMap, location, origFile) {
if (!location) {
return null;
}
if (isInvalidPosition(location.start) || isInvalidPosition(location.end)) {
return null;
}
var start = sourceMap.originalPositionFor(location.start),
end = sourceMap.originalPositionFor(location.end);
/* istanbul ignore if: edge case too hard to test for */
if (!(start && end)) {
return null;
}
if (!(start.source && end.source)) {
return null;
}
if (start.source !== end.source) {
return null;
}
/* istanbul ignore if: edge case too hard to test for */
if (start.line === null || start.column === null) {
return null;
}
/* istanbul ignore if: edge case too hard to test for */
if (end.line === null || end.column === null) {
return null;
}
if (start.line === end.line && start.column === end.column) {
end = sourceMap.originalPositionFor({
line: location.end.line,
column: location.end.column,
bias: 2
});
end.column = end.column - 1;
}
return {
source: pathutils.relativeTo(start.source, origFile),
loc: {
start: {
line: start.line,
column: start.column
},
end: {
line: end.line,
column: end.column
}
}
};
}
function SourceMapTransformer(finder, opts) {
opts = opts || {};
this.finder = finder;
this.baseDir = opts.baseDir || process.cwd();
}
SourceMapTransformer.prototype.processFile = function (fc, sourceMap, coverageMapper) {
var changes = 0;
Object.keys(fc.statementMap).forEach(function (s) {
var loc = fc.statementMap[s],
hits = fc.s[s],
mapping = getMapping(sourceMap, loc, fc.path),
mappedCoverage;
if (mapping) {
changes += 1;
mappedCoverage = coverageMapper(mapping.source);
mappedCoverage.addStatement(mapping.loc, hits);
}
});
Object.keys(fc.fnMap).forEach(function (f) {
var fnMeta = fc.fnMap[f],
hits = fc.f[f],
mapping = getMapping(sourceMap, fnMeta.decl, fc.path),
spanMapping = getMapping(sourceMap, fnMeta.loc, fc.path),
mappedCoverage;
if (mapping && spanMapping && mapping.source === spanMapping.source) {
changes += 1;
mappedCoverage = coverageMapper(mapping.source);
mappedCoverage.addFunction(fnMeta.name, mapping.loc, spanMapping.loc, hits);
}
});
Object.keys(fc.branchMap).forEach(function (b) {
var branchMeta = fc.branchMap[b],
source,
hits = fc.b[b],
mapping,
locs = [],
mappedHits = [],
mappedCoverage,
skip,
i;
for (i = 0; i < branchMeta.locations.length; i += 1) {
mapping = getMapping(sourceMap, branchMeta.locations[i], fc.path);
if (mapping) {
if (!source) {
source = mapping.source;
}
if (mapping.source !== source) {
skip = true;
}
locs.push(mapping.loc);
mappedHits.push(hits[i]);
}
}
if (!skip && locs.length > 0) {
changes += 1;
mappedCoverage = coverageMapper(source);
mappedCoverage.addBranch(branchMeta.type, locs[0] /* XXX */, locs, mappedHits);
}
});
return changes > 0;
};
SourceMapTransformer.prototype.transform = function (coverageMap) {
var that = this,
finder = this.finder,
output = {},
getMappedCoverage = function (file) {
if (!output[file]) {
output[file] = new MappedCoverage(file);
}
return output[file];
};
coverageMap.files().forEach(function (file) {
var fc = coverageMap.fileCoverageFor(file),
sourceMap = finder(file),
changed;
if (!sourceMap) {
output[file] = fc;
return;
}
changed = that.processFile(fc, sourceMap, getMappedCoverage);
if (!changed) {
debug('File [' + file + '] ignored, nothing could be mapped');
}
});
return libCoverage.createCoverageMap(output);
};
module.exports = {
create: function (finder, opts) {
return new SourceMapTransformer(finder, opts);
}
};