6a9ffbcc
 liuqimichale
地图点击事件
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var SourceMapConsumer = require('source-map').SourceMapConsumer;
function inputSourceMapTracker() {
var maps = {};
return {
all: all.bind(null, maps),
isTracking: isTracking.bind(null, maps),
originalPositionFor: originalPositionFor.bind(null, maps),
track: track.bind(null, maps)
};
}
function all(maps) {
return maps;
}
function isTracking(maps, source) {
return source in maps;
}
function originalPositionFor(maps, metadata, range, selectorFallbacks) {
var line = metadata[0];
var column = metadata[1];
var source = metadata[2];
var position = {
line: line,
column: column + range
};
var originalPosition;
while (!originalPosition && position.column > column) {
position.column--;
originalPosition = maps[source].originalPositionFor(position);
}
if (!originalPosition || originalPosition.column < 0) {
return metadata;
}
if (originalPosition.line === null && line > 1 && selectorFallbacks > 0) {
return originalPositionFor(maps, [line - 1, column, source], range, selectorFallbacks - 1);
}
return originalPosition.line !== null ?
toMetadata(originalPosition) :
metadata;
}
function toMetadata(asHash) {
return [asHash.line, asHash.column, asHash.source];
}
function track(maps, source, data) {
maps[source] = new SourceMapConsumer(data);
}
module.exports = inputSourceMapTracker;
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