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Update source mappings to exclude filtered files.
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Han van Venrooij
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Dec 26, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * Copyright 2015 Han van Venrooij | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package org.irundaia.base64 | ||
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| import scala.annotation.tailrec | ||
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| object Base64VLQ { | ||
|
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| private val baseShift = 5 | ||
| private val base = 1 << baseShift | ||
| private val baseMask = base - 1 | ||
| private val continuationBit = base | ||
| private val base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" | ||
| private val base64CharMap = base64Chars.zipWithIndex.toMap | ||
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| def decode(encoded: String): Seq[Int] = { | ||
| val digits = encoded.map(base64CharMap) | ||
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| digits.foldLeft((Seq[Int](), 0, 0)){ | ||
| case ((values, currentValue, shift), nextDigit) => | ||
| val resultValue = currentValue + (decodedValue(nextDigit) << shift) | ||
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| if (shouldContinueDecode(nextDigit)) { | ||
| (values, resultValue, shift + baseShift) | ||
| } else { | ||
| if (shouldNegateDecodedValue(resultValue)) { | ||
| (values ++ Seq(-(resultValue >> 1)), 0, 0) | ||
| } else { | ||
| (values ++ Seq(resultValue >> 1), 0, 0) | ||
| } | ||
| } | ||
| }._1 | ||
| } | ||
|
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| def encode(value: Int): String = { | ||
| val toEncodeValue = if (value < 0) | ||
| ((-value) << 1) | 1 | ||
| else | ||
| value << 1 | ||
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| encodePartial(toEncodeValue) | ||
| } | ||
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| @tailrec private def encodePartial(value: Int, acc: String = ""): String = { | ||
| val digit = value & baseMask | ||
| val nextValue = value >>> baseShift | ||
| val base64Char = base64Chars(if (nextValue > 0) digit | continuationBit else digit) | ||
|
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| if (nextValue > 0) | ||
| encodePartial(nextValue, acc + base64Char) | ||
| else | ||
| acc + base64Char | ||
| } | ||
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| private def shouldContinueDecode(digit: Int): Boolean = (digit & continuationBit) > 0 | ||
| private def shouldNegateDecodedValue(value: Int): Boolean = (value & 1) > 0 | ||
| private def decodedValue(digit: Int): Int = digit & baseMask | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| /* | ||
| * Copyright 2015 Han van Venrooij | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package org.irundaia.sourcemap | ||
|
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| import org.irundaia.base64.Base64VLQ | ||
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| case class SourceMapping(sourceFileIndex: Int, sourceLine: Int, sourceColumn: Int, targetLine: Int, targetColumn: Int) | ||
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| object SourceMapping { | ||
| private val lineSeparator = ";" | ||
| private val segmentSeparator = "," | ||
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| def decode(input: String): Seq[SourceMapping] = { | ||
| input.split(lineSeparator).toSeq.zipWithIndex.map(decodeLine).reduce(_ ++ _) | ||
| } | ||
|
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| private def doDecodeLine(line: String, targetLine: Int): Seq[SourceMapping] = { | ||
| if (line.isEmpty) | ||
| Seq() | ||
| else { | ||
| val segments = line.split(segmentSeparator).toSeq.map(decodeSegment) | ||
| segments.foldLeft(Seq[SourceMapping]()) { | ||
| case | ||
| (mappings, (targetColumnIncrement, sourceFileIncrement, sourceLineIncrement, sourceColumnIncrement)) => | ||
| val prevMapping = mappings.headOption.getOrElse(SourceMapping(0, 0, 0, targetLine, 0)) | ||
| val nextTargetColumn = prevMapping.targetColumn + targetColumnIncrement | ||
| val nextSourceIndex = prevMapping.sourceFileIndex + sourceFileIncrement | ||
| val nextSourceLine = prevMapping.sourceLine + sourceLineIncrement | ||
| val nextSourceColumn = prevMapping.sourceColumn + sourceColumnIncrement | ||
|
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| SourceMapping(nextSourceIndex, nextSourceLine, nextSourceColumn, targetLine, nextTargetColumn) +: mappings | ||
| }.reverse | ||
| } | ||
| } | ||
| private def decodeLine = (doDecodeLine _).tupled | ||
|
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| private def decodeSegment(segment: String): (Int, Int, Int, Int) = { | ||
| val foundValues = Base64VLQ.decode(segment) | ||
|
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| (foundValues(0), foundValues(1), foundValues(2), foundValues(3)) | ||
| } | ||
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| def encode(mappings: Seq[SourceMapping]): String = mappings.groupBy(_.targetLine).mapValues(encodeLine).values.mkString(lineSeparator) | ||
|
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| private def encodeLine(mappings: Seq[SourceMapping]): String = | ||
| mappings.foldLeft((Seq[String](), SourceMapping(0, 0, 0, 0, 0))){ | ||
| case ((encodedSegments, previousMapping), nextMapping) => (encodeSegment(nextMapping, previousMapping) +: encodedSegments, nextMapping) | ||
| }._1.reverse.mkString(segmentSeparator) | ||
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| private def encodeSegment(currentMapping: SourceMapping, previousMapping: SourceMapping): String = { | ||
| val toBeEncodedValues = Seq( | ||
| currentMapping.targetColumn - previousMapping.targetColumn, // Target column increment | ||
| currentMapping.sourceFileIndex - previousMapping.sourceFileIndex, // Source file increment | ||
| currentMapping.sourceLine - previousMapping.sourceLine, // Source line increment | ||
| currentMapping.sourceColumn - previousMapping.sourceColumn // Source column increment | ||
| ) | ||
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| toBeEncodedValues.map(Base64VLQ.encode).mkString("") | ||
| } | ||
| } |