lts/deps/v8/tools/SourceMap.js
// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This is a copy from blink dev tools, see:
// http://src.chromium.org/viewvc/blink/trunk/Source/devtools/front_end/SourceMap.js
// revision: 153407
// Added to make the file work without dev tools
WebInspector = {};
WebInspector.ParsedURL = {};
WebInspector.ParsedURL.completeURL = function(){};
// start of original file content
/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Implements Source Map V3 model. See http://code.google.com/p/closure-compiler/wiki/SourceMaps
* for format description.
* @constructor
* @param {string} sourceMappingURL
* @param {SourceMapV3} payload
*/
WebInspector.SourceMap = function(sourceMappingURL, payload)
{
if (!WebInspector.SourceMap.prototype._base64Map) {
const base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
WebInspector.SourceMap.prototype._base64Map = {};
for (var i = 0; i < base64Digits.length; ++i)
WebInspector.SourceMap.prototype._base64Map[base64Digits.charAt(i)] = i;
}
this._sourceMappingURL = sourceMappingURL;
this._reverseMappingsBySourceURL = {};
this._mappings = [];
this._sources = {};
this._sourceContentByURL = {};
this._parseMappingPayload(payload);
}
/**
* @param {string} sourceMapURL
* @param {string} compiledURL
* @param {function(WebInspector.SourceMap)} callback
*/
WebInspector.SourceMap.load = function(sourceMapURL, compiledURL, callback)
{
NetworkAgent.loadResourceForFrontend(WebInspector.resourceTreeModel.mainFrame.id, sourceMapURL, undefined, contentLoaded.bind(this));
/**
* @param {?Protocol.Error} error
* @param {number} statusCode
* @param {NetworkAgent.Headers} headers
* @param {string} content
*/
function contentLoaded(error, statusCode, headers, content)
{
if (error || !content || statusCode >= 400) {
console.error("Could not load content for " + sourceMapURL + " : " + (error || ("HTTP status code: " + statusCode)));
callback(null);
return;
}
if (content.slice(0, 3) === ")]}")
content = content.substring(content.indexOf('\n'));
try {
var payload = /** @type {SourceMapV3} */ (JSON.parse(content));
var baseURL = sourceMapURL.startsWith("data:") ? compiledURL : sourceMapURL;
callback(new WebInspector.SourceMap(baseURL, payload));
} catch(e) {
console.error(e.message);
callback(null);
}
}
}
WebInspector.SourceMap.prototype = {
/**
* @return {Array.<string>}
*/
sources: function()
{
return Object.keys(this._sources);
},
/**
* @param {string} sourceURL
* @return {string|undefined}
*/
sourceContent: function(sourceURL)
{
return this._sourceContentByURL[sourceURL];
},
/**
* @param {string} sourceURL
* @param {WebInspector.ResourceType} contentType
* @return {WebInspector.ContentProvider}
*/
sourceContentProvider: function(sourceURL, contentType)
{
var lastIndexOfDot = sourceURL.lastIndexOf(".");
var extension = lastIndexOfDot !== -1 ? sourceURL.substr(lastIndexOfDot + 1) : "";
var mimeType = WebInspector.ResourceType.mimeTypesForExtensions[extension.toLowerCase()];
var sourceContent = this.sourceContent(sourceURL);
if (sourceContent)
return new WebInspector.StaticContentProvider(contentType, sourceContent, mimeType);
return new WebInspector.CompilerSourceMappingContentProvider(sourceURL, contentType, mimeType);
},
/**
* @param {SourceMapV3} mappingPayload
*/
_parseMappingPayload: function(mappingPayload)
{
if (mappingPayload.sections)
this._parseSections(mappingPayload.sections);
else
this._parseMap(mappingPayload, 0, 0);
},
/**
* @param {Array.<SourceMapV3.Section>} sections
*/
_parseSections: function(sections)
{
for (var i = 0; i < sections.length; ++i) {
var section = sections[i];
this._parseMap(section.map, section.offset.line, section.offset.column);
}
},
/**
* @param {number} lineNumber in compiled resource
* @param {number} columnNumber in compiled resource
* @return {?Array}
*/
findEntry: function(lineNumber, columnNumber)
{
var first = 0;
var count = this._mappings.length;
while (count > 1) {
var step = count >> 1;
var middle = first + step;
var mapping = this._mappings[middle];
if (lineNumber < mapping[0] || (lineNumber === mapping[0] && columnNumber < mapping[1]))
count = step;
else {
first = middle;
count -= step;
}
}
var entry = this._mappings[first];
if (!first && entry && (lineNumber < entry[0] || (lineNumber === entry[0] && columnNumber < entry[1])))
return null;
return entry;
},
/**
* @param {string} sourceURL of the originating resource
* @param {number} lineNumber in the originating resource
* @return {Array}
*/
findEntryReversed: function(sourceURL, lineNumber)
{
var mappings = this._reverseMappingsBySourceURL[sourceURL];
for ( ; lineNumber < mappings.length; ++lineNumber) {
var mapping = mappings[lineNumber];
if (mapping)
return mapping;
}
return this._mappings[0];
},
/**
* @override
*/
_parseMap: function(map, lineNumber, columnNumber)
{
var sourceIndex = 0;
var sourceLineNumber = 0;
var sourceColumnNumber = 0;
var nameIndex = 0;
var sources = [];
var originalToCanonicalURLMap = {};
for (var i = 0; i < map.sources.length; ++i) {
var originalSourceURL = map.sources[i];
var sourceRoot = map.sourceRoot || "";
if (sourceRoot && !sourceRoot.endsWith("/"))
sourceRoot += "/";
var href = sourceRoot + originalSourceURL;
var url = WebInspector.ParsedURL.completeURL(this._sourceMappingURL, href) || href;
originalToCanonicalURLMap[originalSourceURL] = url;
sources.push(url);
this._sources[url] = true;
if (map.sourcesContent && map.sourcesContent[i])
this._sourceContentByURL[url] = map.sourcesContent[i];
}
var stringCharIterator = new WebInspector.SourceMap.StringCharIterator(map.mappings);
var sourceURL = sources[sourceIndex];
while (true) {
if (stringCharIterator.peek() === ",")
stringCharIterator.next();
else {
while (stringCharIterator.peek() === ";") {
lineNumber += 1;
columnNumber = 0;
stringCharIterator.next();
}
if (!stringCharIterator.hasNext())
break;
}
columnNumber += this._decodeVLQ(stringCharIterator);
if (this._isSeparator(stringCharIterator.peek())) {
this._mappings.push([lineNumber, columnNumber]);
continue;
}
var sourceIndexDelta = this._decodeVLQ(stringCharIterator);
if (sourceIndexDelta) {
sourceIndex += sourceIndexDelta;
sourceURL = sources[sourceIndex];
}
sourceLineNumber += this._decodeVLQ(stringCharIterator);
sourceColumnNumber += this._decodeVLQ(stringCharIterator);
if (!this._isSeparator(stringCharIterator.peek()))
nameIndex += this._decodeVLQ(stringCharIterator);
this._mappings.push([lineNumber, columnNumber, sourceURL, sourceLineNumber, sourceColumnNumber]);
}
for (var i = 0; i < this._mappings.length; ++i) {
var mapping = this._mappings[i];
var url = mapping[2];
if (!url)
continue;
if (!this._reverseMappingsBySourceURL[url])
this._reverseMappingsBySourceURL[url] = [];
var reverseMappings = this._reverseMappingsBySourceURL[url];
var sourceLine = mapping[3];
if (!reverseMappings[sourceLine])
reverseMappings[sourceLine] = [mapping[0], mapping[1]];
}
},
/**
* @param {string} char
* @return {boolean}
*/
_isSeparator: function(char)
{
return char === "," || char === ";";
},
/**
* @param {WebInspector.SourceMap.StringCharIterator} stringCharIterator
* @return {number}
*/
_decodeVLQ: function(stringCharIterator)
{
// Read unsigned value.
var result = 0;
var shift = 0;
do {
var digit = this._base64Map[stringCharIterator.next()];
result += (digit & this._VLQ_BASE_MASK) << shift;
shift += this._VLQ_BASE_SHIFT;
} while (digit & this._VLQ_CONTINUATION_MASK);
// Fix the sign.
var negative = result & 1;
result >>= 1;
return negative ? -result : result;
},
_VLQ_BASE_SHIFT: 5,
_VLQ_BASE_MASK: (1 << 5) - 1,
_VLQ_CONTINUATION_MASK: 1 << 5
}
/**
* @constructor
* @param {string} string
*/
WebInspector.SourceMap.StringCharIterator = function(string)
{
this._string = string;
this._position = 0;
}
WebInspector.SourceMap.StringCharIterator.prototype = {
/**
* @return {string}
*/
next: function()
{
return this._string.charAt(this._position++);
},
/**
* @return {string}
*/
peek: function()
{
return this._string.charAt(this._position);
},
/**
* @return {boolean}
*/
hasNext: function()
{
return this._position < this._string.length;
}
}