ScriptFormatter.js [plain text]
WebInspector.ScriptFormatter = function()
{
this._worker = new Worker("ScriptFormatterWorker.js");
this._worker.onmessage = this._didFormatContent.bind(this);
this._tasks = [];
}
WebInspector.ScriptFormatter.locationToPosition = function(lineEndings, location)
{
var position = location.lineNumber ? lineEndings[location.lineNumber - 1] + 1 : 0;
return position + location.columnNumber;
}
WebInspector.ScriptFormatter.positionToLocation = function(lineEndings, position)
{
var location = {};
location.lineNumber = lineEndings.upperBound(position - 1);
if (!location.lineNumber)
location.columnNumber = position;
else
location.columnNumber = position - lineEndings[location.lineNumber - 1] - 1;
return location;
}
WebInspector.ScriptFormatter.prototype = {
formatContent: function(mimeType, content, callback)
{
content = content.replace(/\r\n?|[\n\u2028\u2029]/g, "\n").replace(/^\uFEFF/, '');
var data = { mimeType: mimeType, content: content };
this._tasks.push({ data: data, callback: callback });
this._worker.postMessage(data);
},
_didFormatContent: function(event)
{
var task = this._tasks.shift();
var originalContent = task.data.content;
var formattedContent = event.data.content;
var sourceMapping = new WebInspector.FormattedSourceMapping(originalContent.lineEndings(), formattedContent.lineEndings(), event.data.mapping);
task.callback(formattedContent, sourceMapping);
}
}
WebInspector.FormattedSourceMapping = function(originalLineEndings, formattedLineEndings, mapping)
{
this._originalLineEndings = originalLineEndings;
this._formattedLineEndings = formattedLineEndings;
this._mapping = mapping;
}
WebInspector.FormattedSourceMapping.prototype = {
originalToFormatted: function(location)
{
var originalPosition = WebInspector.ScriptFormatter.locationToPosition(this._originalLineEndings, location);
var formattedPosition = this._convertPosition(this._mapping.original, this._mapping.formatted, originalPosition);
return WebInspector.ScriptFormatter.positionToLocation(this._formattedLineEndings, formattedPosition);
},
formattedToOriginal: function(location)
{
var formattedPosition = WebInspector.ScriptFormatter.locationToPosition(this._formattedLineEndings, location);
var originalPosition = this._convertPosition(this._mapping.formatted, this._mapping.original, formattedPosition);
return WebInspector.ScriptFormatter.positionToLocation(this._originalLineEndings, originalPosition);
},
_convertPosition: function(positions1, positions2, position)
{
var index = positions1.upperBound(position) - 1;
var convertedPosition = positions2[index] + position - positions1[index];
if (index < positions2.length - 1 && convertedPosition > positions2[index + 1])
convertedPosition = positions2[index + 1];
return convertedPosition;
}
}