strong-arc
Version:
A visual suite for the StrongLoop API Platform
292 lines (262 loc) • 9.27 kB
JavaScript
/*
* Copyright (C) 2013 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.
*/
/**
* @constructor
* @param {string} content
* @param {!FormatterWorker.CSSFormattedContentBuilder} builder
*/
FormatterWorker.CSSFormatter = function(content, builder)
{
this._content = content;
this._builder = builder;
this._lastLine = -1;
this._state = {};
}
FormatterWorker.CSSFormatter.prototype = {
format: function()
{
this._lineEndings = this._lineEndings(this._content);
var tokenize = FormatterWorker.createTokenizer("text/css");
var lines = this._content.split("\n");
for (var i = 0; i < lines.length; ++i) {
var line = lines[i];
tokenize(line, this._tokenCallback.bind(this, i));
}
this._builder.flushNewLines(true);
},
/**
* @param {string} text
*/
_lineEndings: function(text)
{
var lineEndings = [];
var i = text.indexOf("\n");
while (i !== -1) {
lineEndings.push(i);
i = text.indexOf("\n", i + 1);
}
lineEndings.push(text.length);
return lineEndings;
},
/**
* @param {number} startLine
* @param {string} token
* @param {?string} type
* @param {number} startColumn
*/
_tokenCallback: function(startLine, token, type, startColumn)
{
if (startLine !== this._lastLine)
this._state.eatWhitespace = true;
if (/^property/.test(type) && !this._state.inPropertyValue)
this._state.seenProperty = true;
this._lastLine = startLine;
var isWhitespace = /^\s+$/.test(token);
if (isWhitespace) {
if (!this._state.eatWhitespace)
this._builder.addSpace();
return;
}
this._state.eatWhitespace = false;
if (token === "\n")
return;
if (token !== "}") {
if (this._state.afterClosingBrace)
this._builder.addNewLine();
this._state.afterClosingBrace = false;
}
var startPosition = (startLine ? this._lineEndings[startLine - 1] : 0) + startColumn;
if (token === "}") {
if (this._state.inPropertyValue)
this._builder.addNewLine();
this._builder.decreaseNestingLevel();
this._state.afterClosingBrace = true;
this._state.inPropertyValue = false;
} else if (token === ":" && !this._state.inPropertyValue && this._state.seenProperty) {
this._builder.addToken(token, startPosition, startLine, startColumn);
this._builder.addSpace();
this._state.eatWhitespace = true;
this._state.inPropertyValue = true;
this._state.seenProperty = false;
return;
} else if (token === "{") {
this._builder.addSpace();
this._builder.addToken(token, startPosition, startLine, startColumn);
this._builder.addNewLine();
this._builder.increaseNestingLevel();
return;
}
this._builder.addToken(token, startPosition, startLine, startColumn);
if (type === "comment" && !this._state.inPropertyValue && !this._state.seenProperty)
this._builder.addNewLine();
if (token === ";" && this._state.inPropertyValue) {
this._state.inPropertyValue = false;
this._builder.addNewLine();
} else if (token === "}") {
this._builder.addNewLine();
}
}
}
/**
* @constructor
* @param {string} content
* @param {!{original: !Array.<number>, formatted: !Array.<number>}} mapping
* @param {number} originalOffset
* @param {number} formattedOffset
* @param {string} indentString
*/
FormatterWorker.CSSFormattedContentBuilder = function(content, mapping, originalOffset, formattedOffset, indentString)
{
this._originalContent = content;
this._originalOffset = originalOffset;
this._lastOriginalPosition = 0;
this._formattedContent = [];
this._formattedContentLength = 0;
this._formattedOffset = formattedOffset;
this._lastFormattedPosition = 0;
this._mapping = mapping;
this._lineNumber = 0;
this._nestingLevel = 0;
this._needNewLines = 0;
this._atLineStart = true;
this._indentString = indentString;
this._cachedIndents = {};
}
FormatterWorker.CSSFormattedContentBuilder.prototype = {
/**
* @param {string} token
* @param {number} startPosition
* @param {number} startLine
* @param {number} startColumn
*/
addToken: function(token, startPosition, startLine, startColumn)
{
if ((this._isWhitespaceRun || this._atLineStart) && /^\s+$/.test(token))
return;
if (this._isWhitespaceRun && this._lineNumber === startLine && !this._needNewLines)
this._addText(" ");
this._isWhitespaceRun = false;
this._atLineStart = false;
while (this._lineNumber < startLine) {
this._addText("\n");
this._addIndent();
this._needNewLines = 0;
this._lineNumber += 1;
this._atLineStart = true;
}
if (this._needNewLines) {
this.flushNewLines();
this._addIndent();
this._atLineStart = true;
}
this._addMappingIfNeeded(startPosition);
this._addText(token);
this._lineNumber = startLine;
},
addSpace: function()
{
if (this._isWhitespaceRun)
return;
this._isWhitespaceRun = true;
},
addNewLine: function()
{
++this._needNewLines;
},
/**
* @param {boolean=} atLeastOne
*/
flushNewLines: function(atLeastOne)
{
var newLineCount = atLeastOne && !this._needNewLines ? 1 : this._needNewLines;
if (newLineCount)
this._isWhitespaceRun = false;
for (var i = 0; i < newLineCount; ++i)
this._addText("\n");
this._needNewLines = 0;
},
increaseNestingLevel: function()
{
this._nestingLevel += 1;
},
/**
* @param {boolean=} addNewline
*/
decreaseNestingLevel: function(addNewline)
{
if (this._nestingLevel)
this._nestingLevel -= 1;
if (addNewline)
this.addNewLine();
},
/**
* @return {string}
*/
content: function()
{
return this._formattedContent.join("");
},
_addIndent: function()
{
if (this._cachedIndents[this._nestingLevel]) {
this._addText(this._cachedIndents[this._nestingLevel]);
return;
}
var fullIndent = "";
for (var i = 0; i < this._nestingLevel; ++i)
fullIndent += this._indentString;
this._addText(fullIndent);
// Cache a maximum of 20 nesting level indents.
if (this._nestingLevel <= 20)
this._cachedIndents[this._nestingLevel] = fullIndent;
},
/**
* @param {string} text
*/
_addText: function(text)
{
if (!text)
return;
this._formattedContent.push(text);
this._formattedContentLength += text.length;
},
/**
* @param {number} originalPosition
*/
_addMappingIfNeeded: function(originalPosition)
{
if (originalPosition - this._lastOriginalPosition === this._formattedContentLength - this._lastFormattedPosition)
return;
this._mapping.original.push(this._originalOffset + originalPosition);
this._lastOriginalPosition = originalPosition;
this._mapping.formatted.push(this._formattedOffset + this._formattedContentLength);
this._lastFormattedPosition = this._formattedContentLength;
}
}