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| 1 /* |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
| 3 * |
| 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are |
| 6 * met: |
| 7 * |
| 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above |
| 11 * copyright notice, this list of conditions and the following disclaimer |
| 12 * in the documentation and/or other materials provided with the |
| 13 * distribution. |
| 14 * * Neither the name of Google Inc. nor the names of its |
| 15 * contributors may be used to endorse or promote products derived from |
| 16 * this software without specific prior written permission. |
| 17 * |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ |
| 30 |
| 31 /** |
| 32 * @constructor |
| 33 * @param {string} content |
| 34 * @param {!FormatterWorker.CSSFormattedContentBuilder} builder |
| 35 */ |
| 36 FormatterWorker.CSSFormatter = function(content, builder) |
| 37 { |
| 38 this._content = content; |
| 39 this._builder = builder; |
| 40 this._lastLine = -1; |
| 41 this._state = {}; |
| 42 } |
| 43 |
| 44 FormatterWorker.CSSFormatter.prototype = { |
| 45 format: function() |
| 46 { |
| 47 this._lineEndings = this._lineEndings(this._content); |
| 48 var tokenize = WebInspector.CodeMirrorUtils.createTokenizer("text/css"); |
| 49 var lines = this._content.split("\n"); |
| 50 |
| 51 for (var i = 0; i < lines.length; ++i) { |
| 52 var line = lines[i]; |
| 53 tokenize(line, this._tokenCallback.bind(this, i)); |
| 54 } |
| 55 this._builder.flushNewLines(true); |
| 56 }, |
| 57 |
| 58 /** |
| 59 * @param {string} text |
| 60 */ |
| 61 _lineEndings: function(text) |
| 62 { |
| 63 var lineEndings = []; |
| 64 var i = text.indexOf("\n"); |
| 65 while (i !== -1) { |
| 66 lineEndings.push(i); |
| 67 i = text.indexOf("\n", i + 1); |
| 68 } |
| 69 lineEndings.push(text.length); |
| 70 return lineEndings; |
| 71 }, |
| 72 |
| 73 /** |
| 74 * @param {number} startLine |
| 75 * @param {string} token |
| 76 * @param {string} type |
| 77 * @param {number} startColumn |
| 78 */ |
| 79 _tokenCallback: function(startLine, token, type, startColumn) |
| 80 { |
| 81 if (startLine !== this._lastLine) |
| 82 this._state.eatWhitespace = true; |
| 83 if (/^css-property/.test(type) && !this._state.inPropertyValue) |
| 84 this._state.seenProperty = true; |
| 85 this._lastLine = startLine; |
| 86 var isWhitespace = /^\s+$/.test(token); |
| 87 if (isWhitespace) { |
| 88 if (!this._state.eatWhitespace) |
| 89 this._builder.addSpace(); |
| 90 return; |
| 91 } |
| 92 this._state.eatWhitespace = false; |
| 93 if (token === "\n") |
| 94 return; |
| 95 |
| 96 if (token !== "}") { |
| 97 if (this._state.afterClosingBrace) |
| 98 this._builder.addNewLine(); |
| 99 this._state.afterClosingBrace = false; |
| 100 } |
| 101 var startPosition = (startLine ? this._lineEndings[startLine - 1] : 0) +
startColumn; |
| 102 if (token === "}") { |
| 103 if (this._state.inPropertyValue) |
| 104 this._builder.addNewLine(); |
| 105 this._builder.decreaseNestingLevel(); |
| 106 this._state.afterClosingBrace = true; |
| 107 this._state.inPropertyValue = false; |
| 108 } else if (token === ":" && !this._state.inPropertyValue && this._state.
seenProperty) { |
| 109 this._builder.addToken(token, startPosition, startLine, startColumn)
; |
| 110 this._builder.addSpace(); |
| 111 this._state.eatWhitespace = true; |
| 112 this._state.inPropertyValue = true; |
| 113 this._state.seenProperty = false; |
| 114 return; |
| 115 } else if (token === "{") { |
| 116 this._builder.addSpace(); |
| 117 this._builder.addToken(token, startPosition, startLine, startColumn)
; |
| 118 this._builder.addNewLine(); |
| 119 this._builder.increaseNestingLevel(); |
| 120 return; |
| 121 } |
| 122 |
| 123 this._builder.addToken(token, startPosition, startLine, startColumn); |
| 124 |
| 125 if (type === "css-comment" && !this._state.inPropertyValue && !this._sta
te.seenProperty) |
| 126 this._builder.addNewLine(); |
| 127 if (token === ";" && this._state.inPropertyValue) { |
| 128 this._state.inPropertyValue = false; |
| 129 this._builder.addNewLine(); |
| 130 } else if (token === "}") { |
| 131 this._builder.addNewLine(); |
| 132 } |
| 133 } |
| 134 } |
| 135 |
| 136 /** |
| 137 * @constructor |
| 138 * @param {string} content |
| 139 * @param {{original: Array.<number>, formatted: Array.<number>}} mapping |
| 140 * @param {number} originalOffset |
| 141 * @param {number} formattedOffset |
| 142 * @param {string} indentString |
| 143 */ |
| 144 FormatterWorker.CSSFormattedContentBuilder = function(content, mapping, original
Offset, formattedOffset, indentString) |
| 145 { |
| 146 this._originalContent = content; |
| 147 this._originalOffset = originalOffset; |
| 148 this._lastOriginalPosition = 0; |
| 149 |
| 150 this._formattedContent = []; |
| 151 this._formattedContentLength = 0; |
| 152 this._formattedOffset = formattedOffset; |
| 153 this._lastFormattedPosition = 0; |
| 154 |
| 155 this._mapping = mapping; |
| 156 |
| 157 this._lineNumber = 0; |
| 158 this._nestingLevel = 0; |
| 159 this._needNewLines = 0; |
| 160 this._atLineStart = true; |
| 161 this._indentString = indentString; |
| 162 this._cachedIndents = {}; |
| 163 } |
| 164 |
| 165 FormatterWorker.CSSFormattedContentBuilder.prototype = { |
| 166 /** |
| 167 * @param {string} token |
| 168 * @param {number} startPosition |
| 169 * @param {number} startLine |
| 170 * @param {number} startColumn |
| 171 */ |
| 172 addToken: function(token, startPosition, startLine, startColumn) |
| 173 { |
| 174 if ((this._isWhitespaceRun || this._atLineStart) && /^\s+$/.test(token)) |
| 175 return; |
| 176 |
| 177 if (this._isWhitespaceRun && this._lineNumber === startLine && !this._ne
edNewLines) |
| 178 this._addText(" "); |
| 179 |
| 180 this._isWhitespaceRun = false; |
| 181 this._atLineStart = false; |
| 182 |
| 183 while (this._lineNumber < startLine) { |
| 184 this._addText("\n"); |
| 185 this._addIndent(); |
| 186 this._needNewLines = 0; |
| 187 this._lineNumber += 1; |
| 188 this._atLineStart = true; |
| 189 } |
| 190 |
| 191 if (this._needNewLines) { |
| 192 this.flushNewLines(); |
| 193 this._addIndent(); |
| 194 this._atLineStart = true; |
| 195 } |
| 196 |
| 197 this._addMappingIfNeeded(startPosition); |
| 198 this._addText(token); |
| 199 this._lineNumber = startLine; |
| 200 }, |
| 201 |
| 202 addSpace: function() |
| 203 { |
| 204 if (this._isWhitespaceRun) |
| 205 return; |
| 206 this._isWhitespaceRun = true; |
| 207 }, |
| 208 |
| 209 addNewLine: function() |
| 210 { |
| 211 ++this._needNewLines; |
| 212 }, |
| 213 |
| 214 /** |
| 215 * @param {boolean=} atLeastOne |
| 216 */ |
| 217 flushNewLines: function(atLeastOne) |
| 218 { |
| 219 var newLineCount = atLeastOne && !this._needNewLines ? 1 : this._needNew
Lines; |
| 220 if (newLineCount) |
| 221 this._isWhitespaceRun = false; |
| 222 for (var i = 0; i < newLineCount; ++i) |
| 223 this._addText("\n"); |
| 224 this._needNewLines = 0; |
| 225 }, |
| 226 |
| 227 increaseNestingLevel: function() |
| 228 { |
| 229 this._nestingLevel += 1; |
| 230 }, |
| 231 |
| 232 /** |
| 233 * @param {boolean=} addNewline |
| 234 */ |
| 235 decreaseNestingLevel: function(addNewline) |
| 236 { |
| 237 if (this._nestingLevel) |
| 238 this._nestingLevel -= 1; |
| 239 if (addNewline) |
| 240 this.addNewLine(); |
| 241 }, |
| 242 |
| 243 /** |
| 244 * @return {string} |
| 245 */ |
| 246 content: function() |
| 247 { |
| 248 return this._formattedContent.join(""); |
| 249 }, |
| 250 |
| 251 _addIndent: function() |
| 252 { |
| 253 if (this._cachedIndents[this._nestingLevel]) { |
| 254 this._addText(this._cachedIndents[this._nestingLevel]); |
| 255 return; |
| 256 } |
| 257 |
| 258 var fullIndent = ""; |
| 259 for (var i = 0; i < this._nestingLevel; ++i) |
| 260 fullIndent += this._indentString; |
| 261 this._addText(fullIndent); |
| 262 |
| 263 // Cache a maximum of 20 nesting level indents. |
| 264 if (this._nestingLevel <= 20) |
| 265 this._cachedIndents[this._nestingLevel] = fullIndent; |
| 266 }, |
| 267 |
| 268 /** |
| 269 * @param {string} text |
| 270 */ |
| 271 _addText: function(text) |
| 272 { |
| 273 if (!text) |
| 274 return; |
| 275 this._formattedContent.push(text); |
| 276 this._formattedContentLength += text.length; |
| 277 }, |
| 278 |
| 279 /** |
| 280 * @param {number} originalPosition |
| 281 */ |
| 282 _addMappingIfNeeded: function(originalPosition) |
| 283 { |
| 284 if (originalPosition - this._lastOriginalPosition === this._formattedCon
tentLength - this._lastFormattedPosition) |
| 285 return; |
| 286 this._mapping.original.push(this._originalOffset + originalPosition); |
| 287 this._lastOriginalPosition = originalPosition; |
| 288 this._mapping.formatted.push(this._formattedOffset + this._formattedCont
entLength); |
| 289 this._lastFormattedPosition = this._formattedContentLength; |
| 290 } |
| 291 } |
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