| | 1 | = Coding Style Guidelines = |
| | 2 | |
| | 3 | Those guidelines where defined based on mixed common standards mainly related to Java and C# programming. |
| | 4 | |
| | 5 | It is quite common to take the Java style to write !JavaScript code, assuming it is a "cut-down" version of Java. Although !JavaScript has an indirect relation with Java, apart from the similar "C style" syntax, it has nothing to do with it. It is not a class based language. It is an interpreted, object based, loosely typed scripting language. It can run only in the presence of a "host" application, like a web browser. |
| | 6 | |
| | 7 | If we instead take a closer look at C# code standards (from Microsoft), we'll not more modern and readable proposals, which help also on identifying custom code from the underlying host environment. |
| | 8 | |
| | 9 | The following definitions are based on long years of experience with pure !JavaScript coding. |
| | 10 | |
| | 11 | == General Recommendations == |
| | 12 | |
| | 13 | Any violation to the guide is allowed if it enhances readability. |
| | 14 | |
| | 15 | The name "FCKeditor" is used, it must always be written with "FCK" uppercased concatened with "editor" in lowercase. The following are wrong: "!FckEditor", "FCKEditor", "fckEditor", "FCK Editor", and so on. Exception is made for directory names, where all chars "should" be in lowercase. |
| | 16 | |
| | 17 | The name "!JavaScript" should be written with both the "J" and "S" in uppercase. The following are wrong: "Javascript", "javascript", etc. |
| | 18 | |
| | 19 | == Naming Conventions == |
| | 20 | |
| | 21 | === Generic Name Conventions === |
| | 22 | |
| | 23 | Names representing packages must be in CamelCase. Whenever applicable, the package name will be prefixed with "FCKeditor.". |
| | 24 | |
| | 25 | {{{ |
| | 26 | FCKeditor, FCKeditor.Net, FCKeditor.Java |
| | 27 | }}} |
| | 28 | |
| | 29 | Names representing public classes and public global objects must be in CamelCase and prefixed with "FCK". |
| | 30 | |
| | 31 | {{{ |
| | 32 | FCKBrowserInfo, FCKToolbarButton |
| | 33 | }}} |
| | 34 | |
| | 35 | Names representing constants must be all uppercase. |
| | 36 | |
| | 37 | {{{ |
| | 38 | FCK_STATUS_COMPLETE, FCK_EDITMODE_WYSIWYG, CTRL |
| | 39 | }}} |
| | 40 | |
| | 41 | Names representing public methods must be verbs and written in CamelCase. |
| | 42 | |
| | 43 | {{{ |
| | 44 | AppendStyleSheet(), GetElementDocument(), SetTimeout() |
| | 45 | }}} |
| | 46 | |
| | 47 | Names representing public properties must be verbs and written in CamelCase. |
| | 48 | |
| | 49 | {{{ |
| | 50 | Name, Document, TargetWindow |
| | 51 | }}} |
| | 52 | |
| | 53 | Names representing private methods must be verbs and written in CamelCase prefixed with an underscore. |
| | 54 | |
| | 55 | {{{ |
| | 56 | _DoInternalStuff() |
| | 57 | }}} |
| | 58 | |
| | 59 | Names representing private properties must be verbs and written in CamelCase prefixed with an underscore. |
| | 60 | |
| | 61 | {{{ |
| | 62 | _InternalCounter, _Prefix |
| | 63 | }}} |
| | 64 | |
| | 65 | Names representing private global function must be in CamelCase prefixed with an underscore. |
| | 66 | |
| | 67 | ((( |
| | 68 | function _DoSomething() |
| | 69 | ))) |
| | 70 | |
| | 71 | Abbreviations and acronyms should not be uppercase when used as name. |
| | 72 | |
| | 73 | {{{ |
| | 74 | SetHtml(), XmlDocument |
| | 75 | NOT |
| | 76 | SetHTML(), XMLDocument |
| | 77 | }}} |
| | 78 | |
| | 79 | All names should be written in English. |
| | 80 | |
| | 81 | === Specific Name Conventions === |
| | 82 | |
| | 83 | The prefixes "Get" and "Set" may be used on methods that get or set properties which require computation. |
| | 84 | |
| | 85 | {{{ |
| | 86 | SetArrayCount(), GetFormattedValue() |
| | 87 | }}} |
| | 88 | |
| | 89 | The prefix "!CheckIs" may be used on methods which return boolean states which require computation. |
| | 90 | |
| | 91 | {{{ |
| | 92 | CheckIsValid(), CheckIsEmpty() |
| | 93 | }}} |
| | 94 | |
| | 95 | Abbreviations in names should be avoided. |
| | 96 | |
| | 97 | {{{ |
| | 98 | GetDirectoryName(), applicationCommand |
| | 99 | NOT |
| | 100 | GetDirName(), appCmd |
| | 101 | }}} |
| | 102 | |
| | 103 | == Files == |
| | 104 | |
| | 105 | All files must be named in all lower case. |
| | 106 | |
| | 107 | Classes and global objects should be declared in individual files with the file name matching the class/object name. |
| | 108 | |
| | 109 | {{{ |
| | 110 | fckbrowserinfo.js, fcktoolbarbutton.js |
| | 111 | }}} |
| | 112 | |
| | 113 | == Layout == |
| | 114 | |
| | 115 | For indentation, the TAB should be used. Development IDEs should be configured to represent TABs as 4 spaces. |
| | 116 | |
| | 117 | {{{ |
| | 118 | if ( test ) |
| | 119 | { |
| | 120 | if ( otherTest ) |
| | 121 | DoSomething() ; |
| | 122 | DoMore() ; |
| | 123 | } |
| | 124 | }}} |
| | 125 | |
| | 126 | Block layout should be as illustrated. |
| | 127 | |
| | 128 | {{{ |
| | 129 | while ( !done ) |
| | 130 | { |
| | 131 | doSomething() ; |
| | 132 | done = moreToDo() ; |
| | 133 | } |
| | 134 | }}} |
| | 135 | |
| | 136 | Single statement if/else/while/for should be written without brackets, but never in the same line. |
| | 137 | |
| | 138 | {{{ |
| | 139 | if ( condition ) |
| | 140 | statement ; |
| | 141 | |
| | 142 | while ( condition ) |
| | 143 | statement ; |
| | 144 | |
| | 145 | for ( initialization ; condition ; update ) |
| | 146 | statement ; |
| | 147 | }}} |
| | 148 | |
| | 149 | The incompleteness of split lines must be made obvious. |
| | 150 | |
| | 151 | {{{ |
| | 152 | totalSum = a + b + c + |
| | 153 | d + e ; |
| | 154 | |
| | 155 | method( param1, param2, |
| | 156 | param3 ) ; |
| | 157 | |
| | 158 | setText( 'Long line split' + |
| | 159 | 'into two parts.' ) ; |
| | 160 | |
| | 161 | }}} |
| | 162 | |
| | 163 | === Whitespace === |
| | 164 | |
| | 165 | Conventional operators should be surrounded by a space (including ternary operators). |
| | 166 | |
| | 167 | {{{ |
| | 168 | if ( i > 3 && test == 'yes' ) |
| | 169 | }}} |
| | 170 | |
| | 171 | Commas should be followed by a space. |
| | 172 | |
| | 173 | {{{ |
| | 174 | function MyFunction( parm1, param2, param3 ) |
| | 175 | }}} |
| | 176 | |
| | 177 | Semi-colons in for statements should be surrounded by a space. |
| | 178 | {{{ |
| | 179 | for ( var i = 0 ; i < count ; i++ ) |
| | 180 | }}} |
| | 181 | |
| | 182 | Semi-colons should be preceded by a space. |
| | 183 | {{{ |
| | 184 | DoSomething() ; |
| | 185 | var name = 'John' ; |
| | 186 | }}} |
| | 187 | |
| | 188 | Colons should be surrounded by a space. |
| | 189 | {{{ |
| | 190 | case 100 : |
| | 191 | NOT |
| | 192 | case 100: |
| | 193 | }}} |
| | 194 | |
| | 195 | Opening parenthesis must be followed by a space and closing parenthesis must be preceded by a space. |
| | 196 | |
| | 197 | {{{ |
| | 198 | if ( myVar == 1 ) |
| | 199 | }}} |
| | 200 | |
| | 201 | Functions/method calls should not be followed by a space. |
| | 202 | |
| | 203 | {{{ |
| | 204 | DoSomething( someParameter ) ; |
| | 205 | NOT |
| | 206 | doSomething ( someParameter ) ; |
| | 207 | }}} |
| | 208 | |
| | 209 | Logical units within a block should be separated by one blank line. |
| | 210 | |
| | 211 | {{{ |
| | 212 | // Create a new identity matrix |
| | 213 | var matrix = new Matrix4x4() ; |
| | 214 | |
| | 215 | // Precompute angles for efficiency |
| | 216 | var cosAngle = MathCos(angle) ; |
| | 217 | var sinAngle = MathSin(angle) ; |
| | 218 | |
| | 219 | // Specify matrix as a rotation transformation |
| | 220 | matrix.SetElement( 1, 1, cosAngle ) ; |
| | 221 | matrix.setElement( 1, 2, sinAngle ) ; |
| | 222 | matrix.setElement( 2, 1, -sinAngle ) ; |
| | 223 | matrix.setElement( 2, 2, cosAngle ) ; |
| | 224 | |
| | 225 | // Apply rotation |
| | 226 | transformation.multiply( matrix ) ; |
| | 227 | }}} |
| | 228 | |
| | 229 | == Variables == |
| | 230 | |
| | 231 | Variables must be always defined with "var". |
| | 232 | |
| | 233 | Function parameters must be in pascalCase. |
| | 234 | |
| | 235 | {{{ |
| | 236 | function Sum( firstNumber, secondNumber ) |
| | 237 | }}} |
| | 238 | |
| | 239 | Local variables must be in pascalCase. |
| | 240 | |
| | 241 | {{{ |
| | 242 | function DoSomething() |
| | 243 | { |
| | 244 | var colorOne = 1 ; |
| | 245 | var colorTwo = 2 ; |
| | 246 | |
| | 247 | return colorOne + colorTwo ; |
| | 248 | } |
| | 249 | }}} |
| | 250 | |
| | 251 | == Comments == |
| | 252 | |
| | 253 | Tricky code should not be commented but rewritten: In general, the use of comments should be minimized by making the code self-documenting by appropriate name choices and an explicit logical structure. |
| | 254 | |
| | 255 | All comments should be written in English. |
| | 256 | |
| | 257 | There should be a space after the comment identifier. |
| | 258 | |
| | 259 | {{{ |
| | 260 | // This is a comment NOT: //This is a comment |
| | 261 | /** NOT: /** |
| | 262 | * This is block *This is a block |
| | 263 | * comment *comment |
| | 264 | */ */ |
| | 265 | }}} |
| | 266 | |
| | 267 | ---- |