| 1 | # TODO: rename to Writers.cobra |
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| 2 | |
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| 3 | class AutoFlushWriter |
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| 4 | inherits TextWriter |
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| 5 | implements IDisposable |
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| 6 | """ |
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| 7 | Autoflushes on .write(someString) or .write(char) where char == '\n' (or whatever character you set). |
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| 8 | """ |
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| 9 | |
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| 10 | var _innerWriter as TextWriter |
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| 11 | var _willAutoFlush = c'\n' |
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| 12 | |
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| 13 | cue init(tw as TextWriter) |
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| 14 | base.init |
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| 15 | _innerWriter = tw |
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| 16 | |
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| 17 | pro willAutoFlush from var |
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| 18 | |
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| 19 | ## Being a TextWriter |
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| 20 | |
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| 21 | def write(value as char) is override |
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| 22 | _innerWriter.write(value) |
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| 23 | if value == c'\n' |
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| 24 | _innerWriter.flush |
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| 25 | |
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| 26 | def write(value as String?) is override |
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| 27 | _innerWriter.write(value) |
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| 28 | _innerWriter.flush |
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| 29 | |
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| 30 | get encoding as Encoding? is override |
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| 31 | return _innerWriter.encoding |
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| 32 | |
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| 33 | def toString as String is override |
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| 34 | return '[.getType.name](willAutoFlush=[.willAutoFlush], [_innerWriter])' |
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| 35 | |
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| 36 | def flush is override |
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| 37 | _innerWriter.flush |
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| 38 | |
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| 39 | ## Other |
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| 40 | |
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| 41 | def dispose is new |
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| 42 | #sharp'base.Dispose();' |
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| 43 | #sharp'_innerWriter.Dispose();' |
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| 44 | _innerWriter.dispose |
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| 45 | |
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| 46 | class IndentedWriter |
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| 47 | inherits TextWriter |
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| 48 | implements IDisposable |
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| 49 | """ |
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| 50 | Provides for indented writing which can be useful for: |
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| 51 | |
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| 52 | * debugging output such as a manually implemented trace of your code |
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| 53 | |
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| 54 | * HTML source code to indent the contents of containing tags such as <body> |
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| 55 | and <td> |
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| 56 | """ |
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| 57 | |
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| 58 | test |
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| 59 | iw = IndentedWriter(StringWriter()) |
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| 60 | assert iw.toString=='', iw.toString |
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| 61 | nl = iw.newLine |
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| 62 | tab = '\t' |
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| 63 | iw.writeLine('one') |
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| 64 | assert iw.toString=='one[nl]', iw.toString |
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| 65 | iw.indent |
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| 66 | iw.writeLine('two') |
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| 67 | assert iw.toString=='one[nl][tab]two[nl]' |
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| 68 | iw.dedent |
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| 69 | iw.writeLine('three') |
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| 70 | assert iw.toString=='one[nl][tab]two[nl]three[nl]' |
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| 71 | |
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| 72 | var _innerWriter as TextWriter |
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| 73 | var _lastChar = '' # use a string because _innerWriter.NewLine is a string |
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| 74 | var _indentString = '\t' |
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| 75 | var _indentLevel = 0 |
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| 76 | var _totalIndentString = '' |
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| 77 | var _isWritingIndent = false |
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| 78 | |
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| 79 | cue init(tw as TextWriter) |
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| 80 | base.init |
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| 81 | _innerWriter = tw |
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| 82 | |
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| 83 | def indent |
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| 84 | _indentLevel += 1 |
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| 85 | _setTotalIndentString() |
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| 86 | |
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| 87 | def dedent |
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| 88 | _indentLevel -= 1 |
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| 89 | _setTotalIndentString() |
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| 90 | |
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| 91 | pro indentString from var |
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| 92 | """ |
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| 93 | Returns the string used for one level of indentation. |
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| 94 | Default value is "\t". |
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| 95 | """ |
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| 96 | |
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| 97 | get newLine2 as String |
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| 98 | return '\n' # because NewLine is "\r\n" but we don't require the \r |
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| 99 | |
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| 100 | def indentAndWrite(s as String) |
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| 101 | .indent |
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| 102 | .write(s) |
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| 103 | |
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| 104 | def writeAndIndent(s as String) |
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| 105 | .write(s) |
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| 106 | .indent |
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| 107 | |
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| 108 | def dedentAndWrite(s as String) |
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| 109 | .dedent |
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| 110 | .write(s) |
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| 111 | |
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| 112 | # *** Being a TextWriter *** |
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| 113 | |
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| 114 | def write(value as char) is override |
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| 115 | if _isWritingIndent |
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| 116 | _innerWriter.write(value) |
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| 117 | return |
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| 118 | if _lastChar==_innerWriter.newLine or _lastChar==.newLine2 |
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| 119 | _isWritingIndent = true |
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| 120 | try |
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| 121 | .write(_totalIndentString) |
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| 122 | finally |
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| 123 | _isWritingIndent = false |
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| 124 | _innerWriter.write(value) |
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| 125 | _lastChar = value.toString |
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| 126 | |
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| 127 | def write(value as String?) |
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| 128 | if _isWritingIndent |
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| 129 | _innerWriter.write(value) |
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| 130 | else |
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| 131 | base.write(value) |
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| 132 | |
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| 133 | get encoding as Encoding? is override |
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| 134 | return _innerWriter.encoding |
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| 135 | |
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| 136 | def toString as String is override |
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| 137 | return _innerWriter.toString |
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| 138 | |
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| 139 | def flush is override |
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| 140 | _innerWriter.flush |
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| 141 | |
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| 142 | ## Other |
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| 143 | |
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| 144 | def dispose is new |
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| 145 | #sharp'base.Dispose();' |
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| 146 | #sharp'_innerWriter.Dispose();' |
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| 147 | _innerWriter.dispose |
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| 148 | |
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| 149 | # *** Private Util *** |
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| 150 | |
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| 151 | def _setTotalIndentString |
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| 152 | is protected |
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| 153 | sb = StringBuilder() |
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| 154 | for i in _indentLevel |
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| 155 | sb.append(_indentString) |
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| 156 | _totalIndentString = sb.toString |
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