author | wenzelm |
Mon, 29 Dec 2008 20:43:04 +0100 | |
changeset 34456 | 14367c0715e8 |
parent 34451 | 3b9d0074ed44 |
child 34481 | 660c639870a4 |
permissions | -rw-r--r-- |
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/* |
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* Document as list of commands |
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* |
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* @author Johannes Hölzl, TU Munich |
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*/ |
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||
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7 |
package isabelle.prover |
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import isabelle.proofdocument.{ProofDocument, Token, Text} |
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10 |
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11 |
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object Document { |
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class StructureChange(val beforeChange : Command, |
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val addedCommands : List[Command], |
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val removedCommands : List[Command]) |
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} |
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class Document(text : Text, val prover : Prover) extends ProofDocument[Command](text) |
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{ |
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val structural_changes = new EventBus[Document.StructureChange] |
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def isStartKeyword(s : String) = prover.command_decls.contains(s) |
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def commands() = new Iterator[Command] { |
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var current = firstToken |
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def hasNext() = current != null |
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def next() = { try {val s = current.command ; current = s.last.next ; s} |
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catch { case error : NullPointerException => |
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System.err.println("NPE!") |
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throw error |
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} |
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} |
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} |
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def getContent(cmd : Command) = text.content(cmd.proper_start, cmd.proper_stop) |
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def getNextCommandContaining(pos : Int) : Command = { |
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for( cmd <- commands()) { if (pos < cmd.stop) return cmd } |
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return null |
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} |
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override def tokenChanged(start : Token[Command], stop : Token[Command], |
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removed : Token[Command]) { |
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var removedCommands : List[Command] = Nil |
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var first : Command = null |
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var last : Command = null |
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for(t <- tokens(removed)) { |
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if (first == null) |
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first = t.command |
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if (t.command != last) |
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removedCommands = t.command :: removedCommands |
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last = t.command |
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} |
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var before : Command = null |
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if (! removedCommands.isEmpty) { |
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if (first.first == removed) { |
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if (start == null) |
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before = null |
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else |
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before = start.command |
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} |
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else |
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before = first.previous |
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} |
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var addedCommands : List[Command] = Nil |
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var scan : Token[Command] = null |
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if (start != null) { |
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val next = start.next |
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if (first != null && first.first != removed) { |
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scan = first.first |
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if (before == null) |
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before = first.previous |
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} |
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else if (next != null && next != stop) { |
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if (next.kind.equals(Token.Kind.COMMAND_START)) { |
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before = start.command |
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scan = next |
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} |
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else if (first == null || first.first == removed) { |
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first = start.command |
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removedCommands = first :: removedCommands |
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scan = first.first |
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if (before == null) |
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before = first.previous |
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} |
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else { |
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scan = first.first |
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if (before == null) |
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before = first.previous |
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} |
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} |
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} |
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else |
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scan = firstToken |
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var stopScan : Token[Command] = null |
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if (stop != null) { |
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if (stop == stop.command.first) |
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103 |
stopScan = stop |
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else |
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105 |
stopScan = stop.command.last.next |
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} |
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else if (last != null) |
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108 |
stopScan = last.last.next |
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109 |
else |
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110 |
stopScan = null |
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var cmdStart : Token[Command] = null |
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var cmdStop : Token[Command] = null |
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114 |
var overrun = false |
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115 |
var finished = false |
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116 |
while (scan != null && !finished) { |
34456 | 117 |
if (scan == stopScan) { |
34388 | 118 |
if (scan.kind.equals(Token.Kind.COMMAND_START)) |
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119 |
finished = true |
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|
120 |
else |
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121 |
overrun = true |
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122 |
} |
34456 | 123 |
|
34388 | 124 |
if (scan.kind.equals(Token.Kind.COMMAND_START) && cmdStart != null && !finished) { |
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125 |
if (! overrun) { |
34397 | 126 |
addedCommands = new Command(this, cmdStart, cmdStop) :: addedCommands |
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127 |
cmdStart = scan |
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128 |
cmdStop = scan |
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129 |
} |
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|
130 |
else |
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|
131 |
finished = true |
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132 |
} |
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|
133 |
else if (! finished) { |
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|
134 |
if (cmdStart == null) |
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|
135 |
cmdStart = scan |
c13e168a8ae6
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|
136 |
cmdStop = scan |
c13e168a8ae6
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|
137 |
} |
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|
138 |
if (overrun && !finished) { |
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|
139 |
if (scan.command != last) |
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|
140 |
removedCommands = scan.command :: removedCommands |
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|
141 |
last = scan.command |
c13e168a8ae6
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142 |
} |
34456 | 143 |
|
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|
144 |
if (!finished) |
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|
145 |
scan = scan.next |
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|
146 |
} |
34456 | 147 |
|
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148 |
if (cmdStart != null) |
34397 | 149 |
addedCommands = new Command(this, cmdStart, cmdStop) :: addedCommands |
34456 | 150 |
|
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151 |
// relink commands |
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152 |
addedCommands = addedCommands.reverse |
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153 |
removedCommands = removedCommands.reverse |
34456 | 154 |
|
155 |
structural_changes.event( |
|
156 |
new Document.StructureChange(before, addedCommands, removedCommands)) |
|
34318
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|
157 |
} |
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|
158 |
} |