initial import of python-console

1 files changed, 174 insertions, 0 deletions

diff --git a/3rdparty/python-console/ParseHelper.BlockParseState.cpp b/3rdparty/python-console/ParseHelper.BlockParseState.cpp
new file mode 100644
index 00000000..4dc568b2
--- /dev/null
+++ b/3rdparty/python-console/ParseHelper.BlockParseState.cpp
@@ -0,0 +1,174 @@
+/**
+Copyright (c) 2014 Alex Tsui
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+#include "ParseHelper.h"
+
+ParseHelper::BlockParseState::
+BlockParseState( ParseHelper& parent ):
+    ParseState( parent )
+{ }
+
+ParseHelper::BlockParseState::
+BlockParseState( ParseHelper& parent, const std::string& indent_ ):
+    ParseState( parent ),
+    indent( indent_ )
+{ }
+
+bool ParseHelper::BlockParseState::
+process(const std::string& str)
+{
+    bool ok = initializeIndent(str);
+    if ( ! ok )
+    {
+        // finish processing
+        return true;
+    }
+
+    Indent ind;
+    bool isIndented = PeekIndent( str, &ind );
+    if ( isIndented )
+    {
+#ifndef NDEBUG
+        std::cout << "current line indent: ";
+        print( ind );
+#endif
+        // check if indent matches
+        if ( ind.Token != indent.Token )
+        {
+            // dedent until we match or empty the stack
+            bool found = false;
+            while ( !found )
+            {
+                parent.stateStack.pop_back( );
+                if ( !parent.stateStack.size( ) )
+                    break;
+                boost::shared_ptr<BlockParseState> parseState =
+                    boost::dynamic_pointer_cast<BlockParseState>(
+                        parent.stateStack.back( ));
+                found = ( ind.Token == parseState->indent.Token );
+            }
+
+            if ( ! found )
+            {
+#ifndef NDEBUG
+                std::cout << "indent mismatch\n";
+#endif
+                parent.reset( );
+                ParseMessage msg( 1, "IndentationError: unexpected indent");
+                parent.broadcast( msg );
+                return true;
+            }
+        }
+
+        // process command
+
+        // enter indented block state
+        if ( str[str.size()-1] == ':' )
+        {
+            parent.commandBuffer.push_back( str );
+            //parent.inBlock = (boost::dynamic_pointer_cast<BlockParseState>(
+            //    parent.stateStack.back()));
+
+            //expectingIndent = true;
+            boost::shared_ptr<ParseState> parseState(
+                new BlockParseState( parent ) );
+            parent.stateStack.push_back( parseState );
+            return true;
+        }
+
+        if ( str[str.size()-1] == '\\' )
+        {
+            parent.commandBuffer.push_back( str );
+            boost::shared_ptr<ParseState> parseState(
+                new ContinuationParseState( parent ) );
+            parent.stateStack.push_back( parseState );
+            return true;
+        }
+
+        if (BracketParseState::HasOpenBrackets( str ))
+        {
+            // FIXME: Every parse state should have its own local buffer
+            boost::shared_ptr<ParseState> parseState(
+                new BracketParseState( parent, str ) );
+            parent.stateStack.push_back( parseState );
+            return true;
+        }
+
+        parent.commandBuffer.push_back( str );
+        return true;
+    }
+    else
+    {
+        if ( str.size() )
+        {
+            {
+#ifndef NDEBUG
+                std::cout << "Expected indented block\n";
+#endif
+                parent.reset( );
+                ParseMessage msg( 1, "IndentationError: expected an indented block" );
+                parent.broadcast( msg );
+                return false;
+            }
+        }
+#ifndef NDEBUG
+        std::cout << "Leaving block\n";
+#endif
+        parent.stateStack.pop_back();
+        parent.flush( );
+        parent.reset( );
+        return true;
+    }
+}
+
+bool ParseHelper::BlockParseState::
+initializeIndent(const std::string& str)
+{
+    bool expectingIndent = (indent.Token == "");
+    if ( !expectingIndent )
+    {
+        std::cout << "already initialized indent: ";
+        print( indent );
+        return true;
+    }
+
+    Indent ind;
+    bool isIndented = parent.PeekIndent( str, &ind );
+    if ( !isIndented )
+    {
+#ifndef NDEBUG
+        std::cout << "Expected indented block\n";
+#endif
+        parent.reset( );
+        ParseMessage msg( 1, "IndentationError: expected an indented block" );
+        parent.broadcast( msg );
+        return false;
+    }
+    indent = ind;
+    //parent.currentIndent = ind;
+    //parent.indentStack.push_back( parent.currentIndent );
+    //parent.expectingIndent = false;
+#ifndef NDEBUG
+    std::cout << "initializing indent: ";
+    print( ind );
+#endif
+    return true;
+}