New support for filter commands

src/com/maddyhome/idea/vim/ex/handler/CmdFilterHandler.java

@@ -0,0 +1,78 @@
+package com.maddyhome.idea.vim.ex.handler;
+
+/*
+* IdeaVim - A Vim emulator plugin for IntelliJ Idea
+* Copyright (C) 2003 Rick Maddy
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.util.TextRange;
+import com.maddyhome.idea.vim.ex.CommandHandler;
+import com.maddyhome.idea.vim.ex.ExCommand;
+import com.maddyhome.idea.vim.ex.ExException;
+import com.maddyhome.idea.vim.ex.Ranges;
+import com.maddyhome.idea.vim.group.CommandGroups;
+
+/**
+ *
+ */
+public class CmdFilterHandler extends CommandHandler
+{
+    public CmdFilterHandler()
+    {
+        super("!", "", RANGE_OPTIONAL | ARGUMENT_OPTIONAL | WRITABLE);
+    }
+
+    public boolean execute(Editor editor, DataContext context, ExCommand cmd) throws ExException
+    {
+        logger.info("execute");
+
+        Ranges ranges = cmd.getRanges();
+        if (ranges.size() == 0)
+        {
+            // Command
+            String command = cmd.getArgument();
+            if (command.equals("!"))
+            {
+                // repeat last command
+            }
+
+            return false;
+        }
+        else
+        {
+            // Filter
+            TextRange range = cmd.getTextRange(editor, context, false);
+            String command = cmd.getArgument();
+            if (command.equals("!"))
+            {
+                command = CommandGroups.getInstance().getProcess().getLastCommand();
+            }
+
+            if (command == null || command.length() == 0)
+            {
+                return false;
+            }
+
+            return CommandGroups.getInstance().getProcess().executeFilter(editor, context, range, command);
+        }
+    }
+
+    private static Logger logger = Logger.getInstance(CmdFilterHandler.class.getName());
+}

src/com/maddyhome/idea/vim/group/ProcessGroup.java

@@ -0,0 +1,101 @@
+package com.maddyhome.idea.vim.group;
+
+/*
+* IdeaVim - A Vim emulator plugin for IntelliJ Idea
+* Copyright (C) 2003 Rick Maddy
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.openapi.diagnostic.Logger;
+import java.io.CharArrayReader;
+import java.io.StringWriter;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.BufferedWriter;
+import java.io.OutputStreamWriter;
+
+/**
+ *
+ */
+public class ProcessGroup extends AbstractActionGroup
+{
+    public ProcessGroup()
+    {
+    }
+
+    public String getLastCommand()
+    {
+        return lastCommand;
+    }
+
+    public boolean executeFilter(Editor editor, DataContext context, TextRange range, String command)
+    {
+        logger.debug("command=" + command);
+        char[] chars = editor.getDocument().getChars();
+        CharArrayReader car = new CharArrayReader(chars, range.getStartOffset(),
+            range.getEndOffset() - range.getStartOffset());
+        StringWriter sw = new StringWriter();
+
+        try
+        {
+            logger.debug("about to create filter");
+            Process filter = Runtime.getRuntime().exec(command);
+            logger.debug("filter created");
+            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(filter.getOutputStream()));
+            logger.debug("sending text");
+            copy(car, writer);
+            writer.close();
+            logger.debug("sent");
+
+            BufferedReader reader = new BufferedReader(new InputStreamReader(filter.getInputStream()));
+            logger.debug("getting result");
+            copy(reader, sw);
+            sw.close();
+            logger.debug("received");
+
+            editor.getDocument().replaceString(range.getStartOffset(), range.getEndOffset(), sw.toString());
+
+            lastCommand = command;
+            
+            return true;
+        }
+        catch (IOException e)
+        {
+            // TODO
+            return false;
+        }
+    }
+
+    private void copy(Reader from, Writer to) throws IOException
+    {
+        char[] buf = new char[2048];
+        int cnt;
+        while ((cnt = from.read(buf)) != -1)
+        {
+            to.write(buf, 0, cnt);
+        }
+    }
+
+    private String lastCommand;
+
+    private static Logger logger = Logger.getInstance(ProcessGroup.class.getName());
+}