From 7ec2daa9f1df4cd4a55ba820fb3b143976e5527d Mon Sep 17 00:00:00 2001
From: stephena <stephena@8b62c5a3-ac7e-4cc8-8f21-d9a121418aba>
Date: Sun, 9 Oct 2005 20:41:56 +0000
Subject: [PATCH] Added some bash shortcuts to EditableWidget.  These are the
 same as in PromptWidget, so there's some code redundancy ATM.  In the future,
 PromptWidget should inherit from EditableWidget and automatically gain all
 line editing capabilities.

git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@816 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
---
 stella/src/gui/EditableWidget.cxx | 146 +++++++++++++++++++++++++++---
 stella/src/gui/EditableWidget.hxx |   9 +-
 2 files changed, 141 insertions(+), 14 deletions(-)

diff --git a/stella/src/gui/EditableWidget.cxx b/stella/src/gui/EditableWidget.cxx
index 1443e5a36..c771f05db 100644
--- a/stella/src/gui/EditableWidget.cxx
+++ b/stella/src/gui/EditableWidget.cxx
@@ -13,7 +13,7 @@
 // See the file "license" for information on usage and redistribution of
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //
-// $Id: EditableWidget.cxx,v 1.13 2005-09-30 00:40:34 stephena Exp $
+// $Id: EditableWidget.cxx,v 1.14 2005-10-09 20:41:56 stephena Exp $
 //
 //   Based on code from ScummVM - Scumm Interpreter
 //   Copyright (C) 2002-2004 The ScummVM project
@@ -75,9 +75,8 @@ bool EditableWidget::handleKeyDown(int ascii, int keycode, int modifiers)
   if(!_editable)
     return true;
 
-  // Ignore all mod keys
-  if(instance()->eventHandler().kbdControl(modifiers) ||
-     instance()->eventHandler().kbdAlt(modifiers))
+  // Ignore all alt-mod keys
+  if(instance()->eventHandler().kbdAlt(modifiers))
     return true;
 
   bool handled = true;
@@ -100,17 +99,11 @@ bool EditableWidget::handleKeyDown(int ascii, int keycode, int modifiers)
       break;
 
     case 8:     // backspace
-      if (_caretPos > 0)
-      {
-        _caretPos--;
-        _editString.erase(_caretPos, 1);
-        dirty = true;
-      }
+      dirty = killChar(-1);
       break;
 
     case 127:   // delete
-      _editString.erase(_caretPos, 1);
-      dirty = true;
+      dirty = killChar(+1);
       break;
 
     case 256 + 20:  // left arrow
@@ -132,7 +125,11 @@ bool EditableWidget::handleKeyDown(int ascii, int keycode, int modifiers)
       break;
 
     default:
-      if (tryInsertChar((char)ascii, _caretPos))
+      if (instance()->eventHandler().kbdControl(modifiers))
+      {
+        dirty = specialKeys(keycode);
+      }
+      else if (tryInsertChar((char)ascii, _caretPos))
       {
         _caretPos++;
         sendCommand(kEditChangedCmd, ascii, _id);
@@ -229,3 +226,126 @@ bool EditableWidget::adjustOffset()
 
   return true;
 }
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool EditableWidget::specialKeys(int keycode)
+{
+  bool handled = true;
+
+  switch (keycode)
+  {
+    case 'a':
+      setCaretPos(0);
+      break;
+
+    case 'e':
+      setCaretPos(_editString.size());
+      break;
+
+    case 'd':
+      handled = killChar(+1);
+      break;
+
+    case 'k':
+      handled = killLine(+1);
+      break;
+
+    case 'u':
+      handled = killLine(-1);
+      break;
+
+    case 'w':
+      handled = killLastWord();
+      break;
+
+    default:
+      handled = false;
+  }
+
+  return handled;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool EditableWidget::killChar(int direction)
+{
+  bool handled = false;
+
+  if(direction == -1)      // Delete previous character (backspace)
+  {
+    if(_caretPos > 0)
+    {
+      _caretPos--;
+      _editString.erase(_caretPos, 1);
+      handled = true;
+    }
+  }
+  else if(direction == 1)  // Delete next character (delete)
+  {
+    _editString.erase(_caretPos, 1);
+    handled = true;
+  }
+
+  return handled;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool EditableWidget::killLine(int direction)
+{
+  bool handled = false;
+
+  if(direction == -1)  // erase from current position to beginning of line
+  {
+    int count = _caretPos;
+    if(count > 0)
+    {
+      for (int i = 0; i < count; i++)
+        killChar(-1);
+
+      handled = true;
+    }
+  }
+  else if(direction == 1)  // erase from current position to end of line
+  {
+    int count = _editString.size() - _caretPos;
+    if(count > 0)
+    {
+      for (int i = 0; i < count; i++)
+        killChar(+1);
+
+      handled = true;
+    }
+  }
+
+  return handled;
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool EditableWidget::killLastWord()
+{
+  bool handled = false;
+  int count = 0, currentPos = _caretPos;
+  bool space = true;
+  while (currentPos > 0)
+  {
+    if (_editString[currentPos - 1] == ' ')
+    {
+      if (!space)
+        break;
+    }
+    else
+      space = false;
+
+    currentPos--;
+    count++;
+  }
+
+  if(count > 0)
+  {
+    for (int i = 0; i < count; i++)
+      killChar(-1);
+
+    handled = true;
+  }
+
+  return handled;
+}
diff --git a/stella/src/gui/EditableWidget.hxx b/stella/src/gui/EditableWidget.hxx
index 7e538edd8..e9770df76 100644
--- a/stella/src/gui/EditableWidget.hxx
+++ b/stella/src/gui/EditableWidget.hxx
@@ -13,7 +13,7 @@
 // See the file "license" for information on usage and redistribution of
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //
-// $Id: EditableWidget.hxx,v 1.7 2005-09-30 00:40:34 stephena Exp $
+// $Id: EditableWidget.hxx,v 1.8 2005-10-09 20:41:56 stephena Exp $
 //
 //   Based on code from ScummVM - Scumm Interpreter
 //   Copyright (C) 2002-2004 The ScummVM project
@@ -65,6 +65,13 @@ class EditableWidget : public Widget, public CommandSender
 	
     virtual bool tryInsertChar(char c, int pos);
 
+  private:
+    // Line editing
+    bool specialKeys(int keycode);
+    bool killChar(int direction);
+    bool killLine(int direction);
+    bool killLastWord();
+
   protected:
     bool   _editable;
     string _editString;