First pass at label completion in prompt. Since Tab is used for switching

between widgets, I used Escape as the completion key. It's almost working
correctly, but the implementation should be cleaned up.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@552 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

stella/src/debugger/EquateList.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: EquateList.cxx,v 1.14 2005-06-23 01:10:25 urchlay Exp $
+// $Id: EquateList.cxx,v 1.15 2005-06-24 00:03:39 urchlay Exp $
 //============================================================================
 
 #include <string>
@@ -307,3 +307,25 @@ string EquateList::dumpAll() {
 	}
 	return ret;
 }
+
+int EquateList::countCompletions(const char *in) {
+	int count = 0;
+	completions = "";
+
+	cerr << "Attempting to complete \"" << in << "\"" << endl;
+	for(int i=0; i<currentSize; i++) {
+		if(ourVcsEquates[i].address != -1) {
+			const char *l = ourVcsEquates[i].label;
+			if(STR_N_CASE_CMP(l, in, strlen(in)) == 0) {
+				if(count++) completions += "  ";
+				completions += l;
+			}
+		}
+	}
+	cerr << "Found " << count << " label(s):" << endl << completions << endl;
+	return count;
+}
+
+const char *EquateList::getCompletions() {
+	return completions.c_str();
+}

stella/src/debugger/EquateList.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: EquateList.hxx,v 1.8 2005-06-23 01:10:25 urchlay Exp $
+// $Id: EquateList.hxx,v 1.9 2005-06-24 00:03:39 urchlay Exp $
 //============================================================================
 
 #ifndef EQUATELIST_HXX
@@ -38,12 +38,15 @@ class EquateList {
 		bool undefine(string& label);
 		bool undefine(const char *lbl);
 		string dumpAll();
+		int countCompletions(const char *in);
+		const char *getCompletions();
 
 	private:
 		int calcSize();
 		int parse4hex(char *c);
 		string extractLabel(char *c);
 		int extractValue(char *c);
+      string completions;
 
 	private:
 		Equates ourVcsEquates;

stella/src/gui/PromptWidget.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: PromptWidget.cxx,v 1.13 2005-06-23 14:33:11 stephena Exp $
+// $Id: PromptWidget.cxx,v 1.14 2005-06-24 00:03:38 urchlay Exp $
 //
 //   Based on code from ScummVM - Scumm Interpreter
 //   Copyright (C) 2002-2004 The ScummVM project
@@ -30,6 +30,7 @@
 #include "DebuggerDialog.hxx"
 
 #include "PromptWidget.hxx"
+#include "EquateList.hxx"
 
 #define PROMPT  "> "
 
@@ -191,6 +192,64 @@ bool PromptWidget::handleKeyDown(int ascii, int keycode, int modifiers)
       break;
     }
 
+    case 27:  // escape
+      {
+        if(_currentPos <= _promptStartPos)
+          break;
+
+        scrollToCurrent();
+        int len = _promptEndPos - _promptStartPos;
+        if(len <= 3)
+          break;
+
+        int lastSpace = -1;
+        char *str = new char[len + 1];
+        for (i = 0; i < len; i++) {
+          str[i] = buffer(_promptStartPos + i);
+          if(str[i] == ' ')
+            lastSpace = i;
+        }
+        str[len] = '\0';
+
+        if(lastSpace < 2) {
+          delete[] str;
+          break;
+        }
+
+        int oldPos = _currentPos;
+        nextLine();
+
+        int possibilities = instance()->debugger().equates()->countCompletions(str + lastSpace + 1);
+        if(possibilities < 1) {
+          delete[] str;
+          break;
+        }
+
+        const char *got = instance()->debugger().equates()->getCompletions();
+
+        if(possibilities == 1) {
+          // add to buffer as though user typed it (plus a space)
+          _currentPos = _promptStartPos + lastSpace + 1;
+          while(*got != '\0') {
+            _buffer[_currentPos++] = *got++;
+          }
+          _buffer[_currentPos++] = ' ';
+          _promptEndPos = _currentPos;
+        } else {
+          // add to buffer as-is, then add PROMPT plus whatever the user's typed
+          print(got);
+          print("\n");
+          print(PROMPT);
+          print(str);
+          int offset = _currentPos - oldPos;
+          _promptStartPos += offset;
+          _promptEndPos += offset;
+        }
+        draw();
+        delete[] str;
+        break;
+    }
+
     case 8:  // backspace
       if (_currentPos > _promptStartPos)
         killChar(-1);