Debugger: Initial GUI for expression evaluation.

- Add a simple interface window for expression evaluation. Not yet
  accessible from the team window.

src/apps/debugger/Jamfile

@@ -264,6 +264,7 @@ Application Debugger :
 	BreakpointListView.cpp
 	BreakpointsView.cpp
 	ConsoleOutputView.cpp
+	ExpressionEvaluationWindow.cpp
 	ImageFunctionsView.cpp
 	ImageListView.cpp
 	RegistersView.cpp

src/apps/debugger/user_interface/gui/team_window/ExpressionEvaluationWindow.cpp

@@ -0,0 +1,128 @@
+/*
+ * Copyright 2014, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#include "ExpressionEvaluationWindow.h"
+
+#include <Alert.h>
+#include <Button.h>
+#include <LayoutBuilder.h>
+#include <String.h>
+#include <StringView.h>
+#include <TextControl.h>
+
+#include "MessageCodes.h"
+#include "SourceLanguage.h"
+#include "UserInterface.h"
+#include "Value.h"
+
+
+enum {
+	MSG_EVALUATE_EXPRESSION = 'evex'
+};
+
+
+ExpressionEvaluationWindow::ExpressionEvaluationWindow(
+	SourceLanguage* language, UserInterfaceListener* listener)
+	:
+	BWindow(BRect(), "Evaluate Expression", B_FLOATING_WINDOW,
+		B_AUTO_UPDATE_SIZE_LIMITS | B_CLOSE_ON_ESCAPE),
+	fLanguage(language),
+	fListener(listener)
+{
+	fLanguage->AcquireReference();
+}
+
+
+ExpressionEvaluationWindow::~ExpressionEvaluationWindow()
+{
+	fLanguage->ReleaseReference();
+}
+
+
+ExpressionEvaluationWindow*
+ExpressionEvaluationWindow::Create(SourceLanguage* language,
+	UserInterfaceListener* listener)
+{
+	ExpressionEvaluationWindow* self = new ExpressionEvaluationWindow(
+		language, listener);
+
+	try {
+		self->_Init();
+	} catch (...) {
+		delete self;
+		throw;
+	}
+
+	return self;
+
+}
+
+
+void
+ExpressionEvaluationWindow::_Init()
+{
+	fExpressionInput = new BTextControl("Expression:", NULL, NULL);
+	BLayoutItem* labelItem = fExpressionInput->CreateLabelLayoutItem();
+	labelItem->View()->SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
+	BLayoutBuilder::Group<>(this, B_VERTICAL)
+		.SetInsets(B_USE_DEFAULT_SPACING)
+		.AddGroup(B_HORIZONTAL, 4.0f)
+			.Add(labelItem)
+			.Add(fExpressionInput->CreateTextViewLayoutItem())
+		.End()
+		.AddGroup(B_HORIZONTAL, 4.0f)
+			.Add(new BStringView("OutputLabelView", "Result:"))
+			.Add((fExpressionOutput = new BStringView("ExpressionOutputView",
+					NULL)))
+		.End()
+		.AddGroup(B_HORIZONTAL, 4.0f)
+			.AddGlue()
+			.Add((fEvaluateButton = new BButton("Evaluate",
+					new BMessage(MSG_EVALUATE_EXPRESSION))))
+		.End();
+
+	fEvaluateButton->SetTarget(this);
+
+}
+
+
+void
+ExpressionEvaluationWindow::Show()
+{
+	CenterOnScreen();
+	BWindow::Show();
+}
+
+
+void
+ExpressionEvaluationWindow::MessageReceived(BMessage* message)
+{
+	switch (message->what) {
+		case MSG_EVALUATE_EXPRESSION:
+		{
+			Value* value = NULL;
+			status_t error = fLanguage->EvaluateExpression(
+				fExpressionInput->TextView()->Text(), value);
+			if (error != B_OK) {
+				BString errorText;
+				errorText.SetToFormat("Failed to evaluate expression: %s",
+					strerror(error));
+				BAlert* alert = new(std::nothrow) BAlert("Evaluate Expression",
+					errorText.String(), "Close");
+				if (alert != NULL)
+					alert->Go();
+				break;
+			}
+
+			BString valueText;
+			value->ToString(valueText);
+			fExpressionOutput->SetText(valueText);
+			break;
+		}
+		default:
+			BWindow::MessageReceived(message);
+			break;
+	}
+
+}

src/apps/debugger/user_interface/gui/team_window/ExpressionEvaluationWindow.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2014, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef EXPRESSION_EVALUATION_WINDOW_H
+#define EXPRESSION_EVALUATION_WINDOW_H
+
+
+#include <Window.h>
+
+#include "types/Types.h"
+
+
+class BButton;
+class BStringView;
+class BTextControl;
+class SourceLanguage;
+class UserInterfaceListener;
+
+
+class ExpressionEvaluationWindow : public BWindow
+{
+public:
+								ExpressionEvaluationWindow(
+									SourceLanguage* language,
+									UserInterfaceListener* listener);
+
+								~ExpressionEvaluationWindow();
+
+	static	ExpressionEvaluationWindow* Create(
+									SourceLanguage* language,
+									UserInterfaceListener* listener);
+									// throws
+
+
+	virtual	void				MessageReceived(BMessage* message);
+
+	virtual	void				Show();
+
+private:
+			void	 			_Init();
+
+
+private:
+			SourceLanguage*		fLanguage;
+			BTextControl*		fExpressionInput;
+			BStringView*		fExpressionOutput;
+			BButton*			fEvaluateButton;
+			UserInterfaceListener* fListener;
+};
+
+#endif // EXPRESSION_EVALUATION_WINDOW_H