Widgets/[Rich]TextAreaWidget: Add copy/cut/paste support

src/Nazara/Widgets/AbstractTextAreaWidget.cpp

@@ -165,6 +165,59 @@ namespace Nz
 
 		switch (key.virtualKey)
 		{
+			// Copy (Ctrl+C)
+			case Keyboard::VKey::C:
+			{
+				if (!key.control)
+					break;
+
+				bool ignoreDefaultAction = (m_echoMode != EchoMode::Normal);
+				OnTextAreaKeyCopy(this, &ignoreDefaultAction);
+
+				if (ignoreDefaultAction || !HasSelection())
+					return true;
+
+				CopySelectionToClipboard(m_cursorPositionBegin, m_cursorPositionEnd);
+				return true;
+			}
+
+			// Paste (Ctrl+V)
+			case Keyboard::VKey::V:
+			{
+				if (!key.control)
+					break;
+
+				bool ignoreDefaultAction = false;
+				OnTextAreaKeyPaste(this, &ignoreDefaultAction);
+
+				if (ignoreDefaultAction)
+					return true;
+
+				if (HasSelection())
+					EraseSelection();
+
+				PasteFromClipboard(m_cursorPositionBegin);
+				return true;
+			}
+
+			// Cut (Ctrl+X)
+			case Keyboard::VKey::X:
+			{
+				if (!key.control)
+					break;
+
+				bool ignoreDefaultAction = (m_echoMode != EchoMode::Normal);
+				OnTextAreaKeyCut(this, &ignoreDefaultAction);
+
+				if (ignoreDefaultAction || !HasSelection())
+					return true;
+
+				CopySelectionToClipboard(m_cursorPositionBegin, m_cursorPositionEnd);
+				EraseSelection();
+
+				return true;
+			}
+
 			case Keyboard::VKey::Backspace:
 			{
 				bool ignoreDefaultAction = false;

src/Nazara/Widgets/RichTextAreaWidget.cpp

@@ -154,6 +154,11 @@ namespace Nz
 		UpdateDisplayText();
 	}
 
+	void RichTextAreaWidget::CopySelectionToClipboard(const Vector2ui& selectionBegin, const Vector2ui& selectionEnd)
+	{
+		// TODO
+	}
+
 	AbstractTextDrawer& RichTextAreaWidget::GetTextDrawer()
 	{
 		return m_drawer;
@@ -176,6 +181,11 @@ namespace Nz
 	{
 	}
 
+	void RichTextAreaWidget::PasteFromClipboard(const Vector2ui& targetPosition)
+	{
+		// TODO
+	}
+
 	void RichTextAreaWidget::UpdateDisplayText()
 	{
 		/*m_drawer.Clear();

src/Nazara/Widgets/TextAreaWidget.cpp

@@ -5,6 +5,7 @@
 #include <Nazara/Widgets/TextAreaWidget.hpp>
 #include <Nazara/Core/Unicode.hpp>
 #include <Nazara/Graphics/Components/GraphicsComponent.hpp>
+#include <Nazara/Platform/Clipboard.hpp>
 #include <Nazara/Utility/Font.hpp>
 #include <Nazara/Utility/Components/NodeComponent.hpp>
 #include <Nazara/Widgets/Debug.hpp>
@@ -110,6 +111,17 @@ namespace Nz
 		}
 	}
 
+	void TextAreaWidget::CopySelectionToClipboard(const Vector2ui& selectionBegin, const Vector2ui& selectionEnd)
+	{
+		std::size_t glyphCount = ComputeCharacterCount(m_text);
+		assert(glyphCount > 0);
+
+		std::size_t startIndex = GetCharacterPosition(m_text, GetGlyphIndex(selectionBegin));
+		std::size_t endIndex = GetCharacterPosition(m_text, std::min(GetGlyphIndex(selectionEnd), glyphCount - 1));
+
+		Clipboard::SetString(m_text.substr(startIndex, endIndex - startIndex));
+	}
+
 	AbstractTextDrawer& TextAreaWidget::GetTextDrawer()
 	{
 		return m_drawer;
@@ -216,6 +228,21 @@ namespace Nz
 		}
 	}
 
+	void TextAreaWidget::PasteFromClipboard(const Vector2ui& targetPosition)
+	{
+		std::size_t glyphCount = ComputeCharacterCount(m_text);
+		std::size_t targetIndex = GetCharacterPosition(m_text, std::min(GetGlyphIndex(targetPosition), glyphCount));
+
+		std::string clipboardString = Clipboard::GetString();
+		if (clipboardString.empty())
+			return;
+
+		m_text.insert(targetIndex, clipboardString);
+		UpdateDisplayText();
+
+		SetCursorPosition(targetIndex + ComputeCharacterCount(clipboardString));
+	}
+
 	void TextAreaWidget::UpdateDisplayText()
 	{
 		switch (m_echoMode)