625 lines
16 KiB
C++
625 lines
16 KiB
C++
// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
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// This file is part of the "Nazara Engine - Widgets module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Widgets/AbstractTextAreaWidget.hpp>
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#include <Nazara/Core/StringExt.hpp>
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#include <Nazara/Core/Unicode.hpp>
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#include <Nazara/Graphics/Components/GraphicsComponent.hpp>
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#include <Nazara/Utility/Font.hpp>
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#include <Nazara/Utility/Components/NodeComponent.hpp>
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#include <Nazara/Widgets/Canvas.hpp>
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#include <Nazara/Widgets/Widgets.hpp>
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#include <Nazara/Widgets/Debug.hpp>
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namespace Nz
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{
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namespace
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{
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constexpr float s_textAreaPaddingWidth = 5.f;
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constexpr float s_textAreaPaddingHeight = 3.f;
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}
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AbstractTextAreaWidget::AbstractTextAreaWidget(BaseWidget* parent) :
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BaseWidget(parent),
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m_characterFilter(),
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m_echoMode(EchoMode::Normal),
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m_cursorPositionBegin(0U, 0U),
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m_cursorPositionEnd(0U, 0U),
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m_isLineWrapEnabled(false),
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m_isMouseButtonDown(false),
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m_multiLineEnabled(false),
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m_readOnly(false),
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m_tabEnabled(false)
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{
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m_textSprite = std::make_shared<TextSprite>(Widgets::Instance()->GetTransparentMaterial());
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auto& registry = GetRegistry();
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m_textEntity = CreateEntity();
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auto& gfxComponent = registry.emplace<GraphicsComponent>(m_textEntity, IsVisible());
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gfxComponent.AttachRenderable(m_textSprite, GetCanvas()->GetRenderMask());
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auto& textNode = GetRegistry().emplace<NodeComponent>(m_textEntity);
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textNode.SetParent(this);
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textNode.SetPosition(s_textAreaPaddingWidth, GetHeight() - s_textAreaPaddingHeight);
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SetCursor(SystemCursor::Text);
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EnableBackground(true);
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}
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void AbstractTextAreaWidget::Clear()
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{
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AbstractTextDrawer& textDrawer = GetTextDrawer();
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textDrawer.Clear();
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UpdateTextSprite();
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m_cursorPositionBegin.MakeZero();
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m_cursorPositionEnd.MakeZero();
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RefreshCursor();
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}
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void AbstractTextAreaWidget::EnableLineWrap(bool enable)
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{
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if (m_isLineWrapEnabled != enable)
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{
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m_isLineWrapEnabled = enable;
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AbstractTextDrawer& textDrawer = GetTextDrawer();
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if (enable)
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textDrawer.SetMaxLineWidth(GetWidth());
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else
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textDrawer.SetMaxLineWidth(std::numeric_limits<float>::infinity());
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UpdateTextSprite();
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}
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}
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Vector2ui AbstractTextAreaWidget::GetHoveredGlyph(float x, float y) const
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{
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const AbstractTextDrawer& textDrawer = GetTextDrawer();
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auto& textNode = GetRegistry().get<NodeComponent>(m_textEntity);
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Vector2f textPosition = Vector2f(textNode.GetPosition(CoordSys::Local));
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x -= textPosition.x;
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y -= textPosition.y;
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float textHeight = textDrawer.GetBounds().height;
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y = textHeight - y;
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std::size_t glyphCount = textDrawer.GetGlyphCount();
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if (glyphCount > 0)
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{
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std::size_t lineCount = textDrawer.GetLineCount();
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std::size_t line = 0U;
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for (; line < lineCount - 1; ++line)
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{
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Rectf lineBounds = textDrawer.GetLine(line).bounds;
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if (lineBounds.GetMaximum().y > y)
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break;
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}
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std::size_t upperLimit = (line != lineCount - 1) ? textDrawer.GetLine(line + 1).glyphIndex : glyphCount + 1;
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std::size_t firstLineGlyph = textDrawer.GetLine(line).glyphIndex;
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std::size_t i = firstLineGlyph;
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for (; i < upperLimit - 1; ++i)
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{
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Rectf bounds = textDrawer.GetGlyph(i).bounds;
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if (x < bounds.x + bounds.width * 0.75f)
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break;
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}
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return Vector2ui(Vector2<std::size_t>(i - firstLineGlyph, line));
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}
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return Vector2ui::Zero();
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}
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bool AbstractTextAreaWidget::IsFocusable() const
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{
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return !m_readOnly;
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}
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void AbstractTextAreaWidget::Layout()
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{
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BaseWidget::Layout();
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if (m_isLineWrapEnabled)
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{
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AbstractTextDrawer& textDrawer = GetTextDrawer();
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textDrawer.SetMaxLineWidth(GetWidth());
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UpdateTextSprite();
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}
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RefreshCursor();
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}
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void AbstractTextAreaWidget::OnFocusLost()
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{
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// Hide cursors
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auto& registry = GetRegistry();
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for (auto& cursor : m_cursors)
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registry.get<GraphicsComponent>(cursor.entity).Hide();
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}
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void AbstractTextAreaWidget::OnFocusReceived()
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{
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if (!m_readOnly)
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{
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// Show cursors
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auto& registry = GetRegistry();
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for (auto& cursor : m_cursors)
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registry.get<GraphicsComponent>(cursor.entity).Show();
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}
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}
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bool AbstractTextAreaWidget::OnKeyPressed(const WindowEvent::KeyEvent& key)
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{
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const AbstractTextDrawer& textDrawer = GetTextDrawer();
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switch (key.virtualKey)
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{
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// Select All (Ctrl+A)
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case Keyboard::VKey::A:
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{
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if (!key.control)
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break;
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SetSelection(Vector2ui::Zero(), Vector2ui(std::numeric_limits<unsigned int>::max(), std::numeric_limits<unsigned int>::max()));
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return true;
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}
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// Copy (Ctrl+C)
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case Keyboard::VKey::C:
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{
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if (!key.control)
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break;
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bool ignoreDefaultAction = (m_echoMode != EchoMode::Normal);
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OnTextAreaKeyCopy(this, &ignoreDefaultAction);
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if (ignoreDefaultAction || !HasSelection())
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return true;
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CopySelectionToClipboard(m_cursorPositionBegin, m_cursorPositionEnd);
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return true;
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}
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// Paste (Ctrl+V)
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case Keyboard::VKey::V:
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{
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if (!key.control)
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break;
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bool ignoreDefaultAction = false;
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OnTextAreaKeyPaste(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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if (HasSelection())
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EraseSelection();
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PasteFromClipboard(m_cursorPositionBegin);
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return true;
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}
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// Cut (Ctrl+X)
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case Keyboard::VKey::X:
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{
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if (!key.control)
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break;
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bool ignoreDefaultAction = (m_echoMode != EchoMode::Normal);
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OnTextAreaKeyCut(this, &ignoreDefaultAction);
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if (ignoreDefaultAction || !HasSelection())
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return true;
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CopySelectionToClipboard(m_cursorPositionBegin, m_cursorPositionEnd);
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EraseSelection();
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return true;
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}
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case Keyboard::VKey::Backspace:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyBackspace(this, &ignoreDefaultAction);
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std::size_t cursorGlyphEnd = GetGlyphIndex(m_cursorPositionEnd);
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if (ignoreDefaultAction || cursorGlyphEnd == 0)
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return true;
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// When a text is selected, delete key does the same as delete and leave the character behind it
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if (HasSelection())
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EraseSelection();
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else
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{
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MoveCursor(-1);
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Erase(GetGlyphIndex(m_cursorPositionBegin));
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}
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return true;
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}
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case Keyboard::VKey::Delete:
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{
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if (HasSelection())
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EraseSelection();
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else
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Erase(GetGlyphIndex(m_cursorPositionBegin));
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return true;
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}
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case Keyboard::VKey::Down:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyDown(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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if (HasSelection())
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SetCursorPosition(m_cursorPositionEnd);
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MoveCursor({0, 1});
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return true;
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}
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case Keyboard::VKey::End:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyEnd(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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std::size_t lineCount = textDrawer.GetLineCount();
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if (key.control && lineCount > 0)
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SetCursorPosition({ static_cast<unsigned int>(textDrawer.GetLineGlyphCount(lineCount - 1)), static_cast<unsigned int>(lineCount - 1) });
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else
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SetCursorPosition({ static_cast<unsigned int>(textDrawer.GetLineGlyphCount(m_cursorPositionEnd.y)), m_cursorPositionEnd.y });
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return true;
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}
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case Keyboard::VKey::Home:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyHome(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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SetCursorPosition({ 0U, key.control ? 0U : m_cursorPositionEnd.y });
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return true;
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}
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case Keyboard::VKey::Left:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyLeft(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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if (HasSelection())
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SetCursorPosition(m_cursorPositionBegin);
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else if (key.control)
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HandleWordCursorMove(true);
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else
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MoveCursor(-1);
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return true;
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}
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case Keyboard::VKey::Return:
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case Keyboard::VKey::NumpadReturn:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyReturn(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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if (!m_multiLineEnabled)
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break;
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if (HasSelection())
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EraseSelection();
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Write("\n");
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return true;
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}
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case Keyboard::VKey::Right:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyRight(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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if (HasSelection())
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SetCursorPosition(m_cursorPositionEnd);
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else if (key.control)
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HandleWordCursorMove(false);
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else
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MoveCursor(1);
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return true;
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}
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case Keyboard::VKey::Up:
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{
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bool ignoreDefaultAction = false;
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OnTextAreaKeyUp(this, &ignoreDefaultAction);
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if (ignoreDefaultAction)
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return true;
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if (HasSelection())
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SetCursorPosition(m_cursorPositionBegin);
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MoveCursor({0, -1});
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return true;
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}
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case Keyboard::VKey::Tab:
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{
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if (!m_tabEnabled)
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return false;
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if (HasSelection())
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HandleSelectionIndentation(!key.shift);
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else
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HandleIndentation(!key.shift);
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return true;
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}
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default:
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break;
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}
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return false;
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}
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void AbstractTextAreaWidget::OnKeyReleased(const WindowEvent::KeyEvent& /*key*/)
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{
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}
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void AbstractTextAreaWidget::OnMouseButtonDoublePress(int x, int y, Mouse::Button button)
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{
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if (button == Mouse::Left)
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{
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// Shift double click is handled as single click
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if (Keyboard::IsKeyPressed(Keyboard::VKey::LShift) || Keyboard::IsKeyPressed(Keyboard::VKey::RShift))
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return OnMouseButtonPress(x, y, button);
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SetFocus();
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Vector2ui hoveredGlyph = GetHoveredGlyph(float(x), float(y));
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HandleWordSelection(hoveredGlyph);
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m_isMouseButtonDown = true;
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}
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}
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void AbstractTextAreaWidget::OnMouseButtonPress(int x, int y, Mouse::Button button)
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{
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if (button == Mouse::Left)
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{
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SetFocus();
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Vector2ui hoveredGlyph = GetHoveredGlyph(float(x), float(y));
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// Shift extends selection
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if (Keyboard::IsKeyPressed(Keyboard::VKey::LShift) || Keyboard::IsKeyPressed(Keyboard::VKey::RShift))
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SetSelection(hoveredGlyph, m_selectionCursor);
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else
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{
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SetCursorPosition(hoveredGlyph);
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m_selectionCursor = m_cursorPositionBegin;
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}
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m_isMouseButtonDown = true;
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}
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}
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void AbstractTextAreaWidget::OnMouseButtonRelease(int, int, Mouse::Button button)
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{
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if (button == Mouse::Left)
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m_isMouseButtonDown = false;
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}
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void AbstractTextAreaWidget::OnMouseButtonTriplePress(int x, int y, Mouse::Button button)
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{
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if (button == Mouse::Left)
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{
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// Shift triple click is handled as single click
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if (Keyboard::IsKeyPressed(Keyboard::VKey::LShift) || Keyboard::IsKeyPressed(Keyboard::VKey::RShift))
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return OnMouseButtonPress(x, y, button);
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SetFocus();
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Vector2ui hoveredGlyph = GetHoveredGlyph(float(x), float(y));
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SetSelection(Vector2ui(0, hoveredGlyph.y), Vector2ui(std::numeric_limits<unsigned int>::max(), hoveredGlyph.y));
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m_isMouseButtonDown = true;
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}
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}
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void AbstractTextAreaWidget::OnMouseEnter()
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{
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if (!Mouse::IsButtonPressed(Mouse::Left))
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m_isMouseButtonDown = false;
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}
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void AbstractTextAreaWidget::OnMouseMoved(int x, int y, int /*deltaX*/, int /*deltaY*/)
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{
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if (m_isMouseButtonDown)
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SetSelection(m_selectionCursor, GetHoveredGlyph(float(x), float(y)));
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}
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void AbstractTextAreaWidget::OnRenderLayerUpdated(int baseRenderLayer)
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{
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m_textSprite->UpdateRenderLayer(baseRenderLayer);
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for (Cursor& cursor : m_cursors)
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cursor.sprite->UpdateRenderLayer(baseRenderLayer + 1);
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}
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void AbstractTextAreaWidget::OnTextEntered(char32_t character, bool /*repeated*/)
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{
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if (m_readOnly)
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return;
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if (Unicode::GetCategory(character) == Unicode::Category_Other_Control || (m_characterFilter && !m_characterFilter(character)))
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return;
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if (HasSelection())
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EraseSelection();
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Write(FromUtf32String(std::u32string_view(&character, 1)));
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}
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void AbstractTextAreaWidget::RefreshCursor()
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{
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if (m_readOnly)
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return;
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const AbstractTextDrawer& textDrawer = GetTextDrawer();
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auto GetGlyph = [&](const Vector2ui& glyphPosition, std::size_t* glyphIndex) -> const AbstractTextDrawer::Glyph*
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{
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if (glyphPosition.y >= textDrawer.GetLineCount())
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return nullptr;
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const auto& lineInfo = textDrawer.GetLine(glyphPosition.y);
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std::size_t cursorGlyph = GetGlyphIndex({ glyphPosition.x, glyphPosition.y });
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if (glyphIndex)
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*glyphIndex = cursorGlyph;
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std::size_t glyphCount = textDrawer.GetGlyphCount();
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if (glyphCount > 0 && lineInfo.glyphIndex < cursorGlyph)
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{
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const auto& glyph = textDrawer.GetGlyph(std::min(cursorGlyph, glyphCount - 1));
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return &glyph;
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}
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else
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return nullptr;
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};
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auto& registry = GetRegistry();
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// Move text so that cursor always lies in drawer bounds
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const auto* lastGlyph = GetGlyph(m_cursorPositionEnd, nullptr);
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float glyphPos = (lastGlyph) ? lastGlyph->bounds.x : 0.f;
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float glyphWidth = (lastGlyph) ? lastGlyph->bounds.width : 0.f;
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auto& textNode = registry.get<NodeComponent>(m_textEntity);
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float textPosition = textNode.GetPosition(CoordSys::Local).x - s_textAreaPaddingWidth;
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float cursorPosition = glyphPos + textPosition;
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float width = GetWidth();
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if (width <= textDrawer.GetBounds().width)
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{
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if (cursorPosition + glyphWidth > width)
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textNode.Move(width - cursorPosition - glyphWidth, 0.f);
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else if (cursorPosition - glyphWidth < 0.f)
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textNode.Move(-cursorPosition + glyphWidth, 0.f);
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}
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else
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textNode.Move(-textPosition, 0.f); //< Reset text position if we have enough room to show everything
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// Create/destroy cursor entities and sprites
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std::size_t selectionLineCount = m_cursorPositionEnd.y - m_cursorPositionBegin.y + 1;
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std::size_t oldSpriteCount = m_cursors.size();
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if (m_cursors.size() < selectionLineCount)
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{
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m_cursors.resize(selectionLineCount);
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for (std::size_t i = oldSpriteCount; i < m_cursors.size(); ++i)
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{
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m_cursors[i].sprite = std::make_shared<Sprite>(Widgets::Instance()->GetTransparentMaterial());
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m_cursors[i].sprite->UpdateRenderLayer(GetBaseRenderLayer() + 1);
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m_cursors[i].entity = CreateEntity();
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registry.emplace<GraphicsComponent>(m_cursors[i].entity, IsVisible() && HasFocus()).AttachRenderable(m_cursors[i].sprite, GetCanvas()->GetRenderMask());
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registry.emplace<NodeComponent>(m_cursors[i].entity).SetParent(textNode);
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}
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}
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else if (m_cursors.size() > selectionLineCount)
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{
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for (std::size_t i = selectionLineCount; i < m_cursors.size(); ++i)
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DestroyEntity(m_cursors[i].entity);
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m_cursors.resize(selectionLineCount);
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}
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// Resize every cursor sprite
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float textHeight = m_textSprite->GetAABB().height;
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for (unsigned int i = m_cursorPositionBegin.y; i <= m_cursorPositionEnd.y; ++i)
|
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{
|
|
const auto& lineInfo = textDrawer.GetLine(i);
|
|
|
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auto& cursor = m_cursors[i - m_cursorPositionBegin.y];
|
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if (i == m_cursorPositionBegin.y || i == m_cursorPositionEnd.y)
|
|
{
|
|
// Partial selection (or no selection)
|
|
auto GetGlyphPos = [&](const Vector2ui& glyphPosition)
|
|
{
|
|
std::size_t glyphIndex;
|
|
const auto* glyph = GetGlyph(glyphPosition, &glyphIndex);
|
|
if (glyph)
|
|
{
|
|
float position = glyph->bounds.x;
|
|
if (glyphIndex >= textDrawer.GetGlyphCount())
|
|
position += glyph->bounds.width;
|
|
|
|
return position;
|
|
}
|
|
else
|
|
return 0.f;
|
|
};
|
|
|
|
float beginX = (i == m_cursorPositionBegin.y) ? GetGlyphPos({ m_cursorPositionBegin.x, i }) : 0.f;
|
|
float endX = (i == m_cursorPositionEnd.y) ? GetGlyphPos({ m_cursorPositionEnd.x, i }) : lineInfo.bounds.width;
|
|
float spriteSize = std::max(endX - beginX, 1.f);
|
|
|
|
cursor.sprite->SetColor((m_cursorPositionBegin == m_cursorPositionEnd) ? Color::Black : Color(0, 0, 0, 50));
|
|
cursor.sprite->SetSize(Vector2f(spriteSize, lineInfo.bounds.height));
|
|
|
|
registry.get<NodeComponent>(cursor.entity).SetPosition(beginX, textHeight - lineInfo.bounds.y - lineInfo.bounds.height);
|
|
}
|
|
else
|
|
{
|
|
// Full line selection
|
|
cursor.sprite->SetColor(Color(0, 0, 0, 50));
|
|
cursor.sprite->SetSize(Vector2f(lineInfo.bounds.width, lineInfo.bounds.height));
|
|
|
|
registry.get<NodeComponent>(cursor.entity).SetPosition(0.f, textHeight - lineInfo.bounds.y - lineInfo.bounds.height);
|
|
}
|
|
}
|
|
}
|
|
|
|
void AbstractTextAreaWidget::UpdateTextSprite()
|
|
{
|
|
m_textSprite->Update(GetTextDrawer());
|
|
Vector2f textSize = Vector2f(m_textSprite->GetAABB().GetLengths());
|
|
SetPreferredSize(textSize);
|
|
|
|
auto& textNode = GetRegistry().get<NodeComponent>(m_textEntity);
|
|
textNode.SetPosition(s_textAreaPaddingWidth, GetHeight() - s_textAreaPaddingHeight - textSize.y);
|
|
}
|
|
}
|