Widgets: Add [Rich]TextAreaWidget
This commit is contained in:
Jérôme Leclercq
255
src/Nazara/Widgets/TextAreaWidget.cpp
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255
src/Nazara/Widgets/TextAreaWidget.cpp
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// Copyright (C) 2021 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/TextAreaWidget.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/Debug.hpp>
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namespace Nz
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{
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TextAreaWidget::TextAreaWidget(BaseWidget* parent) :
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AbstractTextAreaWidget(parent)
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{
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SetCharacterSize(GetCharacterSize()); //< Actualize minimum / preferred size
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Layout();
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}
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void TextAreaWidget::AppendText(const std::string& text)
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{
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m_text += text;
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switch (m_echoMode)
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{
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case EchoMode::Normal:
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m_drawer.AppendText(text);
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break;
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case EchoMode::Hidden:
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m_drawer.AppendText(std::string(ComputeCharacterCount(text), '*'));
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break;
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case EchoMode::HiddenExceptLast:
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{
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m_drawer.Clear();
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std::size_t textLength = ComputeCharacterCount(m_text);
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if (textLength >= 2)
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{
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std::size_t lastCharacterPosition = GetCharacterPosition(m_text, textLength - 2);
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if (lastCharacterPosition != std::string::npos)
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m_drawer.AppendText(std::string(textLength - 1, '*'));
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}
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if (textLength >= 1)
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m_drawer.AppendText(m_text.substr(GetCharacterPosition(m_text, textLength - 1))); //< FIXME: getting last character position could be massively optimized
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break;
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}
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}
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UpdateTextSprite();
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OnTextChanged(this, m_text);
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}
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void TextAreaWidget::Clear()
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{
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AbstractTextAreaWidget::Clear();
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m_text.clear();
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OnTextChanged(this, m_text);
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}
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void TextAreaWidget::Erase(std::size_t firstGlyph, std::size_t lastGlyph)
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{
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if (firstGlyph > lastGlyph)
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std::swap(firstGlyph, lastGlyph);
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std::size_t textLength = ComputeCharacterCount(m_text);
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if (firstGlyph > textLength)
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return;
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std::string newText;
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if (firstGlyph > 0)
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{
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std::size_t characterPosition = GetCharacterPosition(m_text, firstGlyph);
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NazaraAssert(characterPosition != std::string::npos, "Invalid character position");
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newText.append(m_text.substr(0, characterPosition));
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}
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if (lastGlyph < textLength)
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{
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std::size_t characterPosition = GetCharacterPosition(m_text, lastGlyph);
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NazaraAssert(characterPosition != std::string::npos, "Invalid character position");
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newText.append(m_text.substr(characterPosition));
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}
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SetText(newText);
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}
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void TextAreaWidget::Write(const std::string& text, std::size_t glyphPosition)
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{
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if (glyphPosition >= m_drawer.GetGlyphCount())
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{
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// It's faster to append than to insert in the middle
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AppendText(text);
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SetCursorPosition(m_drawer.GetGlyphCount());
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}
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else
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{
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m_text.insert(GetCharacterPosition(m_text, glyphPosition), text);
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SetText(m_text);
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SetCursorPosition(glyphPosition + ComputeCharacterCount(text));
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}
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}
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AbstractTextDrawer& TextAreaWidget::GetTextDrawer()
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{
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return m_drawer;
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}
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const AbstractTextDrawer& TextAreaWidget::GetTextDrawer() const
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{
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return m_drawer;
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}
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void TextAreaWidget::HandleIndentation(bool add)
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{
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if (add)
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Write("\t");
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else
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{
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std::size_t currentGlyph = GetGlyphIndex(m_cursorPositionBegin);
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if (currentGlyph > 0 && m_text[GetCharacterPosition(m_text, currentGlyph - 1U)] == '\t') // Check if previous glyph is a tab
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{
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Erase(currentGlyph - 1U);
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if (m_cursorPositionBegin.x < static_cast<unsigned int>(m_drawer.GetLineGlyphCount(m_cursorPositionBegin.y)))
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MoveCursor(-1);
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}
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}
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}
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void TextAreaWidget::HandleSelectionIndentation(bool add)
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{
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for (unsigned line = m_cursorPositionBegin.y; line <= m_cursorPositionEnd.y; ++line)
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{
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const Vector2ui cursorPositionBegin = m_cursorPositionBegin;
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const Vector2ui cursorPositionEnd = m_cursorPositionEnd;
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if (add)
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{
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Write("\t", {0U, line});
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SetSelection(cursorPositionBegin + (cursorPositionBegin.y == line && cursorPositionBegin.x != 0U ? Vector2ui{ 1U, 0U } : Vector2ui{}),
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cursorPositionEnd + (cursorPositionEnd.y == line ? Vector2ui{ 1U, 0U } : Vector2ui{}));
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}
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else
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{
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if (m_drawer.GetLineGlyphCount(line) == 0)
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continue;
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std::size_t firstGlyph = GetGlyphIndex({ 0U, line });
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if (m_text[GetCharacterPosition(m_text, firstGlyph)] == '\t')
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{
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Erase(firstGlyph);
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SetSelection(cursorPositionBegin - (cursorPositionBegin.y == line && cursorPositionBegin.x != 0U ? Vector2ui{ 1U, 0U } : Vector2ui{}),
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cursorPositionEnd - (cursorPositionEnd.y == line && cursorPositionEnd.x != 0U ? Vector2ui{ 1U, 0U } : Vector2ui{}));
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}
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}
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}
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}
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void TextAreaWidget::HandleWordCursorMove(bool left)
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{
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if (left)
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{
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std::size_t index = GetGlyphIndex(m_cursorPositionBegin);
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if (index == 0)
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return;
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std::size_t spaceIndex = m_text.rfind(' ', index - 2);
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std::size_t endlIndex = m_text.rfind('\n', index - 1);
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if ((spaceIndex > endlIndex || endlIndex == std::string::npos) && spaceIndex != std::string::npos)
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SetCursorPosition(spaceIndex + 1);
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else if (endlIndex != std::string::npos)
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{
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if (index == endlIndex + 1)
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SetCursorPosition(endlIndex);
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else
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SetCursorPosition(endlIndex + 1);
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}
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else
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SetCursorPosition({ 0U, m_cursorPositionBegin.y });
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}
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else
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{
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std::size_t index = GetGlyphIndex(m_cursorPositionEnd);
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std::size_t spaceIndex = m_text.find(' ', index);
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std::size_t endlIndex = m_text.find('\n', index);
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if (spaceIndex < endlIndex && spaceIndex != std::string::npos)
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{
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if (ComputeCharacterCount(m_text) > spaceIndex)
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SetCursorPosition(spaceIndex + 1);
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else
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SetCursorPosition({ static_cast<unsigned int>(m_drawer.GetLineGlyphCount(m_cursorPositionEnd.y)), m_cursorPositionEnd.y });
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}
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else if (endlIndex != std::string::npos)
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{
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if (index == endlIndex)
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SetCursorPosition(endlIndex + 1);
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else
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SetCursorPosition(endlIndex);
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}
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else
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SetCursorPosition({ static_cast<unsigned int>(m_drawer.GetLineGlyphCount(m_cursorPositionEnd.y)), m_cursorPositionEnd.y });
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}
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}
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void TextAreaWidget::UpdateDisplayText()
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{
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switch (m_echoMode)
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{
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case EchoMode::Normal:
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m_drawer.SetText(m_text);
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break;
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case EchoMode::Hidden:
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case EchoMode::HiddenExceptLast:
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m_drawer.SetText(std::string(ComputeCharacterCount(m_text), '*'));
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break;
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}
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UpdateTextSprite();
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SetCursorPosition(m_cursorPositionBegin); //< Refresh cursor position (prevent it from being outside of the text)
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}
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void TextAreaWidget::UpdateMinimumSize()
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{
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std::size_t fontCount = m_drawer.GetFontCount();
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float lineHeight = 0;
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int spaceAdvance = 0;
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for (std::size_t i = 0; i < fontCount; ++i)
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{
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const std::shared_ptr<Font>& font = m_drawer.GetFont(i);
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const Font::SizeInfo& sizeInfo = font->GetSizeInfo(m_drawer.GetCharacterSize());
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lineHeight = std::max(lineHeight, m_drawer.GetLineHeight());
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spaceAdvance = std::max(spaceAdvance, sizeInfo.spaceAdvance);
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}
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Vector2f size = { float(spaceAdvance), lineHeight + 5.f };
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SetMinimumSize(size);
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}
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}
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