MyGUI_EditText.cpp

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */
 
#include "MyGUI_Precompiled.h"
#include "MyGUI_EditText.h"
#include "MyGUI_RenderItem.h"
#include "MyGUI_FontManager.h"
#include "MyGUI_RenderManager.h"
#include "MyGUI_LanguageManager.h"
#include "MyGUI_TextIterator.h"
#include "MyGUI_IRenderTarget.h"
#include "MyGUI_FontData.h"
#include "MyGUI_CommonStateInfo.h"
 
namespace MyGUI
{
 
    const size_t SIMPLETEXT_COUNT_VERTEX = 32 * VertexQuad::VertexCount;
 
    EditText::EditText() :
        mCountVertex(SIMPLETEXT_COUNT_VERTEX)
    {
        mVertexFormat = RenderManager::getInstance().getVertexFormat();
    }
 
    void EditText::setVisible(bool _visible)
    {
        if (mVisible == _visible)
            return;
        mVisible = _visible;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::_correctView()
    {
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::_setAlign(const IntSize& _oldsize)
    {
        if (mWordWrap)
        {
            // передается старая координата всегда
            int width = mCroppedParent->getWidth();
            if (mOldWidth != width)
            {
                mOldWidth = width;
                mTextOutDate = true;
            }
        }
 
        // первоначальное выравнивание
        if (mAlign.isHStretch())
        {
            // растягиваем
            mCoord.width = mCoord.width + (mCroppedParent->getWidth() - _oldsize.width);
            mIsMargin = true; // при изменении размеров все пересчитывать
        }
        else if (mAlign.isRight())
        {
            // двигаем по правому краю
            mCoord.left = mCoord.left + (mCroppedParent->getWidth() - _oldsize.width);
        }
        else if (mAlign.isHCenter())
        {
            // выравнивание по горизонтали без растяжения
            mCoord.left = (mCroppedParent->getWidth() - mCoord.width) / 2;
        }
 
        if (mAlign.isVStretch())
        {
            // растягиваем
            mCoord.height = mCoord.height + (mCroppedParent->getHeight() - _oldsize.height);
            mIsMargin = true; // при изменении размеров все пересчитывать
        }
        else if (mAlign.isBottom())
        {
            // двигаем по нижнему краю
            mCoord.top = mCoord.top + (mCroppedParent->getHeight() - _oldsize.height);
        }
        else if (mAlign.isVCenter())
        {
            // выравнивание по вертикали без растяжения
            mCoord.top = (mCroppedParent->getHeight() - mCoord.height) / 2;
        }
 
        mCurrentCoord = mCoord;
        _updateView();
    }
 
    void EditText::_updateView()
    {
        bool margin = _checkMargin();
 
        mEmptyView = ((0 >= _getViewWidth()) || (0 >= _getViewHeight()));
 
        mCurrentCoord.left = mCoord.left + mMargin.left;
        mCurrentCoord.top = mCoord.top + mMargin.top;
 
        // вьюпорт стал битым
        if (margin)
        {
            // проверка на полный выход за границу
            if (_checkOutside())
            {
                // запоминаем текущее состояние
                mIsMargin = margin;
 
                // обновить перед выходом
                if (nullptr != mNode)
                    mNode->outOfDate(mRenderItem);
                return;
            }
        }
 
        // мы обрезаны или были обрезаны
        if (mIsMargin || margin)
        {
            mCurrentCoord.width = _getViewWidth();
            mCurrentCoord.height = _getViewHeight();
        }
 
        // запоминаем текущее состояние
        mIsMargin = margin;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::setCaption(const UString& _value)
    {
        mCaption = _value;
        mUtf32Caption = mCaption.asUTF32();
        mTextOutDate = true;
 
        checkVertexSize();
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::checkVertexSize()
    {
        // reallocate if we need more vertices (extra vertices for selection * 2 and cursor)
        size_t need = (mUtf32Caption.size() * (mShadow ? 3 : 2) + 2) * VertexQuad::VertexCount;
        if (mCountVertex < need)
        {
            mCountVertex = need + SIMPLETEXT_COUNT_VERTEX;
            if (nullptr != mRenderItem)
                mRenderItem->reallockDrawItem(this, mCountVertex);
        }
    }
 
    unsigned int EditText::getMixedNativeAlpha(float secondAlpha) const
    {
        return (uint8)(mAlpha * secondAlpha * 255) << 24;
    }
 
    const UString& EditText::getCaption() const
    {
        return mCaption;
    }
 
    void EditText::setTextColour(const Colour& _value)
    {
        mManualColour = true;
        _setTextColour(_value);
    }
 
    void EditText::_setTextColour(const Colour& _value)
    {
        if (mColour == _value)
            return;
 
        mColour = _value;
        mCurrentColourNative = texture_utility::toNativeColour(mColour, mVertexFormat);
 
        mCurrentColourNative = (mCurrentColourNative & 0x00FFFFFF) | getMixedNativeAlpha(mColour.alpha);
        mInverseColourNative = mCurrentColourNative ^ 0x00FFFFFF;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    const Colour& EditText::getTextColour() const
    {
        return mColour;
    }
 
    void EditText::setAlpha(float _value)
    {
        if (mAlpha == _value)
            return;
        mAlpha = _value;
 
        mCurrentColourNative = (mCurrentColourNative & 0x00FFFFFF) | getMixedNativeAlpha(mColour.alpha);
        mShadowColourNative = (mShadowColourNative & 0x00FFFFFF) | getMixedNativeAlpha(mShadowColour.alpha);
        mInverseColourNative = mCurrentColourNative ^ 0x00FFFFFF;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::setFontName(std::string_view _value)
    {
        mTexture = nullptr;
        mFont = FontManager::getInstance().getByName(_value);
        if (mFont != nullptr)
        {
            mTexture = mFont->getTextureFont();
 
            // set default font height
            if (mFont->getDefaultHeight() != 0 && !mCustomFontHeight)
            {
                mFontHeight = mFont->getDefaultHeight();
            }
        }
 
        mTextOutDate = true;
 
        // если мы были приаттаченны, то удаляем себя
        if (nullptr != mRenderItem)
        {
            mRenderItem->removeDrawItem(this);
            mRenderItem = nullptr;
        }
 
        // если есть текстура, то приаттачиваемся
        if (nullptr != mTexture && nullptr != mNode)
        {
            mRenderItem = mNode->addToRenderItem(mTexture, false, false);
            mRenderItem->addDrawItem(this, mCountVertex);
        }
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    std::string_view EditText::getFontName() const
    {
        return mFont->getResourceName();
    }
 
    void EditText::setFontHeight(int _value)
    {
        mCustomFontHeight = _value;
        if (!mCustomFontHeight && mFont)
            mFontHeight = mFont->getDefaultHeight();
        else
            mFontHeight = _value;
        mTextOutDate = true;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    int EditText::getFontHeight() const
    {
        return mFontHeight;
    }
 
    void EditText::createDrawItem(ITexture* _texture, ILayerNode* _node)
    {
        mNode = _node;
        // если уже есть текстура, то атачимся, актуально для смены леера
        if (nullptr != mTexture)
        {
            MYGUI_ASSERT(!mRenderItem, "mRenderItem must be nullptr");
 
            mRenderItem = mNode->addToRenderItem(mTexture, false, false);
            mRenderItem->addDrawItem(this, mCountVertex);
        }
    }
 
    void EditText::destroyDrawItem()
    {
        if (nullptr != mRenderItem)
        {
            mRenderItem->removeDrawItem(this);
            mRenderItem = nullptr;
        }
        mNode = nullptr;
    }
 
    size_t EditText::getTextSelectionStart() const
    {
        return mStartSelect;
    }
 
    size_t EditText::getTextSelectionEnd() const
    {
        return mEndSelect;
    }
 
    void EditText::setTextSelection(size_t _start, size_t _end)
    {
        mStartSelect = _start;
        mEndSelect = _end;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    bool EditText::getSelectBackground() const
    {
        return mBackgroundNormal;
    }
 
    void EditText::setSelectBackground(bool _normal)
    {
        if (mBackgroundNormal == _normal)
            return;
        mBackgroundNormal = _normal;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    bool EditText::isVisibleCursor() const
    {
        return mVisibleCursor;
    }
 
    void EditText::setVisibleCursor(bool _value)
    {
        if (mVisibleCursor == _value)
            return;
        mVisibleCursor = _value;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    size_t EditText::getCursorPosition() const
    {
        return mCursorPosition;
    }
 
    void EditText::setCursorPosition(size_t _index)
    {
        if (mCursorPosition == _index)
            return;
        mCursorPosition = _index;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::setTextAlign(Align _value)
    {
        mTextAlign = _value;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    Align EditText::getTextAlign() const
    {
        return mTextAlign;
    }
 
    IntSize EditText::getTextSize() const
    {
        // если нуно обновить, или изменились пропорции экрана
        if (mTextOutDate)
            updateRawData();
 
        IntSize size = mTextView.getViewSize();
        // плюс размер курсора
        if (mIsAddCursorWidth)
            size.width += 2;
 
        if (mShadow)
        {
            if (!mIsAddCursorWidth)
                size.width++;
            size.height++;
        }
 
        return size;
    }
 
    const VectorLineInfo& EditText::getLineInfo() const
    {
        return mTextView.getData();
    }
 
    void EditText::setViewOffset(const IntPoint& _point)
    {
        mViewOffset = _point;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    IntPoint EditText::getViewOffset() const
    {
        return mViewOffset;
    }
 
    size_t EditText::getCursorPosition(const IntPoint& _point) const
    {
        if (nullptr == mFont)
            return 0;
 
        if (mTextOutDate)
            updateRawData();
 
        IntPoint point = _point;
        point -= mCroppedParent->getAbsolutePosition();
        point += mViewOffset;
        point -= mCoord.point();
 
        return mTextView.getCursorPosition(point);
    }
 
    IntCoord EditText::getCursorCoord(size_t _position) const
    {
        if (nullptr == mFont)
            return {};
 
        if (mTextOutDate)
            updateRawData();
 
        IntPoint point = mTextView.getCursorPoint(_position);
        point += mCroppedParent->getAbsolutePosition();
        point -= mViewOffset;
        point += mCoord.point();
 
        return {point.left, point.top, 2, mFontHeight};
    }
 
    void EditText::setShiftText(bool _value)
    {
        if (mShiftText == _value)
            return;
        mShiftText = _value;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::setWordWrap(bool _value)
    {
        mWordWrap = _value;
        mTextOutDate = true;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::updateRawData() const
    {
        if (nullptr == mFont)
            return;
        // сбрасывам флаги
        mTextOutDate = false;
 
        int width = -1;
        if (mWordWrap)
        {
            width = mCoord.width;
            // обрезать слова нужно по шарине, которую мы реально используем
            if (mIsAddCursorWidth)
                width -= 2;
        }
 
        mTextView.update(mUtf32Caption, mFont, mFontHeight, mTextAlign, mVertexFormat, width);
    }
 
    void EditText::setStateData(IStateInfo* _data)
    {
        EditTextStateInfo* data = _data->castType<EditTextStateInfo>();
        if (!mManualColour && data->getColour() != Colour::Zero)
            _setTextColour(data->getColour());
        setShiftText(data->getShift());
    }
 
    void EditText::doRender()
    {
        if (nullptr == mFont || !mVisible || mEmptyView)
            return;
 
        if (mRenderItem->getCurrentUpdate() || mTextOutDate)
            updateRawData();
 
        Vertex* vertex = mRenderItem->getCurrentVertexBuffer();
 
        const RenderTargetInfo& renderTargetInfo = mRenderItem->getRenderTarget()->getInfo();
 
        // колличество отрисованных вершин
        size_t vertexCount = 0;
 
        // текущие цвета
        uint32 colour = mCurrentColourNative;
        uint32 inverseColour = mInverseColourNative;
        uint32 selectedColour = mInvertSelect ? inverseColour : colour | 0x00FFFFFF;
 
        const VectorLineInfo& textViewData = mTextView.getData();
 
        float top = (float)(-mViewOffset.top + mCoord.top);
 
        FloatRect vertexRect;
 
        const FloatRect& selectedUVRect =
            mFont->getGlyphInfo(mBackgroundNormal ? FontCodeType::Selected : FontCodeType::SelectedBack)->uvRect;
 
        size_t index = 0;
 
        for (const auto& line : textViewData)
        {
            float left = (float)(line.offset - mViewOffset.left + mCoord.left);
 
            for (const auto& sym : line.symbols)
            {
                if (sym.isColour())
                {
                    colour = sym.getColour() | (colour & 0xFF000000);
                    inverseColour = colour ^ 0x00FFFFFF;
                    selectedColour = mInvertSelect ? inverseColour : colour | 0x00FFFFFF;
                    continue;
                }
 
                // смещение текстуры для фона
                bool select = index >= mStartSelect && index < mEndSelect;
 
                float fullAdvance = sym.getBearingX() + sym.getAdvance();
 
                // Render the selection, if any, first.
                if (select)
                {
                    vertexRect.set(left, top, left + fullAdvance, top + (float)mFontHeight);
 
                    drawGlyph(renderTargetInfo, vertex, vertexCount, vertexRect, selectedUVRect, selectedColour);
                }
 
                // Render the glyph shadow, if any.
                if (mShadow)
                {
                    vertexRect.left = left + sym.getBearingX() + 1.0f;
                    vertexRect.top = top + sym.getBearingY() + 1.0f;
                    vertexRect.right = vertexRect.left + sym.getWidth();
                    vertexRect.bottom = vertexRect.top + sym.getHeight();
 
                    drawGlyph(renderTargetInfo, vertex, vertexCount, vertexRect, sym.getUVRect(), mShadowColourNative);
                }
 
                // Render the glyph itself.
                vertexRect.left = left + sym.getBearingX();
                vertexRect.top = top + sym.getBearingY();
                vertexRect.right = vertexRect.left + sym.getWidth();
                vertexRect.bottom = vertexRect.top + sym.getHeight();
 
                drawGlyph(
                    renderTargetInfo,
                    vertex,
                    vertexCount,
                    vertexRect,
                    sym.getUVRect(),
                    (!select || !mInvertSelect) ? colour : inverseColour);
 
                left += fullAdvance;
                ++index;
            }
 
            top += mFontHeight;
            ++index;
        }
 
        // Render the cursor, if any, last.
        if (mVisibleCursor)
        {
            IntPoint point = mTextView.getCursorPoint(mCursorPosition) - mViewOffset + mCoord.point();
            const GlyphInfo* cursorGlyph = mFont->getGlyphInfo(static_cast<Char>(FontCodeType::Cursor));
            vertexRect.set(
                (float)point.left,
                (float)point.top,
                (float)point.left + cursorGlyph->width,
                (float)(point.top + mFontHeight));
 
            drawGlyph(
                renderTargetInfo,
                vertex,
                vertexCount,
                vertexRect,
                cursorGlyph->uvRect,
                mCurrentColourNative | 0x00FFFFFF);
        }
 
        // колличество реально отрисованных вершин
        mRenderItem->setLastVertexCount(vertexCount);
    }
 
    void EditText::setInvertSelected(bool _value)
    {
        if (mInvertSelect == _value)
            return;
        mInvertSelect = _value;
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    bool EditText::getInvertSelected() const
    {
        return mInvertSelect;
    }
 
    bool EditText::getShadow() const
    {
        return mShadow;
    }
 
    void EditText::setShadow(bool _value)
    {
        mShadow = _value;
        mTextOutDate = true;
 
        checkVertexSize();
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    void EditText::setShadowColour(const Colour& _value)
    {
        mShadowColour = _value;
        mShadowColourNative = texture_utility::toNativeColour(mShadowColour, mVertexFormat);
 
        mShadowColourNative = (mShadowColourNative & 0x00FFFFFF) | getMixedNativeAlpha(mShadowColour.alpha);
 
        if (nullptr != mNode)
            mNode->outOfDate(mRenderItem);
    }
 
    const Colour& EditText::getShadowColour() const
    {
        return mShadowColour;
    }
 
    void EditText::drawQuad(
        Vertex*& _vertex,
        size_t& _vertexCount,
        const FloatRect& _vertexRect,
        float _vertexZ,
        const FloatRect& _textureRect,
        uint32 _colour) const
    {
        _vertex[0].x = _vertexRect.left;
        _vertex[0].y = _vertexRect.top;
        _vertex[0].z = _vertexZ;
        _vertex[0].colour = _colour;
        _vertex[0].u = _textureRect.left;
        _vertex[0].v = _textureRect.top;
 
        _vertex[2].x = _vertexRect.left;
        _vertex[2].y = _vertexRect.bottom;
        _vertex[2].z = _vertexZ;
        _vertex[2].colour = _colour;
        _vertex[2].u = _textureRect.left;
        _vertex[2].v = _textureRect.bottom;
 
        _vertex[1].x = _vertexRect.right;
        _vertex[1].y = _vertexRect.top;
        _vertex[1].z = _vertexZ;
        _vertex[1].colour = _colour;
        _vertex[1].u = _textureRect.right;
        _vertex[1].v = _textureRect.top;
 
        _vertex[3].x = _vertexRect.right;
        _vertex[3].y = _vertexRect.top;
        _vertex[3].z = _vertexZ;
        _vertex[3].colour = _colour;
        _vertex[3].u = _textureRect.right;
        _vertex[3].v = _textureRect.top;
 
        _vertex[5].x = _vertexRect.left;
        _vertex[5].y = _vertexRect.bottom;
        _vertex[5].z = _vertexZ;
        _vertex[5].colour = _colour;
        _vertex[5].u = _textureRect.left;
        _vertex[5].v = _textureRect.bottom;
 
        _vertex[4].x = _vertexRect.right;
        _vertex[4].y = _vertexRect.bottom;
        _vertex[4].z = _vertexZ;
        _vertex[4].colour = _colour;
        _vertex[4].u = _textureRect.right;
        _vertex[4].v = _textureRect.bottom;
 
        _vertex += VertexQuad::VertexCount;
        _vertexCount += VertexQuad::VertexCount;
    }
 
    void EditText::drawGlyph(
        const RenderTargetInfo& _renderTargetInfo,
        Vertex*& _vertex,
        size_t& _vertexCount,
        FloatRect _vertexRect,
        FloatRect _textureRect,
        uint32 _colour) const
    {
        // символ залазиет влево
        float leftClip = (float)mCurrentCoord.left - _vertexRect.left;
        if (leftClip > 0.0f)
        {
            if ((float)mCurrentCoord.left < _vertexRect.right)
            {
                _textureRect.left += _textureRect.width() * leftClip / _vertexRect.width();
                _vertexRect.left += leftClip;
            }
            else
            {
                return;
            }
        }
 
        // символ залазиет вправо
        float rightClip = _vertexRect.right - (float)mCurrentCoord.right();
        if (rightClip > 0.0f)
        {
            if (_vertexRect.left < (float)mCurrentCoord.right())
            {
                _textureRect.right -= _textureRect.width() * rightClip / _vertexRect.width();
                _vertexRect.right -= rightClip;
            }
            else
            {
                return;
            }
        }
 
        // символ залазиет вверх
        float topClip = (float)mCurrentCoord.top - _vertexRect.top;
        if (topClip > 0.0f)
        {
            if ((float)mCurrentCoord.top < _vertexRect.bottom)
            {
                _textureRect.top += _textureRect.height() * topClip / _vertexRect.height();
                _vertexRect.top += topClip;
            }
            else
            {
                return;
            }
        }
 
        // символ залазиет вниз
        float bottomClip = _vertexRect.bottom - (float)mCurrentCoord.bottom();
        if (bottomClip > 0.0f)
        {
            if (_vertexRect.top < (float)mCurrentCoord.bottom())
            {
                _textureRect.bottom -= _textureRect.height() * bottomClip / _vertexRect.height();
                _vertexRect.bottom -= bottomClip;
            }
            else
            {
                return;
            }
        }
 
        float pix_left = mCroppedParent->getAbsoluteLeft() - _renderTargetInfo.leftOffset + _vertexRect.left;
        float pix_top = mCroppedParent->getAbsoluteTop() - _renderTargetInfo.topOffset + (mShiftText ? 1.0f : 0.0f) +
            _vertexRect.top;
 
        FloatRect vertexRect(
            ((_renderTargetInfo.pixScaleX * pix_left + _renderTargetInfo.hOffset) * 2.0f) - 1.0f,
            -(((_renderTargetInfo.pixScaleY * pix_top + _renderTargetInfo.vOffset) * 2.0f) - 1.0f),
            ((_renderTargetInfo.pixScaleX * (pix_left + _vertexRect.width()) + _renderTargetInfo.hOffset) * 2.0f) -
                1.0f,
            -(((_renderTargetInfo.pixScaleY * (pix_top + _vertexRect.height()) + _renderTargetInfo.vOffset) * 2.0f) -
              1.0f));
 
        drawQuad(_vertex, _vertexCount, vertexRect, mNode->getNodeDepth(), _textureRect, _colour);
    }
 
} // namespace MyGUI