Method getColFromXOffset

src/eepp/ui/uicodeeditor.cpp:3281–3353

}

Int64 UICodeEditor::getColFromXOffset( VisibleIndex visibleIndex, const Float& x ) const {
	if ( x < 0 || !mFont || mDoc->isLoading() )
		return 0;

	TextPosition pos = mDoc->sanitizePosition( mDocView.getVisibleIndexPosition( visibleIndex ) );

	if ( mDocView.isWrappedLine( pos.line() ) ) {
		auto visibleIndexRange = mDocView.getVisibleIndexRange( visibleIndex );
		auto firstVisibleIndex = mDocView.toVisibleIndex( visibleIndexRange.start().line() );
		Float xOffset = firstVisibleIndex != visibleIndex
							? mDocView.getLinePadding( visibleIndexRange.start().line() )
							: 0;

		auto line = mDoc->line( visibleIndexRange.start().line() )
						.getText()
						.view()
						.substr( visibleIndexRange.start().column(), visibleIndexRange.length() );

		if ( !isMonospaceLine( pos.line() ) ) {
			return visibleIndexRange.start().column() +
				   Text::findCharacterFromPos(
					   Vector2i( eemax( -xOffset + x, 0.f ), 0 ), true, mFont, getCharacterSize(),
					   line, mFontStyleConfig.Style, mTabWidth, 0.f,
					   mTabStops ? 0 : std::optional<Float>(),
					   mDoc->line( pos.line() ).getTextHints() | getWidgetTextDrawHints(),
					   mTextDirection );
		}

		Int64 len = line.length();
		Float glyphWidth = getGlyphWidth();
		for ( int i = 0; i < len; i++ ) {
			bool isTab = ( line[i] == '\t' );
			Float advance = isTab ? Text::tabAdvance( glyphWidth, mTabWidth,
													  mTabStops ? xOffset : std::optional<Float>{} )
								  : glyphWidth;
			if ( xOffset >= x ) {
				auto col = xOffset - x > advance * 0.5f ? eemax<Int64>( 0, i - 1 ) : i;
				return visibleIndexRange.start().column() + col;
			} else if ( isTab && ( xOffset + advance > x ) ) {
				auto col =
					x - xOffset > ( advance * 0.5f ) ? eemin<Int64>( i + 1, line.size() - 1 ) : i;
				return visibleIndexRange.start().column() + col;
			}
			xOffset += advance;
		}
		return visibleIndexRange.start().column() + static_cast<Int64>( line.size() ) - 1;
	}

	if ( !isMonospaceLine( pos.line() ) ) {
		return Text::findCharacterFromPos(
			Vector2i( x, 0 ), true, mFont, getCharacterSize(), mDoc->line( pos.line() ).getText(),
			mFontStyleConfig.Style, mTabWidth, 0.f, mTabStops ? 0 : std::optional<Float>(),
			mDoc->line( pos.line() ).getTextHints() | getWidgetTextDrawHints(), mTextDirection );
	}

	const String& line = mDoc->line( pos.line() ).getText();
	Int64 len = line.length();
	Float glyphWidth = getGlyphWidth();