485 lines
15 KiB
C++
485 lines
15 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (C) 2021 Ola Rinta-Koski
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* Copyright (C) 2021-2022 Kicad Developers, see AUTHORS.txt for contributors.
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*
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* Font abstract base class
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <wx/font.h>
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#include <string_utils.h>
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#include <gal/graphics_abstraction_layer.h>
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#include <font/stroke_font.h>
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#include <font/outline_font.h>
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#include <trigo.h>
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#include <markup_parser.h>
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// The "official" name of the building Kicad stroke font (always existing)
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#include <font/kicad_font_name.h>
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// markup_parser.h includes pegtl.hpp which includes windows.h... which leaks #define DrawText
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#undef DrawText
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using namespace KIFONT;
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FONT* FONT::s_defaultFont = nullptr;
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std::map< std::tuple<wxString, bool, bool>, FONT*> FONT::s_fontMap;
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FONT::FONT()
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{
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}
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const wxString& FONT::Name() const
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{
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return m_fontName;
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}
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FONT* FONT::getDefaultFont()
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{
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if( !s_defaultFont )
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s_defaultFont = STROKE_FONT::LoadFont( wxEmptyString );
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return s_defaultFont;
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}
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FONT* FONT::GetFont( const wxString& aFontName, bool aBold, bool aItalic )
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{
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if( aFontName.empty() || aFontName.StartsWith( KICAD_FONT_NAME ) )
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return getDefaultFont();
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std::tuple<wxString, bool, bool> key = { aFontName, aBold, aItalic };
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FONT* font = s_fontMap[key];
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if( !font )
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font = OUTLINE_FONT::LoadFont( aFontName, aBold, aItalic );
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if( !font )
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font = getDefaultFont();
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s_fontMap[key] = font;
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return font;
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}
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bool FONT::IsStroke( const wxString& aFontName )
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{
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// This would need a more complex implementation if we ever support more stroke fonts
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// than the KiCad Font.
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return aFontName == _( "Default Font" ) || aFontName == KICAD_FONT_NAME;
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}
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void FONT::getLinePositions( const wxString& aText, const VECTOR2I& aPosition,
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wxArrayString& aTextLines, std::vector<VECTOR2I>& aPositions,
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std::vector<VECTOR2I>& aExtents, const TEXT_ATTRIBUTES& aAttrs ) const
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{
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wxStringSplit( aText, aTextLines, '\n' );
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int lineCount = aTextLines.Count();
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aPositions.reserve( lineCount );
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int interline = GetInterline( aAttrs.m_Size.y, aAttrs.m_LineSpacing );
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int height = 0;
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for( int i = 0; i < lineCount; i++ )
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{
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VECTOR2I pos( aPosition.x, aPosition.y + i * interline );
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VECTOR2I end = boundingBoxSingleLine( nullptr, aTextLines[i], pos, aAttrs.m_Size,
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aAttrs.m_Italic );
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VECTOR2I bBox( end - pos );
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aExtents.push_back( bBox );
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if( i == 0 )
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height += aAttrs.m_Size.y;
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else
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height += interline;
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}
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VECTOR2I offset( 0, 0 );
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offset.y += aAttrs.m_Size.y;
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switch( aAttrs.m_Valign )
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{
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case GR_TEXT_V_ALIGN_TOP: break;
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case GR_TEXT_V_ALIGN_CENTER: offset.y -= height / 2; break;
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case GR_TEXT_V_ALIGN_BOTTOM: offset.y -= height; break;
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}
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for( int i = 0; i < lineCount; i++ )
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{
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VECTOR2I lineSize = aExtents.at( i );
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VECTOR2I lineOffset( offset );
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lineOffset.y += i * interline;
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switch( aAttrs.m_Halign )
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{
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case GR_TEXT_H_ALIGN_LEFT: break;
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case GR_TEXT_H_ALIGN_CENTER: lineOffset.x = -lineSize.x / 2; break;
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case GR_TEXT_H_ALIGN_RIGHT: lineOffset.x = -lineSize.x; break;
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}
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aPositions.push_back( aPosition + lineOffset );
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}
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}
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/**
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* Draw a string.
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*
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* @param aGal
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* @param aText is the text to be drawn.
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* @param aPosition is the text object position in world coordinates.
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* @param aCursor is the current text position (for multiple text blocks within a single text
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* object, such as a run of superscript characters)
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* @param aAttrs are the styling attributes of the text, including its rotation
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*/
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void FONT::Draw( KIGFX::GAL* aGal, const wxString& aText, const VECTOR2I& aPosition,
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const VECTOR2I& aCursor, const TEXT_ATTRIBUTES& aAttrs ) const
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{
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if( !aGal || aText.empty() )
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return;
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VECTOR2I position( aPosition - aCursor );
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// Split multiline strings into separate ones and draw them line by line
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wxArrayString strings_list;
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std::vector<VECTOR2I> positions;
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std::vector<VECTOR2I> extents;
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getLinePositions( aText, position, strings_list, positions, extents, aAttrs );
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aGal->SetLineWidth( aAttrs.m_StrokeWidth );
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for( size_t i = 0; i < strings_list.GetCount(); i++ )
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{
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drawSingleLineText( aGal, nullptr, strings_list[i], positions[i], aAttrs.m_Size,
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aAttrs.m_Angle, aAttrs.m_Mirrored, aPosition, aAttrs.m_Italic );
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}
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}
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/**
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* @return position of cursor for drawing next substring
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*/
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VECTOR2I drawMarkup( BOX2I* aBoundingBox, std::vector<std::unique_ptr<GLYPH>>* aGlyphs,
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const std::unique_ptr<MARKUP::NODE>& aNode, const VECTOR2I& aPosition,
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const KIFONT::FONT* aFont, const VECTOR2I& aSize, const EDA_ANGLE& aAngle,
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bool aMirror, const VECTOR2I& aOrigin, TEXT_STYLE_FLAGS aTextStyle )
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{
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VECTOR2I nextPosition = aPosition;
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TEXT_STYLE_FLAGS textStyle = aTextStyle;
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if( !aNode->is_root() )
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{
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if( aNode->isSubscript() )
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textStyle = TEXT_STYLE::SUBSCRIPT;
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else if( aNode->isSuperscript() )
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textStyle = TEXT_STYLE::SUPERSCRIPT;
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if( aNode->isOverbar() )
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textStyle |= TEXT_STYLE::OVERBAR;
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if( aNode->has_content() )
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{
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std::string txt = aNode->string();
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BOX2I bbox;
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nextPosition = aFont->GetTextAsGlyphs( &bbox, aGlyphs, txt, aSize, aPosition, aAngle,
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aMirror, aOrigin, textStyle );
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if( aBoundingBox )
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aBoundingBox->Merge( bbox );
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}
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}
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for( const std::unique_ptr<MARKUP::NODE>& child : aNode->children )
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{
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nextPosition = drawMarkup( aBoundingBox, aGlyphs, child, nextPosition, aFont, aSize,
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aAngle, aMirror, aOrigin, textStyle );
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}
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return nextPosition;
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}
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VECTOR2I FONT::drawMarkup( BOX2I* aBoundingBox, std::vector<std::unique_ptr<GLYPH>>* aGlyphs,
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const wxString& aText, const VECTOR2I& aPosition, const VECTOR2I& aSize,
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const EDA_ANGLE& aAngle, bool aMirror, const VECTOR2I& aOrigin,
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TEXT_STYLE_FLAGS aTextStyle ) const
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{
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MARKUP::MARKUP_PARSER markupParser( aText.ToStdString() );
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std::unique_ptr<MARKUP::NODE> root = markupParser.Parse();
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return ::drawMarkup( aBoundingBox, aGlyphs, root, aPosition, this, aSize, aAngle, aMirror,
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aOrigin, aTextStyle );
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}
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void FONT::drawSingleLineText( KIGFX::GAL* aGal, BOX2I* aBoundingBox, const wxString& aText,
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const VECTOR2I& aPosition, const VECTOR2I& aSize,
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const EDA_ANGLE& aAngle, bool aMirror, const VECTOR2I& aOrigin,
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bool aItalic ) const
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{
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if( !aGal )
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return;
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TEXT_STYLE_FLAGS textStyle = 0;
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if( aItalic )
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textStyle |= TEXT_STYLE::ITALIC;
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std::vector<std::unique_ptr<GLYPH>> glyphs;
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(void) drawMarkup( aBoundingBox, &glyphs, aText, aPosition, aSize, aAngle, aMirror, aOrigin,
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textStyle );
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for( const std::unique_ptr<GLYPH>& glyph : glyphs )
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aGal->DrawGlyph( *glyph.get() );
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}
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VECTOR2I FONT::StringBoundaryLimits( const wxString& aText, const VECTOR2I& aSize, int aThickness,
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bool aBold, bool aItalic ) const
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{
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// TODO do we need to parse every time - have we already parsed?
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BOX2I boundingBox;
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TEXT_STYLE_FLAGS textStyle = 0;
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if( aBold )
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textStyle |= TEXT_STYLE::BOLD;
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if( aItalic )
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textStyle |= TEXT_STYLE::ITALIC;
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(void) drawMarkup( &boundingBox, nullptr, aText, VECTOR2I(), aSize, ANGLE_0, false,
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VECTOR2I(), textStyle );
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if( IsStroke() )
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{
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// Inflate by a bit more than thickness/2 to catch diacriticals, descenders, etc.
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boundingBox.Inflate( KiROUND( aThickness * 0.75 ) );
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}
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else if( IsOutline() )
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{
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// Outline fonts have thickness built in
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}
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return boundingBox.GetSize();
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}
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VECTOR2I FONT::boundingBoxSingleLine( BOX2I* aBBox, const wxString& aText,
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const VECTOR2I& aPosition, const VECTOR2I& aSize,
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bool aItalic ) const
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{
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TEXT_STYLE_FLAGS textStyle = 0;
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if( aItalic )
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textStyle |= TEXT_STYLE::ITALIC;
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VECTOR2I extents = drawMarkup( aBBox, nullptr, aText, aPosition, aSize, ANGLE_0, false,
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VECTOR2I(), textStyle );
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return extents;
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}
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/*
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* Break marked-up text into "words". In this context, a "word" is EITHER a run of marked-up
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* text (subscript, superscript or overbar), OR a run of non-marked-up text separated by spaces.
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*/
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void wordbreakMarkup( std::vector<std::pair<wxString, int>>* aWords,
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const std::unique_ptr<MARKUP::NODE>& aNode, const KIFONT::FONT* aFont,
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const VECTOR2I& aSize, TEXT_STYLE_FLAGS aTextStyle )
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{
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TEXT_STYLE_FLAGS textStyle = aTextStyle;
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if( !aNode->is_root() )
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{
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wxChar escapeChar = 0;
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if( aNode->isSubscript() )
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{
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escapeChar = '_';
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textStyle = TEXT_STYLE::SUBSCRIPT;
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}
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else if( aNode->isSuperscript() )
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{
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escapeChar = '^';
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textStyle = TEXT_STYLE::SUPERSCRIPT;
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}
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if( aNode->isOverbar() )
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{
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escapeChar = '~';
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textStyle |= TEXT_STYLE::OVERBAR;
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}
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if( escapeChar )
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{
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wxString word = wxString::Format( "%c{", escapeChar );
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int width = 0;
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if( aNode->has_content() )
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{
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VECTOR2I next = aFont->GetTextAsGlyphs( nullptr, nullptr, aNode->string(), aSize,
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{0,0}, ANGLE_0, false, {0,0}, textStyle );
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word += aNode->string();
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width += next.x;
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}
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std::vector<std::pair<wxString, int>> childWords;
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for( const std::unique_ptr<MARKUP::NODE>& child : aNode->children )
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wordbreakMarkup( &childWords, child, aFont, aSize, textStyle );
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for( const std::pair<wxString, int>& childWord : childWords )
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{
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word += childWord.first;
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width += childWord.second;
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}
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word += "}";
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aWords->emplace_back( std::make_pair( word, width ) );
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return;
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}
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else
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{
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wxString space( wxS( " " ) );
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wxString textRun( aNode->string() );
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wxArrayString words;
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wxStringSplit( textRun, words, ' ' );
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if( textRun.EndsWith( wxS( " " ) ) )
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words.Add( wxS( " " ) );
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for( size_t ii = 0; ii < words.size(); ++ii )
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{
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int w = aFont->GetTextAsGlyphs( nullptr, nullptr, words[ii], aSize, { 0, 0 },
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ANGLE_0, false, { 0, 0 }, textStyle ).x;
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aWords->emplace_back( std::make_pair( words[ii], w ) );
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}
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}
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}
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for( const std::unique_ptr<MARKUP::NODE>& child : aNode->children )
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wordbreakMarkup( aWords, child, aFont, aSize, textStyle );
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}
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void FONT::wordbreakMarkup( std::vector<std::pair<wxString, int>>* aWords, const wxString& aText,
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const VECTOR2I& aSize, TEXT_STYLE_FLAGS aTextStyle ) const
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{
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MARKUP::MARKUP_PARSER markupParser( aText.ToStdString() );
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std::unique_ptr<MARKUP::NODE> root = markupParser.Parse();
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::wordbreakMarkup( aWords, root, this, aSize, aTextStyle );
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}
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/*
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* This is a highly simplified line-breaker. KiCad is an EDA tool, not a word processor.
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*
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* 1) It breaks only on spaces. If you type a word wider than the column width then you get
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* overflow.
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* 2) It treats runs of formatted text (superscript, subscript, overbar) as single words.
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* 3) It does not perform justification.
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*
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* The results of the linebreaking are the addition of \n in the text. It is presumed that this
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* function is called on m_shownText (or equivalent) rather than the original source text.
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*/
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void FONT::LinebreakText( wxString& aText, int aColumnWidth, const VECTOR2I& aSize, int aThickness,
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bool aBold, bool aItalic ) const
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{
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TEXT_STYLE_FLAGS textStyle = 0;
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if( aBold )
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textStyle |= TEXT_STYLE::BOLD;
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if( aItalic )
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textStyle |= TEXT_STYLE::ITALIC;
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int spaceWidth = GetTextAsGlyphs( nullptr, nullptr, wxS( " " ), aSize, VECTOR2I(), ANGLE_0,
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false, VECTOR2I(), textStyle ).x;
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wxArrayString textLines;
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wxStringSplit( aText, textLines, '\n' );
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aText = wxEmptyString;
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for( size_t ii = 0; ii < textLines.Count(); ++ii )
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{
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int lineWidth = 0;
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std::vector<std::pair<wxString, int>> words;
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wordbreakMarkup( &words, textLines[ii], aSize, textStyle );
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for( size_t jj = 0; jj < words.size(); /* advance in loop */ )
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{
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if( lineWidth == 0
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|| lineWidth + spaceWidth + words[jj].second < aColumnWidth - aThickness )
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{
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if( lineWidth > 0 )
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{
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aText += " ";
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lineWidth += spaceWidth;
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}
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}
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else if( lineWidth > 0 )
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{
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aText += '\n';
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lineWidth = 0;
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continue;
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}
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else
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{
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// TODO: Would we want to further split the words into characters when it doesn't fit
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// in the column width? For now just return the full word even if it doesn't fit
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// to avoid an infinite loop.
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}
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aText += words[jj].first;
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lineWidth += words[jj].second;
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jj++;
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}
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// Add the newlines back onto the string
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if( ii != ( textLines.Count() - 1 ) )
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aText += '\n';
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}
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}
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