kicad/include/eda_text.h

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2004-2022 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#ifndef EDA_TEXT_H_
#define EDA_TEXT_H_

#include <memory>
#include <vector>

#include <outline_mode.h>
#include <eda_rect.h>
#include <font/glyph.h>
#include <font/text_attributes.h>

class OUTPUTFORMATTER;
class SHAPE_COMPOUND;
class SHAPE_POLY_SET;
class wxFindReplaceData;


namespace KIGFX
{
    class RENDER_SETTINGS;
    class COLOR4D;
}

using KIGFX::RENDER_SETTINGS;
using KIGFX::COLOR4D;

// part of the kicad_plugin.h family of defines.
// See kicad_plugin.h for the choice of the value
// When set when calling  EDA_TEXT::Format, disable writing the "hide" keyword in save file
#define CTL_OMIT_HIDE               (1 << 6)


/**
 * This is the "default-of-the-default" hardcoded text size; individual
 * application define their own default policy starting with this
 * (usually with a user option or project).
 */
#define DEFAULT_SIZE_TEXT   50     // default text height (in mils, i.e. 1/1000")
#define DIM_ANCRE_TEXTE     2      // Anchor size for text


/**
 * A mix-in class (via multiple inheritance) that handles texts such as labels, parts,
 * components, or footprints.  Because it's a mix-in class, care is used to provide
 * function names (accessors) that to not collide with function names likely to be seen
 * in the combined derived classes.
 */
class EDA_TEXT
{
public:
    EDA_TEXT( const wxString& text = wxEmptyString );

    EDA_TEXT( const EDA_TEXT& aText );

    virtual ~EDA_TEXT();

    EDA_TEXT& operator=( const EDA_TEXT& aItem );

    /**
     * Return the string associated with the text object.
     *
     * @return a const wxString reference containing the string of the item.
     */
    virtual const wxString& GetText() const { return m_text; }

    /**
     * Returns a shortened version (max 54 characters) of the shown text
     */
    wxString ShortenedText() const;

    /**
     * Return the string actually shown after processing of the base text.
     *
     * @param aDepth is used to prevent infinite recursions and loops when expanding
     * text variables.
     */
    virtual wxString GetShownText( int aDepth = 0 ) const { return m_shown_text; }

    /**
     * Returns a shortened version (max 36 characters) of the shown text
     */
    wxString ShortenedShownText() const;

    /**
     * Indicates the ShownText has text var references which need to be processed.
     */
    bool HasTextVars() const { return m_shown_text_has_text_var_refs; }

    virtual void SetText( const wxString& aText );

    /**
     * The TextThickness is that set by the user.  The EffectiveTextPenWidth also factors
     * in bold text and thickness clamping.
     */
    void SetTextThickness( int aWidth );
    int GetTextThickness() const                { return m_attributes.m_StrokeWidth; };

    /**
     * The EffectiveTextPenWidth uses the text thickness if > 1 or aDefaultWidth.
     */
    int GetEffectiveTextPenWidth( int aDefaultWidth = 0 ) const;

    virtual void SetTextAngle( const EDA_ANGLE& aAngle );
    const EDA_ANGLE& GetTextAngle() const       { return m_attributes.m_Angle; }

    void SetItalic( bool aItalic );
    bool IsItalic() const                       { return m_attributes.m_Italic; }

    void SetBold( bool aBold );
    bool IsBold() const                         { return m_attributes.m_Bold; }

    virtual void SetVisible( bool aVisible );
    virtual bool IsVisible() const              { return m_attributes.m_Visible; }

    void SetMirrored( bool isMirrored );
    bool IsMirrored() const                     { return m_attributes.m_Mirrored; }

    /**
     * @param aAllow true if ok to use multiline option, false if ok to use only single line
     *               text.  (Single line is faster in calculations than multiline.)
     */
    void SetMultilineAllowed( bool aAllow );
    bool IsMultilineAllowed() const             { return m_attributes.m_Multiline; }

    void SetHorizJustify( GR_TEXT_H_ALIGN_T aType );
    GR_TEXT_H_ALIGN_T GetHorizJustify() const   { return m_attributes.m_Halign; };

    void SetVertJustify( GR_TEXT_V_ALIGN_T aType );
    GR_TEXT_V_ALIGN_T GetVertJustify() const    { return m_attributes.m_Valign; };

    void SetKeepUpright( bool aKeepUpright );
    bool IsKeepUpright() const                  { return m_attributes.m_KeepUpright; }

    /**
     * Set the text attributes from another instance.
     */
    void SetAttributes( const EDA_TEXT& aSrc );

    /**
     * Swap the text attributes of the two involved instances.
     */
    void SwapAttributes( EDA_TEXT& aTradingPartner );

    void SwapText( EDA_TEXT& aTradingPartner );

    void CopyText( const EDA_TEXT& aSrc );

    void SetAttributes( const TEXT_ATTRIBUTES& aTextAttrs ) { m_attributes = aTextAttrs; }
    const TEXT_ATTRIBUTES& GetAttributes() const { return m_attributes; }

    /**
     * Helper function used in search and replace dialog.
     *
     * Perform a text replace using the find and replace criteria in \a aSearchData.
     *
     * @param aSearchData A reference to a wxFindReplaceData object containing the
     *                    search and replace criteria.
     * @return True if the text item was modified, otherwise false.
     */
    bool Replace( const wxFindReplaceData& aSearchData );

    bool IsDefaultFormatting() const;

    void SetFont( KIFONT::FONT* aFont );
    KIFONT::FONT* GetFont() const               { return m_attributes.m_Font; }

    wxString GetFontName() const;

    void SetLineSpacing( double aLineSpacing );
    double GetLineSpacing() const               { return m_attributes.m_LineSpacing; }

    void SetTextSize( const VECTOR2I& aNewSize );
    VECTOR2I GetTextSize() const                { return m_attributes.m_Size; }

    void SetTextWidth( int aWidth );
    int GetTextWidth() const                    { return m_attributes.m_Size.x; }

    void SetTextHeight( int aHeight );
    int GetTextHeight() const                   { return m_attributes.m_Size.y; }

    void SetTextColor( const COLOR4D& aColor )  { m_attributes.m_Color = aColor; }
    COLOR4D GetTextColor() const                { return m_attributes.m_Color; }

    void SetTextPos( const VECTOR2I& aPoint );
    const VECTOR2I& GetTextPos() const          { return m_pos; }

    void SetTextX( int aX );
    void SetTextY( int aY );

    void Offset( const VECTOR2I& aOffset );

    void Empty();

    static GR_TEXT_H_ALIGN_T MapHorizJustify( int aHorizJustify );
    static GR_TEXT_V_ALIGN_T MapVertJustify( int aVertJustify );

    /**
     * Print this text object to the device context \a aDC.
     *
     * @param aDC the current Device Context.
     * @param aOffset draw offset (usually (0,0)).
     * @param aColor text color.
     * @param aDisplay_mode #FILLED or #SKETCH.
     */
    void Print( const RENDER_SETTINGS* aSettings, const VECTOR2I& aOffset,
                const COLOR4D& aColor, OUTLINE_MODE aDisplay_mode = FILLED );

    /**
     * Convert the text bounding box to a rectangular polygon depending on the text
     * orientation, the bounding box is not always horizontal or vertical
     *
     * Used in filling zones calculations
     * Circles and arcs are approximated by segments
     *
     * @param aCornerBuffer a buffer to store the polygon.
     * @param aClearanceValue the clearance around the text bounding box
     * to the real clearance value (usually near from 1.0).
     */
    void TransformBoundingBoxWithClearanceToPolygon( SHAPE_POLY_SET* aCornerBuffer,
                                                     int aClearanceValue ) const;

    /**
     * build a list of segments (SHAPE_SEGMENT) to describe a text shape.
     * @param aTriangulate: true to build also the triangulation of each shape
     * @param aUseTextRotation: true to use the actual text draw rotation.
     * false to build a list of shape for a not rotated text ("native" shapes).
     */
    std::shared_ptr<SHAPE_COMPOUND> GetEffectiveTextShape( bool aTriangulate = true,
                                                           bool aUseTextRotation = true ) const;

    /**
     * Test if \a aPoint is within the bounds of this object.
     *
     * @param aPoint A VECTOR2I to test.
     * @param aAccuracy Amount to inflate the bounding box.
     * @return true if a hit, else false.
     */
    virtual bool TextHitTest( const VECTOR2I& aPoint, int aAccuracy = 0 ) const;

    /**
     * Test if object bounding box is contained within or intersects \a aRect.
     *
     * @param aRect Rect to test against.
     * @param aContains Test for containment instead of intersection if true.
     * @param aAccuracy Amount to inflate the bounding box.
     * @return true if a hit, else false.
     */
    virtual bool TextHitTest( const EDA_RECT& aRect, bool aContains, int aAccuracy = 0 ) const;

    /**
     * Useful in multiline texts to calculate the full text or a line area (for zones filling,
     * locate functions....)
     *
     * @param aLine The line of text to consider.  Pass -1 for all lines.
     * @param aInvertY Invert the Y axis when calculating bounding box.
     * @return the rect containing the line of text (i.e. the position and the size of one line)
     *         this rectangle is calculated for 0 orient text.
     *         If orientation is not 0 the rect must be rotated to match the physical area
     */
    EDA_RECT GetTextBox( int aLine = -1, bool aInvertY = false ) const;

    /**
     * Return the distance between two lines of text.
     *
     * Calculates the distance (pitch) between two lines of text.  This distance includes the
     * interline distance plus room for characters like j, {, and [.  It also used for single
     * line text, to calculate the text bounding box.
     */
    int GetInterline() const;

    /**
     * @return a wxString with the style name( Normal, Italic, Bold, Bold+Italic).
     */
    wxString GetTextStyleName() const;

    /**
     * Populate \a aPositions with the position of each line of a multiline text, according
     * to the vertical justification and the rotation of the whole text.
     *
     * @param aPositions is the list to populate by the VECTOR2I positions.
     * @param aLineCount is the number of lines (not recalculated here for efficiency reasons.
     */
    void GetLinePositions( std::vector<VECTOR2I>& aPositions, int aLineCount ) const;

    /**
     * Output the object to \a aFormatter in s-expression form.
     *
     * @param aFormatter The #OUTPUTFORMATTER object to write to.
     * @param aNestLevel The indentation next level.
     * @param aControlBits The control bit definition for object specific formatting.
     * @throw IO_ERROR on write error.
     */
    virtual void Format( OUTPUTFORMATTER* aFormatter, int aNestLevel, int aControlBits ) const;

    virtual KIFONT::FONT* GetDrawFont() const;
    virtual EDA_ANGLE GetDrawRotation() const               { return GetTextAngle(); }
    virtual VECTOR2I GetDrawPos() const                     { return GetTextPos(); }

    virtual void ClearRenderCache();
    virtual void ClearBoundingBoxCache();

    std::vector<std::unique_ptr<KIFONT::GLYPH>>*
    GetRenderCache( const wxString& forResolvedText, const VECTOR2I& aOffset = { 0, 0 } ) const;

    // Support for reading the cache from disk.
    void SetupRenderCache( const wxString& aResolvedText, const EDA_ANGLE& aAngle );
    void AddRenderCacheGlyph( const SHAPE_POLY_SET& aPoly );

    int Compare( const EDA_TEXT* aOther ) const;

private:
    void cacheShownText();

    /**
     * Print each line of this EDA_TEXT.
     *
     * @param aOffset draw offset (usually (0,0)).
     * @param aColor text color.
     * @param aFillMode FILLED or SKETCH
     * @param aText the single line of text to draw.
     * @param aPos the position of this line ).
     */
    void printOneLineOfText( const RENDER_SETTINGS* aSettings, const VECTOR2I& aOffset,
                             const COLOR4D& aColor, OUTLINE_MODE aFillMode, const wxString& aText,
                             const VECTOR2I& aPos );

    wxString         m_text;
    wxString         m_shown_text;           // Cache of unescaped text for efficient access
    bool             m_shown_text_has_text_var_refs;

    mutable wxString                                    m_render_cache_text;
    mutable EDA_ANGLE                                   m_render_cache_angle;
    mutable VECTOR2I                                    m_render_cache_offset;
    mutable std::vector<std::unique_ptr<KIFONT::GLYPH>> m_render_cache;

    mutable bool     m_bounding_box_cache_valid;
    mutable VECTOR2I m_bounding_box_cache_pos;
    mutable int      m_bounding_box_cache_line;
    mutable bool     m_bounding_box_cache_inverted;
    mutable EDA_RECT m_bounding_box_cache;

    TEXT_ATTRIBUTES  m_attributes;
    VECTOR2I         m_pos;
};


#endif   //  EDA_TEXT_H_