/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
 * Copyright (C) 2008-2011 Wayne Stambaugh <stambaughw@verizon.net>
 * Copyright (C) 2004-2011 KiCad Developers, see change_log.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
 */

/**
 * @file sch_field.cpp
 * @brief Implementation of the SCH_FIELD class.
 */

/* Fields are texts attached to a component, having a special meaning
 * Fields 0 and 1 are very important: reference and value
 * Field 2 is used as default footprint name.
 * Field 3 is reserved (not currently used
 * Fields 4 and more are user fields.
 * They can be renamed and can appear in reports
 */

#include "fctsys.h"
#include "class_drawpanel.h"
#include "base_struct.h"
#include "gr_basic.h"
#include "drawtxt.h"
#include "macros.h"
#include "trigo.h"
#include "wxEeschemaStruct.h"
#include "plot_common.h"

#include "general.h"
#include "protos.h"
#include "class_library.h"
#include "sch_component.h"
#include "sch_field.h"
#include "kicad_string.h"


SCH_FIELD::SCH_FIELD( const wxPoint& aPos, int aFieldId, SCH_COMPONENT* aParent, wxString aName ) :
    SCH_ITEM( aParent, SCH_FIELD_T ),
    EDA_TEXT()
{
    m_Pos     = aPos;
    m_FieldId = aFieldId;
    m_Attributs    = TEXT_NO_VISIBLE;
    m_Name = aName;

    SetLayer( LAYER_FIELDS );
}


SCH_FIELD::SCH_FIELD( const SCH_FIELD& aField ) :
    SCH_ITEM( aField ),
    EDA_TEXT( aField )
{
    m_FieldId = aField.m_FieldId;
    m_Name = aField.m_Name;
}


SCH_FIELD::~SCH_FIELD()
{
}


EDA_ITEM* SCH_FIELD::doClone() const
{
    return new SCH_FIELD( *this );
}


wxString SCH_FIELD::GetText() const
{
    wxString text = m_Text;

    /* For more than one part per package, we must add the part selection
     * A, B, ... or 1, 2, .. to the reference. */
    if( m_FieldId == REFERENCE )
    {
        SCH_COMPONENT* component = (SCH_COMPONENT*) m_Parent;

        wxCHECK_MSG( component != NULL, text,
                     wxT( "No component associated with field" ) + text );
        if( component->GetPartCount() > 1 )
            text << LIB_COMPONENT::ReturnSubReference( component->GetUnit() );
    }

    return text;
}


int SCH_FIELD::GetPenSize() const
{
    int pensize = m_Thickness;

    if( pensize == 0 )   // Use default values for pen size
    {
        if( m_Bold  )
            pensize = GetPenSizeForBold( m_Size.x );
        else
            pensize = g_DrawDefaultLineThickness;
    }

    // Clip pen size for small texts:
    pensize = Clamp_Text_PenSize( pensize, m_Size, m_Bold );
    return pensize;
}


void SCH_FIELD::Draw( EDA_DRAW_PANEL* panel, wxDC* DC,
                      const wxPoint& offset, int DrawMode, int Color )
{
    int            orient;
    EDA_Colors     color;
    wxPoint        textpos;
    SCH_COMPONENT* parentComponent = (SCH_COMPONENT*) m_Parent;
    int            LineWidth = m_Thickness;

    if( LineWidth == 0 )   // Use default values for pen size
    {
        if( m_Bold  )
            LineWidth = GetPenSizeForBold( m_Size.x );
        else
            LineWidth = g_DrawDefaultLineThickness;
    }


    // Clip pen size for small texts:
    LineWidth = Clamp_Text_PenSize( LineWidth, m_Size, m_Bold );

    if( ( m_Attributs & TEXT_NO_VISIBLE ) || IsVoid() )
        return;

    GRSetDrawMode( DC, DrawMode );

    /* Calculate the text orientation, according to the component
     * orientation/mirror */
    orient = m_Orient;

    if( parentComponent->GetTransform().y1 )  // Rotate component 90 degrees.
    {
        if( orient == TEXT_ORIENT_HORIZ )
            orient = TEXT_ORIENT_VERT;
        else
            orient = TEXT_ORIENT_HORIZ;
    }

    /* Calculate the text justification, according to the component
     * orientation/mirror this is a bit complicated due to cumulative
     * calculations:
     * - numerous cases (mirrored or not, rotation)
     * - the DrawGraphicText function recalculate also H and H justifications
     *      according to the text orientation.
     * - When a component is mirrored, the text is not mirrored and
     *   justifications are complicated to calculate
     * so the more easily way is to use no justifications ( Centered text )
     * and use GetBoundaryBox to know the text coordinate considered as centered
     */
    EDA_RECT boundaryBox = GetBoundingBox();
    textpos = boundaryBox.Centre();

    if( m_FieldId == REFERENCE )
        color = ReturnLayerColor( LAYER_REFERENCEPART );
    else if( m_FieldId == VALUE )
        color = ReturnLayerColor( LAYER_VALUEPART );
    else
        color = ReturnLayerColor( LAYER_FIELDS );

    DrawGraphicText( panel, DC, textpos, color, GetText(), orient, m_Size,
                     GR_TEXT_HJUSTIFY_CENTER, GR_TEXT_VJUSTIFY_CENTER,
                     LineWidth, m_Italic, m_Bold );

    /* Enable this to draw the bounding box around the text field to validate
     * the bounding box calculations.
     */
#if 0

    // Draw boundary box:
    GRRect( &panel->m_ClipBox, DC, boundaryBox, 0, BROWN );

    // Draw the text anchor point

    /* Calculate the text position, according to the component
     * orientation/mirror */
    textpos  = m_Pos - parentComponent->GetPosition();
    textpos  = parentComponent->GetScreenCoord( textpos );
    textpos += parentComponent->GetPosition();
    const int len = 10;
    GRLine( &panel->m_ClipBox, DC,
            textpos.x - len, textpos.y, textpos.x + len, textpos.y, 0, BLUE );
    GRLine( &panel->m_ClipBox, DC,
            textpos.x, textpos.y - len, textpos.x, textpos.y + len, 0, BLUE );
#endif
}


void SCH_FIELD::ImportValues( const LIB_FIELD& aSource )
{
    m_Orient    = aSource.m_Orient;
    m_Size      = aSource.m_Size;
    m_HJustify  = aSource.m_HJustify;
    m_VJustify  = aSource.m_VJustify;
    m_Italic    = aSource.m_Italic;
    m_Bold      = aSource.m_Bold;
    m_Thickness = aSource.m_Thickness;
    m_Attributs = aSource.m_Attributs;
    m_Mirror    = aSource.m_Mirror;
}


void SCH_FIELD::SwapData( SCH_ITEM* aItem )
{
    wxCHECK_RET( (aItem != NULL) && (aItem->Type() == SCH_FIELD_T),
                 wxT( "Cannot swap field data with invalid item." ) );

    SCH_FIELD* item = (SCH_FIELD*) aItem;

    EXCHG( m_Text, item->m_Text );
    EXCHG( m_Layer, item->m_Layer );
    EXCHG( m_Pos, item->m_Pos );
    EXCHG( m_Size, item->m_Size );
    EXCHG( m_Thickness, item->m_Thickness );
    EXCHG( m_Orient, item->m_Orient );
    EXCHG( m_Mirror, item->m_Mirror );
    EXCHG( m_Attributs, item->m_Attributs );
    EXCHG( m_Italic, item->m_Italic );
    EXCHG( m_Bold, item->m_Bold );
    EXCHG( m_HJustify, item->m_HJustify );
    EXCHG( m_VJustify, item->m_VJustify );
}


EDA_RECT SCH_FIELD::GetBoundingBox() const
{
    SCH_COMPONENT* parentComponent = (SCH_COMPONENT*) m_Parent;
    int linewidth = ( m_Thickness == 0 ) ? g_DrawDefaultLineThickness : m_Thickness;

    // We must pass the effective text thickness to GetTextBox
    // when calculating the bounding box
    linewidth = Clamp_Text_PenSize( linewidth, m_Size, m_Bold );

    // Calculate the text bounding box:
    EDA_RECT rect = GetTextBox( -1, linewidth );

    // Calculate the bounding box position relative to the component:
    wxPoint origin = parentComponent->GetPosition();
    wxPoint pos = m_Pos - origin;
    wxPoint begin = rect.GetOrigin() - origin;
    wxPoint end = rect.GetEnd() - origin;
    RotatePoint( &begin, pos, m_Orient );
    RotatePoint( &end, pos, m_Orient );
    // Due to the Y axis direction, we must mirror the bounding box,
    // relative to the text position:
    begin.y -= pos.y;
    end.y -= pos.y;
    NEGATE( begin.y );
    NEGATE( end.y );
    begin.y += pos.y;
    end.y += pos.y;
    // Now, apply the component transform (mirror/rot)
    begin = parentComponent->GetTransform().TransformCoordinate( begin );
    end = parentComponent->GetTransform().TransformCoordinate( end );
    rect.SetOrigin( begin);
    rect.SetEnd( end);
    rect.Move( origin );
    rect.Normalize();
    return rect;
}


bool SCH_FIELD::Save( FILE* aFile ) const
{
    char hjustify = 'C';

    if( m_HJustify == GR_TEXT_HJUSTIFY_LEFT )
        hjustify = 'L';
    else if( m_HJustify == GR_TEXT_HJUSTIFY_RIGHT )
        hjustify = 'R';

    char vjustify = 'C';

    if( m_VJustify == GR_TEXT_VJUSTIFY_BOTTOM )
        vjustify = 'B';
    else if( m_VJustify == GR_TEXT_VJUSTIFY_TOP )
        vjustify = 'T';

    if( fprintf( aFile, "F %d %s %c %-3d %-3d %-3d %4.4X %c %c%c%c",
                 m_FieldId,
                 EscapedUTF8( m_Text ).c_str(),     // wraps in quotes too
                 m_Orient == TEXT_ORIENT_HORIZ ? 'H' : 'V',
                 m_Pos.x, m_Pos.y,
                 m_Size.x,
                 m_Attributs,
                 hjustify, vjustify,
                 m_Italic ? 'I' : 'N',
                 m_Bold ? 'B' : 'N' ) == EOF )
    {
        return false;
    }

    // Save field name, if the name is user definable
    if( m_FieldId >= FIELD1 )
    {
        if( fprintf( aFile, " %s", EscapedUTF8( m_Name ).c_str() ) == EOF )
        {
            return false;
        }
    }

    if( fprintf( aFile, "\n" ) == EOF )
    {
        return false;
    }

    return true;
}


void SCH_FIELD::Place( SCH_EDIT_FRAME* frame, wxDC* DC )
{
    frame->DrawPanel->SetMouseCapture( NULL, NULL );

    SCH_COMPONENT* component = (SCH_COMPONENT*) GetParent();

    // save old cmp in undo list
    frame->SaveUndoItemInUndoList( component );

    Draw( frame->DrawPanel, DC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
    ClearFlags();
    frame->GetScreen()->SetCurItem( NULL );
    frame->OnModify();
}


bool SCH_FIELD::Matches( wxFindReplaceData& aSearchData, void* aAuxData, wxPoint * aFindLocation )
{
    bool match;

    match = SCH_ITEM::Matches( GetText(), aSearchData );

    if( match )
    {
        if( aFindLocation )
            *aFindLocation = GetBoundingBox().Centre();

        return true;
    }

    return false;
}


void SCH_FIELD::Rotate( wxPoint rotationPoint )
{
    RotatePoint( &m_Pos, rotationPoint, 900 );
}


wxString SCH_FIELD::GetSelectMenuText() const
{
    wxString tmp;
    tmp.Printf( _( "Field %s" ), GetChars( GetName() ) );

    return tmp;
}


wxString SCH_FIELD::GetName() const
{
    if( !m_Name.IsEmpty() )
        return m_Name;
    else
        return TEMPLATE_FIELDNAME::GetDefaultFieldName( m_FieldId );
}


BITMAP_DEF SCH_FIELD::GetMenuImage() const
{
    if( m_FieldId == REFERENCE )
        return edit_comp_ref_xpm;

    if( m_FieldId == VALUE )
        return edit_comp_value_xpm;

    if( m_FieldId == FOOTPRINT )
        return edit_comp_footprint_xpm;

    return edit_text_xpm;
}


bool SCH_FIELD::doHitTest( const wxPoint& aPoint, int aAccuracy ) const
{
    // Do not hit test hidden or empty fields.
    if( !IsVisible() || IsVoid() )
        return false;

    EDA_RECT rect = GetBoundingBox();

    rect.Inflate( aAccuracy );

    return rect.Contains( aPoint );
}


bool SCH_FIELD::doHitTest( const EDA_RECT& aRect, bool aContained, int aAccuracy ) const
{
    // Do not hit test hidden fields.
    if( !IsVisible() || IsVoid() )
        return false;

    EDA_RECT rect = aRect;

    rect.Inflate( aAccuracy );

    if( aContained )
        return rect.Contains( GetBoundingBox() );

    return rect.Intersects( GetBoundingBox() );
}


/* Plot field text.
 * Input:
 * DrawLibItem: pointer to the component
 * FieldNumber: Number Field
 * IsMulti: true flag if there are several parts per package.
 * Only useful for the field to add a reference to this one
 * The identification from (A, B ...)
 * DrawMode: trace mode
 */
void SCH_FIELD::doPlot( PLOTTER* aPlotter )
{
    SCH_COMPONENT* parent = ( SCH_COMPONENT* ) GetParent();

    wxCHECK_RET( parent != NULL && parent->Type() == SCH_COMPONENT_T,
                 wxT( "Cannot plot field with invalid parent." ) );

    EDA_Colors color = UNSPECIFIED_COLOR;

    color = ReturnLayerColor( GetLayer() );

    if( m_Attributs & TEXT_NO_VISIBLE )
        return;

    if( IsVoid() )
        return;

    /* Calculate the text orientation, according to the component
     * orientation/mirror */
    int orient = m_Orient;

    if( parent->GetTransform().y1 )  // Rotate component 90 deg.
    {
        if( orient == TEXT_ORIENT_HORIZ )
            orient = TEXT_ORIENT_VERT;
        else
            orient = TEXT_ORIENT_HORIZ;
    }

    /* Calculate the text justification, according to the component
     * orientation/mirror
     * this is a bit complicated due to cumulative calculations:
     * - numerous cases (mirrored or not, rotation)
     * - the DrawGraphicText function recalculate also H and H justifications
     *      according to the text orientation.
     * - When a component is mirrored, the text is not mirrored and
     *   justifications are complicated to calculate
     * so the more easily way is to use no justifications ( Centered text )
     * and use GetBoundaryBox to know the text coordinate considered as centered
     */
    EDA_RECT BoundaryBox = GetBoundingBox();
    GRTextHorizJustifyType hjustify = GR_TEXT_HJUSTIFY_CENTER;
    GRTextVertJustifyType vjustify  = GR_TEXT_VJUSTIFY_CENTER;
    wxPoint  textpos = BoundaryBox.Centre();

    int      thickness = GetPenSize();

    if( (parent->GetPartCount() <= 1) || (m_FieldId != REFERENCE) )
    {
        aPlotter->text( textpos, color, m_Text, orient, m_Size, hjustify, vjustify,
                        thickness, m_Italic, m_Bold );
    }
    else    /* We plot the reference, for a multiple parts per package */
    {
        /* Adding A, B ... to the reference */
        wxString Text = m_Text + LIB_COMPONENT::ReturnSubReference( parent->GetUnit() );

        aPlotter->text( textpos, color, Text, orient, m_Size, hjustify, vjustify,
                        thickness, m_Italic, m_Bold );
    }
}


void SCH_FIELD::doSetPosition( const wxPoint& aPosition )
{
    SCH_COMPONENT* component = (SCH_COMPONENT*) GetParent();

    wxPoint pos = ( (SCH_COMPONENT*) GetParent() )->GetPosition();

    // Actual positions are calculated by the rotation/mirror transform of the
    // parent component of the field.  The inverse transfrom is used to calculate
    // the position relative to the parent component.
    wxPoint pt = aPosition - pos;

    m_Pos = pos + component->GetTransform().InverseTransform().TransformCoordinate( pt );
}


wxPoint SCH_FIELD::doGetPosition() const
{

    SCH_COMPONENT* component = (SCH_COMPONENT*) GetParent();

    wxPoint pos = m_Pos - component->GetPosition();

    return component->GetTransform().TransformCoordinate( pos ) + component->GetPosition();
}