/*

* Copyright (c) 2003-2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Implementation class for TextField

*

*/

#include <lafmain.h>

// LAF

// use in GetLayou and DoLayout functions

#include <aknlayoutscalable_avkon.cdl.h>  // LAF

#include "CMIDEdwin.h"

// using API for iTextFieldItem

#include "CMIDTextFieldItem.h"

#include "CMIDTextFieldEdwin.h"

// class CMIDTextFieldEdwin

CMIDTextFieldEdwin* CMIDTextFieldEdwin::NewL(TInt aConstraints,

        const TDesC& aText,

        TInt aMaxSize,

        MMIDDisplayable* aDisplayable,

        CMIDTextFieldItem* aTextFieldItem)

{

    ASSERT(aTextFieldItem); // we expect that it always exist for TextField

    CMIDTextFieldEdwin* textBox = new(ELeave)CMIDTextFieldEdwin(aConstraints, aDisplayable, aTextFieldItem);

    CleanupStack::PushL(textBox);

    textBox->ConstructL(aText,aMaxSize);

    CleanupStack::Pop(textBox);

    return textBox;

}

void CMIDTextFieldEdwin::ConstructL(const TDesC& aText,TInt aMaxSize)

{

    // just call superclass, for now

    CMIDEdwin::ConstructL(aText, aMaxSize);

}

// ----------------------------------------------------------------------------

// CMIDTextFieldEdwin::GetLayout()

// ----------------------------------------------------------------------------

TAknMultiLineTextLayout CMIDTextFieldEdwin::GetLayout(

    TRect& aRect, TInt aNumLines) const

{

    TAknMultiLineTextLayout         edwinLayout;

    TAknTextComponentLayout         textLayout;

    RArray<TAknTextComponentLayout> edwinLayoutLines;

    // leave margins first

    TAknWindowComponentLayout  textPaneLayout =

        AknLayoutScalable_Avkon::form2_midp_text_pane(

            AknLayoutScalable_Avkon::form2_midp_text_pane_ParamLimits().LastRow());

    TAknLayoutRect layRect;

    layRect.LayoutRect(aRect, textPaneLayout.LayoutLine());

    aRect = layRect.Rect();

    for (TInt i = 0; i < aNumLines; i++)

    {

        textLayout = AknLayoutScalable_Avkon::form2_mdip_text_pane_t1(i);

        TRAP_IGNORE(

            edwinLayoutLines.AppendL(textLayout));

    }

    edwinLayout = TAknTextComponentLayout::Multiline(edwinLayoutLines);

    edwinLayoutLines.Reset();

    return edwinLayout;

}

CMIDTextFieldEdwin::CMIDTextFieldEdwin(TUint aConstraints, MMIDDisplayable* aDisplayable, CMIDTextFieldItem* aTextFieldItem)

        : CMIDEdwin(aConstraints, aDisplayable, aTextFieldItem)

{

}

CMIDTextFieldEdwin::~CMIDTextFieldEdwin()

{

    // just calls superclass destructor

}

/**

 * Layouts a TextField.

 *

 * The Edwin control is laid-out in 2 steps:

 * <p>

 * Firstly, we calculate how many lines of text are formatted by

 * layout-ing the Edwin with the maximum lines of text that could be visible on screen.

 * <p>

 * Secondly, we layout the Edwin according to the number of formatted lines.

 * In case there are more lines that could fit on screen, we limit the number of displayed lines

 * to the maximum that can fit on screen.

 *

 * In case of of background formatting mode (e.g. TextLength() >= 1900),

 * the number of formatted lines is unpredictable.

 * We ensure that the number of lines shown is maximum.

 */

void CMIDTextFieldEdwin::DoLayout(const TRect& aRect)

{

    TAknMultiLineTextLayout layout;

    /** The skin text color overrides the text color in LAF. */

    TAknsQsnTextColorsIndex skinTextColor;

    if (iConstraints & MMIDTextField::EUneditable)

    { // skinning colour groups for uneditable text

        skinTextColor = EAknsCIQsnTextColorsCG53;

    }

    else

    { // skinning colour groups for editable text

        skinTextColor = EAknsCIQsnTextColorsCG8;

    }

    TRect parentRect = aRect;

    TAknLayoutScalableParameterLimits paneLimits =

        AknLayoutScalable_Avkon::form2_mdip_text_pane_t1_ParamLimits();

    TInt maxHeightInLines = paneLimits.LastRow();

    SetMaximumHeightInLines(maxHeightInLines);

    // layout edwin with the maximum number of lines first

    // to see how many number of lines will be formatted

    layout = GetLayout(parentRect, maxHeightInLines);   // changes aRect

    AknLayoutUtils::LayoutEdwin(this, parentRect, layout, skinTextColor);

    TInt numLayoutLines;

    if (!IsPartialFormatting())

    {

        // check how many lines are formatted

        // to prepare the multi line layout structure

        TInt numFormattedLines = TextLayout()->NumFormattedLines();

        if (numFormattedLines > maxHeightInLines)

        {

            numLayoutLines = maxHeightInLines; // restrict the number of visible lines

#ifdef RD_SCALABLE_UI_V2

            // set the correct scrolling rect for line by line scrolling

            // when text is longer than displayed

            SetThisScrollRect(this, parentRect, layout, numLayoutLines);

#endif // RD_SCALABLE_UI_V2

        }

        else

        {

            numLayoutLines = numFormattedLines;

        }

    }

    else

    {

        // partial formatting mode

        // the number of formatted lines is unpredictable

        // ensure that the number of lines shown is maximum

        numLayoutLines = maxHeightInLines;

    }

    // previously, the control was laid out showing the maximum number of lines

    // lay out again only if the control should be smaller in height

    if (numLayoutLines < maxHeightInLines)

    {

        // parentRect was changed in the previous GetLayout()

        parentRect = aRect;

        layout = GetLayout(parentRect, numLayoutLines);

        AknLayoutUtils::LayoutEdwin(this, parentRect, layout, skinTextColor);

    }

}

#ifdef RD_SCALABLE_UI_V2

TRect CMIDTextFieldEdwin::LineRect(TRect aParentRect, TInt aLine, TAknMultiLineTextLayout aLayout)

{

    TAknLayoutText text;

    text.LayoutText(aParentRect, aLayout);

    TRect rect = text.TextRect();

    rect.iTl.iY += aLayout.iBaselineSkip * aLine;

    rect.iBr.iY += aLayout.iBaselineSkip * aLine;

    return rect;

}

#endif // RD_SCALABLE_UI_V2

#ifdef RD_SCALABLE_UI_V2

void CMIDTextFieldEdwin::SetThisScrollRect(CMIDTextFieldEdwin *aEdwin, TRect aParentRect, TAknMultiLineTextLayout aLayout, TInt aNumberOfLines)

{

    TRect top = LineRect(aParentRect, 1, aLayout);

    TRect bottom = LineRect(aParentRect, aNumberOfLines-2, aLayout);

    TRect area = TRect(top.iTl, bottom.iBr);

    aEdwin->CEikEdwin::SetScrollRect(area);

}

#endif // RD_SCALABLE_UI_V2

void CMIDTextFieldEdwin::HandleControlEventL(CCoeControl* aControl,TCoeEvent aEventType)

{

    switch (aEventType)

    {

    case MCoeControlObserver::EEventStateChanged:

        iTextFieldItem->HandleControlEventL(aControl, aEventType);

        break;

    case MCoeControlObserver::EEventRequestFocus:

        iTextFieldItem->HandleControlEventL(this, MCoeControlObserver::EEventRequestFocus);

        break;

    default:

        break;

    }

    CMIDEdwin::HandleControlEventL(aControl, aEventType);   // will update iStateChanged if needed

}

void CMIDTextFieldEdwin::PositionChanged()

{

    if (iTextFieldItem->Form())

    {

        TInt newYPos = iTextView->ViewRect().iTl.iY + iTextFieldItem->Form()->ScrollDelta();

        TRect rect;

        rect.SetRect(TPoint(iTextView->ViewRect().iTl.iX, newYPos), iTextView->ViewRect().Size());

        iTextView->SetViewRect(rect);

    }

}

/**

 * Need to recreate TextView here such that it uses the right window

 */

void CMIDTextFieldEdwin::SetContainerWindowL(const CCoeControl& aContainer)

{

    CMIDEdwin::SetContainerWindowL(aContainer);

    if (iTextView)

    {

        delete iTextView;

        iTextView = NULL;

        CreateTextViewL();

    }

}

void CMIDTextFieldEdwin::AddCommandToEdwinL(MMIDCommand& aCommand)

{

    STATIC_CAST(CMIDTextFieldItem*, iTextFieldItem)->AddCommandL(&aCommand);

}