tqt3/tools/designer/shared/ui2uib.cpp

/**********************************************************************
** Copyright (C) 2000-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of TQt Designer.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid TQt Commercial licenses may use this file in
** accordance with the TQt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#include "ui2uib.h"
#include "uib.h"

#include <domtool.h>

#include <ntqcolor.h>
#include <ntqcursor.h>
#include <ntqdatetime.h>
#include <ntqdom.h>
#include <ntqfile.h>
#include <ntqfont.h>
#include <ntqobject.h>
#include <ntqrect.h>
#include <ntqsizepolicy.h>

/*
    The .uib file format is the binary counterpart of the .ui file
    format. It is generated by the ui2uib converter and understood by
    TQWidgetFactory; in a future version, it might also be understood
    by a uib2ui converter. Experiments show that .uib files are about
    2.5 times faster to load and 6 times smaller than .ui files.

    The .uib format, unlike the .ui format, is internal to Trolltech
    and is not officially documented; it is assumed that anybody who
    needs to understand the file format can read the ui2uib and
    TQWidgetFactory source code, with some guidance. And here's some
    guidance.

    A .uib file starts with a 32-bit magic number that allows
    TQWidgetFactory to determine the file type. The magic number is
    followed by '\n' (0x0a) and '\r' (0x0d), which ensure that the
    file wasn't corrupted during transfer between different
    platforms. For example, transferring a .ui file from Windows to
    Unix using FTP with type ASCII will produce a file with '\r\n\r'
    in place of '\n\r'. This is followed by the TQDataStream format
    version number used.

    The rest of the file is made up of blocks, each of which starts
    with a block type (Block_XXX) and a block length. Block_Intro and
    Block_Widget are mandatory; the others are optional.
    TQWidgetFactory makes certain assumptions about the order of the
    blocks; for example, it expects Block_String before any other
    block that refers to a string and Block_Images before
    Block_Widget. The order generated by ui2uib is one of the orders
    that make sense. Just after the last block, a Block_End marker
    indicates the end of the file.

    The division of .uib files into blocks corresponds grossly to the
    division of .ui files in top-level XML elements. Thus,
    Block_Widget corresponds to <widget> and Block_Toolbars to
    <toolbars>. The internal organization of each block also mimics
    the organization of the corresponding XML elements.

    These are the major differences, all of which contribute to
    making .uib files more compact:

    1.  The strings are gathered in Block_Strings, a string-table.
	When a string is needed later, it is referenced by a 32-bit
	index into that table. The UicStringTable class makes the
	whole process of inserting and looking up strings very
	simple. The advantage of this scheme is that if a string is
	used more than once, it is stored only once. Also, the
	string-table is preinitialized with very common strings, so
	that these need not be stored along with .uib files.

    2.  TQObjects are referred to by index in a table rather than by
	name. The table itself is not stored in the .uib file; it is
	rather build dynamically by ui2uib and TQWidgetFactory as new
	objects are specified. In ui2uib, the table is represented by
	a UibIndexMap object; in TQWidgetFactory, a plain array of
	TQObject pointers suffices.

    3.  The data is packed to take as little place as possible,
	without slowing down TQLayoutFactory too much. For example, an
	index into the string-table is a 32-bit integer, but in
	practice it is rarely above 65534, so only 16 bits are used
	for them; when an index above 65534 is met, the index is
	saved as 65535 followed by the 32-bit index, for a total of
	48 bits.

    4.  The name of a signal or slot and its signature are saved
	separately. That way, if a signal 'foo(const TQString&)' is
	connected to a slot 'bar(const TQString&)', the string-table
	will only contain 'foo', 'bar', and '(const TQString&)',
	instead of the longer 'foo(const TQString&)' and 'bar(const
	TQString&)'. The signatures are normalized beforehand to
	ensure that trivial spacing problems don't result in multiple
	string-table entries.

    5.  In a signal-to-slot connection, a sender, signal, receiver,
	or slot is not repeated if it's the same as for the previous
	connection. Bit flags indicate what is repeated and what is
	specified.

    6.  Some of the information stored in a .ui file is useful only
	by uic, not to TQLayoutFactory. That information is, for now,
	not taken along in the .uib file. Likewise, needless
	TQLayoutWidget objects are not taken along.

    The arbitrary constants related to the .uib file formats are
    defined in uib.h. Constants such as Block_Actions and
    Object_SubWidget are given values such as 'A' and 'W' to make
    .uib files easier to read in a hexadecimal editor.

    The file format isn't designed to be extensible. Any extension
    that prevents an older version of TQLayoutWidget of reading the
    file correctly must have a different magic number. The plan is to
    use UibMagic + 1 for version 2, UibMagic + 2 for version 3, etc.
*/

static TQCString layoutForTag( const TQString& tag )
{
    if ( tag == "grid" ) {
	return "TQGridLayout";
    } else if ( tag == "hbox" ) {
	return "TQHBoxLayout";
    } else if ( tag == "vbox" ) {
	return "TQVBoxLayout";
    } else {
	return "TQLayout";
    }
}

class UibHack : public TQObject
{
public:
    static TQString normalize( const TQString& member ) {
	return TQString::fromUtf8( TQObject::normalizeSignalSlot(member.utf8()) );
    }
};

class UibIndexMap
{
public:
    UibIndexMap() : next( 0 ) { }

    void insert( const TQString& name ) { setName( insert(), name ); }
    int insert() { return next++; }
    void setName( int no, const TQString& name );

    int find( const TQString& name, int deflt = -1 ) const;
    int count() const { return next; }

private:
    TQMap<TQString, int> nameMap;
    TQMap<TQString, int> conflicts;
    int next;
};

void UibIndexMap::setName( int no, const TQString& name )
{
    if ( !name.isEmpty() ) {
	if ( *nameMap.insert(name, no, FALSE) != no )
	    conflicts.insert( name, 0 );
    }
}

int UibIndexMap::find( const TQString& name, int deflt ) const
{
    TQMap<TQString, int>::ConstIterator no = nameMap.find( name );
    if ( no == nameMap.end() || conflicts.contains(name) ) {
	return deflt;
    } else {
	return *no;
    }
}

static void packUInt16( TQDataStream& out, TQ_UINT16 n )
{
    if ( n < 255 ) {
	out << (TQ_UINT8) n;
    } else {
	out << (TQ_UINT8) 255;
	out << n;
    }
}

static void packUInt32( TQDataStream& out, TQ_UINT32 n )
{
    if ( n < 65535 ) {
	out << (TQ_UINT16) n;
    } else {
	out << (TQ_UINT16) 65535;
	out << n;
    }
}

static void packByteArray( TQDataStream& out, const TQByteArray& array )
{
    packUInt32( out, array.size() );
    out.writeRawBytes( array.data(), array.size() );
}

static void packCString( UibStrTable& strings, TQDataStream& out,
			 const char *cstr )
{
    packUInt32( out, strings.insertCString(cstr) );
}

static void packString( UibStrTable& strings, TQDataStream& out,
			const TQString& str )
{
    packUInt32( out, strings.insertString(str) );
}

static void packStringSplit( UibStrTable& strings, TQDataStream& out,
			     const TQString& str, TQChar sep )
{
    int pos = str.find( sep );
    if ( pos == -1 )
	pos = str.length();
    packString( strings, out, str.left(pos) );
    packString( strings, out, str.mid(pos) );
}

static void packVariant( UibStrTable& strings, TQDataStream& out,
			 TQVariant value, TQString tag = "" )
{
    TQStringList::ConstIterator s;

    TQ_UINT8 type = value.type();
    if ( tag == "pixmap" ) {
	type = TQVariant::Pixmap;
    } else if ( tag == "image" ) {
	type = TQVariant::Image;
    } else if ( tag == "iconset" ) {
	type = TQVariant::IconSet;
    }
    out << type;

    switch ( type ) {
    case TQVariant::String:
    case TQVariant::Pixmap:
    case TQVariant::Image:
    case TQVariant::IconSet:
	packString( strings, out, value.asString() );
	break;
    case TQVariant::StringList:
	packUInt16( out, value.asStringList().count() );
	s = value.asStringList().begin();
	while ( s != value.asStringList().end() ) {
	    packString( strings, out, *s );
	    ++s;
	}
	break;
    case TQVariant::Font:
	out << value.asFont();
	break;
    case TQVariant::Rect:
	packUInt16( out, value.asRect().x() );
	packUInt16( out, value.asRect().y() );
	packUInt16( out, value.asRect().width() );
	packUInt16( out, value.asRect().height() );
	break;
    case TQVariant::Size:
	packUInt16( out, value.asSize().width() );
	packUInt16( out, value.asSize().height() );
	break;
    case TQVariant::Color:
	out << value.asColor();
	break;
    case TQVariant::Point:
	packUInt16( out, value.asPoint().x() );
	packUInt16( out, value.asPoint().y() );
	break;
    case TQVariant::Int:
	packUInt32( out, value.asInt() );
	break;
    case TQVariant::Bool:
	out << (TQ_UINT8) value.asBool();
	break;
    case TQVariant::Double:
	out << value.asDouble();
	break;
    case TQVariant::CString:
	packCString( strings, out, value.asCString() );
	break;
    case TQVariant::Cursor:
	out << value.asCursor();
	break;
    case TQVariant::Date:
	out << value.asDate();
	break;
    case TQVariant::Time:
	out << value.asTime();
	break;
    case TQVariant::DateTime:
	out << value.asDateTime();
	break;
    default:
	out << value;
    }
}

static void outputProperty( TQMap<int, TQStringList>& buddies, int objectNo,
			    UibStrTable& strings, TQDataStream& out,
			    TQDomElement elem )
{
    TQCString name = elem.attribute( "name" ).latin1();
    TQDomElement f = elem.firstChild().toElement();
    TQString tag = f.tagName();
    TQString comment;
    TQVariant value;

    if ( name == "resizeable" )
	name = "resizable";

    if ( tag == "font" ) {
	TQString family;
	TQ_UINT16 pointSize = 65535;
	TQ_UINT8 fontFlags = 0;

	TQDomElement g = f.firstChild().toElement();
	while ( !g.isNull() ) {
	    TQString text = g.firstChild().toText().data();
	    if ( g.tagName() == "family" ) {
		fontFlags |= Font_Family;
		family = text;
	    } else if ( g.tagName() == "pointsize" ) {
		fontFlags |= Font_PointSize;
		pointSize = (TQ_UINT16) text.toUInt();
	    } else {
		if ( g.firstChild().toText().data().toInt() != 0 ) {
		    if ( g.tagName() == "bold" ) {
			fontFlags |= Font_Bold;
		    } else if ( g.tagName() == "italic" ) {
			fontFlags |= Font_Italic;
		    } else if ( g.tagName() == "underline" ) {
			fontFlags |= Font_Underline;
		    } else if ( g.tagName() == "strikeout" ) {
			fontFlags |= Font_StrikeOut;
		    }
		}
	    }
	    g = g.nextSibling().toElement();
	}

	out << (TQ_UINT8) Object_FontProperty;
	packCString( strings, out, name );
	out << fontFlags;
	if ( fontFlags & Font_Family )
	    packString( strings, out, family );
	if ( fontFlags & Font_PointSize )
	    packUInt16( out, pointSize );
    } else if ( tag == "palette" ) {
	out << (TQ_UINT8) Object_PaletteProperty;
	packCString( strings, out, name );

	TQDomElement g = f.firstChild().toElement();
	while ( !g.isNull() ) {
	    TQDomElement h = g.firstChild().toElement();
	    while ( !h.isNull() ) {
		value = DomTool::elementToVariant( h, TQt::gray );
		if ( h.tagName() == "color" ) {
		    out << (TQ_UINT8) Palette_Color;
		    out << value.asColor();
		} else if ( h.tagName() == "pixmap" ) {
		    out << (TQ_UINT8) Palette_Pixmap;
		    packVariant( strings, out, value, "pixmap" );
		}
		h = h.nextSibling().toElement();
	    }

	    if ( g.tagName() == "active" ) {
		out << (TQ_UINT8) Palette_Active;
	    } else if ( g.tagName() == "inactive" ) {
		out << (TQ_UINT8) Palette_Inactive;
	    } else {
		out << (TQ_UINT8) Palette_Disabled;
	    }
	    g = g.nextSibling().toElement();
	}
	out << (TQ_UINT8) Palette_End;
    } else {
	value = DomTool::elementToVariant( f, value, comment );
	if ( value.isValid() ) {
	    if ( name == "buddy" ) {
		buddies[objectNo] += value.asString();
	    } else {
		if ( tag == "string" ) {
		    out << (TQ_UINT8) Object_TextProperty;
		    packCString( strings, out, name );
		    packCString( strings, out, value.asString().utf8() );
		    packCString( strings, out, comment.utf8() );
		} else {
		    out << (TQ_UINT8) Object_VariantProperty;
		    packCString( strings, out, name );
		    packVariant( strings, out, value, tag );
		}
	    }
	}
    }
}

static void outputGridCell( TQDataStream& out, TQDomElement elem )
{
    int column = elem.attribute( "column", "0" ).toInt();
    int row = elem.attribute( "row", "0" ).toInt();
    int colspan = elem.attribute( "colspan", "1" ).toInt();
    int rowspan = elem.attribute( "rowspan", "1" ).toInt();
    if ( colspan < 1 )
	colspan = 1;
    if ( rowspan < 1 )
	rowspan = 1;

    if ( column != 0 || row != 0 || colspan != 1 || rowspan != 1 ) {
	out << (TQ_UINT8) Object_GridCell;
	packUInt16( out, column );
	packUInt16( out, row );
	packUInt16( out, colspan );
	packUInt16( out, rowspan );
    }
}

static int outputObject( TQMap<int, TQStringList>& buddies,
			 UibIndexMap& objects, UibStrTable& strings,
			 TQDataStream& out, TQDomElement elem,
			 TQCString className = "" );

static void outputLayoutWidgetsSubLayout( TQMap<int, TQStringList>& buddies,
					  UibIndexMap& objects,
					  UibStrTable& strings,
					  TQDataStream& out, TQDomElement elem )
{
    int subLayoutNo = -1;
    TQCString name;
    TQDomElement nameElem;

    TQDomElement f = elem.firstChild().toElement();
    while ( !f.isNull() ) {
	TQString tag = f.tagName();
	if ( tag == "grid" || tag == "hbox" || tag == "vbox" ) {
	    out << (TQ_UINT8) Object_SubLayout;
	    subLayoutNo = outputObject( buddies, objects, strings, out, f,
					layoutForTag(tag) );
	} else if ( tag == "property" ) {
	    if ( f.attribute("name") == "name" ) {
		name = DomTool::elementToVariant( f, name ).asCString();
		nameElem = f;
	    }
	}
	f = f.nextSibling().toElement();
    }

    if ( subLayoutNo != -1 ) {
	/*
	  Remove the sub-layout's Object_End marker, append the grid
	  cell and the correct name property, and put the Object_End
	  marker back.
	*/
	out.device()->at( out.device()->at() - 1 );
	outputGridCell( out, elem );
	outputProperty( buddies, subLayoutNo, strings, out, nameElem );
	out << (TQ_UINT8) Object_End;

	objects.setName( subLayoutNo, name );
    }
}

static int outputObject( TQMap<int, TQStringList>& buddies,
			 UibIndexMap& objects, UibStrTable& strings,
			 TQDataStream& out, TQDomElement elem,
			 TQCString className )
{
    bool isTQObject = !className.isEmpty();

    if ( className == "TQToolBar" )
	out << (TQ_UINT8) elem.attribute( "dock", "0" ).toInt();
    if ( className == "TQWidget" )
	className = elem.attribute( "class", className ).latin1();

    int objectNo = -1;
    if ( isTQObject ) {
	packCString( strings, out, className );
	objectNo = objects.insert();
    }

    outputGridCell( out, elem );

    // optimization: insert '&Foo' into string-table before 'Foo'
    if ( className == "TQAction" || className == "TQActionGroup" ) {
	TQVariant value = DomTool::readProperty( elem, "menuText", TQVariant() );
	if ( value.asString().startsWith("&") )
	    strings.insertString( value.asString() );
    }

    TQDomElement f = elem.firstChild().toElement();
    while ( !f.isNull() ) {
	TQString tag = f.tagName();
	if ( tag == "action" ) {
	    if ( elem.tagName() == "item" || elem.tagName() == "toolbar" ) {
		TQString actionName = f.attribute( "name" );
		int no = objects.find( actionName );
		if ( no != -1 ) {
		    out << (TQ_UINT8) Object_ActionRef;
		    packUInt16( out, no );
		}
	    } else {
		out << (TQ_UINT8) Object_SubAction;
		outputObject( buddies, objects, strings, out, f, "TQAction" );
	    }
	} else if ( tag == "actiongroup" ) {
	    out << (TQ_UINT8) Object_SubAction;
	    outputObject( buddies, objects, strings, out, f, "TQActionGroup" );
	} else if ( tag == "attribute" ) {
	    out << (TQ_UINT8) Object_Attribute;
	    outputProperty( buddies, objectNo, strings, out, f );
	} else if ( tag == "column" ) {
	    out << (TQ_UINT8) Object_Column;
	    outputObject( buddies, objects, strings, out, f );
	} else if ( tag == "event" ) {
	    out << (TQ_UINT8) Object_Event;
	    packCString( strings, out, f.attribute("name").latin1() );
	    packVariant( strings, out,
			 TQStringList::split(',', f.attribute("functions")) );
	} else if ( tag == "grid" || tag == "hbox" || tag == "vbox" ) {
	    out << (TQ_UINT8) Object_SubLayout;
	    outputObject( buddies, objects, strings, out, f,
			  layoutForTag(tag) );
	} else if ( tag == "item" ) {
	    if ( elem.tagName() == "menubar" ) {
		out << (TQ_UINT8) Object_MenuItem;
		packCString( strings, out, f.attribute("name").latin1() );
		packCString( strings, out, f.attribute("text").utf8() );
		outputObject( buddies, objects, strings, out, f );
	    } else {
		out << (TQ_UINT8) Object_Item;
		outputObject( buddies, objects, strings, out, f );
	    }
	} else if ( tag == "property" ) {
	    outputProperty( buddies, objectNo, strings, out, f );
	} else if ( tag == "row" ) {
	    out << (TQ_UINT8) Object_Row;
	    outputObject( buddies, objects, strings, out, f );
	} else if ( tag == "separator" ) {
	    out << (TQ_UINT8) Object_Separator;
	} else if ( tag == "spacer" ) {
	    out << (TQ_UINT8) Object_Spacer;
	    outputObject( buddies, objects, strings, out, f );
	} else if ( tag == "widget" ) {
	    if ( f.attribute("class") == "TQLayoutWidget" &&
		 elem.tagName() != "widget" ) {
		outputLayoutWidgetsSubLayout( buddies, objects, strings, out,
					      f );
	    } else {
		out << (TQ_UINT8) Object_SubWidget;
		outputObject( buddies, objects, strings, out, f, "TQWidget" );
	    }
	}
	f = f.nextSibling().toElement();
    }
    out << (TQ_UINT8) Object_End;
    if ( isTQObject )
	objects.setName( objectNo,
			 DomTool::readProperty(elem, "name", "").asString() );
    return objectNo;
}

static void outputBlock( TQDataStream& out, BlockTag tag,
			 const TQByteArray& data )
{
    if ( !data.isEmpty() ) {
	out << (TQ_UINT8) tag;
	packByteArray( out, data );
    }
}

void convertUiToUib( TQDomDocument& doc, TQDataStream& out )
{
    TQByteArray introBlock;
    TQByteArray actionsBlock;
    TQByteArray buddiesBlock;
    TQByteArray connectionsBlock;
    TQByteArray functionsBlock;
    TQByteArray imagesBlock;
    TQByteArray menubarBlock;
    TQByteArray slotsBlock;
    TQByteArray tabstopsBlock;
    TQByteArray toolbarsBlock;
    TQByteArray variablesBlock;
    TQByteArray widgetBlock;

    TQDomElement actionsElem;
    TQDomElement connectionsElem;
    TQDomElement imagesElem;
    TQDomElement menubarElem;
    TQDomElement tabstopsElem;
    TQDomElement toolbarsElem;
    TQDomElement widgetElem;

    TQMap<int, TQStringList> buddies;
    UibStrTable strings;
    UibIndexMap objects;
    int widgetNo = -1;
    TQCString className;
    TQ_INT16 defaultMargin = -32768;
    TQ_INT16 defaultSpacing = -32768;
    TQ_UINT8 introFlags = 0;

    TQDomElement elem = doc.firstChild().toElement().firstChild().toElement();
    while ( !elem.isNull() ) {
	TQString tag = elem.tagName();

	switch ( tag[0].latin1() ) {
	case 'a':
	    if ( tag == "actions" )
		actionsElem = elem;
	    break;
	case 'c':
	    if ( tag == "class" ) {
		className = elem.firstChild().toText().data().latin1();
	    } else if ( tag == "connections" ) {
		connectionsElem = elem;
	    }
	    break;
	case 'f':
	    if ( tag == "functions" ) {
		TQDataStream out2( functionsBlock, IO_WriteOnly );
		TQDomElement f = elem.firstChild().toElement();
		while ( !f.isNull() ) {
		    if ( f.tagName() == "function" ) {
			packStringSplit( strings, out2,
					 f.attribute("name").latin1(), '(' );
			packString( strings, out2,
				    f.firstChild().toText().data() );
		    }
		    f = f.nextSibling().toElement();
		}
	    }
	    break;
	case 'i':
	    if ( tag == "images" ) {
		TQDataStream out2( imagesBlock, IO_WriteOnly );
		TQDomElement f = elem.firstChild().toElement();
		while ( !f.isNull() ) {
		    if ( f.tagName() == "image" ) {
			TQString name = f.attribute( "name" );
			TQDomElement g = f.firstChild().toElement();
			if ( g.tagName() == "data" ) {
			    TQString format = g.attribute( "format", "PNG" );
			    TQString hex = g.firstChild().toText().data();
			    int n = hex.length() / 2;
			    TQByteArray data( n );
			    for ( int i = 0; i < n; i++ )
				data[i] = (char) hex.mid( 2 * i, 2 )
						    .toUInt( 0, 16 );

			    packString( strings, out2, name );
			    packString( strings, out2, format );
			    packUInt32( out2, g.attribute("length").toInt() );
			    packByteArray( out2, data );
			}
		    }
		    f = f.nextSibling().toElement();
		}
	    }
	    break;
	case 'l':
	    if ( tag == "layoutdefaults" ) {
		TQString margin = elem.attribute( "margin" );
		if ( !margin.isEmpty() )
		    defaultMargin = margin.toInt();
		TQString spacing = elem.attribute( "spacing" );
		if ( !spacing.isEmpty() )
		    defaultSpacing = spacing.toInt();
	    }
	    break;
	case 'm':
	    if ( tag == "menubar" )
		menubarElem = elem;
	    break;
	case 'p':
	    if ( tag == "pixmapinproject" )
		introFlags |= Intro_Pixmapinproject;
	    break;
	case 's':
	    if ( tag == "slots" ) {
		TQDataStream out2( slotsBlock, IO_WriteOnly );
		TQDomElement f = elem.firstChild().toElement();
		while ( !f.isNull() ) {
		    if ( f.tagName() == "slot" ) {
			TQString language = f.attribute( "language", "C++" );
			TQString slot = UibHack::normalize(
				f.firstChild().toText().data() );
			packString( strings, out2, language );
			packStringSplit( strings, out2, slot, '(' );
		    }
		    f = f.nextSibling().toElement();
		}
	    }
	    break;
	case 't':
	    if ( tag == "tabstops" ) {
		tabstopsElem = elem;
	    } else if ( tag == "toolbars" ) {
		toolbarsElem = elem;
	    }
	    break;
	case 'v':
	    if ( tag == "variable" ) {
		TQDataStream out2( variablesBlock, IO_WriteOnly | IO_Append );
		packString( strings, out2, elem.firstChild().toText().data() );
	    } else if ( tag == "variables" ) {
		TQDataStream out2( variablesBlock, IO_WriteOnly );
		TQDomElement f = elem.firstChild().toElement();
		while ( !f.isNull() ) {
		    if ( f.tagName() == "variable" )
			packString( strings, out2,
				    f.firstChild().toText().data() );
		    f = f.nextSibling().toElement();
		}
	    }
	    break;
	case 'w':
	    if ( tag == "widget" )
		widgetElem = elem;
	}
	elem = elem.nextSibling().toElement();
    }

    {
	TQDataStream out2( widgetBlock, IO_WriteOnly );
	widgetNo = outputObject( buddies, objects, strings, out2, widgetElem,
				 "TQWidget" );
    }

    if ( !tabstopsElem.isNull() ) {
	TQDataStream out2( tabstopsBlock, IO_WriteOnly );
	TQDomElement f = tabstopsElem.firstChild().toElement();
	while ( !f.isNull() ) {
	    if ( f.tagName() == "tabstop" ) {
		TQString widgetName = f.firstChild().toText().data();
		int no = objects.find( widgetName );
		if ( no != -1 )
		    packUInt16( out2, no );
	    }
	    f = f.nextSibling().toElement();
	}
    }

    if ( !actionsElem.isNull() ) {
	TQDataStream out2( actionsBlock, IO_WriteOnly );
	outputObject( buddies, objects, strings, out2, actionsElem );
    }

    if ( !menubarElem.isNull() ) {
	TQDataStream out2( menubarBlock, IO_WriteOnly );
	outputObject( buddies, objects, strings, out2, menubarElem,
		      "TQMenuBar" );
    }

    if ( !toolbarsElem.isNull() ) {
	TQDataStream out2( toolbarsBlock, IO_WriteOnly );
	TQDomElement f = toolbarsElem.firstChild().toElement();
	while ( !f.isNull() ) {
	    if ( f.tagName() == "toolbar" )
		outputObject( buddies, objects, strings, out2, f, "TQToolBar" );
	    f = f.nextSibling().toElement();
	}
    }

    if ( !buddies.isEmpty() ) {
	TQDataStream out2( buddiesBlock, IO_WriteOnly );
	TQMap<int, TQStringList>::ConstIterator a = buddies.begin();
	while ( a != buddies.end() ) {
	    TQStringList::ConstIterator b = (*a).begin();
	    while ( b != (*a).end() ) {
		int no = objects.find( *b );
		if ( no != -1 ) {
		    packUInt16( out2, a.key() );
		    packUInt16( out2, no );
		}
		++b;
	    }
	    ++a;
	}
    }

    if ( !connectionsElem.isNull() ) {
	TQString prevLanguage = "C++";
	int prevSenderNo = 0;
	TQString prevSignal = "clicked()";
	int prevReceiverNo = 0;
	TQString prevSlot = "accept()";

	TQDataStream out2( connectionsBlock, IO_WriteOnly );
	TQDomElement f = connectionsElem.firstChild().toElement();
	while ( !f.isNull() ) {
	    if ( f.tagName() == "connection" ) {
		TQMap<TQString, TQString> argMap;

		TQDomElement g = f.firstChild().toElement();
		while ( !g.isNull() ) {
		    argMap[g.tagName()] = g.firstChild().toText().data();
		    g = g.nextSibling().toElement();
		}

		TQString language = f.attribute( "language", "C++" );
		int senderNo = objects.find( argMap["sender"], widgetNo );
		int receiverNo = objects.find( argMap["receiver"], widgetNo );
		TQString signal = UibHack::normalize( argMap["signal"] );
		TQString slot = UibHack::normalize( argMap["slot"] );

		TQ_UINT8 connectionFlags = 0;
		if ( language != prevLanguage )
		    connectionFlags |= Connection_Language;
		if ( senderNo != prevSenderNo )
		    connectionFlags |= Connection_Sender;
		if ( signal != prevSignal )
		    connectionFlags |= Connection_Signal;
		if ( receiverNo != prevReceiverNo )
		    connectionFlags |= Connection_Receiver;
		if ( slot != prevSlot )
		    connectionFlags |= Connection_Slot;
		out2 << connectionFlags;

		if ( connectionFlags & Connection_Language )
		    packString( strings, out2, language );
		if ( connectionFlags & Connection_Sender )
		    packUInt16( out2, senderNo );
		if ( connectionFlags & Connection_Signal )
		    packStringSplit( strings, out2, signal, '(' );
		if ( connectionFlags & Connection_Receiver )
		    packUInt16( out2, receiverNo );
		if ( connectionFlags & Connection_Slot )
		    packStringSplit( strings, out2, slot, '(' );

		prevLanguage = language;
		prevSenderNo = senderNo;
		prevSignal = signal;
		prevReceiverNo = receiverNo;
		prevSlot = slot;
	    } else if ( f.tagName() == "slot" ) {
		// ###
	    }
	    f = f.nextSibling().toElement();
	}
    }

    {
	TQDataStream out2( introBlock, IO_WriteOnly );
	out2 << introFlags;
	out2 << defaultMargin;
	out2 << defaultSpacing;
	packUInt16( out2, objects.count() );
	packCString( strings, out2, className );
    }

    out << UibMagic;
    out << (TQ_UINT8) '\n';
    out << (TQ_UINT8) '\r';
    out << (TQ_UINT8) out.version();
    outputBlock( out, Block_Strings, strings.block() );
    outputBlock( out, Block_Intro, introBlock );
    outputBlock( out, Block_Images, imagesBlock );
    outputBlock( out, Block_Widget, widgetBlock );
    outputBlock( out, Block_Slots, slotsBlock );
    outputBlock( out, Block_Tabstops, tabstopsBlock );
    outputBlock( out, Block_Actions, actionsBlock );
    outputBlock( out, Block_Menubar, menubarBlock );
    outputBlock( out, Block_Toolbars, toolbarsBlock );
    outputBlock( out, Block_Variables, variablesBlock );
    outputBlock( out, Block_Functions, functionsBlock );
    outputBlock( out, Block_Buddies, buddiesBlock );
    outputBlock( out, Block_Connections, connectionsBlock );
    out << (TQ_UINT8) Block_End;
}