txtwindw.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: txtwindw.cpp,v 1.1.2.1 2004/07/09 01:50:20 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
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 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
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 * will apply. You may also obtain the license terms directly from
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 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
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 * use your version of this file under the terms of any one of the
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 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
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 * This file, and the files included with this file, is distributed
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/////////////////////////////////////////////////////////////////////////////
//
//  TXTWINDW.CPP
//
//  TextWindow class implementation.
//
//	A class TextWindow object holds the location, size, background color,
//	...etc for the space on the screen where the text is to be rendered.
//

#include "hxtypes.h" /*Must be included before windows.h for VC6 compiler */

#if defined(_WINDOWS)
#include <windows.h>
#else
/*  Need to include what's necessary for window resources: mac, ppc, unix. */
#endif

#include <stdlib.h>
#include <string.h>

#include "hxwintyp.h" //For struct HXxWindow

#include "rt_types.h"
#include "atocolor.h"
#include "atotime.h"
#include "rt_string.h"
#include "parsing.h"

#include "fontdefs.h" //for CHARSET defines.

#include "hxslist.h" //for base class CHXSimpleList.
#include "hxstack.h" //for class CHXStack
#include "txtattrb.h" //for class TextAttributes
#include "txtcntnr.h" //for class TextAttributes
#include "textline.h" //for class TextLine & TextLineList
#include "textprsr.h" /* for REAL_TEXT_TRANSPARENT_BGCOLOR_MAJOR_VERSION + ... */

#include "txtwindw.h"

#include "fontinfo.h"  //for GetStringWidthInPixels() function.

#include "dict.h" /* For Unix font dict */

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static char HX_THIS_FILE[] = __FILE__;
#endif


/////////////////////////////////////////////////////////////////////////////
// Method:
//	TextWindowBase constructor
// Purpose:
//	Initializes all data members to default values.
//
TextWindowBase::TextWindowBase() :
	  m_width(WINDOW_DIMENSION_UNSPECIFIED)
	, m_height(WINDOW_DIMENSION_UNSPECIFIED)
    
	, m_ulContentMajorVersion(0L)
	, m_ulContentMinorVersion(0L)

	, m_borderSize(DEFAULT_BORDERSIZE)
	, m_upperLeftX(DEFAULT_WINDOWUPPERLEFTX)
	, m_upperLeftY(DEFAULT_WINDOWUPPERLEFTY)

	, m_scrollRate(SCROLLRATE_UNSPECIFIED)
	, m_crawlRate(CRAWLRATE_UNSPECIFIED)
	, m_type(TYPE_UNSPECIFIED)
	, m_scrollType(SCROLLTYPE_UNSPECIFIED)
	, m_backgroundColor(BGCOLOR_RGB_UNSPECIFIED)
        , m_ulBackgroundOpacity(255)
        , m_ulMediaOpacity(255)
        , m_bIsChromaKeySet(FALSE)
        , m_ulChromaKey(0)
        , m_ulChromaKeyTolerance(0)
        , m_ulChromaKeyOpacity(0)
	, m_loop(DOLOOP_UNSPECIFIED)

	, m_numBreakTagsEncountered(0L)

	, m_currentTextLineStartY(0L)
	, m_currentTextLineEndY(0L)
	, m_currentTextLineStartX(0L)
	, m_currentTextLineEndX(0L)
    
	, m_xOfFakeNewLine(0L)

	, m_linkColor(DEFAULT_LINKCOLOR)
	, m_bUnderlineHyperlinks(DEFAULT_DO_UNDERLINE_HYPERLINKS)
	, m_bUseWordwrap(DEFAULT_USE_WORDWRAP)

	, m_bExpandTabs(DEFAULT_EXPAND_TABS)
	, m_kHorizAlign(kHAlignLeft)
	, m_kVertAlign(kVAlignTop)
	, m_bVertAlignWasExplicitlySet(FALSE)
	, m_bRightToLeft(FALSE)
	, m_ulDefaultPointSize(DEFAULT_FONT_PTSIZE)
	, m_defaultTextColor(DEFAULT_TEXT_COLOR)
	, m_defaultTextBgColor(BGCOLOR_RGB_UNSPECIFIED)
	, m_ulDefaultFontWeight(DEFAULT_FONT_WEIGHT)
	, m_bDefaultFontStyleIsItalic(FALSE)
	, m_pDefaultFontFaceString(NULL)
	, m_pDefaultCharsetString(NULL)
	, m_bIsCharsetTranslatedForOS(FALSE)
	, m_dAngleOfEscapement(0.0)
	, m_dAngleOfCharOrientation(0.0)
	, m_bAngleOfCharOrientationWasExplicitlySet(FALSE)
	, m_bUserTextSizingPrefIsSet(FALSE)
	, m_bUserPrefSizeIsRelative(TRUE)
	, m_ulUserPrefTextSizeOrScaleFactorPct(100)

	, m_bDontIgnoreExtraSpaces(DEFAULT_DONT_IGNORE_EXTRA_SPACES)


	, m_ulNumberOfFontColorPushesInsideLinkText(0L)

	, m_bIsLiveSource(DEFAULT_IS_LIVE_SOURCE)

	, m_ulTimeAtStartup(0L)

	, m_ulTimeOfLastClearTag(0L)

	, m_newPktStartXAtTimeZero(INVALID_LONG32)
	, m_newPktStartYAtTimeZero(INVALID_LONG32)
    
	, m_bClearWasJustSent(FALSE)

	, m_bUseXPOSVal(FALSE)

	, m_bUseYPOSVal(FALSE)

	, m_ulInsideCommentTagNestCount(0L)

	, m_ulNumNewlinesStatedInPacketHeader(0L)

	, m_ulDuration(0L)
{    
    m_pTLList = new TextLineList;
    
    m_pFontUndoTagList = new TextLineList;

#if defined(_DEBUG)
    m_ulDebugFlags = 0L;
#endif
}



/////////////////////////////////////////////////////////////////////////////
// Method:
//	TextWindowBase destructor
// Purpose:
//	janitorial function.
//
TextWindowBase::~TextWindowBase()
{
    reset();
    if(m_pTLList)
    {
	m_pTLList->flush();
	delete m_pTLList;
	m_pTLList = NULL;
    }
    if(m_pFontUndoTagList)
    {
	m_pFontUndoTagList->flush();
	delete m_pFontUndoTagList;
	m_pFontUndoTagList = NULL;
    }

    if (m_pDefaultFontFaceString)
    {
	delete [] m_pDefaultFontFaceString;
	m_pDefaultFontFaceString = NULL;
    }

    if (m_pDefaultCharsetString)
    {
	delete [] m_pDefaultCharsetString;
	m_pDefaultCharsetString = NULL;
    }
}



/////////////////////////////////////////////////////////////////////////////
// Method:
//	 TextWindowBase::reset()
//
// Purpose:
//  Clears all text attribute stacks so that the next text that arrives will 
//  get the default font size, color, bold, ...etc, until new attribute tags
//  are received.
//
void TextWindowBase::reset()
{
    TextAttributeStacks::flush();
    TextContainerList::flush();
    if(m_pTLList)
    {
	m_pTLList->flush();
    }

    if(m_pFontUndoTagList)
    {
	m_pFontUndoTagList->flush();
    }
    
    m_numBreakTagsEncountered = 0L;

    m_currentTextLineStartY = m_currentTextLineEndY = 0L;
    m_currentTextLineStartX = m_currentTextLineEndX = 0L;
}



/////////////////////////////////////////////////////////////////////////////
// Method:
//  TextWindowBase::getCommentTagNestCount()
//
// Purpose:
//  Tells whether we're currently parsing inside HTML-style comments, i.e.,
//  <!-- we're inside a comment --> :
ULONG32 TextWindowBase::getCommentTagNestCount()
{
    return m_ulInsideCommentTagNestCount;
}
void TextWindowBase::setInsideCommentTagNestCount(ULONG32 ulCTNC)
{
    m_ulInsideCommentTagNestCount = ulCTNC;
}
ULONG32 TextWindowBase::incrementCommentTagNestCount()
{
    return ++m_ulInsideCommentTagNestCount;
}
ULONG32 TextWindowBase::decrementCommentTagNestCount()
{
    if(m_ulInsideCommentTagNestCount)
	m_ulInsideCommentTagNestCount--;
    return m_ulInsideCommentTagNestCount;
}




/////////////////////////////////////////////////////////////////////////////
// Method:
//	TextWindow constructor
// Purpose:
//	Initializes all data members to default values.
//
TextWindow::TextWindow() :
	  m_pURL(NULL)
	, m_ulLenURLbuf(0L)
	, m_ulTargetOfURL(URL_TARGET_INVALID)
	, m_ulTimeOfLastTimeSync(0L) //In live on encoder side, this needs to
				     // get reset to encoder start time which
				     // may not be zero.
#if defined(_WINDOWS)
	, m_pDeviceContextMemory(NULL)
#if !defined(USE_DIB_SECTION)
	, m_pBmpCompat(NULL)
#else //USE_DIB_SECTION:
	, m_hBitmap(NULL)
	, m_hOldBitmap(NULL)
	, m_LPBITMAPINFO(NULL)
	, m_pBits(NULL)
#endif
#elif defined(_MACINTOSH) || defined(_MAC_UNIX)
	, m_pOffScreenWorld(NULL)
#endif
	, m_visibleWindowWidth(0L)
	, m_visibleWindowHeight(0L)
	 
	, m_lCurrentXOffsetDueToLooping(0L)
	, m_lCurrentYOffsetDueToLooping(0L)

	, m_lCurrentYOffsetForTeleprompter(0L)

	, m_bPriorLineAlreadyCentered(FALSE)

	, m_bHandlingWindowResizing(FALSE)
{
#if defined(_UNIX) && !defined(_MAC_UNIX)
    m_font_dict = new Dict;
#endif

#ifdef _WINDOWS
#if !defined(USE_DIB_SECTION)
    m_hDIB = new CHXDIBits();
#else //USE_DIB_SECTION:
    //nothing to do here.
#endif
    m_pDeviceContextMemory = (void*)CreateCompatibleDC(NULL);
#endif // _WINDOWS

}



/////////////////////////////////////////////////////////////////////////////
// Method:
//	TextWindow destructor
// Purpose:
//	janitorial function.
//
TextWindow::~TextWindow()
{
    clear_all();
#if defined(_WINDOWS)
#if !defined(USE_DIB_SECTION)
    if(m_pBmpCompat)
    {
	DeleteObject((HBITMAP)m_pBmpCompat);
    }

    if (m_hDIB)
    {
	delete m_hDIB;
	m_hDIB = NULL;
    }
#else //USE_DIB_SECTION:
    if(m_hBitmap)
    {
	DeleteObject(m_hBitmap);
    }
    if(m_hOldBitmap  &&  m_pDeviceContextMemory)
    {
	SelectObject((HDC)m_pDeviceContextMemory, m_hOldBitmap);
    }
    m_hOldBitmap = NULL;
    
    if(m_LPBITMAPINFO)
    {
	delete m_LPBITMAPINFO;
	m_LPBITMAPINFO = NULL;
    }
    //XXXEH- clean up m_pBits here?  Or, no need to clean it up...?;
#endif

    if(m_pDeviceContextMemory)
    {
	DeleteDC((HDC)m_pDeviceContextMemory);
    }
#elif defined(_MACINTOSH) || defined(_MAC_UNIX)
    if(m_pOffScreenWorld)
    {
	DisposeGWorld(m_pOffScreenWorld);
	m_pOffScreenWorld=NULL;
    }
#else
    //platform-specific code needed here.
#endif

#if defined(_UNIX) && !defined(_MAC_UNIX)
    HX_DELETE(m_font_dict);
#endif
}



/////////////////////////////////////////////////////////////////////////////
// Method:
//	 TextWindow::clear_all()
//
// Purpose:
//	Erases all text that has already been received from the stream and clears
//	all text attribute stacks so that the next text that arrives will be 
//	rendered with the default font size, color, bold, ...etc, until new
//	attribute tags are received.
//
void TextWindow::clear_all()
{
    reset(); //::TextWindowBase's function.
    
    clearURL();

    m_ulTimeOfLastTimeSync=0L;
}


/////////////////////////////////////////////////////////////////////////////
// Methods:
//	TextWindow::getURL()
//	TextWindow::hasValidURL()
//	TextWindow::setURL(_CHAR* pNewURL, ULONG32 newURLstrlen)
//	TextWindow::clearURL()
//
// Purpose:
//	These functions keep track of
//
// Returns:
//	returns TRUE upon success, FALSE if (sr < MIN_SCROLLRATE) or if
//	(sr > MAX_SCROLLRATE):
//
_CHAR* TextWindow::getURL()
{
    return m_pURL;   //note: this may be NULL.
}

ULONG32 TextWindow::getLenURLbuf()
{
    return m_ulLenURLbuf;
}


BOOL TextWindow::hasValidURL()
{
    return (NULL!=m_pURL  &&  0<m_ulLenURLbuf);
}

//returns FALSE if pNewURL is empty or NULL:
BOOL TextWindow::setURL(_CHAR* pNewURL, ULONG32 newURLstrlen)
{
    if(!pNewURL  ||  !newURLstrlen)
    {
	return FALSE;
    }
    
    if(m_pURL)
    {
	delete [] m_pURL;
	m_pURL = NULL;
    }
    m_ulLenURLbuf = 0L;

    m_pURL = new _CHAR[newURLstrlen+1];
    HX_ASSERT(m_pURL);
    if(!m_pURL)
    {
	return FALSE;
    }

    m_pURL[newURLstrlen] = '\0'; //not needed, but do this anyway.
    m_ulLenURLbuf = newURLstrlen;