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e793ec144962e443c6fa51ffb628136eab8263ab
wxWidgets/src/html/winpars.cpp
Václav Slavík c44a49b852 Use fixed screen DPI of 96 when printing HTML. 
Unlike font sizes, which depend on screen resolution because of weird
wxFont API, pixel sizes used elsewhere (and in particular, for images)
shouldn't depend on screen DPI.

This finally makes the output independent of screen size.

Fixes #10942.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63781 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2010-03-29 14:19:06 +00:00

756 lines
20 KiB
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/////////////////////////////////////////////////////////////////////////////
// Name: src/html/winpars.cpp
// Purpose: wxHtmlParser class (generic parser)
// Author: Vaclav Slavik
// RCS-ID: $Id$
// Copyright: (c) 1999 Vaclav Slavik
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_HTML && wxUSE_STREAMS
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/dc.h"
#include "wx/log.h"
#include "wx/settings.h"
#endif
#include "wx/html/htmldefs.h"
#include "wx/html/winpars.h"
#include "wx/html/htmlwin.h"
#include "wx/fontmap.h"
#include "wx/uri.h"
//-----------------------------------------------------------------------------
// wxHtmlWinParser
//-----------------------------------------------------------------------------
IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinParser, wxHtmlParser)
wxList wxHtmlWinParser::m_Modules;
wxHtmlWinParser::wxHtmlWinParser(wxHtmlWindowInterface *wndIface)
{
m_tmpStrBuf = NULL;
m_tmpStrBufSize = 0;
m_windowInterface = wndIface;
m_Container = NULL;
m_DC = NULL;
m_CharHeight = m_CharWidth = 0;
m_UseLink = false;
#if !wxUSE_UNICODE
m_nbsp = 0;
m_EncConv = NULL;
m_InputEnc = wxFONTENCODING_ISO8859_1;
m_OutputEnc = wxFONTENCODING_DEFAULT;
#endif
m_whitespaceMode = Whitespace_Normal;
m_lastWordCell = NULL;
m_posColumn = 0;
{
int i, j, k, l, m;
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
for (k = 0; k < 2; k++)
for (l = 0; l < 2; l++)
for (m = 0; m < 7; m++)
{
m_FontsTable[i][j][k][l][m] = NULL;
m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
#if !wxUSE_UNICODE
m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
#endif
}
SetFonts(wxEmptyString, wxEmptyString, NULL);
}
// fill in wxHtmlParser's tables:
wxList::compatibility_iterator node = m_Modules.GetFirst();
while (node)
{
wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node->GetData();
mod->FillHandlersTable(this);
node = node->GetNext();
}
}
wxHtmlWinParser::~wxHtmlWinParser()
{
int i, j, k, l, m;
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
for (k = 0; k < 2; k++)
for (l = 0; l < 2; l++)
for (m = 0; m < 7; m++)
{
if (m_FontsTable[i][j][k][l][m] != NULL)
delete m_FontsTable[i][j][k][l][m];
}
#if !wxUSE_UNICODE
delete m_EncConv;
#endif
delete[] m_tmpStrBuf;
}
void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
{
m_Modules.Append(module);
}
void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
{
m_Modules.DeleteObject(module);
}
// build all HTML font sizes (1..7) from the given base size
static void wxBuildFontSizes(int *sizes, int size)
{
// using a fixed factor (1.2, from CSS2) is a bad idea as explained at
// http://www.w3.org/TR/CSS21/fonts.html#font-size-props but this is by far
// simplest thing to do so still do it like this for now
sizes[0] = int(size * 0.75); // exception to 1.2 rule, otherwise too small
sizes[1] = int(size * 0.83);
sizes[2] = size;
sizes[3] = int(size * 1.2);
sizes[4] = int(size * 1.44);
sizes[5] = int(size * 1.73);
sizes[6] = int(size * 2);
}
static int wxGetDefaultHTMLFontSize()
{
// base the default font size on the size of the default system font but
// also ensure that we have a font of reasonable size, otherwise small HTML
// fonts are unreadable
int size = wxNORMAL_FONT->GetPointSize();
if ( size < 10 )
size = 10;
return size;
}
void wxHtmlWinParser::SetFonts(const wxString& normal_face,
const wxString& fixed_face,
const int *sizes)
{
static int default_sizes[7] = { 0 };
if ( !sizes )
{
if ( !default_sizes[0] )
wxBuildFontSizes(default_sizes, wxGetDefaultHTMLFontSize());
sizes = default_sizes;
}
int i, j, k, l, m;
for (i = 0; i < 7; i++)
m_FontsSizes[i] = sizes[i];
m_FontFaceFixed = fixed_face;
m_FontFaceNormal = normal_face;
#if !wxUSE_UNICODE
SetInputEncoding(m_InputEnc);
#endif
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
for (k = 0; k < 2; k++)
for (l = 0; l < 2; l++)
for (m = 0; m < 7; m++) {
if (m_FontsTable[i][j][k][l][m] != NULL)
{
delete m_FontsTable[i][j][k][l][m];
m_FontsTable[i][j][k][l][m] = NULL;
}
}
}
void wxHtmlWinParser::SetStandardFonts(int size,
const wxString& normal_face,
const wxString& fixed_face)
{
if (size == -1)
size = wxGetDefaultHTMLFontSize();
int f_sizes[7];
wxBuildFontSizes(f_sizes, size);
wxString normal = normal_face;
if ( normal.empty() )
normal = wxNORMAL_FONT->GetFaceName();
SetFonts(normal, fixed_face, f_sizes);
}
void wxHtmlWinParser::InitParser(const wxString& source)
{
wxHtmlParser::InitParser(source);
wxASSERT_MSG(m_DC != NULL, wxT("no DC assigned to wxHtmlWinParser!!"));
m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
m_FontSize = 3; //default one
CreateCurrentFont(); // we're selecting default font into
// we're not using GetCharWidth/Height() because of
// differences under X and win
wxCoord w,h;
m_DC->GetTextExtent( wxT("H"), &w, &h);
m_CharWidth = w;
m_CharHeight = h;
m_UseLink = false;
m_Link = wxHtmlLinkInfo( wxEmptyString );
m_LinkColor.Set(0, 0, 0xFF);
m_ActualColor.Set(0, 0, 0);
m_Align = wxHTML_ALIGN_LEFT;
m_ScriptMode = wxHTML_SCRIPT_NORMAL;
m_ScriptBaseline = 0;
m_tmpLastWasSpace = false;
m_lastWordCell = NULL;
// open the toplevel container that contains everything else and that
// is never closed (this makes parser's life easier):
OpenContainer();
// then open the first container into which page's content will go:
OpenContainer();
#if !wxUSE_UNICODE
wxString charset = ExtractCharsetInformation(source);
if (!charset.empty())
{
wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset);
if (enc != wxFONTENCODING_SYSTEM)
SetInputEncoding(enc);
}
#endif
m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
wxColour windowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ;
m_Container->InsertCell
(
new wxHtmlColourCell
(
m_windowInterface
? m_windowInterface->GetHTMLBackgroundColour()
: windowColour,
wxHTML_CLR_BACKGROUND
)
);
m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
}
void wxHtmlWinParser::DoneParser()
{
m_Container = NULL;
#if !wxUSE_UNICODE
SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
#endif
wxHtmlParser::DoneParser();
}
#if WXWIN_COMPATIBILITY_2_6
wxHtmlWindow *wxHtmlWinParser::GetWindow()
{
if (!m_windowInterface)
return NULL;
return wxDynamicCast(m_windowInterface->GetHTMLWindow(), wxHtmlWindow);
}
#endif
wxObject* wxHtmlWinParser::GetProduct()
{
wxHtmlContainerCell *top;
CloseContainer();
OpenContainer();
top = m_Container;
while (top->GetParent()) top = top->GetParent();
top->RemoveExtraSpacing(true, true);
return top;
}
wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
const wxString& url) const
{
if ( !m_windowInterface )
return wxHtmlParser::OpenURL(type, url);
wxString myurl(url);
wxHtmlOpeningStatus status;
for (;;)
{
wxString myfullurl(myurl);
// consider url as absolute path first
wxURI current(myurl);
myfullurl = current.BuildUnescapedURI();
// if not absolute then ...
if( current.IsReference() )
{
wxString basepath = GetFS()->GetPath();
wxURI base(basepath);
// ... try to apply base path if valid ...
if( !base.IsReference() )
{
wxURI path(myfullurl);
path.Resolve( base );
myfullurl = path.BuildUnescapedURI();
}
else
{
// ... or force such addition if not included already
if( !current.GetPath().Contains(base.GetPath()) )
{
basepath += myurl;
wxURI connected( basepath );
myfullurl = connected.BuildUnescapedURI();
}
}
}
wxString redirect;
status = m_windowInterface->OnHTMLOpeningURL(type, myfullurl, &redirect);
if ( status != wxHTML_REDIRECT )
break;
myurl = redirect;
}
if ( status == wxHTML_BLOCK )
return NULL;
int flags = wxFS_READ;
if (type == wxHTML_URL_IMAGE)
flags |= wxFS_SEEKABLE;
return GetFS()->OpenFile(myurl, flags);
}
#define NBSP_UNICODE_VALUE (wxChar(160))
#if !wxUSE_UNICODE
#define CUR_NBSP_VALUE m_nbsp
#else
#define CUR_NBSP_VALUE NBSP_UNICODE_VALUE
#endif
void wxHtmlWinParser::AddText(const wxString& txt)
{
#if !wxUSE_UNICODE
if ( m_nbsp == 0 )
m_nbsp = GetEntitiesParser()->GetCharForCode(NBSP_UNICODE_VALUE);
#endif
if ( m_whitespaceMode == Whitespace_Normal )
{
int templen = 0;
size_t lng = txt.length();
if (lng+1 > m_tmpStrBufSize)
{
delete[] m_tmpStrBuf;
m_tmpStrBuf = new wxChar[lng+1];
m_tmpStrBufSize = lng+1;
}
wxChar *temp = m_tmpStrBuf;
wxString::const_iterator i = txt.begin();
const wxString::const_iterator end = txt.end();
if (m_tmpLastWasSpace)
{
while ( (i < end) &&
(*i == wxT('\n') || *i == wxT('\r') || *i == wxT(' ') ||
*i == wxT('\t')) )
{
++i;
}
}
while (i < end)
{
size_t x = 0;
const wxChar d = temp[templen++] = *i;
if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
{
++i, ++x;
while ( (i < end) &&
(*i == wxT('\n') || *i == wxT('\r') ||
*i == wxT(' ') || *i == wxT('\t')) )
{
++i;
++x;
}
}
else
{
++i;
}
if (x)
{
temp[templen-1] = wxT(' ');
FlushWordBuf(temp, templen);
m_tmpLastWasSpace = true;
}
}
if (templen && (templen > 1 || temp[0] != wxT(' ')))
{
FlushWordBuf(temp, templen);
m_tmpLastWasSpace = false;
}
}
else // m_whitespaceMode == Whitespace_Pre
{
if ( txt.find(CUR_NBSP_VALUE) != wxString::npos )
{
// we need to substitute spaces for &nbsp; here just like we
// did in the Whitespace_Normal branch above
wxString txt2(txt);
txt2.Replace(CUR_NBSP_VALUE, ' ');
AddPreBlock(txt2);
}
else
{
AddPreBlock(txt);
}
// don't eat any whitespace in <pre> block
m_tmpLastWasSpace = false;
}
}
void wxHtmlWinParser::FlushWordBuf(wxChar *buf, int& len)
{
buf[len] = 0;
for ( int i = 0; i < len; i++ )
{
if ( buf[i] == CUR_NBSP_VALUE )
buf[i] = ' ';
}
#if !wxUSE_UNICODE
if (m_EncConv)
m_EncConv->Convert(buf);
#endif
AddWord(wxString(buf, len));
len = 0;
}
void wxHtmlWinParser::AddWord(wxHtmlWordCell *word)
{
ApplyStateToCell(word);
m_Container->InsertCell(word);
word->SetPreviousWord(m_lastWordCell);
m_lastWordCell = word;
}
void wxHtmlWinParser::AddPreBlock(const wxString& text)
{
if ( text.find('\t') != wxString::npos )
{
wxString text2;
text2.reserve(text.length());
const wxString::const_iterator end = text.end();
wxString::const_iterator copyFrom = text.begin();
size_t pos = 0;
int posColumn = m_posColumn;
for ( wxString::const_iterator i = copyFrom; i != end; ++i, ++pos )
{
if ( *i == '\t' )
{
if ( copyFrom != i )
text2.append(copyFrom, i);
const unsigned SPACES_PER_TAB = 8;
const size_t expandTo = SPACES_PER_TAB - posColumn % SPACES_PER_TAB;
text2.append(expandTo, ' ');
posColumn += expandTo;
copyFrom = i + 1;
}
else
{
++posColumn;
}
}
if ( copyFrom != text.end() )
text2.append(copyFrom, text.end());
AddWord(new wxHtmlWordWithTabsCell(text2, text, m_posColumn, *(GetDC())));
m_posColumn = posColumn;
}
else
{
// no special formatting needed
AddWord(text);
m_posColumn += text.length();
}
}
wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
{
m_Container = new wxHtmlContainerCell(m_Container);
m_Container->SetAlignHor(m_Align);
m_posColumn = 0;
m_tmpLastWasSpace = true;
/* to avoid space being first character in paragraph */
return m_Container;
}
wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
{
m_tmpLastWasSpace = true;
/* to avoid space being first character in paragraph */
return m_Container = c;
}
wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
{
m_Container = m_Container->GetParent();
return m_Container;
}
void wxHtmlWinParser::SetFontSize(int s)
{
if (s < 1)
s = 1;
else if (s > 7)
s = 7;
m_FontSize = s;
}
void wxHtmlWinParser::SetDC(wxDC *dc, double pixel_scale, double font_scale)
{
m_DC = dc;
m_PixelScale = pixel_scale;
m_FontScale = font_scale;
}
wxFont* wxHtmlWinParser::CreateCurrentFont()
{
int fb = GetFontBold(),
fi = GetFontItalic(),
fu = GetFontUnderlined(),
ff = GetFontFixed(),
fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
#if !wxUSE_UNICODE
wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
#endif
if (*fontptr != NULL && (*faceptr != face
#if !wxUSE_UNICODE
|| *encptr != m_OutputEnc
#endif
))
{
delete *fontptr;
*fontptr = NULL;
}
if (*fontptr == NULL)
{
*faceptr = face;
*fontptr = new wxFont(
(int) (m_FontsSizes[fs] * m_FontScale),
ff ? wxMODERN : wxSWISS,
fi ? wxITALIC : wxNORMAL,
fb ? wxBOLD : wxNORMAL,
fu ? true : false, face
#if wxUSE_UNICODE
);
#else
, m_OutputEnc);
*encptr = m_OutputEnc;
#endif
}
m_DC->SetFont(**fontptr);
return (*fontptr);
}
void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
{
m_Link = link;
m_UseLink = (link.GetHref() != wxEmptyString);
}
void wxHtmlWinParser::SetFontFace(const wxString& face)
{
if (GetFontFixed())
m_FontFaceFixed = face;
else
m_FontFaceNormal = face;
#if !wxUSE_UNICODE
if (m_InputEnc != wxFONTENCODING_DEFAULT)
SetInputEncoding(m_InputEnc);
#endif
}
void wxHtmlWinParser::ApplyStateToCell(wxHtmlCell *cell)
{
// set the link:
if (m_UseLink)
cell->SetLink(GetLink());
// apply current script mode settings:
cell->SetScriptMode(GetScriptMode(), GetScriptBaseline());
}
#if !wxUSE_UNICODE
void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
{
// the character used for non-breakable space may change:
m_nbsp = 0;
m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
if (m_EncConv)
{
delete m_EncConv;
m_EncConv = NULL;
}
if (enc == wxFONTENCODING_DEFAULT)
return;
wxFontEncoding altfix, altnorm;
bool availfix, availnorm;
availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
if (availnorm && availfix)
{
// exact match?
m_OutputEnc = enc;
}
else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false) &&
wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, false) &&
altnorm == altfix)
{
// alternatives?
m_OutputEnc = altnorm;
}
else if (availnorm)
{
// at least normal face?
m_OutputEnc = enc;
}
else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false))
{
m_OutputEnc = altnorm;
}
else
{
#ifndef __WXMAC__
// okay, let's convert to ISO_8859-1, available always
m_OutputEnc = wxFONTENCODING_DEFAULT;
#else
m_OutputEnc = wxLocale::GetSystemEncoding() ;
#endif
}
m_InputEnc = enc;
if (m_OutputEnc == wxFONTENCODING_DEFAULT)
{
GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
}
else
{
GetEntitiesParser()->SetEncoding(m_OutputEnc);
}
if (m_InputEnc == m_OutputEnc)
return;
m_EncConv = new wxEncodingConverter();
if (!m_EncConv->Init(m_InputEnc,
(m_OutputEnc == wxFONTENCODING_DEFAULT) ?
wxFONTENCODING_ISO8859_1 : m_OutputEnc,
wxCONVERT_SUBSTITUTE))
{ // total failure :-(
wxLogError(_("Failed to display HTML document in %s encoding"),
wxFontMapper::GetEncodingName(enc).c_str());
m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
delete m_EncConv;
m_EncConv = NULL;
}
}
#endif
//-----------------------------------------------------------------------------
// wxHtmlWinTagHandler
//-----------------------------------------------------------------------------
IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
//-----------------------------------------------------------------------------
// wxHtmlTagsModule
//-----------------------------------------------------------------------------
// NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
// This module is an ancestor for tag handlers modules defined
// in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
//
// Do not add any winpars.cpp shutdown or initialization code to it,
// create a new module instead!
IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
bool wxHtmlTagsModule::OnInit()
{
wxHtmlWinParser::AddModule(this);
return true;
}
void wxHtmlTagsModule::OnExit()
{
wxHtmlWinParser::RemoveModule(this);
}
#endif
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