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new wxHtmlParser core and changes implied by it

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11112 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
2001-07-19 22:31:00 +00:00
parent 6c62a62bf7
commit 211dfeddfc
8 changed files with 370 additions and 110 deletions
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290
src/html/htmlpars.cpp
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@@ -32,8 +32,32 @@
#include "wx/fontmap.h"
#include "wx/html/htmldefs.h"
#include "wx/html/htmlpars.h"
#include "wx/dynarray.h"
#include "wx/arrimpl.cpp"
//-----------------------------------------------------------------------------
// wxHtmlParser helpers
//-----------------------------------------------------------------------------
class wxHtmlTextPiece
{
public:
wxHtmlTextPiece(int pos, int lng) : m_pos(pos), m_lng(lng) {}
int m_pos, m_lng;
};
WX_DECLARE_OBJARRAY(wxHtmlTextPiece, wxHtmlTextPieces);
WX_DEFINE_OBJARRAY(wxHtmlTextPieces);
struct wxHtmlParserState
{
wxHtmlTag *m_curTag;
wxHtmlTag *m_tags;
wxHtmlTextPieces *m_textPieces;
int m_curTextPiece;
wxString m_source;
wxHtmlParserState *m_nextState;
};
//-----------------------------------------------------------------------------
// wxHtmlParser
@@ -42,14 +66,21 @@
IMPLEMENT_ABSTRACT_CLASS(wxHtmlParser,wxObject)
wxHtmlParser::wxHtmlParser()
: wxObject(), m_Cache(NULL), m_HandlersHash(wxKEY_STRING),
: wxObject(), m_HandlersHash(wxKEY_STRING),
m_FS(NULL), m_HandlersStack(NULL)
{
m_entitiesParser = new wxHtmlEntitiesParser;
m_Tags = NULL;
m_CurTag = NULL;
m_TextPieces = NULL;
m_CurTextPiece = 0;
m_SavedStates = NULL;
}
wxHtmlParser::~wxHtmlParser()
{
while (RestoreState())
DestroyDOMTree();
delete m_HandlersStack;
m_HandlersHash.Clear();
m_HandlersList.DeleteContents(TRUE);
@@ -75,62 +106,192 @@ void wxHtmlParser::InitParser(const wxString& source)
void wxHtmlParser::DoneParser()
{
delete m_Cache;
m_Cache = NULL;
DestroyDOMTree();
}
void wxHtmlParser::SetSource(const wxString& src)
{
DestroyDOMTree();
m_Source = src;
delete m_Cache;
m_Cache = new wxHtmlTagsCache(m_Source);
CreateDOMTree();
m_CurTag = NULL;
m_CurTextPiece = 0;
}
void wxHtmlParser::CreateDOMTree()
{
wxHtmlTagsCache cache(m_Source);
m_TextPieces = new wxHtmlTextPieces;
CreateDOMSubTree(NULL, 0, m_Source.Length(), &cache);
m_CurTextPiece = 0;
}
void wxHtmlParser::CreateDOMSubTree(wxHtmlTag *cur,
int begin_pos, int end_pos,
wxHtmlTagsCache *cache)
{
if (end_pos <= begin_pos) return;
wxChar c;
int i = begin_pos;
int textBeginning = begin_pos;
while (i < end_pos)
{
c = m_Source.GetChar(i);
if (c == wxT('<'))
{
// add text to m_TextPieces:
if (i - textBeginning > 0)
m_TextPieces->Add(
wxHtmlTextPiece(textBeginning, i - textBeginning));
// if it is a comment, skip it:
if (i < end_pos-6 && m_Source.GetChar(i+1) == wxT('!') &&
m_Source.GetChar(i+2) == wxT('-') &&
m_Source.GetChar(i+3) == wxT('-'))
{
// Comments begin with "<!--" and end with "--[ \t\r\n]*>"
// according to HTML 4.0
int dashes = 0;
i += 4;
while (i < end_pos)
{
c = m_Source.GetChar(i++);
if ((c == wxT(' ') || c == wxT('\n') ||
c == wxT('\r') || c == wxT('\t')) && dashes >= 2) {}
else if (c == wxT('>') && dashes >= 2)
{
textBeginning = i;
break;
}
else if (c == wxT('-'))
dashes++;
else
dashes = 0;
}
}
// add another tag to the tree:
else if (i < end_pos-1 && m_Source.GetChar(i+1) != wxT('/'))
{
wxHtmlTag *chd;
if (cur)
chd = new wxHtmlTag(cur, m_Source,
i, end_pos, cache, m_entitiesParser);
else
{
chd = new wxHtmlTag(NULL, m_Source,
i, end_pos, cache, m_entitiesParser);
if (!m_Tags)
{
// if this is the first tag to be created make the root
// m_Tags point to it:
m_Tags = chd;
}
else
{
// if there is already a root tag add this tag as
// the last sibling:
chd->m_Prev = m_Tags->GetLastSibling();
chd->m_Prev->m_Next = chd;
}
}
if (chd->HasEnding())
{
CreateDOMSubTree(chd,
chd->GetBeginPos(), chd->GetEndPos1(),
cache);
i = chd->GetEndPos2();
}
else
i = chd->GetBeginPos();
textBeginning = i;
}
// ... or skip ending tag:
else
{
while (i < end_pos && m_Source.GetChar(i) != wxT('>')) i++;
textBeginning = i+1;
}
}
else i++;
}
// add remaining text to m_TextPieces:
if (end_pos - textBeginning > 0)
m_TextPieces->Add(
wxHtmlTextPiece(textBeginning, end_pos - textBeginning));
}
void wxHtmlParser::DestroyDOMTree()
{
wxHtmlTag *t1, *t2;
t1 = m_Tags;
while (t1)
{
t2 = t1->GetNextSibling();
delete t1;
t1 = t2;
}
m_Tags = m_CurTag = NULL;
delete m_TextPieces;
m_TextPieces = NULL;
}
void wxHtmlParser::DoParsing()
{
m_CurTag = m_Tags;
m_CurTextPiece = 0;
DoParsing(0, m_Source.Length());
}
void wxHtmlParser::DoParsing(int begin_pos, int end_pos)
{
if (end_pos <= begin_pos) return;
char c;
char *temp = new char[end_pos - begin_pos + 1];
int i;
int templen;
templen = 0;
i = begin_pos;
while (i < end_pos)
wxHtmlTextPieces& pieces = *m_TextPieces;
size_t piecesCnt = pieces.GetCount();
while (begin_pos < end_pos)
{
c = m_Source[(unsigned int) i];
while (m_CurTag && m_CurTag->GetBeginPos() < begin_pos)
m_CurTag = m_CurTag->GetNextTag();
while (m_CurTextPiece < piecesCnt &&
pieces[m_CurTextPiece].m_pos < begin_pos)
m_CurTextPiece++;
// continue building word:
if (c != '<')
{
temp[templen++] = c;
i++;
if (m_CurTextPiece < piecesCnt &&
(!m_CurTag ||
pieces[m_CurTextPiece].m_pos < m_CurTag->GetBeginPos()))
{
// Add text:
AddText(m_Source.Mid(pieces[m_CurTextPiece].m_pos,
pieces[m_CurTextPiece].m_lng));
begin_pos = pieces[m_CurTextPiece].m_pos +
pieces[m_CurTextPiece].m_lng;
m_CurTextPiece++;
}
else if (c == '<')
{
wxHtmlTag tag(m_Source, i, end_pos, m_Cache, m_entitiesParser);
if (templen)
{
temp[templen] = 0;
AddText(temp);
templen = 0;
else if (m_CurTag)
{
// Add tag:
if (m_CurTag)
{
if (m_CurTag->HasEnding())
begin_pos = m_CurTag->GetEndPos2();
else
begin_pos = m_CurTag->GetBeginPos();
}
AddTag(tag);
if (tag.HasEnding()) i = tag.GetEndPos2();
else i = tag.GetBeginPos();
wxHtmlTag *t = m_CurTag;
m_CurTag = m_CurTag->GetNextTag();
AddTag(*t);
}
else break;
}
if (templen)
{ // last word of block :-(
temp[templen] = 0;
AddText(temp);
}
delete[] temp;
}
void wxHtmlParser::AddTag(const wxHtmlTag& tag)
@@ -151,7 +312,7 @@ void wxHtmlParser::AddTag(const wxHtmlTag& tag)
void wxHtmlParser::AddTagHandler(wxHtmlTagHandler *handler)
{
wxString s(handler->GetSupportedTags());
wxStringTokenizer tokenizer(s, ", ");
wxStringTokenizer tokenizer(s, wxT(", "));
while (tokenizer.HasMoreTokens())
m_HandlersHash.Put(tokenizer.NextToken(), handler);
@@ -164,7 +325,7 @@ void wxHtmlParser::AddTagHandler(wxHtmlTagHandler *handler)
void wxHtmlParser::PushTagHandler(wxHtmlTagHandler *handler, wxString tags)
{
wxStringTokenizer tokenizer(tags, ", ");
wxStringTokenizer tokenizer(tags, wxT(", "));
wxString key;
if (m_HandlersStack == NULL)
@@ -197,6 +358,45 @@ void wxHtmlParser::PopTagHandler()
m_HandlersStack->DeleteNode(first);
}
void wxHtmlParser::SetSourceAndSaveState(const wxString& src)
{
wxHtmlParserState *s = new wxHtmlParserState;
s->m_curTag = m_CurTag;
s->m_tags = m_Tags;
s->m_textPieces = m_TextPieces;
s->m_curTextPiece = m_CurTextPiece;
s->m_source = m_Source;
s->m_nextState = m_SavedStates;
m_SavedStates = s;
m_CurTag = NULL;
m_Tags = NULL;
m_TextPieces = NULL;
m_CurTextPiece = 0;
m_Source = wxEmptyString;
SetSource(src);
}
bool wxHtmlParser::RestoreState()
{
if (!m_SavedStates) return FALSE;
wxHtmlParserState *s = m_SavedStates;
m_SavedStates = s->m_nextState;
m_CurTag = s->m_curTag;
m_Tags = s->m_tags;
m_TextPieces = s->m_textPieces;
m_CurTextPiece = s->m_curTextPiece;
m_Source = s->m_source;
delete s;
return TRUE;
}
//-----------------------------------------------------------------------------
// wxHtmlTagHandler
//-----------------------------------------------------------------------------
@@ -256,9 +456,9 @@ wxString wxHtmlEntitiesParser::Parse(const wxString& input)
(*c >= wxT('0') && *c <= wxT('9')) ||
*c == wxT('_') || *c == wxT('#'); c++) {}
entity.append(ent_s, c - ent_s);
if (*c == wxT(';')) c++;
if (*c != wxT(';')) c--;
last = c+1;
output << GetEntityChar(entity);
last = c;
}
}
if (*last != wxT('\0'))