Eliminate a warning

[wxWidgets.git] / src / html / helpdata.cpp

diff --git a/src/html/helpdata.cpp b/src/html/helpdata.cpp
index b3c25e134dcfe59acaa89b72d089522b8a879fe8..0e8bc843df64bbbdbf9a6e3f5ff0b66e1b867916 100644 (file)
--- a/src/html/helpdata.cpp
+++ b/src/html/helpdata.cpp
@@ -1,79 +1,114 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        helpdata.cpp
+// Name:        src/html/helpdata.cpp

 // Purpose:     wxHtmlHelpData
 // Notes:       Based on htmlhelp.cpp, implementing a monolithic
 //              HTML Help controller class,  by Vaclav Slavik
 // Author:      Harm van der Heijden and Vaclav Slavik
 // Purpose:     wxHtmlHelpData
 // Notes:       Based on htmlhelp.cpp, implementing a monolithic
 //              HTML Help controller class,  by Vaclav Slavik
 // Author:      Harm van der Heijden and Vaclav Slavik

-// Created:
-// RCS-ID:
+// RCS-ID:      $Id$

 // Copyright:   (c) Harm van der Heijden and Vaclav Slavik
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Copyright:   (c) Harm van der Heijden and Vaclav Slavik
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-#pragma implementation "helpdata.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

-#include "wx/defs.h"
-
-#if wxUSE_HTML
+#if wxUSE_HTML && wxUSE_STREAMS

 
 

-#ifndef WXPRECOMP
-#include "wx/wx.h"
+#ifndef WX_PRECOMP
+    #include "wx/intl.h"
+    #include "wx/log.h"

 #endif
 
 #endif
 

+#include <ctype.h>
+

 #include "wx/html/helpdata.h"
 #include "wx/tokenzr.h"
 #include "wx/wfstream.h"
 #include "wx/busyinfo.h"
 #include "wx/html/helpdata.h"
 #include "wx/tokenzr.h"
 #include "wx/wfstream.h"
 #include "wx/busyinfo.h"

-#include "wx/html/htmlparser.h"
+#include "wx/encconv.h"
+#include "wx/fontmap.h"
+#include "wx/html/htmlpars.h"

 #include "wx/html/htmldefs.h"
 #include "wx/html/htmldefs.h"

+#include "wx/html/htmlfilt.h"
+#include "wx/filename.h"

 
 #include "wx/arrimpl.cpp"
 WX_DEFINE_OBJARRAY(wxHtmlBookRecArray)
 
 #include "wx/arrimpl.cpp"
 WX_DEFINE_OBJARRAY(wxHtmlBookRecArray)

+WX_DEFINE_OBJARRAY(wxHtmlHelpDataItems)

 
 //-----------------------------------------------------------------------------
 // static helper functions
 //-----------------------------------------------------------------------------
 
 // Reads one line, stores it into buf and returns pointer to new line or NULL.
 
 //-----------------------------------------------------------------------------
 // static helper functions
 //-----------------------------------------------------------------------------
 
 // Reads one line, stores it into buf and returns pointer to new line or NULL.

-static char* ReadLine(char *line, char *buf)
+static const wxChar* ReadLine(const wxChar *line, wxChar *buf, size_t bufsize)

 {
 {

-    char *writeptr = buf, *readptr = line;
+    wxChar *writeptr = buf;
+    wxChar *endptr = buf + bufsize - 1;
+    const wxChar *readptr = line;

 
 

-    while (*readptr != 0 && *readptr != '\r' && *readptr != '\n') *(writeptr++) = *(readptr++);
+    while (*readptr != 0 && *readptr != _T('\r') && *readptr != _T('\n') &&
+           writeptr != endptr)
+        *(writeptr++) = *(readptr++);

     *writeptr = 0;
     *writeptr = 0;

-    while (*readptr == '\r' || *readptr == '\n') readptr++;
-    if (*readptr == 0) return NULL;
-    else return readptr;
+    while (*readptr == _T('\r') || *readptr == _T('\n'))
+        readptr++;
+    if (*readptr == 0)
+        return NULL;
+    else
+        return readptr;

 }
 
 
 }
 
 

-static wxString SafeFileName(const wxString& s)
+
+static int
+wxHtmlHelpIndexCompareFunc(wxHtmlHelpDataItem **a, wxHtmlHelpDataItem **b)

 {
 {

-    wxString res = s;
-    res.Replace(":", "_", TRUE);
-    res.Replace(" ", "_", TRUE);
-    res.Replace("/", "_", TRUE);
-    res.Replace("\\", "_", TRUE);
-    res.Replace("#", "_", TRUE);
-    res.Replace(".", "_", TRUE);
-    return res;
-}
+    wxHtmlHelpDataItem *ia = *a;
+    wxHtmlHelpDataItem *ib = *b;

 
 

+    if (ia == NULL)
+        return -1;
+    if (ib == NULL)
+        return 1;

 
 

-static int IndexCompareFunc(const void *a, const void *b)
-{
-    return strcmp(((wxHtmlContentsItem*)a) -> m_Name, ((wxHtmlContentsItem*)b) -> m_Name);
-}
+    if (ia->parent == ib->parent)
+    {
+        return ia->name.CmpNoCase(ib->name);
+    }
+    else if (ia->level == ib->level)
+    {
+        return wxHtmlHelpIndexCompareFunc(&ia->parent, &ib->parent);
+    }
+    else
+    {
+        wxHtmlHelpDataItem *ia2 = ia;
+        wxHtmlHelpDataItem *ib2 = ib;
+
+        while (ia2->level > ib2->level)
+        {
+            ia2 = ia2->parent;
+        }
+        while (ib2->level > ia2->level)
+        {
+            ib2 = ib2->parent;
+        }

 
 

+        wxASSERT(ia2);
+        wxASSERT(ib2);
+        int res = wxHtmlHelpIndexCompareFunc(&ia2, &ib2);
+        if (res != 0)
+            return res;
+        else if (ia->level > ib->level)
+            return 1;
+        else
+            return -1;
+    }
+}

 
 //-----------------------------------------------------------------------------
 // HP_Parser
 
 //-----------------------------------------------------------------------------
 // HP_Parser


@@ -81,9 +116,18 @@ static int IndexCompareFunc(const void *a, const void *b)
 
 class HP_Parser : public wxHtmlParser
 {
 
 class HP_Parser : public wxHtmlParser
 {

-    public:
-        void AddText(const char* text) {}
-        wxObject* GetProduct() {return NULL;}
+public:
+    HP_Parser()
+    {
+        GetEntitiesParser()->SetEncoding(wxFONTENCODING_ISO8859_1);
+    }
+
+    wxObject* GetProduct() { return NULL; }
+
+protected:
+    virtual void AddText(const wxString& WXUNUSED(txt)) {}
+
+    DECLARE_NO_COPY_CLASS(HP_Parser)

 };
 
 
 };
 
 


@@ -94,349 +138,565 @@ class HP_Parser : public wxHtmlParser
 class HP_TagHandler : public wxHtmlTagHandler
 {
     private:
 class HP_TagHandler : public wxHtmlTagHandler
 {
     private:

-        wxString m_Name, m_Page;
-        int m_Level;
-       int m_ID;
-        int m_Index;
-        wxHtmlContentsItem *m_Items;
-        int m_ItemsCnt;
-        wxHtmlBookRecord *m_Book;
+        wxString m_name, m_page;
+        int m_level;
+        int m_id;
+        int m_index;
+        int m_count;
+        wxHtmlHelpDataItem *m_parentItem;
+        wxHtmlBookRecord *m_book;
+
+        wxHtmlHelpDataItems *m_data;

 
     public:
 
     public:

-        HP_TagHandler(wxHtmlBookRecord *b) : wxHtmlTagHandler() {m_Book = b; m_Items = NULL; m_ItemsCnt = 0; m_Name = m_Page = wxEmptyString; m_Level = 0;}
-        wxString GetSupportedTags() {return "UL,OBJECT,PARAM";}
+        HP_TagHandler(wxHtmlBookRecord *b) : wxHtmlTagHandler()
+        {
+            m_data = NULL;
+            m_book = b;
+            m_name = m_page = wxEmptyString;
+            m_level = 0;
+            m_id = wxID_ANY;
+            m_count = 0;
+            m_parentItem = NULL;
+        }
+        wxString GetSupportedTags() { return wxT("UL,OBJECT,PARAM"); }

         bool HandleTag(const wxHtmlTag& tag);
         bool HandleTag(const wxHtmlTag& tag);

-        void WriteOut(wxHtmlContentsItem*& array, int& size);
-        void ReadIn(wxHtmlContentsItem* array, int size);
+
+        void Reset(wxHtmlHelpDataItems& data)
+        {
+            m_data = &data;
+            m_count = 0;
+            m_level = 0;
+            m_parentItem = NULL;
+        }
+
+    DECLARE_NO_COPY_CLASS(HP_TagHandler)

 };
 
 
 bool HP_TagHandler::HandleTag(const wxHtmlTag& tag)
 {
 };
 
 
 bool HP_TagHandler::HandleTag(const wxHtmlTag& tag)
 {

-    if (tag.GetName() == "UL") {
-        m_Level++;
+    if (tag.GetName() == wxT("UL"))
+    {
+        wxHtmlHelpDataItem *oldparent = m_parentItem;
+        m_level++;
+        m_parentItem = (m_count > 0) ? &(*m_data)[m_data->size()-1] : NULL;

         ParseInner(tag);
         ParseInner(tag);

-        m_Level--;
-        return TRUE;
+        m_level--;
+        m_parentItem = oldparent;
+        return true;

     }
     }

-
-    else if (tag.GetName() == "OBJECT") {
-        m_Name = m_Page = wxEmptyString;
+    else if (tag.GetName() == wxT("OBJECT"))
+    {
+        m_name = m_page = wxEmptyString;

         ParseInner(tag);
         ParseInner(tag);

-        if (m_Page != wxEmptyString) {
-            if (m_ItemsCnt % HTML_REALLOC_STEP == 0)
-                m_Items = (wxHtmlContentsItem*) realloc(m_Items, (m_ItemsCnt + HTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
-            m_Items[m_ItemsCnt].m_Level = m_Level;
-            m_Items[m_ItemsCnt].m_ID = m_ID;
-            m_Items[m_ItemsCnt].m_Page = new char[m_Page.Length() + 1];
-            strcpy(m_Items[m_ItemsCnt].m_Page, m_Page.c_str());
-            m_Items[m_ItemsCnt].m_Name = new char [m_Name.Length() + 1];
-            strcpy(m_Items[m_ItemsCnt].m_Name, m_Name.c_str());
-            m_Items[m_ItemsCnt].m_Book = m_Book;
-            m_ItemsCnt++;
+
+#if 0
+         if (!page.IsEmpty())
+        /* Valid HHW's file may contain only two object tags:
+
+           <OBJECT type="text/site properties">
+               <param name="ImageType" value="Folder">
+           </OBJECT>
+
+           or
+
+           <OBJECT type="text/sitemap">
+               <param name="Name" value="main page">
+               <param name="Local" value="another.htm">
+           </OBJECT>
+
+           We're interested in the latter. !page.IsEmpty() is valid
+           condition because text/site properties does not contain Local param
+        */
+#endif
+        if (tag.GetParam(wxT("TYPE")) == wxT("text/sitemap"))
+        {
+            wxHtmlHelpDataItem *item = new wxHtmlHelpDataItem();
+            item->parent = m_parentItem;
+            item->level = m_level;
+            item->id = m_id;
+            item->page = m_page;
+            item->name = m_name;
+
+            item->book = m_book;
+            m_data->Add(item);
+            m_count++;

         }
         }

-        return TRUE;
-    }

 
 

-    else { // "PARAM"
-        if (m_Name == wxEmptyString && tag.GetParam("NAME") == "Name") m_Name = tag.GetParam("VALUE");
-        if (tag.GetParam("NAME") == "Local") m_Page = tag.GetParam("VALUE");
-        if (tag.GetParam("NAME") == "ID") tag.ScanParam("VALUE", "%i", &m_ID);
-        return FALSE;
+        return true;
+    }
+    else
+    { // "PARAM"
+        if (m_name.empty() && tag.GetParam(wxT("NAME")) == wxT("Name"))
+            m_name = tag.GetParam(wxT("VALUE"));
+        if (tag.GetParam(wxT("NAME")) == wxT("Local"))
+            m_page = tag.GetParam(wxT("VALUE"));
+        if (tag.GetParam(wxT("NAME")) == wxT("ID"))
+            tag.GetParamAsInt(wxT("VALUE"), &m_id);
+        return false;

     }
 }
 
 
     }
 }
 
 

+//-----------------------------------------------------------------------------
+// wxHtmlHelpData
+//-----------------------------------------------------------------------------

 
 

-void HP_TagHandler::WriteOut(wxHtmlContentsItem*& array, int& size)
+wxString wxHtmlBookRecord::GetFullPath(const wxString &page) const

 {
 {

-    array = m_Items;
-    size = m_ItemsCnt;
-    m_Items = NULL;
-    m_ItemsCnt = 0;
+    if (wxIsAbsolutePath(page))
+        return page;
+    else
+        return m_BasePath + page;

 }
 
 }
 

-void HP_TagHandler::ReadIn(wxHtmlContentsItem* array, int size)
+wxString wxHtmlHelpDataItem::GetIndentedName() const

 {
 {

-    m_Items = array;
-    m_ItemsCnt = size;
+    wxString s;
+    for (int i = 1; i < level; i++)
+        s << _T("   ");
+    s << name;
+    return s;

 }
 
 }
 

-//-----------------------------------------------------------------------------
-// wxHtmlHelpData
-//-----------------------------------------------------------------------------

 
 IMPLEMENT_DYNAMIC_CLASS(wxHtmlHelpData, wxObject)
 
 wxHtmlHelpData::wxHtmlHelpData()
 {
 
 IMPLEMENT_DYNAMIC_CLASS(wxHtmlHelpData, wxObject)
 
 wxHtmlHelpData::wxHtmlHelpData()
 {

-    m_TempPath = wxEmptyString;
-
-    m_Contents = NULL;
-    m_ContentsCnt = 0;
-    m_Index = NULL;
-    m_IndexCnt = 0;

 }
 
 wxHtmlHelpData::~wxHtmlHelpData()
 {
 }
 
 wxHtmlHelpData::~wxHtmlHelpData()
 {

-    int i;
-
-    m_BookRecords.Empty();
-    if (m_Contents) {
-        for (i = 0; i < m_ContentsCnt; i++) {
-            delete[] m_Contents[i].m_Page;
-            delete[] m_Contents[i].m_Name;
-        }
-        free(m_Contents);
-    }
-    if (m_Index) {
-        for (i = 0; i < m_IndexCnt; i++) {
-            delete[] m_Index[i].m_Page;
-            delete[] m_Index[i].m_Name;
-        }
-        free(m_Index);
-    }

 }
 
 }
 

-bool wxHtmlHelpData::LoadMSProject(wxHtmlBookRecord *book, wxFileSystem& fsys, const wxString& indexfile, const wxString& contentsfile)
+bool wxHtmlHelpData::LoadMSProject(wxHtmlBookRecord *book, wxFileSystem& fsys,
+                                   const wxString& indexfile,
+                                   const wxString& contentsfile)

 {
     wxFSFile *f;
 {
     wxFSFile *f;

-    char *buf;
-    int sz;
+    wxHtmlFilterHTML filter;
+    wxString buf;

     wxString string;
 
     HP_Parser parser;
     HP_TagHandler *handler = new HP_TagHandler(book);
     parser.AddTagHandler(handler);
 
     wxString string;
 
     HP_Parser parser;
     HP_TagHandler *handler = new HP_TagHandler(book);
     parser.AddTagHandler(handler);
 

-    f = ( contentsfile.IsEmpty() ? NULL : fsys.OpenFile(contentsfile) );
-    if (f) {
-        sz = f -> GetStream() -> GetSize();
-        buf = new char[sz+1];
-        buf[sz] = 0;
-        f -> GetStream() -> Read(buf, sz);
+    f = ( contentsfile.empty() ? (wxFSFile*) NULL : fsys.OpenFile(contentsfile) );
+    if (f)
+    {
+        buf.clear();
+        buf = filter.ReadFile(*f);

         delete f;
         delete f;

-        handler -> ReadIn(m_Contents, m_ContentsCnt);
+        handler->Reset(m_contents);

         parser.Parse(buf);
         parser.Parse(buf);

-        handler -> WriteOut(m_Contents, m_ContentsCnt);
-        delete[] buf;
+    }
+    else
+    {
+        wxLogError(_("Cannot open contents file: %s"), contentsfile.c_str());

     }
 
     }
 

-    f = ( indexfile.IsEmpty() ? NULL : fsys.OpenFile(indexfile) );
-    if (f) {
-        sz = f -> GetStream() -> GetSize();
-        buf = new  char[sz+1];
-        buf[sz] = 0;
-        f -> GetStream() -> Read(buf, sz);
+    f = ( indexfile.empty() ? (wxFSFile*) NULL : fsys.OpenFile(indexfile) );
+    if (f)
+    {
+        buf.clear();
+        buf = filter.ReadFile(*f);

         delete f;
         delete f;

-        handler -> ReadIn(m_Index, m_IndexCnt);
+        handler->Reset(m_index);

         parser.Parse(buf);
         parser.Parse(buf);

-        handler -> WriteOut(m_Index, m_IndexCnt);
-        delete[] buf;

     }
     }

-    return TRUE;
+    else if (!indexfile.empty())
+    {
+        wxLogError(_("Cannot open index file: %s"), indexfile.c_str());
+    }
+    return true;
+}
+
+inline static void CacheWriteInt32(wxOutputStream *f, wxInt32 value)
+{
+    wxInt32 x = wxINT32_SWAP_ON_BE(value);
+    f->Write(&x, sizeof(x));

 }
 
 }
 

+inline static wxInt32 CacheReadInt32(wxInputStream *f)
+{
+    wxInt32 x;
+    f->Read(&x, sizeof(x));
+    return wxINT32_SWAP_ON_BE(x);
+}
+
+inline static void CacheWriteString(wxOutputStream *f, const wxString& str)
+{
+    const wxWX2MBbuf mbstr = str.mb_str(wxConvUTF8);
+    size_t len = strlen((const char*)mbstr)+1;
+    CacheWriteInt32(f, len);
+    f->Write((const char*)mbstr, len);
+}
+
+inline static wxString CacheReadString(wxInputStream *f)
+{
+    size_t len = (size_t)CacheReadInt32(f);
+    wxCharBuffer str(len-1);
+    f->Read(str.data(), len);
+    return wxString(str, wxConvUTF8);
+}
+
+#define CURRENT_CACHED_BOOK_VERSION     5
+
+// Additional flags to detect incompatibilities of the runtime environment:
+#define CACHED_BOOK_FORMAT_FLAGS \
+                     (wxUSE_UNICODE << 0)
+

 
 bool wxHtmlHelpData::LoadCachedBook(wxHtmlBookRecord *book, wxInputStream *f)
 {
 
 bool wxHtmlHelpData::LoadCachedBook(wxHtmlBookRecord *book, wxInputStream *f)
 {

-    int i, st;
-    int x;
+    int i, st, newsize;
+    wxInt32 version;
+
+    /* load header - version info : */
+    version = CacheReadInt32(f);
+
+    if (version != CURRENT_CACHED_BOOK_VERSION)
+    {
+        // NB: We can just silently return false here and don't worry about
+        //     it anymore, because AddBookParam will load the MS project in
+        //     absence of (properly versioned) .cached file and automatically
+        //     create new .cached file immediately afterward.
+        return false;
+    }

 
 

-    /* load contents : */
+    if (CacheReadInt32(f) != CACHED_BOOK_FORMAT_FLAGS)
+        return false;

 
 

-    f -> Read(&x, sizeof(x));
-    st = m_ContentsCnt;
-    m_ContentsCnt += x;
-    m_Contents = (wxHtmlContentsItem*) realloc(m_Contents, (m_ContentsCnt / HTML_REALLOC_STEP + 1) * HTML_REALLOC_STEP * sizeof(wxHtmlContentsItem));
-    for (i = st; i < m_ContentsCnt; i++) {
-        f -> Read(&x, sizeof(x));
-        m_Contents[i].m_Level = x;
-        f -> Read(&x, sizeof(x));
-        m_Contents[i].m_ID = x;
-        f -> Read(&x, sizeof(x));
-        m_Contents[i].m_Name = new char[x];
-        f -> Read(m_Contents[i].m_Name, x);
-        f -> Read(&x, sizeof(x));
-        m_Contents[i].m_Page = new char[x];
-        f -> Read(m_Contents[i].m_Page, x);
-        m_Contents[i].m_Book = book;
+    /* load contents : */
+    st = m_contents.size();
+    newsize = st + CacheReadInt32(f);
+    m_contents.Alloc(newsize);
+    for (i = st; i < newsize; i++)
+    {
+        wxHtmlHelpDataItem *item = new wxHtmlHelpDataItem;
+        item->level = CacheReadInt32(f);
+        item->id = CacheReadInt32(f);
+        item->name = CacheReadString(f);
+        item->page = CacheReadString(f);
+        item->book = book;
+        m_contents.Add(item);

     }
 
     /* load index : */
     }
 
     /* load index : */

-
-    f -> Read(&x, sizeof(x));
-    st = m_IndexCnt;
-    m_IndexCnt += x;
-    m_Index = (wxHtmlContentsItem*) realloc(m_Index, (m_IndexCnt / HTML_REALLOC_STEP + 1) * HTML_REALLOC_STEP * sizeof(wxHtmlContentsItem));
-    for (i = st; i < m_IndexCnt; i++) {
-        f -> Read(&x, sizeof(x));
-        m_Index[i].m_Name = new char[x];
-        f -> Read(m_Index[i].m_Name, x);
-        f -> Read(&x, sizeof(x));
-        m_Index[i].m_Page = new char[x];
-        f -> Read(m_Index[i].m_Page, x);
-        m_Index[i].m_Book = book;
-    }
-    return TRUE;
+    st = m_index.size();
+    newsize = st + CacheReadInt32(f);
+    m_index.Alloc(newsize);
+    for (i = st; i < newsize; i++)
+    {
+        wxHtmlHelpDataItem *item = new wxHtmlHelpDataItem;
+        item->name = CacheReadString(f);
+        item->page = CacheReadString(f);
+        item->level = CacheReadInt32(f);
+        item->book = book;
+        int parentShift = CacheReadInt32(f);
+        if (parentShift != 0)
+            item->parent = &m_index[m_index.size() - parentShift];
+        m_index.Add(item);
+    }
+    return true;

 }
 
 
 bool wxHtmlHelpData::SaveCachedBook(wxHtmlBookRecord *book, wxOutputStream *f)
 {
     int i;
 }
 
 
 bool wxHtmlHelpData::SaveCachedBook(wxHtmlBookRecord *book, wxOutputStream *f)
 {
     int i;

-    int x;
+    wxInt32 cnt;

 
 

-    /* save contents : */
+    /* save header - version info : */
+    CacheWriteInt32(f, CURRENT_CACHED_BOOK_VERSION);
+    CacheWriteInt32(f, CACHED_BOOK_FORMAT_FLAGS);

 
 

-    x = 0;
-    for (i = 0; i < m_ContentsCnt; i++) if (m_Contents[i].m_Book == book && m_Contents[i].m_Level > 0) x++;
-    f -> Write(&x, sizeof(x));
-    for (i = 0; i < m_ContentsCnt; i++) {
-        if (m_Contents[i].m_Book != book || m_Contents[i].m_Level == 0) continue;
-        x = m_Contents[i].m_Level;
-        f -> Write(&x, sizeof(x));
-        x = m_Contents[i].m_ID;
-        f -> Write(&x, sizeof(x));
-        x = strlen(m_Contents[i].m_Name) + 1;
-        f -> Write(&x, sizeof(x));
-        f -> Write(m_Contents[i].m_Name, x);
-        x = strlen(m_Contents[i].m_Page) + 1;
-        f -> Write(&x, sizeof(x));
-        f -> Write(m_Contents[i].m_Page, x);
+    /* save contents : */
+    int len = m_contents.size();
+    for (cnt = 0, i = 0; i < len; i++)
+        if (m_contents[i].book == book && m_contents[i].level > 0)
+            cnt++;
+    CacheWriteInt32(f, cnt);
+
+    for (i = 0; i < len; i++)
+    {
+        if (m_contents[i].book != book || m_contents[i].level == 0)
+            continue;
+        CacheWriteInt32(f, m_contents[i].level);
+        CacheWriteInt32(f, m_contents[i].id);
+        CacheWriteString(f, m_contents[i].name);
+        CacheWriteString(f, m_contents[i].page);

     }
 
     /* save index : */
     }
 
     /* save index : */

-
-    x = 0;
-    for (i = 0; i < m_IndexCnt; i++) if (m_Index[i].m_Book == book && m_Index[i].m_Level > 0) x++;
-    f -> Write(&x, sizeof(x));
-    for (i = 0; i < m_IndexCnt; i++) {
-        if (m_Index[i].m_Book != book || m_Index[i].m_Level == 0) continue;
-        x = strlen(m_Index[i].m_Name) + 1;
-        f -> Write(&x, sizeof(x));
-        f -> Write(m_Index[i].m_Name, x);
-        x = strlen(m_Index[i].m_Page) + 1;
-        f -> Write(&x, sizeof(x));
-        f -> Write(m_Index[i].m_Page, x);
-    }
-    return TRUE;
+    len = m_index.size();
+    for (cnt = 0, i = 0; i < len; i++)
+        if (m_index[i].book == book && m_index[i].level > 0)
+            cnt++;
+    CacheWriteInt32(f, cnt);
+
+    for (i = 0; i < len; i++)
+    {
+        if (m_index[i].book != book || m_index[i].level == 0)
+            continue;
+        CacheWriteString(f, m_index[i].name);
+        CacheWriteString(f, m_index[i].page);
+        CacheWriteInt32(f, m_index[i].level);
+        // save distance to parent item, if any:
+        if (m_index[i].parent == NULL)
+        {
+            CacheWriteInt32(f, 0);
+        }
+        else
+        {
+            int cnt2 = 0;
+            wxHtmlHelpDataItem *parent = m_index[i].parent;
+            for (int j = i-1; j >= 0; j--)
+            {
+                if (m_index[j].book == book && m_index[j].level > 0)
+                    cnt2++;
+                if (&m_index[j] == parent)
+                    break;
+            }
+            wxASSERT(cnt2 > 0);
+            CacheWriteInt32(f, cnt2);
+        }
+    }
+    return true;

 }
 
 
 void wxHtmlHelpData::SetTempDir(const wxString& path)
 {
 }
 
 
 void wxHtmlHelpData::SetTempDir(const wxString& path)
 {

-    if (path == wxEmptyString) m_TempPath = path;
-    else {
-       if (wxIsAbsolutePath(path)) m_TempPath = path;
-       else m_TempPath = wxGetCwd() + "/" + path;
-
-       if (m_TempPath[m_TempPath.Length() - 1] != '/')
-            m_TempPath << "/";
+    if (path.empty())
+        m_tempPath = path;
+    else
+    {
+        if (wxIsAbsolutePath(path)) m_tempPath = path;
+        else m_tempPath = wxGetCwd() + _T("/") + path;
+
+        if (m_tempPath[m_tempPath.length() - 1] != _T('/'))
+            m_tempPath << _T('/');

     }
 }
 
 
     }
 }
 
 

-bool wxHtmlHelpData::AddBookParam(const wxString& title, const wxString& contfile,
-                                 const wxString& indexfile, const wxString& deftopic,
-                                 const wxString& path)
+
+static wxString SafeFileName(const wxString& s)
+{
+    wxString res(s);
+    res.Replace(wxT("#"), wxT("_"));
+    res.Replace(wxT(":"), wxT("_"));
+    res.Replace(wxT("\\"), wxT("_"));
+    res.Replace(wxT("/"), wxT("_"));
+    return res;
+}
+
+bool wxHtmlHelpData::AddBookParam(const wxFSFile& bookfile,
+                                  wxFontEncoding encoding,
+                                  const wxString& title, const wxString& contfile,
+                                  const wxString& indexfile, const wxString& deftopic,
+                                  const wxString& path)

 {
     wxFileSystem fsys;
     wxFSFile *fi;
     wxHtmlBookRecord *bookr;
 {
     wxFileSystem fsys;
     wxFSFile *fi;
     wxHtmlBookRecord *bookr;

-    wxString safetitle;

 
 

-    if (! path.IsEmpty())
-           // workaround for bug in ChangePathTo(name, TRUE)
-           fsys.ChangePathTo(path+"/gaga");
+    int IndexOld = m_index.size(),
+        ContentsOld = m_contents.size();
+
+    if (!path.empty())
+        fsys.ChangePathTo(path, true);

 
 

-    bookr = new wxHtmlBookRecord(path+'/', title, deftopic);
+    size_t booksCnt = m_bookRecords.GetCount();
+    for (size_t i = 0; i < booksCnt; i++)
+    {
+        if ( m_bookRecords[i].GetBookFile() == bookfile.GetLocation() )
+            return true; // book is (was) loaded
+    }
+
+    bookr = new wxHtmlBookRecord(bookfile.GetLocation(), fsys.GetPath(), title, deftopic);

 
 

-    if (m_ContentsCnt % HTML_REALLOC_STEP == 0)
-        m_Contents = (wxHtmlContentsItem*) realloc(m_Contents, (m_ContentsCnt + HTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
-    m_Contents[m_ContentsCnt].m_Level = 0;
-    m_Contents[m_ContentsCnt].m_ID = 0;
-    m_Contents[m_ContentsCnt].m_Page = new char[deftopic.Length() + 1];
-    strcpy(m_Contents[m_ContentsCnt].m_Page, deftopic.c_str());
-    m_Contents[m_ContentsCnt].m_Name = new char [title.Length() + 1];
-    strcpy(m_Contents[m_ContentsCnt].m_Name, title.c_str());
-    m_Contents[m_ContentsCnt].m_Book = bookr;
+    wxHtmlHelpDataItem *bookitem = new wxHtmlHelpDataItem;
+    bookitem->level = 0;
+    bookitem->id = 0;
+    bookitem->page = deftopic;
+    bookitem->name = title;
+    bookitem->book = bookr;

 
     // store the contents index for later
 
     // store the contents index for later

-    int cont_start = m_ContentsCnt++;
+    int cont_start = m_contents.size();
+
+    m_contents.Add(bookitem);

 
     // Try to find cached binary versions:
 
     // Try to find cached binary versions:

-    safetitle = SafeFileName(title);
-    fi = fsys.OpenFile(safetitle + ".cached");
-    if (fi == NULL) fi = fsys.OpenFile(m_TempPath + safetitle + ".cached");
-    if ((fi == NULL) || (m_TempPath == wxEmptyString)) {
-        LoadMSProject(bookr, fsys, indexfile, contfile);
-        if (m_TempPath != wxEmptyString) {
-               wxFileOutputStream *outs = new wxFileOutputStream(m_TempPath + safetitle + ".cached");
-            SaveCachedBook(bookr, outs);
-            delete outs;
-       }
-    }
-    else {
-        LoadCachedBook(bookr, fi -> GetStream());
-        delete fi;
+    // 1. save file as book, but with .hhp.cached extension
+    // 2. same as 1. but in temp path
+    // 3. otherwise or if cache load failed, load it from MS.
+
+    fi = fsys.OpenFile(bookfile.GetLocation() + wxT(".cached"));
+
+    if (fi == NULL ||
+#if wxUSE_DATETIME
+          fi->GetModificationTime() < bookfile.GetModificationTime() ||
+#endif // wxUSE_DATETIME
+          !LoadCachedBook(bookr, fi->GetStream()))
+    {
+        if (fi != NULL) delete fi;
+        fi = fsys.OpenFile(m_tempPath + wxFileNameFromPath(bookfile.GetLocation()) + wxT(".cached"));
+        if (m_tempPath.empty() || fi == NULL ||
+#if wxUSE_DATETIME
+            fi->GetModificationTime() < bookfile.GetModificationTime() ||
+#endif // wxUSE_DATETIME
+            !LoadCachedBook(bookr, fi->GetStream()))
+        {
+            LoadMSProject(bookr, fsys, indexfile, contfile);
+            if (!m_tempPath.empty())
+            {
+                wxFileOutputStream *outs = new wxFileOutputStream(m_tempPath +
+                                                  SafeFileName(wxFileNameFromPath(bookfile.GetLocation())) + wxT(".cached"));
+                SaveCachedBook(bookr, outs);
+                delete outs;
+            }
+        }

     }
 
     }
 

-    // Now store the contents range
-    bookr->SetContentsRange(cont_start, m_ContentsCnt);
+    if (fi != NULL) delete fi;

 
 

-    m_BookRecords.Add(bookr);
-    if (m_IndexCnt > 0)
-        qsort(m_Index, m_IndexCnt, sizeof(wxHtmlContentsItem), IndexCompareFunc);
+    // Now store the contents range
+    bookr->SetContentsRange(cont_start, m_contents.size());
+
+#if wxUSE_WCHAR_T
+    // MS HTML Help files [written by MS HTML Help Workshop] are broken
+    // in that the data are iso-8859-1 (including HTML entities), but must
+    // be interpreted as being in language's windows charset. Correct the
+    // differences here and also convert to wxConvLocal in ANSI build
+    if (encoding != wxFONTENCODING_SYSTEM)
+    {
+        #if wxUSE_UNICODE
+            #define CORRECT_STR(str, conv) \
+                str = wxString((str).mb_str(wxConvISO8859_1), conv)
+        #else
+            #define CORRECT_STR(str, conv) \
+                str = wxString((str).wc_str(conv), wxConvLocal)
+        #endif
+        wxCSConv conv(encoding);
+        size_t IndexCnt = m_index.size();
+        size_t ContentsCnt = m_contents.size();
+        size_t i;
+        for (i = IndexOld; i < IndexCnt; i++)
+        {
+            CORRECT_STR(m_index[i].name, conv);
+        }
+        for (i = ContentsOld; i < ContentsCnt; i++)
+        {
+            CORRECT_STR(m_contents[i].name, conv);
+        }
+        #undef CORRECT_STR
+    }
+#else
+    wxUnusedVar(IndexOld);
+    wxUnusedVar(ContentsOld);
+    wxASSERT_MSG(encoding == wxFONTENCODING_SYSTEM, wxT("Help files need charset conversion, but wxUSE_WCHAR_T is 0"));
+#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
+
+    m_bookRecords.Add(bookr);
+    if (!m_index.empty())
+    {
+        m_index.Sort(wxHtmlHelpIndexCompareFunc);
+    }

 
 

-    return TRUE;
+    return true;

 }
 
 
 bool wxHtmlHelpData::AddBook(const wxString& book)
 {
 }
 
 
 bool wxHtmlHelpData::AddBook(const wxString& book)
 {

+    wxString extension(book.Right(4).Lower());
+    if (extension == wxT(".zip") ||
+#if wxUSE_LIBMSPACK
+        extension == wxT(".chm") /*compressed html help book*/ ||
+#endif
+        extension == wxT(".htb") /*html book*/)
+    {
+        wxFileSystem fsys;
+        wxString s;
+        bool rt = false;
+
+#if wxUSE_LIBMSPACK
+        if (extension == wxT(".chm"))
+            s = fsys.FindFirst(book + wxT("#chm:*.hhp"), wxFILE);
+        else
+#endif
+            s = fsys.FindFirst(book + wxT("#zip:*.hhp"), wxFILE);
+
+        while (!s.empty())
+        {
+            if (AddBook(s)) rt = true;
+            s = fsys.FindNext();
+        }
+
+        return rt;
+    }
+

     wxFSFile *fi;
     wxFileSystem fsys;
     wxFSFile *fi;
     wxFileSystem fsys;

-    wxInputStream *s;
-    wxString bookFull;
-
-    int sz;
-    char *buff, *lineptr;
-    char linebuf[300];

 
     wxString title = _("noname"),
              safetitle,
              start = wxEmptyString,
 
     wxString title = _("noname"),
              safetitle,
              start = wxEmptyString,

-             contents = wxEmptyString, index = wxEmptyString;
-
-    if (wxIsAbsolutePath(book)) bookFull = book;
-    else bookFull = wxGetCwd() + "/" + book;
-
-    fi = fsys.OpenFile(bookFull);
-    if (fi == NULL) return FALSE;
-    fsys.ChangePathTo(bookFull);
-    s = fi -> GetStream();
-    sz = s -> GetSize();
-    buff = new char[sz+1];
-    buff[sz] = 0;
-    s -> Read(buff, sz);
-    lineptr = buff;
-    delete fi;
-
-    while ((lineptr = ReadLine(lineptr, linebuf)) != NULL) {
-        if (strstr(linebuf, "Title=") == linebuf)
-            title = linebuf + strlen("Title=");
-        if (strstr(linebuf, "Default topic=") == linebuf)
-            start = linebuf + strlen("Default topic=");
-        if (strstr(linebuf, "Index file=") == linebuf)
-            index = linebuf + strlen("Index file=");
-        if (strstr(linebuf, "Contents file=") == linebuf)
-            contents = linebuf + strlen("Contents file=");
+             contents = wxEmptyString,
+             index = wxEmptyString,
+             charset = wxEmptyString;
+
+    fi = fsys.OpenFile(book);
+    if (fi == NULL)
+    {
+        wxLogError(_("Cannot open HTML help book: %s"), book.c_str());
+        return false;

     }
     }

-    delete[] buff;
+    fsys.ChangePathTo(book);
+
+    const wxChar *lineptr;
+    wxChar linebuf[300];
+    wxString tmp;
+    wxHtmlFilterPlainText filter;
+    tmp = filter.ReadFile(*fi);
+    lineptr = tmp.c_str();
+
+    do
+    {
+        lineptr = ReadLine(lineptr, linebuf, 300);
+
+        for (wxChar *ch = linebuf; *ch != wxT('\0') && *ch != wxT('='); ch++)
+           *ch = (wxChar)wxTolower(*ch);
+
+        if (wxStrstr(linebuf, _T("title=")) == linebuf)
+            title = linebuf + wxStrlen(_T("title="));
+        if (wxStrstr(linebuf, _T("default topic=")) == linebuf)
+            start = linebuf + wxStrlen(_T("default topic="));
+        if (wxStrstr(linebuf, _T("index file=")) == linebuf)
+            index = linebuf + wxStrlen(_T("index file="));
+        if (wxStrstr(linebuf, _T("contents file=")) == linebuf)
+            contents = linebuf + wxStrlen(_T("contents file="));
+        if (wxStrstr(linebuf, _T("charset=")) == linebuf)
+            charset = linebuf + wxStrlen(_T("charset="));
+    } while (lineptr != NULL);
+
+    wxFontEncoding enc = wxFONTENCODING_SYSTEM;
+#if wxUSE_FONTMAP
+    if (charset != wxEmptyString)
+        enc = wxFontMapper::Get()->CharsetToEncoding(charset);
+#endif

 
 

-    return AddBookParam(title, contents, index, start, fsys.GetPath());
+    bool rtval = AddBookParam(*fi, enc,
+                              title, contents, index, start, fsys.GetPath());
+    delete fi;
+
+    return rtval;

 }
 
 wxString wxHtmlHelpData::FindPageByName(const wxString& x)
 }
 
 wxString wxHtmlHelpData::FindPageByName(const wxString& x)


@@ -445,133 +705,269 @@ wxString wxHtmlHelpData::FindPageByName(const wxString& x)
     int i;
     wxFileSystem fsys;
     wxFSFile *f;
     int i;
     wxFileSystem fsys;
     wxFSFile *f;

-    wxString url(wxEmptyString);
-
-    /* 1. try to open given file: */

 
 

-    cnt = m_BookRecords.GetCount();
-    for (i = 0; i < cnt; i++) {
-        f = fsys.OpenFile(m_BookRecords[i].GetBasePath() + x);
-        if (f) {
-            url = m_BookRecords[i].GetBasePath() + x;
+    // 1. try to open given file:
+    cnt = m_bookRecords.GetCount();
+    for (i = 0; i < cnt; i++)
+    {
+        f = fsys.OpenFile(m_bookRecords[i].GetFullPath(x));
+        if (f)
+        {
+            wxString url = m_bookRecords[i].GetFullPath(x);

             delete f;
             return url;
         }
     }
 
 
             delete f;
             return url;
         }
     }
 
 

-    /* 2. try to find a book: */
-
-    for (i = 0; i < cnt; i++) {
-        if (m_BookRecords[i].GetTitle() == x) {
-            url = m_BookRecords[i].GetBasePath() + m_BookRecords[i].GetStart();
-            return url;
-        }
+    // 2. try to find a book:
+    for (i = 0; i < cnt; i++)
+    {
+        if (m_bookRecords[i].GetTitle() == x)
+            return m_bookRecords[i].GetFullPath(m_bookRecords[i].GetStart());

     }
 
     }
 

-    /* 3. try to find in contents: */
-
-    cnt = m_ContentsCnt;
-    for (i = 0; i < cnt; i++) {
-        if (strcmp(m_Contents[i].m_Name, x) == 0) {
-            url = m_Contents[i].m_Book -> GetBasePath() + m_Contents[i].m_Page;
-            return url;
-        }
+    // 3. try to find in contents:
+    cnt = m_contents.size();
+    for (i = 0; i < cnt; i++)
+    {
+        if (m_contents[i].name == x)
+            return m_contents[i].GetFullPath();

     }
 
 
     }
 
 

-    /* 4. try to find in index: */
+    // 4. try to find in index:
+    cnt = m_index.size();
+    for (i = 0; i < cnt; i++)
+    {
+        if (m_index[i].name == x)
+            return m_index[i].GetFullPath();
+    }

 
 

-    cnt = m_IndexCnt;
-    for (i = 0; i < cnt; i++) {
-        if (strcmp(m_Index[i].m_Name, x) == 0) {
-            url = m_Index[i].m_Book -> GetBasePath() + m_Index[i].m_Page;
-            return url;
-        }
+    // 4b. if still not found, try case-insensitive comparison
+    for (i = 0; i < cnt; i++)
+    {
+        if (m_index[i].name.CmpNoCase(x) == 0)
+            return m_index[i].GetFullPath();

     }
 
     }
 

-    return url;
+    return wxEmptyString;

 }
 
 wxString wxHtmlHelpData::FindPageById(int id)
 {
 }
 
 wxString wxHtmlHelpData::FindPageById(int id)
 {

-    int i;
-    wxString url(wxEmptyString);
-
-    for (i = 0; i < m_ContentsCnt; i++) {
-        if (m_Contents[i].m_ID == id) {
-            url = m_Contents[i].m_Book -> GetBasePath() + m_Contents[i].m_Page;
-            return url;
+    size_t cnt = m_contents.size();
+    for (size_t i = 0; i < cnt; i++)
+    {
+        if (m_contents[i].id == id)
+        {
+            return m_contents[i].GetFullPath();

         }
     }
 
         }
     }
 

-    return url;
+    return wxEmptyString;

 }
 
 }
 

+

 //----------------------------------------------------------------------------------
 // wxHtmlSearchStatus functions
 //----------------------------------------------------------------------------------
 
 wxHtmlSearchStatus::wxHtmlSearchStatus(wxHtmlHelpData* data, const wxString& keyword,
 //----------------------------------------------------------------------------------
 // wxHtmlSearchStatus functions
 //----------------------------------------------------------------------------------
 
 wxHtmlSearchStatus::wxHtmlSearchStatus(wxHtmlHelpData* data, const wxString& keyword,

-                                      const wxString& book)
+                                       bool case_sensitive, bool whole_words_only,
+                                       const wxString& book)

 {
     m_Data = data;
     m_Keyword = keyword;
     wxHtmlBookRecord* bookr = NULL;
 {
     m_Data = data;
     m_Keyword = keyword;
     wxHtmlBookRecord* bookr = NULL;

-    if (book != wxEmptyString) {
-       // we have to search in a specific book. Find it first
-       int i,cnt = data->m_BookRecords.GetCount();
-       for (i=0; i<cnt; i++)
-           if (data->m_BookRecords[i].GetTitle() == book) {
-               bookr = &(data->m_BookRecords[i]);
-               m_CurIndex = bookr->GetContentsStart();
-               m_MaxIndex = bookr->GetContentsEnd();
-               break;
-           }
-       // check; we won't crash if the book doesn't exist, but it's Bad Anyway.
-       wxASSERT(bookr);
-    }
-    if (! bookr) {
-       // no book specified; search all books
-       m_CurIndex = 0;
-       m_MaxIndex = m_Data->m_ContentsCnt;
-    }
-    m_Engine.LookFor(keyword);
+    if (book != wxEmptyString)
+    {
+        // we have to search in a specific book. Find it first
+        int i, cnt = data->m_bookRecords.GetCount();
+        for (i = 0; i < cnt; i++)
+            if (data->m_bookRecords[i].GetTitle() == book)
+            {
+                bookr = &(data->m_bookRecords[i]);
+                m_CurIndex = bookr->GetContentsStart();
+                m_MaxIndex = bookr->GetContentsEnd();
+                break;
+            }
+        // check; we won't crash if the book doesn't exist, but it's Bad Anyway.
+        wxASSERT(bookr);
+    }
+    if (! bookr)
+    {
+        // no book specified; search all books
+        m_CurIndex = 0;
+        m_MaxIndex = m_Data->m_contents.size();
+    }
+    m_Engine.LookFor(keyword, case_sensitive, whole_words_only);

     m_Active = (m_CurIndex < m_MaxIndex);
     m_Active = (m_CurIndex < m_MaxIndex);

-    m_LastPage = wxEmptyString;

 }
 
 bool wxHtmlSearchStatus::Search()
 {
 }
 
 bool wxHtmlSearchStatus::Search()
 {

-    wxFileSystem fsys;

     wxFSFile *file;
     wxFSFile *file;

-    int i = m_CurIndex; // shortcut
-    bool found = FALSE;
-
-    if (! m_Active) {
-       // sanity check. Illegal use, but we'll try to prevent a crash anyway
-       wxASSERT(0);
-       return FALSE;
+    int i = m_CurIndex;  // shortcut
+    bool found = false;
+    wxString thepage;
+
+    if (!m_Active)
+    {
+        // sanity check. Illegal use, but we'll try to prevent a crash anyway
+        wxASSERT(m_Active);
+        return false;

     }
 
     }
 

-    m_ContentsItem = NULL;

     m_Name = wxEmptyString;
     m_Name = wxEmptyString;

+    m_CurItem = NULL;
+    thepage = m_Data->m_contents[i].page;

 
 

-    file = fsys.OpenFile(m_Data->m_Contents[i].m_Book -> GetBasePath() +
-                        m_Data->m_Contents[i].m_Page);
-    if (file) {
-       if (m_LastPage != file->GetLocation()) {
-           m_LastPage = file->GetLocation();
-           if (m_Engine.Scan(file -> GetStream())) {
-               m_Name = m_Data->m_Contents[i].m_Name;
-               m_ContentsItem = m_Data->m_Contents + i;
-               found = true;
-           }
-       }
-       delete file;
-    }

     m_Active = (++m_CurIndex < m_MaxIndex);
     m_Active = (++m_CurIndex < m_MaxIndex);

+    // check if it is same page with different anchor:
+    if (!m_LastPage.empty())
+    {
+        const wxChar *p1, *p2;
+        for (p1 = thepage.c_str(), p2 = m_LastPage.c_str();
+             *p1 != 0 && *p1 != _T('#') && *p1 == *p2; p1++, p2++) {}
+
+        m_LastPage = thepage;
+
+        if (*p1 == 0 || *p1 == _T('#'))
+            return false;
+    }
+    else m_LastPage = thepage;
+
+    wxFileSystem fsys;
+    file = fsys.OpenFile(m_Data->m_contents[i].book->GetFullPath(thepage));
+    if (file)
+    {
+        if (m_Engine.Scan(*file))
+        {
+            m_Name = m_Data->m_contents[i].name;
+            m_CurItem = &m_Data->m_contents[i];
+            found = true;
+        }
+        delete file;
+    }

     return found;
 }
 
     return found;
 }
 

+
+
+
+
+
+
+
+//--------------------------------------------------------------------------------
+// wxHtmlSearchEngine
+//--------------------------------------------------------------------------------
+
+void wxHtmlSearchEngine::LookFor(const wxString& keyword, bool case_sensitive, bool whole_words_only)
+{
+    m_CaseSensitive = case_sensitive;
+    m_WholeWords = whole_words_only;
+    m_Keyword = keyword;
+
+    if (!m_CaseSensitive)
+        m_Keyword.LowerCase();
+}
+
+
+static inline bool WHITESPACE(wxChar c)
+{
+    return c == _T(' ') || c == _T('\n') || c == _T('\r') || c == _T('\t');
+}
+
+// replace continuous spaces by one single space
+static inline wxString CompressSpaces(const wxString & str)
+{
+    wxString buf;
+    buf.reserve( str.size() );
+
+    bool space_counted = false;
+    for( const wxChar * pstr = str.c_str(); *pstr; ++pstr )
+    {
+        wxChar ch = *pstr;
+        if( WHITESPACE( ch ) )
+        {
+            if( space_counted )
+            {
+                continue;
+            }
+            ch = _T(' ');
+            space_counted = true;
+        }
+        else
+        {
+            space_counted = false;
+        }
+        buf += ch;
+    }
+
+    return buf;
+}
+
+bool wxHtmlSearchEngine::Scan(const wxFSFile& file)
+{
+    wxASSERT_MSG(!m_Keyword.empty(), wxT("wxHtmlSearchEngine::LookFor must be called before scanning!"));
+
+    wxHtmlFilterHTML filter;
+    wxString bufStr = filter.ReadFile(file);
+
+    if (!m_CaseSensitive)
+        bufStr.LowerCase();
+
+    {   // remove html tags
+        wxString bufStrCopy;
+        bufStrCopy.reserve( bufStr.size() );
+        bool insideTag = false;
+        for (const wxChar * pBufStr = bufStr.c_str(); *pBufStr; ++pBufStr)
+        {
+            wxChar c = *pBufStr;
+            if (insideTag)
+            {
+                if (c == _T('>'))
+                {
+                    insideTag = false;
+                    // replace the tag by an empty space
+                    c = _T(' ');
+                }
+                else
+                    continue;
+            }
+            else if (c == _T('<'))
+            {
+                wxChar nextCh = *(pBufStr + 1);
+                if (nextCh == _T('/') || !WHITESPACE(nextCh))
+                {
+                    insideTag = true;
+                    continue;
+                }
+            }
+            bufStrCopy += c;
+        }
+        bufStr.swap( bufStrCopy );
+    }
+
+    wxString keyword = m_Keyword;
+
+    if (m_WholeWords)
+    {
+        // insert ' ' at the beginning and at the end
+        keyword.insert( 0, _T(" ") );
+        keyword.append( _T(" ") );
+        bufStr.insert( 0, _T(" ") );
+        bufStr.append( _T(" ") );
+    }
+
+    // remove continuous spaces
+    keyword = CompressSpaces( keyword );
+    bufStr = CompressSpaces( bufStr );
+
+    // finally do the search
+    return bufStr.find( keyword ) != wxString::npos;
+}
+

 #endif
 #endif