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wxWidgets/src/common/filesys.cpp
Václav Slavík 14f355c2b5 added support for gcc precompiled headers 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22723 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2003-08-09 12:46:53 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: filesys.cpp
// Purpose: wxFileSystem class - interface for opening files
// Author: Vaclav Slavik
// Copyright: (c) 1999 Vaclav Slavik
// CVS-ID: $Id$
// Licence: wxWindows Licence
/////////////////////////////////////////////////////////////////////////////
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "filesys.h"
#endif
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_FILESYSTEM
#include "wx/wfstream.h"
#include "wx/module.h"
#include "wx/filesys.h"
#include "wx/mimetype.h"
#include "wx/filename.h"
#include "wx/log.h"
//--------------------------------------------------------------------------------
// wxFileSystemHandler
//--------------------------------------------------------------------------------
IMPLEMENT_ABSTRACT_CLASS(wxFileSystemHandler, wxObject)
#if wxUSE_MIMETYPE
static wxFileTypeInfo *gs_FSMimeFallbacks = NULL;
#endif
wxString wxFileSystemHandler::GetMimeTypeFromExt(const wxString& location)
{
wxString ext, mime;
wxString loc = GetRightLocation(location);
char c;
int l = loc.Length(), l2;
l2 = l;
for (int i = l-1; i >= 0; i--)
{
c = loc[(unsigned int) i];
if ( c == wxT('#') )
l2 = i + 1;
if ( c == wxT('.') )
{
ext = loc.Right(l2-i-1);
break;
}
if ( (c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':')) )
return wxEmptyString;
}
#if wxUSE_MIMETYPE
static bool s_MinimalMimeEnsured = FALSE;
if (!s_MinimalMimeEnsured) {
wxTheMimeTypesManager->AddFallbacks(gs_FSMimeFallbacks);
s_MinimalMimeEnsured = TRUE;
}
wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
if ( !ft || !ft -> GetMimeType(&mime) )
{
mime = wxEmptyString;
}
delete ft;
return mime;
#else
if ( ext.IsSameAs(wxT("htm"), FALSE) || ext.IsSameAs(_T("html"), FALSE) )
return wxT("text/html");
if ( ext.IsSameAs(wxT("jpg"), FALSE) || ext.IsSameAs(_T("jpeg"), FALSE) )
return wxT("image/jpeg");
if ( ext.IsSameAs(wxT("gif"), FALSE) )
return wxT("image/gif");
if ( ext.IsSameAs(wxT("png"), FALSE) )
return wxT("image/png");
if ( ext.IsSameAs(wxT("bmp"), FALSE) )
return wxT("image/bmp");
return wxEmptyString;
#endif
}
wxString wxFileSystemHandler::GetProtocol(const wxString& location) const
{
wxString s = wxEmptyString;
int i, l = location.Length();
bool fnd;
fnd = FALSE;
for (i = l-1; (i >= 0) && ((location[i] != wxT('#')) || (!fnd)); i--) {
if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = TRUE;
}
if (!fnd) return wxT("file");
for (++i; (i < l) && (location[i] != wxT(':')); i++) s << location[i];
return s;
}
wxString wxFileSystemHandler::GetLeftLocation(const wxString& location) const
{
int i;
bool fnd;
fnd = FALSE;
for (i = location.Length()-1; i >= 0; i--) {
if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = TRUE;
else if (fnd && (location[i] == wxT('#'))) return location.Left(i);
}
return wxEmptyString;
}
wxString wxFileSystemHandler::GetRightLocation(const wxString& location) const
{
int i, l = location.Length();
int l2 = l + 1;
for (i = l-1;
(i >= 0) &&
((location[i] != wxT(':')) || (i == 1) || (location[i-2] == wxT(':')));
i--)
{
if (location[i] == wxT('#')) l2 = i + 1;
}
if (i == 0) return wxEmptyString;
else return location.Mid(i + 1, l2 - i - 2);
}
wxString wxFileSystemHandler::GetAnchor(const wxString& location) const
{
char c;
int l = location.Length();
for (int i = l-1; i >= 0; i--) {
c = location[i];
if (c == wxT('#')) return location.Right(l-i-1);
else if ((c == wxT('.')) || (c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':'))) return wxEmptyString;
}
return wxEmptyString;
}
wxString wxFileSystemHandler::FindFirst(const wxString& WXUNUSED(spec),
int WXUNUSED(flags))
{
return wxEmptyString;
}
wxString wxFileSystemHandler::FindNext()
{
return wxEmptyString;
}
//--------------------------------------------------------------------------------
// wxLocalFSHandler
//--------------------------------------------------------------------------------
wxString wxLocalFSHandler::ms_root;
bool wxLocalFSHandler::CanOpen(const wxString& location)
{
return GetProtocol(location) == wxT("file");
}
wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
{
// location has Unix path separators
wxString right = GetRightLocation(location);
wxFileName fn = wxFileSystem::URLToFileName(right);
wxString fullpath = ms_root + fn.GetFullPath();
if (!wxFileExists(fullpath))
return (wxFSFile*) NULL;
return new wxFSFile(new wxFFileInputStream(fullpath),
right,
GetMimeTypeFromExt(location),
GetAnchor(location)
#if wxUSE_DATETIME
,wxDateTime(wxFileModificationTime(fullpath))
#endif // wxUSE_DATETIME
);
}
wxString wxLocalFSHandler::FindFirst(const wxString& spec, int flags)
{
wxFileName fn = wxFileSystem::URLToFileName(GetRightLocation(spec));
return wxFindFirstFile(ms_root + fn.GetFullPath(), flags);
}
wxString wxLocalFSHandler::FindNext()
{
return wxFindNextFile();
}
//-----------------------------------------------------------------------------
// wxFileSystem
//-----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxFileSystem, wxObject)
IMPLEMENT_ABSTRACT_CLASS(wxFSFile, wxObject)
wxList wxFileSystem::m_Handlers;
static wxString MakeCorrectPath(const wxString& path)
{
wxString p(path);
wxString r;
int i, j, cnt;
cnt = p.Length();
for (i = 0; i < cnt; i++)
if (p.GetChar(i) == wxT('\\')) p.GetWritableChar(i) = wxT('/'); // Want to be windows-safe
if (p.Left(2) == wxT("./")) { p = p.Mid(2); cnt -= 2; }
if (cnt < 3) return p;
r << p.GetChar(0) << p.GetChar(1);
// skip trailing ../.., if any
for (i = 2; i < cnt && (p.GetChar(i) == wxT('/') || p.GetChar(i) == wxT('.')); i++) r << p.GetChar(i);
// remove back references: translate dir1/../dir2 to dir2
for (; i < cnt; i++)
{
r << p.GetChar(i);
if (p.GetChar(i) == wxT('/') && p.GetChar(i-1) == wxT('.') && p.GetChar(i-2) == wxT('.'))
{
for (j = r.Length() - 2; j >= 0 && r.GetChar(j) != wxT('/') && r.GetChar(j) != wxT(':'); j--) {}
if (j >= 0 && r.GetChar(j) != wxT(':'))
{
for (j = j - 1; j >= 0 && r.GetChar(j) != wxT('/') && r.GetChar(j) != wxT(':'); j--) {}
r.Remove(j + 1);
}
}
}
for (; i < cnt; i++) r << p.GetChar(i);
return r;
}
void wxFileSystem::ChangePathTo(const wxString& location, bool is_dir)
{
int i, pathpos = -1;
m_Path = MakeCorrectPath(location);
if (is_dir)
{
if (m_Path.Length() > 0 && m_Path.Last() != wxT('/') && m_Path.Last() != wxT(':'))
m_Path << wxT('/');
}
else
{
for (i = m_Path.Length()-1; i >= 0; i--)
{
if (m_Path[(unsigned int) i] == wxT('/'))
{
if ((i > 1) && (m_Path[(unsigned int) (i-1)] == wxT('/')) && (m_Path[(unsigned int) (i-2)] == wxT(':')))
{
i -= 2;
continue;
}
else
{
pathpos = i;
break;
}
}
else if (m_Path[(unsigned int) i] == wxT(':')) {
pathpos = i;
break;
}
}
if (pathpos == -1)
{
for (i = 0; i < (int) m_Path.Length(); i++)
{
if (m_Path[(unsigned int) i] == wxT(':'))
{
m_Path.Remove(i+1);
break;
}
}
if (i == (int) m_Path.Length())
m_Path = wxEmptyString;
}
else
{
m_Path.Remove(pathpos+1);
}
}
}
wxFSFile* wxFileSystem::OpenFile(const wxString& location)
{
wxString loc = MakeCorrectPath(location);
unsigned i, ln;
char meta;
wxFSFile *s = NULL;
wxList::compatibility_iterator node;
ln = loc.Length();
meta = 0;
for (i = 0; i < ln; i++)
{
switch (loc[i])
{
case wxT('/') : case wxT(':') : case wxT('#') :
meta = loc[i];
break;
}
if (meta != 0) break;
}
m_LastName = wxEmptyString;
// try relative paths first :
if (meta != wxT(':'))
{
node = m_Handlers.GetFirst();
while (node)
{
wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
if (h->CanOpen(m_Path + loc))
{
s = h->OpenFile(*this, m_Path + loc);
if (s) { m_LastName = m_Path + loc; break; }
}
node = node->GetNext();
}
}
// if failed, try absolute paths :
if (s == NULL)
{
node = m_Handlers.GetFirst();
while (node)
{
wxFileSystemHandler *h = (wxFileSystemHandler*) node->GetData();
if (h->CanOpen(loc))
{
s = h->OpenFile(*this, loc);
if (s) { m_LastName = loc; break; }
}
node = node->GetNext();
}
}
return (s);
}
wxString wxFileSystem::FindFirst(const wxString& spec, int flags)
{
wxList::compatibility_iterator node;
wxString spec2(spec);
m_FindFileHandler = NULL;
for (int i = spec2.Length()-1; i >= 0; i--)
if (spec2[(unsigned int) i] == wxT('\\')) spec2.GetWritableChar(i) = wxT('/'); // Want to be windows-safe
node = m_Handlers.GetFirst();
while (node)
{
m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
if (m_FindFileHandler -> CanOpen(m_Path + spec2))
return m_FindFileHandler -> FindFirst(m_Path + spec2, flags);
node = node->GetNext();
}
node = m_Handlers.GetFirst();
while (node)
{
m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
if (m_FindFileHandler -> CanOpen(spec2))
return m_FindFileHandler -> FindFirst(spec2, flags);
node = node->GetNext();
}
return wxEmptyString;
}
wxString wxFileSystem::FindNext()
{
if (m_FindFileHandler == NULL) return wxEmptyString;
else return m_FindFileHandler -> FindNext();
}
void wxFileSystem::AddHandler(wxFileSystemHandler *handler)
{
m_Handlers.Append(handler);
}
void wxFileSystem::CleanUpHandlers()
{
WX_CLEAR_LIST(wxList, m_Handlers);
}
const static wxString g_unixPathString(wxT("/"));
const static wxString g_nativePathString(wxFILE_SEP_PATH);
// Returns the native path for a file URL
wxFileName wxFileSystem::URLToFileName(const wxString& url)
{
wxString path = url;
if ( path.Find(wxT("file://")) == 0 )
{
path = path.Mid(7);
}
else if ( path.Find(wxT("file:")) == 0 )
{
path = path.Mid(5);
}
// Remove preceding double slash on Mac Classic
#if defined(__WXMAC__) && !defined(__UNIX__)
else if ( path.Find(wxT("//")) == 0 )
path = path.Mid(2);
#endif
path.Replace(wxT("%25"), wxT("%"));
path.Replace(wxT("%3A"), wxT(":"));
#ifdef __WXMSW__
// file urls either start with a forward slash (local harddisk),
// otherwise they have a servername/sharename notation,
// which only exists on msw and corresponds to a unc
if ( path[0u] == wxT('/') && path [1u] != wxT('/'))
{
path = path.Mid(1);
}
else if ( (url.Find(wxT("file://")) == 0) &&
(path.Find(wxT('/')) != wxNOT_FOUND) &&
(path.Length() > 1) && (path[1u] != wxT(':')) )
{
path = wxT("//") + path;
}
#endif
path.Replace(g_unixPathString, g_nativePathString);
return wxFileName(path, wxPATH_NATIVE);
}
// Returns the file URL for a native path
wxString wxFileSystem::FileNameToURL(const wxFileName& filename)
{
wxFileName fn = filename;
fn.Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_TILDE | wxPATH_NORM_ABSOLUTE);
wxString url = fn.GetFullPath(wxPATH_NATIVE);
#ifndef __UNIX__
// unc notation, wxMSW
if ( url.Find(wxT("\\\\")) == 0 )
{
url = url.Mid(2);
}
else
{
url = wxT("/") + url;
#ifdef __WXMAC__
url = wxT("/") + url;
#endif
}
#endif
url.Replace(g_nativePathString, g_unixPathString);
url.Replace(wxT("%"), wxT("%25"));
url.Replace(wxT(":"), wxT("%3A"));
url = wxT("file:") + url;
return url;
}
///// Module:
class wxFileSystemModule : public wxModule
{
DECLARE_DYNAMIC_CLASS(wxFileSystemModule)
public:
virtual bool OnInit()
{
wxFileSystem::AddHandler(new wxLocalFSHandler);
#if wxUSE_MIMETYPE
gs_FSMimeFallbacks = new wxFileTypeInfo[6];
gs_FSMimeFallbacks[0] =
wxFileTypeInfo(_T("image/jpeg"),
_T(""),
_T(""),
_T("JPEG image (from fallback)"),
_T("jpg"), _T("jpeg"), NULL);
gs_FSMimeFallbacks[1] =
wxFileTypeInfo(_T("image/gif"),
_T(""),
_T(""),
_T("GIF image (from fallback)"),
_T("gif"), NULL);
gs_FSMimeFallbacks[2] =
wxFileTypeInfo(_T("image/png"),
_T(""),
_T(""),
_T("PNG image (from fallback)"),
_T("png"), NULL);
gs_FSMimeFallbacks[3] =
wxFileTypeInfo(_T("image/bmp"),
_T(""),
_T(""),
_T("windows bitmap image (from fallback)"),
_T("bmp"), NULL);
gs_FSMimeFallbacks[4] =
wxFileTypeInfo(_T("text/html"),
_T(""),
_T(""),
_T("HTML document (from fallback)"),
_T("htm"), _T("html"), NULL);
gs_FSMimeFallbacks[5] =
// must terminate the table with this!
wxFileTypeInfo();
#endif
return TRUE;
}
virtual void OnExit()
{
#if wxUSE_MIMETYPE
delete [] gs_FSMimeFallbacks;
#endif
wxFileSystem::CleanUpHandlers();
}
};
IMPLEMENT_DYNAMIC_CLASS(wxFileSystemModule, wxModule)
#endif
// wxUSE_FILESYSTEM
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