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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2963 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
294
src/common/filesys.cpp
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294
src/common/filesys.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: filesys.cpp
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// Purpose: wxFileSystem class - interface for opening files
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// Author: Vaclav Slavik
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// Copyright: (c) 1999 Vaclav Slavik
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// Licence: wxWindows Licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include <wx/wxprec.h>
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#ifdef __BORDLANDC__
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#pragma hdrstop
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#endif
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#ifndef WXPRECOMP
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#include <wx/wx.h>
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#endif
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#include <wx/wfstream.h>
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#include <wx/url.h>
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#include <wx/module.h>
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#include <wx/filesys.h>
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//--------------------------------------------------------------------------------
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// wxFileSystemHandler
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//--------------------------------------------------------------------------------
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IMPLEMENT_ABSTRACT_CLASS(wxFileSystemHandler, wxObject)
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wxMimeTypesManager wxFileSystemHandler::m_MimeMng;
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wxString wxFileSystemHandler::GetMimeTypeFromExt(const wxString& location)
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{
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wxString ext = wxEmptyString, mime = wxEmptyString;
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wxString loc = GetRightLocation(location);
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char c;
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int l = loc.Length(), l2;
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wxFileType *ft;
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l2 = l;
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for (int i = l-1; i >= 0; i--) {
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c = loc[i];
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if (c == '#') l2 = i + 1;
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if (c == '.') {ext = loc.Right(l2-i-1); break;}
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if ((c == '/') || (c == '\\') || (c == ':')) {return wxEmptyString;}
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}
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ft = m_MimeMng.GetFileTypeFromExtension(ext);
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if (ft && (ft -> GetMimeType(&mime))) return mime;
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else return wxEmptyString;
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}
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wxString wxFileSystemHandler::GetProtocol(const wxString& location) const
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{
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wxString s = wxEmptyString;
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int i, l = location.Length();
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bool fnd;
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fnd = FALSE;
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for (i = l-1; (i >= 0) && ((location[i] != '#') || (!fnd)); i--) {
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if ((location[i] == ':') && (i != 1 /*win: C:\path*/)) fnd = TRUE;
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}
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if (!fnd) return "file";
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for (++i; (i < l) && (location[i] != ':'); i++) s << location[i];
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return s;
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}
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wxString wxFileSystemHandler::GetLeftLocation(const wxString& location) const
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{
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int i;
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bool fnd;
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fnd = FALSE;
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for (i = location.Length()-1; i >= 0; i--) {
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if ((location[i] == ':') && (i != 1 /*win: C:\path*/)) fnd = TRUE;
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else if (fnd && (location[i] == '#')) return location.Left(i);
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}
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return wxEmptyString;
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}
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wxString wxFileSystemHandler::GetRightLocation(const wxString& location) const
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{
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int i, l = location.Length();
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int l2 = l + 1;
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for (i = l-1; (i >= 0) && ((location[i] != ':') || (i == 1) || (location[i-2] == ':')); i--) {if (location[i] == '#') l2 = i + 1;}
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if (i == 0) return wxEmptyString;
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else return location.Mid(i + 1, l2 - i - 2);
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}
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wxString wxFileSystemHandler::GetAnchor(const wxString& location) const
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{
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char c;
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int l = location.Length();
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for (int i = l-1; i >= 0; i--) {
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c = location[i];
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if (c == '#') return location.Right(l-i-1);
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else if ((c == '.') || (c == '/') || (c == '\\') || (c == ':')) return wxEmptyString;
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}
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return wxEmptyString;
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}
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//--------------------------------------------------------------------------------
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// wxLocalFSHandler
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//--------------------------------------------------------------------------------
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class wxLocalFSHandler : public wxFileSystemHandler
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{
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public:
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virtual bool CanOpen(const wxString& location);
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virtual wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
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};
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bool wxLocalFSHandler::CanOpen(const wxString& location)
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{
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return GetProtocol(location) == "file";
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}
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wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
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{
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wxString right = GetRightLocation(location);
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if (wxFileExists(right))
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return new wxFSFile(new wxFileInputStream(right),
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right,
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GetMimeTypeFromExt(location),
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GetAnchor(location));
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else return NULL;
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}
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//-----------------------------------------------------------------------------
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// wxFileSystem
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxFileSystem, wxObject)
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wxList wxFileSystem::m_Handlers;
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void wxFileSystem::ChangePathTo(const wxString& location, bool is_dir)
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{
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int i, pathpos = -1;
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m_Path = location;
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for (i = m_Path.Length()-1; i >= 0; i--)
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if (m_Path[i] == '\\') m_Path.GetWritableChar(i) = '/'; // wanna be windows-safe
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if (is_dir == FALSE) {
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for (i = m_Path.Length()-1; i >= 0; i--) {
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if (m_Path[i] == '/') {
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if ((i > 1) && (m_Path[i-1] == '/') && (m_Path[i-2] == ':')) {
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i -= 2;
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continue;
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}
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else {
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pathpos = i;
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break;
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}
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}
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else if (m_Path[i] == ':') {
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pathpos = i;
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break;
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}
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}
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if (pathpos == -1) {
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for (i = 0; i < (int) m_Path.Length(); i++) {
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if (m_Path[i] == ':') {
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//m_Path << '/';
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m_Path.Remove(i+1);
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break;
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}
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}
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if (i == (int) m_Path.Length()) m_Path = wxEmptyString;
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}
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else {
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if (m_Path[m_Path.Length()-1] != '/') m_Path << '/';
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m_Path.Remove(pathpos+1);
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}
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}
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}
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wxFSFile* wxFileSystem::OpenFile(const wxString& location)
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{
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wxString loc = location;
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int i, ln;
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char meta;
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wxFSFile *s = NULL;
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wxNode *node;
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ln = loc.Length();
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meta = 0;
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for (i = 0; i < ln; i++) {
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if (loc[i] == '\\') loc.GetWritableChar(i) = '/'; // wanna be windows-safe
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if (!meta) switch (loc[i]) {
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case '/' : case ':' : case '#' : meta = loc[i];
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}
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}
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m_LastName = wxEmptyString;
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// try relative paths first :
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if (meta != ':') {
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node = m_Handlers.GetFirst();
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while (node){
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wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
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if (h -> CanOpen(m_Path + location)) {
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s = h -> OpenFile(*this, m_Path + location);
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if (s) {m_LastName = m_Path + location; break;}
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}
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node = node -> GetNext();
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}
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}
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// if failed, try absolute paths :
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if (s == NULL) {
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node = m_Handlers.GetFirst();
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while (node){
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wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
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if (h -> CanOpen(location)) {
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s = h -> OpenFile(*this, location);
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if (s) {m_LastName = location; break; }
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}
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node = node -> GetNext();
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}
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}
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return (s);
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}
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void wxFileSystem::AddHandler(wxFileSystemHandler *handler)
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{
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m_Handlers.Append(handler);
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}
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///// Module:
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class wxFileSystemModule : public wxModule
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{
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DECLARE_DYNAMIC_CLASS(wxFileSystemModule)
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public:
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virtual bool OnInit()
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{
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wxFileSystem::AddHandler(new wxLocalFSHandler);
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return TRUE;
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}
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virtual void OnExit() {}
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};
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IMPLEMENT_DYNAMIC_CLASS(wxFileSystemModule, wxModule)
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