Commited latest SciTech changes into CVS. This includes updates to the

[wxWidgets.git] / contrib / src / applet / prepinclude.cpp

diff --git a/contrib/src/applet/prepinclude.cpp b/contrib/src/applet/prepinclude.cpp
new file mode 100644 (file)
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+++ b/contrib/src/applet/prepinclude.cpp
@@ -0,0 +1,146 @@
+/****************************************************************************
+*
+*                       wxWindows HTML Applet Package
+*
+*               Copyright (C) 1991-2001 SciTech Software, Inc.
+*                            All rights reserved.
+*
+*  ========================================================================
+*
+*    The contents of this file are subject to the wxWindows License
+*    Version 3.0 (the "License"); you may not use this file except in
+*    compliance with the License. You may obtain a copy of the License at
+*    http://www.wxwindows.org/licence3.txt
+*
+*    Software distributed under the License is distributed on an
+*    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+*    implied. See the License for the specific language governing
+*    rights and limitations under the License.
+*
+*  ========================================================================
+*
+* Language:            ANSI C++
+* Environment: Any
+*
+* Description:  This file is the implementation of the Preprocessor object
+* for parsing the <!--#include
+*
+****************************************************************************/
+
+// For compilers that support precompilation
+#include "wx/wxprec.h"
+//#include "wx/file.h"
+#include "wx/filesys.h"
+// Include private headers
+#include "wx/applet/prepinclude.h"
+
+#define RECURSE_LIMIT 50
+/*---------------------------- Global variables ---------------------------*/
+
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+text        - HTML to process for include directives
+
+RETURNS:
+The string containing the processed HTML
+
+REMARKS:
+This is the only implemented method of the Preprocessor class. It is a constant
+function that parses a string. Basically we load the string search for include
+statements then replace them with the correct file. Wash rinse and repeat until
+all recursive cases are handled.
+****************************************************************************/
+wxString wxIncludePrep::Process(
+    const wxString& text) const
+{
+    int i;
+       char ft[] = "<!--#include virtual=";
+       
+    wxFileSystem *fs = new wxFileSystem;
+    fs->ChangePathTo(DOC_ROOT, true);
+
+    int openedcount = 0;
+
+    // make a copy so we can replace text as we go without affecting the original
+       wxString output = text;
+       while ((i = (output.Lower()).Find(ft)) != -1) {
+               // This loop makes more recursion unnecessary since each iteration adds
+               // the new include files to output.
+               int n, c;
+               wxString fname;
+
+        n = (output.Mid(i+21)).Find("-->");
+               
+               if (n == -1) {
+#ifdef CHECKED                 
+            wxMessageBox("wxHTML #include error: Could not read filename. Premature end of file.","Error",wxICON_ERROR);
+#endif                 
+            break;
+            }
+
+               fname = output.Mid(i+21, n);
+               
+               // Clip off any quotation marks if they exist. (don't die if there arn't any)
+               c = fname.Find("\"");
+        if (c != -1) fname = fname.Mid(c+1);
+               c = fname.Find("\"");
+               if (c != -1) fname = fname.Mid(0, c);
+               
+               // remove the #include tag
+        output.Remove(i, n+21+3);
+
+        wxFSFile * file = fs->OpenFile(fname);
+                       
+        if (!file) {
+#ifdef CHECKED         
+                       wxMessageBox(wxString("wxHTML #include error: File not Found ") + fname + wxString("."),"Error",wxICON_ERROR);
+#endif
+            continue;
+                       }                       
+                                                       
+               wxString tmp;
+
+       
+        do {
+                       char tmp2[257];
+                       (file->GetStream())->Read(tmp2, 256);
+                       c = (file->GetStream())->LastRead();
+            tmp2[c] = 0;
+                       tmp += wxString(tmp2);
+                       } while (c == 256);
+
+               output = (output.Mid(0,i) + tmp + output.Mid(i));
+
+        #ifdef CHECKED 
+        if (openedcount > RECURSE_LIMIT) {
+            wxMessageBox(wxString("wxHTML #include error: More than RECURSE_LIMIT files have been #included you may have a file that is directly or indirectly including itself, causing an endless loop"), "Error" ,wxICON_ERROR);
+            break;
+            }
+        #endif                 
+
+        openedcount++;
+        delete file;
+        }
+       
+       delete fs;
+       return output;
+}
+
+/****************************************************************************
+PARAMETERS:
+dir     - Default directory to get included HTML files from
+
+REMARKS:
+This function sets the directory to get included HTML files from. The default
+value is the current directory. Directorys may be given as a relative path.
+****************************************************************************/
+void wxIncludePrep::ChangeDirectory(
+    const wxString &dir)
+{
+
+    DOC_ROOT = dir;
+}
+