path: root/embed/mozilla/FilePicker.cpp

/*
 *  Copyright (C) 2001 Philip Langdale
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/* Things to be aware of:
 *
 * This filepicker, like the mozilla one, does not make an attempt
 * to verify the validity of the initial directory you pass it.
 * It does check that the user doesn't give it a garbage path
 * during use, but it is the caller's responsibility to give a
 * sensible initial path.
 *
 * At the current moment, we instantiate the filepicker directly
 * in our contenthandler where there is path verification code
 * and else where through our C wrapper, which also does verification.
 * If, at a future date, you need to instantiate filepicker without
 * using the C wrapper, please verify the initial path. See
 * ContentHandler for a way to do this.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "ephy-string.h"
#include "ephy-gui.h"

#include <glib/gconvert.h>
#include <gtk/gtkmain.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkmenu.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkcheckbutton.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkfilesel.h>
#include <gtk/gtkhbbox.h>
#include <gtk/gtkoptionmenu.h>
#include <gtk/gtkmessagedialog.h>
#include <libgnome/gnome-i18n.h>

#include "nsIFilePicker.h"

#include "nsCRT.h"
#include "nsCOMPtr.h"
#include "nsISupportsArray.h"
#include "nsIServiceManager.h"

#include "nsString.h"
#include "nsXPIDLString.h"
#include "nsIPrefService.h"
#include "nsIURI.h"
#include "nsIFileURL.h"
#include "nsIChannel.h"
#include "nsIFileChannel.h"
#include "nsNetCID.h"
#include "nsILocalFile.h"
#include "nsIPromptService.h"
#include "nsReadableUtils.h"

#include <libgnome/gnome-util.h>

#include "FilePicker.h"
#include "MozillaPrivate.h"

/* Implementation file */
NS_IMPL_ISUPPORTS1(GFilePicker, nsIFilePicker)

GFilePicker::GFilePicker()
{
    NS_INIT_ISUPPORTS();

    /* member initializers and constructor code */
    mFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID);
    mDisplayDirectory = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID);
    mDisplayDirectory->InitWithNativePath(nsDependentCString(g_get_home_dir()));
}

GFilePicker::~GFilePicker()
{
    /* destructor code */
}

////////////////////////////////////////////////////////////////////////////////
// begin nsIFilePicker impl
////////////////////////////////////////////////////////////////////////////////

/* void init (in nsIDOMWindowInternal parent, in wstring title, in short mode); */
NS_IMETHODIMP GFilePicker::Init(nsIDOMWindowInternal *aParent, 
                const PRUnichar *aTitle, PRInt16 aMode)
{
    mParent = do_QueryInterface(aParent);
    mParentWidget = MozillaFindGtkParent(mParent);
    mTitle = NS_ConvertUCS2toUTF8(aTitle);
    mMode = aMode;
    
    return NS_OK;
}

/* void appendFilters (in long filterMask); */
NS_IMETHODIMP GFilePicker::AppendFilters(PRInt32 aFilterMask)
{
    //This function cannot be implemented due to the crippled
    //nature of GtkFileSelection, but NS_ERROR_NOT_IMPLEMENTED
    //is interpreted as a terminal error by some callers.
    return NS_OK;
}

/* void appendFilter (in wstring title, in wstring filter); */
NS_IMETHODIMP GFilePicker::AppendFilter(const PRUnichar *aTitle,
                    const PRUnichar *aFilter)
{
    //GtkFileSelection is crippled, so we can't provide a short-list
    //of filters to choose from. We provide minimal functionality
    //by using the most recent AppendFilter call as the active filter.
    mFilter = NS_ConvertUCS2toUTF8(aFilter);
    return NS_OK;
}

/* attribute long filterIndex; */
NS_IMETHODIMP GFilePicker::GetFilterIndex(PRInt32 *aFilterIndex)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP GFilePicker::SetFilterIndex(PRInt32 aFilterIndex)
{
    return NS_OK;
}

/* attribute wstring defaultString; */
NS_IMETHODIMP GFilePicker::GetDefaultString(PRUnichar * *aDefaultString)
{
    gsize bytesWritten;
    gchar *utf8DefaultString = g_filename_to_utf8(mDefaultString.get(), -1,
                              NULL,
                              &bytesWritten, NULL);

    *aDefaultString = ToNewUnicode(NS_ConvertUTF8toUCS2(utf8DefaultString));
    g_free(utf8DefaultString);

    return NS_OK;
}
NS_IMETHODIMP GFilePicker::SetDefaultString(const PRUnichar *aDefaultString)
{
    if (aDefaultString)
    {
        gsize bytesWritten;
        gchar *localeDefaultString =
            g_filename_from_utf8(NS_ConvertUCS2toUTF8(aDefaultString).get(),
                         -1, NULL,
                         &bytesWritten, NULL);
        mDefaultString = localeDefaultString;                        
        g_free(localeDefaultString);
    }
    else
        mDefaultString = "";
    return NS_OK;
}

/* attribute wstring defaultExtension; */
// Again, due to the crippled file selector, we can't really
// do anything here.
NS_IMETHODIMP GFilePicker::GetDefaultExtension(PRUnichar * *aDefaultExtension)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP GFilePicker::SetDefaultExtension(const PRUnichar *aDefaultExtension)
{
    return NS_OK;
}

/* attribute nsILocalFile displayDirectory; */
NS_IMETHODIMP GFilePicker::GetDisplayDirectory(nsILocalFile * *aDisplayDirectory)
{
    NS_IF_ADDREF(*aDisplayDirectory = mDisplayDirectory);
    return NS_OK;
}
NS_IMETHODIMP GFilePicker::SetDisplayDirectory(nsILocalFile * aDisplayDirectory)
{
    mDisplayDirectory = aDisplayDirectory;
    return NS_OK;
}

/* readonly attribute nsILocalFile file; */
NS_IMETHODIMP GFilePicker::GetFile(nsILocalFile * *aFile)
{
    NS_IF_ADDREF(*aFile = mFile);
    return NS_OK;
}

/* readonly attribute nsIFileURL fileURL; */
NS_IMETHODIMP GFilePicker::GetFileURL(nsIFileURL * *aFileURL)
{
    nsCOMPtr<nsIFileURL> fileURL = 
        do_CreateInstance(NS_STANDARDURL_CONTRACTID);
    fileURL->SetFile(mFile);
    NS_IF_ADDREF(*aFileURL = fileURL);
    return NS_OK;
}

/* readonly attribute nsISimpleEnumerator files; */
NS_IMETHODIMP GFilePicker::GetFiles(nsISimpleEnumerator * *aFiles)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

/* short show (); */
NS_IMETHODIMP GFilePicker::Show(PRInt16 *_retval)
{
    mFileSelector = gtk_file_selection_new(mTitle.get());

    nsCAutoString cFileName;
    if(mMode == nsIFilePicker::modeGetFolder)
        cFileName.Assign("");
    else
        cFileName = mDefaultString;

    nsCAutoString cDirName;
    mDisplayDirectory->GetNativePath(cDirName);

    nsCAutoString cFullPath;
    cFullPath.Assign(cDirName + NS_LITERAL_CSTRING("/") + cFileName);
    gtk_file_selection_set_filename(GTK_FILE_SELECTION(mFileSelector),
                    cFullPath.get());

    if (!mFilter.IsEmpty())
    {
        gtk_file_selection_complete(GTK_FILE_SELECTION(mFileSelector),
                        mFilter.get());
    }

    if (mParentWidget)
        gtk_window_set_transient_for(GTK_WINDOW(mFileSelector),
                         GTK_WINDOW(mParentWidget));

    if (mMode == nsIFilePicker::modeGetFolder)
    {
        gtk_widget_set_sensitive(GTK_FILE_SELECTION(mFileSelector)
                     ->file_list, FALSE);
    }

    gtk_window_set_modal(GTK_WINDOW(mFileSelector), TRUE);

    gint retVal = gtk_dialog_run(GTK_DIALOG(mFileSelector));
    
    HandleFilePickerResult();

    if (retVal != GTK_RESPONSE_OK)
    {
        *_retval = returnCancel;
    }
    else
    {   
        ValidateFilePickerResult(_retval);
    }

    gtk_widget_destroy(mFileSelector);

    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////
// begin local public methods impl
////////////////////////////////////////////////////////////////////////////////

NS_METHOD GFilePicker::InitWithGtkWidget (GtkWidget *aParentWidget, 
                      const char *aTitle, PRInt16 aMode)
{
    mParentWidget = aParentWidget;

    mTitle = nsDependentCString(aTitle);

    mMode = aMode;

    mFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID);

    return NS_OK;
}

NS_METHOD GFilePicker::SanityCheck (PRBool *retIsSane)
{
    *retIsSane = PR_TRUE;
    
    nsresult rv;
    PRBool dirExists, fileExists = PR_TRUE;

    if (mDisplayDirectory)
    {
        rv = mDisplayDirectory->Exists (&dirExists);
        g_return_val_if_fail (NS_SUCCEEDED(rv), rv);
    }
    else
    {
        dirExists = PR_FALSE;
    }

    if (mMode != nsIFilePicker::modeGetFolder)
    {
        rv = mFile->Exists (&fileExists);
        g_return_val_if_fail (NS_SUCCEEDED(rv), rv);
    }

    if (mMode == nsIFilePicker::modeSave && !fileExists)
    {
        return NS_OK;
    }
    
    if (!dirExists || !fileExists)
    {
        GtkWidget *errorDialog = gtk_message_dialog_new (
                NULL,
                GTK_DIALOG_MODAL,
                GTK_MESSAGE_ERROR,
                GTK_BUTTONS_OK,
                _("The specified path does not exist."));

        if (mParentWidget)
            gtk_window_set_transient_for(GTK_WINDOW(errorDialog),
                             GTK_WINDOW(mFileSelector));

        gtk_window_set_modal (GTK_WINDOW(errorDialog), TRUE);
        gtk_dialog_run (GTK_DIALOG(errorDialog));
        gtk_widget_destroy (errorDialog);
        *retIsSane = PR_FALSE;
        return NS_OK;
    }

    PRBool correctType;
    char *errorText;
    if (mMode == nsIFilePicker::modeGetFolder)
    {
        rv = mDisplayDirectory->IsDirectory (&correctType);
        g_return_val_if_fail (NS_SUCCEEDED(rv), rv);
        errorText = g_strdup (_("A file was selected when a "
                    "folder was expected."));
    }
    else
    {
        rv = mFile->IsFile (&correctType);
        g_return_val_if_fail (NS_SUCCEEDED(rv), rv);
        errorText = g_strdup (_("A folder was selected when a "
                        "file was expected."));
    }
    
    if(!correctType)
    {
        GtkWidget *errorDialog = gtk_message_dialog_new (
                NULL,
                GTK_DIALOG_MODAL,
                GTK_MESSAGE_ERROR,
                GTK_BUTTONS_OK,
                errorText);

        if (mParentWidget)
            gtk_window_set_transient_for(GTK_WINDOW(errorDialog),
                             GTK_WINDOW(mFileSelector));

        gtk_window_set_modal (GTK_WINDOW(errorDialog), TRUE);
        gtk_dialog_run (GTK_DIALOG(errorDialog));
        gtk_widget_destroy (errorDialog);
        *retIsSane = PR_FALSE;
    }
    g_free (errorText);

    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////
// begin local private methods impl
////////////////////////////////////////////////////////////////////////////////

NS_METHOD GFilePicker::HandleFilePickerResult()
{
    const char *fileName = gtk_file_selection_get_filename(GTK_FILE_SELECTION(mFileSelector));

    if (!fileName || strlen(fileName) == 0) return NS_ERROR_FAILURE;

    const nsACString &cFileName = nsDependentCString(fileName);
    mFile->InitWithNativePath(cFileName);

    if (mMode == nsIFilePicker::modeGetFolder)
    {
        mDisplayDirectory->InitWithNativePath(cFileName);
        mDefaultString = "";
    }
    else
    {
        nsCOMPtr<nsIFile> directory;
        mFile->GetParent(getter_AddRefs(directory));
        mDisplayDirectory = do_QueryInterface(directory);
        mFile->GetNativeLeafName(mDefaultString);
    }

    return NS_OK;
}

NS_METHOD GFilePicker::ValidateFilePickerResult(PRInt16 *retval)
{
    nsresult rv;
    const char *fileName = gtk_file_selection_get_filename(GTK_FILE_SELECTION(mFileSelector));

    *retval = returnCancel;

    PRBool passesSanityCheck;
    rv = SanityCheck(&passesSanityCheck);
    if (NS_SUCCEEDED(rv) && !passesSanityCheck) return NS_ERROR_FAILURE;

    if (mMode == nsIFilePicker::modeSave)
    {
        if (!ephy_gui_confirm_overwrite_file (mFileSelector,
                                  fileName))
        {
            return NS_OK;
        }
    }

    *retval = returnOK;

    return NS_OK;
}