init.cpp

/*
 * This is what gets executed to initialize all of the modules.  For
 * the internal modules this invovles executing their initialization
 * functions, for external ones it involves reading their .spmodule
 * files and bringing them into Sodipodi.
 *
 * Authors:
 *   Ted Gould <ted@gould.cx>
 *
 * Copyright (C) 2002-2004 Authors
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "path-prefix.h"

#include <inttypes.h>
#include <dirent.h>
#include <glib.h>
#include <string.h>

#include "inkscape.h"
#include "xml/repr.h"
#include <glibmm/fileutils.h>
#include <glibmm/i18n.h>

#include "extension/extension.h"
#include "system.h"
#include "db.h"
#include "implementation/script.h"
#include "internal/svg.h"
#include "internal/svgz.h"
#include "internal/ps.h"
#ifdef WITH_GNOME_PRINT
# include "internal/gnome.h"
#endif
#ifdef WIN32
# include "internal/win32.h"
#endif
#include "internal/ps-out.h"
#include "internal/pov-out.h"
#include "internal/latex-pstricks-out.h"
#include "internal/latex-pstricks.h"
#include "internal/eps-out.h"
#include "internal/gdkpixbuf-input.h"
#include "internal/bluredge.h"
#include "internal/gimpgrad.h"
#include "internal/grid.h"
#include "prefs-utils.h"
#include "error-file.h"
#include "io/sys.h"

extern gboolean inkscape_app_use_gui( Inkscape::Application const *app );

namespace Inkscape {
namespace Extension {

/** This is the extention that all files are that are pulled from
    the extension directory and parsed */
#define SP_MODULE_EXTENSION  "inx"

static void build_module_from_dir(gchar const *dirname);
static void check_extensions();

/**
 * \return    none
 * \brief     Examines the given string preference and checks to see
 *            that at least one of the registered extensions matches
 *            it.  If not, a default is assigned.
 * \param     pref_path        Preference path to load
 * \param     pref_attr        Attribute to load from the preference
 * \param     pref_default     Default string to set
 * \param     extension_family List of extensions to search
 */
static void
update_pref(gchar const *pref_path, gchar const *pref_attr,
            gchar const *pref_default) // , GSList *extension_family)
{
    gchar const *pref = prefs_get_string_attribute(pref_path,pref_attr);
    /*
    gboolean missing=TRUE;
    for (GSList *list = extension_family; list; list = g_slist_next(list)) {
      g_assert( list->data );

      Inkscape::Extension *extension;
            extension = reinterpret_cast<Inkscape::Extension *>(list->data);

        if (!strcmp(extension->get_id(),pref)) missing=FALSE;
    }
    */
    if (!Inkscape::Extension::db.get( pref ) /*missing*/) {
        prefs_set_string_attribute(pref_path, pref_attr, pref_default);
    }
}

/**
 * Invokes the init routines for internal modules.
 *
 * This should be a list of all the internal modules that need to initialized.  This is just a
 * convinent place to put them.  Also, this function calls build_module_from_dir to parse the
 * Inkscape extensions directory.
 */
void
init()
{
    /* TODO: Change to Internal */
    Internal::Svg::init();
    Internal::Svgz::init();
    Internal::PsOutput::init();
    Internal::EpsOutput::init();
    Internal::PrintPS::init();
#ifdef WITH_GNOME_PRINT
    Internal::PrintGNOME::init();
#endif
#ifdef WIN32
    Internal::PrintWin32::init();
#endif
    Internal::PovOutput::init();
    Internal::PrintLatex::init();
    Internal::LatexOutput::init();

    /* Effects */
    Internal::BlurEdge::init();
    Internal::GimpGrad::init();
    Internal::Grid::init();
    
    /* Load search path for extensions */
    if (Inkscape::Extension::Extension::search_path.size() == 0)
    {
      Inkscape::Extension::Extension::search_path.push_back(profile_path("extensions"));
      Inkscape::Extension::Extension::search_path.push_back(g_strdup(INKSCAPE_EXTENSIONDIR));
    }

    for (unsigned int i=0; i<Inkscape::Extension::Extension::search_path.size(); i++) {
        build_module_from_dir(Inkscape::Extension::Extension::search_path[i]);
    }

    /* this is at the very end because it has several catch-alls
     * that are possibly over-ridden by other extensions (such as
     * svgz)
     */
    Internal::GdkpixbufInput::init();

    /* now we need to check and make sure everyone is happy */
    check_extensions();

    /* This is a hack to deal with updating saved outdated module
     * names in the prefs...
     */
    update_pref("dialogs.save_as", "default",
                SP_MODULE_KEY_OUTPUT_SVG_INKSCAPE
                // Inkscape::Extension::db.get_output_list()
        );
}

/**
 * \return    none
 * \brief     This function parses a directory for files of SP_MODULE_EXTENSION
 *            type and loads them.
 * \param     dirname  The directory that should be searched for modules
 *
 * Here is just a basic function that moves through a directory.  It looks at every entry, and
 * compares its filename with SP_MODULE_EXTENSION.  Of those that pass, build_from_file is called
 * with their filenames.
 */
static void
build_module_from_dir(gchar const *dirname)
{
    if (!dirname) {
        g_warning(_("Null external module directory name.  Modules will not be loaded."));
        return;
    }

    if (!Glib::file_test(std::string(dirname), Glib::FILE_TEST_EXISTS | Glib::FILE_TEST_IS_DIR)) {
        return;
    }

    //# Hopefully doing this the Glib way is portable
        
    GError *err;
    GDir *directory = g_dir_open(dirname, 0, &err);
    if (!directory) {
        gchar *safeDir = Inkscape::IO::sanitizeString(dirname);
        g_warning(_("Modules directory (%s) is unavailable.  External modules in that directory will not be loaded."), safeDir);
        g_free(safeDir);
        return;
    }

    gchar *filename;
    while ((filename = (gchar *)g_dir_read_name(directory)) != NULL) {

        if (strlen(filename) < strlen(SP_MODULE_EXTENSION)) {
            continue;
        }

        if (strcmp(SP_MODULE_EXTENSION, filename + (strlen(filename) - strlen(SP_MODULE_EXTENSION)))) {
            continue;
        }

        gchar *pathname = g_strdup_printf("%s/%s", dirname, filename);
        build_from_file(pathname);
        g_free(pathname);
    }

    g_dir_close(directory);
}


static void
check_extensions_internal(Extension *in_plug, gpointer in_data)
{
    int *count = (int *)in_data;

    if (!in_plug->deactivated() && !in_plug->check()) {
         in_plug->deactivate();
        (*count)++;
    }
}

static void
check_extensions()
{
    int count = 1;
    bool anyfail = false;
    // int pass = 0;

    Inkscape::Extension::Extension::error_file_open();
    while (count != 0) {
        // printf("Check extensions pass %d\n", pass++);
        count = 0;
        db.foreach(check_extensions_internal, (gpointer)&count);
        if (count != 0) anyfail = true;
    }
    Inkscape::Extension::Extension::error_file_close();
}

} } /* namespace Inkscape::Extension */


/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :