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pdf-out.cpp

/*
 * A quick hack to use the print output to write out a file.  This
 * then makes 'save as...' PDF.
 *
 * Authors:
 *   Ted Gould <ted@gould.cx>
 *   Ulf Erikson <ulferikson@users.sf.net>
 *
 * Copyright (C) 2004-2006 Authors
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "pdf-out.h"
#include <print.h>
#include "extension/system.h"
#include "extension/print.h"
#include "extension/db.h"
#include "extension/output.h"
#include "display/nr-arena.h"
#include "display/nr-arena-item.h"
#include "sp-path.h"

namespace Inkscape {
namespace Extension {
namespace Internal {

bool
PdfOutput::check (Inkscape::Extension::Extension * module)
{
      if (NULL == Inkscape::Extension::db.get(SP_MODULE_KEY_PRINT_PDF))
            return FALSE;

      return TRUE;
}


static void
pdf_print_document_to_file(SPDocument *doc, gchar const *filename)
{
    Inkscape::Extension::Print *mod;
    SPPrintContext context;
    gchar const *oldconst;
    gchar *oldoutput;
    unsigned int ret;

    sp_document_ensure_up_to_date(doc);

    mod = Inkscape::Extension::get_print(SP_MODULE_KEY_PRINT_PDF);
    oldconst = mod->get_param_string("destination");
    oldoutput = g_strdup(oldconst);
    mod->set_param_string("destination", (gchar *)filename);

/* Start */
    context.module = mod;
    /* fixme: This has to go into module constructor somehow */
    /* Create new arena */
    mod->base = SP_ITEM(sp_document_root(doc));
    mod->arena = NRArena::create();
    mod->dkey = sp_item_display_key_new(1);
    mod->root = sp_item_invoke_show(mod->base, mod->arena, mod->dkey, SP_ITEM_SHOW_DISPLAY);
    /* Print document */
    ret = mod->begin(doc);
    sp_item_invoke_print(mod->base, &context);
    ret = mod->finish();
    /* Release arena */
    sp_item_invoke_hide(mod->base, mod->dkey);
    mod->base = NULL;
    nr_arena_item_unref(mod->root);
    mod->root = NULL;
    nr_object_unref((NRObject *) mod->arena);
    mod->arena = NULL;
/* end */

    mod->set_param_string("destination", oldoutput);
    g_free(oldoutput);

    return;
}


/**
    \brief  This function calls the print system with the filename
      \param  mod   unused
      \param  doc   Document to be saved
    \param  uri   Filename to save to (probably will end in .pdf)

      The most interesting thing that this function does is just attach
      an '>' on the front of the filename.  This is the syntax used to
      tell the printing system to save to file.
*/
void
PdfOutput::save (Inkscape::Extension::Output *mod, SPDocument *doc, const gchar *uri)
{
    Inkscape::Extension::Extension * ext;

    ext = Inkscape::Extension::db.get(SP_MODULE_KEY_PRINT_PDF);
    if (ext == NULL)
        return;

      gchar * final_name;
      final_name = g_strdup_printf("> %s", uri);
      pdf_print_document_to_file(doc, final_name);
      g_free(final_name);

      return;
}

/**
      \brief   A function allocate a copy of this function.

      This is the definition of PDF out.  This function just
      calls the extension system with the memory allocated XML that
      describes the data.
*/
void
PdfOutput::init (void)
{
      Inkscape::Extension::build_from_mem(
            "<inkscape-extension>\n"
                  "<name>PDF Output</name>\n"
                  "<id>org.inkscape.output.pdf</id>\n"
                  "<output>\n"
                        "<extension>.pdf</extension>\n"
                        "<mimetype>application/pdf</mimetype>\n"
                        "<filetypename>PDF with Transparency (*.pdf)</filetypename>\n"
                        "<filetypetooltip>PDF File</filetypetooltip>\n"
                  "</output>\n"
            "</inkscape-extension>", new PdfOutput());

      return;
}

} } }  /* namespace Inkscape, Extension, Implementation */

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