evince-thumbnailer.c File Reference

#include <config.h>
#include <evince-document.h>
#include <gio/gio.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>

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Data Structures
struct	AsyncData

Macros
#define	THUMBNAIL_SIZE   128
#define	DEFAULT_SLEEP_TIME   (15 * G_USEC_PER_SEC) /* 15 seconds */

Functions
static G_GNUC_NORETURN gpointer	time_monitor (gpointer data)
static void	time_monitor_start (const char *input)
static void	time_monitor_stop (void)
static void	delete_temp_file (GFile *file)
static char *	get_target_uri (GFile *file)
static char *	get_local_path (GFile *file)
static EvDocument *	evince_thumbnailer_get_document (GFile *file)
static gboolean	evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
static gpointer	evince_thumbnail_pngenc_get_async (struct AsyncData *data)
static void	print_usage (GOptionContext *context)
int	main (int argc, char *argv[])

Variables
static gboolean	finished = TRUE
static gint	size = THUMBNAIL_SIZE
static gboolean	time_limit = TRUE
static const gchar **	file_arguments
static const GOptionEntry	goption_options []

Macro Definition Documentation

#define DEFAULT_SLEEP_TIME   (15 * G_USEC_PER_SEC) /* 15 seconds */

Definition at line 39 of file evince-thumbnailer.c.

#define THUMBNAIL_SIZE   128

Definition at line 38 of file evince-thumbnailer.c.

Function Documentation

static void delete_temp_file ( GFile *  file)

static

Definition at line 98 of file evince-thumbnailer.c.

{
    ev_tmp_file_unlink (file);
    g_object_unref (file);
}

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static gboolean evince_thumbnail_pngenc_get ( EvDocument *  document, const char *  thumbnail, int  size  )

static

Definition at line 198 of file evince-thumbnailer.c.

{
    EvRenderContext *rc;
    double width, height;
    GdkPixbuf *pixbuf;
    EvPage *page;

    page = ev_document_get_page (document, 0);
    
    ev_document_get_page_size (document, 0, &width, &height);

    rc = ev_render_context_new (page, 0, size / MAX (height, width));
    pixbuf = ev_document_get_thumbnail (document, rc);
    g_object_unref (rc);
    g_object_unref (page);
    
    if (pixbuf != NULL) {
        if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
            g_object_unref  (pixbuf);
            return TRUE;
        }

        g_object_unref  (pixbuf);
    }
    
    return FALSE;
}

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static gpointer evince_thumbnail_pngenc_get_async ( struct AsyncData *  data)

static

Definition at line 227 of file evince-thumbnailer.c.

{
    ev_document_doc_mutex_lock ();
    data->success = evince_thumbnail_pngenc_get (data->document,
                             data->output,
                             data->size);
    ev_document_doc_mutex_unlock ();
    
    g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
    
    return NULL;
}

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static EvDocument* evince_thumbnailer_get_document ( GFile *  file)

static

Definition at line 130 of file evince-thumbnailer.c.

{
    EvDocument *document = NULL;
    gchar      *uri, *path;
    GFile      *tmp_file = NULL;
    GError     *error = NULL;

    path = get_local_path (file);

    if (!path) {
        gchar *base_name, *template;

        base_name = g_file_get_basename (file);
        template = g_strdup_printf ("document.XXXXXX-%s", base_name);
        g_free (base_name);

        tmp_file = ev_mkstemp_file (template, &error);
        g_free (template);
        if (!tmp_file) {
            g_printerr ("Error loading remote document: %s\n", error->message);
            g_error_free (error);

            return NULL;
        }

        g_file_copy (file, tmp_file, G_FILE_COPY_OVERWRITE,
                 NULL, NULL, NULL, &error);
        if (error) {
            g_printerr ("Error loading remote document: %s\n", error->message);
            g_error_free (error);
            g_object_unref (tmp_file);

            return NULL;
        }
        uri = g_file_get_uri (tmp_file);
    } else {
        uri = g_filename_to_uri (path, NULL, NULL);
        g_free (path);
    }

    document = ev_document_factory_get_document_full (uri, EV_DOCUMENT_LOAD_FLAG_NO_CACHE, &error);
    if (tmp_file) {
        if (document) {
            g_object_weak_ref (G_OBJECT (document),
                       (GWeakNotify)delete_temp_file,
                       tmp_file);
        } else {
            ev_tmp_file_unlink (tmp_file);
            g_object_unref (tmp_file);
        }
    }
    g_free (uri);
    if (error) {
        if (error->domain == EV_DOCUMENT_ERROR &&
            error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
            /* FIXME: Create a thumb for cryp docs */
            g_error_free (error);
            return NULL;
        }
        g_printerr ("Error loading document: %s\n", error->message);
        g_error_free (error);
        return NULL;
    }

    return document;
}

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static char* get_local_path ( GFile *  file)

static

Definition at line 120 of file evince-thumbnailer.c.

{
    if (g_file_has_uri_scheme (file, "trash") != FALSE ||
        g_file_has_uri_scheme (file, "recent") != FALSE) {
        return get_target_uri (file);
    }
    return g_file_get_path (file);
}

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static char* get_target_uri ( GFile *  file)

static

Definition at line 105 of file evince-thumbnailer.c.

{
    GFileInfo *info;
    char *target;

    info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TARGET_URI, G_FILE_QUERY_INFO_NONE, NULL, NULL);
    if (info == NULL)
        return NULL;
    target = g_strdup (g_file_info_get_attribute_string (info, G_FILE_ATTRIBUTE_STANDARD_TARGET_URI));
    g_object_unref (info);

    return target;
}

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int main	(	int	argc,
		char *	argv[]
	)

Definition at line 251 of file evince-thumbnailer.c.

{
    EvDocument     *document;
    GOptionContext *context;
    const char     *input;
    const char     *output;
    GFile          *file;
    GError         *error = NULL;

    setlocale (LC_ALL, "");

    context = g_option_context_new ("- GNOME Document Thumbnailer");
    g_option_context_add_main_entries (context, goption_options, NULL);

    if (!g_option_context_parse (context, &argc, &argv, &error)) {
        g_printerr ("%s\n", error->message);
        g_error_free (error);
        print_usage (context);
        g_option_context_free (context);

        return -1;
    }

    input = file_arguments ? file_arguments[0] : NULL;
    output = input ? file_arguments[1] : NULL;
    if (!input || !output) {
        print_usage (context);
        g_option_context_free (context);

        return -1;
    }
    
    g_option_context_free (context);

    if (size < 1) {
        g_printerr ("Size cannot be smaller than 1 pixel\n");
        return -1;
    }

    input = file_arguments[0];
    output = file_arguments[1];

        if (!ev_init ())
                return -1;

    file = g_file_new_for_commandline_arg (input);
    document = evince_thumbnailer_get_document (file);
    g_object_unref (file);

    if (!document) {
        ev_shutdown ();
        return -2;
    }

        if (time_limit)
                time_monitor_start (input);

    if (EV_IS_ASYNC_RENDERER (document)) {
        struct AsyncData data;

        gtk_init (&argc, &argv);
        
        data.document = document;
        data.output = output;
        data.size = size;

        g_thread_new ("ThmbnlrAsyncRndr",
                (GThreadFunc) evince_thumbnail_pngenc_get_async,
                &data);
        
        gtk_main ();

        g_object_unref (document);
        ev_shutdown ();

        return data.success ? 0 : -2;
    }

    if (!evince_thumbnail_pngenc_get (document, output, size)) {
        g_object_unref (document);
        ev_shutdown ();
        return -2;
    }

        time_monitor_stop ();
    g_object_unref (document);
        ev_shutdown ();

    return 0;
}

static void print_usage ( GOptionContext *  context)

static

Definition at line 241 of file evince-thumbnailer.c.

{
    gchar *help;

    help = g_option_context_get_help (context, TRUE, NULL);
    g_print ("%s", help);
    g_free (help);
}

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static G_GNUC_NORETURN gpointer time_monitor ( gpointer  data)

static

Definition at line 63 of file evince-thumbnailer.c.

{
        const gchar *app_name;

        g_usleep (DEFAULT_SLEEP_TIME);

        if (finished)
                g_thread_exit (NULL);

        app_name = g_get_application_name ();
        if (app_name == NULL)
                app_name = g_get_prgname ();
        g_printerr ("%s couldn't process file: '%s'\n"
                    "Reason: Took too much time to process.\n",
                    app_name,
                    (const char *) data);

        exit (0);
}

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static void time_monitor_start ( const char *  input)

static

Definition at line 84 of file evince-thumbnailer.c.

{
        finished = FALSE;

        g_thread_new ("ThumbnailerTimer", time_monitor, (gpointer) input);
}

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static void time_monitor_stop ( void  )

static

Definition at line 92 of file evince-thumbnailer.c.

{
        finished = TRUE;
}

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Variable Documentation

const gchar** file_arguments

static

Definition at line 45 of file evince-thumbnailer.c.

gboolean finished = TRUE

static

Definition at line 41 of file evince-thumbnailer.c.

const GOptionEntry goption_options[]

static

Initial value:

= {
    { "size", 's', 0, G_OPTION_ARG_INT, &size, NULL, "SIZE" },
        { "no-limit", 'l', G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &time_limit, "Don't limit the thumbnailing time to 15 seconds", NULL },
    { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &file_arguments, NULL, "<input> <ouput>" },
    { NULL }
}

Definition at line 47 of file evince-thumbnailer.c.

gint size = THUMBNAIL_SIZE

static

Definition at line 43 of file evince-thumbnailer.c.

gboolean time_limit = TRUE

static

Definition at line 44 of file evince-thumbnailer.c.