dotemacs

epdfinfo.c (99693B)

---

 /* Copyright (C) 2013, 2014  Andreas Politz
  *
  * Author: Andreas Politz <politza@fh-trier.de>
  *
  * 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
 
 #include <config.h>
 
 #include <assert.h>
 #ifdef HAVE_ERR_H
 #  include <err.h>
 #endif
 #ifdef HAVE_ERROR_H
 #  include <error.h>
 #endif
 #include <glib.h>
 #include <poppler.h>
 #include <cairo.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <strings.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <png.h>
 #include <math.h>
 #include <regex.h>
 #include "synctex_parser.h"
 #include "epdfinfo.h"
 
 
 /* ================================================================== *
  * Helper Functions
  * ================================================================== */
 
 #ifndef HAVE_ERR_H
 /**
  * Print error message and quit.
  *
  * @param eval Return code
  * @param fmt Formatting string
  */
 static void
 err(int eval, const char *fmt, ...)
 {
   va_list args;
 
   fprintf (stderr, "epdfinfo: ");
   if (fmt != NULL)
     {
       va_start (args, fmt);
       vfprintf (stderr, fmt, args);
       va_end (args);
       fprintf (stderr, ": %s\n", strerror(errno));
     }
   else
     {
       fprintf (stderr, "\n");
     }
 
   fflush (stderr);
   exit (eval);
 }
 #endif
 
 #ifndef HAVE_GETLINE
 /**
  * Read one line from a file.
  *
  * @param lineptr Pointer to malloc() allocated buffer
  * @param n Pointer to size of buffer
  * @param stream File pointer to read from
  */
 static ssize_t
 getline(char **lineptr, size_t *n, FILE *stream)
 {
   size_t len = 0;
   int ch;
 
   if ((lineptr == NULL) || (n == NULL))
     {
       errno = EINVAL;
       return -1;
     }
 
   if (*lineptr == NULL)
     {
       *lineptr = malloc (128);
       *n = 128;
     }
 
   while ((ch = fgetc (stream)) != EOF)
     {
       (*lineptr)[len] = ch;
 
       if (++len >= *n)
         {
           *n += 128;
           *lineptr = realloc (*lineptr, *n);
         }
 
       if (ch == '\n')
         break;
     }
   (*lineptr)[len] = '\0';
 
   if (!len)
     {
       len = -1;
     }
 
   return len;
 }
 #endif
 
 /**
  * Free a list of command arguments.
  *
  * @param args An array of command arguments.
  * @param n The length of the array.
  */
 static void
 free_command_args (command_arg_t *args, size_t n)
 {
   if (! args)
     return;
 
   g_free (args);
 }
 
 /**
  * Free resources held by document.
  *
  * @param doc The document to be freed.
  */
 static void
 free_document (document_t *doc)
 {
   if (! doc)
     return;
 
   g_free (doc->filename);
   g_free (doc->passwd);
   if (doc->annotations.pages)
     {
       int npages = poppler_document_get_n_pages (doc->pdf);
       int i;
       for (i = 0; i < npages; ++i)
         {
           GList *item;
           GList *annots  = doc->annotations.pages[i];
           for (item = annots; item; item = item->next)
             {
               annotation_t *a = (annotation_t*) item->data;
               poppler_annot_mapping_free(a->amap);
               g_free (a->key);
               g_free (a);
             }
           g_list_free (annots);
         }
       g_hash_table_destroy (doc->annotations.keys);
       g_free (doc->annotations.pages);
     }
   g_object_unref (doc->pdf);
   g_free (doc);
 }
 
 /**
  * Parse a list of whitespace separated double values.
  *
  * @param str The input string.
  * @param values[out] Values are put here.
  * @param nvalues How many values to parse.
  *
  * @return TRUE, if str contained exactly nvalues, else FALSE.
  */
 static gboolean
 parse_double_list (const char *str, gdouble *values, size_t nvalues)
 {
   char *end;
   int i;
 
   if (! str)
     return FALSE;
 
   errno = 0;
   for (i = 0; i < nvalues; ++i)
     {
       gdouble n = g_ascii_strtod (str, &end);
 
       if (str == end || errno)
         return FALSE;
 
       values[i] = n;
       str = end;
     }
 
   if (*end)
     return FALSE;
 
   return TRUE;
 }
 
 static gboolean
 parse_rectangle (const char *str, PopplerRectangle *r)
 {
   gdouble values[4];
 
   if (! r)
     return FALSE;
 
   if (! parse_double_list (str, values, 4))
     return FALSE;
 
   r->x1 = values[0];
   r->y1 = values[1];
   r->x2 = values[2];
   r->y2 = values[3];
 
   return TRUE;
 }
 
 static gboolean
 parse_edges_or_position (const char *str, PopplerRectangle *r)
 {
   return (parse_rectangle (str, r)
           && r->x1 >= 0 && r->x1 <= 1
           && r->x2 <= 1
           && r->y1 >= 0 && r->y1 <= 1
           && r->y2 <= 1);
 }
 
 static gboolean
 parse_edges (const char *str, PopplerRectangle *r)
 {
   return (parse_rectangle (str, r)
           && r->x1 >= 0 && r->x1 <= 1
           && r->x2 >= 0 && r->x2 <= 1
           && r->y1 >= 0 && r->y1 <= 1
           && r->y2 >= 0 && r->y2 <= 1);
 }
 
 /**
  * Print a string properly escaped for a response.
  *
  * @param str The string to be printed.
  * @param suffix_char Append a newline if NEWLINE, a colon if COLON.
  */
 static void
 print_response_string (const char *str, enum suffix_char suffix)
 {
   if (str)
     {
       while (*str)
         {
           switch (*str)
             {
             case '\n':
               printf ("\\n");
               break;
             case '\\':
               printf ("\\\\");
               break;
             case ':':
               printf ("\\:");
               break;
             default:
               putchar (*str);
             }
           ++str;
         }
     }
 
   switch (suffix)
     {
     case NEWLINE:
       putchar ('\n');
       break;
     case COLON:
       putchar (':');
       break;
     default: ;
     }
 }
 
 
 /**
  * Print a formatted error response.
  *
  * @param fmt The printf-like format string.
  */
 static void
 printf_error_response (const char *fmt, ...)
 {
   va_list va;
   puts ("ERR");
   va_start (va, fmt);
   vprintf (fmt, va);
   va_end (va);
   puts ("\n.");
   fflush (stdout);
 }
 
 /**
  * Remove one trailing newline character.  Does nothing, if str does
  * not end with a newline.
  *
  * @param str The string.
  *
  * @return str with trailing newline removed.
  */
 static char*
 strchomp (char *str)
 {
   size_t length;
 
   if (! str)
     return str;
 
   length = strlen (str);
   if (str[length - 1] == '\n')
     str[length - 1] = '\0';
 
   return str;
 }
 
 /**
  * Create a new, temporary file and returns its name.
  *
  * @return The filename.
  */
 static char*
 mktempfile()
 {
   char *filename = NULL;
   int tries = 3;
   while (! filename && tries-- > 0)
     {
 
       filename =  tempnam(NULL, "epdfinfo");
       if (filename)
         {
           int fd = open(filename, O_CREAT | O_EXCL | O_RDONLY, S_IRUSR | S_IWUSR);
           if (fd > 0)
             close (fd);
           else
             {
               free (filename);
               filename = NULL;
             }
         }
     }
   if (! filename)
     fprintf (stderr, "Unable to create tempfile");
 
   return filename;
 }
 
 static void
 image_recolor (cairo_surface_t * surface, const PopplerColor * fg,
 	       const PopplerColor * bg)
 {
   /* uses a representation of a rgb color as follows:
      - a lightness scalar (between 0,1), which is a weighted average of r, g, b,
      - a hue vector, which indicates a radian direction from the grey axis,
      inside the equal lightness plane.
      - a saturation scalar between 0,1. It is 0 when grey, 1 when the color is
      in the boundary of the rgb cube.
    */
 
   const unsigned int page_width = cairo_image_surface_get_width (surface);
   const unsigned int page_height = cairo_image_surface_get_height (surface);
   const int rowstride = cairo_image_surface_get_stride (surface);
   unsigned char *image = cairo_image_surface_get_data (surface);
 
   /* RGB weights for computing lightness. Must sum to one */
   static const double a[] = { 0.30, 0.59, 0.11 };
 
   const double f = 65535.;
   const double rgb_fg[] = {
     fg->red / f, fg->green / f, fg->blue / f
   };
   const double rgb_bg[] = {
     bg->red / f, bg->green / f, bg->blue / f
   };
 
   const double rgb_diff[] = {
     rgb_bg[0] - rgb_fg[0],
     rgb_bg[1] - rgb_fg[1],
     rgb_bg[2] - rgb_fg[2]
   };
 
   unsigned int y;
   for (y = 0; y < page_height * rowstride; y += rowstride)
     {
       unsigned char *data = image + y;
 
       unsigned int x;
       for (x = 0; x < page_width; x++, data += 4)
 	{
 	  /* Careful. data color components blue, green, red. */
 	  const double rgb[3] = {
 	    (double) data[2] / 256.,
 	    (double) data[1] / 256.,
 	    (double) data[0] / 256.
 	  };
 
 	  /* compute h, s, l data   */
 	  double l = a[0] * rgb[0] + a[1] * rgb[1] + a[2] * rgb[2];
 
 	  /* linear interpolation between dark and light with color ligtness as
 	   * a parameter */
 	  data[2] =
 	    (unsigned char) round (255. * (l * rgb_diff[0] + rgb_fg[0]));
 	  data[1] =
 	    (unsigned char) round (255. * (l * rgb_diff[1] + rgb_fg[1]));
 	  data[0] =
 	    (unsigned char) round (255. * (l * rgb_diff[2] + rgb_fg[2]));
 	}
     }
 }
 
 /**
  * Render a PDF page.
  *
  * @param pdf The PDF document.
  * @param page The page to be rendered.
  * @param width The desired width of the image.
  *
  * @return A cairo_t context encapsulating the rendered image, or
  *         NULL, if rendering failed for some reason.
  */
 static cairo_surface_t*
 image_render_page(PopplerDocument *pdf, PopplerPage *page,
                   int width, gboolean do_render_annotaions,
                   const render_options_t *options)
 {
   cairo_t *cr = NULL;
   cairo_surface_t *surface = NULL;
   double pt_width, pt_height;
   int height;
   double scale = 1;
 
   if (! page || ! pdf)
     return NULL;
 
   if (width < 1)
     width = 1;
 
   poppler_page_get_size (page, &pt_width, &pt_height);
   scale = width / pt_width;
   height = (int) ((scale * pt_height) + 0.5);
 
   surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
                                         width, height);
 
   if (cairo_surface_status (surface) != CAIRO_STATUS_SUCCESS)
     {
       fprintf (stderr, "Failed to create cairo surface\n");
       goto error;
     }
 
   cr = cairo_create (surface);
   if (cairo_status(cr) != CAIRO_STATUS_SUCCESS)
     {
       fprintf (stderr, "Failed to create cairo handle\n");
       goto error;
     }
 
   cairo_translate (cr, 0, 0);
   cairo_scale (cr, scale, scale);
   /* Render w/o annotations. */
   if (! do_render_annotaions || (options && options->printed))
     poppler_page_render_for_printing_with_options
       (page, cr, POPPLER_PRINT_DOCUMENT);
   else
     poppler_page_render (page, cr) ;
   if (cairo_status(cr) != CAIRO_STATUS_SUCCESS)
     {
       fprintf (stderr, "Failed to render page\n");
       goto error;
     }
 
   /* This makes the colors look right. */
   cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
   cairo_set_source_rgb (cr, 1., 1., 1.);
 
   cairo_paint (cr);
 
   if (options && options->usecolors)
     image_recolor (surface, &options->fg, &options->bg);
 
   cairo_destroy (cr);
 
   return surface;
 
  error:
   if (surface != NULL)
     cairo_surface_destroy (surface);
   if (cr != NULL)
     cairo_destroy (cr);
   return NULL;
 }
 
 /**
  * Write an image to a filename.
  *
  * @param cr The cairo context encapsulating the image.
  * @param filename The filename to be written to.
  * @param type The desired image type.
  *
  * @return 1 if the image was written successfully, else 0.
  */
 static gboolean
 image_write (cairo_surface_t *surface, const char *filename, enum image_type type)
 {
 
   int i, j;
   unsigned char *data;
   int width, height;
   FILE *file = NULL;
   gboolean success = 0;
 
   if (! surface ||
       cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS)
     {
       fprintf (stderr, "Invalid cairo surface\n");
       return 0;
     }
 
   if (! (file = fopen (filename, "wb")))
     {
       fprintf (stderr, "Can not open file: %s\n", filename);
       return 0;
     }
 
   cairo_surface_flush (surface);
   width = cairo_image_surface_get_width (surface);
   height = cairo_image_surface_get_height (surface);
   data = cairo_image_surface_get_data (surface);
 
   switch (type)
     {
     case PPM:
       {
         unsigned char *buffer = g_malloc (width * height * 3);
         unsigned char *buffer_p = buffer;
 
         fprintf (file, "P6\n%d %d\n255\n", width, height);
         for (i = 0; i < width * height; ++i, data += 4, buffer_p += 3)
           ARGB_TO_RGB (buffer_p, data);
         fwrite (buffer, 1, width * height * 3, file);
         g_free (buffer);
         success = 1;
       }
       break;
     case PNG:
       {
         png_infop info_ptr = NULL;
         png_structp png_ptr = NULL;
         unsigned char *row = NULL;
 
         png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
         if (!png_ptr)
           goto finalize;
 
         info_ptr = png_create_info_struct(png_ptr);
         if (!info_ptr)
           goto finalize;
 
         if (setjmp(png_jmpbuf(png_ptr)))
           goto finalize;
 
         png_init_io (png_ptr, file);
         png_set_compression_level (png_ptr, 1);
         png_set_IHDR (png_ptr, info_ptr, width, height,
                       8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
                       PNG_COMPRESSION_TYPE_BASE,
                       PNG_FILTER_TYPE_DEFAULT);
 
         png_set_filter (png_ptr, PNG_FILTER_TYPE_BASE,
                         PNG_FILTER_NONE);
         png_write_info (png_ptr, info_ptr);
         row = g_malloc (3 * width);
         for (i = 0; i < height; ++i)
           {
             unsigned char *row_p = row;
             for (j = 0; j < width; ++j, data += 4, row_p += 3)
               {
                 ARGB_TO_RGB (row_p, data);
               }
             png_write_row (png_ptr, row);
           }
         png_write_end (png_ptr, NULL);
         success = 1;
       finalize:
         if (png_ptr)
           png_destroy_write_struct (&png_ptr, &info_ptr);
         if (row)
           g_free (row);
         if (! success)
           fprintf (stderr, "Error writing png data\n");
       }
       break;
     default:
       internal_error ("switch fell through");
     }
 
   fclose (file);
   return success;
 }
 
 static void
 image_write_print_response(cairo_surface_t *surface, enum image_type type)
 {
   char *filename = mktempfile ();
 
   perror_if_not (filename, "Unable to create temporary file");
   if (image_write (surface, filename, type))
     {
       OK_BEGIN ();
       print_response_string (filename, NEWLINE);
       OK_END ();
     }
   else
     {
       printf_error_response ("Unable to write image");
     }
   free (filename);
  error:
   return;
 }
 
 static void
 region_print (cairo_region_t *region, double width, double height)
 {
   int i;
 
   for (i = 0; i < cairo_region_num_rectangles (region); ++i)
     {
       cairo_rectangle_int_t r;
 
       cairo_region_get_rectangle (region, i, &r);
       printf ("%f %f %f %f",
               r.x / width,
               r.y / height,
               (r.x + r.width) / width,
               (r.y + r.height) / height);
       if (i < cairo_region_num_rectangles (region) - 1)
         putchar (':');
     }
   if (0 == cairo_region_num_rectangles (region))
     printf ("0.0 0.0 0.0 0.0");
 }
 
 /**
  * Return a string representation of a PopplerActionType.
  *
  * @param type The PopplerActionType.
  *
  * @return Its string representation.
  */
 static const char *
 xpoppler_action_type_string(PopplerActionType type)
 {
   switch (type)
     {
     case POPPLER_ACTION_UNKNOWN: return "unknown";
     case POPPLER_ACTION_NONE: return "none";
     case POPPLER_ACTION_GOTO_DEST: return "goto-dest";
     case POPPLER_ACTION_GOTO_REMOTE: return "goto-remote";
     case POPPLER_ACTION_LAUNCH: return "launch";
     case POPPLER_ACTION_URI: return "uri";
     case POPPLER_ACTION_NAMED: return "goto-dest"; /* actually "named" */
     case POPPLER_ACTION_MOVIE: return "movie";
     case POPPLER_ACTION_RENDITION: return "rendition";
     case POPPLER_ACTION_OCG_STATE: return "ocg-state";
     case POPPLER_ACTION_JAVASCRIPT: return "javascript";
     default: return "invalid";
     }
 }
 
 /**
  * Return a string representation of a PopplerAnnotType.
  *
  * @param type The PopplerAnnotType.
  *
  * @return Its string representation.
  */
 static const char *
 xpoppler_annot_type_string (PopplerAnnotType type)
 {
   switch (type)
     {
     case POPPLER_ANNOT_UNKNOWN: return "unknown";
     case POPPLER_ANNOT_TEXT: return "text";
     case POPPLER_ANNOT_LINK: return "link";
     case POPPLER_ANNOT_FREE_TEXT: return "free-text";
     case POPPLER_ANNOT_LINE: return "line";
     case POPPLER_ANNOT_SQUARE: return "square";
     case POPPLER_ANNOT_CIRCLE: return "circle";
     case POPPLER_ANNOT_POLYGON: return "polygon";
     case POPPLER_ANNOT_POLY_LINE: return "poly-line";
     case POPPLER_ANNOT_HIGHLIGHT: return "highlight";
     case POPPLER_ANNOT_UNDERLINE: return "underline";
     case POPPLER_ANNOT_SQUIGGLY: return "squiggly";
     case POPPLER_ANNOT_STRIKE_OUT: return "strike-out";
     case POPPLER_ANNOT_STAMP: return "stamp";
     case POPPLER_ANNOT_CARET: return "caret";
     case POPPLER_ANNOT_INK: return "ink";
     case POPPLER_ANNOT_POPUP: return "popup";
     case POPPLER_ANNOT_FILE_ATTACHMENT: return "file";
     case POPPLER_ANNOT_SOUND: return "sound";
     case POPPLER_ANNOT_MOVIE: return "movie";
     case POPPLER_ANNOT_WIDGET: return "widget";
     case POPPLER_ANNOT_SCREEN: return "screen";
     case POPPLER_ANNOT_PRINTER_MARK: return "printer-mark";
     case POPPLER_ANNOT_TRAP_NET: return "trap-net";
     case POPPLER_ANNOT_WATERMARK: return "watermark";
     case POPPLER_ANNOT_3D: return "3d";
     default: return "invalid";
     }
 }
 
 /**
  * Return a string representation of a PopplerAnnotTextState.
  *
  * @param type The PopplerAnnotTextState.
  *
  * @return Its string representation.
  */
 static const char *
 xpoppler_annot_text_state_string (PopplerAnnotTextState state)
 {
   switch (state)
     {
     case POPPLER_ANNOT_TEXT_STATE_MARKED: return "marked";
     case POPPLER_ANNOT_TEXT_STATE_UNMARKED: return "unmarked";
     case POPPLER_ANNOT_TEXT_STATE_ACCEPTED: return "accepted";
     case POPPLER_ANNOT_TEXT_STATE_REJECTED: return "rejected";
     case POPPLER_ANNOT_TEXT_STATE_CANCELLED: return "cancelled";
     case POPPLER_ANNOT_TEXT_STATE_COMPLETED: return "completed";
     case POPPLER_ANNOT_TEXT_STATE_NONE: return "none";
     case POPPLER_ANNOT_TEXT_STATE_UNKNOWN:
     default: return "unknown";
     }
 };
 
 static document_t*
 document_open (const epdfinfo_t *ctx, const char *filename,
                const char *passwd, GError **gerror)
 {
   char *uri;
   document_t *doc = g_hash_table_lookup (ctx->documents, filename);
 
   if (NULL != doc)
     return doc;
 
   doc = g_malloc0(sizeof (document_t));
   uri = g_filename_to_uri (filename, NULL, gerror);
   if (uri != NULL)
     doc->pdf = poppler_document_new_from_file(uri, passwd, gerror);
 
   if (NULL == doc->pdf)
     {
       g_free (doc);
       doc = NULL;
     }
   else
     {
       doc->filename = g_strdup (filename);
       doc->passwd = g_strdup (passwd);
       g_hash_table_insert (ctx->documents, doc->filename, doc);
     }
   g_free (uri);
   return doc;
 }
 
 /**
  * Split command args into a list of strings.
  *
  * @param args The colon separated list of arguments.
  * @param nargs[out] The number of returned arguments.
  *
  * @return The list of arguments, which should be freed by the caller.
  */
 static char **
 command_arg_split (const char *args, int *nargs)
 {
   char **list = g_malloc (sizeof (char*) * 16);
   int i = 0;
   size_t allocated = 16;
   char *buffer = NULL;
   gboolean last = FALSE;
 
   if (! args)
     goto theend;
 
   buffer = g_malloc (strlen (args) + 1);
 
   while (*args || last)
     {
       gboolean esc = FALSE;
       char *buffer_p = buffer;
 
       while (*args && (*args != ':' || esc))
         {
           if (esc)
             {
               if (*args == 'n')
                 {
                   ++args;
                   *buffer_p++ = '\n';
                 }
               else
                 {
                   *buffer_p++ = *args++;
                 }
               esc = FALSE;
             }
           else if (*args == '\\')
             {
               ++args;
               esc = TRUE;
             }
           else
             {
               *buffer_p++ = *args++;
             }
         }
 
       *buffer_p = '\0';
 
       if (i >= allocated)
         {
           allocated = 2 * allocated + 1;
           list = g_realloc (list, sizeof (char*) * allocated);
         }
       list[i++] = g_strdup (buffer);
 
       last = FALSE;
       if (*args)
         {
           ++args;
           if (! *args)
             last = TRUE;
         }
     }
 
  theend:
   g_free (buffer);
   *nargs = i;
 
   return list;
 }
 
 static gboolean
 command_arg_parse_arg (const epdfinfo_t *ctx, const char *arg,
                        command_arg_t *cmd_arg, command_arg_type_t type,
                        gchar **error_msg)
 {
   GError *gerror = NULL;
 
   if (! arg || !cmd_arg)
     return FALSE;
 
   switch (type)
     {
     case ARG_DOC:
       {
         document_t *doc = document_open (ctx, arg, NULL, &gerror);
         cerror_if_not (doc, error_msg,
                        "Error opening %s:%s", arg,
                        gerror ? gerror->message : "Unknown reason");
 
         cmd_arg->value.doc = doc;
         break;
       }
     case ARG_BOOL:
       cerror_if_not (! strcmp (arg, "0") || ! strcmp (arg, "1"),
                      error_msg, "Expected 0 or 1:%s", arg);
       cmd_arg->value.flag = *arg == '1';
       break;
     case ARG_NONEMPTY_STRING:
       cerror_if_not (*arg, error_msg, "Non-empty string expected");
       /* fall through */
     case ARG_STRING:
       cmd_arg->value.string = arg;
       break;
     case ARG_NATNUM:
       {
         char *endptr;
         long n = strtol (arg, &endptr, 0);
         cerror_if_not (! (*endptr || (n < 0)), error_msg,
                        "Expected natural number:%s", arg);
         cmd_arg->value.natnum = n;
       }
       break;
     case ARG_EDGES_OR_POSITION:
       {
         PopplerRectangle *r = &cmd_arg->value.rectangle;
         cerror_if_not (parse_edges_or_position (arg, r),
                        error_msg,
                        "Expected a relative position or rectangle: %s", arg);
       }
       break;
     case ARG_EDGES:
       {
         PopplerRectangle *r = &cmd_arg->value.rectangle;
         cerror_if_not (parse_edges (arg, r),
                        error_msg,
                        "Expected a relative rectangle: %s", arg);
       }
       break;
     case ARG_EDGE_OR_NEGATIVE:
     case ARG_EDGE:
       {
         char *endptr;
         double n = strtod (arg, &endptr);
         cerror_if_not (! (*endptr || (type != ARG_EDGE_OR_NEGATIVE && n < 0.0) || n > 1.0),
                        error_msg, "Expected a relative edge: %s", arg);
         cmd_arg->value.edge = n;
       }
       break;
     case ARG_COLOR:
       {
         guint r,g,b;
         cerror_if_not ((strlen (arg) == 7
                         && 3 == sscanf (arg, "#%2x%2x%2x", &r, &g, &b)),
                        error_msg, "Invalid color: %s", arg);
         cmd_arg->value.color.red = r << 8;
         cmd_arg->value.color.green = g << 8;
         cmd_arg->value.color.blue = b << 8;
       }
       break;
     case ARG_INVALID:
     default:
       internal_error ("switch fell through");
     }
 
   cmd_arg->type = type;
 
   return TRUE;
  error:
   if (gerror)
     {
       g_error_free (gerror);
       gerror = NULL;
     }
   return FALSE;
 }
 
 /**
  * Parse arguments for a command.
  *
  * @param ctx The epdfinfo context.
  * @param args A string holding the arguments.  This is either empty
  *             or the suffix of the command starting at the first
  *             colon after the command name.
  * @param len The length of args.
  * @param cmd The command for which the arguments should be parsed.
  *
  * @return
  */
 static command_arg_t*
 command_arg_parse(epdfinfo_t *ctx, char **args, int nargs,
                   const command_t *cmd, gchar **error_msg)
 {
   command_arg_t *cmd_args = g_malloc0 (cmd->nargs * sizeof (command_arg_t));
   int i;
 
   if (nargs < cmd->nargs - 1
       || (nargs == cmd->nargs - 1
           &&  cmd->args_spec[cmd->nargs - 1] != ARG_REST)
       || (nargs > cmd->nargs
           && (cmd->nargs == 0
               || cmd->args_spec[cmd->nargs - 1] != ARG_REST)))
     {
       if (error_msg)
         {
           *error_msg =
             g_strdup_printf ("Command `%s' expects %d argument(s), %d given",
                              cmd->name, cmd->nargs, nargs);
         }
       goto failure;
     }
 
   for (i = 0; i < cmd->nargs; ++i)
     {
       if (i == cmd->nargs - 1 && cmd->args_spec[i] == ARG_REST)
         {
           cmd_args[i].value.rest.args = args + i;
           cmd_args[i].value.rest.nargs = nargs - i;
           cmd_args[i].type = ARG_REST;
         }
       else if (i >= nargs
                || ! command_arg_parse_arg (ctx, args[i], cmd_args + i,
                                            cmd->args_spec[i], error_msg))
         {
           goto failure;
         }
     }
 
   return cmd_args;
 
  failure:
   free_command_args (cmd_args, cmd->nargs);
   return NULL;
 }
 
 static void
 command_arg_print(const command_arg_t *arg)
 {
   switch (arg->type)
     {
     case ARG_INVALID:
       printf ("[invalid]");
       break;
     case ARG_DOC:
       print_response_string (arg->value.doc->filename, NONE);
       break;
     case ARG_BOOL:
       printf ("%d", arg->value.flag ? 1 : 0);
       break;
     case ARG_NONEMPTY_STRING:   /* fall */
     case ARG_STRING:
       print_response_string (arg->value.string, NONE);
       break;
     case ARG_NATNUM:
       printf ("%ld", arg->value.natnum);
       break;
     case ARG_EDGE_OR_NEGATIVE:  /* fall */
     case ARG_EDGE:
       printf ("%f", arg->value.edge);
       break;
     case ARG_EDGES_OR_POSITION: /* fall */
     case ARG_EDGES:
       {
         const PopplerRectangle *r = &arg->value.rectangle;
         if (r->x2 < 0 && r->y2 < 0)
           printf ("%f %f", r->x1, r->y1);
         else
           printf ("%f %f %f %f", r->x1, r->y1, r->x2, r->y2);
         break;
       }
     case ARG_COLOR:
       {
         const PopplerColor *c = &arg->value.color;
         printf ("#%.2x%.2x%.2x", c->red >> 8,
                 c->green >> 8, c->blue >> 8);
         break;
       }
     case ARG_REST:
       {
         int i;
         for (i = 0; i < arg->value.rest.nargs; ++i)
           print_response_string (arg->value.rest.args[i], COLON);
         if (arg->value.rest.nargs > 0)
           print_response_string (arg->value.rest.args[i], NONE);
         break;
       }
     default:
       internal_error ("switch fell through");
     }
 }
 
 static size_t
 command_arg_type_size(command_arg_type_t type)
 {
   command_arg_t arg;
   switch (type)
     {
     case ARG_INVALID: return 0;
     case ARG_DOC: return sizeof (arg.value.doc);
     case ARG_BOOL: return sizeof (arg.value.flag);
     case ARG_NONEMPTY_STRING:   /* fall */
     case ARG_STRING: return sizeof (arg.value.string);
     case ARG_NATNUM: return sizeof (arg.value.natnum);
     case ARG_EDGE_OR_NEGATIVE:  /* fall */
     case ARG_EDGE: return sizeof (arg.value.edge);
     case ARG_EDGES_OR_POSITION: /* fall */
     case ARG_EDGES: return sizeof (arg.value.rectangle);
     case ARG_COLOR: return sizeof (arg.value.color);
     case ARG_REST: return sizeof (arg.value.rest);
     default:
       internal_error ("switch fell through");
       return 0;
     }
 }
 
 
 /* ------------------------------------------------------------------ *
  * PDF Actions
  * ------------------------------------------------------------------ */
 
 static gboolean
 action_is_handled (PopplerAction *action)
 {
   if (! action)
     return FALSE;
 
   switch (action->any.type)
     {
     case POPPLER_ACTION_GOTO_REMOTE:
     case POPPLER_ACTION_GOTO_DEST:
     case POPPLER_ACTION_NAMED:
       /* case POPPLER_ACTION_LAUNCH: */
     case POPPLER_ACTION_URI:
       return TRUE;
     default: ;
     }
   return FALSE;
 }
 
 static void
 action_print_destination (PopplerDocument *doc, PopplerAction *action)
 {
   PopplerDest *dest = NULL;
   gboolean free_dest = FALSE;
   double width, height, top;
   PopplerPage *page;
   int saved_stdin;
 
   if (action->any.type == POPPLER_ACTION_GOTO_DEST
       && action->goto_dest.dest->type == POPPLER_DEST_NAMED)
     {
       DISCARD_STDOUT (saved_stdin);
       /* poppler_document_find_dest reports errors to stdout, so
          discard them. */
       dest = poppler_document_find_dest
         (doc, action->goto_dest.dest->named_dest);
       UNDISCARD_STDOUT (saved_stdin);
       free_dest = TRUE;
     }
   else if (action->any.type == POPPLER_ACTION_NAMED)
 
     {
       DISCARD_STDOUT (saved_stdin);
       dest = poppler_document_find_dest (doc, action->named.named_dest);
       UNDISCARD_STDOUT (saved_stdin);
       free_dest = TRUE;
     }
 
   else if (action->any.type == POPPLER_ACTION_GOTO_REMOTE)
     {
       print_response_string (action->goto_remote.file_name, COLON);
       dest = action->goto_remote.dest;
     }
   else if (action->any.type == POPPLER_ACTION_GOTO_DEST)
     dest = action->goto_dest.dest;
 
   if (!dest
       || dest->type == POPPLER_DEST_UNKNOWN
       || dest->page_num < 1
       || dest->page_num > poppler_document_get_n_pages (doc))
     {
       printf (":");
       goto theend;
     }
 
   printf ("%d:", dest->page_num);
 
   if (action->type == POPPLER_ACTION_GOTO_REMOTE
       || NULL == (page = poppler_document_get_page (doc, dest->page_num - 1)))
     {
       goto theend;
     }
 
   poppler_page_get_size (page, &width, &height);
   g_object_unref (page);
   top = (height - dest->top) / height;
 
   /* adapted from xpdf */
   switch (dest->type)
     {
     case POPPLER_DEST_XYZ:
       if (dest->change_top)
         printf ("%f", top);
       break;
     case POPPLER_DEST_FIT:
     case POPPLER_DEST_FITB:
     case POPPLER_DEST_FITH:
     case POPPLER_DEST_FITBH:
       putchar ('0');
       break;
     case POPPLER_DEST_FITV:
     case POPPLER_DEST_FITBV:
     case POPPLER_DEST_FITR:
       printf ("%f", top);
       break;
     default: ;
     }
 
  theend:
   if (free_dest)
     poppler_dest_free (dest);
 }
 
 static void
 action_print (PopplerDocument *doc, PopplerAction *action)
 {
   if (! action_is_handled (action))
     return;
 
   print_response_string (xpoppler_action_type_string (action->any.type), COLON);
   print_response_string (action->any.title, COLON);
   switch (action->any.type)
     {
     case POPPLER_ACTION_GOTO_REMOTE:
     case POPPLER_ACTION_GOTO_DEST:
     case POPPLER_ACTION_NAMED:
       action_print_destination (doc, action);
       putchar ('\n');
       break;
     case POPPLER_ACTION_LAUNCH:
       print_response_string (action->launch.file_name, COLON);
       print_response_string (action->launch.params, NEWLINE);
       break;
     case POPPLER_ACTION_URI:
       print_response_string (action->uri.uri, NEWLINE);
       break;
     default:
       ;
     }
 }
 
 
 /* ------------------------------------------------------------------ *
  * PDF Annotations and Attachments
  * ------------------------------------------------------------------ */
 
 /* static gint
  * annotation_cmp_edges (const annotation_t *a1, const annotation_t *a2)
  * {
  *   PopplerRectangle *e1 = &a1->amap->area;
  *   PopplerRectangle *e2 = &a2->amap->area;
  *
  *   return (e1->y1 > e2->y1 ? -1
  *           : e1->y1 < e2->y1 ? 1
  *           : e1->x1 < e2->x1 ? -1
  *           : e1->x1 != e2->x1);
  * } */
 
 static GList*
 annoation_get_for_page (document_t *doc, gint pn)
 {
 
   GList *annot_list, *item;
   PopplerPage *page;
   gint i = 0;
   gint npages = poppler_document_get_n_pages (doc->pdf);
 
   if (pn < 1 || pn > npages)
     return NULL;
 
   if (! doc->annotations.pages)
     doc->annotations.pages = g_malloc0 (npages * sizeof(GList*));
 
   if (doc->annotations.pages[pn - 1])
     return doc->annotations.pages[pn - 1];
 
   if (! doc->annotations.keys)
     doc->annotations.keys = g_hash_table_new (g_str_hash, g_str_equal);
 
   page = poppler_document_get_page (doc->pdf, pn - 1);
   if (NULL == page)
     return NULL;
 
   annot_list = poppler_page_get_annot_mapping (page);
   for (item = annot_list; item; item = item->next)
     {
       PopplerAnnotMapping *map = (PopplerAnnotMapping *)item->data;
       gchar *key = g_strdup_printf ("annot-%d-%d", pn, i);
       annotation_t *a = g_malloc (sizeof (annotation_t));
       a->amap = map;
       a->key = key;
       doc->annotations.pages[pn - 1] =
         g_list_prepend (doc->annotations.pages[pn - 1], a);
       assert (NULL == g_hash_table_lookup (doc->annotations.keys, key));
       g_hash_table_insert (doc->annotations.keys, key, a);
       ++i;
     }
   g_list_free (annot_list);
   g_object_unref (page);
   return doc->annotations.pages[pn - 1];
 }
 
 static annotation_t*
 annotation_get_by_key (document_t *doc, const gchar *key)
 {
   if (! doc->annotations.keys)
     return NULL;
 
   return g_hash_table_lookup (doc->annotations.keys, key);
 }
 
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
 static cairo_region_t*
 annotation_markup_get_text_regions (PopplerPage *page, PopplerAnnotTextMarkup *a)
 {
   GArray *quads = poppler_annot_text_markup_get_quadrilaterals (a);
   int i;
   cairo_region_t *region = cairo_region_create ();
   gdouble height;
 
   poppler_page_get_size (page, NULL, &height);
 
   for (i = 0; i < quads->len; ++i)
     {
       PopplerQuadrilateral *q = &g_array_index (quads, PopplerQuadrilateral, i);
       cairo_rectangle_int_t r;
 
       q->p1.y = height - q->p1.y;
       q->p2.y = height - q->p2.y;
       q->p3.y = height - q->p3.y;
       q->p4.y = height - q->p4.y;
 
       r.x = (int) (MIN (q->p1.x, MIN (q->p2.x, MIN (q->p3.x, q->p4.x))) + 0.5);
       r.y = (int) (MIN (q->p1.y, MIN (q->p2.y, MIN (q->p3.y, q->p4.y))) + 0.5);
       r.width = (int) (MAX (q->p1.x, MAX (q->p2.x, MAX (q->p3.x, q->p4.x))) + 0.5)
                 - r.x;
       r.height = (int) (MAX (q->p1.y, MAX (q->p2.y, MAX (q->p3.y, q->p4.y))) + 0.5)
                  - r.y;
 
       cairo_region_union_rectangle (region, &r);
     }
   g_array_unref (quads);
   return region;
 }
 
 /**
  * Append quadrilaterals equivalent to region to an array.
  *
  * @param page The page of the annotation.  This is used to get the
  *             text regions and pagesize.
  * @param region The region to add.
  * @param garray[in,out] An array of PopplerQuadrilateral, where the
  *              new quadrilaterals will be appended.
  */
 static void
 annotation_markup_append_text_region (PopplerPage *page, PopplerRectangle *region,
                                       GArray *garray)
 {
   gdouble height;
   /* poppler_page_get_selection_region is deprecated w/o a
      replacement.  (poppler_page_get_selected_region returns a union
      of rectangles.) */
   GList *regions =
     poppler_page_get_selection_region (page, 1.0, POPPLER_SELECTION_GLYPH, region);
   GList *item;
 
   poppler_page_get_size (page, NULL, &height);
   for (item = regions; item; item = item->next)
     {
       PopplerRectangle *r = item->data;
       PopplerQuadrilateral q;
 
       q.p1.x = r->x1;
       q.p1.y = height - r->y1;
       q.p2.x = r->x2;
       q.p2.y = height - r->y1;
       q.p4.x = r->x2;
       q.p4.y = height - r->y2;
       q.p3.x = r->x1;
       q.p3.y = height - r->y2;
 
       g_array_append_val (garray, q);
     }
   g_list_free (regions);
 }
 
 #endif
 /**
  * Create a new annotation.
  *
  * @param doc The document for which to create it.
  * @param type The type of the annotation.
  * @param r The rectangle where annotation will end up on the page.
  *
  * @return The new annotation, or NULL, if the annotation type is
  *         not available.
  */
 static PopplerAnnot*
 annotation_new (const epdfinfo_t *ctx, document_t *doc, PopplerPage *page,
                 const char *type, PopplerRectangle *r,
                 const command_arg_t *rest, char **error_msg)
 {
 
   PopplerAnnot *a = NULL;
   int nargs = rest->value.rest.nargs;
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
   char * const *args = rest->value.rest.args;
   int i;
   GArray *garray = NULL;
   command_arg_t carg;
   double width, height;
   cairo_region_t *region = NULL;
 #endif
 
   if (! strcmp (type, "text"))
     {
       cerror_if_not (nargs == 0, error_msg, "%s", "Too many arguments");
       return poppler_annot_text_new (doc->pdf, r);
     }
 
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
   garray = g_array_new (FALSE, FALSE, sizeof (PopplerQuadrilateral));
   poppler_page_get_size (page, &width, &height);
   for (i = 0; i < nargs; ++i)
     {
       PopplerRectangle *rr = &carg.value.rectangle;
 
       error_if_not (command_arg_parse_arg (ctx, args[i], &carg,
                                            ARG_EDGES, error_msg));
       rr->x1 *= width; rr->x2 *= width;
       rr->y1 *= height; rr->y2 *= height;
       annotation_markup_append_text_region (page, rr, garray);
     }
   cerror_if_not (garray->len > 0, error_msg, "%s",
                  "Unable to create empty markup annotation");
 
   if (! strcmp (type, "highlight"))
     a = poppler_annot_text_markup_new_highlight (doc->pdf, r, garray);
   else if (! strcmp (type, "squiggly"))
     a = poppler_annot_text_markup_new_squiggly (doc->pdf, r, garray);
   else if (! strcmp (type, "strike-out"))
     a = poppler_annot_text_markup_new_strikeout (doc->pdf, r, garray);
   else if (! strcmp (type, "underline"))
     a = poppler_annot_text_markup_new_underline (doc->pdf, r, garray);
   else
     cerror_if_not (0, error_msg, "Unknown annotation type: %s", type);
 
 #endif
  error:
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
   if (garray) g_array_unref (garray);
   if (region) cairo_region_destroy (region);
 #endif
   return a;
 }
 
 static gboolean
 annotation_edit_validate (const epdfinfo_t *ctx, const command_arg_t *rest,
                           PopplerAnnot *annotation, char **error_msg)
 {
   int nargs = rest->value.rest.nargs;
   char * const *args = rest->value.rest.args;
   int i = 0;
   command_arg_t carg;
 
   const char* error_fmt =
     "Can modify `%s' property only for %s annotations";
 
   while (i < nargs)
     {
       command_arg_type_t atype = ARG_INVALID;
       const char *key = args[i++];
 
       cerror_if_not (i < nargs, error_msg, "Missing a value argument");
 
       if (! strcmp (key, "flags"))
         atype = ARG_NATNUM;
       else if (! strcmp (key, "color"))
         atype = ARG_COLOR;
       else if (! strcmp (key, "contents"))
         atype = ARG_STRING;
       else if (! strcmp (key, "edges"))
         atype = ARG_EDGES_OR_POSITION;
       else if (! strcmp (key, "label"))
         {
           cerror_if_not (POPPLER_IS_ANNOT_MARKUP (annotation), error_msg,
                          error_fmt, key, "markup");
           atype = ARG_STRING;
         }
       else if (! strcmp (key, "opacity"))
         {
           cerror_if_not (POPPLER_IS_ANNOT_MARKUP (annotation), error_msg,
                          error_fmt, key, "markup");
           atype = ARG_EDGE;
         }
       else if (! strcmp (key, "popup"))
         {
           cerror_if_not (POPPLER_IS_ANNOT_MARKUP (annotation), error_msg,
                          error_fmt, key, "markup");
           atype = ARG_EDGES;
         }
       else if (! strcmp (key, "popup-is-open"))
         {
           cerror_if_not (POPPLER_IS_ANNOT_MARKUP (annotation), error_msg,
                          error_fmt, key, "markup");
           atype = ARG_BOOL;
         }
       else if (! strcmp (key, "icon"))
         {
           cerror_if_not (POPPLER_IS_ANNOT_TEXT (annotation), error_msg,
                          error_fmt, key, "text");
           atype = ARG_STRING;
         }
       else if (! strcmp (key, "is-open"))
         {
           cerror_if_not (POPPLER_IS_ANNOT_TEXT (annotation), error_msg,
                          error_fmt, key, "text");
           atype = ARG_BOOL;
         }
       else
         {
           cerror_if_not (0, error_msg,
                          "Unable to modify property `%s'", key);
         }
 
       if (! command_arg_parse_arg (ctx, args[i++], &carg, atype, error_msg))
         return FALSE;
     }
 
   return TRUE;
 
  error:
   return FALSE;
 }
 
 static void
 annotation_print (const annotation_t *annot, /* const */ PopplerPage *page)
 {
   double width, height;
   PopplerAnnotMapping *m;
   const gchar *key;
   PopplerAnnot *a;
   PopplerAnnotMarkup *ma;
   PopplerAnnotText *ta;
   PopplerRectangle r;
   PopplerColor *color;
   gchar *text;
   gdouble opacity;
   cairo_region_t *region = NULL;
   GDate *date;
 
   if (! annot || ! page)
     return;
 
   m = annot->amap;
   key = annot->key;
   a = m->annot;
   poppler_page_get_size (page, &width, &height);
 
   r.x1 = m->area.x1;
   r.x2 = m->area.x2;
   r.y1 = height - m->area.y2;
   r.y2 = height - m->area.y1;
 
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
   if (POPPLER_IS_ANNOT_TEXT_MARKUP (a))
     {
       region = annotation_markup_get_text_regions (page, POPPLER_ANNOT_TEXT_MARKUP (a));
       perror_if_not (region, "%s", "Unable to extract annotation's text regions");
     }
 #endif
 
   /* >>> Any Annotation >>> */
   /* Page */
   printf ("%d:", poppler_page_get_index (page) + 1);
   /* Area */
   printf ("%f %f %f %f:", r.x1 / width, r.y1 / height
           , r.x2 / width, r.y2 / height);
 
   /* Type */
   printf ("%s:", xpoppler_annot_type_string (poppler_annot_get_annot_type (a)));
   /* Internal Key */
   print_response_string (key, COLON);
 
   /* Flags */
   printf ("%d:", poppler_annot_get_flags (a));
 
   /* Color */
   color = poppler_annot_get_color (a);
   if (color)
     {
       /* Reduce 2 Byte to 1 Byte color space  */
       printf ("#%.2x%.2x%.2x", (color->red >> 8)
               , (color->green >> 8)
               , (color->blue >> 8));
       g_free (color);
     }
 
   putchar (':');
 
   /* Text Contents */
   text = poppler_annot_get_contents (a);
   print_response_string (text, COLON);
   g_free (text);
 
   /* Modified Date */
   text = poppler_annot_get_modified (a);
   print_response_string (text, NONE);
   g_free (text);
 
   /* <<< Any Annotation <<< */
 
   /* >>> Markup Annotation >>> */
   if (! POPPLER_IS_ANNOT_MARKUP (a))
     {
       putchar ('\n');
       goto theend;
     }
 
   putchar (':');
   ma = POPPLER_ANNOT_MARKUP (a);
   /* Label */
   text = poppler_annot_markup_get_label (ma);
   print_response_string (text, COLON);
   g_free (text);
 
   /* Subject */
   text = poppler_annot_markup_get_subject (ma);
   print_response_string (text, COLON);
   g_free (text);
 
   /* Opacity */
   opacity = poppler_annot_markup_get_opacity (ma);
   printf ("%f:", opacity);
 
   /* Popup (Area + isOpen) */
   if (poppler_annot_markup_has_popup (ma)
       && poppler_annot_markup_get_popup_rectangle (ma, &r))
     {
       gdouble tmp = r.y1;
       r.y1 = height - r.y2;
       r.y2 = height - tmp;
       printf ("%f %f %f %f:%d:", r.x1 / width, r.y1 / height
               , r.x2 / width, r.y2 / height
               , poppler_annot_markup_get_popup_is_open (ma) ? 1 : 0);
 
     }
   else
     printf ("::");
 
   /* Creation Date */
   date = poppler_annot_markup_get_date (ma);
   if (date != NULL && g_date_valid(date))
     {
       gchar datebuf[128];
       g_date_strftime (datebuf, 127, "%x", date);
       print_response_string (datebuf, NONE);
       g_date_free (date);
     }
 
   /* <<< Markup Annotation <<< */
 
   /* >>>  Text Annotation >>> */
   if (POPPLER_IS_ANNOT_TEXT (a))
     {
       putchar (':');
       ta = POPPLER_ANNOT_TEXT (a);
       /* Text Icon */
       text = poppler_annot_text_get_icon (ta);
       print_response_string (text, COLON);
       g_free (text);
       /* Text State */
       printf ("%s:%d",
               xpoppler_annot_text_state_string (poppler_annot_text_get_state (ta)),
               poppler_annot_text_get_is_open (ta));
     }
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
   /* <<< Text Annotation <<< */
   else if (POPPLER_IS_ANNOT_TEXT_MARKUP (a))
     {
       /* >>> Markup Text Annotation >>> */
       putchar (':');
       region_print (region, width, height);
       /* <<< Markup Text Annotation <<< */
     }
 #endif
   putchar ('\n');
  theend:
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
  error:
 #endif
   if (region) cairo_region_destroy (region);
 }
 
 static void
 attachment_print (PopplerAttachment *att, const char *id, gboolean do_save)
 {
   time_t time;
 
   print_response_string (id, COLON);
   print_response_string (att->name, COLON);
   print_response_string (att->description, COLON);
   if (att->size + 1 != 0)
     printf ("%" G_GSIZE_FORMAT ":", att->size);
   else
     printf ("-1:");
   time = (time_t) att->mtime;
   print_response_string (time > 0 ? strchomp (ctime (&time)) : "", COLON);
   time = (time_t) att->ctime;
   print_response_string (time > 0 ? strchomp (ctime (&time)) : "", COLON);
   print_response_string (att->checksum ? att->checksum->str : "" , COLON);
   if (do_save)
     {
       char *filename = mktempfile ();
       GError *error = NULL;
       if (filename)
         {
           if (! poppler_attachment_save (att, filename, &error))
             {
               fprintf (stderr, "Writing attachment failed: %s"
                        , error ? error->message : "reason unknown");
               if (error)
                 g_free (error);
             }
           else
             {
               print_response_string (filename, NONE);
             }
           free (filename);
         }
     }
   putchar ('\n');
 }
 
 
 
 /* ================================================================== *
  * Server command implementations
  * ================================================================== */
 
 /* Name: features
    Args: None
    Returns: A list of compile-time features.
    Errors: None
 */
 
 const command_arg_type_t cmd_features_spec[] = {};
 
 static void
 cmd_features (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   const char *features[] = {
 #ifdef HAVE_POPPLER_FIND_OPTS
     "case-sensitive-search",
 #else
     "no-case-sensitive-search",
 #endif
 #ifdef HAVE_POPPLER_ANNOT_WRITE
     "writable-annotations",
 #else
     "no-writable-annotations",
 #endif
 #ifdef HAVE_POPPLER_ANNOT_MARKUP
     "markup-annotations"
 #else
     "no-markup-annotations"
 #endif
   };
   int i;
   OK_BEGIN ();
   for (i = 0; i < G_N_ELEMENTS (features); ++i)
     {
       printf ("%s", features[i]);
       if (i < G_N_ELEMENTS (features) - 1)
         putchar (':');
     }
   putchar ('\n');
   OK_END ();
 }
 
 
 /* Name: open
    Args: filename password
    Returns: Nothing
    Errors: If file can't be opened or is not a PDF document.
 */
 
 const command_arg_type_t cmd_open_spec[] =
   {
     ARG_NONEMPTY_STRING,        /* filename */
     ARG_STRING,                 /* password */
   };
 
 static void
 cmd_open (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   const char *filename = args[0].value.string;
   const char *passwd = args[1].value.string;
   GError *gerror = NULL;
   document_t *doc;
 
   if (! *passwd)
     passwd = NULL;
 
   doc = document_open(ctx, filename, passwd, &gerror);
   perror_if_not (doc, "Error opening %s:%s", filename,
                 gerror ? gerror->message : "unknown error");
   OK ();
 
  error:
   if (gerror)
     {
       g_error_free (gerror);
       gerror = NULL;
     }
 }
 
 /* Name: close
    Args: filename
    Returns: 1 if file was open, otherwise 0.
    Errors: None
 */
 
 const command_arg_type_t cmd_close_spec[] =
   {
     ARG_NONEMPTY_STRING         /* filename */
   };
 
 static void
 cmd_close (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = g_hash_table_lookup(ctx->documents, args->value.string);
 
   g_hash_table_remove (ctx->documents, args->value.string);
   free_document (doc);
   OK_BEGIN ();
   puts (doc ? "1" : "0");
   OK_END ();
 }
 
 /* Name: closeall
    Args: None
    Returns: Nothing
    Errors: None
 */
 static void
 cmd_closeall (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   GHashTableIter iter;
   gpointer key, value;
 
   g_hash_table_iter_init (&iter, ctx->documents);
   while (g_hash_table_iter_next (&iter, &key, &value))
     {
       document_t *doc = (document_t*) value;
       free_document (doc);
       g_hash_table_iter_remove (&iter);
     }
   OK ();
 }
 
 
 const command_arg_type_t cmd_search_regexp_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* first page */
     ARG_NATNUM,                 /* last page */
     ARG_NONEMPTY_STRING,        /* regexp */
     ARG_NATNUM,                 /* compile flags */
     ARG_NATNUM                  /* match flags */
   };
 
 static void
 cmd_search_regexp(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int first = args[1].value.natnum;
   int last = args[2].value.natnum;
   const gchar *regexp = args[3].value.string;
   GRegexCompileFlags cflags = args[4].value.natnum;
   GRegexMatchFlags mflags = args[5].value.natnum;
   double width, height;
   int pn;
   GError *gerror = NULL;
   GRegex *re = NULL;
 
   NORMALIZE_PAGE_ARG (doc, &first, &last);
 
   re = g_regex_new (regexp, cflags, mflags, &gerror);
   perror_if_not (NULL == gerror, "Invalid regexp: %s", gerror->message);
 
   OK_BEGIN ();
   for (pn = first; pn <= last; ++pn)
     {
       PopplerPage *page = poppler_document_get_page(doc, pn - 1);
       char *text;
       PopplerRectangle *rectangles = NULL;
       guint nrectangles;
       GMatchInfo *match = NULL;
 
       if (! page)
         continue;
 
       text = poppler_page_get_text (page);
       poppler_page_get_text_layout (page, &rectangles, &nrectangles);
       poppler_page_get_size (page, &width, &height);
       g_regex_match (re, text, 0, &match);
 
       while (g_match_info_matches (match))
         {
           const double scale = 100.0;
           gint start, end, ustart, ulen;
           gchar *string = NULL;
           gchar *line = NULL;
           int i;
 
           /* Does this ever happen ? */
           if (! g_match_info_fetch_pos (match, 0, &start, &end))
             continue;
 
           string = g_match_info_fetch (match, 0);
           ustart = g_utf8_strlen (text, start);
           ulen = g_utf8_strlen (string, -1);
 
           cairo_region_t *region = cairo_region_create ();
           /* Merge matched glyph rectangles. Scale them so we're able
              to use cairo . */
           if (ulen > 0)
             {
               assert (ustart < nrectangles
                       && ustart + ulen <= nrectangles);
               line = poppler_page_get_selected_text
                      (page, POPPLER_SELECTION_LINE, rectangles + ustart);
 
               for (i = ustart; i < ustart + ulen; ++i)
                 {
                   PopplerRectangle *r = rectangles + i;
                   cairo_rectangle_int_t c;
 
                   c.x = (int) (scale * r->x1 + 0.5);
                   c.y = (int) (scale * r->y1 + 0.5);
                   c.width = (int) (scale * (r->x2 - r->x1) + 0.5);
                   c.height = (int) (scale * (r->y2 - r->y1) + 0.5);
 
                   cairo_region_union_rectangle (region, &c);
                 }
 
             }
 
           printf ("%d:", pn);
           print_response_string (string, COLON);
           print_response_string (strchomp (line), COLON);
           region_print (region, width * scale, height * scale);
           putchar ('\n');
           cairo_region_destroy (region);
           g_free (string);
           g_free (line);
           g_match_info_next (match, NULL);
         }
       g_free (rectangles);
       g_object_unref (page);
       g_free (text);
       g_match_info_free (match);
     }
   OK_END ();
 
  error:
   if (re) g_regex_unref (re);
   if (gerror) g_error_free (gerror);
 }
 
 const command_arg_type_t cmd_regexp_flags_spec[] =
   {
   };
 
 static void
 cmd_regexp_flags (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   OK_BEGIN ();
   printf ("caseless:%d\n", G_REGEX_CASELESS);
   printf ("multiline:%d\n", G_REGEX_MULTILINE);
   printf ("dotall:%d\n", G_REGEX_DOTALL);
   printf ("extended:%d\n", G_REGEX_EXTENDED);
   printf ("anchored:%d\n", G_REGEX_ANCHORED);
   printf ("dollar-endonly:%d\n", G_REGEX_DOLLAR_ENDONLY);
   printf ("ungreedy:%d\n", G_REGEX_UNGREEDY);
   printf ("raw:%d\n", G_REGEX_RAW);
   printf ("no-auto-capture:%d\n", G_REGEX_NO_AUTO_CAPTURE);
   printf ("optimize:%d\n", G_REGEX_OPTIMIZE);
   printf ("dupnames:%d\n", G_REGEX_DUPNAMES);
   printf ("newline-cr:%d\n", G_REGEX_NEWLINE_CR);
   printf ("newline-lf:%d\n", G_REGEX_NEWLINE_LF);
   printf ("newline-crlf:%d\n", G_REGEX_NEWLINE_CRLF);
 
   printf ("match-anchored:%d\n", G_REGEX_MATCH_ANCHORED);
   printf ("match-notbol:%d\n", G_REGEX_MATCH_NOTBOL);
   printf ("match-noteol:%d\n", G_REGEX_MATCH_NOTEOL);
   printf ("match-notempty:%d\n", G_REGEX_MATCH_NOTEMPTY);
   printf ("match-partial:%d\n", G_REGEX_MATCH_PARTIAL);
   printf ("match-newline-cr:%d\n", G_REGEX_MATCH_NEWLINE_CR);
   printf ("match-newline-lf:%d\n", G_REGEX_MATCH_NEWLINE_LF);
   printf ("match-newline-crlf:%d\n", G_REGEX_MATCH_NEWLINE_CRLF);
   printf ("match-newline-any:%d\n", G_REGEX_MATCH_NEWLINE_ANY);
 
   OK_END ();
 }
 
 
 const command_arg_type_t cmd_search_string_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* first page */
     ARG_NATNUM,                 /* last page */
     ARG_NONEMPTY_STRING,        /* search string */
     ARG_BOOL,                   /* ignore-case */
   };
 
 static void
 cmd_search_string(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int first = args[1].value.natnum;
   int last = args[2].value.natnum;
   const char *string = args[3].value.string;
   gboolean ignore_case = args[4].value.flag;
   GList *list, *item;
   double width, height;
   int pn;
 #ifdef HAVE_POPPLER_FIND_OPTS
   PopplerFindFlags flags = ignore_case ? 0 : POPPLER_FIND_CASE_SENSITIVE;
 #endif
 
   NORMALIZE_PAGE_ARG (doc, &first, &last);
   OK_BEGIN ();
   for (pn = first; pn <= last; ++pn)
     {
       PopplerPage *page = poppler_document_get_page(doc, pn - 1);
 
       if (! page)
         continue;
 
 #ifdef HAVE_POPPLER_FIND_OPTS
       list = poppler_page_find_text_with_options(page, string, flags);
 #else
       list = poppler_page_find_text(page, string);
 #endif
 
       poppler_page_get_size (page, &width, &height);
 
       for (item = list; item; item = item->next)
         {
           gchar *line, *match;
           PopplerRectangle *r = item->data;
           gdouble y1 =  r->y1;
 
           r->y1 = height - r->y2;
           r->y2 = height - y1;
 
           printf ("%d:", pn);
           line = strchomp (poppler_page_get_selected_text
                            (page, POPPLER_SELECTION_LINE, r));
           match = strchomp (poppler_page_get_selected_text
                            (page, POPPLER_SELECTION_GLYPH, r));
           print_response_string (match, COLON);
           print_response_string (line, COLON);
           printf ("%f %f %f %f\n",
                   r->x1 / width, r->y1 / height,
                   r->x2 / width, r->y2 / height);
           g_free (line);
           g_free (match);
           poppler_rectangle_free (r);
         }
       g_list_free (list);
       g_object_unref (page);
     }
   OK_END ();
 }
 
 /* Name: metadata
    Args: filename
    Returns: PDF's metadata
    Errors: None
 
    title author subject keywords creator producer pdf-version create-date mod-date
 
    Dates are in seconds since the epoche.
 
 */
 
 const command_arg_type_t cmd_metadata_spec[] =
   {
     ARG_DOC,
   };
 
 static void
 cmd_metadata (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   time_t date;
   gchar *md[6];
   gchar *title;
   int i;
   char *time_str;
 
   OK_BEGIN ();
 
   title = poppler_document_get_title (doc);
   print_response_string (title, COLON);
   g_free (title);
 
   md[0] = poppler_document_get_author (doc);
   md[1] = poppler_document_get_subject (doc);
   md[2] = poppler_document_get_keywords (doc);
   md[3] = poppler_document_get_creator (doc);
   md[4] = poppler_document_get_producer (doc);
   md[5] = poppler_document_get_pdf_version_string (doc);
 
   for (i = 0; i < 6; ++i)
     {
       print_response_string (md[i], COLON);
       g_free (md[i]);
     }
 
   date = poppler_document_get_creation_date (doc);
   time_str = strchomp (ctime (&date));
   print_response_string (time_str ? time_str : "", COLON);
   date = poppler_document_get_modification_date (doc);
   time_str = strchomp (ctime (&date));
   print_response_string (time_str ? time_str : "", NEWLINE);
   OK_END ();
 }
 
 /* Name: outline
    Args: filename
 
    Returns: The documents outline (or index) as a, possibly empty,
    list of records:
 
    tree-level ACTION
 
    See cmd_pagelinks for how ACTION is constructed.
 
    Errors: None
 */
 
 static void
 cmd_outline_walk (PopplerDocument *doc, PopplerIndexIter *iter, int depth)
 {
   do
     {
       PopplerIndexIter *child;
       PopplerAction *action = poppler_index_iter_get_action (iter);
 
       if (! action)
         continue;
 
       if (action_is_handled (action))
         {
           printf ("%d:", depth);
           action_print (doc, action);
         }
 
       child = poppler_index_iter_get_child (iter);
       if (child)
         {
           cmd_outline_walk (doc, child, depth + 1);
         }
       poppler_action_free (action);
       poppler_index_iter_free (child);
     } while (poppler_index_iter_next (iter));
 }
 
 const command_arg_type_t cmd_outline_spec[] =
   {
     ARG_DOC,
   };
 
 static void
 cmd_outline (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerIndexIter *iter = poppler_index_iter_new (args->value.doc->pdf);
   OK_BEGIN ();
   if (iter)
     {
       cmd_outline_walk (args->value.doc->pdf, iter, 1);
       poppler_index_iter_free (iter);
     }
   OK_END ();
 }
 
 /* Name: quit
    Args: None
    Returns: Nothing
    Errors: None
 
    Close all documents and exit.
 */
 
 
 const command_arg_type_t cmd_quit_spec[] = {};
 
 static void
 cmd_quit (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   cmd_closeall (ctx, args);
   exit (EXIT_SUCCESS);
 }
 
 /* Name: number-of-pages
    Args: filename
    Returns: The number of pages.
    Errors: None
 */
 
 
 const command_arg_type_t cmd_number_of_pages_spec[] =
   {
     ARG_DOC
   };
 
 static void
 cmd_number_of_pages (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   int npages = poppler_document_get_n_pages (args->value.doc->pdf);
   OK_BEGIN ();
   printf ("%d\n", npages);
   OK_END ();
 }
 
 /* Name: pagelinks
    Args: filename page
    Returns: A list of linkmaps:
 
    edges ACTION ,
 
    where ACTION is one of
 
    'goto-dest' title page top
    'goto-remote' title filename page top
    'uri' title URI
    'launch' title program arguments
 
    top is desired vertical position, filename is the target PDF of the
    `goto-remote' link.
 
    Errors: None
 */
 
 
 const command_arg_type_t cmd_pagelinks_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM                  /* page number */
   };
 
 static void
 cmd_pagelinks(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   PopplerPage *page = NULL;
   int pn = args[1].value.natnum;
   double width, height;
   GList *link_map = NULL, *item;
 
   page = poppler_document_get_page (doc, pn - 1);
   perror_if_not (page, "No such page %d", pn);
   poppler_page_get_size (page, &width, &height);
   link_map = poppler_page_get_link_mapping (page);
 
   OK_BEGIN ();
   for (item = g_list_last (link_map); item; item = item->prev)
     {
 
       PopplerLinkMapping *link = item->data;
       PopplerRectangle *r = &link->area;
       gdouble y1 = r->y1;
       /* LinkMappings have a different gravity. */
       r->y1 = height - r->y2;
       r->y2 = height - y1;
 
       if (! action_is_handled (link->action))
         continue;
 
       printf ("%f %f %f %f:",
               r->x1 / width, r->y1 / height,
               r->x2 / width, r->y2 / height);
       action_print (doc, link->action);
     }
   OK_END ();
  error:
   if (page) g_object_unref (page);
   if (link_map) poppler_page_free_link_mapping (link_map);
 }
 
 /* Name: gettext
    Args: filename page edges selection-style
    Returns: The selection's text.
    Errors: If page is out of range.
 
    For the selection-style argument see getselection command.
 */
 
 
 const command_arg_type_t cmd_gettext_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     ARG_EDGES,                  /* selection */
     ARG_NATNUM                  /* selection-style */
   };
 
 static void
 cmd_gettext(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int pn = args[1].value.natnum;
   PopplerRectangle r = args[2].value.rectangle;
   int selection_style = args[3].value.natnum;
   PopplerPage *page = NULL;
   double width, height;
   gchar *text = NULL;
 
   switch (selection_style)
     {
     case POPPLER_SELECTION_GLYPH: break;
     case POPPLER_SELECTION_LINE: break;
     case POPPLER_SELECTION_WORD: break;
     default: selection_style = POPPLER_SELECTION_GLYPH;
     }
 
   page = poppler_document_get_page (doc, pn - 1);
   perror_if_not (page, "No such page %d", pn);
   poppler_page_get_size (page, &width, &height);
   r.x1 = r.x1 * width;
   r.x2 = r.x2 * width;
   r.y1 = r.y1 * height;
   r.y2 = r.y2 * height;
   /* printf ("%f %f %f %f , %f %f\n", r.x1, r.y1, r.x2, r.y2, width, height); */
   text = poppler_page_get_selected_text (page, selection_style, &r);
 
   OK_BEGIN ();
   print_response_string (text, NEWLINE);
   OK_END ();
 
  error:
   g_free (text);
   if (page) g_object_unref (page);
 }
 
 /* Name: getselection
    Args: filename page edges selection-selection_style
    Returns: The selection's text.
    Errors: If page is out of range.
 
    selection-selection_style should be as follows.
 
    0 (POPPLER_SELECTION_GLYPH)
 	glyph is the minimum unit for selection
 
    1 (POPPLER_SELECTION_WORD)
 	word is the minimum unit for selection
 
    2 (POPPLER_SELECTION_LINE)
 	line is the minimum unit for selection
 */
 
 
 const command_arg_type_t cmd_getselection_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     ARG_EDGES,       /* selection */
     ARG_NATNUM                  /* selection-style */
   };
 
 static void
 cmd_getselection (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int pn = args[1].value.natnum;
   PopplerRectangle r = args[2].value.rectangle;
   int selection_style = args[3].value.natnum;
   gdouble width, height;
   cairo_region_t *region = NULL;
   PopplerPage *page = NULL;
   int i;
 
   switch (selection_style)
     {
     case POPPLER_SELECTION_GLYPH: break;
     case POPPLER_SELECTION_LINE: break;
     case POPPLER_SELECTION_WORD: break;
     default: selection_style = POPPLER_SELECTION_GLYPH;
     }
 
   page = poppler_document_get_page (doc, pn - 1);
   perror_if_not (page, "No such page %d", pn);
   poppler_page_get_size (page, &width, &height);
 
   r.x1 = r.x1 * width;
   r.x2 = r.x2 * width;
   r.y1 = r.y1 * height;
   r.y2 = r.y2 * height;
 
   region = poppler_page_get_selected_region (page, 1.0, selection_style, &r);
 
   OK_BEGIN ();
   for (i = 0; i < cairo_region_num_rectangles (region); ++i)
     {
       cairo_rectangle_int_t r;
 
       cairo_region_get_rectangle (region, i, &r);
       printf ("%f %f %f %f\n",
               r.x / width,
               r.y / height,
               (r.x + r.width) / width,
               (r.y + r.height) / height);
     }
   OK_END ();
 
  error:
   if (region) cairo_region_destroy (region);
   if (page) g_object_unref (page);
 }
 
 /* Name: pagesize
    Args: filename page
    Returns: width height
    Errors: If page is out of range.
 */
 
 
 const command_arg_type_t cmd_pagesize_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM                  /* page number */
   };
 
 static void
 cmd_pagesize(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int pn = args[1].value.natnum;
   PopplerPage *page = NULL;
   double width, height;
 
 
   page = poppler_document_get_page (doc, pn - 1);
   perror_if_not (page, "No such page %d", pn);
   poppler_page_get_size (page, &width, &height);
 
   OK_BEGIN ();
   printf ("%f:%f\n", width, height);
   OK_END ();
 
  error:
   if (page) g_object_unref (page);
 }
 
 /* Annotations */
 
 /* Name: getannots
    Args: filename firstpage lastpage
    Returns: The list of annotations of this page.
 
    For all annotations
 
    page edges type key flags color contents mod-date
 
    ,where
 
    name is a document-unique name,
    flags is PopplerAnnotFlag bitmask,
    color is 3-byte RGB hex number and
 
    Then
 
    label subject opacity popup-edges popup-is-open create-date
 
    if this is a markup annotation and additionally
 
    text-icon text-state
 
    for markup text annotations.
 
    Errors: If page is out of range.
 */
 
 
 const command_arg_type_t cmd_getannots_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* first page */
     ARG_NATNUM                  /* last page */
   };
 
 static void
 cmd_getannots(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   gint first = args[1].value.natnum;
   gint last = args[2].value.natnum;
   GList *list;
   gint pn;
 
   first = MAX(1, first);
   if (last <= 0)
     last = poppler_document_get_n_pages (doc);
   else
     last = MIN(last, poppler_document_get_n_pages (doc));
 
   OK_BEGIN ();
   for (pn = first; pn <= last; ++pn)
     {
       GList *annots = annoation_get_for_page (args->value.doc, pn);
       PopplerPage *page = poppler_document_get_page (doc, pn - 1);
 
       if (! page)
         continue;
 
       for (list = annots; list; list = list->next)
         {
           annotation_t *annot = (annotation_t *)list->data;
           annotation_print (annot, page);
         }
       g_object_unref (page);
     }
   OK_END ();
 }
 
 /* Name: getannot
    Args: filename name
    Returns: The annotation for name, see cmd_getannots.
    Errors: If no annotation named ,name' exists.
 */
 
 
 const command_arg_type_t cmd_getannot_spec[] =
   {
     ARG_DOC,
     ARG_NONEMPTY_STRING,        /* annotation's key */
   };
 
 static void
 cmd_getannot (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args->value.doc;
   const gchar *key = args[1].value.string;
   PopplerPage *page = NULL;
   annotation_t *a = annotation_get_by_key (doc, key);
   gint index;
 
   perror_if_not (a, "No such annotation: %s", key);
   index = poppler_annot_get_page_index (a->amap->annot);
   if (index >= 0)
     page = poppler_document_get_page (doc->pdf, index);
   perror_if_not (page, "Unable to get page %d", index + 1);
 
   OK_BEGIN ();
   annotation_print (a, page);
   OK_END ();
 
  error:
   if (page) g_object_unref (page);
 }
 
 /* Name: getannot_attachment
    Args: filename name [output-filename]
    Returns: name description size mtime ctime output-filename
    Errors: If no annotation named ,name' exists or output-filename is
    not writable.
 */
 
 
 const command_arg_type_t cmd_getattachment_from_annot_spec[] =
   {
     ARG_DOC,
     ARG_NONEMPTY_STRING,        /* annotation's name */
     ARG_BOOL                    /* save attachment */
   };
 
 static void
 cmd_getattachment_from_annot (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args->value.doc;
   const gchar *key = args[1].value.string;
   gboolean do_save = args[2].value.flag;
   PopplerAttachment *att = NULL;
   annotation_t *a = annotation_get_by_key (doc, key);
   gchar *id = NULL;
 
   perror_if_not (a, "No such annotation: %s", key);
   perror_if_not (POPPLER_IS_ANNOT_FILE_ATTACHMENT (a->amap->annot),
                 "Not a file annotation: %s", key);
   att = poppler_annot_file_attachment_get_attachment
         (POPPLER_ANNOT_FILE_ATTACHMENT (a->amap->annot));
   perror_if_not (att, "Unable to get attachment: %s", key);
   id = g_strdup_printf ("attachment-%s", key);
 
   OK_BEGIN ();
   attachment_print (att, id, do_save);
   OK_END ();
 
  error:
   if (att) g_object_unref (att);
   if (id) g_free (id);
 }
 
 
 /* document-level attachments */
 const command_arg_type_t cmd_getattachments_spec[] =
   {
     ARG_DOC,
     ARG_BOOL,        /* save attachments */
   };
 
 static void
 cmd_getattachments (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args->value.doc;
   gboolean do_save = args[1].value.flag;
   GList *item;
   GList *attmnts = poppler_document_get_attachments (doc->pdf);
   int i;
 
   OK_BEGIN ();
   for (item = attmnts, i = 0; item; item = item->next, ++i)
     {
       PopplerAttachment *att = (PopplerAttachment*) item->data;
       gchar *id = g_strdup_printf ("attachment-document-%d", i);
 
       attachment_print (att, id, do_save);
       g_object_unref (att);
       g_free (id);
     }
   g_list_free (attmnts);
 
   OK_END ();
 }
 
 #ifdef HAVE_POPPLER_ANNOT_WRITE
 
 const command_arg_type_t cmd_addannot_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     ARG_STRING,                 /* type */
     ARG_EDGES_OR_POSITION,      /* edges or position (uses default size) */
     ARG_REST,                  /* markup regions */
   };
 
 static void
 cmd_addannot (const epdfinfo_t *ctx, const command_arg_t *args)
 {
 
   document_t *doc = args->value.doc;
   gint pn = args[1].value.natnum;
   const char *type_string = args[2].value.string;
   PopplerRectangle r = args[3].value.rectangle;
   int i;
   PopplerPage *page = NULL;
   double width, height;
   PopplerAnnot *pa;
   PopplerAnnotMapping *amap;
   annotation_t *a;
   gchar *key;
   GList *annotations;
   gdouble y2;
   char *error_msg = NULL;
 
   page = poppler_document_get_page (doc->pdf, pn - 1);
   perror_if_not (page, "Unable to get page %d", pn);
   poppler_page_get_size (page, &width, &height);
   r.x1 *= width; r.x2 *= width;
   r.y1 *= height; r.y2 *= height;
   if (r.y2 < 0)
     r.y2 = r.y1 + 24;
   if (r.x2 < 0)
     r.x2 = r.x1 + 24;
   y2 = r.y2;
   r.y2 = height - r.y1;
   r.y1 = height - y2;
 
   pa = annotation_new (ctx, doc, page, type_string, &r, &args[4], &error_msg);
   perror_if_not (pa, "Creating annotation failed: %s",
                  error_msg ? error_msg : "Reason unknown");
   amap = poppler_annot_mapping_new ();
   amap->area = r;
   amap->annot = pa;
   annotations = annoation_get_for_page (doc, pn);
 
   i = g_list_length (annotations);
   key = g_strdup_printf ("annot-%d-%d", pn, i);
   while (g_hash_table_lookup (doc->annotations.keys, key))
     {
       g_free (key);
       key = g_strdup_printf ("annot-%d-%d", pn, ++i);
     }
   a = g_malloc (sizeof (annotation_t));
   a->amap = amap;
   a->key = key;
   doc->annotations.pages[pn - 1] =
     g_list_prepend (annotations, a);
   g_hash_table_insert (doc->annotations.keys, key, a);
   poppler_page_add_annot (page, pa);
   OK_BEGIN ();
   annotation_print (a, page);
   OK_END ();
 
  error:
   if (page) g_object_unref (page);
   if (error_msg) g_free (error_msg);
 }
 
 
 const command_arg_type_t cmd_delannot_spec[] =
   {
     ARG_DOC,
     ARG_NONEMPTY_STRING         /* Annotation's key */
   };
 
 static void
 cmd_delannot (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args->value.doc;
   const gchar *key = args[1].value.string;
   PopplerPage *page = NULL;
   annotation_t *a = annotation_get_by_key (doc, key);
   gint pn;
 
   perror_if_not (a, "No such annotation: %s", key);
   pn = poppler_annot_get_page_index (a->amap->annot) + 1;
   if (pn >= 1)
     page = poppler_document_get_page (doc->pdf, pn - 1);
   perror_if_not (page, "Unable to get page %d", pn);
   poppler_page_remove_annot (page, a->amap->annot);
   doc->annotations.pages[pn - 1] =
     g_list_remove (doc->annotations.pages[pn - 1], a);
   g_hash_table_remove (doc->annotations.keys, a->key);
   poppler_annot_mapping_free(a->amap);
   OK ();
 
  error:
   if (a)
     {
       g_free (a->key);
       g_free (a);
     }
   if (page) g_object_unref (page);
 }
 
 const command_arg_type_t cmd_editannot_spec[] =
   {
     ARG_DOC,
     ARG_NONEMPTY_STRING,        /* annotation key */
     ARG_REST                    /* (KEY VALUE ...) */
   };
 
 static void
 cmd_editannot (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args->value.doc;
   const char *key = args[1].value.string;
   int nrest_args = args[2].value.rest.nargs;
   char * const *rest_args = args[2].value.rest.args;
   annotation_t *a = annotation_get_by_key (doc, key);
   PopplerAnnot *pa;
   PopplerPage *page = NULL;
   int i = 0;
   gint index;
   char *error_msg = NULL;
   command_arg_t carg;
   const char *unexpected_parse_error = "Internal error while parsing arg `%s'";
 
   perror_if_not (a, "No such annotation: %s", key);
   pa = a->amap->annot;
   perror_if_not (annotation_edit_validate (ctx, &args[2], pa, &error_msg),
                  "%s", error_msg);
   index = poppler_annot_get_page_index (pa);
   page = poppler_document_get_page (doc->pdf, index);
   perror_if_not (page, "Unable to get page %d for annotation", index);
 
   for (i = 0; i < nrest_args; ++i)
     {
       const char *key = rest_args[i++];
 
       if (! strcmp (key, "flags"))
         {
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_NATNUM, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_set_flags (pa, carg.value.natnum);
         }
       else if (! strcmp (key, "color"))
         {
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_COLOR, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_set_color (pa, &carg.value.color);
         }
       else if (! strcmp (key, "contents"))
         {
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_STRING, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_set_contents (pa, carg.value.string);
         }
       else if (! strcmp (key, "edges"))
         {
           PopplerRectangle *area = &a->amap->area;
           gdouble width, height;
           PopplerRectangle r;
 
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_EDGES_OR_POSITION, NULL),
                          unexpected_parse_error, rest_args[i]);
           r = carg.value.rectangle;
           poppler_page_get_size (page, &width, &height);
 
           /* Translate Gravity and maybe keep the width and height. */
           if (r.x2 < 0)
             area->x2 +=  (r.x1 * width) - area->x1;
           else
             area->x2 = r.x2 * width;
 
           if (r.y2 < 0)
             area->y1 -=  (r.y1 * height) - (height - area->y2);
           else
             area->y1 = height - (r.y2 * height);
 
           area->x1 = r.x1 * width;
           area->y2 = height - (r.y1 * height);
 
           poppler_annot_set_rectangle (pa, area);
         }
       else if (! strcmp (key, "label"))
         {
           PopplerAnnotMarkup *ma = POPPLER_ANNOT_MARKUP (pa);
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_STRING, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_markup_set_label (ma, carg.value.string);
         }
       else if (! strcmp (key, "opacity"))
         {
           PopplerAnnotMarkup *ma = POPPLER_ANNOT_MARKUP (pa);
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_EDGE, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_markup_set_opacity (ma, carg.value.edge);
         }
       else if (! strcmp (key, "popup"))
         {
           PopplerAnnotMarkup *ma = POPPLER_ANNOT_MARKUP (pa);
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_EDGES, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_markup_set_popup (ma, &carg.value.rectangle);
         }
       else if (! strcmp (key, "popup-is-open"))
         {
           PopplerAnnotMarkup *ma = POPPLER_ANNOT_MARKUP (pa);
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_BOOL, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_markup_set_popup_is_open (ma, carg.value.flag);
         }
       else if (! strcmp (key, "icon"))
         {
           PopplerAnnotText *ta = POPPLER_ANNOT_TEXT (pa);
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_STRING, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_text_set_icon (ta, carg.value.string);
         }
       else if (! strcmp (key, "is-open"))
         {
           PopplerAnnotText *ta = POPPLER_ANNOT_TEXT (pa);
           perror_if_not (command_arg_parse_arg  (ctx, rest_args[i], &carg,
                                                  ARG_BOOL, NULL),
                          unexpected_parse_error, rest_args[i]);
           poppler_annot_text_set_is_open (ta, carg.value.flag);
         }
       else
         {
           perror_if_not (0, "internal error: annotation property validation failed");
         }
     }
 
   OK_BEGIN ();
   annotation_print (a, page);
   OK_END ();
 
  error:
   if (error_msg) g_free (error_msg);
   if (page) g_object_unref (page);
 }
 
 const command_arg_type_t cmd_save_spec[] =
   {
     ARG_DOC,
   };
 
 static void
 cmd_save (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args->value.doc;
   char *filename = mktempfile ();
   GError *gerror = NULL;
   gchar *uri;
   gboolean success = FALSE;
 
   if (!filename)
     {
       printf_error_response ("Unable to create temporary file");
       return;
     }
 
   uri = g_filename_to_uri (filename, NULL, &gerror);
 
   if (uri)
     {
       success = poppler_document_save (doc->pdf, uri, &gerror);
       g_free (uri);
     }
   if (! success)
     {
       printf_error_response ("Error while saving %s:%s"
                     , filename, gerror ? gerror->message : "?");
       if (gerror)
         g_error_free (gerror);
       return;
     }
   OK_BEGIN ();
   print_response_string (filename, NEWLINE);
   OK_END ();
 }
 
 #endif  /* HAVE_POPPLER_ANNOT_WRITE */
 
 
 const command_arg_type_t cmd_synctex_forward_search_spec[] =
   {
     ARG_DOC,
     ARG_NONEMPTY_STRING,        /* source file */
     ARG_NATNUM,                 /* line number */
     ARG_NATNUM                  /* column number */
   };
 
 static void
 cmd_synctex_forward_search (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args[0].value.doc;
   const char *source = args[1].value.string;
   int line = args[2].value.natnum;
   int column = args[3].value.natnum;
   synctex_scanner_p scanner = NULL;
   synctex_node_p node;
   float x1, y1, x2, y2;
   PopplerPage *page = NULL;
   double width, height;
   int pn;
 
   scanner = synctex_scanner_new_with_output_file (doc->filename, NULL, 1);
   perror_if_not (scanner, "Unable to create synctex scanner,\
  did you run latex with `--synctex=1' ?");
 
   perror_if_not (synctex_display_query (scanner, source, line, column, 0)
                 && (node = synctex_scanner_next_result (scanner)),
                 "Destination not found");
 
   pn = synctex_node_page (node);
   page = poppler_document_get_page(doc->pdf, pn - 1);
   perror_if_not (page, "Page not found");
   x1 =  synctex_node_box_visible_h (node);
   y1 =  synctex_node_box_visible_v (node)
         - synctex_node_box_visible_height (node);
   x2 = synctex_node_box_visible_width (node) + x1;
   y2 = synctex_node_box_visible_depth (node)
        + synctex_node_box_visible_height (node) + y1;
   poppler_page_get_size (page, &width, &height);
   x1 /= width;
   y1 /= height;
   x2 /= width;
   y2 /= height;
 
   OK_BEGIN ();
   printf("%d:%f:%f:%f:%f\n", pn, x1, y1, x2, y2);
   OK_END ();
 
  error:
   if (page) g_object_unref (page);
   if (scanner) synctex_scanner_free (scanner);
 }
 
 
 const command_arg_type_t cmd_synctex_backward_search_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     ARG_EDGE,                   /* x */
     ARG_EDGE                    /* y */
   };
 
 static void
 cmd_synctex_backward_search (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args[0].value.doc;
   int pn = args[1].value.natnum;
   double x = args[2].value.edge;
   double y = args[3].value.edge;
   synctex_scanner_p scanner = NULL;
   const char *filename;
   PopplerPage *page = NULL;
   synctex_node_p node;
   double width, height;
   int line, column;
 
   scanner = synctex_scanner_new_with_output_file (doc->filename, NULL, 1);
   perror_if_not (scanner, "Unable to create synctex scanner,\
  did you run latex with `--synctex=1' ?");
 
   page = poppler_document_get_page(doc->pdf, pn - 1);
   perror_if_not (page, "Page not found");
   poppler_page_get_size (page, &width, &height);
   x = x * width;
   y = y * height;
 
   if (! synctex_edit_query (scanner, pn, x, y)
       || ! (node = synctex_scanner_next_result (scanner))
       || ! (filename =
             synctex_scanner_get_name (scanner, synctex_node_tag (node))))
     {
       printf_error_response ("Destination not found");
       goto error;
     }
 
   line = synctex_node_line (node);
   column = synctex_node_column (node);
 
   OK_BEGIN ();
   print_response_string (filename, COLON);
   printf("%d:%d\n", line, column);
   OK_END ();
 
  error:
   if (page) g_object_unref (page);
   if (scanner) synctex_scanner_free (scanner);
 }
 
 
 const command_arg_type_t cmd_renderpage_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     ARG_NATNUM,                 /* width */
     ARG_REST,                   /* commands */
   };
 
 static void
 cmd_renderpage (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args[0].value.doc;
   int pn = args[1].value.natnum;
   int width = args[2].value.natnum;
   int nrest_args = args[3].value.rest.nargs;
   char * const *rest_args = args[3].value.rest.args;
   PopplerPage *page = poppler_document_get_page(doc->pdf, pn - 1);
   cairo_surface_t *surface = NULL;
   cairo_t *cr = NULL;
   command_arg_t rest_arg;
   gchar *error_msg = NULL;
   double pt_width, pt_height;
   PopplerColor fg = { 0, 0, 0 };
   PopplerColor bg = { 65535, 0, 0 };
   double alpha = 1.0;
   double line_width = 1.5;
   PopplerRectangle cb = {0.0, 0.0, 1.0, 1.0};
   int i = 0;
 
   perror_if_not (page, "No such page %d", pn);
   poppler_page_get_size (page, &pt_width, &pt_height);
   surface = image_render_page (doc->pdf, page, width, 1,
                                &doc->options.render);
   perror_if_not (surface, "Failed to render page %d", pn);
 
   if (! nrest_args)
     goto theend;
 
   cr = cairo_create (surface);
   cairo_scale (cr, width / pt_width, width / pt_width);
 
   while (i < nrest_args)
     {
       const char* keyword;
 
       perror_if_not (command_arg_parse_arg (ctx, rest_args[i], &rest_arg,
                                             ARG_STRING, &error_msg),
                      "%s", error_msg);
       keyword = rest_arg.value.string;
       ++i;
 
       perror_if_not (i < nrest_args, "Keyword is `%s' missing an argument",
                      keyword);
 
       if (! strcmp (keyword, ":foreground")
           || ! strcmp (keyword, ":background"))
         {
           perror_if_not (command_arg_parse_arg (ctx, rest_args[i], &rest_arg,
                                                 ARG_COLOR, &error_msg),
                          "%s", error_msg);
           ++i;
           if (! strcmp (keyword, ":foreground"))
             fg = rest_arg.value.color;
           else
             bg = rest_arg.value.color;
 
         }
       else if (! strcmp (keyword, ":alpha"))
         {
           perror_if_not (command_arg_parse_arg (ctx, rest_args[i], &rest_arg,
                                                 ARG_EDGE, &error_msg),
                          "%s", error_msg);
           ++i;
           alpha = rest_arg.value.edge;
         }
       else if (! strcmp (keyword, ":crop-to")
                || ! strcmp (keyword, ":highlight-region")
                || ! strcmp (keyword, ":highlight-text")
                || ! strcmp (keyword, ":highlight-line"))
         {
           PopplerRectangle *r;
           perror_if_not (command_arg_parse_arg (ctx, rest_args[i], &rest_arg,
                                                 ARG_EDGES, &error_msg),
                          "%s", error_msg);
 
           ++i;
           r = &rest_arg.value.rectangle;
 
           if (! strcmp (keyword, ":crop-to"))
             {
               gdouble w = (cb.x2 - cb.x1);
               gdouble h = (cb.y2 - cb.y1);
               gdouble x1 = cb.x1;
               gdouble y1 = cb.y1;
 
               cb.x1 = r->x1 * w + x1;
               cb.x2 = r->x2 * w + x1;
               cb.y1 = r->y1 * h + y1;
               cb.y2 = r->y2 * h + y1;
 
             }
           else
             {
               r->x1 = pt_width * r->x1 * (cb.x2 - cb.x1) + pt_width * cb.x1;
               r->x2 = pt_width * r->x2 * (cb.x2 - cb.x1) + pt_width * cb.x1;
               r->y1 = pt_height * r->y1 * (cb.y2 - cb.y1) + pt_height * cb.y1;
               r->y2 = pt_height * r->y2 * (cb.y2 - cb.y1) + pt_height * cb.y1;
 
               if (! strcmp (keyword, ":highlight-region"))
                 {
                   const double deg = M_PI / 180.0;
                   double rad;
 
                   r->x1 += line_width / 2;
                   r->x2 -= line_width / 2;
                   r->y1 += line_width / 2;
                   r->y2 -= line_width / 2;
 
                   rad = MIN (5, MIN (r->x2 - r->x1, r->y2 - r->y1) / 2.0);
 
                   cairo_move_to (cr, r->x1 , r->y1 + rad);
                   cairo_arc (cr, r->x1 + rad, r->y1 + rad, rad, 180 * deg, 270 * deg);
                   cairo_arc (cr, r->x2 - rad, r->y1 + rad, rad, 270 * deg, 360 * deg);
                   cairo_arc (cr, r->x2 - rad, r->y2 - rad, rad, 0 * deg, 90 * deg);
                   cairo_arc (cr, r->x1 + rad, r->y2 - rad, rad, 90 * deg, 180 * deg);
                   cairo_close_path (cr);
 
                   cairo_set_source_rgba (cr,
                                          bg.red / 65535.0,
                                          bg.green / 65535.0,
                                          bg.blue / 65535.0, alpha);
                   cairo_fill_preserve (cr);
                   cairo_set_source_rgba (cr,
                                          fg.red / 65535.0,
                                          fg.green / 65535.0,
                                          fg.blue / 65535.0, 1.0);
                   cairo_set_line_width (cr, line_width);
                   cairo_stroke (cr);
                 }
               else
                 {
                   gboolean is_single_line = ! strcmp (keyword, ":highlight-line");
 
                   if (is_single_line)
                     {
                       gdouble m = r->y1 + (r->y2 - r->y1) / 2;
 
                       /* Make the rectangle flat, otherwise poppler frequently
                          renders neighboring lines.*/
                       r->y1 = m;
                       r->y2 = m;
                     }
 
                   poppler_page_render_selection (page, cr, r, NULL,
                                                  POPPLER_SELECTION_GLYPH, &fg, &bg);
                 }
             }
         }
       else
         perror_if_not (0, "Unknown render command: %s", keyword);
     }
   if (cb.x1 != 0 || cb.y1 != 0 || cb.x2 != 1 || cb.y2 != 1)
     {
       int height = cairo_image_surface_get_height (surface);
       cairo_rectangle_int_t r = {(int) (width * cb.x1 + 0.5),
                                  (int) (height * cb.y1 + 0.5),
                                  (int) (width * (cb.x2 - cb.x1) + 0.5),
                                  (int) (height * (cb.y2 - cb.y1) + 0.5)};
       cairo_surface_t *nsurface =
         cairo_image_surface_create (CAIRO_FORMAT_ARGB32, r.width, r.height);
       perror_if_not (cairo_surface_status (surface) == CAIRO_STATUS_SUCCESS,
                      "%s", "Failed to create cairo surface");
       cairo_destroy (cr);
       cr = cairo_create (nsurface);
       perror_if_not (cairo_status (cr) == CAIRO_STATUS_SUCCESS,
                      "%s", "Failed to create cairo context");
       cairo_set_source_surface (cr, surface, -r.x, -r.y);
       cairo_paint (cr);
       cairo_surface_destroy (surface);
       surface = nsurface;
     }
 
  theend:
   image_write_print_response (surface, PNG);
 
  error:
   if (error_msg) g_free (error_msg);
   if (cr) cairo_destroy (cr);
   if (surface) cairo_surface_destroy (surface);
   if (page) g_object_unref (page);
 }
 
 const command_arg_type_t cmd_boundingbox_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     /* region */
   };
 
 static void
 cmd_boundingbox (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args[0].value.doc;
   int pn = args[1].value.natnum;
   PopplerPage *page = poppler_document_get_page(doc->pdf, pn - 1);
   cairo_surface_t *surface = NULL;
   int width, height;
   double pt_width, pt_height;
   unsigned char *data, *data_p;
   PopplerRectangle bbox;
   int i, j;
 
   perror_if_not (page, "No such page %d", pn);
   poppler_page_get_size (page, &pt_width, &pt_height);
   surface = image_render_page (doc->pdf, page, (int) pt_width, 1,
                                &doc->options.render);
 
   perror_if_not (cairo_surface_status(surface) == CAIRO_STATUS_SUCCESS,
                 "Failed to render page");
 
   width = cairo_image_surface_get_width (surface);
   height = cairo_image_surface_get_height (surface);
   data = cairo_image_surface_get_data (surface);
 
   /* Determine the bbox by comparing each pixel in the 4 corner
      stripes with the origin. */
   for (i = 0; i < width; ++i)
     {
       data_p = data + 4 * i;
       for (j = 0; j < height; ++j, data_p += 4 * width)
         {
           if (! ARGB_EQUAL (data, data_p))
             break;
         }
       if (j < height)
         break;
     }
   bbox.x1 = i;
 
   for (i = width - 1; i > -1; --i)
     {
       data_p = data + 4 * i;
       for (j = 0; j < height; ++j, data_p += 4 * width)
         {
           if (! ARGB_EQUAL (data, data_p))
             break;
         }
       if (j < height)
         break;
     }
   bbox.x2 = i + 1;
 
   for (i = 0; i < height; ++i)
     {
       data_p = data + 4 * i * width;
       for (j = 0; j < width; ++j, data_p += 4)
         {
           if (! ARGB_EQUAL (data, data_p))
             break;
         }
       if (j < width)
         break;
     }
   bbox.y1 = i;
 
   for (i = height - 1; i > -1; --i)
     {
       data_p = data + 4 * i * width;
       for (j = 0; j < width; ++j, data_p += 4)
         {
           if (! ARGB_EQUAL (data, data_p))
             break;
         }
       if (j < width)
         break;
     }
   bbox.y2 = i + 1;
 
   OK_BEGIN ();
   if (bbox.x1 >= bbox.x2 || bbox.y1 >= bbox.y2)
     {
       /* empty page */
       puts ("0:0:1:1");
     }
   else
     {
       printf ("%f:%f:%f:%f\n",
               bbox.x1 / width,
               bbox.y1 / height,
               bbox.x2 / width,
               bbox.y2 / height);
     }
   OK_END ();
 
  error:
   if (surface) cairo_surface_destroy (surface);
   if (page) g_object_unref (page);
 }
 
 const command_arg_type_t cmd_charlayout_spec[] =
   {
     ARG_DOC,
     ARG_NATNUM,                 /* page number */
     ARG_EDGES_OR_POSITION,      /* region or position */
   };
 
 static void
 cmd_charlayout(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int pn = args[1].value.natnum;
   PopplerRectangle region = args[2].value.rectangle;
   double width, height;
   PopplerPage *page = poppler_document_get_page(doc, pn - 1);
   char *text = NULL;
   char *text_p;
   PopplerRectangle *rectangles = NULL;
   guint nrectangles;
   int i;
   gboolean have_position = region.y2 < 0;
 
   perror_if_not (page, "No such page %d", pn);
 
   text = poppler_page_get_text (page);
   text_p = text;
   poppler_page_get_text_layout (page, &rectangles, &nrectangles);
   poppler_page_get_size (page, &width, &height);
   region.x1 *= width;
   region.x2 *= width;
   region.y1 *= height;
   region.y2 *= height;
 
   OK_BEGIN ();
   for (i = 0; i < nrectangles && *text_p; ++i)
     {
       PopplerRectangle *r = &rectangles[i];
       char *nextc = g_utf8_offset_to_pointer (text_p, 1);
 
       if ((have_position
            && region.x1 >= r->x1
            && region.x1 <= r->x2
            && region.y1 >= r->y1
            && region.y1 <= r->y2)
           || (! have_position
               && r->x1 >= region.x1
               && r->y1 >= region.y1
               && r->x2 <= region.x2
               && r->y2 <= region.y2))
         {
           char endc = *nextc;
 
           printf ("%f %f %f %f:",
                   r->x1 / width, r->y1 / height,
                   r->x2 / width, r->y2 / height);
           *nextc = '\0';
           print_response_string (text_p, NEWLINE);
           *nextc = endc;
         }
       text_p = nextc;
     }
   OK_END ();
 
   g_free (rectangles);
   g_object_unref (page);
   g_free (text);
 
  error:
   return;
 }
 
 const document_option_t document_options [] =
   {
     DEC_DOPT (":render/usecolors", ARG_BOOL, render.usecolors),
     DEC_DOPT (":render/printed", ARG_BOOL, render.printed),
     DEC_DOPT (":render/foreground", ARG_COLOR, render.fg),
     DEC_DOPT (":render/background", ARG_COLOR, render.bg),
   };
 
 const command_arg_type_t cmd_getoptions_spec[] =
   {
     ARG_DOC,
   };
 
 static void
 cmd_getoptions(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   document_t *doc = args[0].value.doc;
   int i;
   OK_BEGIN ();
   for (i = 0; i < G_N_ELEMENTS (document_options); ++i)
     {
       command_arg_t arg;
 
       arg.type = document_options[i].type;
       memcpy (&arg.value,
               ((char*) &doc->options) + document_options[i].offset,
               command_arg_type_size (arg.type));
       print_response_string (document_options[i].name, COLON);
       command_arg_print (&arg);
       puts("");
     }
   OK_END ();
 }
 
 const command_arg_type_t cmd_setoptions_spec[] =
   {
     ARG_DOC,
     ARG_REST                    /* key value pairs */
   };
 
 static void
 cmd_setoptions(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   int i = 0;
   document_t *doc = args[0].value.doc;
   int nrest = args[1].value.rest.nargs;
   char * const *rest = args[1].value.rest.args;
   gchar *error_msg = NULL;
   document_options_t opts = doc->options;
   const size_t nopts = G_N_ELEMENTS (document_options);
 
   perror_if_not (nrest % 2 == 0, "Even number of key/value pairs expected");
 
   while (i < nrest)
     {
       int j;
       command_arg_t key, value;
 
       perror_if_not (command_arg_parse_arg
                      (ctx, rest[i], &key, ARG_NONEMPTY_STRING, &error_msg),
                      "%s", error_msg);
 
       ++i;
       for (j = 0; j < nopts; ++j)
         {
           const document_option_t *dopt = &document_options[j];
           if (! strcmp (key.value.string, dopt->name))
             {
               perror_if_not (command_arg_parse_arg
                              (ctx, rest[i], &value, dopt->type, &error_msg),
                              "%s", error_msg);
               memcpy (((char*) &opts) + dopt->offset,
                       &value.value, command_arg_type_size (value.type));
               break;
             }
         }
       perror_if_not (j < nopts, "Unknown option: %s", key.value.string);
       ++i;
     }
   doc->options = opts;
   cmd_getoptions (ctx, args);
 
  error:
   if (error_msg) g_free (error_msg);
 }
 
 const command_arg_type_t cmd_pagelabels_spec[] =
   {
     ARG_DOC,
   };
 
 static void
 cmd_pagelabels(const epdfinfo_t *ctx, const command_arg_t *args)
 {
   PopplerDocument *doc = args[0].value.doc->pdf;
   int i;
 
   OK_BEGIN ();
   for (i = 0; i < poppler_document_get_n_pages (doc); ++i)
     {
       PopplerPage *page = poppler_document_get_page(doc, i);
       gchar *label = poppler_page_get_label (page);
 
       print_response_string (label ? label : "", NEWLINE);
       g_object_unref (page);
       g_free (label);
     }
   OK_END ();
 }
 
 const command_arg_type_t cmd_ping_spec[] =
   {
     ARG_STRING                  /* any message */
   };
 
 static void
 cmd_ping (const epdfinfo_t *ctx, const command_arg_t *args)
 {
   const gchar *msg = args[0].value.string;
   OK_BEGIN ();
   print_response_string (msg, NEWLINE);
   OK_END ();
 }
 
 
 /* ================================================================== *
  * Main
  * ================================================================== */
 
 static const command_t commands [] =
   {
     /* Basic */
     DEC_CMD (ping),
     DEC_CMD (features),
     DEC_CMD (open),
     DEC_CMD (close),
     DEC_CMD (quit),
     DEC_CMD (getoptions),
     DEC_CMD (setoptions),
 
     /* Searching */
     DEC_CMD2 (search_string, "search-string"),
     DEC_CMD2 (search_regexp, "search-regexp"),
     DEC_CMD2 (regexp_flags, "regexp-flags"),
 
     /* General Information */
     DEC_CMD (metadata),
     DEC_CMD (outline),
     DEC_CMD2 (number_of_pages, "number-of-pages"),
     DEC_CMD (pagelinks),
     DEC_CMD (gettext),
     DEC_CMD (getselection),
     DEC_CMD (pagesize),
     DEC_CMD (boundingbox),
     DEC_CMD (charlayout),
 
     /* General Information */
     DEC_CMD (metadata),
     DEC_CMD (outline),
     DEC_CMD2 (number_of_pages, "number-of-pages"),
     DEC_CMD (pagelinks),
     DEC_CMD (gettext),
     DEC_CMD (getselection),
     DEC_CMD (pagesize),
     DEC_CMD (boundingbox),
     DEC_CMD (charlayout),
     DEC_CMD (pagelabels),
 
     /* Annotations */
     DEC_CMD (getannots),
     DEC_CMD (getannot),
 #ifdef HAVE_POPPLER_ANNOT_WRITE
     DEC_CMD (addannot),
     DEC_CMD (delannot),
     DEC_CMD (editannot),
     DEC_CMD (save),
 #endif
 
     /* Attachments */
     DEC_CMD2 (getattachment_from_annot, "getattachment-from-annot"),
     DEC_CMD (getattachments),
 
     /* Synctex */
     DEC_CMD2 (synctex_forward_search, "synctex-forward-search"),
     DEC_CMD2 (synctex_backward_search, "synctex-backward-search"),
 
     /* Rendering */
     DEC_CMD (renderpage),
   };
 
 int main(int argc, char **argv)
 {
   epdfinfo_t ctx = {0};
   char *line = NULL;
   ssize_t read;
   size_t line_size;
   const char *error_log = "/dev/null";
 
 #ifdef __MINGW32__
   error_log = "NUL";
   _setmode(_fileno(stdin), _O_BINARY);
   _setmode(_fileno(stdout), _O_BINARY);
 #endif
 
   if (argc > 2)
     {
       fprintf(stderr, "usage: epdfinfo [ERROR-LOGFILE]\n");
       exit (EXIT_FAILURE);
     }
   if (argc == 2)
     error_log = argv[1];
 
   if (! freopen (error_log, "a", stderr))
     err (2, "Unable to redirect stderr");
 
 #if ! GLIB_CHECK_VERSION(2,36,0)
   g_type_init ();
 #endif
 
   ctx.documents = g_hash_table_new (g_str_hash, g_str_equal);
 
   setvbuf (stdout, NULL, _IOFBF, BUFSIZ);
 
   while ((read = getline (&line, &line_size, stdin)) != -1)
     {
       int nargs = 0;
       command_arg_t *cmd_args = NULL;
       char **args = NULL;
       gchar *error_msg = NULL;
       int i;
 
       if (read <= 1 || line[read - 1] != '\n')
         {
           fprintf (stderr, "Skipped parts of a line: `%s'\n", line);
           goto next_line;
         }
 
       line[read - 1] = '\0';
       args = command_arg_split (line, &nargs);
       if (nargs == 0)
         continue;
 
       for (i = 0; i < G_N_ELEMENTS (commands);  i++)
         {
           if (! strcmp (commands[i].name, args[0]))
             {
               if (commands[i].nargs == 0
                   || (cmd_args = command_arg_parse (&ctx, args + 1, nargs - 1,
                                                     commands + i, &error_msg)))
                 {
                   commands[i].execute (&ctx, cmd_args);
                   if (commands[i].nargs > 0)
                     free_command_args (cmd_args, commands[i].nargs);
                 }
               else
                 {
                   printf_error_response ("%s", error_msg ? error_msg :
                                          "Unknown error (this is a bug)");
                 }
               if (error_msg)
                 g_free (error_msg);
               break;
             }
         }
       if (G_N_ELEMENTS (commands) == i)
         {
           printf_error_response ("Unknown command: %s", args[0]);
         }
       for (i = 0; i < nargs; ++i)
         g_free (args[i]);
       g_free (args);
     next_line:
       free (line);
       line = NULL;
     }
 
   if (ferror (stdin))
     err (2, NULL);
   exit (EXIT_SUCCESS);
 }