[evince] pdf: Add support for Screen annotations containing a rendition action

[Carlos Garcia Campos <carlosgc src gnome org>]

commit f65e22d43742eb64ab39a4b153ee30fb96d0e4b3
Author: Carlos Garcia Campos <cgarcia igalia com>
Date:   Wed May 27 14:54:15 2015 +0200

    pdf: Add support for Screen annotations containing a rendition action
    
    https://bugzilla.gnome.org/show_bug.cgi?id=573748

 backend/pdf/ev-poppler.cc |   88 ++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 87 insertions(+), 1 deletions(-)
---
diff --git a/backend/pdf/ev-poppler.cc b/backend/pdf/ev-poppler.cc
index a9765aa..e04ce01 100644
--- a/backend/pdf/ev-poppler.cc
+++ b/backend/pdf/ev-poppler.cc
@@ -56,6 +56,7 @@
 #include "ev-attachment.h"
 #include "ev-image.h"
 #include "ev-media.h"
+#include "ev-file-helpers.h"
 
 #include <libxml/tree.h>
 #include <libxml/parser.h>
@@ -2915,11 +2916,19 @@ ev_annot_from_poppler_annot (PopplerAnnot *poppler_annot,
                case POPPLER_ANNOT_MOVIE:
                        /* Ignore link, widgets and movie annots since they are already handled */
                        break;
+               case POPPLER_ANNOT_SCREEN: {
+                       PopplerAction *action;
+
+                       /* Ignore screen annots containing a rendition action */
+                       action = poppler_annot_screen_get_action (POPPLER_ANNOT_SCREEN (poppler_annot));
+                       if (action->type == POPPLER_ACTION_RENDITION)
+                               break;
+               }
+                       /* Fall through */
                case POPPLER_ANNOT_3D:
                case POPPLER_ANNOT_CARET:
                case POPPLER_ANNOT_FREE_TEXT:
                case POPPLER_ANNOT_LINE:
-               case POPPLER_ANNOT_SCREEN:
                case POPPLER_ANNOT_SOUND:
                case POPPLER_ANNOT_SQUARE:
                case POPPLER_ANNOT_SQUIGGLY:
@@ -3502,6 +3511,73 @@ ev_media_from_poppler_movie (EvDocument   *document,
        return media;
 }
 
+static void
+delete_temp_file (GFile *file)
+{
+       g_file_delete (file, NULL, NULL);
+       g_object_unref (file);
+}
+
+static gboolean
+media_save_to_file_callback (const gchar *buffer,
+                            gsize        count,
+                            gpointer     data,
+                            GError     **error)
+{
+       gint fd = GPOINTER_TO_INT (data);
+
+       return write (fd, buffer, count) == (gssize)count;
+}
+
+static EvMedia *
+ev_media_from_poppler_rendition (EvDocument   *document,
+                                EvPage       *page,
+                                PopplerMedia *poppler_media)
+{
+       EvMedia *media;
+       GFile   *file = NULL;
+       gchar   *uri;
+       gboolean is_temp_file = FALSE;
+
+       if (!poppler_media)
+               return NULL;
+
+       if (poppler_media_is_embedded (poppler_media)) {
+               gint   fd;
+               gchar *filename;
+
+               fd = ev_mkstemp ("evmedia.XXXXXX", &filename, NULL);
+               if (fd == -1)
+                       return NULL;
+
+               if (poppler_media_save_to_callback (poppler_media,
+                                                   media_save_to_file_callback,
+                                                   GINT_TO_POINTER (fd), NULL)) {
+                       file = g_file_new_for_path (filename);
+                       is_temp_file = TRUE;
+               }
+               close (fd);
+               g_free (filename);
+       } else {
+               file = get_media_file (poppler_media_get_filename (poppler_media), document);
+       }
+
+       if (!file)
+               return NULL;
+
+       uri = g_file_get_uri (file);
+       media = ev_media_new_for_uri (page, uri);
+       ev_media_set_show_controls (media, TRUE);
+       g_free (uri);
+
+       if (is_temp_file)
+               g_object_set_data_full (G_OBJECT (media), "poppler-media-temp-file", file, 
(GDestroyNotify)delete_temp_file);
+       else
+               g_object_unref (file);
+
+       return media;
+}
+
 static EvMappingList *
 pdf_document_media_get_media_mapping (EvDocumentMedia *document_media,
                                      EvPage          *page)
@@ -3537,6 +3613,16 @@ pdf_document_media_get_media_mapping (EvDocumentMedia *document_media,
                                                             poppler_annot_movie_get_movie (poppler_annot));
                }
                        break;
+               case POPPLER_ANNOT_SCREEN: {
+                       PopplerAction *action;
+
+                       action = poppler_annot_screen_get_action (POPPLER_ANNOT_SCREEN (mapping->annot));
+                       if (action->type == POPPLER_ACTION_RENDITION) {
+                               media = ev_media_from_poppler_rendition (EV_DOCUMENT (pdf_document), page,
+                                                                        action->rendition.media);
+                       }
+               }
+                       break;
                default:
                        break;
                }