X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=libdocument%2Fev-document-factory.c;h=c2d9b61cb55793e91a4d4b73d025ffa45e26f319;hb=610438716230315290df5f29f7cf53bad4b1f28b;hp=328ff74326083b7d2e6e6448b2b9fb1a846edb8e;hpb=86ad3e544e48530873357a1c112669b734ab988a;p=evince.git diff --git a/libdocument/ev-document-factory.c b/libdocument/ev-document-factory.c index 328ff743..c2d9b61c 100644 --- a/libdocument/ev-document-factory.c +++ b/libdocument/ev-document-factory.c @@ -23,10 +23,11 @@ #endif #include + #include #include -#include -#include +#include +#include #include "ev-backends-manager.h" #include "ev-document-factory.h" @@ -103,75 +104,46 @@ get_compression_from_mime_type (const gchar *mime_type) return EV_COMPRESSION_NONE; } -static gchar * -get_mime_type_from_uri (const gchar *uri, GError **error) -{ - GFile *file; - GFileInfo *file_info; - gchar *mime_type; - - file = g_file_new_for_uri (uri); - file_info = g_file_query_info (file, - G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE, - 0, NULL, error); - g_object_unref (file); - - if (file_info == NULL) - return NULL; - - mime_type = g_strdup (g_file_info_get_content_type (file_info)); - g_object_unref (file_info); - - return mime_type; -} - -static gchar * -get_mime_type_from_data (const gchar *uri, GError **error) -{ - GFile *file; - GFileInputStream *input_stream; - gssize size_read; - guchar buffer[1024]; - - file = g_file_new_for_uri (uri); - - input_stream = g_file_read (file, NULL, error); - if (!input_stream) { - g_object_unref (file); - return NULL; - } - - size_read = g_input_stream_read (G_INPUT_STREAM (input_stream), - buffer, 1024, NULL, NULL); - g_input_stream_close (G_INPUT_STREAM (input_stream), NULL, NULL); - - g_object_unref (file); - - if (size_read == -1) - return NULL; - - return g_content_type_guess (NULL, /* no filename */ - buffer, 1024, - NULL); -} +/* + * get_document_from_uri: + * @uri: the document URI + * @fast: whether to use fast MIME type detection + * @compression: a location to store the document's compression type + * @error: a #GError location to store an error, or %NULL + * + * Creates a #EvDocument instance for the document at @uri, using either + * fast or slow MIME type detection. If a document could be created, + * @compression is filled in with the document's compression type. + * On error, %NULL is returned and @error filled in. + * + * Returns: a new #EvDocument instance, or %NULL on error with @error filled in + */ static EvDocument * get_document_from_uri (const char *uri, - gboolean slow, + gboolean fast, EvCompressionType *compression, GError **error) { EvDocument *document = NULL; gchar *mime_type = NULL; + GError *err = NULL; *compression = EV_COMPRESSION_NONE; - mime_type = slow ? - get_mime_type_from_data (uri, error) : - get_mime_type_from_uri (uri, error); + mime_type = ev_file_get_mime_type (uri, fast, &err); if (mime_type == NULL) { g_free (mime_type); + + if (err == NULL) { + g_set_error_literal (error, + EV_DOCUMENT_ERROR, + EV_DOCUMENT_ERROR_INVALID, + _("Unknown MIME Type")); + } else { + g_propagate_error (error, err); + } return NULL; } @@ -184,12 +156,19 @@ get_document_from_uri (const char *uri, #endif /* ENABLE_PIXBUF */ if (document == NULL) { + gchar *content_type, *mime_desc = NULL; + + content_type = g_content_type_from_mime_type (mime_type); + if (content_type) + mime_desc = g_content_type_get_description (content_type); + g_set_error (error, EV_DOCUMENT_ERROR, - 0, + EV_DOCUMENT_ERROR_INVALID, _("File type %s (%s) is not supported"), - g_content_type_get_description (mime_type), - mime_type); + mime_desc ? mime_desc : "-", mime_type); + g_free (mime_desc); + g_free (content_type); g_free (mime_type); return NULL; @@ -212,6 +191,19 @@ free_uncompressed_uri (gchar *uri_unc) g_free (uri_unc); } +/** + * ev_document_factory_get_document: + * @uri: an URI + * @error: a #GError location to store an error, or %NULL + * + * Creates a #EvDocument for the document at @uri; or, if no backend handling + * the document's type is found, or an error occurred on opening the document, + * returns %NULL and fills in @error. + * If the document is encrypted, it is returned but also @error is set to + * %EV_DOCUMENT_ERROR_ENCRYPTED. + * + * Returns: a new #EvDocument, or %NULL. + */ EvDocument * ev_document_factory_get_document (const char *uri, GError **error) { @@ -219,84 +211,88 @@ ev_document_factory_get_document (const char *uri, GError **error) int result; EvCompressionType compression; gchar *uri_unc = NULL; + GError *err = NULL; + + g_return_val_if_fail (uri != NULL, NULL); + + document = get_document_from_uri (uri, TRUE, &compression, &err); + g_assert (document != NULL || err != NULL); - document = get_document_from_uri (uri, FALSE, &compression, error); - if (*error == NULL) { - uri_unc = ev_file_uncompress (uri, compression, error); + if (document != NULL) { + uri_unc = ev_file_uncompress (uri, compression, &err); if (uri_unc) { g_object_set_data_full (G_OBJECT (document), "uri-uncompressed", uri_unc, (GDestroyNotify) free_uncompressed_uri); - } - - if (*error != NULL) { + } else if (err != NULL) { /* Error uncompressing file */ - if (document) - g_object_unref (document); + g_object_unref (document); + g_propagate_error (error, err); return NULL; } - result = ev_document_load (document, uri_unc ? uri_unc : uri, error); + result = ev_document_load (document, uri_unc ? uri_unc : uri, &err); - if (result == FALSE || *error) { - if (*error && - (*error)->domain == EV_DOCUMENT_ERROR && - (*error)->code == EV_DOCUMENT_ERROR_ENCRYPTED) + if (result == FALSE || err) { + if (err && + g_error_matches (err, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_ENCRYPTED)) { + g_propagate_error (error, err); return document; + } + /* else fall through to slow mime code section below */ } else { return document; } + + g_object_unref (document); + document = NULL; } /* Try again with slow mime detection */ - if (document) - g_object_unref (document); - document = NULL; - - if (*error) - g_error_free (*error); - *error = NULL; - + g_clear_error (&err); uri_unc = NULL; - document = get_document_from_uri (uri, TRUE, &compression, error); - - if (*error != NULL) { + document = get_document_from_uri (uri, FALSE, &compression, &err); + if (document == NULL) { + g_assert (err != NULL); + g_propagate_error (error, err); return NULL; } - uri_unc = ev_file_uncompress (uri, compression, error); + uri_unc = ev_file_uncompress (uri, compression, &err); if (uri_unc) { g_object_set_data_full (G_OBJECT (document), "uri-uncompressed", uri_unc, (GDestroyNotify) free_uncompressed_uri); - } - - if (*error != NULL) { + } else if (err != NULL) { /* Error uncompressing file */ - if (document) - g_object_unref (document); + g_propagate_error (error, err); + + g_object_unref (document); return NULL; } - result = ev_document_load (document, uri_unc ? uri_unc : uri, error); - + result = ev_document_load (document, uri_unc ? uri_unc : uri, &err); if (result == FALSE) { - if (*error == NULL) { - g_set_error (error, - EV_DOCUMENT_ERROR, - 0, - _("Unknown MIME Type")); - } else if ((*error)->domain == EV_DOCUMENT_ERROR && - (*error)->code == EV_DOCUMENT_ERROR_ENCRYPTED) { + if (err == NULL) { + /* FIXME: this really should not happen; the backend should + * always return a meaningful error. + */ + g_set_error_literal (&err, + EV_DOCUMENT_ERROR, + EV_DOCUMENT_ERROR_INVALID, + _("Unknown MIME Type")); + } else if (g_error_matches (err, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_ENCRYPTED)) { + g_propagate_error (error, err); return document; } - if (document) - g_object_unref (document); + g_object_unref (document); document = NULL; + + g_propagate_error (error, err); } return document; @@ -332,7 +328,21 @@ file_filter_add_mime_types (EvTypeInfo *info, GtkFileFilter *filter) gtk_file_filter_add_mime_type (filter, mime_type); } -void +/** + * ev_document_factory_add_filters: + * @chooser: a #GtkFileChooser + * @document: a #EvDocument, or %NULL + * + * Adds some file filters to @chooser. + + * Always add a "All documents" format. + * + * If @document is not %NULL, adds a #GtkFileFilter for @document's MIME type. + * + * If @document is %NULL, adds a #GtkFileFilter for each document type that evince + * can handle. + */ +void ev_document_factory_add_filters (GtkWidget *chooser, EvDocument *document) { GList *all_types; @@ -340,6 +350,9 @@ ev_document_factory_add_filters (GtkWidget *chooser, EvDocument *document) GtkFileFilter *default_filter; GtkFileFilter *document_filter; + g_return_if_fail (GTK_IS_FILE_CHOOSER (chooser)); + g_return_if_fail (document == NULL || EV_IS_DOCUMENT (document)); + all_types = ev_backends_manager_get_all_types_info (); default_filter = document_filter = filter = gtk_file_filter_new ();