[Tracker] PATCH: Extend oasis extractor to include drawing files

[Karl Relton <karllinuxtest relton ntlworld com>]

This patch upgrades the oasis extractor to extract text out of
graphic/drawing files (typical LibreOffice file extension .odg).

Karl

--- tracker-0.14.0.orig/src/tracker-extract/tracker-extract-oasis.c     2012-04-24 10:14:53.565748834 +0100
+++ tracker-0.14.0/src/tracker-extract/tracker-extract-oasis.c  2012-04-13 19:24:32.271191132 +0100
@@ -40,14 +40,16 @@ typedef enum {
        ODT_TAG_TYPE_GENERATOR,
        ODT_TAG_TYPE_WORD_TEXT,
        ODT_TAG_TYPE_SLIDE_TEXT,
-       ODT_TAG_TYPE_SPREADSHEET_TEXT
+       ODT_TAG_TYPE_SPREADSHEET_TEXT,
+       ODT_TAG_TYPE_GRAPHICS_TEXT
 } ODTTagType;
 
 typedef enum {
        FILE_TYPE_INVALID,
        FILE_TYPE_ODP,
        FILE_TYPE_ODT,
-       FILE_TYPE_ODS
+       FILE_TYPE_ODS,
+       FILE_TYPE_ODG
 } ODTFileType;
 
 typedef struct {
@@ -213,6 +215,8 @@ tracker_extract_get_metadata (TrackerExt
                file_type = FILE_TYPE_ODP;
        } else if (g_ascii_strcasecmp (mime_used, "application/vnd.oasis.opendocument.spreadsheet") == 0) {
                file_type = FILE_TYPE_ODS;
+       } else if (g_ascii_strcasecmp (mime_used, "application/vnd.oasis.opendocument.graphics") == 0) {
+               file_type = FILE_TYPE_ODG;
        } else {
                g_message ("Mime type was not recognised:'%s'", mime_used);
                file_type = FILE_TYPE_INVALID;
@@ -412,6 +416,14 @@ xml_start_element_handler_content (GMark
                }
                break;
 
+       case FILE_TYPE_ODG:
+               if (g_ascii_strncasecmp (element_name, "text", 4) == 0) {
+                       data->current = ODT_TAG_TYPE_GRAPHICS_TEXT;
+               } else {
+                       data->current = -1;
+               }
+               break;
+
        case FILE_TYPE_INVALID:
                g_message ("Open Office Document type: %d invalid", data->file_type);
                break;
@@ -444,6 +456,7 @@ xml_text_handler_content (GMarkupParseCo
        case ODT_TAG_TYPE_WORD_TEXT:
        case ODT_TAG_TYPE_SLIDE_TEXT:
        case ODT_TAG_TYPE_SPREADSHEET_TEXT:
+       case ODT_TAG_TYPE_GRAPHICS_TEXT:
                if (data->bytes_pending == 0) {
                        g_set_error_literal (error,
                                             maximum_size_error_quark, 0,