[evince] libview: Add a way to get the text logical attributes from the page cache

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 6870279699b2d250fdaa7b53fa6d4ee48047f597
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Tue Jun 11 14:22:41 2013 +0200

    libview: Add a way to get the text logical attributes from the page cache
    
    It returns an array of PangoLogAttr with the logical attributes of the
    text for the given page.

 libview/ev-jobs.c       |    7 ++++++
 libview/ev-jobs.h       |   21 +++++++++++--------
 libview/ev-page-cache.c |   50 +++++++++++++++++++++++++++++++++++++++++++++++
 libview/ev-page-cache.h |    5 +++-
 4 files changed, 73 insertions(+), 10 deletions(-)
---
diff --git a/libview/ev-jobs.c b/libview/ev-jobs.c
index 507411e..2bf7a3c 100644
--- a/libview/ev-jobs.c
+++ b/libview/ev-jobs.c
@@ -747,6 +747,13 @@ ev_job_page_data_run (EvJob *job)
                                                  ev_page,
                                                  &(job_pd->text_layout),
                                                  &(job_pd->text_layout_length));
+        if ((job_pd->flags & EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS) && job_pd->text) {
+                job_pd->text_log_attrs_length = g_utf8_strlen (job_pd->text, -1);
+                job_pd->text_log_attrs = g_new0 (PangoLogAttr, job_pd->text_log_attrs_length + 1);
+
+                /* FIXME: We need API to get the language of the document */
+                pango_get_log_attrs (job_pd->text, -1, -1, NULL, job_pd->text_log_attrs, 
job_pd->text_log_attrs_length + 1);
+        }
        if ((job_pd->flags & EV_PAGE_DATA_INCLUDE_LINKS) && EV_IS_DOCUMENT_LINKS (job->document))
                job_pd->link_mapping =
                        ev_document_links_get_links (EV_DOCUMENT_LINKS (job->document), ev_page);
diff --git a/libview/ev-jobs.h b/libview/ev-jobs.h
index cc9b7ad..a436100 100644
--- a/libview/ev-jobs.h
+++ b/libview/ev-jobs.h
@@ -261,15 +261,16 @@ struct _EvJobRenderClass
 };
 
 typedef enum {
-       EV_PAGE_DATA_INCLUDE_NONE         = 0,
-       EV_PAGE_DATA_INCLUDE_LINKS        = 1 << 0,
-       EV_PAGE_DATA_INCLUDE_TEXT         = 1 << 1,
-       EV_PAGE_DATA_INCLUDE_TEXT_MAPPING = 1 << 2,
-       EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT  = 1 << 3,
-       EV_PAGE_DATA_INCLUDE_IMAGES       = 1 << 4,
-       EV_PAGE_DATA_INCLUDE_FORMS        = 1 << 5,
-       EV_PAGE_DATA_INCLUDE_ANNOTS       = 1 << 6,
-       EV_PAGE_DATA_INCLUDE_ALL          = (1 << 7) - 1
+        EV_PAGE_DATA_INCLUDE_NONE           = 0,
+        EV_PAGE_DATA_INCLUDE_LINKS          = 1 << 0,
+        EV_PAGE_DATA_INCLUDE_TEXT           = 1 << 1,
+        EV_PAGE_DATA_INCLUDE_TEXT_MAPPING   = 1 << 2,
+        EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT    = 1 << 3,
+        EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS = 1 << 4,
+        EV_PAGE_DATA_INCLUDE_IMAGES         = 1 << 5,
+        EV_PAGE_DATA_INCLUDE_FORMS          = 1 << 6,
+        EV_PAGE_DATA_INCLUDE_ANNOTS         = 1 << 7,
+        EV_PAGE_DATA_INCLUDE_ALL            = (1 << 8) - 1
 } EvJobPageDataFlags;
 
 struct _EvJobPageData
@@ -287,6 +288,8 @@ struct _EvJobPageData
        gchar *text;
        EvRectangle *text_layout;
        guint text_layout_length;
+        PangoLogAttr *text_log_attrs;
+        gulong text_log_attrs_length;
 };
 
 struct _EvJobPageDataClass
diff --git a/libview/ev-page-cache.c b/libview/ev-page-cache.c
index c3c5704..598dcda 100644
--- a/libview/ev-page-cache.c
+++ b/libview/ev-page-cache.c
@@ -45,6 +45,8 @@ typedef struct _EvPageCacheData {
        EvRectangle       *text_layout;
        guint              text_layout_length;
        gchar             *text;
+        PangoLogAttr      *text_log_attrs;
+        gulong             text_log_attrs_length;
 } EvPageCacheData;
 
 struct _EvPageCache {
@@ -123,6 +125,12 @@ ev_page_cache_data_free (EvPageCacheData *data)
                g_free (data->text);
                data->text = NULL;
        }
+
+        if (data->text_log_attrs) {
+                g_free (data->text_log_attrs);
+                data->text_log_attrs = NULL;
+                data->text_log_attrs_length = 0;
+        }
 }
 
 static void
@@ -226,6 +234,12 @@ ev_page_cache_get_flags_for_data (EvPageCache     *cache,
                        flags | EV_PAGE_DATA_INCLUDE_TEXT_LAYOUT;
        }
 
+        if (cache->flags & EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS) {
+                flags = (data->text_log_attrs) ?
+                        flags & ~EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS :
+                        flags | EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS;
+        }
+
        return flags;
 }
 
@@ -270,6 +284,10 @@ job_page_data_finished_cb (EvJob       *job,
        }
        if (job_data->flags & EV_PAGE_DATA_INCLUDE_TEXT)
                data->text = job_data->text;
+        if (job_data->flags & EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS) {
+                data->text_log_attrs = job_data->text_log_attrs;
+                data->text_log_attrs_length = job_data->text_log_attrs_length;
+        }
        data->done = TRUE;
        data->dirty = FALSE;
 
@@ -519,3 +537,35 @@ ev_page_cache_get_text_layout (EvPageCache  *cache,
 
        return FALSE;
 }
+
+gboolean
+ev_page_cache_get_text_log_attrs (EvPageCache   *cache,
+                                  gint           page,
+                                  PangoLogAttr **log_attrs,
+                                  gulong        *n_attrs)
+{
+        EvPageCacheData *data;
+
+        g_return_val_if_fail (EV_IS_PAGE_CACHE (cache), FALSE);
+        g_return_val_if_fail (page >= 0 && page < cache->n_pages, FALSE);
+
+        if (!(cache->flags & EV_PAGE_DATA_INCLUDE_TEXT_LOG_ATTRS))
+                return FALSE;
+
+        data = &cache->page_list[page];
+        if (data->done) {
+                *log_attrs = data->text_log_attrs;
+                *n_attrs = data->text_log_attrs_length;
+
+                return TRUE;
+        }
+
+        if (data->job) {
+                *log_attrs = EV_JOB_PAGE_DATA (data->job)->text_log_attrs;
+                *n_attrs = EV_JOB_PAGE_DATA (data->job)->text_log_attrs_length;
+
+                return TRUE;
+        }
+
+        return FALSE;
+}
diff --git a/libview/ev-page-cache.h b/libview/ev-page-cache.h
index 1c2e5cd..5166e63 100644
--- a/libview/ev-page-cache.h
+++ b/libview/ev-page-cache.h
@@ -65,7 +65,10 @@ gboolean           ev_page_cache_get_text_layout        (EvPageCache       *cach
                                                         gint               page,
                                                         EvRectangle      **areas,
                                                         guint             *n_areas);
-
+gboolean           ev_page_cache_get_text_log_attrs     (EvPageCache       *cache,
+                                                         gint               page,
+                                                         PangoLogAttr     **log_attrs,
+                                                         gulong            *n_attrs);
 G_END_DECLS
 
 #endif /* EV_PAGE_CACHE_H */