[evince] [pdf] Implement EvDocumentText interface

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 18d2af9bce80392407fae997c8dfa029f5a54123
Author: Daniel Garcia <danigm yaco es>
Date:   Sat Jun 26 16:12:57 2010 +0200

    [pdf] Implement EvDocumentText interface

 backend/pdf/ev-poppler.cc  |   68 ++++++++++++++++++++++++++++++++++++++-----
 configure.ac               |    4 ++
 libdocument/ev-selection.c |   12 --------
 libdocument/ev-selection.h |    6 +---
 libview/ev-jobs.c          |    5 ++-
 5 files changed, 68 insertions(+), 27 deletions(-)
---
diff --git a/backend/pdf/ev-poppler.cc b/backend/pdf/ev-poppler.cc
index 8659d08..4b26290 100644
--- a/backend/pdf/ev-poppler.cc
+++ b/backend/pdf/ev-poppler.cc
@@ -51,6 +51,7 @@
 #include "ev-document-print.h"
 #include "ev-document-annotations.h"
 #include "ev-document-attachments.h"
+#include "ev-document-text.h"
 #include "ev-selection.h"
 #include "ev-transition-effect.h"
 #include "ev-attachment.h"
@@ -126,6 +127,7 @@ static void pdf_document_find_iface_init                 (EvDocumentFindInterfac
 static void pdf_document_file_exporter_iface_init        (EvFileExporterInterface        *iface);
 static void pdf_selection_iface_init                     (EvSelectionInterface           *iface);
 static void pdf_document_page_transition_iface_init      (EvDocumentTransitionInterface  *iface);
+static void pdf_document_text_iface_init                 (EvDocumentTextInterface        *iface);
 static void pdf_document_thumbnails_get_dimensions       (EvDocumentThumbnails           *document_thumbnails,
 							  EvRenderContext                *rc,
 							  gint                           *width,
@@ -172,6 +174,8 @@ EV_BACKEND_REGISTER_WITH_CODE (PdfDocument, pdf_document,
 								 pdf_selection_iface_init);
 				 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_TRANSITION,
 								 pdf_document_page_transition_iface_init);
+				 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_TEXT,
+								 pdf_document_text_iface_init);
 			 });
 
 static void
@@ -1962,21 +1966,33 @@ pdf_selection_get_selection_region (EvSelection     *selection,
 	return retval;
 }
 
+static void
+pdf_selection_iface_init (EvSelectionInterface *iface)
+{
+        iface->render_selection = pdf_selection_render_selection;
+	iface->get_selected_text = pdf_selection_get_selected_text;
+        iface->get_selection_region = pdf_selection_get_selection_region;
+}
+
+
+/* EvDocumentText */
 static GdkRegion *
-pdf_selection_get_selection_map (EvSelection *selection,
-				 EvPage      *page)
+pdf_document_text_get_text_mapping (EvDocumentText *document_text,
+				    EvPage         *page)
 {
 	PopplerPage *poppler_page;
 	PopplerRectangle points;
 	GList *region;
 	GdkRegion *retval;
 
+	g_return_val_if_fail (POPPLER_IS_PAGE (page->backend_page), NULL);
+
 	poppler_page = POPPLER_PAGE (page->backend_page);
 
 	points.x1 = 0.0;
 	points.y1 = 0.0;
 	poppler_page_get_size (poppler_page, &(points.x2), &(points.y2));
-	
+
 	region = poppler_page_get_selection_region (poppler_page, 1.0,
 						    POPPLER_SELECTION_GLYPH,
 						    &points);
@@ -1986,13 +2002,49 @@ pdf_selection_get_selection_map (EvSelection *selection,
 	return retval;
 }
 
+static gchar *
+pdf_document_text_get_text (EvDocumentText  *selection,
+			    EvPage          *page)
+{
+	PopplerPage *poppler_page;
+	PopplerRectangle r;
+
+	g_return_val_if_fail (POPPLER_IS_PAGE (page->backend_page), NULL);
+
+	poppler_page = POPPLER_PAGE (page->backend_page);
+
+	r.x1 = 0;
+	r.y1 = 0;
+	poppler_page_get_size (poppler_page, &(r.x2), &(r.y2));
+
+	return poppler_page_get_text (poppler_page,
+				      POPPLER_SELECTION_WORD,
+				      &r);
+}
+
+static gboolean
+pdf_document_text_get_text_layout (EvDocumentText  *selection,
+				   EvPage          *page,
+				   EvRectangle    **areas,
+				   guint           *n_areas)
+{
+	PopplerPage *poppler_page;
+
+	g_return_val_if_fail (POPPLER_IS_PAGE (page->backend_page), NULL);
+
+	poppler_page = POPPLER_PAGE (page->backend_page);
+
+	return poppler_page_get_text_layout (poppler_page, (PopplerRectangle **)areas, n_areas);
+}
+
 static void
-pdf_selection_iface_init (EvSelectionInterface *iface)
+pdf_document_text_iface_init (EvDocumentTextInterface *iface)
 {
-        iface->render_selection = pdf_selection_render_selection;
-	iface->get_selected_text = pdf_selection_get_selected_text;
-        iface->get_selection_region = pdf_selection_get_selection_region;
-        iface->get_selection_map = pdf_selection_get_selection_map;
+        iface->get_text_mapping = pdf_document_text_get_text_mapping;
+        iface->get_text = pdf_document_text_get_text;
+#ifdef HAVE_POPPLER_PAGE_GET_TEXT_LAYOUT
+        iface->get_text_layout = pdf_document_text_get_text_layout;
+#endif
 }
 
 /* Page Transitions */
diff --git a/configure.ac b/configure.ac
index d193cee..f9afa56 100644
--- a/configure.ac
+++ b/configure.ac
@@ -477,6 +477,10 @@ if test "x$enable_pdf" = "xyes"; then
     PKG_CHECK_MODULES(POPPLER, poppler-glib >= $POPPLER_REQUIRED libxml-2.0 >= $LIBXML_REQUIRED,enable_pdf=yes,enable_pdf=no)
 
     if test "x$enable_pdf" = "xyes"; then
+	    evince_save_LIBS=$LIBS
+	    LIBS="$LIBS $POPPLER_LIBS"
+	    AC_CHECK_FUNCS(poppler_page_get_text_layout)
+	    LIBS=$evince_save_LIBS
 	    PKG_CHECK_MODULES(CAIRO_PDF, cairo-pdf, enable_cairo_pdf=yes, enable_cairo_pdf=no)
 	    if test x$enable_cairo_pdf = xyes; then
 	            AC_DEFINE([HAVE_CAIRO_PDF], [1], [defined if cairo-pdf is available])
diff --git a/libdocument/ev-selection.c b/libdocument/ev-selection.c
index 25879a9..a34e863 100644
--- a/libdocument/ev-selection.c
+++ b/libdocument/ev-selection.c
@@ -75,15 +75,3 @@ ev_selection_get_selection_region (EvSelection     *selection,
 	
 	return iface->get_selection_region (selection, rc, style, points);
 }
-
-GdkRegion *
-ev_selection_get_selection_map (EvSelection *selection,
-				EvPage      *page)
-{
-	EvSelectionInterface *iface = EV_SELECTION_GET_IFACE (selection);
-
-	if (!iface->get_selection_map)
-		return NULL;
-
-	return iface->get_selection_map (selection, page);
-}
diff --git a/libdocument/ev-selection.h b/libdocument/ev-selection.h
index 19b61bb..5c9c718 100644
--- a/libdocument/ev-selection.h
+++ b/libdocument/ev-selection.h
@@ -64,8 +64,6 @@ struct _EvSelectionInterface
 					      EvPage           *page,
 					      EvSelectionStyle  style,
 					      EvRectangle      *points);
-	GdkRegion * (* get_selection_map)    (EvSelection      *selection,
-					      EvPage           *page);
 	GdkRegion * (* get_selection_region) (EvSelection      *selection,
 					      EvRenderContext  *rc,
 					      EvSelectionStyle  style,
@@ -85,13 +83,11 @@ gchar     *ev_selection_get_selected_text    (EvSelection      *selection,
 					      EvPage           *page,
 					      EvSelectionStyle  style,
 					      EvRectangle      *points);
-GdkRegion *ev_selection_get_selection_map    (EvSelection      *selection,
-					      EvPage           *page);
 GdkRegion *ev_selection_get_selection_region (EvSelection      *selection,
 					      EvRenderContext  *rc,
 					      EvSelectionStyle  style,
 					      EvRectangle      *points);
-				  
+
 G_END_DECLS
 
 #endif
diff --git a/libview/ev-jobs.c b/libview/ev-jobs.c
index 140c51a..e723a9f 100644
--- a/libview/ev-jobs.c
+++ b/libview/ev-jobs.c
@@ -36,6 +36,7 @@
 #include "ev-document-print.h"
 #include "ev-document-annotations.h"
 #include "ev-document-attachments.h"
+#include "ev-document-text.h"
 #include "ev-debug.h"
 
 #include <errno.h>
@@ -593,9 +594,9 @@ ev_job_page_data_run (EvJob *job)
 	ev_document_doc_mutex_lock ();
 	ev_page = ev_document_get_page (job->document, job_pd->page);
 
-	if ((job_pd->flags & EV_PAGE_DATA_INCLUDE_TEXT) && EV_IS_SELECTION (job->document))
+	if ((job_pd->flags & EV_PAGE_DATA_INCLUDE_TEXT) && EV_IS_DOCUMENT_TEXT (job->document))
 		job_pd->text_mapping =
-			ev_selection_get_selection_map (EV_SELECTION (job->document), ev_page);
+			ev_document_text_get_text_mapping (EV_DOCUMENT_TEXT (job->document), ev_page);
 	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);