Add EvPage so that we can hold a reference to the backend page. Form

[evince.git] / backend / pdf / ev-poppler.cc

diff --git a/backend/pdf/ev-poppler.cc b/backend/pdf/ev-poppler.cc
index 01c9a698f8cf96ace3c47f4f66ae12815e8f7ccc..2b6d41597bc4a11fe2c2a4513956c9634d06ed91 100644 (file)
--- a/backend/pdf/ev-poppler.cc
+++ b/backend/pdf/ev-poppler.cc
@@ -148,19 +148,6 @@ EV_BACKEND_REGISTER_WITH_CODE (PdfDocument, pdf_document,
                                                                 pdf_document_page_transition_iface_init);
                         });
 
-static void
-set_rc_data (PdfDocument     *pdf_document,
-            EvRenderContext *rc)
-{
-       if (rc->data == NULL) {
-               rc->data = poppler_document_get_page (pdf_document->document,
-                                                     rc->page);
-               rc->destroy = g_object_unref;
-       } else {
-               g_assert (rc->page == poppler_page_get_index (POPPLER_PAGE (rc->data)));
-       }
-}
-
 static void
 pdf_document_search_free (PdfDocumentSearch   *search)
 {
@@ -296,35 +283,45 @@ pdf_document_get_n_pages (EvDocument *document)
        return poppler_document_get_n_pages (PDF_DOCUMENT (document)->document);
 }
 
-static void
-pdf_document_get_page_size (EvDocument   *document,
-                           int           page,
-                           double       *width,
-                           double       *height)
+static EvPage *
+pdf_document_get_page (EvDocument *document,
+                      gint        index)
 {
        PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerPage *poppler_page;
+       EvPage      *page;
 
-       poppler_page = poppler_document_get_page (pdf_document->document, page);
-       poppler_page_get_size (poppler_page, width, height);
+       poppler_page = poppler_document_get_page (pdf_document->document, index);
+       page = ev_page_new (index);
+       page->backend_page = (EvBackendPage)g_object_ref (poppler_page);
+       page->backend_destroy_func = (EvBackendPageDestroyFunc)g_object_unref;
        g_object_unref (poppler_page);
+
+       return page;
+}
+
+static void
+pdf_document_get_page_size (EvDocument *document,
+                           EvPage     *page,
+                           double     *width,
+                           double     *height)
+{
+       g_return_if_fail (POPPLER_IS_PAGE (page->backend_page));
+       
+       poppler_page_get_size (POPPLER_PAGE (page->backend_page), width, height);
 }
 
 static char *
 pdf_document_get_page_label (EvDocument *document,
-                            int         page)
+                            EvPage     *page)
 {
-       PopplerPage *poppler_page;
        char *label = NULL;
 
-       poppler_page = poppler_document_get_page (PDF_DOCUMENT (document)->document,
-                                                 page);
+       g_return_val_if_fail (POPPLER_IS_PAGE (page->backend_page), NULL);
 
-       g_object_get (G_OBJECT (poppler_page),
+       g_object_get (G_OBJECT (page->backend_page),
                      "label", &label,
                      NULL);
-       g_object_unref (poppler_page);
-
        return label;
 }
 
@@ -504,14 +501,13 @@ pdf_document_render (EvDocument      *document,
                     EvRenderContext *rc)
 {
        PdfDocument *pdf_document;
+       PopplerPage *poppler_page;
        double width_points, height_points;
        gint width, height;
 
-       pdf_document = PDF_DOCUMENT (document);
-
-       set_rc_data (pdf_document, rc);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
 
-       poppler_page_get_size (POPPLER_PAGE (rc->data),
+       poppler_page_get_size (poppler_page,
                               &width_points, &height_points);
        
        if (rc->rotation == 90 || rc->rotation == 270) {
@@ -522,7 +518,7 @@ pdf_document_render (EvDocument      *document,
                height = (int) ((height_points * rc->scale) + 0.5);
        }
        
-       return pdf_page_render (POPPLER_PAGE (rc->data),
+       return pdf_page_render (poppler_page,
                                width, height, rc);
 }
 
@@ -555,6 +551,7 @@ pdf_document_get_info (EvDocument *document)
        PopplerPageMode mode;
        PopplerViewerPreferences view_prefs;
        PopplerPermissions permissions;
+       EvPage *page;
 
        info = g_new0 (EvDocumentInfo, 1);
 
@@ -593,9 +590,11 @@ pdf_document_get_info (EvDocument *document)
                      "linearized", &(info->linearized),
                      NULL);
 
-       pdf_document_get_page_size(document, 0,
+       page = ev_document_get_page (document, 0);
+       ev_document_get_page_size (document, page,
                                   &(info->paper_width),
                                   &(info->paper_height));
+       g_object_unref (page);
 
        // Convert to mm.
        info->paper_width = info->paper_width / 72.0f * 25.4f;
@@ -698,6 +697,7 @@ pdf_document_document_iface_init (EvDocumentIface *iface)
        iface->save = pdf_document_save;
        iface->load = pdf_document_load;
        iface->get_n_pages = pdf_document_get_n_pages;
+       iface->get_page = pdf_document_get_page;
        iface->get_page_size = pdf_document_get_page_size;
        iface->get_page_label = pdf_document_get_page_label;
        iface->has_attachments = pdf_document_has_attachments;
@@ -1281,15 +1281,12 @@ pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails
                                       EvRenderContext      *rc, 
                                       gboolean              border)
 {
-       PdfDocument *pdf_document;
+       PdfDocument *pdf_document = PDF_DOCUMENT (document_thumbnails);
        PopplerPage *poppler_page;
        GdkPixbuf *pixbuf = NULL;
        GdkPixbuf *border_pixbuf;
 
-       pdf_document = PDF_DOCUMENT (document_thumbnails);
-
-       poppler_page = poppler_document_get_page (pdf_document->document, rc->page);
-       g_return_val_if_fail (poppler_page != NULL, NULL);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
 
 #ifdef POPPLER_WITH_GDK
        pixbuf = poppler_page_get_thumbnail_pixbuf (poppler_page);
@@ -1303,7 +1300,6 @@ pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails
        }
 #endif /* POPPLER_WITH_GDK */
 
-               
        if (pixbuf) {
                /* Rotate provided thumbnail if needed */
                GdkPixbuf *rotated_pixbuf;
@@ -1323,8 +1319,6 @@ pdf_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document_thumbnails
                pixbuf = border_pixbuf;
        }               
 
-       g_object_unref (poppler_page);
-       
        return pixbuf;
 }
 
@@ -1334,14 +1328,10 @@ pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnail
                                        gint                 *width,
                                        gint                 *height)
 {
-       PdfDocument *pdf_document;
        PopplerPage *poppler_page;
        gint has_thumb;
        
-       pdf_document = PDF_DOCUMENT (document_thumbnails);
-       poppler_page = poppler_document_get_page (pdf_document->document, rc->page);
-
-       g_return_if_fail (poppler_page != NULL);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
 
        has_thumb = poppler_page_get_thumbnail_size (poppler_page, width, height);
 
@@ -1361,8 +1351,6 @@ pdf_document_thumbnails_get_dimensions (EvDocumentThumbnails *document_thumbnail
                *width = *height;
                *height = temp;
        }
-       
-       g_object_unref (poppler_page);
 }
 
 static void
@@ -1709,7 +1697,7 @@ pdf_document_file_exporter_do_page (EvFileExporter  *exporter,
 
        g_return_if_fail (pdf_document->print_ctx != NULL);
 
-       poppler_page = poppler_document_get_page (pdf_document->document, rc->page);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
        
 #ifdef HAVE_CAIRO_PRINT
        x = (ctx->pages_printed % ctx->pages_per_sheet) % ctx->pages_x;
@@ -1795,8 +1783,6 @@ pdf_document_file_exporter_do_page (EvFileExporter  *exporter,
        if (ctx->format == EV_FILE_FORMAT_PS)
                poppler_page_render_to_ps (poppler_page, ctx->ps_file);
 #endif /* HAVE_CAIRO_PRINT */
-       
-       g_object_unref (poppler_page);
 }
 
 static void
@@ -1867,14 +1853,13 @@ pdf_selection_render_selection (EvSelection      *selection,
                                GdkColor         *text,
                                GdkColor         *base)
 {
-       PdfDocument *pdf_document;
+       PopplerPage *poppler_page;
        double width_points, height_points;
        gint width, height;
 
-       pdf_document = PDF_DOCUMENT (selection);
-       set_rc_data (pdf_document, rc);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
 
-       poppler_page_get_size (POPPLER_PAGE (rc->data),
+       poppler_page_get_size (poppler_page,
                               &width_points, &height_points);
        width = (int) ((width_points * rc->scale) + 0.5);
        height = (int) ((height_points * rc->scale) + 0.5);
@@ -1903,7 +1888,7 @@ pdf_selection_render_selection (EvSelection      *selection,
        memset (cairo_image_surface_get_data (*surface), 0x00,
                cairo_image_surface_get_height (*surface) *
                cairo_image_surface_get_stride (*surface));
-       poppler_page_render_selection (POPPLER_PAGE (rc->data),
+       poppler_page_render_selection (poppler_page,
                                       cr,
                                       (PopplerRectangle *)points,
                                       (PopplerRectangle *)old_points,
@@ -1918,7 +1903,7 @@ pdf_selection_render_selection (EvSelection      *selection,
                                 TRUE, 8,
                                 width, height);
 
-       poppler_page_render_selection_to_pixbuf (POPPLER_PAGE (rc->data),
+       poppler_page_render_selection_to_pixbuf (poppler_page,
                                                 rc->scale, rc->rotation, pixbuf,
                                                 (PopplerRectangle *)points,
                                                 (PopplerRectangle *)old_points,
@@ -1938,14 +1923,12 @@ pdf_selection_get_selected_text (EvSelection     *selection,
                                 EvSelectionStyle style,
                                 EvRectangle     *points)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (selection);
        PopplerPage *poppler_page;
        PopplerRectangle r;
        double height;
        char *retval;
        
-       poppler_page = poppler_document_get_page (pdf_document->document, rc->page);
-       g_return_val_if_fail (poppler_page != NULL, NULL);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
 
        poppler_page_get_size (poppler_page, NULL, &height);
        r.x1 = points->x1;
@@ -1957,8 +1940,6 @@ pdf_selection_get_selected_text (EvSelection     *selection,
                                        (PopplerSelectionStyle)style,
                                        &r);
 
-       g_object_unref (poppler_page);
-
        return retval;
 }
 
@@ -1994,15 +1975,13 @@ pdf_selection_get_selection_region (EvSelection     *selection,
                                    EvSelectionStyle style,
                                    EvRectangle     *points)
 {
-       PdfDocument *pdf_document;
+       PopplerPage *poppler_page;
        GdkRegion   *retval;
-       GList *region;
+       GList       *region;
 
-       pdf_document = PDF_DOCUMENT (selection);
-
-       set_rc_data (pdf_document, rc);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
        
-       region = poppler_page_get_selection_region (POPPLER_PAGE (rc->data),
+       region = poppler_page_get_selection_region (poppler_page,
                                                    rc->scale,
                                                    (PopplerSelectionStyle)style,
                                                    (PopplerRectangle *) points);
@@ -2016,15 +1995,12 @@ static GdkRegion *
 pdf_selection_get_selection_map (EvSelection     *selection,
                                 EvRenderContext *rc)
 {
-       PdfDocument *pdf_document;
        PopplerPage *poppler_page;
        PopplerRectangle points;
        GList *region;
        GdkRegion *retval;
 
-       pdf_document = PDF_DOCUMENT (selection);
-       poppler_page = poppler_document_get_page (pdf_document->document,
-                                                 rc->page);
+       poppler_page = POPPLER_PAGE (rc->page->backend_page);
 
        points.x1 = 0.0;
        points.y1 = 0.0;
@@ -2035,7 +2011,6 @@ pdf_selection_get_selection_map (EvSelection     *selection,
                                                    &points);
        retval = create_gdk_region_from_poppler_region (region);
        g_list_free (region);
-       g_object_unref (poppler_page);
 
        return retval;
 }
@@ -2239,17 +2214,17 @@ ev_form_field_from_poppler_field (PopplerFormField *poppler_field)
 
 static GList *
 pdf_document_forms_get_form_fields (EvDocumentForms *document, 
-                                   gint             page)
+                                   EvPage          *page)
 {
-       PdfDocument *pdf_document;
        PopplerPage *poppler_page;
        GList *retval = NULL;
        GList *fields;
        GList *list;
        double height;
 
-       pdf_document = PDF_DOCUMENT (document);
-       poppler_page = poppler_document_get_page (pdf_document->document, page);
+       g_return_val_if_fail (POPPLER_IS_PAGE (page->backend_page), NULL);
+       
+       poppler_page = POPPLER_PAGE (page->backend_page);
        fields = poppler_page_get_form_field_mapping (poppler_page);
        poppler_page_get_size (poppler_page, NULL, &height);
 
@@ -2270,13 +2245,17 @@ pdf_document_forms_get_form_fields (EvDocumentForms *document,
                field_mapping->y1 = height - mapping->area.y2;
                field_mapping->y2 = height - mapping->area.y1;
                field_mapping->field = ev_field;
-               field_mapping->field->page = page;
+               field_mapping->field->page = EV_PAGE (g_object_ref (page));
+
+               g_object_set_data_full (G_OBJECT (ev_field),
+                                       "poppler-field",
+                                       g_object_ref (mapping->field),
+                                       (GDestroyNotify) g_object_unref);
                
                retval = g_list_prepend (retval, field_mapping);
        }
        
        poppler_page_free_form_field_mapping (fields);
-       g_object_unref (poppler_page);
 
        return g_list_reverse (retval);
 }
@@ -2286,16 +2265,14 @@ pdf_document_forms_form_field_text_get_text (EvDocumentForms *document,
                                             EvFormField     *field)
        
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
        gchar *text;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return NULL;
        
        text = poppler_form_field_text_get_text (poppler_field);
-       g_object_unref (poppler_field);
 
        return text;
 }
@@ -2305,14 +2282,12 @@ pdf_document_forms_form_field_text_set_text (EvDocumentForms *document,
                                             EvFormField     *field,
                                             const gchar     *text)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return;
        poppler_form_field_text_set_text (poppler_field, text);
-       g_object_unref (poppler_field);
 }
 
 static void
@@ -2320,31 +2295,27 @@ pdf_document_forms_form_field_button_set_state (EvDocumentForms *document,
                                                EvFormField     *field,
                                                gboolean         state)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return;
        
        poppler_form_field_button_set_state (poppler_field, state);
-       g_object_unref (poppler_field);
 }
 
 static gboolean
 pdf_document_forms_form_field_button_get_state (EvDocumentForms *document, 
                                                EvFormField     *field)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
        gboolean state;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return FALSE;
 
        state = poppler_form_field_button_get_state (poppler_field);
-       g_object_unref (poppler_field);
 
        return state;
 }
@@ -2354,16 +2325,14 @@ pdf_document_forms_form_field_choice_get_item (EvDocumentForms *document,
                                               EvFormField     *field,
                                               gint             index)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
        gchar *text;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return NULL;
 
        text = poppler_form_field_choice_get_item (poppler_field, index);
-       g_object_unref (poppler_field);
 
        return text;
 }
@@ -2372,16 +2341,14 @@ static int
 pdf_document_forms_form_field_choice_get_n_items (EvDocumentForms *document, 
                                                  EvFormField     *field)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
        gint n_items;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return -1;
        
        n_items = poppler_form_field_choice_get_n_items (poppler_field);
-       g_object_unref (poppler_field);
 
        return n_items;
 }
@@ -2391,16 +2358,14 @@ pdf_document_forms_form_field_choice_is_item_selected (EvDocumentForms *document
                                                       EvFormField     *field,
                                                       gint             index)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
        gboolean selected;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return FALSE;
 
        selected = poppler_form_field_choice_is_item_selected (poppler_field, index);
-       g_object_unref (poppler_field);
 
        return selected;
 }
@@ -2410,15 +2375,13 @@ pdf_document_forms_form_field_choice_select_item (EvDocumentForms *document,
                                                  EvFormField     *field,
                                                  gint             index)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return;
 
        poppler_form_field_choice_select_item (poppler_field, index);
-       g_object_unref (poppler_field);
 }
 
 static void
@@ -2426,30 +2389,26 @@ pdf_document_forms_form_field_choice_toggle_item (EvDocumentForms *document,
                                                  EvFormField     *field,
                                                  gint             index)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return;
 
        poppler_form_field_choice_toggle_item (poppler_field, index);
-       g_object_unref (poppler_field);
 }
 
 static void
 pdf_document_forms_form_field_choice_unselect_all (EvDocumentForms *document, 
                                                   EvFormField     *field)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return;
        
        poppler_form_field_choice_unselect_all (poppler_field);
-       g_object_unref (poppler_field);
 }
 
 static void
@@ -2457,31 +2416,27 @@ pdf_document_forms_form_field_choice_set_text (EvDocumentForms *document,
                                               EvFormField     *field,
                                               const gchar     *text)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return;
        
        poppler_form_field_choice_set_text (poppler_field, text);
-       g_object_unref (poppler_field);
 }
 
 static gchar *
 pdf_document_forms_form_field_choice_get_text (EvDocumentForms *document,
                                               EvFormField     *field)
 {
-       PdfDocument *pdf_document = PDF_DOCUMENT (document);
        PopplerFormField *poppler_field;
        gchar *text;
 
-       poppler_field = poppler_document_get_form_field (pdf_document->document, field->id);
+       poppler_field = POPPLER_FORM_FIELD (g_object_get_data (G_OBJECT (field), "poppler-field"));
        if (!poppler_field)
                return NULL;
 
        text = poppler_form_field_choice_get_text (poppler_field);
-       g_object_unref (poppler_field);
 
        return text;
 }