[recipes/image-links: 2/3] Support links for switching the image in the instructions.

[Matthias Clasen <matthiasc src gnome org>]

commit 1b497a0aea06a62e328cf6ee343dc521e6310a45
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 3 16:28:52 2017 -0500

    Support links for switching the image in the instructions.

 src/gr-details-page.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/src/gr-details-page.c b/src/gr-details-page.c
index 26c6aac..77b3ef5 100644
--- a/src/gr-details-page.c
+++ b/src/gr-details-page.c
@@ -787,6 +787,23 @@ populate_ingredients (GrDetailsPage *page,
         }
 }
 
+static gboolean
+activate_link (GtkLabel *label,
+               const char *uri,
+               GrDetailsPage *page)
+{
+        if (g_str_has_prefix (uri, "image:")) {
+                int idx;
+
+                idx = (int)g_ascii_strtoll (uri + strlen ("image:"), NULL, 10);
+                gr_image_viewer_show_image (GR_IMAGE_VIEWER (page->recipe_image), idx);
+
+                return TRUE;
+        }
+
+        return FALSE;
+}
+
 void
 gr_details_page_set_recipe (GrDetailsPage *page,
                             GrRecipe      *recipe)
@@ -837,6 +854,8 @@ gr_details_page_set_recipe (GrDetailsPage *page,
         else
                 gtk_label_set_label (GTK_LABEL (page->cook_time_label), _(cook_time));
         gtk_label_set_label (GTK_LABEL (page->instructions_label), instructions);
+        gtk_label_set_use_markup (GTK_LABEL (page->instructions_label), TRUE);
+        g_signal_connect (page->instructions_label, "activate-link", G_CALLBACK (activate_link), page);
 
         gtk_spin_button_set_value (GTK_SPIN_BUTTON (page->serves_spin), serves);
         gtk_widget_set_sensitive (page->serves_spin, ing != NULL);