From 90f6f5dd6e86df8b3825be754e5cd48e683229de Mon Sep 17 00:00:00 2001
From: Moritz Lipp <mlq@pwmt.org>
Date: Tue, 7 Feb 2012 18:34:39 +0100
Subject: [PATCH] Mouse scroll events

---
 config.c    |  6 ++++--
 shortcuts.c | 32 ++++++++++++++++++++++++++++++++
 shortcuts.h | 11 +++++++++++
 3 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/config.c b/config.c
index 8490cb5..ec6f8ba 100644
--- a/config.c
+++ b/config.c
@@ -134,8 +134,10 @@ config_load_default(zathura_t* zathura)
   girara_shortcut_add(gsession, 0,                0,              "z0", sc_zoom,                     FULLSCREEN, ZOOM_ORIGINAL,   NULL);
 
   /* mouse events */
-  girara_mouse_event_add(gsession, 0, 0, sc_mouse_scroll, NORMAL,     0, NULL);
-  girara_mouse_event_add(gsession, 0, 0, sc_mouse_scroll, FULLSCREEN, 0, NULL);
+  girara_mouse_event_add(gsession, 0, 0,                sc_mouse_scroll, NORMAL,     0, NULL);
+  girara_mouse_event_add(gsession, 0, 0,                sc_mouse_scroll, FULLSCREEN, 0, NULL);
+  girara_mouse_event_add(gsession, GDK_CONTROL_MASK, 0, sc_mouse_zoom,   NORMAL,     0, NULL);
+  girara_mouse_event_add(gsession, GDK_CONTROL_MASK, 0, sc_mouse_zoom,   FULLSCREEN, 0, NULL);
 
   /* define default inputbar commands */
   girara_inputbar_command_add(gsession, "bmark",   NULL, cmd_bookmark_create, NULL,         "Add a bookmark");
diff --git a/shortcuts.c b/shortcuts.c
index 8f148f4..11ebdac 100644
--- a/shortcuts.c
+++ b/shortcuts.c
@@ -207,6 +207,38 @@ sc_mouse_scroll(girara_session_t* session, girara_argument_t* argument, girara_e
   return false;
 }
 
+bool
+sc_mouse_zoom(girara_session_t* session, girara_argument_t* argument, girara_event_t* event, unsigned int t)
+{
+  g_return_val_if_fail(session != NULL, false);
+  g_return_val_if_fail(session->global.data != NULL, false);
+  zathura_t* zathura = session->global.data;
+  g_return_val_if_fail(argument != NULL, false);
+  g_return_val_if_fail(event != NULL, false);
+
+  if (zathura->document == NULL) {
+    return false;
+  }
+
+  /* scroll event */
+  if (event->type == GIRARA_EVENT_SCROLL) {
+    switch (event->direction) {
+      case GIRARA_SCROLL_UP:
+        argument->n = ZOOM_IN;
+        break;
+      case GIRARA_SCROLL_DOWN:
+        argument->n = ZOOM_OUT;
+        break;
+      default:
+        return false;
+    }
+
+    return sc_zoom(session, argument, NULL, t);
+  }
+
+  return false;
+}
+
 bool
 sc_navigate(girara_session_t* session, girara_argument_t* argument,
     girara_event_t* UNUSED(event), unsigned int t)
diff --git a/shortcuts.h b/shortcuts.h
index 01d74a3..1629d74 100644
--- a/shortcuts.h
+++ b/shortcuts.h
@@ -71,6 +71,17 @@ bool sc_goto(girara_session_t* session, girara_argument_t* argument, girara_even
  */
 bool sc_mouse_scroll(girara_session_t* session, girara_argument_t* argument, girara_event_t* event, unsigned int t);
 
+/**
+ * Handle mouse zoom events
+ *
+ * @param session The used girara session
+ * @param argument The used argument
+ * @param event Girara event
+ * @param t Number of executions
+ * @return true if no error occured otherwise false
+ */
+bool sc_mouse_zoom(girara_session_t* session, girara_argument_t* argument, girara_event_t* event, unsigned int t);
+
 /**
  * Navigate through the document
  *