badwolf.c: Add zoom on ctrl+scroll

2 files changed, 30 insertions, 1 deletions

diff --git a/badwolf.1 b/badwolf.1
index e996fd1..76dab96 100644
--- a/badwolf.1
+++ b/badwolf.1
@@ -18,7 +18,15 @@ Runtime configuration specific to
 .Nm
 will probably get added at a later release.
 .Sh KEYBINDINGS
-For now it only has the default Webkit/GTK keybindings, which notably are (C for Control, S for Shift):
+The following section lists the keybinding by their action, each item is described by the widget the focus is on or
+.Aq any
+if it works for the whole window, followed by the keybind it grabs. C is short for Control, S is short for Shift.
+.Bl -width Ds -tag
+.It webview C-Scroll
+Zooms the webpage in/out.
+.El
+.Ss DEFAULT ONES
+Here is a incomplete list of the default Webkit/GTK keybindings:
 .Bl -width Ds -tag
 .It any C-PageUp / C-PageDown
 Go to the previous/next tab
diff --git a/badwolf.c b/badwolf.c
index 1fef34e..e8cd46a 100644
--- a/badwolf.c
+++ b/badwolf.c
@@ -322,6 +322,26 @@ WebViewCb_mouse_target_changed(WebKitWebView *webView,
 	return TRUE;
 }
 
+static gboolean
+WebViewCb_scroll_event(GtkWidget *widget, GdkEvent *event, gpointer data)
+{
+	(void)widget;
+	struct Client *browser = (struct Client *)data;
+	gdouble delta_x, delta_y;
+	gfloat zoom;
+
+	if(((GdkEventScroll *)event)->state & GDK_CONTROL_MASK)
+	{
+		gdk_event_get_scroll_deltas(event, &delta_x, &delta_y);
+		zoom = webkit_web_view_get_zoom_level(WEBKIT_WEB_VIEW(browser->webView));
+		zoom -= delta_y * 0.1;
+		webkit_web_view_set_zoom_level(WEBKIT_WEB_VIEW(browser->webView), zoom);
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
 static WebKitWebView *
 WebViewCb_create(WebKitWebView *related_web_view,
                  WebKitNavigationAction *navigation_action,
@@ -517,6 +537,7 @@ new_browser(struct Window *window, gchar *target_url, WebKitWebView *related_web
 	g_signal_connect(browser->webView, "close", G_CALLBACK(WebViewCb_close), browser);
 	g_signal_connect(
 	    browser->webView, "key-press-event", G_CALLBACK(WebViewCb_key_press_event), browser);
+	g_signal_connect(browser->webView, "scroll-event", G_CALLBACK(WebViewCb_scroll_event), browser);
 
 	g_signal_connect(browser->search, "next-match", G_CALLBACK(SearchEntryCb_next__match), browser);
 	g_signal_connect(