Allow user to interact with --text-info --html WebView

This commit changes the default --text-view behavior (when --html
is also in effect) so that the clicked links are opened in the
default browser (closes #732626).

Additionally, a new option is introduced, --prevent-interaction,
which disables above behavior.

src/option.c

@@ -113,6 +113,7 @@ static gboolean zenity_text_auto_scroll;
 
 #ifdef HAVE_WEBKITGTK
 static gboolean zenity_text_enable_html;
+static gboolean zenity_text_no_interaction;
 static gchar   *zenity_text_url;
 #endif
 
@@ -915,6 +916,15 @@ static GOptionEntry text_options[] = {
     N_("Enable html support"),
     NULL
   },
+  {
+    "no-interaction",
+    '\0',
+    G_OPTION_FLAG_NOALIAS,
+    G_OPTION_ARG_NONE,
+    &zenity_text_no_interaction,
+    N_("Do not enable user interaction with the WebView. Only works if you use --html option"),
+    NULL
+  },
   {
     "url",
     '\0',
@@ -1600,6 +1610,7 @@ zenity_text_pre_callback (GOptionContext *context,
   zenity_text_auto_scroll = FALSE;
 #ifdef HAVE_WEBKITGTK
   zenity_text_enable_html = FALSE;
+  zenity_text_no_interaction = FALSE;
   zenity_text_url = NULL;
 #endif
   return TRUE;
@@ -2028,6 +2039,7 @@ zenity_text_post_callback (GOptionContext *context,
     results->text_data->auto_scroll = zenity_text_auto_scroll;
 #ifdef HAVE_WEBKITGTK
     results->text_data->html = zenity_text_enable_html;
+    results->text_data->no_interaction = zenity_text_no_interaction;
     results->text_data->url = zenity_text_url;
 #endif
   } else {

src/text.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <gio/gio.h>
 #include "zenity.h"
 #include "util.h"
 
@@ -114,6 +115,11 @@ zenity_text_webview_decision_request (WebKitWebView             *webkitwebview,
                                       gpointer                   user_data)
 {
   webkit_web_policy_decision_ignore (policy_decision);
+  if (!zen_text_data->no_interaction &&
+      webkit_web_navigation_action_get_reason (navigation_action) == WEBKIT_WEB_NAVIGATION_REASON_LINK_CLICKED) {
+    g_app_info_launch_default_for_uri (webkit_web_navigation_action_get_original_uri(navigation_action),
+                                       NULL, NULL);
+  }
   return TRUE;
 }
 
@@ -333,7 +339,7 @@ zenity_text (ZenityData *data, ZenityTextData *text_data)
     }
 
     // We don't want user to click on links and navigate to another page.
-    // So, when page finish load, we block requests.
+    // So, when the page finishes loading, we take handle of the requests.
 
     g_signal_connect (G_OBJECT (web_kit), "document-load-finished",
                       G_CALLBACK (zenity_text_webview_load_finished), NULL); 

src/zenity.h

@@ -118,6 +118,7 @@ typedef struct {
   gchar         *checkbox;
 #ifdef HAVE_WEBKITGTK
   gboolean       html;
+  gboolean       no_interaction;
   gchar         *url;
 #endif
 } ZenityTextData;