From fdbc0adb186d0abe0de1e0164c5de9d533748bdd Mon Sep 17 00:00:00 2001
From: Tom Adams <tom@holizz.com>
Date: Wed, 22 Jul 2009 00:18:57 +0100
Subject: [PATCH] Only navigate to URI if scheme_handler doesn't print "USED".

---
 examples/data/uzbl/scripts/scheme.py |   22 +++++++++++++----
 uzbl.c                               |   43 +++++++++++++++++++++++++++++-----
 uzbl.h                               |    3 +++
 3 files changed, 57 insertions(+), 11 deletions(-)

diff --git a/examples/data/uzbl/scripts/scheme.py b/examples/data/uzbl/scripts/scheme.py
index c09db08..dde9ba1 100755
--- a/examples/data/uzbl/scripts/scheme.py
+++ b/examples/data/uzbl/scripts/scheme.py
@@ -2,13 +2,25 @@
 
 import os, subprocess, sys, urlparse
 
+def detach_open(cmd):
+    # Thanks to the vast knowledge of Laurence Withers (lwithers) and this message:
+    # http://mail.python.org/pipermail/python-list/2006-November/587523.html
+    if not os.fork():
+        null = os.open(os.devnull,os.O_WRONLY)
+        for i in range(3): os.dup2(null,i)
+        os.close(null)
+        subprocess.Popen(cmd)
+
 if __name__ == '__main__':
     uri = sys.argv[8]
     u = urlparse.urlparse(uri)
     if u.scheme == 'mailto':
-        subprocess.call(['xterm', '-e', 'mail %s' % u.path])
+        detach_open(['xterm', '-e', 'mail %s' % u.path])
     elif u.scheme == 'xmpp':
-        subprocess.call(['gajim-remote', 'open_chat', uri])
-    #elif u.scheme == 'git':
-        #os.chdir(os.path.expanduser('~/src'))
-        #subprocess.call(['git', 'clone', uri])
+        detach_open(['gajim-remote', 'open_chat', uri])
+    elif u.scheme == 'git':
+        detach_open(['git', 'clone', uri], cwd=os.path.expanduser('~/src'))
+    else:
+        print 'DIY!'
+        exit()
+    print 'USED'
diff --git a/uzbl.c b/uzbl.c
index 1a5094e..381222d 100644
--- a/uzbl.c
+++ b/uzbl.c
@@ -135,7 +135,7 @@ const struct {
     { "download_handler",    PTR_V(uzbl.behave.download_handler,    STR,  1,   NULL)},
     { "cookie_handler",      PTR_V(uzbl.behave.cookie_handler,      STR,  1,   cmd_cookie_handler)},
     { "new_window",          PTR_V(uzbl.behave.new_window,          STR,  1,   NULL)},
-    { "scheme_handler",      PTR_V(uzbl.behave.scheme_handler,      STR,  1,   NULL)},
+    { "scheme_handler",      PTR_V(uzbl.behave.scheme_handler,      STR,  1,   cmd_scheme_handler)},
     { "fifo_dir",            PTR_V(uzbl.behave.fifo_dir,            STR,  1,   cmd_fifo_dir)},
     { "socket_dir",          PTR_V(uzbl.behave.socket_dir,          STR,  1,   cmd_socket_dir)},
     { "http_debug",          PTR_V(uzbl.behave.http_debug,          INT,  1,   cmd_http_debug)},
@@ -525,12 +525,15 @@ navigation_decision_cb (WebKitWebView *web_view, WebKitWebFrame *frame, WebKitNe
     (void) web_view;
     (void) frame;
     (void) navigation_action;
-    (void) policy_decision;
     (void) user_data;
+
     const gchar* uri = webkit_network_request_get_uri (request);
+    SoupURI *suri = soup_uri_new(uri);
+    gboolean decision_made = FALSE;
+
     if (uzbl.state.verbose)
         printf("Navigation requested -> %s\n", uri);
-    SoupURI *suri = soup_uri_new(uri);
+
     if (suri && strcmp (suri->scheme, "http") &&
                 strcmp (suri->scheme, "https") &&
                 strcmp (suri->scheme, "data") &&
@@ -539,12 +542,27 @@ navigation_decision_cb (WebKitWebView *web_view, WebKitWebFrame *frame, WebKitNe
         if (uzbl.behave.scheme_handler) {
             GString *s = g_string_new ("");
             g_string_printf(s, "'%s'", uri);
+
             run_handler(uzbl.behave.scheme_handler, s->str);
-            webkit_web_policy_decision_ignore(policy_decision);
-            return TRUE;
+
+            if(uzbl.comm.sync_stdout && strcmp (uzbl.comm.sync_stdout, "") != 0) {
+                char *p = strchr(uzbl.comm.sync_stdout, '\n' );
+                if ( p != NULL ) *p = '\0';
+                if (!strcmp(uzbl.comm.sync_stdout, "USED")) {
+                    webkit_web_policy_decision_ignore(policy_decision);
+                    decision_made = TRUE;
+                }
+            }
+            if (uzbl.comm.sync_stdout)
+                uzbl.comm.sync_stdout = strfree(uzbl.comm.sync_stdout);
+
+            g_string_free(s, TRUE);
         }
     }
-    return FALSE;
+    if (!decision_made)
+        webkit_web_policy_decision_use(policy_decision);
+
+    return TRUE;
 }
 
 gboolean
@@ -1641,6 +1659,19 @@ cmd_cookie_handler() {
 }
 
 void
+cmd_scheme_handler() {
+    gchar **split = g_strsplit(uzbl.behave.scheme_handler, " ", 2);
+    /* pitfall: doesn't handle chain actions; must the sync_ action manually */
+    if ((g_strcmp0(split[0], "sh") == 0) ||
+        (g_strcmp0(split[0], "spawn") == 0)) {
+        g_free (uzbl.behave.scheme_handler);
+        uzbl.behave.scheme_handler =
+            g_strdup_printf("sync_%s %s", split[0], split[1]);
+    }
+    g_strfreev (split);
+}
+
+void
 cmd_fifo_dir() {
     uzbl.behave.fifo_dir = init_fifo(uzbl.behave.fifo_dir);
 }
diff --git a/uzbl.h b/uzbl.h
index 55243ee..b0a0171 100644
--- a/uzbl.h
+++ b/uzbl.h
@@ -506,6 +506,9 @@ void
 cmd_cookie_handler();
 
 void
+cmd_scheme_handler();
+
+void
 move_statusbar();
 
 void
-- 
1.7.9.5