From 975e322d37afaca6e565b37282f2d9e6038124bc Mon Sep 17 00:00:00 2001
From: Brendan Taylor <whateley@gmail.com>
Date: Thu, 13 Jan 2011 12:11:19 -0700
Subject: add a variable @_ that expands to the result of the last sync command

---
 src/uzbl-core.c      |  9 ++++++++-
 src/uzbl-core.h      |  3 ++-
 tests/test-command.c | 17 +++++++++++++++++
 3 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/uzbl-core.c b/src/uzbl-core.c
index ba6b4de..8e14982 100644
--- a/src/uzbl-core.c
+++ b/src/uzbl-core.c
@@ -145,6 +145,7 @@ const struct var_name_to_ptr_t {
     { "SELECTED_URI",           PTR_C_STR(uzbl.state.selected_url,                   NULL)},
     { "NAME",                   PTR_C_STR(uzbl.state.instance_name,                  NULL)},
     { "PID",                    PTR_C_STR(uzbl.info.pid_str,                         NULL)},
+    { "_",                      PTR_C_STR(uzbl.state.last_result,                    NULL)},
 
     { NULL,                     {.ptr.s = NULL, .type = TYPE_INT, .dump = 0, .writeable = 0, .func = NULL}}
 };
@@ -1347,6 +1348,11 @@ run_parsed_command(CommandInfo *c, GArray *a, GString *result) {
         send_event(COMMAND_EXECUTED, tmp->str, NULL);
         g_string_free(tmp, TRUE);
     }
+
+    if(result) {
+      g_free(uzbl.state.last_result);
+      uzbl.state.last_result = g_strdup(result->str);
+    }
 }
 
 void
@@ -2294,7 +2300,8 @@ initialize(int argc, char *argv[]) {
 
     uzbl.state.executable_path = g_strdup(argv[0]);
     uzbl.state.selected_url = NULL;
-    uzbl.state.searchtx = NULL;
+    uzbl.state.searchtx     = NULL;
+    uzbl.state.last_result  = NULL;
 
     GOptionContext* context = g_option_context_new ("[ uri ] - load a uri by default");
     g_option_context_add_main_entries (context, entries, NULL);
diff --git a/src/uzbl-core.h b/src/uzbl-core.h
index ef948ca..049053a 100644
--- a/src/uzbl-core.h
+++ b/src/uzbl-core.h
@@ -98,7 +98,8 @@ typedef struct {
     gchar    *selected_url;
     gchar    *last_selected_url;
     gchar    *executable_path;
-    gchar*   searchtx;
+    gchar   *searchtx;
+    gchar   *last_result;
     gboolean verbose;
     gboolean events_stdout;
     GPtrArray *event_buffer;
diff --git a/tests/test-command.c b/tests/test-command.c
index 7b33405..20c6aa0 100644
--- a/tests/test-command.c
+++ b/tests/test-command.c
@@ -281,6 +281,21 @@ test_js (void) {
     g_string_free(result, TRUE);
 }
 
+void
+test_last_result (void) {
+    GString *result = g_string_new("");
+
+    /* the last result gets set */
+    parse_cmd_line("js -1", result);
+    g_assert_cmpstr("-1", ==, uzbl.state.last_result);
+
+    /* the last result can be used in a chain */
+    parse_cmd_line("chain 'js 1' 'js \\@_ + 1'", result);
+    g_assert_cmpstr("2", ==, uzbl.state.last_result);
+
+    g_string_free(result, TRUE);
+}
+
 void
 test_run_handler_arg_order (void) {
     run_handler("sync_spawn echo uvw xyz", "abc def");
@@ -320,6 +335,8 @@ main (int argc, char *argv[]) {
 
     g_test_add_func("/test-command/js",             test_js);
 
+    g_test_add_func("/test-command/last-result",    test_last_result);
+
     /* the following aren't really "command" tests, but they're not worth
      * splitting into a separate file yet */
     g_test_add_func("/test-command/run_handler/arg-order",      test_run_handler_arg_order);
-- 
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