core: add signals "buffer_filters_enabled" and "buffer_filters_disabled"

ChangeLog.adoc

@@ -20,6 +20,7 @@ https://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 
 New features::
 
+  * core: add signals "buffer_filters_enabled" and "buffer_filters_disabled"
   * core: support loading of plugins from path in environment variable "WEECHAT_EXTRA_LIBDIR" (issue #971, issue #979)
   * alias: add infolist "alias_default" (list of default aliases)
   * buflist: add option buflist.look.add_newline (issue #1027)

doc/en/weechat_plugin_api.en.adoc

@@ -9454,6 +9454,16 @@ List of signals sent by WeeChat and plugins:
   Pointer: buffer. |
   Buffer cleared.
 
+| weechat | buffer_filters_enabled +
+  _(WeeChat ≥ 2.0)_ |
+  Pointer: buffer. |
+  Filters enabled in buffer.
+
+| weechat | buffer_filters_disabled +
+  _(WeeChat ≥ 2.0)_ |
+  Pointer: buffer. |
+  Filters disabled in buffer.
+
 | weechat | buffer_hidden |
   Pointer: buffer. |
   Buffer hidden.

doc/fr/weechat_plugin_api.fr.adoc

@@ -9638,6 +9638,16 @@ Liste des signaux envoyés par WeeChat et les extensions :
   Pointeur : tampon. |
   Tampon vidé.
 
+| weechat | buffer_filters_enabled +
+  _(WeeChat ≥ 2.0)_ |
+  Pointeur : tampon. |
+  Filtres activés dans le tampon.
+
+| weechat | buffer_filters_disabled +
+  _(WeeChat ≥ 2.0)_ |
+  Pointeur : tampon. |
+  Filtres désactivés dans le tampon.
+
 | weechat | buffer_hidden |
   Pointeur : tampon. |
   Tampon masqué.

doc/it/weechat_plugin_api.it.adoc

@@ -9781,6 +9781,18 @@ List of signals sent by WeeChat and plugins:
   Puntatore: buffer. |
   Buffer cleared.
 
+// TRANSLATION MISSING
+| weechat | buffer_filters_enabled +
+  _(WeeChat ≥ 2.0)_ |
+  Pointer: buffer. |
+  Filters enabled in buffer.
+
+// TRANSLATION MISSING
+| weechat | buffer_filters_disabled +
+  _(WeeChat ≥ 2.0)_ |
+  Pointer: buffer. |
+  Filters disabled in buffer.
+
 // TRANSLATION MISSING
 | weechat | buffer_hidden |
   Pointer: buffer. |

doc/ja/weechat_plugin_api.ja.adoc

@@ -9468,6 +9468,18 @@ WeeChat とプラグインが送信するシグナルのリスト:
   Pointer: バッファ |
   バッファをクリア
 
+// TRANSLATION MISSING
+| weechat | buffer_filters_enabled +
+  _(WeeChat バージョン 2.0 以上で利用可)_ |
+  Pointer: バッファ |
+  Filters enabled in buffer.
+
+// TRANSLATION MISSING
+| weechat | buffer_filters_disabled +
+  _(WeeChat バージョン 2.0 以上で利用可)_ |
+  Pointer: バッファ |
+  Filters disabled in buffer.
+
 | weechat | buffer_hidden |
   Pointer: バッファ |
   バッファを隠す

src/core/wee-command.c

@@ -2110,6 +2110,9 @@ COMMAND_CALLBACK(filter)
                 {
                     buffer->filter = 1;
                     gui_filter_buffer (buffer, NULL);
+                    (void) hook_signal_send (
+                        "buffer_filters_enabled",
+                        WEECHAT_HOOK_SIGNAL_POINTER, buffer);
                 }
             }
             else
@@ -2165,6 +2168,9 @@ COMMAND_CALLBACK(filter)
                 {
                     buffer->filter = 0;
                     gui_filter_buffer (buffer, NULL);
+                    (void) hook_signal_send (
+                        "buffer_filters_disabled",
+                        WEECHAT_HOOK_SIGNAL_POINTER, buffer);
                 }
             }
             else
@@ -2218,6 +2224,10 @@ COMMAND_CALLBACK(filter)
                 /* toggle filters in buffer */
                 buffer->filter ^= 1;
                 gui_filter_buffer (buffer, NULL);
+                (void) hook_signal_send (
+                    (buffer->filter) ?
+                    "buffer_filters_enabled" : "buffer_filters_disabled",
+                    WEECHAT_HOOK_SIGNAL_POINTER, buffer);
             }
             else
             {