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diff --git a/src/filter_status_source.hh b/src/filter_status_source.hh
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+/**
+ * Copyright (c) 2018, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef lnav_filter_status_source_hh
+#define lnav_filter_status_source_hh
+
+#include <string>
+
+#include "statusview_curses.hh"
+#include "textview_curses.hh"
+
+class filter_status_source : public status_data_source {
+public:
+    typedef enum {
+        TSF_FILES_TITLE,
+        TSF_FILES_RIGHT_STITCH,
+        TSF_TITLE,
+        TSF_STITCH_TITLE,
+        TSF_COUNT,
+        TSF_FILTERED,
+        TSF_HELP,
+
+        TSF__MAX
+    } field_t;
+
+    filter_status_source();
+
+    size_t statusview_fields() override;
+
+    status_field& statusview_value_for_field(int field) override;
+
+    void update_filtered(text_sub_source* tss);
+
+private:
+    status_field tss_fields[TSF__MAX];
+    status_field tss_error;
+    int bss_last_filtered_count{0};
+    sig_atomic_t bss_filter_counter{0};
+};
+
+class filter_help_status_source : public status_data_source {
+public:
+    filter_help_status_source();
+
+    size_t statusview_fields() override;
+
+    status_field& statusview_value_for_field(int field) override;
+
+    status_field fss_prompt{1024, role_t::VCR_STATUS};
+    status_field fss_error{1024, role_t::VCR_ALERT_STATUS};
+
+private:
+    status_field fss_help;
+};
+
+#endif