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diff --git a/src/plain_text_source.hh b/src/plain_text_source.hh
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+/**
+ * Copyright (c) 2015, 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_PLAIN_TEXT_SOURCE_HH
+#define LNAV_PLAIN_TEXT_SOURCE_HH
+
+#include <string>
+#include <vector>
+
+#include "base/attr_line.hh"
+#include "base/file_range.hh"
+#include "document.sections.hh"
+#include "textview_curses.hh"
+
+class plain_text_source
+    : public text_sub_source
+    , public vis_location_history
+    , public text_anchors {
+public:
+    struct text_line {
+        text_line(file_off_t off, attr_line_t value)
+            : tl_offset(off), tl_value(std::move(value))
+        {
+        }
+
+        bool contains_offset(file_off_t off) const
+        {
+            return (this->tl_offset <= off
+                    && off < this->tl_offset + this->tl_value.length());
+        }
+
+        file_off_t tl_offset;
+        attr_line_t tl_value;
+    };
+
+    plain_text_source() = default;
+
+    plain_text_source(const std::string& text);
+
+    plain_text_source(const std::vector<std::string>& text_lines);
+
+    plain_text_source(const std::vector<attr_line_t>& text_lines);
+
+    plain_text_source& set_reverse_selection(bool val)
+    {
+        this->tds_reverse_selection = val;
+        return *this;
+    }
+
+    plain_text_source& replace_with(const attr_line_t& text_lines);
+
+    plain_text_source& replace_with(const std::vector<std::string>& text_lines);
+
+    void clear();
+
+    plain_text_source& truncate_to(size_t max_lines);
+
+    size_t text_line_count() override { return this->tds_lines.size(); }
+
+    bool empty() const { return this->tds_lines.empty(); }
+
+    size_t text_line_width(textview_curses& curses) override;
+
+    void text_value_for_line(textview_curses& tc,
+                             int row,
+                             std::string& value_out,
+                             line_flags_t flags) override;
+
+    void text_attrs_for_line(textview_curses& tc,
+                             int line,
+                             string_attrs_t& value_out) override;
+
+    size_t text_size_for_line(textview_curses& tc,
+                              int row,
+                              line_flags_t flags) override;
+
+    text_format_t get_text_format() const override;
+
+    const std::vector<text_line>& get_lines() const { return this->tds_lines; }
+
+    plain_text_source& set_text_format(text_format_t format)
+    {
+        this->tds_text_format = format;
+        return *this;
+    }
+
+    nonstd::optional<location_history*> get_location_history() override
+    {
+        return this;
+    }
+
+    void text_crumbs_for_line(int line,
+                              std::vector<breadcrumb::crumb>& crumbs) override;
+
+    nonstd::optional<vis_line_t> row_for_anchor(const std::string& id) override;
+    nonstd::optional<std::string> anchor_for_row(vis_line_t vl) override;
+    std::unordered_set<std::string> get_anchors() override;
+
+protected:
+    size_t compute_longest_line();
+
+    nonstd::optional<vis_line_t> line_for_offset(file_off_t off) const;
+
+    std::vector<text_line> tds_lines;
+    text_format_t tds_text_format{text_format_t::TF_UNKNOWN};
+    size_t tds_longest_line{0};
+    bool tds_reverse_selection{false};
+    lnav::document::metadata tds_doc_sections;
+};
+
+#endif  // LNAV_PLAIN_TEXT_SOURCE_HH