lnav/src/db_sub_source.hh

/**
 * Copyright (c) 2007-2012, 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 db_sub_source_hh
#define db_sub_source_hh

#include <iterator>
#include <string>
#include <vector>

#include <sqlite3.h>

#include "ArenaAlloc/arenaalloc.h"
#include "hist_source.hh"
#include "shlex.resolver.hh"
#include "textview_curses.hh"

class db_label_source
    : public text_sub_source
    , public text_time_translator {
public:
    ~db_label_source() override { this->clear(); }

    bool has_log_time_column() const { return !this->dls_time_column.empty(); }

    size_t text_line_count() override { return this->dls_rows.size(); }

    size_t text_size_for_line(textview_curses& tc,
                              int line,
                              line_flags_t flags) override
    {
        return this->text_line_width(tc);
    }

    size_t text_line_width(textview_curses& curses) override
    {
        size_t retval = 0;

        for (auto& dls_header : this->dls_headers) {
            retval += dls_header.hm_column_size + 1;
        }
        return retval;
    }

    void text_value_for_line(textview_curses& tc,
                             int row,
                             std::string& label_out,
                             line_flags_t flags) override;

    void text_attrs_for_line(textview_curses& tc,
                             int row,
                             string_attrs_t& sa) override;

    void push_header(const std::string& colstr, int type, bool graphable);

    void push_column(const scoped_value_t& sv);

    void clear();

    nonstd::optional<size_t> column_name_to_index(
        const std::string& name) const;

    nonstd::optional<vis_line_t> row_for_time(
        struct timeval time_bucket) override;

    nonstd::optional<struct timeval> time_for_row(vis_line_t row) override
    {
        if ((row < 0_vl) || (((size_t) row) >= this->dls_time_column.size())) {
            return nonstd::nullopt;
        }

        return this->dls_time_column[row];
    }

    struct header_meta {
        explicit header_meta(std::string name) : hm_name(std::move(name)) {}

        bool operator==(const std::string& name) const
        {
            return this->hm_name == name;
        }

        std::string hm_name;
        int hm_column_type{SQLITE3_TEXT};
        unsigned int hm_sub_type{0};
        bool hm_graphable{false};
        size_t hm_column_size{0};
        text_attrs hm_title_attrs;
    };

    stacked_bar_chart<std::string> dls_chart;
    std::vector<header_meta> dls_headers;
    std::vector<std::vector<const char*>> dls_rows;
    std::vector<struct timeval> dls_time_column;
    std::vector<size_t> dls_cell_width;
    int dls_time_column_index{-1};
    nonstd::optional<size_t> dls_time_column_invalidated_at;
    std::unique_ptr<ArenaAlloc::Alloc<char>> dls_allocator{
        std::make_unique<ArenaAlloc::Alloc<char>>(64 * 1024)};

    static const char NULL_STR[];
};

class db_overlay_source : public list_overlay_source {
public:
    size_t list_overlay_count(const listview_curses& lv);

    bool list_value_for_overlay(const listview_curses& lv,
                                int y,
                                int bottom,
                                vis_line_t row,
                                attr_line_t& value_out) override;

    bool dos_active{false};
    db_label_source* dos_labels{nullptr};
    std::vector<attr_line_t> dos_lines;
};
#endif