lnav/src/grapher.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.
 *
 * @file grapher.hh
 */

#ifndef _grapher_hh
#define _grapher_hh

#include "config.h"

#include <string>
#include <vector>

#include "grep_proc.hh"
#include "hist_source.hh"
#include "textview_curses.hh"

class grapher
    : public grep_proc_sink,
      public hist_source {
public:

    grapher()
        : gr_highlighter(NULL)
    {
        this->set_label_source(&this->gr_label_source);
    };

    grep_line_t at(int row) { return this->gr_lines[row]; };

    void set_highlighter(textview_curses::highlighter *hl)
    {
        this->gr_highlighter = hl;
    };

    void grep_begin(grep_proc &gp)
    {
        this->clear();
        this->hs_type2role.clear();
        this->gr_lines.clear();
        this->gr_x          = -1;
        this->gr_next_field = bucket_type_t(0);
    };

    void grep_match(grep_proc &gp, grep_line_t line, int start, int end) { };

    void grep_capture(grep_proc &gp,
                      grep_line_t line,
                      int start,
                      int end,
                      char *capture)
    {
        float amount = 1.0;

        if (this->gr_lines.empty() || this->gr_lines.back() != line) {
            this->gr_next_field = bucket_type_t(0);
            this->gr_x         += 1;
            this->gr_lines.push_back(line);
        }

        if (this->gr_highlighter != NULL) {
            if (this->hs_type2role.find(this->gr_next_field) ==
                this->hs_type2role.end()) {
                this->hs_type2role[this->gr_next_field] =
                    this->gr_highlighter->get_role(this->gr_next_field);
            }
        }
        if (capture != 0) {
            sscanf(capture, "%f", &amount);
        }
        this->add_value(this->gr_x, this->gr_next_field, amount);

        ++this->gr_next_field;
    };

    void grep_end_batch(grep_proc &gp) {  };
    void grep_end(grep_proc &gp) {  };

private:

    class label_source
        : public hist_source::label_source {
public:
        label_source() { };

        void hist_label_for_bucket(int bucket_start_value,
                                   const hist_source::bucket_t &bucket,
                                   std::string &label_out)
        {
            hist_source::bucket_t::const_iterator iter;

            for (iter = bucket.begin(); iter != bucket.end(); iter++) {
                char buffer[64];

                if (iter->second != 0.0) {
                    snprintf(buffer, sizeof(buffer), "  %10.2f", iter->second);
                }
                else {
                    snprintf(buffer, sizeof(buffer), "  %10s", "-");
                }
                label_out += std::string(buffer);
            }
        };
    };

    label_source gr_label_source;
    textview_curses::highlighter *gr_highlighter;
    std::vector<grep_line_t>      gr_lines;
    int           gr_x;
    bucket_type_t gr_next_field;
};
#endif