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 <string>
#include <vector>

#include "listview_curses.hh"
#include "hist_source.hh"
#include "log_vtab_impl.hh"

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

    ~db_label_source() { };

    void hist_label_for_group(int group, std::string &label_out) {
	label_out.clear();
    };
    
    void hist_label_for_bucket(int bucket_start_value,
			       const hist_source::bucket_t &bucket,
			       std::string &label_out) {
	/*
	 * start_value is the result rowid, each bucket type is a column value
	 * label_out should be the raw text output.
	 */

	label_out.clear();
	if (bucket_start_value >= (int)this->dls_rows.size())
	    return;
	for (int lpc = 0; lpc < (int)this->dls_rows[bucket_start_value].size(); lpc++) {
	    int padding = (this->dls_column_sizes[lpc] -
	                   this->dls_rows[bucket_start_value][lpc].length() -
	                   1);

	    if (this->dls_column_types[lpc] != SQLITE3_TEXT) {
	    	label_out.append(padding, ' ');
	    }
	    label_out.append(this->dls_rows[bucket_start_value][lpc]);
	    if (this->dls_column_types[lpc] == SQLITE3_TEXT) {
	    	label_out.append(padding, ' ');
	    }
	    label_out.append(1, ' ');
	}
    };

    void hist_attrs_for_bucket(int bucket_start_value,
			       const hist_source::bucket_t &bucket,
			       string_attrs_t &sa) {
    	struct line_range lr = { 0, 0 };
    	struct line_range lr2 = { 0, -1 };

	if (bucket_start_value >= (int)this->dls_rows.size())
	    return;
    	for (size_t lpc = 0; lpc < this->dls_column_sizes.size() - 1; lpc++) {
    		if (bucket_start_value % 2 == 0) {
                        sa[lr2].insert(make_string_attr("style", A_BOLD));
    		}
    		lr.lr_start += this->dls_column_sizes[lpc] - 1;
    		lr.lr_end = lr.lr_start + 1;
    		sa[lr].insert(make_string_attr("graphic", ACS_VLINE));
    		lr.lr_start += 1;
    	}
    }

    // TODO: add support for left and right justification... numbers should
    // be right justified and strings should be left.
    void push_column(const char *colstr) {
	int index = this->dls_rows.back().size();
	
	this->dls_rows.back().push_back(colstr);
	if (this->dls_rows.back().size() > this->dls_column_sizes.size()) {
	    this->dls_column_sizes.push_back(1);
	}
	this->dls_column_sizes[index] =
	    std::max(this->dls_column_sizes[index], strlen(colstr) + 1);
    };
    
    void push_header(const std::string &colstr, int type, bool graphable) {
	int index = this->dls_headers.size();
	
	this->dls_headers.push_back(colstr);
	if (this->dls_headers.size() > this->dls_column_sizes.size()) {
	    this->dls_column_sizes.push_back(1);
	}
	this->dls_column_sizes[index] =
	    std::max(this->dls_column_sizes[index], colstr.length() + 1);
	this->dls_column_types.push_back(type);
	this->dls_headers_to_graph.push_back(graphable);
    }

    void clear(void) {
        this->dls_headers.clear();
        this->dls_headers_to_graph.clear();
        this->dls_column_types.clear();
        this->dls_rows.clear();
        this->dls_column_sizes.clear();
    }

    std::vector< std::string > dls_headers;
    std::vector< bool > dls_headers_to_graph;
    std::vector<int> dls_column_types;
    std::vector< std::vector< std::string > > dls_rows;
    std::vector< size_t > dls_column_sizes;
};

class db_overlay_source : public list_overlay_source {
public:
	db_overlay_source() : dos_labels(NULL) { };

	size_t list_overlay_count(const listview_curses &lv) {
		return 1;
	};

	bool list_value_for_overlay(const listview_curses &lv,
	                            vis_line_t y,
	                            attr_line_t &value_out) {
                view_colors &vc = view_colors::singleton();
		if (y != 0) {
			return false;
		}

		std::string &line = value_out.get_string();
		db_label_source *dls = this->dos_labels;

		for (size_t lpc = 0;
		     lpc < this->dos_labels->dls_column_sizes.size();
		     lpc++) {
			int before, total_fill =
		            dls->dls_column_sizes[lpc] - dls->dls_headers[lpc].length();

                        struct line_range header_range = { line.length(), line.length() + dls->dls_column_sizes[lpc] };

                        int attrs = vc.attrs_for_role(this->dos_hist_source->get_role_for_type(bucket_type_t(lpc))) | A_UNDERLINE;
                        if (!this->dos_labels->dls_headers_to_graph[lpc]) {
                                attrs = A_UNDERLINE;
                        }
                        value_out.get_attrs()[header_range].insert(make_string_attr("style", attrs));

		        before = total_fill / 2;
		        total_fill -= before;
			line.append(before, ' ');
			line.append(dls->dls_headers[lpc]);
			line.append(total_fill, ' ');
		}

		struct line_range lr = { 0, -1 };

		value_out.get_attrs()[lr].insert(make_string_attr("style", A_BOLD | A_UNDERLINE));

		return true;
	};

	db_label_source *dos_labels;
        hist_source *dos_hist_source;
};

#endif