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/***************************************************************************
* Copyright (C) 2017 by Hans-Peter Deifel *
* hpd@hpdeifel.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
* Boston, MA 02110-1301 USA. *
***************************************************************************/
#include "output.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <iostream>
using namespace std;
static bool is_valid_color(const char* colorcode) {
return colorcode && strcmp(colorcode, "");
}
static void start_color(bool use_colors, const char *colorcode)
{
if (use_colors && is_valid_color(colorcode))
cout << "\33[" << colorcode << "m\33[K";
}
static void end_color(bool use_colors, const char *colorcode)
{
if (use_colors && is_valid_color(colorcode))
cout << "\33[m\33[K";
}
#define with_color(use_colors, color, code) \
do { \
start_color(use_colors, color); \
{ \
code; \
} \
end_color(use_colors, color); \
} while (0);
static void putsn(const string &str, int from, int to)
{
for (; from < to; from++)
cout << (str[from]);
}
void print_only_match(const struct context &context, const struct match &match)
{
line_prefix(context.out, context.filename, false, context.pagenum);
with_color(context.out.color, context.out.colors.highlight,
putsn(match.string, match.start, match.end);
);
cout << endl;
}
ostream& err() {
return cerr << "pdfgrep: ";
}
std::ostream& line_prefix(const Outconf& outconf, const std::string& filename,
bool in_context, size_t page) {
line_prefix(outconf, filename, in_context);
if (outconf.pagenum) {
with_color(outconf.color, outconf.colors.pagenum,
cout << page;);
with_color(outconf.color, outconf.colors.separator,
cout << (in_context ? "-" : outconf.prefix_sep););
}
return cout;
}
std::ostream& line_prefix(const Outconf& outconf, const std::string& filename,
bool in_context) {
if (outconf.filename) {
with_color(outconf.color, outconf.colors.filename,
cout << filename;);
// Here, --null takes precedence over --match-prefix-separator
// in the sense, that if --null is given, the null byte is
// always printed after the filename instead of the separator.
if (outconf.null_byte_sep) {
cout << '\0';
} else {
with_color(outconf.color, outconf.colors.separator,
cout << (in_context ? "-" : outconf.prefix_sep ););
}
}
return cout;
}
// Invariant: matches can't be empty
void print_matches(const context& context, const std::vector<match>& matches) {
const match& first_match = matches.front();
const match& last_match = matches.back();
auto str = first_match.string;
auto a = str.rfind('\n', first_match.start);
auto b = str.find('\n', last_match.end);
// If a == -1, a gets 0 (beginning of string) and if it's a valid index
// to a newline, it now points to the character after that.
a++;
if (b == string::npos)
b = str.size();
line_prefix(context.out, context.filename, false, context.pagenum);
int previous_end = a;
for (auto match : matches) {
putsn(str, previous_end, match.start);
with_color(context.out.color, context.out.colors.highlight,
putsn(str, match.start, match.end);
);
previous_end = match.end;
}
putsn(str, previous_end, b);
cout << endl;
}
void print_context_before(const context& context, const match& match, int lines) {
if (!context.out.context_mode)
return;
if (lines < 0)
lines = context.out.context_before;
auto str = match.string;
auto line_begin = str.rfind('\n', match.start);
// we are at the first line
if (line_begin == string::npos)
return;
vector<string> lines_to_output;
auto pos = line_begin;
while (lines --> 0) {
if (pos == 0) {
lines_to_output.push_back("");
break;
}
auto newpos = str.rfind('\n', pos-1);
auto start_pos = newpos == string::npos ? 0 : newpos + 1;
lines_to_output.push_back(str.substr(start_pos, pos-start_pos));
if (newpos == string::npos)
break;
else
pos = newpos;
}
for (auto l = lines_to_output.rbegin(); l != lines_to_output.rend(); ++l) {
line_prefix(context.out, context.filename, true, context.pagenum) << *l << endl;
}
}
void print_context_after(const context& context, const match& match, int lines) {
if (!context.out.context_mode)
return;
if (lines < 0)
lines = context.out.context_after;
auto str = match.string;
auto line_end = str.find('\n', match.end);
// we are at the first line
if (line_end == string::npos)
return;
auto pos = line_end;
while (lines --> 0) {
if (pos == str.size()-1) {
break;
}
auto newpos = str.find('\n', pos+1);
auto end_pos = newpos == string::npos ? str.size() : newpos;
line_prefix(context.out, context.filename, true, context.pagenum)
<< str.substr(pos+1, end_pos-pos-1) << endl;
if (newpos == string::npos)
break;
else
pos = newpos;
}
}
void print_context_between(const context& context, const match& match1, const match& match2) {
if (!context.out.context_mode) {
return;
}
auto str = match1.string;
auto pos_right = str.find('\n', match1.end);
auto pos_left = str.rfind('\n', match2.start);
// count the lines that we have to the right of match1
int lines_right = 0;
while (pos_right != string::npos && lines_right < context.out.context_after
&& pos_right < pos_left) {
lines_right++;
pos_right = str.find('\n', pos_right+1);
}
// count the lines that we have to the left of match2
int lines_left = 0;
while (pos_left != string::npos && lines_left < context.out.context_before
&& pos_left > pos_right) {
lines_left++;
if (pos_left == 0) {
pos_left = string::npos;
break;
}
pos_left = str.rfind('\n', pos_left-1);
}
print_context_after(context, match1, lines_right);
if (pos_left > pos_right)
print_context_separator(context.out);
print_context_before(context, match2, lines_left);
}
void print_context_separator(const Outconf &out) {
// TODO Add color here
if (out.context_mode)
cout << "--" << endl;
}
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