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196 lines
6.7 KiB
C++
196 lines
6.7 KiB
C++
/**
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* Copyright (c) 2013, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file ansi_scrubber.cc
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*/
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#include <algorithm>
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#include "ansi_scrubber.hh"
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#include "base/opt_util.hh"
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#include "config.h"
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#include "pcrepp/pcrepp.hh"
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#include "view_curses.hh"
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using namespace std;
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static pcrepp&
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ansi_regex()
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{
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static pcrepp retval("\x1b\\[([\\d=;\\?]*)([a-zA-Z])");
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return retval;
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}
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void
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scrub_ansi_string(std::string& str, string_attrs_t& sa)
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{
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pcre_context_static<60> context;
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pcrepp& regex = ansi_regex();
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pcre_input pi(str);
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replace(str.begin(), str.end(), '\0', ' ');
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while (regex.match(context, pi)) {
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pcre_context::capture_t* caps = context.all();
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struct line_range lr;
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bool has_attrs = false;
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attr_t attrs = 0;
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auto bg = nonstd::optional<int>();
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auto fg = nonstd::optional<int>();
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auto role = nonstd::optional<int>();
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size_t lpc;
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switch (pi.get_substr_start(&caps[2])[0]) {
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case 'm':
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for (lpc = caps[1].c_begin;
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lpc != string::npos && lpc < (size_t) caps[1].c_end;)
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{
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int ansi_code = 0;
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if (sscanf(&(str[lpc]), "%d", &ansi_code) == 1) {
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if (90 <= ansi_code && ansi_code <= 97) {
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ansi_code -= 60;
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attrs |= A_STANDOUT;
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}
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if (30 <= ansi_code && ansi_code <= 37) {
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fg = ansi_code - 30;
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}
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if (40 <= ansi_code && ansi_code <= 47) {
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bg = ansi_code - 40;
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}
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switch (ansi_code) {
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case 1:
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attrs |= A_BOLD;
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break;
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case 2:
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attrs |= A_DIM;
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break;
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case 4:
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attrs |= A_UNDERLINE;
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break;
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case 7:
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attrs |= A_REVERSE;
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break;
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}
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}
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lpc = str.find(';', lpc);
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if (lpc != string::npos) {
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lpc += 1;
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}
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}
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has_attrs = true;
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break;
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case 'C': {
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unsigned int spaces = 0;
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if (sscanf(&(str[caps[1].c_begin]), "%u", &spaces) == 1
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&& spaces > 0) {
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str.insert(
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(std::string::size_type) caps[0].c_end, spaces, ' ');
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}
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break;
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}
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case 'H': {
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unsigned int row = 0, spaces = 0;
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if (sscanf(&(str[caps[1].c_begin]), "%u;%u", &row, &spaces) == 2
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&& spaces > 1) {
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int ispaces = spaces - 1;
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if (ispaces > caps[0].c_begin) {
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str.insert((unsigned long) caps[0].c_end,
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ispaces - caps[0].c_begin,
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' ');
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}
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}
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break;
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}
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case 'O': {
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int role_int;
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if (sscanf(&(str[caps[1].c_begin]), "%d", &role_int) == 1) {
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if (role_int >= 0 && role_int < view_colors::VCR__MAX) {
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role = role_int;
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has_attrs = true;
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}
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}
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break;
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}
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}
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str.erase(str.begin() + caps[0].c_begin, str.begin() + caps[0].c_end);
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if (has_attrs) {
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for (auto rit = sa.rbegin(); rit != sa.rend(); rit++) {
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if (rit->sa_range.lr_end != -1) {
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break;
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}
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rit->sa_range.lr_end = caps[0].c_begin;
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}
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lr.lr_start = caps[0].c_begin;
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lr.lr_end = -1;
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if (attrs) {
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sa.emplace_back(lr, &view_curses::VC_STYLE, attrs);
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}
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role | [&lr, &sa](int r) {
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sa.emplace_back(lr, &view_curses::VC_ROLE, r);
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};
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fg | [&lr, &sa](int color) {
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sa.emplace_back(lr, &view_curses::VC_FOREGROUND, color);
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};
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bg | [&lr, &sa](int color) {
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sa.emplace_back(lr, &view_curses::VC_BACKGROUND, color);
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};
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}
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pi.reset(str);
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}
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}
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void
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add_ansi_vars(std::map<std::string, std::string>& vars)
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{
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vars["ansi_csi"] = ANSI_CSI;
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vars["ansi_norm"] = ANSI_NORM;
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vars["ansi_bold"] = ANSI_BOLD_START;
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vars["ansi_underline"] = ANSI_UNDERLINE_START;
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vars["ansi_black"] = ANSI_COLOR(COLOR_BLACK);
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vars["ansi_red"] = ANSI_COLOR(COLOR_RED);
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vars["ansi_green"] = ANSI_COLOR(COLOR_GREEN);
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vars["ansi_yellow"] = ANSI_COLOR(COLOR_YELLOW);
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vars["ansi_blue"] = ANSI_COLOR(COLOR_BLUE);
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vars["ansi_magenta"] = ANSI_COLOR(COLOR_MAGENTA);
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vars["ansi_cyan"] = ANSI_COLOR(COLOR_CYAN);
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vars["ansi_white"] = ANSI_COLOR(COLOR_WHITE);
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}
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