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486 lines
15 KiB
C++
486 lines
15 KiB
C++
/**
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* Copyright (c) 2014, 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 ON
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* 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 readline_highlighters.cc
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*/
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#include "config.h"
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#include "pcrepp.hh"
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#include "sql_util.hh"
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#include "readline_highlighters.hh"
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using namespace std;
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static bool check_re_prev(const string &line, int x)
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{
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bool retval = false;
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if ((x > 0 &&
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line[x - 1] != ')' &&
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line[x - 1] != ']' &&
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line[x - 1] != '*' &&
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line[x - 1] != '?' &&
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line[x - 1] != '+') &&
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(x < 2 || line[x - 2] != '\\')) {
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retval = true;
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}
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return retval;
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}
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static bool is_bracket(const string &str, int index, bool is_lit)
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{
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if (is_lit && str[index - 1] == '\\') {
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return true;
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}
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if (!is_lit && str[index - 1] != '\\') {
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return true;
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}
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return false;
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}
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static void find_matching_bracket(attr_line_t &al, int x, char left, char right)
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{
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static int matching_bracket_attrs = (
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A_BOLD|A_REVERSE|view_colors::ansi_color_pair(COLOR_GREEN, COLOR_BLACK));
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static int missing_bracket_attrs = (
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A_BOLD|A_REVERSE|view_colors::ansi_color_pair(COLOR_RED, COLOR_BLACK));
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bool is_lit = (left == 'Q');
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const string &line = al.get_string();
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int depth = 0;
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if (line[x] == right && is_bracket(line, x, is_lit)) {
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for (int lpc = x - 1; lpc > 0; lpc--) {
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if (line[lpc] == right && is_bracket(line, lpc, is_lit)) {
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depth += 1;
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}
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else if (line[lpc] == left && is_bracket(line, lpc, is_lit)) {
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if (depth == 0) {
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al.get_attrs().push_back(string_attr(
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line_range(lpc, lpc + 1),
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&view_curses::VC_STYLE,
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matching_bracket_attrs));
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break;
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}
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else {
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depth -= 1;
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}
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}
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}
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}
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if (line[x] == left && is_bracket(line, x, is_lit)) {
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for (int lpc = x + 1; lpc < line.length(); lpc++) {
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if (line[lpc] == left && is_bracket(line, lpc, is_lit)) {
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depth += 1;
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}
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else if (line[lpc] == right && is_bracket(line, lpc, is_lit)) {
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if (depth == 0) {
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al.get_attrs().push_back(string_attr(
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line_range(lpc, lpc + 1),
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&view_curses::VC_STYLE,
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matching_bracket_attrs));
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break;
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}
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else {
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depth -= 1;
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}
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}
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}
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}
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int first_left = -1;
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depth = 0;
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for (int lpc = 1; lpc < line.length(); lpc++) {
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if (line[lpc] == left && is_bracket(line, lpc, is_lit)) {
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depth += 1;
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if (first_left == -1) {
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first_left = lpc;
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}
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}
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else if (line[lpc] == right && is_bracket(line, lpc, is_lit)) {
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if (depth > 0) {
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depth -= 1;
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}
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else {
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al.get_attrs().push_back(string_attr(
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line_range(is_lit ? lpc - 1 : lpc, lpc + 1),
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&view_curses::VC_STYLE,
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missing_bracket_attrs));
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}
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}
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}
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if (depth > 0) {
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al.get_attrs().push_back(string_attr(
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line_range(is_lit ? first_left - 1 : first_left, first_left + 1),
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&view_curses::VC_STYLE,
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missing_bracket_attrs));
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}
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}
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static char safe_read(const string &str, string::size_type index)
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{
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if (index < str.length()) {
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return str.at(index);
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}
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return 0;
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}
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static void readline_regex_highlighter_int(attr_line_t &al, int x, int skip)
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{
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static int special_char = (
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A_BOLD|view_colors::ansi_color_pair(COLOR_CYAN, COLOR_BLACK));
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static int class_attrs = (
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A_BOLD|view_colors::ansi_color_pair(COLOR_MAGENTA, COLOR_BLACK));
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static int repeated_char_attrs = (
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view_colors::ansi_color_pair(COLOR_YELLOW, COLOR_BLACK));
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static int bracket_attrs = (
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view_colors::ansi_color_pair(COLOR_GREEN, COLOR_BLACK));
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static int error_attrs = (
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A_BOLD|A_REVERSE|view_colors::ansi_color_pair(COLOR_RED, COLOR_BLACK));
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static const char *brackets[] = {
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"[]",
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"{}",
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"()",
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"QE",
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NULL
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};
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string &line = al.get_string();
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bool backslash_is_quoted = false;
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for (int lpc = skip; lpc < line.length(); lpc++) {
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if (line[lpc - 1] != '\\') {
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switch (line[lpc]) {
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case '^':
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case '$':
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case '*':
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case '+':
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case '|':
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case '.':
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al.get_attrs().push_back(string_attr(
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line_range(lpc, lpc + 1),
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&view_curses::VC_STYLE,
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special_char));
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if ((line[lpc] == '*' || line[lpc] == '+') &&
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check_re_prev(line, lpc)) {
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al.get_attrs().push_back(string_attr(
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line_range(lpc - 1, lpc),
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&view_curses::VC_STYLE,
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repeated_char_attrs));
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}
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break;
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case '?': {
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struct line_range lr(lpc, lpc + 1);
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if (line[lpc - 1] == '(') {
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switch (line[lpc + 1]) {
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case ':':
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case '!':
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case '>':
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case '<':
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case '#':
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lr.lr_end += 1;
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break;
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}
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al.get_attrs().push_back(string_attr(
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lr,
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&view_curses::VC_STYLE,
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bracket_attrs));
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}
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else {
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al.get_attrs().push_back(string_attr(
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lr,
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&view_curses::VC_STYLE,
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special_char));
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if (check_re_prev(line, lpc)) {
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al.get_attrs().push_back(string_attr(
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line_range(lpc - 1, lpc),
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&view_curses::VC_STYLE,
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repeated_char_attrs));
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}
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}
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break;
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}
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case '(':
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case ')':
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case '{':
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case '}':
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case '[':
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case ']':
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al.get_attrs().push_back(string_attr(
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line_range(lpc, lpc + 1),
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&view_curses::VC_STYLE,
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bracket_attrs));
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break;
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}
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}
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if (line[lpc - 1] == '\\') {
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if (backslash_is_quoted) {
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backslash_is_quoted = false;
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continue;
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}
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switch (line[lpc]) {
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case '\\':
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backslash_is_quoted = true;
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al.with_attr(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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special_char));
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break;
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case 'd':
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case 'D':
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case 'h':
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case 'H':
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case 'N':
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case 'R':
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case 's':
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case 'S':
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case 'v':
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case 'V':
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case 'w':
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case 'W':
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case 'X':
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case 'A':
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case 'b':
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case 'B':
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case 'G':
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case 'Z':
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case 'z':
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al.get_attrs().push_back(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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class_attrs));
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break;
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case ' ':
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al.get_attrs().push_back(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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error_attrs));
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break;
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case '0':
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case 'x':
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if (safe_read(line, lpc + 1) == '{') {
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al.with_attr(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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special_char));
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}
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else if (isdigit(safe_read(line, lpc + 1)) &&
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isdigit(safe_read(line, lpc + 2))) {
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al.with_attr(string_attr(
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line_range(lpc - 1, lpc + 3),
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&view_curses::VC_STYLE,
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special_char));
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}
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else {
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al.with_attr(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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error_attrs));
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}
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break;
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case 'Q':
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case 'E':
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al.with_attr(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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bracket_attrs));
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break;
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default:
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if (isdigit(line[lpc])) {
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al.get_attrs().push_back(string_attr(
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line_range(lpc - 1, lpc + 1),
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&view_curses::VC_STYLE,
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special_char));
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}
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break;
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}
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}
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}
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for (int lpc = 0; brackets[lpc]; lpc++) {
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find_matching_bracket(al, x, brackets[lpc][0], brackets[lpc][1]);
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}
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}
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void readline_regex_highlighter(attr_line_t &al, int x)
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{
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readline_regex_highlighter_int(al, x, 1);
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}
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void readline_command_highlighter(attr_line_t &al, int x)
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{
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static const pcrepp PREFIXES("^:(filter-in|filter-out|highlight|graph)");
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static int keyword_attrs = (
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A_BOLD|view_colors::ansi_color_pair(COLOR_CYAN, COLOR_BLACK));
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const string &line = al.get_string();
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pcre_context_static<30> pc;
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pcre_input pi(line);
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size_t ws_index;
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ws_index = line.find(' ');
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if (ws_index != string::npos) {
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al.get_attrs().push_back(string_attr(
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line_range(1, ws_index),
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&view_curses::VC_STYLE,
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keyword_attrs));
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}
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if (PREFIXES.match(pc, pi)) {
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readline_regex_highlighter_int(al, x, 1 + pc[0]->length());
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}
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}
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static string sql_keyword_re(void)
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{
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string retval = "(?:";
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for (int lpc = 0; sql_keywords[lpc]; lpc++) {
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if (lpc > 0) {
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retval.append("|");
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}
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retval.append("\\b");
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retval.append(sql_keywords[lpc]);
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retval.append("\\b");
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}
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retval += ")";
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return retval;
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}
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void readline_sqlite_highlighter(attr_line_t &al, int x)
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{
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static int keyword_attrs = (
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A_BOLD|view_colors::ansi_color_pair(COLOR_CYAN, COLOR_BLACK));
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static int symbol_attrs = (
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view_colors::ansi_color_pair(COLOR_MAGENTA, COLOR_BLACK));
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static int string_attrs = (
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view_colors::ansi_color_pair(COLOR_GREEN, COLOR_BLACK));
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static int error_attrs = (
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A_BOLD|A_REVERSE|view_colors::ansi_color_pair(COLOR_RED, COLOR_BLACK));
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static string keyword_re_str = sql_keyword_re() + "|\\.schema";
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static pcrepp keyword_pcre(keyword_re_str.c_str(), PCRE_CASELESS);
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static pcrepp string_literal_pcre("'[^']*('(?:'[^']*')*|$)");
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static pcrepp ident_pcre("(\\$?\\b[a-z_]\\w*)|\"([^\"]+)\"|\\[([^\\]]+)]", PCRE_CASELESS);
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static const char *brackets[] = {
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"[]",
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"()",
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NULL
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};
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view_colors &vc = view_colors::singleton();
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pcre_context_static<30> pc;
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pcre_input pi(al.get_string());
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string &line = al.get_string();
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while (ident_pcre.match(pc, pi)) {
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pcre_context::capture_t *cap = pc.first_valid();
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int attrs = vc.attrs_for_ident(pi.get_substr_start(cap), cap->length());
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struct line_range lr(cap->c_begin, cap->c_end);
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if (line[cap->c_end] == '(') {
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}
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else if (!lr.contains(x) && !lr.contains(x - 1)) {
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al.get_attrs().push_back(string_attr(
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lr, &view_curses::VC_STYLE, attrs));
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}
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}
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pi.reset(line);
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while (keyword_pcre.match(pc, pi)) {
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pcre_context::capture_t *cap = pc.all();
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al.get_attrs().push_back(string_attr(
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line_range(cap->c_begin, cap->c_end),
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&view_curses::VC_STYLE,
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keyword_attrs));
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}
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for (int lpc = 0; lpc < line.length(); lpc++) {
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switch (line[lpc]) {
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case '*':
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case '<':
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case '>':
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case '=':
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case '!':
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case '-':
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case '+':
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al.get_attrs().push_back(string_attr(
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line_range(lpc, lpc + 1),
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&view_curses::VC_STYLE,
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symbol_attrs));
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break;
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}
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}
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pi.reset(line);
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while (string_literal_pcre.match(pc, pi)) {
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pcre_context::capture_t *cap = pc.all();
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struct line_range lr(cap->c_begin, cap->c_end);
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string_attrs_t &sa = al.get_attrs();
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remove_string_attr(sa, lr);
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if (line[cap->c_end - 1] != '\'') {
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sa.push_back(string_attr(
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line_range(cap->c_begin, cap->c_begin + 1),
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&view_curses::VC_STYLE,
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error_attrs));
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lr.lr_start += 1;
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}
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sa.push_back(string_attr(
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lr,
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&view_curses::VC_STYLE,
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string_attrs));
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}
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for (int lpc = 0; brackets[lpc]; lpc++) {
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find_matching_bracket(al, x, brackets[lpc][0], brackets[lpc][1]);
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}
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}
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