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Diffstat (limited to 'src/editor/syntax.c')
| -rw-r--r-- | src/editor/syntax.c | 1606 |
1 files changed, 1606 insertions, 0 deletions
diff --git a/src/editor/syntax.c b/src/editor/syntax.c new file mode 100644 index 0000000..f95ad2b --- /dev/null +++ b/src/editor/syntax.c @@ -0,0 +1,1606 @@ +/* + Editor syntax highlighting. + + Copyright (C) 1996-2023 + Free Software Foundation, Inc. + + Written by: + Paul Sheer, 1998 + Leonard den Ottolander <leonard den ottolander nl>, 2005, 2006 + Egmont Koblinger <egmont@gmail.com>, 2010 + Slava Zanko <slavazanko@gmail.com>, 2013 + Andrew Borodin <aborodin@vmail.ru>, 2013, 2014, 2021 + + This file is part of the Midnight Commander. + + The Midnight Commander 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 3 of the License, + or (at your option) any later version. + + The Midnight Commander 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, see <http://www.gnu.org/licenses/>. + */ + +/** \file + * \brief Source: editor syntax highlighting + * \author Paul Sheer + * \date 1996, 1997 + * \author Mikhail Pobolovets + * \date 2010 + * + * Misspelled words are flushed from the syntax highlighting rules + * when they have been around longer than + * TRANSIENT_WORD_TIME_OUT seconds. At a cursor rate of 30 + * chars per second and say 3 chars + a space per word, we can + * accumulate 450 words absolute max with a value of 60. This is + * below this limit of 1024 words in a context. + */ + +#include <config.h> + +#include <stdio.h> +#include <stdarg.h> +#include <sys/types.h> +#include <unistd.h> +#include <string.h> +#include <ctype.h> +#include <errno.h> +#include <sys/stat.h> +#include <stdlib.h> + +#include "lib/global.h" +#include "lib/search.h" /* search engine */ +#include "lib/skin.h" +#include "lib/fileloc.h" /* EDIT_SYNTAX_DIR, EDIT_SYNTAX_FILE */ +#include "lib/strutil.h" /* utf string functions */ +#include "lib/util.h" +#include "lib/widget.h" /* Listbox, message() */ + +#include "edit-impl.h" +#include "editwidget.h" + +/*** global variables ****************************************************************************/ + +gboolean auto_syntax = TRUE; + +/*** file scope macro definitions ****************************************************************/ + +/* bytes */ +#define SYNTAX_MARKER_DENSITY 512 + +#define RULE_ON_LEFT_BORDER 1 +#define RULE_ON_RIGHT_BORDER 2 + +#define SYNTAX_TOKEN_STAR '\001' +#define SYNTAX_TOKEN_PLUS '\002' +#define SYNTAX_TOKEN_BRACKET '\003' +#define SYNTAX_TOKEN_BRACE '\004' + +#define break_a { result = line; break; } +#define check_a { if (*a == NULL) { result = line; break; } } +#define check_not_a { if (*a != NULL) { result = line ;break; } } + +#define SYNTAX_KEYWORD(x) ((syntax_keyword_t *) (x)) +#define CONTEXT_RULE(x) ((context_rule_t *) (x)) + +#define ARGS_LEN 1024 + +#define MAX_ENTRY_LEN 40 +#define LIST_LINES 14 +#define N_DFLT_ENTRIES 2 + +/*** file scope type declarations ****************************************************************/ + +typedef struct +{ + GString *keyword; + char *whole_word_chars_left; + char *whole_word_chars_right; + gboolean line_start; + int color; +} syntax_keyword_t; + +typedef struct +{ + GString *left; + unsigned char first_left; + GString *right; + unsigned char first_right; + gboolean line_start_left; + gboolean line_start_right; + gboolean between_delimiters; + char *whole_word_chars_left; + char *whole_word_chars_right; + char *keyword_first_chars; + gboolean spelling; + /* first word is word[1] */ + GPtrArray *keyword; +} context_rule_t; + +typedef struct +{ + off_t offset; + edit_syntax_rule_t rule; +} syntax_marker_t; + +/*** forward declarations (file scope functions) *************************************************/ + +/*** file scope variables ************************************************************************/ + +static char *error_file_name = NULL; + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static void +syntax_keyword_free (gpointer keyword) +{ + syntax_keyword_t *k = SYNTAX_KEYWORD (keyword); + + g_string_free (k->keyword, TRUE); + g_free (k->whole_word_chars_left); + g_free (k->whole_word_chars_right); + g_free (k); +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +context_rule_free (gpointer rule) +{ + context_rule_t *r = CONTEXT_RULE (rule); + + g_string_free (r->left, TRUE); + g_string_free (r->right, TRUE); + g_free (r->whole_word_chars_left); + g_free (r->whole_word_chars_right); + g_free (r->keyword_first_chars); + + if (r->keyword != NULL) + g_ptr_array_free (r->keyword, TRUE); + + g_free (r); +} + +/* --------------------------------------------------------------------------------------------- */ + +static gint +mc_defines_destroy (gpointer key, gpointer value, gpointer data) +{ + (void) data; + + g_free (key); + g_strfreev ((char **) value); + + return FALSE; +} + +/* --------------------------------------------------------------------------------------------- */ +/** Completely destroys the defines tree */ + +static void +destroy_defines (GTree ** defines) +{ + g_tree_foreach (*defines, mc_defines_destroy, NULL); + g_tree_destroy (*defines); + *defines = NULL; +} + +/* --------------------------------------------------------------------------------------------- */ + +/** Wrapper for case insensitive mode */ +inline static int +xx_tolower (const WEdit * edit, int c) +{ + return edit->is_case_insensitive ? tolower (c) : c; +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +subst_defines (GTree * defines, char **argv, char **argv_end) +{ + for (; *argv != NULL && argv < argv_end; argv++) + { + char **t; + + t = g_tree_lookup (defines, *argv); + if (t != NULL) + { + int argc, count; + char **p; + + /* Count argv array members */ + argc = g_strv_length (argv + 1); + + /* Count members of definition array */ + count = g_strv_length (t); + + p = argv + count + argc; + /* Buffer overflow or infinitive loop in define */ + if (p >= argv_end) + break; + + /* Move rest of argv after definition members */ + while (argc >= 0) + *p-- = argv[argc-- + 1]; + + /* Copy definition members to argv */ + for (p = argv; *t != NULL; *p++ = *t++) + ; + } + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static off_t +compare_word_to_right (const WEdit * edit, off_t i, const GString * text, + const char *whole_left, const char *whole_right, gboolean line_start) +{ + const unsigned char *p, *q; + int c, d, j; + + c = xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i - 1)); + if ((line_start && c != '\n') || (whole_left != NULL && strchr (whole_left, c) != NULL)) + return -1; + + for (p = (const unsigned char *) text->str, q = p + text->len; p < q; p++, i++) + { + switch (*p) + { + case SYNTAX_TOKEN_STAR: + if (++p > q) + return -1; + while (TRUE) + { + c = xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i)); + if (*p == '\0' && whole_right != NULL && strchr (whole_right, c) == NULL) + break; + if (c == *p) + break; + if (c == '\n') + return -1; + i++; + } + break; + case SYNTAX_TOKEN_PLUS: + if (++p > q) + return -1; + j = 0; + while (TRUE) + { + c = xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i)); + if (c == *p) + { + j = i; + if (p[0] == text->str[0] && p[1] == '\0') /* handle eg '+' and @+@ keywords properly */ + break; + } + if (j != 0 && strchr ((const char *) p + 1, c) != NULL) /* c exists further down, so it will get matched later */ + break; + if (whiteness (c) || (whole_right != NULL && strchr (whole_right, c) == NULL)) + { + if (*p == '\0') + { + i--; + break; + } + if (j == 0) + return -1; + i = j; + break; + } + i++; + } + break; + case SYNTAX_TOKEN_BRACKET: + if (++p > q) + return -1; + c = -1; + while (TRUE) + { + d = c; + c = xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i)); + for (j = 0; p[j] != SYNTAX_TOKEN_BRACKET && p[j] != '\0'; j++) + if (c == p[j]) + goto found_char2; + break; + found_char2: + i++; + } + i--; + while (*p != SYNTAX_TOKEN_BRACKET && p <= q) + p++; + if (p > q) + return -1; + if (p[1] == d) + i--; + break; + case SYNTAX_TOKEN_BRACE: + if (++p > q) + return -1; + c = xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i)); + for (; *p != SYNTAX_TOKEN_BRACE && *p != '\0'; p++) + if (c == *p) + goto found_char3; + return -1; + found_char3: + while (*p != SYNTAX_TOKEN_BRACE && p < q) + p++; + break; + default: + if (*p != xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i))) + return -1; + } + } + return (whole_right != NULL && + strchr (whole_right, + xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i))) != NULL) ? -1 : i; +} + +/* --------------------------------------------------------------------------------------------- */ + +static const char * +xx_strchr (const WEdit * edit, const unsigned char *s, int char_byte) +{ + while (*s >= '\005' && xx_tolower (edit, *s) != char_byte) + s++; + + return (const char *) s; +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +apply_rules_going_right (WEdit * edit, off_t i) +{ + context_rule_t *r; + int c; + gboolean contextchanged = FALSE; + gboolean found_left = FALSE, found_right = FALSE; + gboolean keyword_foundleft = FALSE, keyword_foundright = FALSE; + gboolean is_end; + off_t end = 0; + edit_syntax_rule_t _rule = edit->rule; + + c = xx_tolower (edit, edit_buffer_get_byte (&edit->buffer, i)); + if (c == 0) + return; + + is_end = (edit->rule.end == i); + + /* check to turn off a keyword */ + if (_rule.keyword != 0) + { + if (edit_buffer_get_byte (&edit->buffer, i - 1) == '\n') + _rule.keyword = 0; + if (is_end) + { + _rule.keyword = 0; + keyword_foundleft = TRUE; + } + } + + /* check to turn off a context */ + if (_rule.context != 0 && _rule.keyword == 0) + { + off_t e; + + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, _rule.context)); + if (r->first_right == c && (edit->rule.border & RULE_ON_RIGHT_BORDER) == 0 + && r->right->len != 0 && (e = + compare_word_to_right (edit, i, r->right, + r->whole_word_chars_left, + r->whole_word_chars_right, + r->line_start_right)) > 0) + { + _rule.end = e; + found_right = TRUE; + _rule.border = RULE_ON_RIGHT_BORDER; + if (r->between_delimiters) + _rule.context = 0; + } + else if (is_end && (edit->rule.border & RULE_ON_RIGHT_BORDER) != 0) + { + /* always turn off a context at 4 */ + found_left = TRUE; + _rule.border = 0; + if (!keyword_foundleft) + _rule.context = 0; + } + else if (is_end && (edit->rule.border & RULE_ON_LEFT_BORDER) != 0) + { + /* never turn off a context at 2 */ + found_left = TRUE; + _rule.border = 0; + } + } + + /* check to turn on a keyword */ + if (_rule.keyword == 0) + { + const char *p; + + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, _rule.context)); + p = r->keyword_first_chars; + + if (p != NULL) + while (*(p = xx_strchr (edit, (const unsigned char *) p + 1, c)) != '\0') + { + syntax_keyword_t *k; + int count; + off_t e = -1; + + count = p - r->keyword_first_chars; + k = SYNTAX_KEYWORD (g_ptr_array_index (r->keyword, count)); + if (k->keyword != 0) + e = compare_word_to_right (edit, i, k->keyword, k->whole_word_chars_left, + k->whole_word_chars_right, k->line_start); + if (e > 0) + { + /* when both context and keyword terminate with a newline, + the context overflows to the next line and colorizes it incorrectly */ + if (e > i + 1 && _rule._context != 0 + && k->keyword->str[k->keyword->len - 1] == '\n') + { + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, _rule._context)); + if (r->right != NULL && r->right->len != 0 + && r->right->str[r->right->len - 1] == '\n') + e--; + } + + end = e; + _rule.end = e; + _rule.keyword = count; + keyword_foundright = TRUE; + break; + } + } + } + + /* check to turn on a context */ + if (_rule.context == 0) + { + if (!found_left && is_end) + { + if ((edit->rule.border & RULE_ON_RIGHT_BORDER) != 0) + { + _rule.border = 0; + _rule.context = 0; + contextchanged = TRUE; + _rule.keyword = 0; + + } + else if ((edit->rule.border & RULE_ON_LEFT_BORDER) != 0) + { + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, _rule._context)); + _rule.border = 0; + if (r->between_delimiters) + { + _rule.context = _rule._context; + contextchanged = TRUE; + _rule.keyword = 0; + + if (r->first_right == c) + { + off_t e = -1; + + if (r->right->len != 0) + e = compare_word_to_right (edit, i, r->right, r->whole_word_chars_left, + r->whole_word_chars_right, + r->line_start_right); + if (e >= end) + { + _rule.end = e; + found_right = TRUE; + _rule.border = RULE_ON_RIGHT_BORDER; + _rule.context = 0; + } + } + } + } + } + + if (!found_right) + { + size_t count; + + for (count = 1; count < edit->rules->len; count++) + { + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, count)); + if (r->first_left == c) + { + off_t e = -1; + + if (r->left->len != 0) + e = compare_word_to_right (edit, i, r->left, r->whole_word_chars_left, + r->whole_word_chars_right, r->line_start_left); + if (e >= end && (_rule.keyword == 0 || keyword_foundright)) + { + _rule.end = e; + _rule.border = RULE_ON_LEFT_BORDER; + _rule._context = count; + if (!r->between_delimiters && _rule.keyword == 0) + { + _rule.context = count; + contextchanged = TRUE; + } + break; + } + } + } + } + } + + /* check again to turn on a keyword if the context switched */ + if (contextchanged && _rule.keyword == 0) + { + const char *p; + + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, _rule.context)); + p = r->keyword_first_chars; + + while (*(p = xx_strchr (edit, (const unsigned char *) p + 1, c)) != '\0') + { + syntax_keyword_t *k; + int count; + off_t e = -1; + + count = p - r->keyword_first_chars; + k = SYNTAX_KEYWORD (g_ptr_array_index (r->keyword, count)); + + if (k->keyword->len != 0) + e = compare_word_to_right (edit, i, k->keyword, k->whole_word_chars_left, + k->whole_word_chars_right, k->line_start); + if (e > 0) + { + _rule.end = e; + _rule.keyword = count; + break; + } + } + } + + edit->rule = _rule; +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +edit_get_rule (WEdit * edit, off_t byte_index) +{ + off_t i; + + if (byte_index > edit->last_get_rule) + { + for (i = edit->last_get_rule + 1; i <= byte_index; i++) + { + off_t d = SYNTAX_MARKER_DENSITY; + + apply_rules_going_right (edit, i); + + if (edit->syntax_marker != NULL) + d += ((syntax_marker_t *) edit->syntax_marker->data)->offset; + + if (i > d) + { + syntax_marker_t *s; + + s = g_new (syntax_marker_t, 1); + s->offset = i; + s->rule = edit->rule; + edit->syntax_marker = g_slist_prepend (edit->syntax_marker, s); + } + } + } + else if (byte_index < edit->last_get_rule) + { + while (TRUE) + { + syntax_marker_t *s; + + if (edit->syntax_marker == NULL) + { + memset (&edit->rule, 0, sizeof (edit->rule)); + for (i = -1; i <= byte_index; i++) + apply_rules_going_right (edit, i); + break; + } + + s = (syntax_marker_t *) edit->syntax_marker->data; + + if (byte_index >= s->offset) + { + edit->rule = s->rule; + for (i = s->offset + 1; i <= byte_index; i++) + apply_rules_going_right (edit, i); + break; + } + + g_free (s); + edit->syntax_marker = g_slist_delete_link (edit->syntax_marker, edit->syntax_marker); + } + } + edit->last_get_rule = byte_index; +} + +/* --------------------------------------------------------------------------------------------- */ + +static int +translate_rule_to_color (const WEdit * edit, const edit_syntax_rule_t * rule) +{ + syntax_keyword_t *k; + context_rule_t *r; + + r = CONTEXT_RULE (g_ptr_array_index (edit->rules, rule->context)); + k = SYNTAX_KEYWORD (g_ptr_array_index (r->keyword, rule->keyword)); + + return k->color; +} + +/* --------------------------------------------------------------------------------------------- */ +/** + Returns 0 on error/eof or a count of the number of bytes read + including the newline. Result must be free'd. + In case of an error, *line will not be modified. + */ + +static size_t +read_one_line (char **line, FILE * f) +{ + GString *p; + size_t r = 0; + + /* not reallocate string too often */ + p = g_string_sized_new (64); + + while (TRUE) + { + int c; + + c = fgetc (f); + if (c == EOF) + { + if (ferror (f)) + { + if (errno == EINTR) + continue; + r = 0; + } + break; + } + r++; + + /* handle all of \r\n, \r, \n correctly. */ + if (c == '\n') + break; + if (c == '\r') + { + c = fgetc (f); + if (c == '\n') + r++; + else + ungetc (c, f); + break; + } + + g_string_append_c (p, c); + } + if (r != 0) + *line = g_string_free (p, FALSE); + else + g_string_free (p, TRUE); + + return r; +} + +/* --------------------------------------------------------------------------------------------- */ + +static char * +convert (char *s) +{ + char *r, *p; + + p = r = s; + while (*s) + { + switch (*s) + { + case '\\': + s++; + switch (*s) + { + case ' ': + *p = ' '; + s--; + break; + case 'n': + *p = '\n'; + break; + case 'r': + *p = '\r'; + break; + case 't': + *p = '\t'; + break; + case 's': + *p = ' '; + break; + case '*': + *p = '*'; + break; + case '\\': + *p = '\\'; + break; + case '[': + case ']': + *p = SYNTAX_TOKEN_BRACKET; + break; + case '{': + case '}': + *p = SYNTAX_TOKEN_BRACE; + break; + case 0: + *p = *s; + return r; + default: + *p = *s; + break; + } + break; + case '*': + *p = SYNTAX_TOKEN_STAR; + break; + case '+': + *p = SYNTAX_TOKEN_PLUS; + break; + default: + *p = *s; + break; + } + s++; + p++; + } + *p = '\0'; + return r; +} + +/* --------------------------------------------------------------------------------------------- */ + +static int +get_args (char *l, char **args, int args_size) +{ + int argc = 0; + + while (argc < args_size) + { + char *p = l; + + while (*p != '\0' && whiteness (*p)) + p++; + if (*p == '\0') + break; + for (l = p + 1; *l != '\0' && !whiteness (*l); l++) + ; + if (*l != '\0') + *l++ = '\0'; + args[argc++] = convert (p); + } + args[argc] = (char *) NULL; + return argc; +} + +/* --------------------------------------------------------------------------------------------- */ + +static int +this_try_alloc_color_pair (const char *fg, const char *bg, const char *attrs) +{ + char f[80], b[80], a[80], *p; + + if (bg != NULL && *bg == '\0') + bg = NULL; + if (fg != NULL && *fg == '\0') + fg = NULL; + if (attrs != NULL && *attrs == '\0') + attrs = NULL; + + if ((fg == NULL) && (bg == NULL)) + return EDITOR_NORMAL_COLOR; + + if (fg != NULL) + { + g_strlcpy (f, fg, sizeof (f)); + p = strchr (f, '/'); + if (p != NULL) + *p = '\0'; + fg = f; + } + if (bg != NULL) + { + g_strlcpy (b, bg, sizeof (b)); + p = strchr (b, '/'); + if (p != NULL) + *p = '\0'; + bg = b; + } + if ((fg == NULL) || (bg == NULL)) + { + /* get colors from skin */ + char *editnormal; + + editnormal = mc_skin_get ("editor", "_default_", "default;default"); + + if (fg == NULL) + { + g_strlcpy (f, editnormal, sizeof (f)); + p = strchr (f, ';'); + if (p != NULL) + *p = '\0'; + if (f[0] == '\0') + g_strlcpy (f, "default", sizeof (f)); + fg = f; + } + if (bg == NULL) + { + p = strchr (editnormal, ';'); + if ((p != NULL) && (*(++p) != '\0')) + g_strlcpy (b, p, sizeof (b)); + else + g_strlcpy (b, "default", sizeof (b)); + bg = b; + } + + g_free (editnormal); + } + + if (attrs != NULL) + { + g_strlcpy (a, attrs, sizeof (a)); + p = strchr (a, '/'); + if (p != NULL) + *p = '\0'; + /* get_args() mangles the + signs, unmangle 'em */ + p = a; + while ((p = strchr (p, SYNTAX_TOKEN_PLUS)) != NULL) + *p++ = '+'; + attrs = a; + } + return tty_try_alloc_color_pair (fg, bg, attrs); +} + +/* --------------------------------------------------------------------------------------------- */ + +static FILE * +open_include_file (const char *filename) +{ + FILE *f; + + g_free (error_file_name); + error_file_name = g_strdup (filename); + if (g_path_is_absolute (filename)) + return fopen (filename, "r"); + + g_free (error_file_name); + error_file_name = + g_build_filename (mc_config_get_data_path (), EDIT_SYNTAX_DIR, filename, (char *) NULL); + f = fopen (error_file_name, "r"); + if (f != NULL) + return f; + + g_free (error_file_name); + error_file_name = + g_build_filename (mc_global.share_data_dir, EDIT_SYNTAX_DIR, filename, (char *) NULL); + + return fopen (error_file_name, "r"); +} + +/* --------------------------------------------------------------------------------------------- */ + +inline static void +xx_lowerize_line (WEdit * edit, char *line, size_t len) +{ + if (edit->is_case_insensitive) + { + size_t i; + + for (i = 0; i < len; ++i) + line[i] = tolower (line[i]); + } +} + +/* --------------------------------------------------------------------------------------------- */ +/** returns line number on error */ + +static int +edit_read_syntax_rules (WEdit * edit, FILE * f, char **args, int args_size) +{ + FILE *g = NULL; + char *fg, *bg, *attrs; + char last_fg[32] = "", last_bg[32] = "", last_attrs[64] = ""; + char whole_right[512]; + char whole_left[512]; + char *l = NULL; + int save_line = 0, line = 0; + context_rule_t *c = NULL; + gboolean no_words = TRUE; + int result = 0; + + args[0] = NULL; + edit->is_case_insensitive = FALSE; + + strcpy (whole_left, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_01234567890"); + strcpy (whole_right, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_01234567890"); + + edit->rules = g_ptr_array_new_with_free_func (context_rule_free); + + if (edit->defines == NULL) + edit->defines = g_tree_new ((GCompareFunc) strcmp); + + while (TRUE) + { + char **a; + size_t len; + int argc; + + line++; + l = NULL; + + len = read_one_line (&l, f); + if (len == 0) + { + if (g == NULL) + break; + + fclose (f); + f = g; + g = NULL; + line = save_line + 1; + MC_PTR_FREE (error_file_name); + MC_PTR_FREE (l); + len = read_one_line (&l, f); + if (len == 0) + break; + } + + xx_lowerize_line (edit, l, len); + + argc = get_args (l, args, args_size); + a = args + 1; + if (args[0] == NULL) + { + /* do nothing */ + } + else if (strcmp (args[0], "include") == 0) + { + if (g != NULL || argc != 2) + { + result = line; + break; + } + g = f; + f = open_include_file (args[1]); + if (f == NULL) + { + MC_PTR_FREE (error_file_name); + result = line; + break; + } + save_line = line; + line = 0; + } + else if (strcmp (args[0], "caseinsensitive") == 0) + { + edit->is_case_insensitive = TRUE; + } + else if (strcmp (args[0], "wholechars") == 0) + { + check_a; + if (strcmp (*a, "left") == 0) + { + a++; + g_strlcpy (whole_left, *a, sizeof (whole_left)); + } + else if (strcmp (*a, "right") == 0) + { + a++; + g_strlcpy (whole_right, *a, sizeof (whole_right)); + } + else + { + g_strlcpy (whole_left, *a, sizeof (whole_left)); + g_strlcpy (whole_right, *a, sizeof (whole_right)); + } + a++; + check_not_a; + } + else if (strcmp (args[0], "context") == 0) + { + syntax_keyword_t *k; + + check_a; + if (edit->rules->len == 0) + { + /* first context is the default */ + if (strcmp (*a, "default") != 0) + break_a; + + a++; + c = g_new0 (context_rule_t, 1); + g_ptr_array_add (edit->rules, c); + c->left = g_string_new (" "); + c->right = g_string_new (" "); + } + else + { + /* Start new context. */ + c = g_new0 (context_rule_t, 1); + g_ptr_array_add (edit->rules, c); + if (strcmp (*a, "exclusive") == 0) + { + a++; + c->between_delimiters = TRUE; + } + check_a; + if (strcmp (*a, "whole") == 0) + { + a++; + c->whole_word_chars_left = g_strdup (whole_left); + c->whole_word_chars_right = g_strdup (whole_right); + } + else if (strcmp (*a, "wholeleft") == 0) + { + a++; + c->whole_word_chars_left = g_strdup (whole_left); + } + else if (strcmp (*a, "wholeright") == 0) + { + a++; + c->whole_word_chars_right = g_strdup (whole_right); + } + check_a; + if (strcmp (*a, "linestart") == 0) + { + a++; + c->line_start_left = TRUE; + } + check_a; + c->left = g_string_new (*a++); + check_a; + if (strcmp (*a, "linestart") == 0) + { + a++; + c->line_start_right = TRUE; + } + check_a; + c->right = g_string_new (*a++); + c->first_left = c->left->str[0]; + c->first_right = c->right->str[0]; + } + c->keyword = g_ptr_array_new_with_free_func (syntax_keyword_free); + k = g_new0 (syntax_keyword_t, 1); + g_ptr_array_add (c->keyword, k); + no_words = FALSE; + subst_defines (edit->defines, a, &args[ARGS_LEN]); + fg = *a; + if (*a != NULL) + a++; + bg = *a; + if (*a != NULL) + a++; + attrs = *a; + if (*a != NULL) + a++; + g_strlcpy (last_fg, fg != NULL ? fg : "", sizeof (last_fg)); + g_strlcpy (last_bg, bg != NULL ? bg : "", sizeof (last_bg)); + g_strlcpy (last_attrs, attrs != NULL ? attrs : "", sizeof (last_attrs)); + k->color = this_try_alloc_color_pair (fg, bg, attrs); + k->keyword = g_string_new (" "); + check_not_a; + } + else if (strcmp (args[0], "spellcheck") == 0) + { + if (c == NULL) + { + result = line; + break; + } + c->spelling = TRUE; + } + else if (strcmp (args[0], "keyword") == 0) + { + context_rule_t *last_rule; + syntax_keyword_t *k; + + if (no_words) + break_a; + check_a; + last_rule = CONTEXT_RULE (g_ptr_array_index (edit->rules, edit->rules->len - 1)); + k = g_new0 (syntax_keyword_t, 1); + g_ptr_array_add (last_rule->keyword, k); + if (strcmp (*a, "whole") == 0) + { + a++; + k->whole_word_chars_left = g_strdup (whole_left); + k->whole_word_chars_right = g_strdup (whole_right); + } + else if (strcmp (*a, "wholeleft") == 0) + { + a++; + k->whole_word_chars_left = g_strdup (whole_left); + } + else if (strcmp (*a, "wholeright") == 0) + { + a++; + k->whole_word_chars_right = g_strdup (whole_right); + } + check_a; + if (strcmp (*a, "linestart") == 0) + { + a++; + k->line_start = TRUE; + } + check_a; + if (strcmp (*a, "whole") == 0) + break_a; + + k->keyword = g_string_new (*a++); + subst_defines (edit->defines, a, &args[ARGS_LEN]); + fg = *a; + if (*a != NULL) + a++; + bg = *a; + if (*a != NULL) + a++; + attrs = *a; + if (*a != NULL) + a++; + if (fg == NULL) + fg = last_fg; + if (bg == NULL) + bg = last_bg; + if (attrs == NULL) + attrs = last_attrs; + k->color = this_try_alloc_color_pair (fg, bg, attrs); + check_not_a; + } + else if (*(args[0]) == '#') + { + /* do nothing for comment */ + } + else if (strcmp (args[0], "file") == 0) + { + break; + } + else if (strcmp (args[0], "define") == 0) + { + char *key = *a++; + char **argv; + + if (argc < 3) + break_a; + argv = g_tree_lookup (edit->defines, key); + if (argv != NULL) + mc_defines_destroy (NULL, argv, NULL); + else + key = g_strdup (key); + + argv = g_new (char *, argc - 1); + g_tree_insert (edit->defines, key, argv); + while (*a != NULL) + *argv++ = g_strdup (*a++); + *argv = NULL; + } + else + { + /* anything else is an error */ + break_a; + } + MC_PTR_FREE (l); + } + MC_PTR_FREE (l); + + if (edit->rules->len == 0) + { + g_ptr_array_free (edit->rules, TRUE); + edit->rules = NULL; + } + + if (result == 0) + { + size_t i; + GString *first_chars; + + if (edit->rules == NULL) + return line; + + first_chars = g_string_sized_new (32); + + /* collect first character of keywords */ + for (i = 0; i < edit->rules->len; i++) + { + size_t j; + + g_string_set_size (first_chars, 0); + c = CONTEXT_RULE (g_ptr_array_index (edit->rules, i)); + + g_string_append_c (first_chars, (char) 1); + for (j = 1; j < c->keyword->len; j++) + { + syntax_keyword_t *k; + + k = SYNTAX_KEYWORD (g_ptr_array_index (c->keyword, j)); + g_string_append_c (first_chars, k->keyword->str[0]); + } + + c->keyword_first_chars = g_strndup (first_chars->str, first_chars->len); + } + + g_string_free (first_chars, TRUE); + } + + return result; +} + +/* --------------------------------------------------------------------------------------------- */ + +/* returns -1 on file error, line number on error in file syntax */ +static int +edit_read_syntax_file (WEdit * edit, GPtrArray * pnames, const char *syntax_file, + const char *editor_file, const char *first_line, const char *type) +{ + FILE *f, *g = NULL; + char *args[ARGS_LEN], *l = NULL; + long line = 0; + int result = 0; + gboolean found = FALSE; + + f = fopen (syntax_file, "r"); + if (f == NULL) + { + char *global_syntax_file; + + global_syntax_file = + g_build_filename (mc_global.share_data_dir, EDIT_SYNTAX_FILE, (char *) NULL); + f = fopen (global_syntax_file, "r"); + g_free (global_syntax_file); + if (f == NULL) + return -1; + } + + args[0] = NULL; + while (TRUE) + { + line++; + MC_PTR_FREE (l); + if (read_one_line (&l, f) == 0) + break; + (void) get_args (l, args, ARGS_LEN - 1); /* Final NULL */ + if (args[0] == NULL) + continue; + + /* Looking for 'include ...' lines before first 'file ...' ones */ + if (!found && strcmp (args[0], "include") == 0) + { + if (args[1] == NULL || (g = open_include_file (args[1])) == NULL) + { + result = line; + break; + } + goto found_type; + } + + /* looking for 'file ...' lines only */ + if (strcmp (args[0], "file") != 0) + continue; + + found = TRUE; + + /* must have two args or report error */ + if (args[1] == NULL || args[2] == NULL) + { + result = line; + break; + } + + if (pnames != NULL) + { + /* 1: just collecting a list of names of rule sets */ + g_ptr_array_add (pnames, g_strdup (args[2])); + } + else if (type != NULL) + { + /* 2: rule set was explicitly specified by the caller */ + if (strcmp (type, args[2]) == 0) + goto found_type; + } + else if (editor_file != NULL && edit != NULL) + { + /* 3: auto-detect rule set from regular expressions */ + gboolean q; + + q = mc_search (args[1], DEFAULT_CHARSET, editor_file, MC_SEARCH_T_REGEX); + /* does filename match arg 1 ? */ + if (!q && args[3] != NULL) + { + /* does first line match arg 3 ? */ + q = mc_search (args[3], DEFAULT_CHARSET, first_line, MC_SEARCH_T_REGEX); + } + if (q) + { + int line_error; + char *syntax_type; + + found_type: + syntax_type = args[2]; + line_error = edit_read_syntax_rules (edit, g ? g : f, args, ARGS_LEN - 1); + if (line_error != 0) + { + if (error_file_name == NULL) /* an included file */ + result = line + line_error; + else + result = line_error; + } + else + { + g_free (edit->syntax_type); + edit->syntax_type = g_strdup (syntax_type); + /* if there are no rules then turn off syntax highlighting for speed */ + if (g == NULL && edit->rules->len == 1) + { + context_rule_t *r0; + + r0 = CONTEXT_RULE (g_ptr_array_index (edit->rules, 0)); + if (r0->keyword->len == 1 && !r0->spelling) + { + edit_free_syntax_rules (edit); + break; + } + } + } + + if (g == NULL) + break; + + fclose (g); + g = NULL; + } + } + } + g_free (l); + fclose (f); + return result; +} + +/* --------------------------------------------------------------------------------------------- */ + +static const char * +get_first_editor_line (WEdit * edit) +{ + static char s[256]; + + s[0] = '\0'; + + if (edit != NULL) + { + size_t i; + + for (i = 0; i < sizeof (s) - 1; i++) + { + s[i] = edit_buffer_get_byte (&edit->buffer, i); + if (s[i] == '\n') + { + s[i] = '\0'; + break; + } + } + + s[sizeof (s) - 1] = '\0'; + } + + return s; +} + +/* --------------------------------------------------------------------------------------------- */ + +static int +pstrcmp (const void *p1, const void *p2) +{ + return strcmp (*(char *const *) p1, *(char *const *) p2); +} + +/* --------------------------------------------------------------------------------------------- */ + +static int +exec_edit_syntax_dialog (const GPtrArray * names, const char *current_syntax) +{ + size_t i; + Listbox *syntaxlist; + + syntaxlist = listbox_window_new (LIST_LINES, MAX_ENTRY_LEN, + _("Choose syntax highlighting"), NULL); + LISTBOX_APPEND_TEXT (syntaxlist, 'A', _("< Auto >"), NULL, FALSE); + LISTBOX_APPEND_TEXT (syntaxlist, 'R', _("< Reload Current Syntax >"), NULL, FALSE); + + for (i = 0; i < names->len; i++) + { + const char *name; + + name = g_ptr_array_index (names, i); + LISTBOX_APPEND_TEXT (syntaxlist, 0, name, NULL, FALSE); + if (current_syntax != NULL && strcmp (name, current_syntax) == 0) + listbox_set_current (syntaxlist->list, i + N_DFLT_ENTRIES); + } + + return listbox_run (syntaxlist); +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +int +edit_get_syntax_color (WEdit * edit, off_t byte_index) +{ + if (!tty_use_colors ()) + return 0; + + if (edit_options.syntax_highlighting && edit->rules != NULL && byte_index < edit->buffer.size) + { + edit_get_rule (edit, byte_index); + return translate_rule_to_color (edit, &edit->rule); + } + + return EDITOR_NORMAL_COLOR; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +edit_free_syntax_rules (WEdit * edit) +{ + if (edit == NULL) + return; + + if (edit->defines != NULL) + destroy_defines (&edit->defines); + + if (edit->rules == NULL) + return; + + edit_get_rule (edit, -1); + MC_PTR_FREE (edit->syntax_type); + + g_ptr_array_free (edit->rules, TRUE); + edit->rules = NULL; + g_clear_slist (&edit->syntax_marker, g_free); + tty_color_free_all_tmp (); +} + +/* --------------------------------------------------------------------------------------------- */ +/** + * Load rules into edit struct. Either edit or *pnames must be NULL. If + * edit is NULL, a list of types will be stored into names. If type is + * NULL, then the type will be selected according to the filename. + * type must be edit->syntax_type or NULL + */ +void +edit_load_syntax (WEdit * edit, GPtrArray * pnames, const char *type) +{ + int r; + char *f = NULL; + + if (auto_syntax) + type = NULL; + + if (edit != NULL) + { + char *saved_type; + + saved_type = g_strdup (type); /* save edit->syntax_type */ + edit_free_syntax_rules (edit); + edit->syntax_type = saved_type; /* restore edit->syntax_type */ + } + + if (!tty_use_colors ()) + return; + + if (!edit_options.syntax_highlighting && (pnames == NULL || pnames->len == 0)) + return; + + if (edit != NULL && edit->filename_vpath == NULL) + return; + + f = mc_config_get_full_path (EDIT_SYNTAX_FILE); + if (edit != NULL) + r = edit_read_syntax_file (edit, pnames, f, vfs_path_as_str (edit->filename_vpath), + get_first_editor_line (edit), + auto_syntax ? NULL : edit->syntax_type); + else + r = edit_read_syntax_file (NULL, pnames, f, NULL, "", NULL); + if (r == -1) + { + edit_free_syntax_rules (edit); + message (D_ERROR, _("Load syntax file"), + _("Cannot open file %s\n%s"), f, unix_error_string (errno)); + } + else if (r != 0) + { + edit_free_syntax_rules (edit); + message (D_ERROR, _("Load syntax file"), + _("Error in file %s on line %d"), error_file_name != NULL ? error_file_name : f, + r); + MC_PTR_FREE (error_file_name); + } + + g_free (f); +} + +/* --------------------------------------------------------------------------------------------- */ + +const char * +edit_get_syntax_type (const WEdit * edit) +{ + return edit->syntax_type; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +edit_syntax_dialog (WEdit * edit) +{ + GPtrArray *names; + int syntax; + + names = g_ptr_array_new_with_free_func (g_free); + + /* We fill the list of syntax files every time the editor is invoked. + Instead we could save the list to a file and update it once the syntax + file gets updated (either by testing or by explicit user command). */ + edit_load_syntax (NULL, names, NULL); + g_ptr_array_sort (names, pstrcmp); + + syntax = exec_edit_syntax_dialog (names, edit->syntax_type); + if (syntax >= 0) + { + gboolean force_reload = FALSE; + char *current_syntax; + gboolean old_auto_syntax; + + current_syntax = g_strdup (edit->syntax_type); + old_auto_syntax = auto_syntax; + + switch (syntax) + { + case 0: /* auto syntax */ + auto_syntax = TRUE; + break; + case 1: /* reload current syntax */ + force_reload = TRUE; + break; + default: + auto_syntax = FALSE; + g_free (edit->syntax_type); + edit->syntax_type = g_strdup (g_ptr_array_index (names, syntax - N_DFLT_ENTRIES)); + } + + /* Load or unload syntax rules if the option has changed */ + if (force_reload || (auto_syntax && !old_auto_syntax) || old_auto_syntax || + (current_syntax != NULL && edit->syntax_type != NULL && + strcmp (current_syntax, edit->syntax_type) != 0)) + edit_load_syntax (edit, NULL, edit->syntax_type); + + g_free (current_syntax); + } + + g_ptr_array_free (names, TRUE); +} + +/* --------------------------------------------------------------------------------------------- */ |