mirror of
https://github.com/fish-shell/fish-shell.git
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2401a163fe
darcs-hash:20060228131716-ac50b-0832193dbcaf7191dcb24456dc40f2e861a1382e.gz
552 lines
11 KiB
C
552 lines
11 KiB
C
/** \file highlight.c
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Functions for syntax highlighting
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <wchar.h>
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#include <wctype.h>
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#include <termios.h>
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#include <signal.h>
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#include "config.h"
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#include "fallback.h"
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#include "util.h"
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#include "wutil.h"
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#include "highlight.h"
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#include "tokenizer.h"
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#include "proc.h"
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#include "parser.h"
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#include "parse_util.h"
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#include "builtin.h"
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#include "function.h"
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#include "env.h"
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#include "expand.h"
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#include "sanity.h"
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#include "common.h"
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#include "complete.h"
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#include "output.h"
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static void highlight_universal_internal( wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error );
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/**
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The environment variables used to specify the color of different tokens.
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*/
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static wchar_t *hightlight_var[] =
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{
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L"fish_color_normal",
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L"fish_color_command",
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L"fish_color_subshell",
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L"fish_color_redirection",
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L"fish_color_end",
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L"fish_color_error",
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L"fish_color_param",
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L"fish_color_comment",
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L"fish_color_match",
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L"fish_color_search_match",
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L"fish_color_pager_prefix",
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L"fish_color_pager_completion",
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L"fish_color_pager_description",
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L"fish_color_pager_progress"
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}
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;
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int highlight_get_color( int highlight )
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{
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if( highlight < 0 )
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return FISH_COLOR_NORMAL;
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if( highlight >= (12) )
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return FISH_COLOR_NORMAL;
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wchar_t *val = env_get( hightlight_var[highlight]);
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if( val == 0 )
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val = env_get( hightlight_var[HIGHLIGHT_NORMAL]);
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if( val == 0 )
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{
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return FISH_COLOR_NORMAL;
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}
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return output_color_code( val );
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}
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void highlight_shell( wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error )
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{
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tokenizer tok;
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int had_cmd=0;
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int i;
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int last_val;
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wchar_t *last_cmd=0;
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int len = wcslen(buff);
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if( !len )
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return;
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for( i=0; buff[i] != 0; i++ )
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color[i] = -1;
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for( tok_init( &tok, buff, TOK_SHOW_COMMENTS );
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tok_has_next( &tok );
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tok_next( &tok ) )
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{
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int last_type = tok_last_type( &tok );
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int prev_argc=0;
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switch( last_type )
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{
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case TOK_STRING:
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{
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if( had_cmd )
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{
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/*Parameter */
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wchar_t *param = tok_last( &tok );
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if( param[0] == L'-' )
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{
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if( complete_is_valid_option( last_cmd, param, error ))
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_PARAM;
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else
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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}
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else
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_PARAM;
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}
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}
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else
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{
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prev_argc=0;
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/*
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Command. First check that the command actually exists.
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*/
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wchar_t *cmd = expand_one( 0,
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wcsdup(tok_last( &tok )),
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EXPAND_SKIP_SUBSHELL | EXPAND_SKIP_VARIABLES);
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if( cmd == 0 )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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}
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else
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{
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wchar_t *tmp;
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int is_cmd = 0;
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int is_subcommand = 0;
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int mark = tok_get_pos( &tok );
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_COMMAND;
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if( parser_is_subcommand( cmd ) )
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{
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tok_next( &tok );
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if(( wcscmp( L"-h", tok_last( &tok ) ) == 0 ) ||
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( wcscmp( L"--help", tok_last( &tok ) ) == 0 ) )
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{
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/*
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The builtin and command builtins
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are normally followed by another
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command, but if they are invoked
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with the -h option, their help text
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is displayed instead
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*/
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}
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else
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{
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is_subcommand = 1;
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}
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tok_set_pos( &tok, mark );
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}
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if( !is_subcommand )
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{
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/*
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OK, this is a command, it has been
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successfully expanded and everything
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looks ok. Lets check if the command
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exists.
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*/
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is_cmd |= builtin_exists( cmd );
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is_cmd |= function_exists( cmd );
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is_cmd |= (tmp=get_filename( cmd )) != 0;
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/*
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Could not find the command. Maybe it is a path for a implicit cd command.
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Lets check!
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*/
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if( !is_cmd )
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{
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wchar_t *pp = parser_cdpath_get( cmd );
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if( pp )
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{
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free( pp );
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is_cmd = 1;
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}
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}
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free(tmp);
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if( is_cmd )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_COMMAND;
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}
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else
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{
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if( error )
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al_push( error, wcsdupcat2 ( L"Unknown command \'", cmd, L"\'", 0 ));
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color[ tok_get_pos( &tok ) ] = (HIGHLIGHT_ERROR);
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}
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had_cmd = 1;
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}
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free(cmd);
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if( had_cmd )
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{
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if( last_cmd )
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free( last_cmd );
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last_cmd = wcsdup( tok_last( &tok ) );
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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 TOK_REDIRECT_OUT:
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case TOK_REDIRECT_IN:
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case TOK_REDIRECT_APPEND:
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case TOK_REDIRECT_FD:
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{
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if( !had_cmd )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdup ( L"Redirection without a command" ) );
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break;
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}
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wchar_t *target=0;
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_REDIRECTION;
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tok_next( &tok );
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/*
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Check that we are redirecting into a file
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*/
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switch( tok_last_type( &tok ) )
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{
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case TOK_STRING:
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{
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target = expand_one( 0, wcsdup( tok_last( &tok ) ), EXPAND_SKIP_SUBSHELL);
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/*
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Redirect filename may contain a subshell.
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If so, it will be ignored/not flagged.
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*/
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}
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break;
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default:
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdup ( L"Invalid redirection" ) );
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}
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}
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if( target != 0 )
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{
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wchar_t *dir = wcsdup( target );
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wchar_t *dir_end = wcsrchr( dir, L'/' );
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struct stat buff;
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/*
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If file is in directory other than '.', check
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that the directory exists.
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*/
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if( dir_end != 0 )
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{
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*dir_end = 0;
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if( wstat( dir, &buff ) == -1 )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdupcat2( L"Directory \'", dir, L"\' does not exist", 0 ) );
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}
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}
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free( dir );
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/*
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If the file is read from or appended to, check
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if it exists.
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*/
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if( last_type == TOK_REDIRECT_IN ||
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last_type == TOK_REDIRECT_APPEND )
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{
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if( wstat( target, &buff ) == -1 )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdupcat2( L"File \'", target, L"\' does not exist", 0 ) );
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}
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}
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free( target );
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}
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break;
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}
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case TOK_PIPE:
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case TOK_BACKGROUND:
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{
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if( had_cmd )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_END;
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had_cmd = 0;
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}
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else
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdup ( L"No job to put in background" ) );
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}
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break;
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}
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case TOK_END:
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_END;
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had_cmd = 0;
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break;
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}
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case TOK_COMMENT:
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_COMMENT;
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break;
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}
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case TOK_ERROR:
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default:
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{
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/*
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If the tokenizer reports an error, highlight it as such.
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*/
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if( error )
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al_push( error, wcsdup ( tok_last( &tok) ) );
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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break;
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}
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}
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}
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if( last_cmd )
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free( last_cmd );
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tok_destroy( &tok );
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/*
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Locate and syntax highlight subshells recursively
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*/
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wchar_t *buffcpy = wcsdup( buff );
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wchar_t *subpos=buffcpy;
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int done=0;
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while( 1 )
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{
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wchar_t *begin, *end;
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if( parse_util_locate_cmdsubst( subpos,
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(const wchar_t **)&begin,
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(const wchar_t **)&end,
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1) <= 0)
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{
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break;
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}
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if( !*end )
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done=1;
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else
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*end=0;
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highlight_shell( begin+1, color +(begin-buffcpy)+1, -1, error );
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color[end-buffcpy]=HIGHLIGHT_PARAM;
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if( done )
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break;
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subpos = end+1;
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}
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free( buffcpy);
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last_val=0;
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for( i=0; buff[i] != 0; i++ )
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{
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if( color[i] >= 0 )
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last_val = color[i];
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else
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color[i] = last_val;
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}
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highlight_universal_internal( buff, color, pos, error );
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/*
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Spaces should not be highlighted at all, since it makes cursor look funky in some terminals
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*/
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for( i=0; buff[i]; i++ )
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{
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if( iswspace(buff[i]) )
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{
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color[i]=0;
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}
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}
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}
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/**
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Perform quote and parenthesis highlighting on the specified string.
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*/
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static void highlight_universal_internal( wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error )
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{
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if( (pos >= 0) && (pos < wcslen(buff)) )
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{
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/*
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Highlight matching quotes
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*/
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if( (buff[pos] == L'\'') || (buff[pos] == L'\"') )
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{
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array_list_t l;
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al_init( &l );
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int level=0;
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wchar_t prev_q=0;
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wchar_t *str=buff;
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int match_found=0;
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while(*str)
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{
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switch( *str )
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{
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case L'\\':
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str++;
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break;
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case L'\"':
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case L'\'':
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if( level == 0 )
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{
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level++;
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al_push( &l, (void *)(str-buff) );
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prev_q = *str;
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}
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else
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{
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if( prev_q == *str )
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{
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int pos1, pos2;
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level--;
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pos1 = (int)al_pop( &l );
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pos2 = str-buff;
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if( pos1==pos || pos2==pos )
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{
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color[pos1]|=HIGHLIGHT_MATCH<<8;
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color[pos2]|=HIGHLIGHT_MATCH<<8;
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match_found = 1;
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}
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prev_q = *str==L'\"'?L'\'':L'\"';
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}
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else
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{
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level++;
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al_push( &l, (void *)(str-buff) );
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prev_q = *str;
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}
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}
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break;
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}
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if( (*str == L'\0'))
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break;
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str++;
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}
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al_destroy( &l );
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if( !match_found )
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color[pos] = HIGHLIGHT_ERROR<<8;
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}
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/*
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Highlight matching parenthesis
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*/
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if( wcschr( L"()[]{}", buff[pos] ) )
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{
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int step = wcschr(L"({[", buff[pos])?1:-1;
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wchar_t dec_char = *(wcschr( L"()[]{}", buff[pos] ) + step);
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wchar_t inc_char = buff[pos];
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int level = 0;
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wchar_t *str = &buff[pos];
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int match_found=0;
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while( (str >= buff) && *str)
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{
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if( *str == inc_char )
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level++;
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if( *str == dec_char )
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level--;
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if( level == 0 )
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{
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int pos2 = str-buff;
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color[pos]|=HIGHLIGHT_MATCH<<8;
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color[pos2]|=HIGHLIGHT_MATCH<<8;
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match_found=1;
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break;
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}
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str+= step;
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}
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if( !match_found )
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color[pos] = HIGHLIGHT_ERROR<<8;
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}
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}
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}
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void highlight_universal( wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error )
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{
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int i;
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for( i=0; buff[i] != 0; i++ )
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color[i] = 0;
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highlight_universal_internal( buff, color, pos, error );
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}
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