X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Fmain-readline.c;h=2c81c53c0f69e76d413910bdc1ede305077844cd;hb=1d655de6043b607f39888c1bb88f72d071f2d49a;hp=3bdc70322bd05d39e7706f3471cfeeb6f52190b1;hpb=ae2c4709444ee6fbbf388b853ab4039fcdde2e95;p=protos%2Flibecoli.git

diff --git a/lib/main-readline.c b/lib/main-readline.c
index 3bdc703..2c81c53 100644
--- a/lib/main-readline.c
+++ b/lib/main-readline.c
@@ -1,118 +1,346 @@
-/*
- * Copyright (c) 2016, Olivier MATZ <zer0@droids-corp.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of the University of California, Berkeley nor the
- *       names of its contributors may be used to endorse or promote products
- *       derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2016, Olivier MATZ <zer0@droids-corp.org>
  */
 
+#define _GNU_SOURCE /* for asprintf */
 #include <stdlib.h>
 #include <stdio.h>
+#include <errno.h>
 #include <assert.h>
 
 #include <readline/readline.h>
 #include <readline/history.h>
 
-#include <ecoli_tk_str.h>
-#include <ecoli_tk_seq.h>
-#include <ecoli_tk_space.h>
-#include <ecoli_tk_or.h>
+#include <ecoli_init.h>
+#include <ecoli_node.h>
+#include <ecoli_parse.h>
+#include <ecoli_complete.h>
+#include <ecoli_keyval.h>
+#include <ecoli_node_str.h>
+#include <ecoli_node_seq.h>
+#include <ecoli_node_space.h>
+#include <ecoli_node_or.h>
+#include <ecoli_node_sh_lex.h>
+#include <ecoli_node_int.h>
+#include <ecoli_node_option.h>
+#include <ecoli_node_cmd.h>
+#include <ecoli_node_many.h>
+#include <ecoli_node_once.h>
+#include <ecoli_node_file.h>
 
-static struct ec_tk *commands;
+static struct ec_node *commands;
 
-/* Set to a character describing the type of completion being attempted by
-   rl_complete_internal; available for use by application completion
-   functions. */
-extern int rl_completion_type;
-/* Set to the last key used to invoke one of the completion functions */
-extern int rl_completion_invoking_key;
-
-int my_complete(int x, int y)
+static char *my_completion_entry(const char *s, int state)
 {
-	(void)x;
-	(void)y;
-
-	return 0;
-}
-
-char *my_completion_entry(const char *s, int state)
-{
-	static struct ec_completed_tk *c;
-	static const struct ec_completed_tk_elt *elt;
+	static struct ec_comp *c;
+	static struct ec_comp_iter *iter;
+	const struct ec_comp_item *item;
+	enum ec_comp_type item_type;
+	const char *item_str, *item_display;
 
 	(void)s;
 
+	/* Don't append a quote. Note: there are still some bugs when
+	 * completing a quoted token. */
+	rl_completion_suppress_quote = 1;
+	rl_completer_quote_characters = "\"'";
+
 	if (state == 0) {
-		char *start;
+		char *line;
 
-		if (c != NULL)
-			ec_completed_tk_free(c);
+		ec_comp_free(c);
+		line = strdup(rl_line_buffer);
+		if (line == NULL)
+			return NULL;
+		line[rl_point] = '\0';
 
-		start = strdup(rl_line_buffer);
-		if (start == NULL)
+		c = ec_node_complete(commands, line);
+		free(line);
+		if (c == NULL)
 			return NULL;
-		start[rl_point] = '\0';
 
-		c = ec_tk_complete(commands, start);
-		ec_completed_tk_iter_start(c);
+		ec_comp_iter_free(iter);
+		iter = ec_comp_iter(c, EC_COMP_FULL | EC_COMP_PARTIAL);
+		if (iter == NULL)
+			return NULL;
 	}
 
-	elt = ec_completed_tk_iter_next(c);
-	if (elt == NULL)
+	item = ec_comp_iter_next(iter);
+	if (item == NULL)
 		return NULL;
 
-	return strdup(elt->full);
+	item_str = ec_comp_item_get_str(item);
+	if (c->count_full == 1) {
+
+		/* don't add the trailing space for partial completions */
+		if (state == 0) {
+			item_type = ec_comp_item_get_type(item);
+			if (item_type == EC_COMP_FULL)
+				rl_completion_suppress_append = 0;
+			else
+				rl_completion_suppress_append = 1;
+		}
+
+		return strdup(item_str);
+	} else if (rl_completion_type == '?') {
+		/* on second try only show the display part */
+		item_display = ec_comp_item_get_display(item);
+		return strdup(item_display);
+	}
+
+	return strdup(item_str);
 }
 
-char **my_attempted_completion(const char *text, int start, int end)
+static char **my_attempted_completion(const char *text, int start, int end)
 {
 	(void)start;
 	(void)end;
-	// XXX when it returns NULL, it completes with a file
+
+	/* remove default file completion */
+	rl_attempted_completion_over = 1;
+
 	return rl_completion_matches(text, my_completion_entry);
 }
 
+/* this function builds the help string */
+static char *get_node_help(const struct ec_comp_item *item)
+{
+	const struct ec_comp_group *grp;
+	const struct ec_parse *state;
+	const struct ec_node *node;
+	char *help = NULL;
+	const char *node_help = NULL;
+	const char *node_desc = NULL;
+
+	grp = ec_comp_item_get_grp(item);
+	state = grp->state;
+	for (state = grp->state; state != NULL;
+	     state = ec_parse_get_parent(state)) {
+		node = ec_parse_get_node(state);
+		if (node_help == NULL)
+			node_help = ec_keyval_get(ec_node_attrs(node), "help");
+		if (node_desc == NULL)
+			node_desc = ec_node_desc(node);
+	}
+
+	if (node_help == NULL)
+		node_help = "-";
+	if (node_desc == NULL)
+		return NULL;
+
+	if (asprintf(&help, "%-20s %s", node_desc, node_help) < 0)
+		return NULL;
+
+	return help;
+}
+
+static int show_help(int ignore, int invoking_key)
+{
+	struct ec_comp_iter *iter = NULL;
+	const struct ec_comp_group *grp, *prev_grp = NULL;
+	const struct ec_comp_item *item;
+	struct ec_comp *c = NULL;
+	struct ec_parse *p = NULL;
+	char *line = NULL;
+	unsigned int count;
+	char **helps = NULL;
+	int match = 0;
+	int cols;
+
+	(void)ignore;
+	(void)invoking_key;
+
+	line = strdup(rl_line_buffer);
+	if (line == NULL)
+		goto fail;
+
+	/* check if the current line matches */
+	p = ec_node_parse(commands, line);
+	if (ec_parse_matches(p))
+		match = 1;
+	ec_parse_free(p);
+	p = NULL;
+
+	/* complete at current cursor position */
+	line[rl_point] = '\0';
+	c = ec_node_complete(commands, line);
+	free(line);
+	line = NULL;
+	if (c == NULL)
+		goto fail;
+
+	/* let's display one contextual help per node */
+	count = 0;
+	iter = ec_comp_iter(c,
+		EC_COMP_UNKNOWN | EC_COMP_FULL | EC_COMP_PARTIAL);
+	if (iter == NULL)
+		goto fail;
+
+	/* strangely, rl_display_match_list() expects first index at 1 */
+	helps = calloc(match + 1, sizeof(char *));
+	if (helps == NULL)
+		goto fail;
+	if (match)
+		helps[1] = "<return>";
+
+	while ((item = ec_comp_iter_next(iter)) != NULL) {
+		char **tmp;
+
+		/* keep one help per group, skip other items  */
+		grp = ec_comp_item_get_grp(item);
+		if (grp == prev_grp)
+			continue;
+
+		prev_grp = grp;
+
+		tmp = realloc(helps, (count + match + 2) * sizeof(char *));
+		if (tmp == NULL)
+			goto fail;
+		helps = tmp;
+		helps[count + match + 1] = get_node_help(item);
+		count++;
+	}
+
+	ec_comp_iter_free(iter);
+	ec_comp_free(c);
+	/* ensure not more than 1 entry per line */
+	rl_get_screen_size(NULL, &cols);
+	rl_display_match_list(helps, count + match, cols);
+	rl_forced_update_display();
+
+	return 0;
+
+fail:
+	ec_comp_iter_free(iter);
+	ec_parse_free(p);
+	free(line);
+	ec_comp_free(c);
+	if (helps != NULL) {
+		while (count--)
+			free(helps[count + match + 1]);
+	}
+	free(helps);
+
+	return 1;
+}
+
+static int create_commands(void)
+{
+	struct ec_node *cmdlist = NULL, *cmd = NULL;
+
+	cmdlist = ec_node("or", EC_NO_ID);
+	if (cmdlist == NULL)
+		goto fail;
+
+
+	cmd = EC_NODE_SEQ(EC_NO_ID,
+		ec_node_str(EC_NO_ID, "hello"),
+		EC_NODE_OR("name",
+			ec_node_str("john", "john"),
+			ec_node_str(EC_NO_ID, "johnny"),
+			ec_node_str(EC_NO_ID, "mike")
+		),
+		ec_node_option(EC_NO_ID, ec_node_int("int", 0, 10, 10))
+	);
+	if (cmd == NULL)
+		goto fail;
+	ec_keyval_set(ec_node_attrs(cmd), "help",
+		"say hello to someone several times", NULL);
+	ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "john")),
+		"help", "specific help for john", NULL);
+	ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "name")),
+		"help", "the name of the person", NULL);
+	ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "int")),
+		"help", "an integer (0-10)", NULL);
+	if (ec_node_or_add(cmdlist, cmd) < 0)
+		goto fail;
+
+
+	cmd = EC_NODE_CMD(EC_NO_ID, "good morning name [count]",
+			EC_NODE_CMD("name", "bob|bobby|michael"),
+			ec_node_int("count", 0, 10, 10));
+	if (cmd == NULL)
+		goto fail;
+	ec_keyval_set(ec_node_attrs(cmd), "help",
+		"say good morning to someone several times", NULL);
+	ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "name")), "help",
+		"the person to greet", NULL);
+	ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "count")), "help",
+		"how many times to greet (0-10)", NULL);
+	if (ec_node_or_add(cmdlist, cmd) < 0)
+		goto fail;
+
+
+	cmd = EC_NODE_CMD(EC_NO_ID,
+			"buy potatoes,carrots,pumpkins");
+	if (cmd == NULL)
+		goto fail;
+	ec_keyval_set(ec_node_attrs(cmd), "help",
+		"buy some vegetables", NULL);
+	if (ec_node_or_add(cmdlist, cmd) < 0)
+		goto fail;
+
+
+	cmd = EC_NODE_CMD(EC_NO_ID, "eat vegetables",
+			ec_node_many("vegetables",
+				EC_NODE_OR(EC_NO_ID,
+					ec_node_str(EC_NO_ID, "potatoes"),
+					ec_node_once(EC_NO_ID,
+						ec_node_str(EC_NO_ID, "carrots")),
+					ec_node_once(EC_NO_ID,
+						ec_node_str(EC_NO_ID, "pumpkins"))),
+			1, 0));
+	if (cmd == NULL)
+		goto fail;
+	ec_keyval_set(ec_node_attrs(cmd), "help",
+		"eat vegetables (take some more potatoes)", NULL);
+	if (ec_node_or_add(cmdlist, cmd) < 0)
+		goto fail;
+
+
+	cmd = EC_NODE_SEQ(EC_NO_ID,
+		ec_node_str(EC_NO_ID, "bye")
+	);
+	ec_keyval_set(ec_node_attrs(cmd), "help", "say bye", NULL);
+	if (ec_node_or_add(cmdlist, cmd) < 0)
+		goto fail;
+
+
+	cmd = EC_NODE_SEQ(EC_NO_ID,
+		ec_node_str(EC_NO_ID, "load"),
+		ec_node("file", EC_NO_ID)
+	);
+	ec_keyval_set(ec_node_attrs(cmd), "help", "load a file", NULL);
+	if (ec_node_or_add(cmdlist, cmd) < 0)
+		goto fail;
+
+
+	commands = ec_node_sh_lex(EC_NO_ID, cmdlist);
+	if (commands == NULL)
+		goto fail;
+
+	return 0;
+
+ fail:
+	fprintf(stderr, "cannot initialize nodes\n");
+	ec_node_free(cmdlist);
+	return -1;
+}
+
 int main(void)
 {
-	struct ec_parsed_tk *p;
-//	const char *name;
+	struct ec_parse *p;
 	char *line;
 
-	commands = ec_tk_seq_new_list(NULL,
-		ec_tk_str_new(NULL, "hello"),
-		ec_tk_space_new(NULL),
-		ec_tk_or_new_list("name",
-			ec_tk_str_new(NULL, "john"),
-			ec_tk_str_new(NULL, "mike"),
-			EC_TK_ENDLIST),
-		EC_TK_ENDLIST);
-	if (commands == NULL) {
-		printf("cannot create token\n");
+	if (ec_init() < 0) {
+		fprintf(stderr, "cannot init ecoli: %s\n", strerror(errno));
 		return 1;
 	}
 
-	//rl_bind_key('\t', my_complete);
+	if (create_commands() < 0)
+		return 1;
 
-	//rl_completion_entry_function = my_completion_entry;
+	rl_bind_key('?', show_help);
 	rl_attempted_completion_function = my_attempted_completion;
 
 	while (1) {
@@ -120,14 +348,14 @@ int main(void)
 		if (line == NULL)
 			break;
 
-		// XXX need a "parse_all"
-		p = ec_tk_parse(commands, line);
-		ec_parsed_tk_dump(stdout, p);
+		p = ec_node_parse(commands, line);
+		ec_parse_dump(stdout, p);
 		add_history(line);
-		ec_parsed_tk_free(p);
+		ec_parse_free(p);
 	}
 
 
-	ec_tk_free(commands);
+	ec_node_free(commands);
 	return 0;
+
 }