qulogic/libgnt

Fix arrow keys
fix-arrow-keys
2019-02-20, Petteri Pitkänen
7ac801527b0b
Fix arrow keys

The key-tree expects that for arrow keys the terminal transmits codes that
are defined in the terminfo database, but these codes are transmitted only
in application mode. To make the arrow key handling portable across
terminals, and to prevent the need for manually translating these codes, put
the terminal into application mode by calling ncurses keypad().

Fixes #12676.
/*
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <string.h>
#include "gntinternal.h"
#undef GNT_LOG_DOMAIN
#define GNT_LOG_DOMAIN "Bindable"
#include "gntbindable.h"
#include "gntstyle.h"
#include "gnt.h"
#include "gntutils.h"
#include "gnttextview.h"
#include "gnttree.h"
#include "gntbox.h"
#include "gntbutton.h"
#include "gntwindow.h"
#include "gntlabel.h"
static GObjectClass *parent_class = NULL;
static struct
{
char * okeys; /* Old keystrokes */
char * keys; /* New Keystrokes being bound to the action */
GntBindableClass * klass; /* Class of the object that's getting keys rebound */
char * name; /* The name of the action */
GList * params; /* The list of paramaters */
} rebind_info;
static void
gnt_bindable_free_rebind_info(void)
{
g_free(rebind_info.name);
g_free(rebind_info.keys);
g_free(rebind_info.okeys);
}
static void
gnt_bindable_rebinding_cancel(GntWidget *button, gpointer data)
{
gnt_bindable_free_rebind_info();
gnt_widget_destroy(GNT_WIDGET(data));
}
static void
gnt_bindable_rebinding_rebind(GntWidget *button, gpointer data)
{
if (rebind_info.keys) {
gnt_bindable_register_binding(rebind_info.klass,
NULL,
rebind_info.okeys,
rebind_info.params);
gnt_bindable_register_binding(rebind_info.klass,
rebind_info.name,
rebind_info.keys,
rebind_info.params);
}
gnt_bindable_free_rebind_info();
gnt_widget_destroy(GNT_WIDGET(data));
}
static gboolean
gnt_bindable_rebinding_grab_key(GntBindable *bindable, const char *text, gpointer data)
{
GntTextView *textview = GNT_TEXT_VIEW(data);
char *new_text;
const char *tmp;
if (text && *text) {
/* Rebinding tab or enter for something is probably not that great an idea */
if (!strcmp(text, GNT_KEY_CTRL_I) || !strcmp(text, GNT_KEY_ENTER)) {
return FALSE;
}
tmp = gnt_key_lookup(text);
new_text = g_strdup_printf("KEY: \"%s\"", tmp);
gnt_text_view_clear(textview);
gnt_text_view_append_text_with_flags(textview, new_text, GNT_TEXT_FLAG_NORMAL);
g_free(new_text);
g_free(rebind_info.keys);
rebind_info.keys = g_strdup(text);
return TRUE;
}
return FALSE;
}
static void
gnt_bindable_rebinding_activate(GntBindable *data, gpointer bindable)
{
const char *widget_name = g_type_name(G_OBJECT_TYPE(bindable));
char *keys;
GntWidget *key_textview;
GntWidget *label;
GntWidget *bind_button, *cancel_button;
GntWidget *button_box;
GList *current_row_data;
char *tmp;
GntWidget *win = gnt_window_new();
GntTree *tree = GNT_TREE(data);
GntWidget *vbox = gnt_box_new(FALSE, TRUE);
rebind_info.klass = GNT_BINDABLE_GET_CLASS(bindable);
current_row_data = gnt_tree_get_selection_text_list(tree);
rebind_info.name = g_strdup(g_list_nth_data(current_row_data, 1));
keys = gnt_tree_get_selection_data(tree);
rebind_info.okeys = g_strdup(gnt_key_translate(keys));
rebind_info.params = NULL;
g_list_foreach(current_row_data, (GFunc)g_free, NULL);
g_list_free(current_row_data);
gnt_box_set_alignment(GNT_BOX(vbox), GNT_ALIGN_MID);
gnt_box_set_title(GNT_BOX(win), "Key Capture");
tmp = g_strdup_printf("Type the new bindings for %s in a %s.", rebind_info.name, widget_name);
label = gnt_label_new(tmp);
g_free(tmp);
gnt_box_add_widget(GNT_BOX(vbox), label);
tmp = g_strdup_printf("KEY: \"%s\"", keys);
key_textview = gnt_text_view_new();
gnt_widget_set_size(key_textview, key_textview->priv.x, 2);
gnt_text_view_append_text_with_flags(GNT_TEXT_VIEW(key_textview), tmp, GNT_TEXT_FLAG_NORMAL);
g_free(tmp);
gnt_widget_set_name(key_textview, "keystroke");
gnt_box_add_widget(GNT_BOX(vbox), key_textview);
g_signal_connect(G_OBJECT(win), "key_pressed", G_CALLBACK(gnt_bindable_rebinding_grab_key), key_textview);
button_box = gnt_box_new(FALSE, FALSE);
bind_button = gnt_button_new("BIND");
gnt_widget_set_name(bind_button, "bind");
gnt_box_add_widget(GNT_BOX(button_box), bind_button);
cancel_button = gnt_button_new("Cancel");
gnt_widget_set_name(cancel_button, "cancel");
gnt_box_add_widget(GNT_BOX(button_box), cancel_button);
g_signal_connect(G_OBJECT(bind_button), "activate", G_CALLBACK(gnt_bindable_rebinding_rebind), win);
g_signal_connect(G_OBJECT(cancel_button), "activate", G_CALLBACK(gnt_bindable_rebinding_cancel), win);
gnt_box_add_widget(GNT_BOX(vbox), button_box);
gnt_box_add_widget(GNT_BOX(win), vbox);
gnt_widget_show(win);
}
typedef struct
{
GHashTable *hash;
GntTree *tree;
} BindingView;
static void
add_binding(gpointer key, gpointer value, gpointer data)
{
BindingView *bv = data;
GntBindableActionParam *act = value;
const char *name = g_hash_table_lookup(bv->hash, act->action);
if (name && *name) {
const char *k = gnt_key_lookup(key);
if (!k)
k = key;
gnt_tree_add_row_after(bv->tree, (gpointer)k,
gnt_tree_create_row(bv->tree, k, name), NULL, NULL);
}
}
static void
add_action(gpointer key, gpointer value, gpointer data)
{
BindingView *bv = data;
g_hash_table_insert(bv->hash, value, key);
}
static void
gnt_bindable_class_init(GntBindableClass *klass)
{
parent_class = g_type_class_peek_parent(klass);
klass->actions = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
(GDestroyNotify)gnt_bindable_action_free);
klass->bindings = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
(GDestroyNotify)gnt_bindable_action_param_free);
gnt_style_read_actions(G_OBJECT_CLASS_TYPE(klass), GNT_BINDABLE_CLASS(klass));
GNTDEBUG;
}
static gpointer
bindable_clone(GntBindableAction *action)
{
GntBindableAction *ret = g_new0(GntBindableAction, 1);
ret->name = g_strdup(action->name);
ret->u = action->u;
return ret;
}
static gpointer
binding_clone(GntBindableActionParam *param)
{
GntBindableActionParam *p = g_new0(GntBindableActionParam, 1);
p->list = g_list_copy(param->list);
p->action = param->action;
return p;
}
static void
duplicate_hashes(GntBindableClass *klass)
{
/* Duplicate the bindings from parent class */
if (klass->actions) {
klass->actions = gnt_hash_table_duplicate(klass->actions, g_str_hash,
g_str_equal, g_free, (GDestroyNotify)gnt_bindable_action_free,
(GntDuplicateFunc)g_strdup, (GntDuplicateFunc)bindable_clone);
klass->bindings = gnt_hash_table_duplicate(klass->bindings, g_str_hash,
g_str_equal, g_free, (GDestroyNotify)gnt_bindable_action_param_free,
(GntDuplicateFunc)g_strdup, (GntDuplicateFunc)binding_clone);
} else {
klass->actions = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
(GDestroyNotify)gnt_bindable_action_free);
klass->bindings = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
(GDestroyNotify)gnt_bindable_action_param_free);
}
GNTDEBUG;
}
/******************************************************************************
* GntBindable API
*****************************************************************************/
GType
gnt_bindable_get_type(void)
{
static GType type = 0;
if (type == 0) {
static const GTypeInfo info = {
sizeof(GntBindableClass),
(GBaseInitFunc)duplicate_hashes, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc)gnt_bindable_class_init,
NULL,
NULL, /* class_data */
sizeof(GntBindable),
0, /* n_preallocs */
NULL, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static(G_TYPE_OBJECT,
"GntBindable",
&info, G_TYPE_FLAG_ABSTRACT);
}
return type;
}
/*
* Key Remaps
*/
const char *
gnt_bindable_remap_keys(GntBindable *bindable, const char *text)
{
const char *remap = NULL;
GType type = G_OBJECT_TYPE(bindable);
GntBindableClass *klass = GNT_BINDABLE_CLASS(GNT_BINDABLE_GET_CLASS(bindable));
if (klass->remaps == NULL)
{
klass->remaps = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
gnt_styles_get_keyremaps(type, klass->remaps);
}
remap = g_hash_table_lookup(klass->remaps, text);
return (remap ? remap : text);
}
/*
* Actions and Bindings
*/
gboolean
gnt_bindable_perform_action_named(GntBindable *bindable, const char *name, ...)
{
GntBindableClass *klass = GNT_BINDABLE_CLASS(GNT_BINDABLE_GET_CLASS(bindable));
GList *list = NULL;
va_list args;
GntBindableAction *action;
void *p;
va_start(args, name);
while ((p = va_arg(args, void *)) != NULL)
list = g_list_append(list, p);
va_end(args);
action = g_hash_table_lookup(klass->actions, name);
if (action && action->u.action) {
return action->u.action(bindable, list);
}
return FALSE;
}
gboolean
gnt_bindable_perform_action_key(GntBindable *bindable, const char *keys)
{
GntBindableClass *klass = GNT_BINDABLE_CLASS(GNT_BINDABLE_GET_CLASS(bindable));
GntBindableActionParam *param = g_hash_table_lookup(klass->bindings, keys);
if (param && param->action) {
if (param->list)
return param->action->u.action(bindable, param->list);
else
return param->action->u.action_noparam(bindable);
}
return FALSE;
}
gboolean
gnt_bindable_check_key(GntBindable *bindable, const char *keys) {
GntBindableClass *klass = GNT_BINDABLE_CLASS(GNT_BINDABLE_GET_CLASS(bindable));
GntBindableActionParam *param = g_hash_table_lookup(klass->bindings, keys);
return (param && param->action);
}
static void
register_binding(GntBindableClass *klass, const char *name, const char *trigger, GList *list)
{
GntBindableActionParam *param;
GntBindableAction *action;
if (name == NULL || *name == '\0') {
g_hash_table_remove(klass->bindings, (char*)trigger);
gnt_keys_del_combination(trigger);
return;
}
action = g_hash_table_lookup(klass->actions, name);
if (!action) {
gnt_warning("Invalid action name %s for %s",
name, g_type_name(G_OBJECT_CLASS_TYPE(klass)));
if (list)
g_list_free(list);
return;
}
param = g_new0(GntBindableActionParam, 1);
param->action = action;
param->list = list;
g_hash_table_replace(klass->bindings, g_strdup(trigger), param);
gnt_keys_add_combination(trigger);
}
void gnt_bindable_register_binding(GntBindableClass *klass, const char *name,
const char *trigger, ...)
{
GList *list = NULL;
va_list args;
void *data;
va_start(args, trigger);
while ((data = va_arg(args, void *))) {
list = g_list_append(list, data);
}
va_end(args);
register_binding(klass, name, trigger, list);
}
void gnt_bindable_class_register_action(GntBindableClass *klass, const char *name,
GntBindableActionCallback callback, const char *trigger, ...)
{
void *data;
va_list args;
GntBindableAction *action = g_new0(GntBindableAction, 1);
GList *list;
action->name = g_strdup(name);
action->u.action = callback;
g_hash_table_replace(klass->actions, g_strdup(name), action);
if (trigger && *trigger) {
list = NULL;
va_start(args, trigger);
while ((data = va_arg(args, void *))) {
list = g_list_append(list, data);
}
va_end(args);
register_binding(klass, name, trigger, list);
}
}
void gnt_bindable_action_free(GntBindableAction *action)
{
g_free(action->name);
g_free(action);
}
void gnt_bindable_action_param_free(GntBindableActionParam *param)
{
g_list_free(param->list); /* XXX: There may be a leak here for string parameters */
g_free(param);
}
GntBindable * gnt_bindable_bindings_view(GntBindable *bind)
{
GntBindable *tree = GNT_BINDABLE(gnt_tree_new_with_columns(2));
GntBindableClass *klass = GNT_BINDABLE_CLASS(GNT_BINDABLE_GET_CLASS(bind));
GHashTable *hash = g_hash_table_new(g_direct_hash, g_direct_equal);
BindingView bv = {hash, GNT_TREE(tree)};
gnt_tree_set_compare_func(bv.tree, (GCompareFunc)g_utf8_collate);
g_hash_table_foreach(klass->actions, add_action, &bv);
g_hash_table_foreach(klass->bindings, add_binding, &bv);
if (GNT_TREE(tree)->list == NULL) {
gnt_widget_destroy(GNT_WIDGET(tree));
tree = NULL;
} else
gnt_tree_adjust_columns(bv.tree);
g_hash_table_destroy(hash);
return tree;
}
static void
reset_binding_window(GntBindableClass *window, gpointer k)
{
GntBindableClass *klass = GNT_BINDABLE_CLASS(k);
klass->help_window = NULL;
}
gboolean
gnt_bindable_build_help_window(GntBindable *bindable)
{
GntWidget *tree;
GntBindableClass *klass = GNT_BINDABLE_GET_CLASS(bindable);
char *title;
tree = GNT_WIDGET(gnt_bindable_bindings_view(bindable));
klass->help_window = GNT_BINDABLE(gnt_window_new());
title = g_strdup_printf("Bindings for %s", g_type_name(G_OBJECT_TYPE(bindable)));
gnt_box_set_title(GNT_BOX(klass->help_window), title);
if (tree) {
g_signal_connect(G_OBJECT(tree), "activate", G_CALLBACK(gnt_bindable_rebinding_activate), bindable);
gnt_box_add_widget(GNT_BOX(klass->help_window), tree);
} else
gnt_box_add_widget(GNT_BOX(klass->help_window), gnt_label_new("This widget has no customizable bindings."));
g_signal_connect(G_OBJECT(klass->help_window), "destroy", G_CALLBACK(reset_binding_window), klass);
gnt_widget_show(GNT_WIDGET(klass->help_window));
g_free(title);
return TRUE;
}