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 "gntinternal.h"
#undef GNT_LOG_DOMAIN
#define GNT_LOG_DOMAIN "Colors"
#include "gntcolors.h"
#include "gntstyle.h"
#include <glib.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
static gboolean hascolors;
static int custom_type = GNT_COLORS;
static struct
{
short r, g, b;
} colors[GNT_TOTAL_COLORS];
static void
backup_colors(void)
{
short i;
for (i = 0; i < GNT_TOTAL_COLORS; i++)
{
color_content(i, &colors[i].r,
&colors[i].g, &colors[i].b);
}
}
static gboolean
can_use_custom_color(void)
{
return (gnt_style_get_bool(GNT_STYLE_COLOR, FALSE) && can_change_color());
}
static void
restore_colors(void)
{
short i;
for (i = 0; i < GNT_TOTAL_COLORS; i++)
{
init_color(i, colors[i].r,
colors[i].g, colors[i].b);
}
}
void gnt_init_colors()
{
static gboolean init = FALSE;
int defaults;
if (init)
return;
init = TRUE;
start_color();
if (!(hascolors = has_colors()))
return;
defaults = use_default_colors();
if (can_use_custom_color())
{
backup_colors();
/* Do some init_color()s */
init_color(GNT_COLOR_BLACK, 0, 0, 0);
init_color(GNT_COLOR_RED, 1000, 0, 0);
init_color(GNT_COLOR_GREEN, 0, 1000, 0);
init_color(GNT_COLOR_BLUE, 250, 250, 700);
init_color(GNT_COLOR_WHITE, 1000, 1000, 1000);
init_color(GNT_COLOR_GRAY, 699, 699, 699);
init_color(GNT_COLOR_DARK_GRAY, 256, 256, 256);
/* Now some init_pair()s */
init_pair(GNT_COLOR_NORMAL, GNT_COLOR_BLACK, GNT_COLOR_WHITE);
init_pair(GNT_COLOR_HIGHLIGHT, GNT_COLOR_WHITE, GNT_COLOR_BLUE);
init_pair(GNT_COLOR_SHADOW, GNT_COLOR_BLACK, GNT_COLOR_DARK_GRAY);
init_pair(GNT_COLOR_TITLE, GNT_COLOR_WHITE, GNT_COLOR_BLUE);
init_pair(GNT_COLOR_TITLE_D, GNT_COLOR_WHITE, GNT_COLOR_GRAY);
init_pair(GNT_COLOR_TEXT_NORMAL, GNT_COLOR_WHITE, GNT_COLOR_BLUE);
init_pair(GNT_COLOR_HIGHLIGHT_D, GNT_COLOR_BLACK, GNT_COLOR_GRAY);
init_pair(GNT_COLOR_DISABLED, GNT_COLOR_GRAY, GNT_COLOR_WHITE);
init_pair(GNT_COLOR_URGENT, GNT_COLOR_WHITE, GNT_COLOR_RED);
}
else
{
int bg;
if (defaults == OK) {
init_pair(GNT_COLOR_NORMAL, -1, -1);
bg = -1;
} else {
init_pair(GNT_COLOR_NORMAL, COLOR_BLACK, COLOR_WHITE);
bg = COLOR_WHITE;
}
init_pair(GNT_COLOR_DISABLED, COLOR_YELLOW, bg);
init_pair(GNT_COLOR_URGENT, COLOR_GREEN, bg);
init_pair(GNT_COLOR_HIGHLIGHT, COLOR_WHITE, COLOR_BLUE);
init_pair(GNT_COLOR_SHADOW, COLOR_BLACK, COLOR_BLACK);
init_pair(GNT_COLOR_TITLE, COLOR_WHITE, COLOR_BLUE);
init_pair(GNT_COLOR_TITLE_D, COLOR_WHITE, COLOR_BLACK);
init_pair(GNT_COLOR_TEXT_NORMAL, COLOR_WHITE, COLOR_BLUE);
init_pair(GNT_COLOR_HIGHLIGHT_D, COLOR_CYAN, COLOR_BLACK);
}
}
void
gnt_uninit_colors()
{
if (can_use_custom_color())
restore_colors();
}
int
gnt_colors_get_color(char *key)
{
int color;
gboolean custom = can_use_custom_color();
key = g_strstrip(key);
if (strcmp(key, "black") == 0)
color = custom ? GNT_COLOR_BLACK : COLOR_BLACK;
else if (strcmp(key, "red") == 0)
color = custom ? GNT_COLOR_RED : COLOR_RED;
else if (strcmp(key, "green") == 0)
color = custom ? GNT_COLOR_GREEN : COLOR_GREEN;
else if (strcmp(key, "blue") == 0)
color = custom ? GNT_COLOR_BLUE : COLOR_BLUE;
else if (strcmp(key, "white") == 0)
color = custom ? GNT_COLOR_WHITE : COLOR_WHITE;
else if (strcmp(key, "gray") == 0 || strcmp(key, "grey") == 0)
color = custom ? GNT_COLOR_GRAY : COLOR_YELLOW; /* eh? */
else if (strcmp(key, "darkgray") == 0 || strcmp(key, "darkgrey") == 0)
color = custom ? GNT_COLOR_DARK_GRAY : COLOR_BLACK;
else if (strcmp(key, "magenta") == 0)
color = COLOR_MAGENTA;
else if (strcmp(key, "cyan") == 0)
color = COLOR_CYAN;
else if (strcmp(key, "default") == 0)
color = -1;
else {
g_warning("Invalid color name: %s\n", key);
color = -EINVAL;
}
return color;
}
void gnt_colors_parse(GKeyFile *kfile)
{
GError *error = NULL;
gsize nkeys;
char **keys;
if (!g_key_file_has_group(kfile, "colors")) {
gnt_color_pairs_parse(kfile);
return;
}
keys = g_key_file_get_keys(kfile, "colors", &nkeys, &error);
if (error) {
gnt_warning("%s", error->message);
g_error_free(error);
error = NULL;
}
else if (nkeys)
{
gnt_init_colors();
while (nkeys--)
{
gsize len;
gchar *key = keys[nkeys];
char **list = g_key_file_get_string_list(kfile, "colors", key, &len, NULL);
if (len == 3)
{
int r = atoi(list[0]);
int g = atoi(list[1]);
int b = atoi(list[2]);
int color = -1;
key = g_ascii_strdown(key, -1);
color = gnt_colors_get_color(key);
g_free(key);
if (color == -EINVAL) {
g_strfreev(list);
continue;
}
init_color(color, r, g, b);
}
g_strfreev(list);
}
g_strfreev(keys);
}
gnt_color_pairs_parse(kfile);
}
void gnt_color_pairs_parse(GKeyFile *kfile)
{
GError *error = NULL;
gsize nkeys;
char **keys;
if (!g_key_file_has_group(kfile, "colorpairs"))
return;
keys = g_key_file_get_keys(kfile, "colorpairs", &nkeys, &error);
if (error)
{
gnt_warning("%s", error->message);
g_error_free(error);
return;
}
else if (nkeys)
gnt_init_colors();
while (nkeys--)
{
gsize len;
gchar *key = keys[nkeys];
char **list = g_key_file_get_string_list(kfile, "colorpairs", key, &len, NULL);
if (len == 2)
{
GntColorType type = 0;
gchar *fgc = g_ascii_strdown(list[0], -1);
gchar *bgc = g_ascii_strdown(list[1], -1);
int fg = gnt_colors_get_color(fgc);
int bg = gnt_colors_get_color(bgc);
g_free(fgc);
g_free(bgc);
if (fg == -EINVAL || bg == -EINVAL) {
g_strfreev(list);
continue;
}
key = g_ascii_strdown(key, -1);
if (strcmp(key, "normal") == 0)
type = GNT_COLOR_NORMAL;
else if (strcmp(key, "highlight") == 0)
type = GNT_COLOR_HIGHLIGHT;
else if (strcmp(key, "highlightd") == 0)
type = GNT_COLOR_HIGHLIGHT_D;
else if (strcmp(key, "shadow") == 0)
type = GNT_COLOR_SHADOW;
else if (strcmp(key, "title") == 0)
type = GNT_COLOR_TITLE;
else if (strcmp(key, "titled") == 0)
type = GNT_COLOR_TITLE_D;
else if (strcmp(key, "text") == 0)
type = GNT_COLOR_TEXT_NORMAL;
else if (strcmp(key, "disabled") == 0)
type = GNT_COLOR_DISABLED;
else if (strcmp(key, "urgent") == 0)
type = GNT_COLOR_URGENT;
else {
g_strfreev(list);
g_free(key);
continue;
}
g_free(key);
init_pair(type, fg, bg);
}
g_strfreev(list);
}
g_strfreev(keys);
}
int gnt_color_pair(int pair)
{
return (hascolors ? COLOR_PAIR(pair) :
((pair == GNT_COLOR_NORMAL || pair == GNT_COLOR_HIGHLIGHT_D ||
pair == GNT_COLOR_TITLE_D || pair == GNT_COLOR_DISABLED) ? 0 : (int)A_STANDOUT));
}
int gnt_color_add_pair(int fg, int bg)
{
init_pair(custom_type, fg, bg);
return custom_type++;
}