qulogic/libgnt

Make C_ a bit easier to read.

2019-10-03, Gary Kramlich
a94fe28b9ca7
Make C_ a bit easier to read.
/*
* 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"
#include "gntbox.h"
#include "gntcombobox.h"
#include "gnttree.h"
#include "gnttreeprivate.h"
#include "gntstyle.h"
#include "gntutils.h"
#include "gntwidgetprivate.h"
#include <string.h>
struct _GntComboBox
{
GntWidget parent;
GntWidget *dropdown; /* This is a GntTree */
gpointer selected; /* Currently selected key */
};
enum
{
SIG_SELECTION_CHANGED,
SIGS,
};
static guint signals[SIGS] = { 0 };
static void (*widget_lost_focus)(GntWidget *widget);
G_DEFINE_TYPE(GntComboBox, gnt_combo_box, GNT_TYPE_WIDGET)
static void
set_selection(GntComboBox *box, gpointer key)
{
if (box->selected != key)
{
/* XXX: make sure the key actually does exist */
gpointer old = box->selected;
box->selected = key;
if (gnt_widget_get_window(GNT_WIDGET(box))) {
gnt_widget_draw(GNT_WIDGET(box));
}
if (box->dropdown)
gnt_tree_set_selected(GNT_TREE(box->dropdown), key);
g_signal_emit(box, signals[SIG_SELECTION_CHANGED], 0, old, key);
}
}
static void
hide_popup(GntComboBox *box, gboolean set)
{
gint width, height;
gnt_widget_get_internal_size(box->dropdown, &width, &height);
gnt_widget_set_size(box->dropdown, width - 1, height);
if (set)
set_selection(box, gnt_tree_get_selection_data(GNT_TREE(box->dropdown)));
else
gnt_tree_set_selected(GNT_TREE(box->dropdown), box->selected);
gnt_widget_hide(gnt_widget_get_parent(box->dropdown));
}
static void
gnt_combo_box_draw(GntWidget *widget)
{
GntComboBox *box = GNT_COMBO_BOX(widget);
WINDOW *window = gnt_widget_get_window(widget);
char *text = NULL, *s;
GntColorType type;
gint width;
int len;
if (box->dropdown && box->selected)
text = gnt_tree_get_selection_text(GNT_TREE(box->dropdown));
if (text == NULL)
text = g_strdup("");
if (gnt_widget_has_focus(widget))
type = GNT_COLOR_HIGHLIGHT;
else
type = GNT_COLOR_NORMAL;
wbkgdset(window, '\0' | gnt_color_pair(type));
gnt_widget_get_internal_size(widget, &width, NULL);
s = (char *)gnt_util_onscreen_width_to_pointer(text, width - 4, &len);
*s = '\0';
mvwaddstr(window, 1, 1, C_(text));
whline(window, ' ' | gnt_color_pair(type), width - 4 - len);
mvwaddch(window, 1, width - 3,
ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL));
mvwaddch(window, 1, width - 2,
ACS_DARROW | gnt_color_pair(GNT_COLOR_NORMAL));
(void)wmove(window, 1, 1);
g_free(text);
}
static void
gnt_combo_box_size_request(GntWidget *widget)
{
if (!gnt_widget_get_mapped(widget)) {
GntWidget *dd = GNT_COMBO_BOX(widget)->dropdown;
gint width;
gnt_widget_size_request(dd);
gnt_widget_get_internal_size(dd, &width, NULL);
/* For now, a combobox will have border */
gnt_widget_set_internal_size(widget, MAX(10, width + 2), 3);
}
}
static void
gnt_combo_box_map(GntWidget *widget)
{
gint width, height;
gnt_widget_get_internal_size(widget, &width, &height);
if (width == 0 || height == 0) {
gnt_widget_size_request(widget);
}
}
static void
popup_dropdown(GntComboBox *box)
{
GntWidget *widget = GNT_WIDGET(box);
GntWidget *parent = gnt_widget_get_parent(box->dropdown);
WINDOW *window;
gint widgetx, widgety, widgetwidth, widgetheight;
gint height;
gint y;
gnt_widget_get_position(widget, &widgetx, &widgety);
gnt_widget_get_internal_size(widget, &widgetwidth, &widgetheight);
height = g_list_length(gnt_tree_get_rows(GNT_TREE(box->dropdown)));
y = widgety + widgetheight - 1;
gnt_widget_set_size(box->dropdown, widgetwidth, height + 2);
if (y + height + 2 >= getmaxy(stdscr))
y = widgety - height - 1;
gnt_widget_set_position(parent, widgetx, y);
window = gnt_widget_get_window(parent);
if (window) {
mvwin(window, y, widgetx);
wresize(window, height + 2, widgetwidth);
}
gnt_widget_set_internal_size(parent, widgetwidth, height + 2);
gnt_widget_set_visible(parent, TRUE);
gnt_widget_draw(parent);
}
static gboolean
gnt_combo_box_key_pressed(GntWidget *widget, const char *text)
{
GntComboBox *box = GNT_COMBO_BOX(widget);
gboolean showing;
showing = gnt_widget_get_mapped(gnt_widget_get_parent(box->dropdown));
if (showing) {
if (text[1] == 0) {
switch (text[0]) {
case '\r':
case '\t':
case '\n':
hide_popup(box, TRUE);
return TRUE;
case 27:
hide_popup(box, FALSE);
return TRUE;
}
}
}
if (gnt_widget_key_pressed(box->dropdown, text)) {
if (!showing)
popup_dropdown(box);
return TRUE;
}
{
#define SEARCH_IN_RANGE(start, end) do { \
GntTreeRow *row; \
for (row = start; row != end; \
row = gnt_tree_row_get_next(tree, row)) { \
gpointer key = gnt_tree_row_get_key(tree, row); \
GList *list = gnt_tree_get_row_text_list(tree, key); \
gboolean found = FALSE; \
found = (list->data && g_ascii_strncasecmp(text, list->data, len) == 0); \
g_list_free_full(list, g_free); \
if (found) { \
if (!showing) \
popup_dropdown(box); \
gnt_tree_set_selected(tree, key); \
return TRUE; \
} \
} \
} while (0)
int len = strlen(text);
GntTree *tree = GNT_TREE(box->dropdown);
GntTreeRow *current = gnt_tree_get_current(tree);
SEARCH_IN_RANGE(gnt_tree_row_get_next(tree, current), NULL);
SEARCH_IN_RANGE(gnt_tree_get_top(tree), current);
#undef SEARCH_IN_RANGE
}
return FALSE;
}
static void
gnt_combo_box_destroy(GntWidget *widget)
{
GntComboBox *combo = GNT_COMBO_BOX(widget);
gnt_widget_destroy(gnt_widget_get_parent(combo->dropdown));
}
static void
gnt_combo_box_lost_focus(GntWidget *widget)
{
GntComboBox *combo = GNT_COMBO_BOX(widget);
if (gnt_widget_get_mapped(gnt_widget_get_parent(combo->dropdown))) {
hide_popup(combo, FALSE);
}
widget_lost_focus(widget);
}
static gboolean
gnt_combo_box_clicked(GntWidget *widget, GntMouseEvent event,
G_GNUC_UNUSED int x, G_GNUC_UNUSED int y)
{
GntComboBox *box = GNT_COMBO_BOX(widget);
gboolean dshowing;
dshowing = gnt_widget_get_mapped(gnt_widget_get_parent(box->dropdown));
if (event == GNT_MOUSE_SCROLL_UP) {
if (dshowing)
gnt_widget_key_pressed(box->dropdown, GNT_KEY_UP);
} else if (event == GNT_MOUSE_SCROLL_DOWN) {
if (dshowing)
gnt_widget_key_pressed(box->dropdown, GNT_KEY_DOWN);
} else if (event == GNT_LEFT_MOUSE_DOWN) {
if (dshowing) {
hide_popup(box, TRUE);
} else {
popup_dropdown(GNT_COMBO_BOX(widget));
}
} else
return FALSE;
return TRUE;
}
static void
gnt_combo_box_size_changed(GntWidget *widget, G_GNUC_UNUSED int oldw,
G_GNUC_UNUSED int oldh)
{
GntComboBox *box = GNT_COMBO_BOX(widget);
gint width, height;
gnt_widget_get_internal_size(widget, &width, NULL);
gnt_widget_get_internal_size(box->dropdown, NULL, &height);
gnt_widget_set_size(box->dropdown, width - 1, height);
}
static gboolean
dropdown_menu(GntBindable *b, G_GNUC_UNUSED GList *params)
{
GntComboBox *combo = GNT_COMBO_BOX(b);
if (gnt_widget_get_mapped(gnt_widget_get_parent(combo->dropdown))) {
return FALSE;
}
popup_dropdown(combo);
return TRUE;
}
static void
gnt_combo_box_class_init(GntComboBoxClass *klass)
{
GntBindableClass *bindable = GNT_BINDABLE_CLASS(klass);
GntWidgetClass *widget_class = GNT_WIDGET_CLASS(klass);
widget_class->destroy = gnt_combo_box_destroy;
widget_class->draw = gnt_combo_box_draw;
widget_class->map = gnt_combo_box_map;
widget_class->size_request = gnt_combo_box_size_request;
widget_class->key_pressed = gnt_combo_box_key_pressed;
widget_class->clicked = gnt_combo_box_clicked;
widget_class->size_changed = gnt_combo_box_size_changed;
widget_lost_focus = widget_class->lost_focus;
widget_class->lost_focus = gnt_combo_box_lost_focus;
signals[SIG_SELECTION_CHANGED] =
g_signal_new("selection-changed",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 2, G_TYPE_POINTER, G_TYPE_POINTER);
gnt_bindable_class_register_action(bindable, "dropdown", dropdown_menu,
GNT_KEY_DOWN, NULL);
gnt_bindable_register_binding(bindable, "dropdown", GNT_KEY_UP, NULL);
gnt_style_read_actions(G_OBJECT_CLASS_TYPE(klass), bindable);
}
static void
gnt_combo_box_init(GntComboBox *combo)
{
GntWidget *widget = GNT_WIDGET(combo);
GntWidget *box;
gnt_widget_set_grow_x(widget, TRUE);
gnt_widget_set_take_focus(widget, TRUE);
gnt_widget_set_has_shadow(widget, FALSE);
combo->dropdown = gnt_tree_new();
box = gnt_box_new(FALSE, FALSE);
gnt_widget_set_has_shadow(box, FALSE);
gnt_widget_set_has_border(box, FALSE);
gnt_widget_set_transient(box, TRUE);
gnt_box_set_pad(GNT_BOX(box), 0);
gnt_box_add_widget(GNT_BOX(box), combo->dropdown);
gnt_widget_set_minimum_size(widget, 4, 3);
}
/******************************************************************************
* GntComboBox API
*****************************************************************************/
GntWidget *gnt_combo_box_new()
{
GntWidget *widget = g_object_new(GNT_TYPE_COMBO_BOX, NULL);
return widget;
}
GntWidget *
gnt_combo_box_get_dropdown(GntComboBox *box)
{
g_return_val_if_fail(GNT_IS_BOX(box), NULL);
return box->dropdown;
}
void gnt_combo_box_add_data(GntComboBox *box, gpointer key, const char *text)
{
gnt_tree_add_row_last(GNT_TREE(box->dropdown), key,
gnt_tree_create_row(GNT_TREE(box->dropdown), text), NULL);
if (box->selected == NULL)
set_selection(box, key);
}
gpointer gnt_combo_box_get_selected_data(GntComboBox *box)
{
return box->selected;
}
void gnt_combo_box_set_selected(GntComboBox *box, gpointer key)
{
set_selection(box, key);
}
void gnt_combo_box_remove(GntComboBox *box, gpointer key)
{
gnt_tree_remove(GNT_TREE(box->dropdown), key);
if (box->selected == key)
set_selection(box, NULL);
}
void gnt_combo_box_remove_all(GntComboBox *box)
{
gnt_tree_remove_all(GNT_TREE(box->dropdown));
set_selection(box, NULL);
}