254 lines
6.2 KiB
C
254 lines
6.2 KiB
C
/* gui_label.c - GUI component to display a line of text. */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2008,2009 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/mm.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/gui.h>
|
|
#include <grub/font.h>
|
|
#include <grub/gui_string_util.h>
|
|
|
|
static const char *align_options[] =
|
|
{
|
|
"left",
|
|
"center",
|
|
"right",
|
|
0
|
|
};
|
|
|
|
enum align_mode {
|
|
align_left,
|
|
align_center,
|
|
align_right
|
|
};
|
|
|
|
struct grub_gui_label
|
|
{
|
|
struct grub_gui_component comp;
|
|
|
|
grub_gui_container_t parent;
|
|
grub_video_rect_t bounds;
|
|
char *id;
|
|
int visible;
|
|
char *text;
|
|
char *template;
|
|
grub_font_t font;
|
|
grub_gui_color_t color;
|
|
int value;
|
|
enum align_mode align;
|
|
};
|
|
|
|
typedef struct grub_gui_label *grub_gui_label_t;
|
|
|
|
static void
|
|
label_destroy (void *vself)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
grub_gfxmenu_timeout_unregister ((grub_gui_component_t) self);
|
|
grub_free (self->text);
|
|
grub_free (self->template);
|
|
grub_free (self);
|
|
}
|
|
|
|
static const char *
|
|
label_get_id (void *vself)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
return self->id;
|
|
}
|
|
|
|
static int
|
|
label_is_instance (void *vself __attribute__((unused)), const char *type)
|
|
{
|
|
return grub_strcmp (type, "component") == 0;
|
|
}
|
|
|
|
static void
|
|
label_paint (void *vself, const grub_video_rect_t *region)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
|
|
if (! self->visible)
|
|
return;
|
|
|
|
if (!grub_video_have_common_points (region, &self->bounds))
|
|
return;
|
|
|
|
/* Calculate the starting x coordinate. */
|
|
int left_x;
|
|
if (self->align == align_left)
|
|
left_x = 0;
|
|
else if (self->align == align_center)
|
|
left_x = ((self->bounds.width
|
|
- grub_font_get_string_width (self->font, self->text))
|
|
) / 2;
|
|
else if (self->align == align_right)
|
|
left_x = (self->bounds.width
|
|
- grub_font_get_string_width (self->font, self->text));
|
|
else
|
|
return; /* Invalid alignment. */
|
|
|
|
grub_video_rect_t vpsave;
|
|
grub_gui_set_viewport (&self->bounds, &vpsave);
|
|
grub_font_draw_string (self->text,
|
|
self->font,
|
|
grub_gui_map_color (self->color),
|
|
left_x,
|
|
grub_font_get_ascent (self->font));
|
|
grub_gui_restore_viewport (&vpsave);
|
|
}
|
|
|
|
static void
|
|
label_set_parent (void *vself, grub_gui_container_t parent)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
self->parent = parent;
|
|
}
|
|
|
|
static grub_gui_container_t
|
|
label_get_parent (void *vself)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
return self->parent;
|
|
}
|
|
|
|
static void
|
|
label_set_bounds (void *vself, const grub_video_rect_t *bounds)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
self->bounds = *bounds;
|
|
}
|
|
|
|
static void
|
|
label_get_bounds (void *vself, grub_video_rect_t *bounds)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
*bounds = self->bounds;
|
|
}
|
|
|
|
static void
|
|
label_get_minimal_size (void *vself, unsigned *width, unsigned *height)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
*width = grub_font_get_string_width (self->font, self->text);
|
|
*height = (grub_font_get_ascent (self->font)
|
|
+ grub_font_get_descent (self->font));
|
|
}
|
|
|
|
static void
|
|
label_set_state (void *vself, int visible, int start __attribute__ ((unused)),
|
|
int current, int end __attribute__ ((unused)))
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
self->value = -current;
|
|
self->visible = visible;
|
|
grub_free (self->text);
|
|
self->text = grub_xasprintf (self->template ? : "%d", self->value);
|
|
}
|
|
|
|
static grub_err_t
|
|
label_set_property (void *vself, const char *name, const char *value)
|
|
{
|
|
grub_gui_label_t self = vself;
|
|
if (grub_strcmp (name, "text") == 0)
|
|
{
|
|
grub_free (self->text);
|
|
grub_free (self->template);
|
|
if (! value)
|
|
{
|
|
self->template = NULL;
|
|
self->text = grub_strdup ("");
|
|
}
|
|
else
|
|
{
|
|
self->template = grub_strdup (value);
|
|
self->text = grub_xasprintf (value, self->value);
|
|
}
|
|
}
|
|
else if (grub_strcmp (name, "font") == 0)
|
|
{
|
|
self->font = grub_font_get (value);
|
|
}
|
|
else if (grub_strcmp (name, "color") == 0)
|
|
{
|
|
grub_gui_parse_color (value, &self->color);
|
|
}
|
|
else if (grub_strcmp (name, "align") == 0)
|
|
{
|
|
int i;
|
|
for (i = 0; align_options[i]; i++)
|
|
{
|
|
if (grub_strcmp (align_options[i], value) == 0)
|
|
{
|
|
self->align = i; /* Set the alignment mode. */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (grub_strcmp (name, "visible") == 0)
|
|
{
|
|
self->visible = grub_strcmp (value, "false") != 0;
|
|
}
|
|
else if (grub_strcmp (name, "id") == 0)
|
|
{
|
|
grub_gfxmenu_timeout_unregister ((grub_gui_component_t) self);
|
|
grub_free (self->id);
|
|
if (value)
|
|
self->id = grub_strdup (value);
|
|
else
|
|
self->id = 0;
|
|
if (self->id && grub_strcmp (self->id, GRUB_GFXMENU_TIMEOUT_COMPONENT_ID)
|
|
== 0)
|
|
grub_gfxmenu_timeout_register ((grub_gui_component_t) self,
|
|
label_set_state);
|
|
}
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static struct grub_gui_component_ops label_ops =
|
|
{
|
|
.destroy = label_destroy,
|
|
.get_id = label_get_id,
|
|
.is_instance = label_is_instance,
|
|
.paint = label_paint,
|
|
.set_parent = label_set_parent,
|
|
.get_parent = label_get_parent,
|
|
.set_bounds = label_set_bounds,
|
|
.get_bounds = label_get_bounds,
|
|
.get_minimal_size = label_get_minimal_size,
|
|
.set_property = label_set_property
|
|
};
|
|
|
|
grub_gui_component_t
|
|
grub_gui_label_new (void)
|
|
{
|
|
grub_gui_label_t label;
|
|
label = grub_zalloc (sizeof (*label));
|
|
if (! label)
|
|
return 0;
|
|
label->comp.ops = &label_ops;
|
|
label->visible = 1;
|
|
label->text = grub_strdup ("");
|
|
label->font = grub_font_get ("Unknown Regular 16");
|
|
label->color.red = 0;
|
|
label->color.green = 0;
|
|
label->color.blue = 0;
|
|
label->color.alpha = 255;
|
|
label->align = align_left;
|
|
return (grub_gui_component_t) label;
|
|
}
|