blob: 637578f77a702fc5b673207c589e54dbd2532c64 [file] [log] [blame]
/* 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>
#include <grub/i18n.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_video_rgba_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. */
if (left_x < 0 || left_x > (int) self->bounds.width)
left_x = 0;
grub_video_rect_t vpsave;
grub_gui_set_viewport (&self->bounds, &vpsave);
grub_font_draw_string (self->text,
self->font,
grub_video_map_rgba_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
{
if (grub_strcmp (value, "@KEYMAP_LONG@") == 0)
value = _("Press enter to boot the selected OS, "
"`e' to edit the commands before booting "
"or `c' for a command-line. ESC to return previous menu.");
else if (grub_strcmp (value, "@KEYMAP_MIDDLE@") == 0)
value = _("Press enter to boot the selected OS, "
"`e' to edit the commands before booting "
"or `c' for a command-line.");
else if (grub_strcmp (value, "@KEYMAP_SHORT@") == 0)
value = _("enter: boot, `e': options, `c': cmd-line");
/* FIXME: Add more templates here if needed. */
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_video_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;
}