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- /* 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;
- }
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