268 lines
6.9 KiB
C
268 lines
6.9 KiB
C
/* gui_label.c - GUI component to display a line of text. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/gui.h>
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#include <grub/font.h>
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#include <grub/gui_string_util.h>
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#include <grub/i18n.h>
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static const char *align_options[] =
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{
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"left",
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"center",
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"right",
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0
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};
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enum align_mode {
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align_left,
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align_center,
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align_right
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};
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struct grub_gui_label
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{
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struct grub_gui_component comp;
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grub_gui_container_t parent;
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grub_video_rect_t bounds;
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char *id;
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int visible;
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char *text;
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char *template;
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grub_font_t font;
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grub_video_rgba_color_t color;
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int value;
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enum align_mode align;
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};
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typedef struct grub_gui_label *grub_gui_label_t;
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static void
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label_destroy (void *vself)
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{
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grub_gui_label_t self = vself;
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grub_gfxmenu_timeout_unregister ((grub_gui_component_t) self);
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grub_free (self->text);
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grub_free (self->template);
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grub_free (self);
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}
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static const char *
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label_get_id (void *vself)
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{
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grub_gui_label_t self = vself;
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return self->id;
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}
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static int
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label_is_instance (void *vself __attribute__((unused)), const char *type)
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{
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return grub_strcmp (type, "component") == 0;
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}
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static void
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label_paint (void *vself, const grub_video_rect_t *region)
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{
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grub_gui_label_t self = vself;
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if (! self->visible)
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return;
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if (!grub_video_have_common_points (region, &self->bounds))
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return;
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/* Calculate the starting x coordinate. */
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int left_x;
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if (self->align == align_left)
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left_x = 0;
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else if (self->align == align_center)
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left_x = (self->bounds.width
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- grub_font_get_string_width (self->font, self->text)) / 2;
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else if (self->align == align_right)
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left_x = (self->bounds.width
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- grub_font_get_string_width (self->font, self->text));
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else
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return; /* Invalid alignment. */
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if (left_x < 0 || left_x > (int) self->bounds.width)
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left_x = 0;
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grub_video_rect_t vpsave;
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grub_gui_set_viewport (&self->bounds, &vpsave);
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grub_font_draw_string (self->text,
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self->font,
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grub_video_map_rgba_color (self->color),
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left_x,
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grub_font_get_ascent (self->font));
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grub_gui_restore_viewport (&vpsave);
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}
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static void
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label_set_parent (void *vself, grub_gui_container_t parent)
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{
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grub_gui_label_t self = vself;
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self->parent = parent;
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}
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static grub_gui_container_t
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label_get_parent (void *vself)
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{
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grub_gui_label_t self = vself;
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return self->parent;
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}
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static void
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label_set_bounds (void *vself, const grub_video_rect_t *bounds)
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{
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grub_gui_label_t self = vself;
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self->bounds = *bounds;
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}
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static void
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label_get_bounds (void *vself, grub_video_rect_t *bounds)
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{
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grub_gui_label_t self = vself;
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*bounds = self->bounds;
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}
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static void
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label_get_minimal_size (void *vself, unsigned *width, unsigned *height)
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{
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grub_gui_label_t self = vself;
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*width = grub_font_get_string_width (self->font, self->text);
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*height = (grub_font_get_ascent (self->font)
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+ grub_font_get_descent (self->font));
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}
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static void
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label_set_state (void *vself, int visible, int start __attribute__ ((unused)),
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int current, int end __attribute__ ((unused)))
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{
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grub_gui_label_t self = vself;
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self->value = -current;
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self->visible = visible;
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grub_free (self->text);
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self->text = grub_xasprintf (self->template ? : "%d", self->value);
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}
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static grub_err_t
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label_set_property (void *vself, const char *name, const char *value)
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{
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grub_gui_label_t self = vself;
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if (grub_strcmp (name, "text") == 0)
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{
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grub_free (self->text);
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grub_free (self->template);
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if (! value)
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{
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self->template = NULL;
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self->text = grub_strdup ("");
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}
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else
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{
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if (grub_strcmp (value, "@KEYMAP_LONG@") == 0)
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value = _("Press enter to boot the selected OS, "
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"\'e\' to edit the commands before booting "
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"or \'c\' for a command-line. ESC to return previous menu.");
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else if (grub_strcmp (value, "@KEYMAP_MIDDLE@") == 0)
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value = _("Press enter to boot the selected OS, "
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"\'e\' to edit the commands before booting "
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"or \'c\' for a command-line.");
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else if (grub_strcmp (value, "@KEYMAP_SHORT@") == 0)
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value = _("enter: boot, \'e\': options, \'c\': cmd-line");
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/* FIXME: Add more templates here if needed. */
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self->template = grub_strdup (value);
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self->text = grub_xasprintf (value, self->value);
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}
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}
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else if (grub_strcmp (name, "font") == 0)
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{
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self->font = grub_font_get (value);
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}
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else if (grub_strcmp (name, "color") == 0)
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{
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grub_video_parse_color (value, &self->color);
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}
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else if (grub_strcmp (name, "align") == 0)
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{
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int i;
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for (i = 0; align_options[i]; i++)
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{
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if (grub_strcmp (align_options[i], value) == 0)
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{
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self->align = i; /* Set the alignment mode. */
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break;
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}
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}
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}
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else if (grub_strcmp (name, "visible") == 0)
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{
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self->visible = grub_strcmp (value, "false") != 0;
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}
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else if (grub_strcmp (name, "id") == 0)
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{
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grub_gfxmenu_timeout_unregister ((grub_gui_component_t) self);
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grub_free (self->id);
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if (value)
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self->id = grub_strdup (value);
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else
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self->id = 0;
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if (self->id && grub_strcmp (self->id, GRUB_GFXMENU_TIMEOUT_COMPONENT_ID)
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== 0)
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grub_gfxmenu_timeout_register ((grub_gui_component_t) self,
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label_set_state);
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}
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return GRUB_ERR_NONE;
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}
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static struct grub_gui_component_ops label_ops =
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{
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.destroy = label_destroy,
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.get_id = label_get_id,
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.is_instance = label_is_instance,
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.paint = label_paint,
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.set_parent = label_set_parent,
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.get_parent = label_get_parent,
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.set_bounds = label_set_bounds,
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.get_bounds = label_get_bounds,
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.get_minimal_size = label_get_minimal_size,
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.set_property = label_set_property
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};
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grub_gui_component_t
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grub_gui_label_new (void)
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{
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grub_gui_label_t label;
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label = grub_zalloc (sizeof (*label));
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if (! label)
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return 0;
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label->comp.ops = &label_ops;
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label->visible = 1;
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label->text = grub_strdup ("");
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label->font = grub_font_get ("Unknown Regular 16");
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label->color.red = 0;
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label->color.green = 0;
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label->color.blue = 0;
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label->color.alpha = 255;
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label->align = align_left;
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return (grub_gui_component_t) label;
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}
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