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-rw-r--r--grub-core/gfxmenu/gui_label.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/grub-core/gfxmenu/gui_label.c b/grub-core/gfxmenu/gui_label.c
new file mode 100644
index 0000000..1c19054
--- /dev/null
+++ b/grub-core/gfxmenu/gui_label.c
@@ -0,0 +1,277 @@
+/* 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>
+#include <grub/color.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));
+}
+
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+
+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. */
+
+ if (grub_printf_fmt_check(value, "%d") != GRUB_ERR_NONE)
+ value = ""; /* Unsupported format. */
+
+ 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;
+}
+
+#pragma GCC diagnostic error "-Wformat-nonliteral"
+
+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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