748 lines
19 KiB
C
748 lines
19 KiB
C
/* theme_loader.c - Theme file loader for gfxmenu. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008 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/types.h>
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#include <grub/file.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/video.h>
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#include <grub/gui_string_util.h>
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#include <grub/bitmap.h>
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#include <grub/bitmap_scale.h>
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#include <grub/gfxwidgets.h>
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#include <grub/gfxmenu_view.h>
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#include <grub/gui.h>
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/* Construct a new box widget using ABSPATTERN to find the pixmap files for
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it, storing the new box instance at *BOXPTR.
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PATTERN should be of the form: "(hd0,0)/somewhere/style*.png".
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The '*' then gets substituted with the various pixmap names that the
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box uses. */
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static grub_err_t
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recreate_box_absolute (grub_gfxmenu_box_t *boxptr, const char *abspattern)
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{
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char *prefix;
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char *suffix;
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char *star;
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grub_gfxmenu_box_t box;
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star = grub_strchr (abspattern, '*');
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if (! star)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"missing `*' in box pixmap pattern `%s'", abspattern);
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/* Prefix: Get the part before the '*'. */
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prefix = grub_malloc (star - abspattern + 1);
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if (! prefix)
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return grub_errno;
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grub_memcpy (prefix, abspattern, star - abspattern);
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prefix[star - abspattern] = '\0';
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/* Suffix: Everything after the '*' is the suffix. */
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suffix = star + 1;
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box = grub_gfxmenu_create_box (prefix, suffix);
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grub_free (prefix);
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if (! box)
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return grub_errno;
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if (*boxptr)
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(*boxptr)->destroy (*boxptr);
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*boxptr = box;
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return grub_errno;
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}
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/* Construct a new box widget using PATTERN to find the pixmap files for it,
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storing the new widget at *BOXPTR. PATTERN should be of the form:
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"somewhere/style*.png". The '*' then gets substituted with the various
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pixmap names that the widget uses.
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Important! The value of *BOXPTR must be initialized! It must either
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(1) Be 0 (a NULL pointer), or
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(2) Be a pointer to a valid 'grub_gfxmenu_box_t' instance.
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In this case, the previous instance is destroyed. */
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grub_err_t
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grub_gui_recreate_box (grub_gfxmenu_box_t *boxptr,
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const char *pattern, const char *theme_dir)
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{
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char *abspattern;
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/* Check arguments. */
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if (! pattern)
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{
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/* If no pixmap pattern is given, then just create an empty box. */
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if (*boxptr)
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(*boxptr)->destroy (*boxptr);
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*boxptr = grub_gfxmenu_create_box (0, 0);
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return grub_errno;
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}
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if (! theme_dir)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"styled box missing theme directory");
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/* Resolve to an absolute path. */
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abspattern = grub_resolve_relative_path (theme_dir, pattern);
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if (! abspattern)
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return grub_errno;
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/* Create the box. */
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recreate_box_absolute (boxptr, abspattern);
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grub_free (abspattern);
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return grub_errno;
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}
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/* Set the specified property NAME on the view to the given string VALUE.
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The caller is responsible for the lifetimes of NAME and VALUE. */
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static grub_err_t
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theme_set_string (grub_gfxmenu_view_t view,
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const char *name,
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const char *value,
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const char *theme_dir,
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const char *filename,
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int line_num,
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int col_num)
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{
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if (! grub_strcmp ("title-font", name))
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view->title_font = grub_font_get (value);
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else if (! grub_strcmp ("message-font", name))
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view->message_font = grub_font_get (value);
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else if (! grub_strcmp ("terminal-font", name))
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{
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grub_free (view->terminal_font_name);
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view->terminal_font_name = grub_strdup (value);
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if (! view->terminal_font_name)
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return grub_errno;
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}
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else if (! grub_strcmp ("title-color", name))
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grub_gui_parse_color (value, &view->title_color);
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else if (! grub_strcmp ("message-color", name))
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grub_gui_parse_color (value, &view->message_color);
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else if (! grub_strcmp ("message-bg-color", name))
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grub_gui_parse_color (value, &view->message_bg_color);
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else if (! grub_strcmp ("desktop-image", name))
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{
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struct grub_video_bitmap *raw_bitmap;
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struct grub_video_bitmap *scaled_bitmap;
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char *path;
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path = grub_resolve_relative_path (theme_dir, value);
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if (! path)
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return grub_errno;
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if (grub_video_bitmap_load (&raw_bitmap, path) != GRUB_ERR_NONE)
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{
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grub_free (path);
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return grub_errno;
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}
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grub_free(path);
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grub_video_bitmap_create_scaled (&scaled_bitmap,
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view->screen.width,
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view->screen.height,
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raw_bitmap,
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GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
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grub_video_bitmap_destroy (raw_bitmap);
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if (! scaled_bitmap)
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{
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grub_error_push ();
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return grub_error (grub_errno, "error scaling desktop image");
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}
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grub_video_bitmap_destroy (view->desktop_image);
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view->desktop_image = scaled_bitmap;
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}
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else if (! grub_strcmp ("desktop-color", name))
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grub_gui_parse_color (value, &view->desktop_color);
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else if (! grub_strcmp ("terminal-box", name))
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{
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grub_err_t err;
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err = grub_gui_recreate_box (&view->terminal_box, value, theme_dir);
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if (err != GRUB_ERR_NONE)
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return err;
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}
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else if (! grub_strcmp ("title-text", name))
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{
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grub_free (view->title_text);
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view->title_text = grub_strdup (value);
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if (! view->title_text)
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return grub_errno;
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}
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else
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{
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"%s:%d:%d unknown property `%s'",
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filename, line_num, col_num, name);
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}
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return grub_errno;
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}
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struct parsebuf
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{
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char *buf;
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int pos;
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int len;
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int line_num;
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int col_num;
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const char *filename;
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char *theme_dir;
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grub_gfxmenu_view_t view;
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};
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static int
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has_more (struct parsebuf *p)
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{
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return p->pos < p->len;
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}
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static int
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read_char (struct parsebuf *p)
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{
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if (has_more (p))
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{
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char c;
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c = p->buf[p->pos++];
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if (c == '\n')
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{
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p->line_num++;
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p->col_num = 1;
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}
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else
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{
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p->col_num++;
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}
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return c;
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}
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else
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return -1;
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}
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static int
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peek_char (struct parsebuf *p)
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{
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if (has_more (p))
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return p->buf[p->pos];
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else
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return -1;
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}
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static int
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is_whitespace (char c)
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{
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return (c == ' '
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|| c == '\t'
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|| c == '\r'
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|| c == '\n'
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|| c == '\f');
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}
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static void
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skip_whitespace (struct parsebuf *p)
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{
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while (has_more (p) && is_whitespace(peek_char (p)))
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read_char (p);
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}
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static void
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advance_to_next_line (struct parsebuf *p)
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{
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int c;
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/* Eat characters up to the newline. */
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do
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{
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c = read_char (p);
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}
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while (c != -1 && c != '\n');
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}
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static int
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is_identifier_char (int c)
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{
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return (c != -1
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&& (grub_isalpha(c)
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|| grub_isdigit(c)
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|| c == '_'
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|| c == '-'));
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}
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static char *
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read_identifier (struct parsebuf *p)
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{
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/* Index of the first character of the identifier in p->buf. */
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int start;
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/* Next index after the last character of the identifer in p->buf. */
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int end;
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skip_whitespace (p);
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/* Capture the start of the identifier. */
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start = p->pos;
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/* Scan for the end. */
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while (is_identifier_char (peek_char (p)))
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read_char (p);
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end = p->pos;
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if (end - start < 1)
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return 0;
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return grub_new_substring (p->buf, start, end);
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}
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static char *
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read_expression (struct parsebuf *p)
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{
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int start;
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int end;
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skip_whitespace (p);
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if (peek_char (p) == '"')
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{
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/* Read as a quoted string.
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The quotation marks are not included in the expression value. */
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/* Skip opening quotation mark. */
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read_char (p);
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start = p->pos;
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while (has_more (p) && peek_char (p) != '"')
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read_char (p);
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end = p->pos;
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/* Skip the terminating quotation mark. */
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read_char (p);
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}
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else if (peek_char (p) == '(')
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{
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/* Read as a parenthesized string -- for tuples/coordinates. */
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/* The parentheses are included in the expression value. */
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int c;
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start = p->pos;
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do
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{
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c = read_char (p);
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}
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while (c != -1 && c != ')');
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end = p->pos;
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}
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else if (has_more (p))
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{
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/* Read as a single word -- for numeric values or words without
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whitespace. */
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start = p->pos;
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while (has_more (p) && ! is_whitespace (peek_char (p)))
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read_char (p);
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end = p->pos;
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}
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else
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{
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/* The end of the theme file has been reached. */
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grub_error (GRUB_ERR_IO, "%s:%d:%d expression expected in theme file",
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p->filename, p->line_num, p->col_num);
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return 0;
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}
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return grub_new_substring (p->buf, start, end);
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}
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|
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/* Read a GUI object specification from the theme file.
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Any components created will be added to the GUI container PARENT. */
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static grub_err_t
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read_object (struct parsebuf *p, grub_gui_container_t parent)
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{
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grub_video_rect_t bounds;
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char *name;
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name = read_identifier (p);
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if (! name)
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goto cleanup;
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|
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grub_gui_component_t component = 0;
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if (grub_strcmp (name, "label") == 0)
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{
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component = grub_gui_label_new ();
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}
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else if (grub_strcmp (name, "image") == 0)
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{
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component = grub_gui_image_new ();
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}
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else if (grub_strcmp (name, "vbox") == 0)
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{
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component = (grub_gui_component_t) grub_gui_vbox_new ();
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}
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else if (grub_strcmp (name, "hbox") == 0)
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{
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component = (grub_gui_component_t) grub_gui_hbox_new ();
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}
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else if (grub_strcmp (name, "canvas") == 0)
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{
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component = (grub_gui_component_t) grub_gui_canvas_new ();
|
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}
|
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else if (grub_strcmp (name, "progress_bar") == 0)
|
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{
|
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component = grub_gui_progress_bar_new ();
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}
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else if (grub_strcmp (name, "circular_progress") == 0)
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{
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component = grub_gui_circular_progress_new ();
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}
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else if (grub_strcmp (name, "boot_menu") == 0)
|
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{
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component = grub_gui_list_new ();
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}
|
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else
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{
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/* Unknown type. */
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grub_error (GRUB_ERR_IO, "%s:%d:%d unknown object type `%s'",
|
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p->filename, p->line_num, p->col_num, name);
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goto cleanup;
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}
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|
|
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if (! component)
|
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goto cleanup;
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|
|
/* Inform the component about the theme so it can find its resources. */
|
|
component->ops->set_property (component, "theme_dir", p->theme_dir);
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component->ops->set_property (component, "theme_path", p->filename);
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|
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/* Add the component as a child of PARENT. */
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bounds.x = 0;
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bounds.y = 0;
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bounds.width = -1;
|
|
bounds.height = -1;
|
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component->ops->set_bounds (component, &bounds);
|
|
parent->ops->add (parent, component);
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|
|
|
skip_whitespace (p);
|
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if (read_char (p) != '{')
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{
|
|
grub_error (GRUB_ERR_IO,
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"%s:%d:%d expected `{' after object type name `%s'",
|
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p->filename, p->line_num, p->col_num, name);
|
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goto cleanup;
|
|
}
|
|
|
|
while (has_more (p))
|
|
{
|
|
skip_whitespace (p);
|
|
|
|
/* Check whether the end has been encountered. */
|
|
if (peek_char (p) == '}')
|
|
{
|
|
/* Skip the closing brace. */
|
|
read_char (p);
|
|
break;
|
|
}
|
|
|
|
if (peek_char (p) == '#')
|
|
{
|
|
/* Skip comments. */
|
|
advance_to_next_line (p);
|
|
continue;
|
|
}
|
|
|
|
if (peek_char (p) == '+')
|
|
{
|
|
/* Skip the '+'. */
|
|
read_char (p);
|
|
|
|
/* Check whether this component is a container. */
|
|
if (component->ops->is_instance (component, "container"))
|
|
{
|
|
/* Read the sub-object recursively and add it as a child. */
|
|
if (read_object (p, (grub_gui_container_t) component) != 0)
|
|
goto cleanup;
|
|
/* After reading the sub-object, resume parsing, expecting
|
|
another property assignment or sub-object definition. */
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
grub_error (GRUB_ERR_IO,
|
|
"%s:%d:%d attempted to add object to non-container",
|
|
p->filename, p->line_num, p->col_num);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
char *property;
|
|
property = read_identifier (p);
|
|
if (! property)
|
|
{
|
|
grub_error (GRUB_ERR_IO, "%s:%d:%d identifier expected in theme file",
|
|
p->filename, p->line_num, p->col_num);
|
|
goto cleanup;
|
|
}
|
|
|
|
skip_whitespace (p);
|
|
if (read_char (p) != '=')
|
|
{
|
|
grub_error (GRUB_ERR_IO,
|
|
"%s:%d:%d expected `=' after property name `%s'",
|
|
p->filename, p->line_num, p->col_num, property);
|
|
grub_free (property);
|
|
goto cleanup;
|
|
}
|
|
skip_whitespace (p);
|
|
|
|
char *value;
|
|
value = read_expression (p);
|
|
if (! value)
|
|
{
|
|
grub_free (property);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Handle the property value. */
|
|
if (grub_strcmp (property, "left") == 0)
|
|
{
|
|
unsigned num;
|
|
char *ptr;
|
|
num = grub_strtoul (value, &ptr, 0);
|
|
if (*ptr == '%')
|
|
{
|
|
component->isxfrac = 1;
|
|
component->xfrac
|
|
= grub_fixed_fuf_divide (grub_unsigned_to_fixed (num), 100);
|
|
}
|
|
else
|
|
{
|
|
component->isxfrac = 0;
|
|
component->x = num;
|
|
}
|
|
}
|
|
else if (grub_strcmp (property, "top") == 0)
|
|
{
|
|
unsigned num;
|
|
char *ptr;
|
|
num = grub_strtoul (value, &ptr, 0);
|
|
if (*ptr == '%')
|
|
{
|
|
component->isyfrac = 1;
|
|
component->yfrac
|
|
= grub_fixed_fuf_divide (grub_unsigned_to_fixed (num), 100);
|
|
}
|
|
else
|
|
{
|
|
component->isyfrac = 0;
|
|
component->y = num;
|
|
}
|
|
}
|
|
else if (grub_strcmp (property, "width") == 0)
|
|
{
|
|
unsigned num;
|
|
char *ptr;
|
|
num = grub_strtoul (value, &ptr, 0);
|
|
if (*ptr == '%')
|
|
{
|
|
component->iswfrac = 1;
|
|
component->wfrac
|
|
= grub_fixed_fuf_divide (grub_unsigned_to_fixed (num), 100);
|
|
}
|
|
else
|
|
{
|
|
component->iswfrac = 0;
|
|
component->w = num;
|
|
}
|
|
}
|
|
else if (grub_strcmp (property, "height") == 0)
|
|
{
|
|
unsigned num;
|
|
char *ptr;
|
|
num = grub_strtoul (value, &ptr, 0);
|
|
if (*ptr == '%')
|
|
{
|
|
component->ishfrac = 1;
|
|
component->hfrac
|
|
= grub_fixed_fuf_divide (grub_unsigned_to_fixed (num), 100);
|
|
}
|
|
else
|
|
{
|
|
component->ishfrac = 0;
|
|
component->h = num;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* General property handling. */
|
|
component->ops->set_property (component, property, value);
|
|
}
|
|
|
|
grub_free (value);
|
|
grub_free (property);
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
grub_free (name);
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_err_t
|
|
read_property (struct parsebuf *p)
|
|
{
|
|
char *name;
|
|
|
|
/* Read the property name. */
|
|
name = read_identifier (p);
|
|
if (! name)
|
|
{
|
|
advance_to_next_line (p);
|
|
return grub_errno;
|
|
}
|
|
|
|
/* Skip whitespace before separator. */
|
|
skip_whitespace (p);
|
|
|
|
/* Read separator. */
|
|
if (read_char (p) != ':')
|
|
{
|
|
grub_error (GRUB_ERR_IO,
|
|
"%s:%d:%d missing separator after property name `%s'",
|
|
p->filename, p->line_num, p->col_num, name);
|
|
goto done;
|
|
}
|
|
|
|
/* Skip whitespace after separator. */
|
|
skip_whitespace (p);
|
|
|
|
/* Get the value based on its type. */
|
|
if (peek_char (p) == '"')
|
|
{
|
|
/* String value (e.g., '"My string"'). */
|
|
char *value = read_expression (p);
|
|
if (! value)
|
|
{
|
|
grub_error (GRUB_ERR_IO, "%s:%d:%d missing property value",
|
|
p->filename, p->line_num, p->col_num);
|
|
goto done;
|
|
}
|
|
/* If theme_set_string results in an error, grub_errno will be returned
|
|
below. */
|
|
theme_set_string (p->view, name, value, p->theme_dir,
|
|
p->filename, p->line_num, p->col_num);
|
|
grub_free (value);
|
|
}
|
|
else
|
|
{
|
|
grub_error (GRUB_ERR_IO,
|
|
"%s:%d:%d property value invalid; "
|
|
"enclose literal values in quotes (\")",
|
|
p->filename, p->line_num, p->col_num);
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
grub_free (name);
|
|
return grub_errno;
|
|
}
|
|
|
|
/* Set properties on the view based on settings from the specified
|
|
theme file. */
|
|
grub_err_t
|
|
grub_gfxmenu_view_load_theme (grub_gfxmenu_view_t view, const char *theme_path)
|
|
{
|
|
grub_file_t file;
|
|
struct parsebuf p;
|
|
|
|
p.view = view;
|
|
p.theme_dir = grub_get_dirname (theme_path);
|
|
|
|
file = grub_file_open (theme_path);
|
|
if (! file)
|
|
{
|
|
grub_free (p.theme_dir);
|
|
return grub_errno;
|
|
}
|
|
|
|
p.len = grub_file_size (file);
|
|
p.buf = grub_malloc (p.len);
|
|
p.pos = 0;
|
|
p.line_num = 1;
|
|
p.col_num = 1;
|
|
p.filename = theme_path;
|
|
if (! p.buf)
|
|
{
|
|
grub_file_close (file);
|
|
grub_free (p.theme_dir);
|
|
return grub_errno;
|
|
}
|
|
if (grub_file_read (file, p.buf, p.len) != p.len)
|
|
{
|
|
grub_free (p.buf);
|
|
grub_file_close (file);
|
|
grub_free (p.theme_dir);
|
|
return grub_errno;
|
|
}
|
|
|
|
if (view->canvas)
|
|
view->canvas->component.ops->destroy (view->canvas);
|
|
|
|
view->canvas = grub_gui_canvas_new ();
|
|
((grub_gui_component_t) view->canvas)
|
|
->ops->set_bounds ((grub_gui_component_t) view->canvas,
|
|
&view->screen);
|
|
|
|
while (has_more (&p))
|
|
{
|
|
/* Skip comments (lines beginning with #). */
|
|
if (peek_char (&p) == '#')
|
|
{
|
|
advance_to_next_line (&p);
|
|
continue;
|
|
}
|
|
|
|
/* Find the first non-whitespace character. */
|
|
skip_whitespace (&p);
|
|
|
|
/* Handle the content. */
|
|
if (peek_char (&p) == '+')
|
|
{
|
|
/* Skip the '+'. */
|
|
read_char (&p);
|
|
read_object (&p, view->canvas);
|
|
}
|
|
else
|
|
{
|
|
read_property (&p);
|
|
}
|
|
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
goto fail;
|
|
}
|
|
|
|
/* Set the new theme path. */
|
|
grub_free (view->theme_path);
|
|
view->theme_path = grub_strdup (theme_path);
|
|
goto cleanup;
|
|
|
|
fail:
|
|
if (view->canvas)
|
|
{
|
|
view->canvas->component.ops->destroy (view->canvas);
|
|
view->canvas = 0;
|
|
}
|
|
|
|
cleanup:
|
|
grub_free (p.buf);
|
|
grub_file_close (file);
|
|
grub_free (p.theme_dir);
|
|
return grub_errno;
|
|
}
|