Restore and enhance pager functionality
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
6fcebedeed
commit
3c69fb81e1
3 changed files with 316 additions and 151 deletions
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@ -113,7 +113,6 @@ void read_terminal_list (void);
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void grub_set_more (int onoff);
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int grub_normal_get_char_counter (void);
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void grub_install_newline_hook (void);
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void grub_xputs_normal (const char *str);
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@ -661,7 +661,6 @@ GRUB_MOD_INIT(normal)
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grub_set_history (GRUB_DEFAULT_HISTORY_SIZE);
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grub_install_newline_hook ();
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grub_register_variable_hook ("pager", 0, grub_env_write_pager);
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/* Register a command "normal" for the rescue mode. */
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323
normal/term.c
323
normal/term.c
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@ -28,11 +28,17 @@
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struct term_state
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{
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struct term_state *next;
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struct grub_unicode_glyph *backlog;
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int numlines;
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const struct grub_unicode_glyph *backlog_glyphs;
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const grub_uint32_t *backlog_ucs4;
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grub_size_t backlog_len;
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void *free;
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int num_lines;
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char *term_name;
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};
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static struct term_state *term_states = NULL;
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/* The amount of lines counted by the pager. */
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static unsigned grub_more_lines;
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@ -48,39 +54,51 @@ grub_normal_get_char_counter (void)
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}
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static void
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process_newline (void)
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print_more (void)
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{
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struct grub_term_output *cur;
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unsigned height = -1;
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FOR_ACTIVE_TERM_OUTPUTS(cur)
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if (grub_term_height (cur) < height)
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height = grub_term_height (cur);
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grub_more_lines++;
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if (grub_more && grub_more_lines >= height - 1)
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{
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char key;
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grub_uint16_t *pos;
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grub_term_output_t term;
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grub_uint32_t *unicode_str, *unicode_last_position;
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pos = grub_term_save_pos ();
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grub_utf8_to_ucs4_alloc ("--MORE--", &unicode_str,
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&unicode_last_position);
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if (!unicode_str)
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{
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grub_errno = GRUB_ERR_NONE;
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return;
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}
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grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
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grub_printf ("--MORE--");
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FOR_ACTIVE_TERM_OUTPUTS(term)
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{
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grub_print_ucs4 (unicode_str, unicode_last_position, 0, 0, term);
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}
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grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
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grub_free (unicode_str);
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key = grub_getkey ();
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/* Remove the message. */
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grub_term_restore_pos (pos);
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grub_printf (" ");
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FOR_ACTIVE_TERM_OUTPUTS(term)
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grub_print_spaces (term, 8);
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grub_term_restore_pos (pos);
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/* Scroll one lines or an entire page, depending on the key. */
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{
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static struct term_state *state;
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for (state = term_states; state; state = state->next)
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if (key == '\r' || key =='\n')
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grub_more_lines = height - 2;
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state->num_lines = 0;
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else
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grub_more_lines = 0;
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state->num_lines -= 2;
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}
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}
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@ -95,12 +113,6 @@ grub_set_more (int onoff)
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grub_more_lines = 0;
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}
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void
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grub_install_newline_hook (void)
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{
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grub_newline_hook = process_newline;
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}
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static grub_uint32_t
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map_code (grub_uint32_t in, struct grub_term_output *term)
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{
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@ -431,16 +443,10 @@ grub_putcode (grub_uint32_t code, struct grub_term_output *term)
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putcode_real (code, term);
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}
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void
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grub_print_ucs4 (const grub_uint32_t * str,
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const grub_uint32_t * last_position,
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int margin_left, int margin_right,
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struct grub_term_output *term)
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static grub_ssize_t
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get_maxwidth (struct grub_term_output *term,
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int margin_left, int margin_right)
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{
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grub_ssize_t max_width;
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grub_ssize_t startwidth;
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{
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struct grub_unicode_glyph space_glyph = {
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.base = ' ',
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.variant = 0,
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@ -448,56 +454,30 @@ grub_print_ucs4 (const grub_uint32_t * str,
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.ncomb = 0,
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.combining = 0
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};
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max_width = grub_term_width (term)
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return (grub_term_width (term)
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- grub_term_getcharwidth (term, &space_glyph)
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* (margin_left + margin_right) - 1;
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}
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* (margin_left + margin_right) - 1);
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}
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if (((term->getxy () >> 8) & 0xff) < margin_left)
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grub_print_spaces (term, margin_left - ((term->getxy () >> 8) & 0xff));
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static grub_ssize_t
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get_startwidth (struct grub_term_output *term,
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int margin_left)
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{
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return ((term->getxy () >> 8) & 0xff) - margin_left;
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}
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startwidth = ((term->getxy () >> 8) & 0xff) - margin_left;
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if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
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== GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS
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|| (term->flags & GRUB_TERM_CODE_TYPE_MASK)
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== GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
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{
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grub_ssize_t visual_len;
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struct grub_unicode_glyph *visual;
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struct grub_unicode_glyph *visual_ptr;
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auto grub_ssize_t getcharwidth (const struct grub_unicode_glyph *c);
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grub_ssize_t getcharwidth (const struct grub_unicode_glyph *c)
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{
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return grub_term_getcharwidth (term, c);
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}
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visual_len = grub_bidi_logical_to_visual (str, last_position - str,
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&visual, getcharwidth,
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max_width, startwidth);
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if (visual_len < 0)
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{
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grub_print_error ();
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return;
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}
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for (visual_ptr = visual; visual_ptr < visual + visual_len; visual_ptr++)
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{
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if (visual_ptr->base == '\n')
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grub_print_spaces (term, margin_right);
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putglyph (visual_ptr, term);
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if (visual_ptr->base == '\n')
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grub_print_spaces (term, margin_left);
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grub_free (visual_ptr->combining);
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}
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grub_free (visual);
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return;
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}
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{
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static int
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print_ucs4_terminal (const grub_uint32_t * str,
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const grub_uint32_t * last_position,
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int margin_left, int margin_right,
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struct grub_term_output *term,
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struct term_state *state)
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{
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const grub_uint32_t *ptr;
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grub_ssize_t startwidth = get_startwidth (term, margin_left);
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grub_ssize_t line_width = startwidth;
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grub_ssize_t lastspacewidth = 0;
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grub_ssize_t max_width = get_maxwidth (term, margin_left, margin_right);
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const grub_uint32_t *line_start = str, *last_space = str - 1;
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for (ptr = str; ptr < last_position; ptr++)
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@ -549,6 +529,15 @@ grub_print_ucs4 (const grub_uint32_t * str,
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grub_print_spaces (term, margin_right);
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grub_putcode ('\n', term);
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if (state && state->num_lines++
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>= (grub_ssize_t) grub_term_height (term))
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{
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state->backlog_ucs4 = (ptr == last_space || *ptr == '\n')
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? ptr + 1 : ptr;
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state->backlog_len = last_position - state->backlog_ucs4;
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return 1;
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}
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line_width -= lastspacewidth;
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grub_print_spaces (term, margin_left);
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if (ptr == last_space || *ptr == '\n')
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@ -570,20 +559,198 @@ grub_print_ucs4 (const grub_uint32_t * str,
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putcode_real (*ptr2, term);
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}
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}
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}
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return 0;
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}
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static struct term_state *
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find_term_state (struct grub_term_output *term)
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{
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struct term_state *state;
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for (state = term_states; state; state = state->next)
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if (grub_strcmp (state->term_name, term->name) == 0)
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return state;
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state = grub_zalloc (sizeof (*state));
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if (!state)
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{
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grub_errno = GRUB_ERR_NONE;
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return NULL;
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}
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state->term_name = grub_strdup (term->name);
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state->next = term_states;
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term_states = state;
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return state;
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}
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static int
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put_glyphs_terminal (const struct grub_unicode_glyph *visual,
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grub_ssize_t visual_len,
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int margin_left, int margin_right,
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struct grub_term_output *term,
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struct term_state *state)
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{
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const struct grub_unicode_glyph *visual_ptr;
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for (visual_ptr = visual; visual_ptr < visual + visual_len; visual_ptr++)
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{
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if (visual_ptr->base == '\n')
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grub_print_spaces (term, margin_right);
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putglyph (visual_ptr, term);
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if (state && state->num_lines++ >= (grub_ssize_t) grub_term_height (term))
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{
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state->backlog_glyphs = visual_ptr + 1;
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state->backlog_len = visual_len - (visual - visual_ptr) - 1;
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return 1;
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}
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if (visual_ptr->base == '\n')
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grub_print_spaces (term, margin_left);
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grub_free (visual_ptr->combining);
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}
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return 0;
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}
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static int
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print_backlog (struct grub_term_output *term,
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int margin_left, int margin_right)
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{
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struct term_state *state = find_term_state (term);
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if (!state)
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return 0;
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if (state->backlog_ucs4)
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{
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int ret;
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ret = print_ucs4_terminal (state->backlog_ucs4,
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state->backlog_ucs4 + state->backlog_len,
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margin_left, margin_right, term, state);
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if (!ret)
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{
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grub_free (state->free);
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state->free = NULL;
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state->backlog_len = 0;
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}
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return ret;
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}
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if (state->backlog_glyphs)
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{
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int ret;
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ret = put_glyphs_terminal (state->backlog_glyphs,
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state->backlog_len,
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margin_left, margin_right, term, state);
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if (!ret)
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{
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grub_free (state->free);
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state->free = NULL;
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state->backlog_len = 0;
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}
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return ret;
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}
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return 0;
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}
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static int
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print_ucs4_real (const grub_uint32_t * str,
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const grub_uint32_t * last_position,
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int margin_left, int margin_right,
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struct grub_term_output *term, int backlog)
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{
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struct term_state *state = NULL;
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if (backlog)
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state = find_term_state (term);
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if (((term->getxy () >> 8) & 0xff) < margin_left)
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grub_print_spaces (term, margin_left - ((term->getxy () >> 8) & 0xff));
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if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
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== GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS
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|| (term->flags & GRUB_TERM_CODE_TYPE_MASK)
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== GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
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{
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grub_ssize_t visual_len;
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struct grub_unicode_glyph *visual;
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int ret;
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auto grub_ssize_t getcharwidth (const struct grub_unicode_glyph *c);
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grub_ssize_t getcharwidth (const struct grub_unicode_glyph *c)
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{
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return grub_term_getcharwidth (term, c);
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}
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visual_len = grub_bidi_logical_to_visual (str, last_position - str,
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&visual, getcharwidth,
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get_maxwidth (term,
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margin_left,
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margin_right),
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get_startwidth (term,
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margin_left));
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if (visual_len < 0)
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{
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grub_print_error ();
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return 0;
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}
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ret = put_glyphs_terminal (visual, visual_len, margin_left, margin_right,
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term, state);
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if (!ret)
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grub_free (visual);
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else
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state->free = visual;
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return ret;
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}
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return print_ucs4_terminal (str, last_position, margin_left, margin_right,
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term, state);
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}
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void
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grub_print_ucs4 (const grub_uint32_t * str,
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const grub_uint32_t * last_position,
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int margin_left, int margin_right,
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struct grub_term_output *term)
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{
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print_ucs4_real (str, last_position, margin_left, margin_right,
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term, 0);
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}
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void
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grub_xputs_normal (const char *str)
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{
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grub_term_output_t term;
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grub_uint32_t *unicode_str, *unicode_last_position;
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int backlog = 0;
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grub_utf8_to_ucs4_alloc (str, &unicode_str,
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&unicode_last_position);
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if (!unicode_str)
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{
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grub_errno = GRUB_ERR_NONE;
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return;
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}
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FOR_ACTIVE_TERM_OUTPUTS(term)
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{
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grub_print_ucs4 (unicode_str, unicode_last_position, 0, 0, term);
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int cur;
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cur = print_ucs4_real (unicode_str, unicode_last_position, 0, 0,
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term, 1);
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if (cur)
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backlog = 1;
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}
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while (backlog)
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{
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print_more ();
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backlog = 0;
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FOR_ACTIVE_TERM_OUTPUTS(term)
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{
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int cur;
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cur = print_backlog (term, 0, 0);
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if (cur)
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backlog = 1;
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}
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}
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grub_free (unicode_str);
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}
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