1 /* TUI display source window.
3 Copyright (C) 1998-2019 Free Software Foundation, Inc.
5 Contributed by Hewlett-Packard Company.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "breakpoint.h"
30 #include "filenames.h"
31 #include "source-cache.h"
34 #include "tui/tui-data.h"
35 #include "tui/tui-io.h"
36 #include "tui/tui-stack.h"
37 #include "tui/tui-win.h"
38 #include "tui/tui-winsource.h"
39 #include "tui/tui-source.h"
40 #include "gdb_curses.h"
42 /* Function to display source in the source window. */
44 tui_source_window::set_contents (struct gdbarch
*arch
,
46 struct tui_line_or_address line_or_addr
)
48 gdb_assert (line_or_addr
.loa
== LOA_LINE
);
49 int line_no
= line_or_addr
.u
.line_no
;
51 enum tui_status ret
= TUI_FAILURE
;
55 int line_width
, nlines
;
58 line_width
= width
- TUI_EXECINFO_SIZE
- 1;
59 /* Take hilite (window border) into account, when
60 calculating the number of lines. */
61 nlines
= (line_no
+ (height
- 2)) - line_no
;
64 const std::vector
<off_t
> *offsets
;
65 if (!g_source_cache
.get_source_lines (s
, line_no
, line_no
+ nlines
,
67 || !g_source_cache
.get_line_charpos (s
, &offsets
))
71 int cur_line_no
, cur_line
;
72 struct tui_locator_window
*locator
73 = tui_locator_win_info_ptr ();
74 const char *s_filename
= symtab_to_filename_for_display (s
);
78 m_fullname
= make_unique_xstrdup (symtab_to_fullname (s
));
81 gdbarch
= get_objfile_arch (SYMTAB_OBJFILE (s
));
82 start_line_or_addr
.loa
= LOA_LINE
;
83 cur_line_no
= start_line_or_addr
.u
.line_no
= line_no
;
88 /* Solaris 11+gcc 5.5 has ambiguous overloads of log10, so we
89 cast to double to get the right one. */
90 double l
= log10 ((double) offsets
->size ());
94 const char *iter
= srclines
.c_str ();
95 content
.resize (nlines
);
96 while (cur_line
< nlines
)
98 struct tui_source_element
*element
103 text
= tui_copy_source_line (&iter
, cur_line_no
,
107 /* Set whether element is the execution point
108 and whether there is a break point on it. */
109 element
->line_or_addr
.loa
= LOA_LINE
;
110 element
->line_or_addr
.u
.line_no
= cur_line_no
;
111 element
->is_exec_point
112 = (filename_cmp (locator
->full_name
.c_str (),
113 symtab_to_fullname (s
)) == 0
114 && cur_line_no
== locator
->line_no
);
116 content
[cur_line
].line
= std::move (text
);
128 /* Answer whether the source is currently displayed in the source
131 tui_source_window::showing_source_p (const char *fullname
) const
133 return (!content
.empty ()
134 && (filename_cmp (tui_locator_win_info_ptr ()->full_name
.c_str (),
139 /* Scroll the source forward or backward vertically. */
141 tui_source_window::do_scroll_vertical (int num_to_scroll
)
143 if (!content
.empty ())
145 struct tui_line_or_address l
;
147 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
149 if (cursal
.symtab
== NULL
)
150 s
= find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL
)));
155 l
.u
.line_no
= content
[0].line_or_addr
.u
.line_no
157 const std::vector
<off_t
> *offsets
;
158 if (g_source_cache
.get_line_charpos (s
, &offsets
)
159 && l
.u
.line_no
> offsets
->size ())
160 /* line = s->nlines - win_info->content_size + 1; */
161 /* elz: fix for dts 23398. */
162 l
.u
.line_no
= content
[0].line_or_addr
.u
.line_no
;
163 if (l
.u
.line_no
<= 0)
166 print_source_lines (s
, l
.u
.line_no
, l
.u
.line_no
+ 1, 0);
171 tui_source_window::location_matches_p (struct bp_location
*loc
, int line_no
)
173 return (content
[line_no
].line_or_addr
.loa
== LOA_LINE
174 && content
[line_no
].line_or_addr
.u
.line_no
== loc
->line_number
175 && loc
->symtab
!= NULL
176 && filename_cmp (m_fullname
.get (),
177 symtab_to_fullname (loc
->symtab
)) == 0);
180 /* See tui-source.h. */
183 tui_source_window::line_is_displayed (int line
) const
185 bool is_displayed
= false;
186 int threshold
= SCROLL_THRESHOLD
;
188 while (i
< content
.size () - threshold
&& !is_displayed
)
191 = (content
[i
].line_or_addr
.loa
== LOA_LINE
192 && content
[i
].line_or_addr
.u
.line_no
== line
);
200 tui_source_window::maybe_update (struct frame_info
*fi
, symtab_and_line sal
)
202 int start_line
= (sal
.line
- (viewport_height
/ 2)) + 1;
206 bool source_already_displayed
= (sal
.symtab
!= 0
207 && showing_source_p (m_fullname
.get ()));
209 struct tui_line_or_address l
;
212 l
.u
.line_no
= start_line
;
213 if (!(source_already_displayed
&& line_is_displayed (sal
.line
)))
214 update_source_window (get_frame_arch (fi
), sal
.symtab
, l
);
217 l
.u
.line_no
= sal
.line
;
218 set_is_exec_point_at (l
);