2fcb42d929941ea27a7ba7598a7f15f0bac2f18f
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/>. */
26 #include "breakpoint.h"
29 #include "filenames.h"
30 #include "source-cache.h"
33 #include "tui/tui-data.h"
34 #include "tui/tui-io.h"
35 #include "tui/tui-stack.h"
36 #include "tui/tui-winsource.h"
37 #include "tui/tui-source.h"
38 #include "gdb_curses.h"
40 /* A helper function for tui_set_source_content that extracts some
41 source text from PTR. LINE_NO is the line number; FIRST_COL is the
42 first column to extract, and LINE_WIDTH is the number of characters
43 to display. Returns a string holding the desired text. */
46 copy_source_line (const char **ptr
, int line_no
, int first_col
,
49 const char *lineptr
= *ptr
;
51 /* Init the line with the line number. */
52 std::string result
= string_printf ("%-6d", line_no
);
53 int len
= result
.size ();
54 len
= len
- ((len
/ tui_tab_width
) * tui_tab_width
);
55 result
.append (len
, ' ');
64 if (c
== '\033' && skip_ansi_escape (lineptr
, &skip_bytes
))
66 /* We always have to preserve escapes. */
67 result
.append (lineptr
, lineptr
+ skip_bytes
);
68 lineptr
+= skip_bytes
;
75 auto process_tab
= [&] ()
77 int max_tab_len
= tui_tab_width
;
80 for (int j
= column
% max_tab_len
;
81 j
< max_tab_len
&& column
< first_col
+ line_width
;
83 if (column
>= first_col
)
84 result
.push_back (' ');
87 /* We have to process all the text in order to pick up all the
89 if (column
<= first_col
|| column
> first_col
+ line_width
)
96 if (c
== '\n' || c
== '\r' || c
== '\0')
100 else if (c
< 040 && c
!= '\t')
102 result
.push_back ('^');
103 result
.push_back (c
+ 0100);
107 result
.push_back ('^');
108 result
.push_back ('?');
113 result
.push_back (c
);
115 while (c
!= '\0' && c
!= '\n' && c
!= '\r');
117 if (c
== '\r' && *lineptr
== '\n')
124 /* Function to display source in the source window. */
126 tui_set_source_content (tui_source_window_base
*win_info
,
131 enum tui_status ret
= TUI_FAILURE
;
135 int line_width
, nlines
;
138 tui_alloc_source_buffer (win_info
);
139 line_width
= win_info
->width
- 1;
140 /* Take hilite (window border) into account, when
141 calculating the number of lines. */
142 nlines
= (line_no
+ (win_info
->height
- 2)) - line_no
;
144 std::string srclines
;
145 if (!g_source_cache
.get_source_lines (s
, line_no
, line_no
+ nlines
,
150 const char *filename
= symtab_to_filename_for_display (s
);
151 char *name
= (char *) alloca (strlen (filename
) + 100);
153 sprintf (name
, "%s:%d", filename
, line_no
);
154 print_sys_errmsg (name
, errno
);
160 int cur_line_no
, cur_line
;
161 struct tui_locator_window
*locator
162 = tui_locator_win_info_ptr ();
163 const char *s_filename
= symtab_to_filename_for_display (s
);
165 xfree (win_info
->title
);
166 win_info
->title
= xstrdup (s_filename
);
168 xfree (win_info
->fullname
);
169 win_info
->fullname
= xstrdup (symtab_to_fullname (s
));
172 win_info
->gdbarch
= get_objfile_arch (SYMTAB_OBJFILE (s
));
173 win_info
->start_line_or_addr
.loa
= LOA_LINE
;
174 cur_line_no
= win_info
->start_line_or_addr
.u
.line_no
= line_no
;
176 const char *iter
= srclines
.c_str ();
177 win_info
->content
.resize (nlines
);
178 while (cur_line
< nlines
)
180 struct tui_source_element
*element
181 = &win_info
->content
[cur_line
];
185 text
= copy_source_line (&iter
, cur_line_no
,
186 win_info
->horizontal_offset
,
189 /* Set whether element is the execution point
190 and whether there is a break point on it. */
191 element
->line_or_addr
.loa
= LOA_LINE
;
192 element
->line_or_addr
.u
.line_no
= cur_line_no
;
193 element
->is_exec_point
194 = (filename_cmp (locator
->full_name
,
195 symtab_to_fullname (s
)) == 0
196 && cur_line_no
== locator
->line_no
);
198 xfree (win_info
->content
[cur_line
].line
);
199 win_info
->content
[cur_line
].line
200 = xstrdup (text
.c_str ());
212 /* elz: This function sets the contents of the source window to empty
213 except for a line in the middle with a warning message about the
214 source not being available. This function is called by
215 tui_erase_source_contents(), which in turn is invoked when the
216 source files cannot be accessed. */
219 tui_set_source_content_nil (struct tui_source_window_base
*win_info
,
220 const char *warning_string
)
226 line_width
= win_info
->width
- 1;
227 n_lines
= win_info
->height
- 2;
229 /* Set to empty each line in the window, except for the one which
230 contains the message. */
231 while (curr_line
< win_info
->content
.size ())
233 /* Set the information related to each displayed line to null:
234 i.e. the line number is 0, there is no bp, it is not where
235 the program is stopped. */
237 struct tui_source_element
*element
= &win_info
->content
[curr_line
];
239 element
->line_or_addr
.loa
= LOA_LINE
;
240 element
->line_or_addr
.u
.line_no
= 0;
241 element
->is_exec_point
= false;
242 element
->break_mode
= 0;
244 /* Set the contents of the line to blank. */
245 element
->line
[0] = (char) 0;
247 /* If the current line is in the middle of the screen, then we
248 want to display the 'no source available' message in it.
249 Note: the 'weird' arithmetic with the line width and height
250 comes from the function tui_erase_source_content(). We need
251 to keep the screen and the window's actual contents in
254 if (curr_line
== (n_lines
/ 2 + 1))
257 int warning_length
= strlen (warning_string
);
260 if (warning_length
>= ((line_width
- 1) / 2))
263 xpos
= (line_width
- 1) / 2 - warning_length
;
265 src_line
= xstrprintf ("%s%s", n_spaces (xpos
), warning_string
);
266 xfree (element
->line
);
267 element
->line
= src_line
;
275 /* Function to display source in the source window. This function
276 initializes the horizontal scroll to 0. */
278 tui_show_symtab_source (tui_source_window_base
*win_info
,
279 struct gdbarch
*gdbarch
, struct symtab
*s
,
280 struct tui_line_or_address line
,
283 win_info
->horizontal_offset
= 0;
284 tui_update_source_window_as_is (win_info
, gdbarch
, s
, line
, noerror
);
288 /* Answer whether the source is currently displayed in the source
291 tui_source_window::showing_source_p (const char *fullname
) const
293 return (content_in_use
294 && (filename_cmp (tui_locator_win_info_ptr ()->full_name
,
299 /* Scroll the source forward or backward vertically. */
301 tui_source_window::do_scroll_vertical (int num_to_scroll
)
303 if (!content
.empty ())
305 struct tui_line_or_address l
;
307 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
309 if (cursal
.symtab
== NULL
)
310 s
= find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL
)));
315 l
.u
.line_no
= content
[0].line_or_addr
.u
.line_no
317 if (l
.u
.line_no
> s
->nlines
)
318 /* line = s->nlines - win_info->content_size + 1; */
319 /* elz: fix for dts 23398. */
320 l
.u
.line_no
= content
[0].line_or_addr
.u
.line_no
;
321 if (l
.u
.line_no
<= 0)
324 print_source_lines (s
, l
.u
.line_no
, l
.u
.line_no
+ 1, 0);
328 tui_source_window::tui_source_window ()
329 : tui_source_window_base (SRC_WIN
)
331 gdb::observers::source_styling_changed
.attach
332 (std::bind (&tui_source_window::style_changed
, this),
336 tui_source_window::~tui_source_window ()
338 gdb::observers::source_styling_changed
.detach (m_observable
);
342 tui_source_window::style_changed ()
344 if (tui_active
&& is_visible
)
349 tui_source_window::location_matches_p (struct bp_location
*loc
, int line_no
)
351 return (content
[line_no
].line_or_addr
.loa
== LOA_LINE
352 && content
[line_no
].line_or_addr
.u
.line_no
== loc
->line_number
353 && loc
->symtab
!= NULL
354 && filename_cmp (fullname
,
355 symtab_to_fullname (loc
->symtab
)) == 0);
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