Commit | Line | Data |
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f377b406 | 1 | /* TUI display source window. |
f33c6cbf | 2 | |
42a4f53d | 3 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
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 | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
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. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include <ctype.h> | |
24 | #include "symtab.h" | |
25 | #include "frame.h" | |
26 | #include "breakpoint.h" | |
c2c6d25f | 27 | #include "source.h" |
13274fc3 | 28 | #include "objfiles.h" |
a7417d46 | 29 | #include "filenames.h" |
62f29fda | 30 | #include "source-cache.h" |
c906108c | 31 | |
d7b2e967 AC |
32 | #include "tui/tui.h" |
33 | #include "tui/tui-data.h" | |
62f29fda | 34 | #include "tui/tui-io.h" |
d7b2e967 AC |
35 | #include "tui/tui-stack.h" |
36 | #include "tui/tui-winsource.h" | |
37 | #include "tui/tui-source.h" | |
6a83354a | 38 | #include "gdb_curses.h" |
c906108c | 39 | |
62f29fda TT |
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. */ | |
44 | ||
45 | static std::string | |
46 | copy_source_line (const char **ptr, int line_no, int first_col, | |
47 | int line_width) | |
48 | { | |
49 | const char *lineptr = *ptr; | |
50 | ||
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, ' '); | |
56 | ||
57 | int column = 0; | |
58 | char c; | |
59 | do | |
60 | { | |
61 | int skip_bytes; | |
62 | ||
63 | c = *lineptr; | |
64 | if (c == '\033' && skip_ansi_escape (lineptr, &skip_bytes)) | |
65 | { | |
66 | /* We always have to preserve escapes. */ | |
67 | result.append (lineptr, lineptr + skip_bytes); | |
68 | lineptr += skip_bytes; | |
69 | continue; | |
70 | } | |
71 | ||
72 | ++lineptr; | |
73 | ++column; | |
647bb750 HD |
74 | |
75 | auto process_tab = [&] () | |
76 | { | |
77 | int max_tab_len = tui_tab_width; | |
78 | ||
79 | --column; | |
80 | for (int j = column % max_tab_len; | |
81 | j < max_tab_len && column < first_col + line_width; | |
82 | column++, j++) | |
83 | if (column >= first_col) | |
84 | result.push_back (' '); | |
85 | }; | |
86 | ||
62f29fda TT |
87 | /* We have to process all the text in order to pick up all the |
88 | escapes. */ | |
647bb750 HD |
89 | if (column <= first_col || column > first_col + line_width) |
90 | { | |
91 | if (c == '\t') | |
92 | process_tab (); | |
93 | continue; | |
94 | } | |
62f29fda TT |
95 | |
96 | if (c == '\n' || c == '\r' || c == '\0') | |
97 | { | |
98 | /* Nothing. */ | |
99 | } | |
100 | else if (c < 040 && c != '\t') | |
101 | { | |
102 | result.push_back ('^'); | |
103 | result.push_back (c + 0100); | |
104 | } | |
105 | else if (c == 0177) | |
106 | { | |
107 | result.push_back ('^'); | |
108 | result.push_back ('?'); | |
109 | } | |
110 | else if (c == '\t') | |
647bb750 | 111 | process_tab (); |
62f29fda TT |
112 | else |
113 | result.push_back (c); | |
114 | } | |
115 | while (c != '\0' && c != '\n' && c != '\r'); | |
116 | ||
117 | if (c == '\r' && *lineptr == '\n') | |
118 | ++lineptr; | |
119 | *ptr = lineptr; | |
120 | ||
121 | return result; | |
122 | } | |
123 | ||
98427f35 | 124 | /* Function to display source in the source window. */ |
a358af15 | 125 | enum tui_status |
5813316f TT |
126 | tui_set_source_content (tui_source_window_base *win_info, |
127 | struct symtab *s, | |
08ef48c5 MS |
128 | int line_no, |
129 | int noerror) | |
c906108c | 130 | { |
22940a24 | 131 | enum tui_status ret = TUI_FAILURE; |
c906108c | 132 | |
cafb3438 | 133 | if (s != NULL) |
c906108c | 134 | { |
62f29fda | 135 | int line_width, nlines; |
c906108c | 136 | |
29d2c474 | 137 | ret = TUI_SUCCESS; |
5813316f | 138 | line_width = win_info->width - 1; |
29d2c474 TT |
139 | /* Take hilite (window border) into account, when |
140 | calculating the number of lines. */ | |
5813316f | 141 | nlines = (line_no + (win_info->height - 2)) - line_no; |
29d2c474 TT |
142 | |
143 | std::string srclines; | |
144 | if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines, | |
145 | &srclines)) | |
c906108c | 146 | { |
29d2c474 | 147 | if (!noerror) |
c906108c | 148 | { |
29d2c474 TT |
149 | const char *filename = symtab_to_filename_for_display (s); |
150 | char *name = (char *) alloca (strlen (filename) + 100); | |
151 | ||
152 | sprintf (name, "%s:%d", filename, line_no); | |
153 | print_sys_errmsg (name, errno); | |
c906108c | 154 | } |
29d2c474 TT |
155 | ret = TUI_FAILURE; |
156 | } | |
157 | else | |
158 | { | |
159 | int cur_line_no, cur_line; | |
3add462f | 160 | struct tui_locator_window *locator |
29d2c474 | 161 | = tui_locator_win_info_ptr (); |
29d2c474 TT |
162 | const char *s_filename = symtab_to_filename_for_display (s); |
163 | ||
5813316f TT |
164 | xfree (win_info->title); |
165 | win_info->title = xstrdup (s_filename); | |
29d2c474 | 166 | |
5813316f TT |
167 | xfree (win_info->fullname); |
168 | win_info->fullname = xstrdup (symtab_to_fullname (s)); | |
29d2c474 TT |
169 | |
170 | cur_line = 0; | |
5813316f TT |
171 | win_info->gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s)); |
172 | win_info->start_line_or_addr.loa = LOA_LINE; | |
173 | cur_line_no = win_info->start_line_or_addr.u.line_no = line_no; | |
29d2c474 TT |
174 | |
175 | const char *iter = srclines.c_str (); | |
5813316f | 176 | win_info->content.resize (nlines); |
29d2c474 | 177 | while (cur_line < nlines) |
c906108c | 178 | { |
53e7cdba | 179 | struct tui_source_element *element |
5813316f | 180 | = &win_info->content[cur_line]; |
29d2c474 TT |
181 | |
182 | std::string text; | |
183 | if (*iter != '\0') | |
184 | text = copy_source_line (&iter, cur_line_no, | |
5813316f | 185 | win_info->horizontal_offset, |
29d2c474 TT |
186 | line_width); |
187 | ||
188 | /* Set whether element is the execution point | |
189 | and whether there is a break point on it. */ | |
53e7cdba TT |
190 | element->line_or_addr.loa = LOA_LINE; |
191 | element->line_or_addr.u.line_no = cur_line_no; | |
192 | element->is_exec_point | |
193 | = (filename_cmp (locator->full_name, | |
194 | symtab_to_fullname (s)) == 0 | |
195 | && cur_line_no == locator->line_no); | |
196 | ||
5813316f TT |
197 | xfree (win_info->content[cur_line].line); |
198 | win_info->content[cur_line].line | |
29d2c474 TT |
199 | = xstrdup (text.c_str ()); |
200 | ||
201 | cur_line++; | |
202 | cur_line_no++; | |
c906108c | 203 | } |
29d2c474 | 204 | ret = TUI_SUCCESS; |
c906108c SS |
205 | } |
206 | } | |
207 | return ret; | |
98427f35 | 208 | } |
c906108c SS |
209 | |
210 | ||
98427f35 SC |
211 | /* Function to display source in the source window. This function |
212 | initializes the horizontal scroll to 0. */ | |
c906108c | 213 | void |
5813316f TT |
214 | tui_show_symtab_source (tui_source_window_base *win_info, |
215 | struct gdbarch *gdbarch, struct symtab *s, | |
08ef48c5 MS |
216 | struct tui_line_or_address line, |
217 | int noerror) | |
c906108c | 218 | { |
5813316f TT |
219 | win_info->horizontal_offset = 0; |
220 | tui_update_source_window_as_is (win_info, gdbarch, s, line, noerror); | |
98427f35 | 221 | } |
c906108c | 222 | |
c906108c | 223 | |
a358af15 AC |
224 | /* Answer whether the source is currently displayed in the source |
225 | window. */ | |
a38da35d TT |
226 | bool |
227 | tui_source_window::showing_source_p (const char *fullname) const | |
c906108c | 228 | { |
f6cc34a9 | 229 | return (!content.empty () |
3add462f | 230 | && (filename_cmp (tui_locator_win_info_ptr ()->full_name, |
56d397a3 | 231 | fullname) == 0)); |
98427f35 | 232 | } |
c906108c SS |
233 | |
234 | ||
98427f35 | 235 | /* Scroll the source forward or backward vertically. */ |
c906108c | 236 | void |
c3bd716f | 237 | tui_source_window::do_scroll_vertical (int num_to_scroll) |
c906108c | 238 | { |
53e7cdba | 239 | if (!content.empty ()) |
c906108c | 240 | { |
362c05fe | 241 | struct tui_line_or_address l; |
c906108c | 242 | struct symtab *s; |
52575520 | 243 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c | 244 | |
cafb3438 | 245 | if (cursal.symtab == NULL) |
34248c3a | 246 | s = find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL))); |
c906108c | 247 | else |
52575520 | 248 | s = cursal.symtab; |
c906108c | 249 | |
362c05fe | 250 | l.loa = LOA_LINE; |
53e7cdba | 251 | l.u.line_no = content[0].line_or_addr.u.line_no |
c3bd716f | 252 | + num_to_scroll; |
cb44333d TT |
253 | const std::vector<off_t> *offsets; |
254 | if (g_source_cache.get_line_charpos (s, &offsets) | |
255 | && l.u.line_no > offsets->size ()) | |
c3bd716f TT |
256 | /* line = s->nlines - win_info->content_size + 1; */ |
257 | /* elz: fix for dts 23398. */ | |
53e7cdba | 258 | l.u.line_no = content[0].line_or_addr.u.line_no; |
c3bd716f TT |
259 | if (l.u.line_no <= 0) |
260 | l.u.line_no = 1; | |
27229e99 | 261 | |
362c05fe | 262 | print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0); |
c906108c | 263 | } |
98427f35 | 264 | } |
b73dd877 TT |
265 | |
266 | tui_source_window::tui_source_window () | |
267 | : tui_source_window_base (SRC_WIN) | |
268 | { | |
269 | gdb::observers::source_styling_changed.attach | |
270 | (std::bind (&tui_source_window::style_changed, this), | |
271 | m_observable); | |
272 | } | |
273 | ||
274 | tui_source_window::~tui_source_window () | |
275 | { | |
276 | gdb::observers::source_styling_changed.detach (m_observable); | |
277 | } | |
278 | ||
279 | void | |
280 | tui_source_window::style_changed () | |
281 | { | |
2d83e710 | 282 | if (tui_active && is_visible ()) |
b73dd877 TT |
283 | refill (); |
284 | } | |
c2cd8994 TT |
285 | |
286 | bool | |
287 | tui_source_window::location_matches_p (struct bp_location *loc, int line_no) | |
288 | { | |
289 | return (content[line_no].line_or_addr.loa == LOA_LINE | |
290 | && content[line_no].line_or_addr.u.line_no == loc->line_number | |
291 | && loc->symtab != NULL | |
292 | && filename_cmp (fullname, | |
293 | symtab_to_fullname (loc->symtab)) == 0); | |
294 | } | |
a54700c6 | 295 | |
c9033fe8 TT |
296 | /* See tui-source.h. */ |
297 | ||
298 | bool | |
299 | tui_source_window::line_is_displayed (int line) const | |
300 | { | |
301 | bool is_displayed = false; | |
302 | int threshold = SCROLL_THRESHOLD; | |
303 | int i = 0; | |
304 | while (i < content.size () - threshold && !is_displayed) | |
305 | { | |
306 | is_displayed | |
307 | = (content[i].line_or_addr.loa == LOA_LINE | |
308 | && content[i].line_or_addr.u.line_no == line); | |
309 | i++; | |
310 | } | |
311 | ||
312 | return is_displayed; | |
313 | } | |
314 | ||
a54700c6 TT |
315 | void |
316 | tui_source_window::maybe_update (struct frame_info *fi, symtab_and_line sal, | |
317 | int line_no, CORE_ADDR addr) | |
318 | { | |
319 | int start_line = (line_no - (viewport_height / 2)) + 1; | |
320 | if (start_line <= 0) | |
321 | start_line = 1; | |
322 | ||
323 | bool source_already_displayed = (sal.symtab != 0 | |
324 | && showing_source_p (fullname)); | |
325 | ||
326 | struct tui_line_or_address l; | |
327 | ||
328 | l.loa = LOA_LINE; | |
329 | l.u.line_no = start_line; | |
330 | if (!(source_already_displayed | |
c9033fe8 | 331 | && line_is_displayed (line_no))) |
a54700c6 TT |
332 | tui_update_source_window (this, get_frame_arch (fi), |
333 | sal.symtab, l, TRUE); | |
334 | else | |
335 | { | |
336 | l.u.line_no = line_no; | |
337 | set_is_exec_point_at (l); | |
338 | } | |
339 | } |