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 |
81c82c4b TT |
126 | tui_source_window::set_contents (struct gdbarch *arch, |
127 | struct symtab *s, | |
128 | struct tui_line_or_address line_or_addr) | |
c906108c | 129 | { |
81c82c4b TT |
130 | gdb_assert (line_or_addr.loa == LOA_LINE); |
131 | int line_no = line_or_addr.u.line_no; | |
132 | ||
22940a24 | 133 | enum tui_status ret = TUI_FAILURE; |
c906108c | 134 | |
cafb3438 | 135 | if (s != NULL) |
c906108c | 136 | { |
62f29fda | 137 | int line_width, nlines; |
c906108c | 138 | |
29d2c474 | 139 | ret = TUI_SUCCESS; |
398fdd60 | 140 | line_width = width - TUI_EXECINFO_SIZE - 1; |
29d2c474 TT |
141 | /* Take hilite (window border) into account, when |
142 | calculating the number of lines. */ | |
81c82c4b | 143 | nlines = (line_no + (height - 2)) - line_no; |
29d2c474 TT |
144 | |
145 | std::string srclines; | |
146 | if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines, | |
147 | &srclines)) | |
20149b6b | 148 | ret = TUI_FAILURE; |
29d2c474 TT |
149 | else |
150 | { | |
151 | int cur_line_no, cur_line; | |
3add462f | 152 | struct tui_locator_window *locator |
29d2c474 | 153 | = tui_locator_win_info_ptr (); |
29d2c474 TT |
154 | const char *s_filename = symtab_to_filename_for_display (s); |
155 | ||
81c82c4b TT |
156 | xfree (title); |
157 | title = xstrdup (s_filename); | |
29d2c474 | 158 | |
81c82c4b TT |
159 | xfree (fullname); |
160 | fullname = xstrdup (symtab_to_fullname (s)); | |
29d2c474 TT |
161 | |
162 | cur_line = 0; | |
81c82c4b TT |
163 | gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s)); |
164 | start_line_or_addr.loa = LOA_LINE; | |
165 | cur_line_no = start_line_or_addr.u.line_no = line_no; | |
29d2c474 TT |
166 | |
167 | const char *iter = srclines.c_str (); | |
81c82c4b | 168 | content.resize (nlines); |
29d2c474 | 169 | while (cur_line < nlines) |
c906108c | 170 | { |
53e7cdba | 171 | struct tui_source_element *element |
81c82c4b | 172 | = &content[cur_line]; |
29d2c474 TT |
173 | |
174 | std::string text; | |
175 | if (*iter != '\0') | |
81c82c4b | 176 | text = copy_source_line (&iter, cur_line_no, horizontal_offset, |
29d2c474 TT |
177 | line_width); |
178 | ||
179 | /* Set whether element is the execution point | |
180 | and whether there is a break point on it. */ | |
53e7cdba TT |
181 | element->line_or_addr.loa = LOA_LINE; |
182 | element->line_or_addr.u.line_no = cur_line_no; | |
183 | element->is_exec_point | |
184 | = (filename_cmp (locator->full_name, | |
185 | symtab_to_fullname (s)) == 0 | |
186 | && cur_line_no == locator->line_no); | |
187 | ||
81c82c4b TT |
188 | xfree (content[cur_line].line); |
189 | content[cur_line].line | |
29d2c474 TT |
190 | = xstrdup (text.c_str ()); |
191 | ||
192 | cur_line++; | |
193 | cur_line_no++; | |
c906108c | 194 | } |
29d2c474 | 195 | ret = TUI_SUCCESS; |
c906108c SS |
196 | } |
197 | } | |
198 | return ret; | |
98427f35 | 199 | } |
c906108c SS |
200 | |
201 | ||
98427f35 SC |
202 | /* Function to display source in the source window. This function |
203 | initializes the horizontal scroll to 0. */ | |
c906108c | 204 | void |
bb01dbfc TT |
205 | tui_source_window::show_symtab_source (struct gdbarch *gdbarch, |
206 | struct symtab *s, | |
207 | struct tui_line_or_address line) | |
c906108c | 208 | { |
bb01dbfc TT |
209 | horizontal_offset = 0; |
210 | update_source_window_as_is (gdbarch, s, line); | |
98427f35 | 211 | } |
c906108c | 212 | |
c906108c | 213 | |
a358af15 AC |
214 | /* Answer whether the source is currently displayed in the source |
215 | window. */ | |
a38da35d TT |
216 | bool |
217 | tui_source_window::showing_source_p (const char *fullname) const | |
c906108c | 218 | { |
f6cc34a9 | 219 | return (!content.empty () |
3add462f | 220 | && (filename_cmp (tui_locator_win_info_ptr ()->full_name, |
56d397a3 | 221 | fullname) == 0)); |
98427f35 | 222 | } |
c906108c SS |
223 | |
224 | ||
98427f35 | 225 | /* Scroll the source forward or backward vertically. */ |
c906108c | 226 | void |
c3bd716f | 227 | tui_source_window::do_scroll_vertical (int num_to_scroll) |
c906108c | 228 | { |
53e7cdba | 229 | if (!content.empty ()) |
c906108c | 230 | { |
362c05fe | 231 | struct tui_line_or_address l; |
c906108c | 232 | struct symtab *s; |
52575520 | 233 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c | 234 | |
cafb3438 | 235 | if (cursal.symtab == NULL) |
34248c3a | 236 | s = find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL))); |
c906108c | 237 | else |
52575520 | 238 | s = cursal.symtab; |
c906108c | 239 | |
362c05fe | 240 | l.loa = LOA_LINE; |
53e7cdba | 241 | l.u.line_no = content[0].line_or_addr.u.line_no |
c3bd716f | 242 | + num_to_scroll; |
cb44333d TT |
243 | const std::vector<off_t> *offsets; |
244 | if (g_source_cache.get_line_charpos (s, &offsets) | |
245 | && l.u.line_no > offsets->size ()) | |
c3bd716f TT |
246 | /* line = s->nlines - win_info->content_size + 1; */ |
247 | /* elz: fix for dts 23398. */ | |
53e7cdba | 248 | l.u.line_no = content[0].line_or_addr.u.line_no; |
c3bd716f TT |
249 | if (l.u.line_no <= 0) |
250 | l.u.line_no = 1; | |
27229e99 | 251 | |
362c05fe | 252 | print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0); |
c906108c | 253 | } |
98427f35 | 254 | } |
b73dd877 TT |
255 | |
256 | tui_source_window::tui_source_window () | |
257 | : tui_source_window_base (SRC_WIN) | |
258 | { | |
259 | gdb::observers::source_styling_changed.attach | |
260 | (std::bind (&tui_source_window::style_changed, this), | |
261 | m_observable); | |
262 | } | |
263 | ||
264 | tui_source_window::~tui_source_window () | |
265 | { | |
266 | gdb::observers::source_styling_changed.detach (m_observable); | |
267 | } | |
268 | ||
269 | void | |
270 | tui_source_window::style_changed () | |
271 | { | |
2d83e710 | 272 | if (tui_active && is_visible ()) |
b73dd877 TT |
273 | refill (); |
274 | } | |
c2cd8994 TT |
275 | |
276 | bool | |
277 | tui_source_window::location_matches_p (struct bp_location *loc, int line_no) | |
278 | { | |
279 | return (content[line_no].line_or_addr.loa == LOA_LINE | |
280 | && content[line_no].line_or_addr.u.line_no == loc->line_number | |
281 | && loc->symtab != NULL | |
282 | && filename_cmp (fullname, | |
283 | symtab_to_fullname (loc->symtab)) == 0); | |
284 | } | |
a54700c6 | 285 | |
c9033fe8 TT |
286 | /* See tui-source.h. */ |
287 | ||
288 | bool | |
289 | tui_source_window::line_is_displayed (int line) const | |
290 | { | |
291 | bool is_displayed = false; | |
292 | int threshold = SCROLL_THRESHOLD; | |
293 | int i = 0; | |
294 | while (i < content.size () - threshold && !is_displayed) | |
295 | { | |
296 | is_displayed | |
297 | = (content[i].line_or_addr.loa == LOA_LINE | |
298 | && content[i].line_or_addr.u.line_no == line); | |
299 | i++; | |
300 | } | |
301 | ||
302 | return is_displayed; | |
303 | } | |
304 | ||
a54700c6 TT |
305 | void |
306 | tui_source_window::maybe_update (struct frame_info *fi, symtab_and_line sal, | |
307 | int line_no, CORE_ADDR addr) | |
308 | { | |
309 | int start_line = (line_no - (viewport_height / 2)) + 1; | |
310 | if (start_line <= 0) | |
311 | start_line = 1; | |
312 | ||
313 | bool source_already_displayed = (sal.symtab != 0 | |
314 | && showing_source_p (fullname)); | |
315 | ||
316 | struct tui_line_or_address l; | |
317 | ||
318 | l.loa = LOA_LINE; | |
319 | l.u.line_no = start_line; | |
320 | if (!(source_already_displayed | |
c9033fe8 | 321 | && line_is_displayed (line_no))) |
017f9828 | 322 | update_source_window (get_frame_arch (fi), sal.symtab, l); |
a54700c6 TT |
323 | else |
324 | { | |
325 | l.u.line_no = line_no; | |
326 | set_is_exec_point_at (l); | |
327 | } | |
328 | } |